CN103023366A - Half-bridge five-electrical-level inverter and high-frequency insulation-type half-bridge five-electrical-level inverter - Google Patents
Half-bridge five-electrical-level inverter and high-frequency insulation-type half-bridge five-electrical-level inverter Download PDFInfo
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Abstract
The invention discloses a half-bridge five-electrical-level inverter and a high-frequency insulation-type half-bridge five-electrical-level inverter. A construction technique of a clamping-type multi-electrical-level circuit is applied to a Buck-type inverter; a clamping diode in a diode clamping-type three-electrical-level circuit is replaced into a power switch tube, so that a high-frequency insulation transformer primary side winding can obtain the direct-current power supply voltage, and meanwhile, the power switch tube also can play a role in clamping a diode, so that five types of electrical levels of +Ui, -Ui, +Ui/2, -Ui/2, and 0 can be obtained on the primary side winding; the five types of electrical level also can be inducted on an auxiliary side winding; and the output five electrical levels obtains the stable sine alternating-current voltage through the filtering of a cyclic wave converter and an output filter. According to the invention, the power conversion number of stages is less; power switch devices are less; the power switch tube voltage stress is low; the selection range of the power switch tube is widened; the bidirectional power flow can be realized; the electrical insulation property is provided; the voltage spectrum property at the front end of the output filter is good; and the volume and the weight can be reduced.
Description
Technical field
The invention belongs to the Technics of Power Electronic Conversion technical field, particularly a kind of half-bridge five-electrical level inverter and application thereof.
Background technology
Directly-and to hand over (DC-AC) converter technique be the applied power semiconductor device, converts direct current energy a kind of Semiconductor Converting Technology of AC energy to, be widely used in national defence, industrial and mining enterprises, scientific research institutions, laboratory in colleges and universities and the daily life.
Up to now, both at home and abroad the power electronics researcher for directly-research of AC-AC converter, mainly concentrate on two level such as non-electrical isolation formula, low frequency and high frequency electrical isolation formula straight-AC-AC converter; Research for multi-level converter, mainly concentrate on many level straight-straight, straight-hand over and friendship-DC converter, for many level straight-research of AC-AC converter is then considerably less, and only be confined to non-isolated, low frequency or intermediate frequency isolated straight-the many level of friendship type are straight-AC-AC converter and fewer to the inverter research of many level of high frequency isolation type two stage power conversion.
Multi-electrical level inverter mainly contains three class topological structures: (1) Diode-clamped inverter, (2) capacitor-clamped type inverter, (3) have the cascaded inverter of independent DC power supply direct current.Diode-clamped, capacitor-clamped type multi-electrical level inverter have advantage applicable and high input voltage high-power inverter occasion: the cascade multilevel inverter with independent DC power supply has the advantage that is applicable to low input, high output voltage high power contravariant occasion.But diode-clamped, the flat inversion transformation technique of capacitor-clamped many level of type multiple spot exist topological form single, without defectives such as electrical isolation: there are the defectives such as the complicated input side power factor of circuit topology is low, conversion efficiency is on the low side, power density is low in the cascading multiple electrical level inversion transformation technique with independent DC power supply;
The high frequency link inversion transformation technique has replaced Industrial Frequency Transformer in the low frequency link inversion transformation technique with high frequency transformer, has overcome the shortcoming of low frequency inversion transformation technique, has significantly improved the characteristic of inverter, will replace the low frequency link inverter, is used widely.Along with science and technology of aviation and avionic fast development, the aircraft secondary power supply must be to high power density, high efficiency and modularization future development; In addition in the development and use of the renewable energy resources, be applicable to the solar array inverter in parallel with electrical network and the inversion occasions such as fuel cell inverter and uninterrupted power supply, annulus inverter in high frequency all is with a wide range of applications, and particularly the volume of inverter, the inversion occasion that weight has higher requirements is had prior application prospect.
Advance over 10 years, around the high frequency link inversion transformation technique, Chinese scholars has been done a large amount of research work, has obtained many valuable achievements in research." the unidirectional Buck type annulus inverter in high frequency " that the people such as nineteen ninety S.R.Narayana Prakask propose, DC/DC converter and the cascade of buck type inverter bridge by high frequency electrical isolation form, and have unidirectional power stream, three grades of power conversions (DC-HFAC-DC-LFAC), conversion efficiency height, large, the high in cost of production characteristics of power device switching loss when adopting conventional P WM technology.The people such as I.Yamato have proposed " two-way Buck type annulus inverter in high frequency " in 1988, this inverter is formed by high frequency electrical isolation inverter and the cascade of Buck type frequency converter, the frequency converter that is made of the four-quadrant power switch all has the simultaneously conducting of two or four power device at any turn-on cycle, and conduction loss is larger.The characteristics such as have bidirectional power flow, the two-layer configuration of direct current-high frequency pulse AC-low-frequency ac, efficient is higher, conduction loss is large.This but " two-way Buck type annulus inverter in high frequency " at the voltage that the filter inductance front end produces be+Ui ,-Ui, two level or be+Ui, 0 ,-Ui, three level, consider the range of choice that under the high input voltage occasion, enlarges power device, the voltage stress of power switch pipe is low, so this inherent shortcoming has restricted this " two-way Buck type annulus inverter in high frequency " in the application of high input voltage high-power inverter occasion.
And present many level of high-frequency isolation pattern topological structure great majority of studying concentrate on middle unidirectional Buck type annulus inverter in high frequency with DC link.Just in the DC/DC of high frequency electrical isolation converter, added multilevel converter.Just reduced the voltage stress of switching tube in the DC/DC converter of high frequency electrical isolation, and at the many level of the inreal realization of output inductor front end, do not reduce the voltage stress of the switching tube of Buck type inverter bridge, the output inductor capacitance is not all reduced.And this many level topology is to propose on the basis of unidirectional Buck type annulus inverter in high frequency, because the inherent shortcoming of unidirectional Buck type annulus inverter in high frequency, so the many level topologys of this a series of high-frequency isolation pattern application scenario is restricted.
Summary of the invention
The object of the present invention is to provide and a kind ofly have that two stage power conversion, bidirectional power flow, output filter front voltage spectral characteristic are good, the voltage stress of high power density, reduction switching device, can realize the high frequency isolation type half-bridge five-electrical level inverter of AC load and DC power supply high frequency electrical isolation.
The technical solution that realizes the object of the invention is:
A kind of half-bridge five-electrical level inverter, the positive pole of the first input capacitance, the drain electrode of the first power switch pipe links to each other with the negative electrode of the first diode, the negative pole of the second input capacitance, the source electrode of the 4th power switch pipe links to each other with the anode of the 4th diode, the negative pole of the first input capacitance, the positive pole of the second input capacitance, the negative electrode of the drain electrode of the 8th power switch pipe and the 8th diode connects together, the source electrode of the 7th power switch pipe connects, the source electrode of the 8th power switch pipe, the anode of the anode of the 7th diode and the 8th diode connects together, the source electrode of the first power switch pipe is connected in the drain electrode of the second power switch pipe, the anode of the drain electrode of the 5th power switch pipe and the first diode, the drain electrode of the 5th power switch pipe connects the negative electrode with the 5th diode, the drain electrode of the second power switch pipe connects the negative electrode with the second diode, the source electrode of the 5th power switch pipe, the anode of the 5th diode, the negative electrode of the 7th diode, the drain electrode of the 7th power switch pipe, the negative electrode of the drain electrode of the 6th power switch pipe and the 6th diode connects together, the source electrode of the second power switch pipe, the anode of the second diode, the negative electrode of the drain electrode of the 3rd power switch pipe and the 3rd diode connects together, the source electrode of the 3rd power switch pipe, the anode of the 3rd diode, the source electrode of the 6th power switch pipe, the anode of the 6th diode, the negative electrode of the drain electrode of the 4th power switch pipe and the 4th diode connects together, the negative pole of the positive pole of the first input capacitance and the second input capacitance is respectively the two ends of input DC power, and the drain electrode of the source electrode of the second power switch pipe and the 7th power switch pipe is respectively the two ends of output AC.
A kind of high frequency isolation type half-bridge five-electrical level inverter that uses the half-bridge five-electrical level inverter, by the input DC power that connects successively, high-frequency inverter, high frequency transformer, frequency converter, output filter, the output AC load consists of, described high-frequency inverter is the half-bridge five-electrical level inverter, wherein, the positive pole of input DC power is connected with the positive pole of half-bridge five-electrical level inverter, the negative pole of input DC power is connected with the negative pole of half-bridge five-electrical level inverter, the output of half-bridge five-electrical level inverter is connected with the armature winding of high frequency transformer, the secondary winding of high frequency transformer is connected with the input of frequency converter, the output of frequency converter links to each other with the input of output filter, and the output of output filter links to each other with the output AC load.
The present invention compared with prior art, its remarkable advantage:
(1) in the utilization of structure thinking and Buck type inverter with many level of Clamp topology.And in input DC power and AC load, insert high-frequency isolation transformer, realized the electrical isolation of input side and load-side.The use of high-frequency isolation transformer has realized miniaturization, the lightweight of converter, has improved the efficient of converter.
(2) compare with traditional " two-way Buck type annulus inverter in high frequency ", the present invention can access at the output inductor front end+Ui ,+Ui/2,0 ,-Ui ,-five kinds of level of Ui/2, improved the utilance of DC power supply, thereby reduced the voltage stress of power switch pipe, widened the range of choice of power switch pipe, the filter inductance capacitance is all reduced.Requiring the high-voltage large-capacity inversion occasion of electrical isolation civilian, industrial, national defence etc., adopt inversion topological of the present invention can well adapt to this occasion, is more satisfactory inverter solution.
(3) high-frequency isolation transformer among the present invention has all realized two-way magnetization in each switch periods, has improved the utilance of magnetic core of transformer.
(4) to have power conversion progression few in the present invention, bidirectional power flow, and the advantage such as output filter front voltage spectral characteristic is good, thereby improve conversion efficiency and power density, reduce volume and weight.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is the circuit topological structure figure of high frequency isolation type half-bridge five-electrical level inverter of the present invention.
Fig. 2 is the circuit topology figure of high frequency isolation type half-bridge bridge-type five-electrical level inverter of the present invention.
Fig. 3 is the circuit topology figure of high frequency isolation type half-bridge all-wave five-electrical level inverter of the present invention.
Embodiment
In conjunction with Fig. 1 ~ Fig. 3: a kind of half-bridge five-electrical level inverter of the present invention, the positive pole of the first input capacitance C1, the drain electrode of the first power switch tube S 1 links to each other with the negative electrode of the first diode D1, the negative pole of the second input capacitance C2, the source electrode of the 4th power switch tube S 4 links to each other with the anode of the 4th diode D4, the negative pole of the first input capacitance C1, the positive pole of the second input capacitance C2, the negative electrode of the drain electrode of the 8th power switch tube S 8 and the 8th diode D8 connects together, the source electrode of the 7th power switch tube S 7 connects, the source electrode of the 8th power switch tube S 8, the anode of the anode of the 7th diode D7 and the 8th diode D8 connects together, the source electrode of the first power switch tube S 1 is connected in the drain electrode of the second power switch tube S 2, the anode of the drain electrode of the 5th power switch tube S 5 and the first diode D1, the drain electrode of the 5th power switch tube S 5 connects the negative electrode with the 5th diode D5, the drain electrode of the second power switch tube S 2 connects the negative electrode with the second diode D2, the source electrode of the 5th power switch tube S 5, the anode of the 5th diode D5, the negative electrode of the 7th diode D7, the drain electrode of the 7th power switch tube S 7, the negative electrode of the drain electrode of the 6th power switch tube S 6 and the 6th diode D6 connects together, the source electrode of the second power switch tube S 2, the anode of the second diode D2, the negative electrode of the drain electrode of the 3rd power switch tube S 3 and the 3rd diode D3 connects together, the source electrode of the 3rd power switch tube S 3, the anode of the 3rd diode D3, the source electrode of the 6th power switch tube S 6, the anode of the 6th diode D6, the negative electrode of the drain electrode of the 4th power switch tube S 4 and the 4th diode D4 connects together, the negative pole of the positive pole of the first input capacitance C1 and the second input capacitance C2 is respectively the two ends of input DC power, and the drain electrode of the source electrode of the second power switch tube S 2 and the 7th power switch tube S 7 is respectively the two ends of output AC.
A kind of high frequency isolation type half-bridge five-electrical level inverter that uses the half-bridge five-electrical level inverter, by the input DC power 1 that connects successively, high-frequency inverter, high frequency transformer 3, frequency converter, output filter 5, output AC load 6 consists of, described high-frequency inverter is half-bridge five-electrical level inverter 2, wherein, the positive pole of input DC power 1 is connected with the positive pole of half-bridge five-electrical level inverter 2, the negative pole of input DC power 1 is connected with the negative pole of half-bridge five-electrical level inverter 2, the output of half-bridge five-electrical level inverter 2 is connected with the armature winding of high frequency transformer 3, the secondary winding of high frequency transformer 3 is connected with the input of frequency converter, the output of frequency converter links to each other with the input of output filter 5, and the output of output filter 5 links to each other with output AC load 6.
A kind of high frequency isolation type half-bridge bridge-type five-electrical level inverter, described frequency converter is full-bridge type frequency converter 4, the drain electrode of the Same Name of Ends of the first secondary winding N2 of high frequency transformer 3 and the 9th power switch tube S 9 of described full-bridge type frequency converter 4, the negative electrode of the 9th diode D9, the drain electrode of the 11 power switch tube S 11, the negative electrode of the 11 diode D11 connects together, the source electrode of the 9th power switch tube S 9 of described full-bridge type frequency converter 4, the anode of the 9th diode D9, the source electrode of the tenth power switch tube S 10, the anode of the tenth diode D10 connects together, the drain electrode of the tenth power switch tube S 10 of described full-bridge type frequency converter 4, the negative electrode of the tenth diode D10, the drain electrode of the 13 power switch tube S 13, the negative electrode of the 13 diode D13 connects together, the source electrode of the 13 power switch tube S 13 of described full-bridge type frequency converter 4, the anode of the 13 diode D13, the source electrode of the 14 power switch tube S 14, the anode of the 14 diode D14 connects together, the drain electrode of the non-same polarity of the first secondary winding N2 of high frequency transformer 3 and the 14 power switch tube S 14 of described full-bridge type frequency converter 4, the negative electrode of the 14 diode D14, the drain electrode of the 16 power switch tube S 16, the negative electrode of the 16 diode D16 connects together, the source electrode of the 16 power switch tube S 16 of described full-bridge type frequency converter 4, the anode of the 16 diode D16, the source electrode of the 15 power switch tube S 15, the anode of the 15 diode D15 connects together, the drain electrode of the 15 power switch tube S 15 of described full-bridge type frequency converter 4, the negative electrode of the 15 diode D15, the drain electrode of the 12 power switch tube S 12, the negative electrode of the 12 diode D12 connects together, the source electrode of the 12 power switch tube S 12 of described full-bridge type frequency converter 4, the anode of the 12 diode D12, the source electrode of the 11 power switch tube S 11, the anode of the 11 diode D11 connects together, the 9th power switch tube S 9, the tenth power switch tube S 10 and the 9th diode D9, the tenth diode D10 consists of the first four-quadrant power switch tube S A, the 11 power switch tube S 11, the 12 power switch tube S 12 and the 11 diode D11, the 12 diode D12 consists of the second four-quadrant power switch tube S B, the 13 power switch tube S 13, the 14 power switch tube S 14 and the 13 diode D13, the 14 diode D14 consists of the 3rd four-quadrant power switch tube S C, the 15 power switch tube S 15, the 16 power switch tube S 16 and the 15 diode D15, the 16 diode D16 consists of the 4th four-quadrant power switch tube S D, and four four-quadrant power switch pipes consist of described full-bridge type frequency converter 4.
A kind of high frequency isolation type half-bridge all-wave five-electrical level inverter, described frequency converter is full wave type frequency converter 7, the Same Name of Ends of the second secondary winding N2' of high frequency transformer 3 links to each other with the drain electrode of the 17 power switch tube S 9' of described full wave type frequency converter 7 and the negative electrode of the 17 diode D9', the anode of the 17 diode D9' of described full wave type frequency converter 7, the source electrode of the 17 power switch tube S 9', the anode of the 18 diode D10', the source electrode of the 18 power switch tube S 10' connects together, the non-same polarity of the 3rd secondary winding N3 of high frequency transformer 3 links to each other with the drain electrode of the 19 power switch tube S 11' of described full wave type frequency converter 7 and the negative electrode of the 19 diode D11', the non-same polarity of the second secondary winding N2' of high frequency transformer 3 is connected in the Same Name of Ends of the 3rd secondary winding N3 of high frequency transformer 3, the anode of the 19 diode D11' of described full wave type frequency converter 7, the source electrode of the 19 power switch tube S 11', the anode of the 20 diode D12' and the source electrode of the 20 power switch tube S 12' connect together, the drain electrode of the 20 power switch tube S 12' of described full wave type frequency converter 7, the drain electrode of the 18 power switch tube S 10', the negative electrode of the 20 diode D12' and the negative electrode of the 18 diode D10' connect together, the 17 power switch tube S 9', the 18 power switch tube S 10' and the 17 diode D9', the 18 diode D10' consists of the May 4th quadrant power switch tube S A', the 19 rate switching tube S11', the 20 power switch tube S 12' and the 19 diode D11', the 20 diode D12' consists of the 6th four-quadrant power switch tube S B', and the May 4th quadrant power switch tube S A' and the 6th four-quadrant power switch tube S B' consist of described full wave type frequency converter 7.
Embodiment 1: in conjunction with Fig. 2, a kind of high frequency isolation type half-bridge five-electrical level inverter is applicable to the circuit topology of half-bridge bridge-type of the high-voltage inverted occasion of high frequency electrical isolation, it is the positive pole that the positive pole of the end of input DC power Ui is connected in the first input capacitance C1, the positive pole of the first input capacitance C1, the drain electrode of the first power switch tube S 1 links to each other with the negative electrode of the first diode D1, the negative pole of the second input capacitance C2, the source electrode of the 4th power switch tube S 4 links to each other with the anode of the 4th diode D4, the negative pole of the first input capacitance C1, the positive pole of the second input capacitance C2 connects, the negative electrode of the drain electrode of the 8th power switch tube S 8 and the 8th diode D8 connects together, the source electrode of the 7th power switch tube S 7 connects, the source electrode of the 8th power switch tube S 8, the anode of the anode of the 7th diode D7 and the 8th diode D8 connects together, the source electrode of the first power switch tube S 1 is connected in the drain electrode of the second power switch tube S 2, the anode of the drain electrode of the 5th power switch tube S 5 and the first diode D1, the drain electrode of the 5th power switch tube S 5 connects the negative electrode with the 5th diode D5, the drain electrode of the second power switch tube S 2 connects the negative electrode with the second diode D2, the source electrode of the 5th power switch tube S 5, the anode of the 5th diode D5, the negative electrode of the 7th diode D7, the drain electrode of the 7th power switch tube S 7, the negative electrode of the drain electrode of the 6th power switch tube S 6 and the 6th diode D6 connects together, the source electrode of the second power switch tube S 2, the anode of the second diode D2, the negative electrode of the drain electrode of the 3rd power switch tube S 3 and the 3rd diode D3 connects together, the source electrode of the 3rd power switch tube S 3, the anode of the 3rd diode D3, the source electrode of the 6th power switch tube S 6, the anode of the 6th diode D6, the negative electrode of the drain electrode of the 4th power switch tube S 4 and the 4th diode D4 connects together, the source electrode of the second power switch tube S 2 is connected in the Same Name of Ends of the former limit winding N1 of high frequency transformer, the drain electrode of the 7th power switch tube S 7 is connected in the non-same polarity of the former limit winding N1 of high frequency transformer 3, the drain electrode of the Same Name of Ends of the first secondary winding N2 of high frequency transformer 3 and the 9th power switch tube S 9 of full-bridge type frequency converter 4, the negative electrode of the 9th diode D9, the drain electrode of the 11 power switch tube S 11, the negative electrode of the 11 diode D11 connects together, the source electrode of the 9th power switch tube S 9 of full-bridge type frequency converter 4, the anode of the 9th diode D9, the source electrode of the tenth power switch tube S 10, the anode of the tenth diode D10 connects together, the drain electrode of the tenth power switch tube S 10 of full-bridge type frequency converter 4, the negative electrode of the tenth diode D10, the drain electrode of the 13 power switch tube S 13, the negative electrode of the 13 diode D13 connects together, the source electrode of the 13 power switch tube S 13 of full-bridge type frequency converter 4, the anode of the 13 diode D13, the source electrode of the 14 power switch tube S 14, the anode of the 14 diode D14 connects together, the drain electrode of the non-same polarity of the first secondary winding N2 of high frequency transformer 3 and the 14 power switch tube S 14 of full-bridge type frequency converter 4, the negative electrode of the 14 diode D14, the drain electrode of the 16 power switch tube S 16, the negative electrode of the 16 diode D16 connects together, the source electrode of the 16 power switch tube S 16 of full-bridge type frequency converter 4, the anode of the 16 diode D16, the source electrode of the 15 power switch tube S 15, the anode of the 15 diode D15 connects together, the drain electrode of the 15 power switch tube S 15 of full-bridge type frequency converter 4, the negative electrode of the 15 diode D15, the drain electrode of the 12 power switch tube S 12, the negative electrode of the 12 diode D12 connects together, the source electrode of the 12 power switch tube S 12 of full-bridge type frequency converter 4, the anode of the 12 diode D12, the source electrode of the 11 power switch tube S 11, the anode of the 11 diode D11 connects together.The drain electrode of the drain electrode of the tenth power switch tube S 10 is connected in the front end of filter inductance Lf, the rear end of filter inductance Lf is connected in the positive pole of filter capacitor Co, connect after the negative pole of the drain electrode of the 15 power switch tube S 15 and filter capacitor Co links to each other " ", the two termination AC load uo of filter capacitor Co.
Embodiment 2: in conjunction with Fig. 3, a kind of high frequency isolation type half-bridge five-electrical level inverter is applicable to the circuit topology of half-bridge full wave type of the high-voltage inverted occasion of high frequency electrical isolation, it is the positive pole that the positive pole of the end of input DC power Ui is connected in the first input capacitance C1, the positive pole of the first input capacitance C1, the drain electrode of the first power switch tube S 1 links to each other with the negative electrode of the first diode D1, the negative pole of the second input capacitance C2, the source electrode of the 4th power switch tube S 4 links to each other with the anode of the 4th diode D4, the negative pole of the first input capacitance C1, the positive pole of the second input capacitance C2 connects, the negative electrode of the drain electrode of the 8th power switch tube S 8 and the 8th diode D8 connects together, the source electrode of the 7th power switch tube S 7 connects, the source electrode of the 8th power switch tube S 8, the anode of the anode of the 7th diode D7 and the 8th diode D8 connects together, the source electrode of the first power switch tube S 1 is connected in the drain electrode of the second power switch tube S 2, the anode of the drain electrode of the 5th power switch tube S 5 and the first diode D1, the drain electrode of the 5th power switch tube S 5 connects the negative electrode with the 5th diode D5, the drain electrode of the second power switch tube S 2 connects the negative electrode with the second diode D2, the source electrode of the 5th power switch tube S 5, the anode of the 5th diode D5, the negative electrode of the 7th diode D7, the drain electrode of the 7th power switch tube S 7, the negative electrode of the drain electrode of the 6th power switch tube S 6 and the 6th diode D6 connects together, the source electrode of the second power switch tube S 2, the anode of the second diode D2, the negative electrode of the drain electrode of the 3rd power switch tube S 3 and the 3rd diode D3 connects together, the source electrode of the 3rd power switch tube S 3, the anode of the 3rd diode D3, the source electrode of the 6th power switch tube S 6, the anode of the 6th diode D6, the negative electrode of the drain electrode of the 4th power switch tube S 4 and the 4th diode D4 connects together, the source electrode of the second power switch tube S 2 is connected in the Same Name of Ends of the former limit winding N1 of high frequency transformer, the drain electrode of the 7th power switch tube S 7 is connected in the non-same polarity of the former limit winding N1 of high frequency transformer, the Same Name of Ends of the second secondary winding N2' of high frequency transformer links to each other with the drain electrode of the 17 power switch tube S 9' of full wave type frequency converter 7 and the negative electrode of the 17 diode D9', the anode of the 17 diode D9' of full wave type frequency converter, the source electrode of the 17 power switch tube S 9', the anode of the 18 diode D10', the source electrode of the 18 power switch tube S 10' connects together, the non-same polarity of the 3rd secondary winding N3 of high frequency transformer 3 links to each other with the drain electrode of the 19 power switch tube S 11' of full wave type frequency converter and the negative electrode of the 19 diode D11', the non-same polarity of the second secondary winding N2' of high frequency transformer 3 is connected in the Same Name of Ends of the 3rd secondary winding N3 of high frequency transformer 3, the anode of the 19 diode D11' of full wave type frequency converter 7, the source electrode of the 19 power switch tube S 11', the anode of the 20 diode D12' and the source electrode of the 20 power switch tube S 12' connect together, the drain electrode of the 20 power switch tube S 12' of full wave type frequency converter 7, the drain electrode of the 18 power switch tube S 10', the negative electrode of the 20 diode D12' and the negative electrode of the 18 diode D10' connect together, the drain electrode of the 18 power switch tube S 10' is connected in the front end of filter inductance Lf, the rear end of filter inductance Lf is connected in the positive pole of filter capacitor Co, connect after the non-same polarity of second secondary winding N2' of high frequency transformer 3 and the negative pole of filter capacitor Co link to each other " ", the two termination AC load uo of filter capacitor Co.
High frequency isolation type five level half-bridge inverters of the present invention adopt voltage-type list closed loop instantaneous values feedback control technology.Sampled voltage and sinusoidal voltage U with inverter output voltage uo
RefRelatively, this error voltage obtains error amplification signal U through behind the proportional and integral controller
e, this error signal more respectively with saw-toothed carrier U
T1, U
T2Hand over to cut to obtain respectively SPWM1, the SPWM2 signal, introducing benchmark sinusoidal voltage polar signal and error will be passed through the driving signal that a series of logical conversions have obtained each power switch pipe after amplifying the polarity of voltage signal again.Can realize the stable of inverter output and regulate by the duty ratio of regulating the SPWM signal.
Because inverter has the four-quadrant operation ability, therefore can be with perception, capacitive, resistive and rectified load.At an output voltage in the cycle, inverter has the work of respectively corresponding four quadrants of four kinds of mode of operations, each mode of operation ground topology all is equivalent to a Buck type high-frequency isolation converter, and the job order of inverter is also different under the different loading conditions.
Be applicable to the circuit topology of half-bridge full wave type of high-voltage inverted occasion of high frequency electrical isolation take high frequency isolation type half-bridge five-electrical level inverter as example, high frequency isolation type five level half-bridge inverters an output voltage in the cycle course of work as follows:
1) generation of the first level+Ui, power switch tube S 1 closure, S2 is closed, and S4 is closed, and S6 is closed.Power switch tube S 3 disconnects, and S5 disconnects, and S7 disconnects, and S8 disconnects.S9' conducting among the May 4th quadrant power switch tube S A', S10' turn-offs.The former limit winding N1-power switch tube S 6-power switch tube S 4-input DC power Ui consequent pole of loop input DC power Ui positive pole-power switch tube S 1-power switch tube S 2-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S9'-diode D10'-filter among the second secondary winding N2'-the May 4th quadrant power switch tube S A' of high frequency transformer 3-AC load ZL; The another kind of switch mode of the first level, power switch tube S 1 closure, S3 is closed, and S4 is closed, and S5 is closed.Power switch tube S 2 disconnects, and S6 disconnects, and S7 disconnects, and S8 disconnects.S11' conducting among the 6th four-quadrant power switch tube S B', S12' turn-offs.The former limit winding N1-power switch tube S 3-power switch tube S 4-input DC power Ui consequent pole of loop input DC power Ui positive pole-power switch tube S 1-power switch tube S 5-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S11'-diode D12'-filter among secondary winding N3-the 6th four-quadrant power switch tube S B' of high frequency transformer-AC load ZL.
2) generation of second electrical level+Ui/2, power switch tube S 1 closure, S2 is closed, and S7 is closed.Power switch tube S 3 disconnects, and S4 disconnects, and S5 disconnects, and S6 disconnects, and S8 disconnects.S9' conducting among the May 4th quadrant power switch tube S A', S10' turn-offs, and the former limit winding N1-power switch tube S 7-diode D2-input capacitance C1 negative pole of loop input capacitance C1 positive pole-power switch tube S 1-power switch tube S 2-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S9'-diode D10'-filter among the secondary winding N2'-the May 4th quadrant power switch tube S A' of high frequency transformer 3-AC load ZL; The another kind of switch mode of second electrical level, power switch tube S 3 closures, S4 is closed, and S8 is closed.Power switch tube S 1 disconnects, and S2 disconnects, and S5 disconnects, and S6 disconnects, and S7 disconnects.S11' conducting among the 6th four-quadrant power switch tube S B', S12' turn-offs.The former limit winding N1-power switch tube S 3-power switch tube S 4-input capacitance C2 negative pole of loop input capacitance C2 positive pole-power switch tube S 8-diode D7-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S11'-diode D12'-filter among secondary winding N3-the 6th four-quadrant power switch tube S B' of high frequency transformer-AC load ZL.
3) generation of the third level 0, power switch tube S 2 closures.Power switch tube S 1 disconnects, and S3 disconnects, and S4 disconnects, and S5 disconnects, and S6 disconnects, and S7 disconnects, and S8 disconnects.S9' conducting among the May 4th quadrant power switch tube S A', S10' turn-offs, and power loop switching tube S2-transformer primary side winding N1-diode D5 is arranged this moment.S9'-diode D10'-filter among the secondary winding N2'-the May 4th quadrant power switch tube S A' of high frequency transformer 3-AC load ZL forms continuous current circuit; The another kind of switch mode of the third level, power tube switch S 3 closures.Power switch tube S 1 disconnects, and S2 disconnects, and S4 disconnects, and S5 disconnects, and S7 disconnects, and S8 disconnects.S11' conducting among the 6th four-quadrant power switch tube S B', S12' turn-offs.The former limit winding N1-power switch tube S 3-diode D6 of loop high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms continuous current circuit by the S11'-diode D12'-filter among the 3rd secondary winding N3-the 6th four-quadrant power switch tube S B' of transformer-AC load ZL.
4) generation of the 4th kind of level-Ui/2, power switch tube S 1 closure, S2 is closed, and S7 is closed.Power switch tube S 3 disconnects, and S4 disconnects, and S5 disconnects, and S6 disconnects, and S8 disconnects.S12' conducting among the 6th four-quadrant power switch tube S B', S11' turn-offs, and the loop input capacitance C1 positive pole-former limit of power switch tube S 1-power switch tube S 2-high frequency transformer winding N1-power switch tube S 7-diode D8-input capacitance C1 negative pole is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S12'-diode D11'-filter among secondary winding N3-the 6th four-quadrant power switch tube S B' of high frequency transformer 3-AC load ZL; The another kind of switch mode of the 4th kind of level, power switch tube S 3 closures, S4 is closed, and S8 is closed.Power switch tube S 1 disconnects, and S2 disconnects, and S5 disconnects, and S6 disconnects, and S7 disconnects.S10' conducting among the May 4th quadrant power switch tube S A', S9' turn-offs.The former limit winding N1-power switch tube S 3-power switch tube S 4-input capacitance C2 negative pole of loop input capacitance C2 positive pole-power switch tube S 8-diode D7-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S10'-diode D9'-filter among the secondary winding N2'-the May 4th quadrant power switch tube S A' of high frequency transformer-AC load ZL.
5) generation of the 5th kind of level-Ui, power switch tube S 1 closure, S2 is closed, and S4 is closed, and S6 is closed.Power switch tube S 3 disconnects, and S5 disconnects, and S7 disconnects, and S8 disconnects.S12' conducting among the 6th four-quadrant power switch tube S B', S11' turn-offs.The former limit winding N1-power switch tube S 6-power switch tube S 4-input DC power Ui consequent pole of loop input DC power Ui positive pole-power switch tube S 1-power switch tube S 2-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S12'-diode D11-filter among secondary winding N3-the 6th four-quadrant power switch tube S B' of high frequency transformer-AC load ZL; The another kind of switch mode of the 5th kind of level, power switch tube S 1 closure, S3 is closed, and S4 is closed, and S5 is closed.Power switch tube S 2 disconnects, and S6 disconnects, and S7 disconnects, and S8 disconnects.S10' conducting among the May 4th quadrant power switch tube S A', S9' turn-offs.The former limit winding N1-power switch tube S 3-power switch tube S 4-input DC power Ui consequent pole of loop input DC power Ui positive pole-power switch tube S 1-power switch tube S 5-high frequency transformer 3 is arranged this moment.The energy of high frequency transformer 3 secondary induction forms the loop by the S10'-diode D9'-filter among the second secondary winding N2'-the May 4th quadrant power switch tube S A' of high frequency-AC load ZL.
The output AC voltage positive half period obtains first, second, and third kind of level at the output inductor front end.The output AC voltage negative half-cycle obtains the 3rd, the 4th and the 5th kind of level at the output inductor front end.The alternating current that contains these five kinds of level can obtain the reasonable ac output voltage of spectral characteristic through behind the filter.
Claims (4)
1. half-bridge five-electrical level inverter, it is characterized in that: the positive pole of the first input capacitance (C1), the drain electrode of the first power switch pipe (S1) links to each other with the negative electrode of the first diode (D1), the negative pole of the second input capacitance (C2), the source electrode of the 4th power switch pipe (S4) links to each other with the anode of the 4th diode (D4), the negative pole of the first input capacitance (C1), the positive pole of the second input capacitance (C2), the negative electrode of the drain electrode of the 8th power switch pipe (S8) and the 8th diode (D8) connects together, the source electrode of the 7th power switch pipe (S7) connects, the source electrode of the 8th power switch pipe (S8), the anode of the anode of the 7th diode (D7) and the 8th diode (D8) connects together, the source electrode of the first power switch pipe (S1) is connected in the drain electrode of the second power switch pipe (S2), the anode of the drain electrode of the 5th power switch pipe (S5) and the first diode (D1), the drain electrode of the 5th power switch pipe (S5) connects the negative electrode with the 5th diode (D5), the drain electrode of the second power switch pipe (S2) connects the negative electrode with the second diode (D2), the source electrode of the 5th power switch pipe (S5), the anode of the 5th diode (D5), the negative electrode of the 7th diode (D7), the drain electrode of the 7th power switch pipe (S7), the negative electrode of the drain electrode of the 6th power switch pipe (S6) and the 6th diode (D6) connects together, the source electrode of the second power switch pipe (S2), the anode of the second diode (D2), the negative electrode of the drain electrode of the 3rd power switch pipe (S3) and the 3rd diode (D3) connects together, the source electrode of the 3rd power switch pipe (S3), the anode of the 3rd diode (D3), the source electrode of the 6th power switch pipe (S6), the anode of the 6th diode (D6), the negative electrode of the drain electrode of the 4th power switch pipe (S4) and the 4th diode (D4) connects together, the negative pole of the positive pole of the first input capacitance (C1) and the second input capacitance (C2) is respectively the two ends of input DC power, and the drain electrode of the source electrode of the second power switch pipe (S2) and the 7th power switch pipe (S7) is respectively the two ends of output AC.
2. high frequency isolation type half-bridge five-electrical level inverter that uses the half-bridge five-electrical level inverter, by the input DC power (1) that connects successively, high-frequency inverter, high frequency transformer (3), frequency converter, output filter (5), output AC load (6) consists of, it is characterized in that, described high-frequency inverter is half-bridge five-electrical level inverter (2), wherein, the positive pole of input DC power (1) is connected with the positive pole of half-bridge five-electrical level inverter (2), the negative pole of input DC power (1) is connected with the negative pole of half-bridge five-electrical level inverter (2), the output of half-bridge five-electrical level inverter (2) is connected with the armature winding of high frequency transformer (3), the secondary winding of high frequency transformer (3) is connected with the input of frequency converter, the output of frequency converter links to each other with the input of output filter (5), and the output of output filter (5) links to each other with output AC load (6).
3. according to a kind of high frequency isolation type half-bridge five-electrical level inverter that uses the half-bridge five-electrical level inverter according to claim 2, it is characterized in that, described frequency converter is full-bridge type frequency converter (4), the drain electrode of the Same Name of Ends of the first secondary winding (N2) of high frequency transformer (3) and the 9th power switch pipe (S9) of described full-bridge type frequency converter (4), the negative electrode of the 9th diode (D9), the drain electrode of the 11 power switch pipe (S11), the negative electrode of the 11 diode (D11) connects together, the source electrode of the 9th power switch pipe (S9) of described full-bridge type frequency converter (4), the anode of the 9th diode (D9), the source electrode of the tenth power switch pipe (S10), the anode of the tenth diode (D10) connects together, the drain electrode of the tenth power switch pipe (S10) of described full-bridge type frequency converter (4), the negative electrode of the tenth diode (D10), the drain electrode of the 13 power switch pipe (S13), the negative electrode of the 13 diode (D13) connects together, the source electrode of the 13 power switch pipe (S13) of described full-bridge type frequency converter (4), the anode of the 13 diode (D13), the source electrode of the 14 power switch pipe (S14), the anode of the 14 diode (D14) connects together, the drain electrode of the non-same polarity of the first secondary winding (N2) of high frequency transformer (3) and the 14 power switch pipe (S14) of described full-bridge type frequency converter (4), the negative electrode of the 14 diode (D14), the drain electrode of the 16 power switch pipe (S16), the negative electrode of the 16 diode (D16) connects together, the source electrode of the 16 power switch pipe (S16) of described full-bridge type frequency converter (4), the anode of the 16 diode (D16), the source electrode of the 15 power switch pipe (S15), the anode of the 15 diode (D15) connects together, the drain electrode of the 15 power switch pipe (S15) of described full-bridge type frequency converter (4), the negative electrode of the 15 diode (D15), the drain electrode of the 12 power switch pipe (S12), the negative electrode of the 12 diode (D12) connects together, the source electrode of the 12 power switch pipe (S12) of described full-bridge type frequency converter (4), the anode of the 12 diode (D12), the source electrode of the 11 power switch pipe (S11), the anode of the 11 diode (D11) connects together, the 9th power switch pipe (S9), the tenth power switch pipe (S10) and the 9th diode (D9), the tenth diode (D10) consists of the first four-quadrant power switch pipe (SA), the 11 power switch pipe (S11), the 12 power switch pipe (S12) and the 11 diode (D11), the 12 diode (D12) consists of the second four-quadrant power switch pipe (SB), the 13 power switch pipe (S13), the 14 power switch pipe (S14) and the 13 diode (D13), the 14 diode (D14) consists of the 3rd four-quadrant power switch pipe (SC), the 15 power switch pipe (S15), the 16 power switch pipe (S16) and the 15 diode (D15), the 16 diode (D16) consists of the 4th four-quadrant power switch pipe (SD), and four four-quadrant power switch pipes consist of described full-bridge type frequency converter (4).
4. a kind of high frequency isolation type half-bridge five-electrical level inverter that uses the half-bridge five-electrical level inverter according to claim 2, it is characterized in that, described frequency converter is full wave type frequency converter (7), the Same Name of Ends of the second secondary winding (N2') of high frequency transformer (3) links to each other with the drain electrode of the 17 power switch pipe (S9') of described full wave type frequency converter (7) and the negative electrode of the 17 diode (D9'), the anode of the 17 diode (D9') of described full wave type frequency converter (7), the source electrode of the 17 power switch pipe (S9'), the anode of the 18 diode (D10'), the source electrode of the 18 power switch pipe (S10') connects together, the non-same polarity of the 3rd secondary winding (N3) of high frequency transformer (3) links to each other with the drain electrode of the 19 power switch pipe (S11') of described full wave type frequency converter (7) and the negative electrode of the 19 diode (D11'), the non-same polarity of the second secondary winding (N2') of high frequency transformer (3) is connected in the Same Name of Ends of the 3rd secondary winding (N3) of high frequency transformer (3), the anode of the 19 diode (D11') of described full wave type frequency converter (7), the source electrode of the 19 power switch pipe (S11'), the anode of the 20 diode (D12') and the source electrode of the 20 power switch pipe (S12') connect together, the drain electrode of the 20 power switch pipe (S12') of described full wave type frequency converter (7), the drain electrode of the 18 power switch pipe (S10'), the negative electrode of the 20 diode (D12') and the negative electrode of the 18 diode (D10') connect together, the 17 power switch pipe (S9'), the 18 power switch pipe (S10') and the 17 diode (D9'), the 18 diode (D10') consists of the May 4th quadrant power switch pipe (SA'), the 19 rate switching tube (S11'), the 20 power switch pipe (S12') and the 19 diode (D11'), the 20 diode (D12') consists of the 6th four-quadrant power switch pipe (SB'), and the May 4th quadrant power switch pipe (SA') and the 6th four-quadrant power switch pipe (SB') consist of described full wave type frequency converter (7).
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