CN203405559U - Electronic load of electric energy feedback type - Google Patents
Electronic load of electric energy feedback type Download PDFInfo
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- CN203405559U CN203405559U CN201320118421.5U CN201320118421U CN203405559U CN 203405559 U CN203405559 U CN 203405559U CN 201320118421 U CN201320118421 U CN 201320118421U CN 203405559 U CN203405559 U CN 203405559U
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Abstract
The utility model relates to an electronic load of an electric energy feedback type, and the output end of the electronic load employs a large-current single-channel access mode. A main circuit mainly comprises a DC/DC conversion circuit, a DC/AC inverter circuit, and an alternating-current filter output circuit, wherein the DC/DC conversion circuit employs a phase-shifted full-bridge circuit to achieve the control of direct-current input, and enables a direct-current input voltage to rise. In order to adapt to large-current input, a switching element is formed by the parallel connection of a plurality of MOSFETs. The DC/DC conversion circuit is connected with the DC/AC inverter circuit through a direct-current bus. The DC/AC inverter circuit employs a single-phase full-bridge inverter circuit to control an alternating-current output current, so as to stabilize the voltage of the direct-current bus. The alternating current is fed back to a power grid in a unit power factor. The DC/AC inverter circuit employs an IGBT module as a power device. The alternating-current filter circuit can employ an LC low-pass filter circuit, so as to eliminate the higher harmonic in an output current of the DC/AC inverter circuit, and improve the quality of on-grid electric energy.
Description
Technical field
The utility model relates to electric and electronic technical field, espespecially relate to a kind of single channel wide region input, the grid-connected electric energy feedback type electronic load of high-power single-phase, its electric discharge that can be widely used in burn-in test, accumulator and other direct current cabinets of various power supplys is safeguarded, plays the effect that energy reclaims, recycles.
Background technology
Various direct supplys, large-capacity battery, in research and development production run and before dispatching from the factory, all will carry out burn-in test with electric property and the quality of check product.At present, most of burn-in test is also being used the energy-dissipating type devices such as resistance as load, and such load is all converted into thermal energy consumption by electric energy, causes mass energy waste.Meanwhile, traditional energy-dissipating type load also exists parameter cannot regulate continuously, vary with temperature the shortcomings such as large and thermal value is large, bulky.
Along with energy crisis is deepened, environment goes from bad to worse, people are more and more higher to the requirement of energy-conserving and environment-protective.Relatively traditional energy-dissipating type load, the superiority of electric energy feedback type electronic load is apparent, and up to the present why this load be not also used widely, and main cause is:
(1) versatility is bad, of a great variety due to power supply to be measured, supply voltage output from several volts to kilovolt, output current is from several peaces to peaces up to a hundred, develops a kind of more commonly, the electric energy feedback type electronic load that can adapt to various application occasions is a difficult point;
(2) overall efficiency is not high, overall efficiency is an important performance indexes of electric energy feedback type electronic load, in the application scenario of many low-voltage, high-current inputs, need to reasonably select circuit topology, control mode and installation method, under the prerequisite that guarantees system reliability, improve overall efficiency as far as possible;
(3) cost is high; because electric energy feedback type electronic load is grid type equipment; comprise DC/DC change-over circuit and DC/AC inverter circuit two large divisions; it controls relative complex, safeguard measure requires complete; for effectively reducing costs, the circuit design of complete machine, total arrangement and installation method have all been proposed to higher requirement.
About the electric energy feedback type electronic load of direct current input, existing major technique has:
1) publication number is CN101051071A, and denomination of invention is the invention of " multiple input path modular high frequency isolation single phase power feedback type electronic load ".In the electric energy feedback type electronic load of this Invention Announce, importation comprises some DC voltage modular converters, and the direct current input current that its individual module sucks is relatively little, is not suitable for direct centering, large power supply is carried out burn-in test;
2) publication number is CN101533074A, and denomination of invention is the invention of " a kind of Multi-channel wide voltage inputting electric energy feedback type electronic load ".In the electric energy feedback type electronic load of this Invention Announce, input DC/DC circuit comprises one or more unit input circuit, and this unit input circuit can be booster circuit, can be also reduction voltage circuit.From the claim 2 of this invention, can see, when its unit input circuit is booster type, employing be basic Boost Boost topology; When its unit input circuit is voltage-dropping type, what take is basic Buck buck topology.Visible, its single passage is also not suitable for being applied in the input occasion of low-voltage, high-current, and equally directly centering, large power supply are carried out burn-in test, and the feature of its wide voltage input is also to realize by a plurality of different input channels.
Existing electric energy feedback type electronic load ubiquity cost is high, overall efficiency is not high, and the problem such as the input current of single passage is little, input voltage range is narrow.Up to now, not yet find that a kind of single channel input current is large, wide input voltage range, system effectiveness single phase joining net type electric energy feedback type electronic load high and with low cost.
Utility model content
The purpose of this utility model is to solve the problem that existing electric energy feedback type electronic load single channel input current is little, input voltage range is narrow, overall efficiency is not high and cost is expensive.
In order to overcome the above problems, the utility model provides a kind of electric energy feedback type electronic load, it is in particular the high-power single-phase electric energy feedback type electronic load of single channel wide region input, this electronic load can be controlled the curtage of direct supply to be measured, can adapt to different application occasion, specifically be achieved through the following technical solutions.
A kind of electric energy feedback type electronic load, comprise DC/DC change-over circuit, DC/AC inverter circuit and ac filter circuit, wherein: the electrode input end of DC/DC change-over circuit connects direct current input positive terminal through D.C. contactor ZJ, negative input connects direct current input negative terminal by wire; The output terminal of DC/DC change-over circuit is connected by high voltage dc bus with the input end of DC/AC inverter circuit, and capacitor C is connected across between high voltage dc bus positive and negative electrode; The output terminal of DC/AC inverter circuit is connected with the input end of ac filter circuit, and the output terminal of ac filter circuit is connected with AC network by relay K 1, K2.
The DC/DC change-over circuit of described electric energy feedback type electronic load adopts full-bridge converter topology, described full-bridge converter topology is connected across direct current input capacitance C1 between direct current input positive and negative electrode, four brachium pontis Q1～Q4, high-frequency transformer T and full bridge rectifier D1～D4 by several and forms, and wherein four brachium pontis Q1～Q4 adopt a plurality of MOSFET to compose in parallel; Equal cross-over connection high-frequency absorption electric capacity between the drain electrode of lower each MOFET of brachium pontis of the source electrode of upper each MOSFET of brachium pontis and correspondence; The electrode input end of full-bridge converter and two output terminals consist of the Aluminium Radiator of three mutually insulateds respectively, forming two groups of MOSFET of brachium pontis on described full-bridge converter is all for example directly installed on same Aluminium Radiator by screw, two groups of MOSFET of lower brachium pontis are all for example directly installed on respectively on two other Aluminium Radiator by screw, described each heating radiator directly contacts with the drain electrode of each MOSFET on this heating radiator, forms electric path.
An output terminal of the secondary winding of described high-frequency transformer T is with centre tap, between secondary winding and full bridge rectifier input end, also has a winding transfer relay K4 who switches for secondary winding, often the opening of described winding transfer relay K4, normally closed contact are connected with output terminal and the centre tap of secondary winding respectively, the common port of described winding transfer relay K4 is connected with an input end of described full bridge rectifier, and another input end of described full bridge rectifier is connected with another output terminal of described secondary winding.
The DC/AC inverter circuit of described electric energy feedback type electronic load adopts single-phase full bridge inverter circuit, and the switching device of described inverter circuit adopts IGBT.
The ac filter circuit of described electric energy feedback type electronic load adopts LC or LLC or LCL filtering circuit, when adopting LC filtering circuit, one end of ac filter inductance L is connected with an output terminal of described DC/AC inverter circuit, the other end is connected with one end of ac filter capacitor C 6, and the other end of ac filter capacitor C 6 is connected with another output terminal of described DC/AC inverter circuit.
Described electric energy feedback type electronic load, also comprise and take the control circuit that DSP is core, described control circuit comprises produced by DSP two groups independently pwm signal generation circuits, wherein one group of pwm signal is connected to the grid of each MOSFET in described DC/DC change-over circuit after the isolation of DC/DC driving circuit is amplified, and other one group of pwm signal is connected to the gate pole of IGBT in described DC/AC inverter circuit after the isolation of DC/AC driving circuit is amplified.
The utility model contrast prior art at least has following innovative point:
DC/DC change-over circuit adopts the single channel input mode of large electric current, and main circuit adopts phase-shifting full-bridge translation circuit;
The changeable design of high-frequency transformer secondary winding in DC/DC change-over circuit;
Drain electrode as the MOSFET of DC/DC change-over circuit switching device directly contacts installation with heating radiator, improves overall efficiency;
DC/DC phase whole-bridging circuit and DC/AC single-phase full bridge inverter circuit are combined, adopt separately modularization mounting means.
The utility model contrast prior art has following remarkable advantage:
The large single pass input mode of electric current can directly be carried out burn-in test to powerful power supply, can be used as again general module simultaneously, is applied to multiple occasion;
DC/DC change-over circuit adopts phase whole-bridging circuit, and input current is large, overall efficiency is high, electromagnetic interference (EMI) is low;
By the switching of high-frequency transformer secondary winding, increase DC input voitage scope;
Device for power switching in DC/DC change-over circuit directly contacts installation with heating radiator, has reduced device temperature, has improved overall efficiency;
In DC/DC change-over circuit, utilize heating radiator as high-current conductor, simplified production process, reduced cost;
DC/DC change-over circuit and the modular mounting means of DC/AC inverter circuit have been simplified production process, and DC/AC inverter circuit adopts single-phase grid-connected, effectively reduces cost.
Accompanying drawing explanation
Figure 1A to Fig. 1 D is use-pattern schematic diagram of the present utility model;
Fig. 2 is the basic structure schematic diagram of embodiment of the present utility model;
Fig. 3 is the schematic diagram of the DC/DC change-over circuit of embodiment of the present utility model;
Fig. 4 is the control principle drawing of the DC/DC change-over circuit of embodiment of the present utility model;
Fig. 5 is DC/AC inverter circuit and the ac filter circuit schematic diagram of embodiment of the present utility model;
Fig. 6 is the control principle drawing of the DC/AC inverter circuit of embodiment of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Fig. 1
Referring to Fig. 1, for different application occasion, can adopt different use-patterns, wherein arrow indication energy flow direction.
As shown in Figure 1A, 24V/48V direct supply 20 output-current rating 100A, from AC network 10 power takings, the input of 24V/48V electric energy feedback type electronic load 30 can be directly introduced in its output, electric energy feedback type electronic load 30 is converted to the DC current of input with line voltage and frequently after the alternating current of homophase, is incorporated to single-phase electrical network together, thereby make most of electric energy feedback of input enter electrical network, reach the effect that power cycles is utilized.
As shown in Figure 1B, to carry flow equalizing function, can be directly miniwatt 24V/48V direct supply 20 in parallel
1, 20
2to 20
n, the DC bus forming after output-parallel can be introduced to the input of 24V/48V electric energy feedback type electronic load 30, thereby simultaneously to a plurality of DC power supplier 20
1, 20
2to 20
ncarry out burn-in test.
As shown in Figure 1 C, to not with flow equalizing function, cannot be directly direct supply 40 in parallel
1, 40
2to 40
n, can be by extra flow control module 50
1, 50
2to 50
nto each direct supply 40
1, 40
2to 40
noutput current control, the DC bus that forms after the output-parallel of flow control module is introduced the input of 24V/48V electric energy feedback type electronic load 30, thereby a plurality of directly small-power powers of parallel connection is carried out to burn-in test simultaneously.
As shown in Fig. 1 D, output current is greater than to the high-power 24V/48V direct supply 60 of 100A, can pass through many 24V/48V electric energy feedback type electronic loads 30
1, 30
2to 30
nmethod in parallel, carries out burn-in test to a large power supply.
Fig. 2
Referring to Fig. 2, this device mainly comprises DC/DC change-over circuit 201, DC/AC inverter circuit 202 and ac filter circuit 203; The control module (control circuit) 204 that the DSP of take is core mainly comprises input/output circuitry 213,214, the holding circuit 215 of simulating signal sample circuit 205, PWM driving signal output circuit and other switching values.
Single channel wide region of the present utility model operating procedure input, high-power single-phase electric energy feedback type electronic load is as follows:
Turn on-switch K4, the system power supply module 207 some roads of output system control power supplies, comprising two-way+5V power supply, respectively for giving control circuit 204 and the telecommunication circuit 208 that DSP is core; + 15V and-15V power supply Ge Yi road, supply with analog signal detection circuit 205; One tunnel+24V power supply, supplies with each relay, contactor coil and each cooling fan 209; Two-way+15V power supply, supplies with respectively the pwm signal driving circuit 212 of DC/DC change-over circuit 201 and the pwm signal driving circuit 206 of DC/AC inverter circuit 202.
Press and open/stop button 210, after DSP judges that according to the sampled value of analog quantity each operational factor is normal, the relay K 3 of closed pre-charge circuit, direct-current input power supplying 211 charges to the direct current input capacitance C1 in DC/DC change-over circuit 201 by pre-charge resistance R, when the voltage at two ends, D.C. contactor ZJ contact equates substantially, the coil of D.C. contactor ZJ obtains electric, its main contacts is closed, pre-charge-relay K3 disconnects, DSP exports pwm control signal, after driving circuit, in control DC/DC change-over circuit 201, device for power switching opens and disconnects.
Described DC/DC change-over circuit 201 can be controlled direct current input current, voltage swing by the adjusting of pwm signal dutycycle for the requirement of difference direct supply to be measured, DC bus-bar voltage is raise simultaneously.
Work as DC bus-bar voltage, the voltage at capacitor C two ends reaches after grid-connected threshold values, relay K 1, K2 closure, the output terminal of DC/AC inverter circuit 202 is connected with AC network 10, DSP exports pwm control signal, after driving circuit, controls the switching device in DC/AC inverter circuit 202.
Described DC/AC inverter circuit 202, by the adjusting of pwm signal dutycycle, is controlled DC bus-bar voltage and is stabilized in certain setting value, controls output current and line voltage with frequency homophase simultaneously, and the electric energy feedback of realizing unity power factor enters electrical network.
Two groups of pwm control signals that DSP produces cause respectively the control terminal of each power device by DC/DC driving circuit 212 and DC/AC driving circuit 206, two groups of pwm control signals are separate, by same DSP, produced.
Described ac filter circuit 203 is low-pass filter circuit, in order to the high order switch harmonic in filtering DC/AC inverter circuit 202 output currents, improves and network electric energy quality.
It is the DSP of TMS320F28335 that described DSP for example adopts American TI Company model;
The maximum switch current of described relay K 1, K2 main contacts is preferably 40A, and coil rating voltage is preferably 24V;
The maximum switch current of described relay K 3 main contactss is preferably 5A, and coil rating voltage is preferably 24V;
The resistance of described pre-charge resistance R is preferably 47 ohm;
The rated current of described D.C. contactor ZJ is preferably 200A;
The rated current of described fuse FU1 and FU2 is preferably 32A.
In addition, device also comprises some buttons, knob and display device (216-218) etc.
Fig. 3
Referring to Fig. 3, the change-over circuit of DC/DC shown in employing 201 is controlled direct current input current or voltage, and more than DC input voitage is increased to 400V, in order to described DC/AC inverter circuit 202 uses of rear class.
Direct current input capacitance C1 is used for stable DC input voltage, and after C1 charging, DC/DC drives Signal-controlled switch device Q1～Q4, and Q1～Q4 is composed in parallel by four MOSFET respectively, inputs the requirement of large electric current to meet direct current.
Described MOSFET is for example TO220 packaged type, the Aluminium Radiator of three mutually insulateds is directly connected by screw with the drain electrode of MOSFET mounted thereto, and as the anodal input link of described DC/DC change-over circuit 201 and two output lines, uses respectively.
High-frequency absorption capacitor C 2 and C3 are connected across between the drain electrode of pipe Q1, Q3 and the source electrode of corresponding lower pipe Q2, Q4, and the peak voltage producing while being used for absorbing high-speed switch improves overall efficiency to reduce electromagnetic interference (EMI) simultaneously.
The full-bridge change-over circuit consisting of Q1～Q4 is high-frequency ac current by the large current conversion of DC low-voltage, after high-frequency transformer T and the full bridge rectifier that is comprised of high-frequency rectification diode D1～D4, obtains the little electric current of high direct voltage on DC bus.The secondary winding of its medium/high frequency transformer T can switch by relay K 4, thereby makes DC/DC change-over circuit 201 can adapt to wider DC input voitage.
The electrochemical capacitor that described direct current input capacitance C1 is preferably 63V by 12 rated voltages composes in parallel;
The conducting resistance of described MOSFET is preferably 7.2mQ;
Described high-frequency absorption capacitor C 2 and C2 are preferably comprised of four CBB Capacitance parallel connections respectively, the withstand voltage 250V that is preferably of this CBB electric capacity;
The maximum switch current of described relay K 4 normally closed contacts is preferably 20A, and coil rating voltage is preferably 24V;
The reverse withstand voltage 1200V that is preferably of described high-frequency rectification diode D1～D4;
Fig. 4
Adopt the control method shown in Fig. 4, realize the closed-loop control of direct supply output current to be measured.
Direct supply output current command value i
dc_in *with feedback current value i
dc_ingenerated error value relatively, this error amount obtains a phase shift value after pi regulator 402, and this phase shift value generates PWM and drives signal after PWM generator 403 and driving circuit 404, thereby controls cut-offfing of switching device Q1～Q4 in DC/DC change-over circuit 201.After pi regulator 402 control parameter tunings are suitable, can control direct current input current is setting value.
Fig. 5
As shown in Figure 5, the single-phase full bridge inverter circuit that the Q5～Q8 of take is brachium pontis and the LC low-pass filter being formed by L, C6, direct current is converted into alternating current, Simultaneous Stabilization DC bus-bar voltage, and control output AC electric current and the same homophase frequently of ac grid voltage, realize unity power factor electric energy feedback to electrical network.
DC support capacitor C is connected across DC bus two ends to guarantee the power supply quality of rear class inverter circuit;
Q5～Q8 is four switching tubes of IGBT inside modules, after pwm signal drives, DC current is converted to high-frequency ac current;
Absorption Capacitance C5 is connected across between DC bus and places near IGBT module, is used for the peak voltage that absorbed power device produces when speed-sensitive switch;
The higher hamonic wave that the low-pass filter that L, C6 form is used in filtering high-frequency ac current;
Described DC support capacitor C is comprised of ten electrochemical capacitors, and the capacitance of described electrochemical capacitor is preferably 1000uF;
The withstand voltage 600V that is preferably of maximum of described IGBT module, maximum operating currenbt is preferably 50A;
The inductance value of described ac filter inductance L is preferably 1.5mH;
The capacitance of described ac filter capacitor C 6 is preferably 10uF;
Fig. 6
As shown in Figure 6, the method that adopts DC bus-bar voltage and ac output current dicyclo to control, realizes the control to DC bus-bar voltage and ac output current, wherein by the feedforward compensation of line voltage, in order to suppress the disturbance of line voltage to system, be beneficial to the stable of system.
DC bus-bar voltage setting value u
dc *with sampled value u
dcdifference through the PI of Voltage loop pi regulator 601, regulate, obtain the set-point i of ac output current amplitude
p *;
Line voltage u is by phase-locked frequency and the phase place that obtains line voltage, thus obtain and line voltage with the sinusoidal wave instruction sin of unit of homophase frequently
ω t, this value and i
p *multiply each other, obtain ac output current command value i
*, ac output current command value i
*after the fiducial value addition that the fiducial value obtaining after the PI of electric current loop pi regulator 602 regulates with the difference of sampled value i and voltage feed-forward control compensation obtain, through PWM maker 603, produce pwm control signal, this signal is through driving circuit 604 rear drive power device Q5～Q8, thereby realize the control to ac output current amplitude, frequency and phase place, to guarantee that system input, active power of output balance and ac output current are with unity power factor feedback grid.
Below by reference to the accompanying drawings embodiment of the present utility model is described, this explanation, only for helping to understand the technical solution of the utility model and implementing method, can not be interpreted as the restriction to the utility model scope.Protection domain of the present utility model is limited by the claims of enclosing, and any change on the utility model claim basis is all in protection domain of the present utility model.
Claims (11)
1. an electric energy feedback type electronic load, it is characterized in that, electronic load comprises DC/DC change-over circuit, DC/AC inverter circuit and ac filter circuit, wherein: the electrode input end of DC/DC change-over circuit connects direct current input positive terminal through D.C. contactor (ZJ), the negative input of DC/DC change-over circuit connects direct current input negative terminal by wire; The output terminal of DC/DC change-over circuit is connected by DC bus with the input end of DC/AC inverter circuit, and DC support electric capacity (C) is connected across between DC bus positive and negative electrode; The output terminal of DC/AC inverter circuit is connected with the input end of ac filter circuit, and the output terminal of ac filter circuit is connected with AC network by relay (K1, K2).
2. electric energy feedback type electronic load as claimed in claim 1, it is characterized in that, also comprise pre-charge circuit, pre-charge circuit is by being in series for connecting pre-charge-relay (K3) and the resistance (R) of charging circuit, and pre-charge circuit is in parallel with D.C. contactor (ZJ).
3. electric energy feedback type electronic load as claimed in claim 1, is characterized in that, also comprises input filter inductance, and input filter inductance is connected with D.C. contactor (ZJ).
4. electric energy feedback type electronic load as claimed in claim 1, is characterized in that, also comprises two fuses (FU1, FU2), connects respectively with relay (K1, K2).
5. electric energy feedback type electronic load as claimed in claim 1, is characterized in that, relay (K1, K2) is replaced by A.C. contactor.
6. electric energy feedback type electronic load as claimed in claim 1, it is characterized in that, DC/DC change-over circuit adopts full-bridge converter topology or push-pull topology, when adopting full-bridge converter topology, the direct current input capacitance (C1), four brachium pontis (Q1～Q4), high-frequency transformer (T) and the full bridge rectifier (D1～D4) that mainly by several, are connected across between direct current input positive and negative electrode form, wherein:
Four brachium pontis all adopt MOSFET as switching device, and two upper pipes (Q1, Q3) and the lower pipe (Q2, Q4) of full-bridge converter are composed in parallel by several MOSFET respectively;
Equal cross-over connection high-frequency absorption electric capacity (C2, C3) between the drain electrode of each MOFET of pipe (Q2, Q4) under the source electrode of each MOSFET of pipe (Q1, Q3) and corresponding formation in formation;
An electrode input end and two output terminals of full-bridge converter consist of the Aluminium Radiator of three mutually insulateds respectively, wherein upper pipe Q1, Q3 are directly installed on an Aluminium Radiator as electrode input end, lower pipe (Q2, Q4) is directly installed on two other Aluminium Radiator as two output terminals, the Aluminium Radiator of three mutually insulateds all directly contacts with the drain electrode of MOSFET mounted thereto, forms electric path;
An output terminal of the secondary winding of high-frequency transformer (T) is with centre tap, between secondary winding and full bridge rectifier input end, also has a winding transfer relay (K4) switching for secondary winding, often the opening of winding transfer relay (K4), normally closed contact are connected with centre tap with an output terminal of secondary winding respectively, the common port of winding transfer relay (K4) is connected with an input end of full bridge rectifier, and another input end of full bridge rectifier is connected with another output terminal of secondary winding.
7. electric energy feedback type electronic load as claimed in claim 1, is characterized in that, DC/AC inverter circuit adopts single-phase full bridge inverter circuit, and switching device adopts IGBT.
8. electric energy feedback type electronic load as claimed in claim 1, it is characterized in that, ac filter circuit adopts LC, LLC or LCL filtering circuit, when adopting LC filtering circuit, one end of ac filter inductance (L) is connected with an output terminal of DC/AC inverter circuit, the other end is connected with the one end of ac filter electric capacity (C6), and the other end of ac filter electric capacity (C6) is connected with another output terminal of DC/AC inverter circuit.
9. the electric energy feedback type electronic load as described in claim 1,2,3,4,5,6,7 or 8, it is characterized in that, also comprise for control system, start and stop opening/stop button, some for arrange the control button controlling parameter and select displaying contents, for arrange DC/DC change-over circuit input current knob is set, for showing state display module and some cooling fans of the running status of electric energy feedback type electronic load.
10. the electric energy feedback type electronic load as described in claim 1,2,3,4,5,6,7 or 8, is characterized in that, also comprises take the control circuit that DSP is core, and control circuit at least comprises:
Produced by DSP two groups pwm signal generation circuits independently, wherein one group of pwm signal is connected to the grid of each MOSFET in DC/DC change-over circuit after the isolation of DC/DC driving circuit is amplified, and other one group of pwm signal is connected to the gate pole of the IGBT in DC/AC inverter circuit after the isolation of DC/AC driving circuit is amplified;
One group of simulating signal sample circuit for each collection of simulant signal, conditioning, simulating signal comprises the DC input voitage of DC/DC change-over circuit, the direct current input current of DC/DC change-over circuit, the temperature of the ac output current of the DC voltage of DC bus, DC/AC inverter circuit, the alternating voltage of AC network and IGBT, each simulating signal accesses the simulating signal input pin of DSP analog-to-digital conversion module after sample circuit;
One group of control signal output circuit, control signal is produced by the output pin of the GPIO module of DSP, and each control signal is respectively used to control pre-charge-relay (K3), direct current input contactor (ZJ), winding transfer relay (K4), relay (K1 and K2), state display module, cooling fan after buffering, isolation;
One group of status signal input circuit, status signal at least comprises and opens/stop button state, controls key-press status;
One group of holding circuit, holding circuit at least comprises DC/DC change-over circuit input over-voltage over-current protection circuit, DC/DC Drive Protecting Circuit, DC bus overvoltage crowbar, DC/AC inverter circuit output overcurrent holding circuit, DC/AC Drive Protecting Circuit;
One group communication circuit, telecommunication circuit input is connected with the respective pins of the serial communication interface module of DSP, and after isolation, level translation, output is connected with serial communication terminal by wire.
11. electric energy feedback type electronic loads as claimed in claim 10, it is characterized in that, also comprise system power supply module, the input end of system power supply module is connected with AC network by switch, system power supply module is exported system control power supply ，Ge road, some roads power supply and is connected to and is take the control circuit that DSP is core by wire.
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| CN201320118421.5U CN203405559U (en) | 2013-03-15 | 2013-03-15 | Electronic load of electric energy feedback type |
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| CN104052079A (en) * | 2013-03-15 | 2014-09-17 | 余名俊 | Electric energy feedback type electronic load |
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| CN109459710A (en) * | 2018-12-29 | 2019-03-12 | 四川太牛电子科技有限公司 | A kind of exchange feedback auto-parallel electronic load and its working method |
| CN110957934A (en) * | 2019-12-17 | 2020-04-03 | 石家庄通合电子科技股份有限公司 | Transformer winding switching method and device |
| CN111865127A (en) * | 2019-04-29 | 2020-10-30 | 株洲中车时代电气股份有限公司 | Water surface power supply for underwater remote control robot and underwater remote control robot |
| CN112039345A (en) * | 2020-09-09 | 2020-12-04 | 西安科技大学 | Converter based on energy feedback device |
| CN113110242A (en) * | 2021-05-14 | 2021-07-13 | 中国核动力研究设计院 | High-efficiency analog quantity signal output device |
| CN113339281A (en) * | 2021-06-24 | 2021-09-03 | 中国原子能科学研究院 | Nuclear power supply electromagnetic pump parallel drive controller |
| CN114157161A (en) * | 2021-12-07 | 2022-03-08 | 南京志卓电子科技有限公司 | Be applied to rail vehicle's single-phase dc-to-ac converter |
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2013
- 2013-03-15 CN CN201320118421.5U patent/CN203405559U/en not_active Expired - Fee Related
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| CN104052079A (en) * | 2013-03-15 | 2014-09-17 | 余名俊 | Electric energy feedback type electronic load |
| CN103856039A (en) * | 2014-03-27 | 2014-06-11 | 湖南南车时代电动汽车股份有限公司 | Power conversion device of power supply line network of trolley bus and power driving system |
| CN105301519A (en) * | 2015-11-25 | 2016-02-03 | 邱三明 | Detachable and replaceable constant-current constant-voltage isolation electric energy feedback power aging device |
| CN105958467A (en) * | 2016-05-24 | 2016-09-21 | 合肥科威尔电源系统有限公司 | DC line impedance simulator and impedance analog control method therefor |
| CN105958467B (en) * | 2016-05-24 | 2018-08-03 | 合肥科威尔电源系统有限公司 | A kind of DC line impedance simulation device and its impedance simulation control method |
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| CN107884652A (en) * | 2017-11-30 | 2018-04-06 | 合肥科威尔电源系统有限公司 | A kind of high-pressure type direct current feed-back type electronic load control system |
| CN108696162A (en) * | 2018-04-26 | 2018-10-23 | 深圳市伊力科电源有限公司 | feedback type electronic load circuit and control method with ultra-wide input range |
| CN108957292A (en) * | 2018-07-23 | 2018-12-07 | 南京南瑞继保电气有限公司 | A kind of common type of power module testing circuit, system and test method |
| CN109459710A (en) * | 2018-12-29 | 2019-03-12 | 四川太牛电子科技有限公司 | A kind of exchange feedback auto-parallel electronic load and its working method |
| CN111865127A (en) * | 2019-04-29 | 2020-10-30 | 株洲中车时代电气股份有限公司 | Water surface power supply for underwater remote control robot and underwater remote control robot |
| CN110957934A (en) * | 2019-12-17 | 2020-04-03 | 石家庄通合电子科技股份有限公司 | Transformer winding switching method and device |
| CN112039345A (en) * | 2020-09-09 | 2020-12-04 | 西安科技大学 | Converter based on energy feedback device |
| CN113110242A (en) * | 2021-05-14 | 2021-07-13 | 中国核动力研究设计院 | High-efficiency analog quantity signal output device |
| CN113339281A (en) * | 2021-06-24 | 2021-09-03 | 中国原子能科学研究院 | Nuclear power supply electromagnetic pump parallel drive controller |
| CN113339281B (en) * | 2021-06-24 | 2022-07-01 | 中国原子能科学研究院 | Nuclear power supply electromagnetic pump parallel drive controller |
| CN114157161A (en) * | 2021-12-07 | 2022-03-08 | 南京志卓电子科技有限公司 | Be applied to rail vehicle's single-phase dc-to-ac converter |
| CN114157161B (en) * | 2021-12-07 | 2024-04-19 | 南京志卓电子科技有限公司 | Single-phase inverter applied to railway vehicle |
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