CN103887861A - Self-conversion charging inverter circuit and charging method - Google Patents
Self-conversion charging inverter circuit and charging method Download PDFInfo
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- CN103887861A CN103887861A CN201410153670.7A CN201410153670A CN103887861A CN 103887861 A CN103887861 A CN 103887861A CN 201410153670 A CN201410153670 A CN 201410153670A CN 103887861 A CN103887861 A CN 103887861A
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Abstract
The invention provides a self-conversion charging inverter circuit and a method for charging with the inverter circuit. A full bridge inverter circuit is used for achieving charging on a storage battery. The method comprises the steps that through a single chip microcomputer, a first power tube and a second power tube connected with a drain electrode and a positive electrode of the storage battery are controlled to be in a turned-off state; meanwhile, a third power tube and a fourth power tube are periodically controlled to be in a connecting-and-turned-off state, and accordingly voltages suitable for charging on the storage battery are obtained; and the output end of the inverter circuit is communicated with electric supply and then is used as a charging output end, namely continuous charging on the storage battery can be achieved. The full bridge inverter circuit is fully used for effective charging on the storage battery, the functions of the full bridge inverter circuit are expanded, the full bridge inverter circuit can be used to the maximum degree, circuit cost is lowered, circuit operation reliability is improved, interconversion of charging and inverting can be automatically achieved, and accordingly continuous power supply on a load is guaranteed.
Description
Technical field
The present invention relates to a kind of electric equipment, particularly a kind of circuit that can carry out again to charge in batteries inversion.
Background technology
Please refer to shown in Fig. 1, existing charging inversion circuit has generally comprised charging circuit and full bridge inverter two large divisions, wherein, the full-bridge circuit that full bridge inverter includes storage battery BAT, one chip microcomputer MCU, transformer T1 and is made up of four power tube Q1, Q2, Q3, Q4.Wherein, each power tube contains respectively parasitic diode VD1, VD2, VD3, VD4, and the input of charging circuit is electrically connected with city, and the output of charging circuit is connected with the positive and negative electrode of storage battery BAT; The common of contactor RELAY is connected with the feeder ear of load live wire, and the first normally opened contact of contactor RELAY is connected with the live wire of civil power, and the second normally opened contact of contactor RELAY is connected with the output of full bridge inverter.This circuit is work like this: at civil power under normal circumstances, one chip microcomputer MCU sends control signal to contactor RELAY, the common of contactor RELAY is communicated with the first normally opened contact, now, by the direct powering load of civil power, meanwhile, civil power is the direct voltage that is applicable to storage battery BAT charging 220V voltage transitions by charging circuit, thereby realizes the charging to storage battery BAT.Once civil power because of break down in have a power failure or power-off, one chip microcomputer MCU sends control signal to contactor RELAY, common and the first normally opened contact of contactor RELAY are disconnected, allow common be communicated with the second normally opened contact, one chip microcomputer MCU controls four power tube Q1, Q2, Q3, Q4 work, make storage battery BAT by inverter circuit converting direct-current power into alternating-current power, after transformer T1 boosts for load supplying.
The present inventor studies discovery, not yet has the correlation technique of utilizing inverter circuit to charge to storage battery at present.Because the components and parts of prior art are too much, not only cause the reliability of circuit working lower, and cost is higher, only take output voltage as 220V, the charging circuit of 10A electric current is example, the market price is at least 500 yuan, even reaches 1000 yuan.In order to reduce components and parts, improve circuit working reliability, reduce costs, if person skilled thinks directly to utilize in full-bridge circuit the parasitic diode on four power tube Q1, Q2, Q3, Q4 to use as full-bridge rectification diode, after diode rectification, to charge in batteries, be impracticable.Its reason is: to charge in batteries, except needs become alternating current direct current, also must effectively control charging current and charging voltage, must increase new control circuit for this reason.Suppose: at the storage battery that adopts 10 100AH, nominal charging voltage is for being less than 145V, and charging current is less than 30A.If by civil power 220V directly after four parasitic diode rectifications to this battery charging, charging voltage is about 290V so, this overtension, and charging current is at all uncontrollable, sometimes exceed 30A, even considerably beyond 30A, reach the electric current of hundreds and thousands of A.Charging voltage is too high and charging current is excessive can directly cause the chemical substance in storage battery to be damaged, and causes storage battery electric leakage; Can cause storage battery overheated simultaneously, cause pole plate distortion, thereby cause battery damage, even occur blast, these damages are unrepairables.In a word, the too high and charging current of charging voltage is crossed conference and has a strong impact on the useful life of storage battery, not applicable.
Summary of the invention
For the aforementioned current technical problem of utilizing existing inverter circuit to charge to storage battery that not yet has, the invention provides a kind of novel charging inversion of conversion certainly circuit, it utilizes full bridge inverter to realize the function of charging and inversion, and can be at civil power between normal power-up and fault power-off, automatically realize the mutual conversion of charging and inversion, thereby guarantee the continued power to load.
The object of the invention is to be achieved through the following technical solutions:
A kind of from conversion charging inversion circuit, comprise inverter circuit, contactor line bag and electrical signal collection transformer; Wherein,
Described inverter circuit comprises the full-bridge circuit that storage battery, one chip microcomputer, common transformer, the first power tube, the second power tube, the 3rd power tube and the 4th power tube form; Described the first power tube contains the first parasitic diode, and the second power tube contains the second parasitic diode, and the 3rd power tube contains trixenie diode, and the 4th power tube contains the 4th parasitic diode; And described common transformer elementary is in series with parasitic leakage inductance, described parasitic leakage inductance comprises leakage inductance and the artificial leakage inductance of manufacturing of common transformer self;
Battery terminal negative is by current sampling resistor ground connection, battery positive voltage is all connected with the drain electrode of the first power tube, the drain electrode of the second power tube, the source electrode of the first power tube is connected with the drain electrode of the 3rd power tube, the source ground of the 3rd power tube, the source electrode of the second power tube is connected with the drain electrode of the 4th power tube, the source ground of the 4th power tube;
The first control signal output pin of one chip microcomputer is by contactor line bag ground connection, and the common of contactor line bag is connected with the live wire of civil power, and the normally opened contact of contactor line bag is as the feeder ear of load live wire;
The second control signal output pin of one chip microcomputer is connected with the grid of the first power tube, the 3rd control signal output pin is connected with the grid of the second power tube, the 4th control signal output pin is connected with the grid of the 3rd power tube, and the 5th control signal output pin is connected with the grid of the 4th power tube; The grounding leg ground connection of one chip microcomputer, cell voltage sampling pin is connected with the positive pole of storage battery;
The elementary one end of common transformer is connected with the source electrode of the first power tube, and the other end is connected with the source electrode of the second power tube by parasitic leakage inductance; The two ends that common transformer is secondary are also connected to filter capacitor, and secondary one end is connected with the zero line of civil power, and the other end is connected with the feeder ear of the load live wire of civil power;
One end of electrical signal collection primary is connected with the live wire of civil power, and the other end is connected with zero line, and one end of electrical signal collection transformer secondary output is connected with the signals collecting input pin of one chip microcomputer, the other end ground connection of electrical signal collection transformer secondary output.
Provided by the invention is work like this from conversion charging inversion circuit: in the time that one chip microcomputer has civil power by the detection of electrical signal collection transformer, one chip microcomputer sends control signal to contactor line bag, the common of contactor line bag is communicated with normally opened contact, now, civil power is directly load supplying; Meanwhile, civil power is input in inverter circuit by the secondary of common transformer, and storage battery is continued to charging effectively, and its operation principle will be described in detail in follow-up charging method.Once civil power because of line fault or other former thereby power-off, one chip microcomputer sends control signal to contactor line bag, common and the normally opened contact of contactor line bag are disconnected, then a time period must be postponed, to allow the electric energy in full bridge inverter be discharged completely within this time period, avoid burning out four power tubes in the time of inversion operating state, realize the object of protection power tube, the time period of this delay is extremely short; Afterwards, one chip microcomputer sends the control signal of inversion operating state to four power tubes, make the direct current of storage battery convert the needed alternating current of load to through full bridge inverter, common transformer, be load supplying again, because full bridge inverter belongs to existing mature technology, its operation principle has just no longer been described.When civil power is become again while having electricity condition by off-position, one chip microcomputer sends control signal to contactor line bag again, the common of contactor line bag is communicated with again with normally opened contact, now, civil power is again not only directly to load supplying, and the operating state of inverter circuit has become again the charged state of civil power to storage battery.Circulation and so forth, automatically makes inverter circuit conversion mutually between charging and inversion, has realized the object for load continued power.
Provided by the invention in conversion charging inversion circuit, save original charging circuit, only use full bridge inverter, thereby not only reduce the manufacturing cost of circuit, but also because the minimizing of a large amount of components and parts has reduced the incidence of fault significantly, further improve circuit reliability of operation.
The present invention is aforesaid from conversion charging inversion circuit owing to having adopted, thereby can make full use of full bridge inverter and realize the effective charging to storage battery, it has expanded the function of full bridge inverter, it is utilized to greatest extent, not only reduce circuit cost and improve circuit operational reliability, and can automatically realize the mutual conversion of charging with inversion, thereby guarantee the continued power to load.
The present invention also provides a kind of charging method from conversion charging inversion circuit, described from changing charging inversion circuit as previously mentioned, utilizes this inverter circuit to comprise the following steps the method for charge in batteries:
Described one chip microcomputer sends closing control signal by the second control signal output pin to the first power tube, and send closing control signal by the 3rd control signal output pin to the second power tube, make described the first power tube and the second power tube in closed condition; Meanwhile,
Described one chip microcomputer passes through the 4th control signal output pin to the 3rd power tube, and send identical pulse-width signal by the 5th control signal output pin to the 4th power tube, periodically control described the 3rd power tube and the 4th power tube conducting and close; And the output of inverter circuit and civil power are connected to the rear input as charging, can realize the lasting charging to storage battery.
Provided by the invention in the charging method of conversion charging inversion circuit, the mechanism that storage battery is continued effectively to charging is: supposition is take civil power as 220V, storage battery is 120V, elementary and the secondary turn ratio of common transformer is that 60:220 is example, civil power 220V becomes 60V alternating current after common transformer step-down, in the time that this 60V alternating current is positive half cycle, the current potential of the source electrode of the second power tube is higher than the current potential of the source electrode of the first power tube, if one chip microcomputer control the 3rd, the pulse-width signal of four power tubes is high potentials, so, the 3rd, four power tubes are in conducting state, because the maximum of alternating current 60V is lower than battery tension 120V, therefore, first, parasitic diode in two power tubes is in cut-off state, electric current can only pass through the parasitic leakage inductance of common transformer successively, the 4th power tube, the parasitic diode of the 3rd power tube, the primary coil of common transformer forms loop, now, the parasitic leakage inductance of common transformer is in energy storage state, when one chip microcomputer control the 3rd, when the pulse-width signal of four power tubes becomes electronegative potential from high potential, the 3rd, four power tubes become closed condition by conducting state immediately, in this mutation process, the primary coil of common transformer also produces induced electromotive force thereupon, the 60V alternating current of this induced electromotive force and common transformer itself superposes, thereby improve the current potential of the source electrode of the second power tube, the height of this current potential is relevant to the parasitic drain sensibility reciprocal of common transformer primary coil, in the time of design, can deliberately adjust the parasitic drain sensibility reciprocal of common transformer primary coil, make the current potential of source electrode of the second power tube now higher than the voltage 120V of storage battery, thereby locate to make second, the parasitic diode conducting of three power tubes, and first, the parasitic diode of four power tubes can only be in cut-off state, now, due to the effect of the parasitic leakage inductance of common transformer, electric current cannot be made zero immediately, electric current can only be through the parasitic leakage inductance of common transformer, after the parasitic diode of the second power tube, flow to the positive pole of storage battery, flowed back to again the primary coil of common transformer by the parasitic diode of the 3rd power tube by battery terminal negative, and then formation loop, thereby realize, storage battery is charged effectively.In like manner, in the time that 60V alternating current is negative half period, the current potential of the source electrode of the second power tube is lower than the current potential of the source electrode of the first power tube, if one chip microcomputer control the 3rd, the pulse-width signal of four power tubes is high potentials, so, the 3rd, four power tubes are in conducting state, because the maximum of alternating current 60V is lower than battery tension 120V, therefore, first, in two power tubes, parasitic diode is in cut-off state, electric current can only be successively through the 3rd power tube, the parasitic diode of the 4th power tube, the parasitic leakage inductance of common transformer, the primary coil of common transformer forms loop, now, the parasitic leakage inductance of common transformer is in energy storage state, when one chip microcomputer control the 3rd, when the pulse-width signal of four power tubes becomes electronegative potential from high potential, the 3rd, four power tubes become closed condition by conducting state immediately, in this mutation process, the primary coil of common transformer also produces induced electromotive force thereupon, the 60V alternating current of this induced electromotive force and common transformer itself superposes, thereby improve the current potential of the source electrode of the first power tube, this current potential is higher than the voltage 120V of storage battery, thereby make first, the parasitic diode conducting of four power tubes, and second, the parasitic diode of three power tubes can only be in cut-off state, now, electric current can only flow to through the parasitic diode of the first power tube the positive pole of storage battery, returned again the primary coil of common transformer through the parasitic drain induced current of common transformer by the parasitic diode of the 4th power tube by negative pole, and then formation loop, realize storage battery is charged effectively.So periodically reciprocation cycle, realizes storage battery effectively charging constantly.
In the charging method of conversion charging inversion circuit, utilize first, second power tube of one chip microcomputer control in closed condition provided by the invention; Meanwhile, one chip microcomputer sends pulse-width signal and periodically controls the 3rd, the 4th power tube in conducting and closed condition, and the output of inverter circuit and civil power are connected to the rear input as charging, can realize the lasting charging to storage battery.
Accompanying drawing explanation
Fig. 1 is the charging inversion circuit equivalent conspectus that prior art provides;
Fig. 2 is the charging inversion of the conversion certainly circuit equivalent conspectus that the embodiment of the present invention provides;
Fig. 3 is the inverter circuit substitutional connection schematic diagram that charging method that the embodiment of the present invention provides is used.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Please refer to shown in Fig. 2, a kind of from conversion charging inversion circuit, comprise inverter circuit, contactor line bag RELAY and electrical signal collection transformer T2; Wherein,
Described inverter circuit comprises the full-bridge circuit that storage battery BAT, one chip microcomputer MCU, common transformer T1, the first power tube Q1, the second power tube Q2, the 3rd power tube Q3 and the 4th power tube Q4 form; Described the first power tube Q1 contains the first parasitic diode VD1, and the second power tube Q2 contains the second parasitic diode VD2, and the 3rd power tube Q3 contains trixenie diode VD3, and the 4th power tube Q4 contains the 4th parasitic diode VD4; And described common transformer T1 elementary contains parasitic leakage inductance L1, described parasitic leakage inductance L1 comprises leakage inductance and the artificial leakage inductance of manufacturing of common transformer T1 self, and described common transformer T1 can be equivalent to the ideal transformer upper parasitic leakage inductance of connecting;
Storage battery BAT negative pole is by current sampling resistor R ground connection, storage battery BAT is anodal to be all connected with the drain electrode of the first power tube Q1, the drain electrode of the second power tube Q2, the source electrode of the first power tube Q1 is connected with the drain electrode of the 3rd power tube Q3, the source ground of the 3rd power tube Q3, the source electrode of the second power tube Q2 is connected with the drain electrode of the 4th power tube Q4, the source ground of the 4th power tube Q4;
The first control signal output pin 2 of one chip microcomputer MCU is by contactor line bag RELAY ground connection, and the common of contactor line bag RELAY is connected with the live wire of civil power, and the normally opened contact of contactor line bag RELAY is as the feeder ear LR of load live wire;
The second control signal output pin 4 of one chip microcomputer MCU is connected with the grid of the first power tube Q1, the 3rd control signal output pin 6 is connected with the grid of the second power tube Q2, the 4th control signal output pin 8 is connected with the grid of the 3rd power tube Q3, and the 5th control signal output pin 10 is connected with the grid of the 4th power tube Q4; Grounding leg 27 ground connection of one chip microcomputer MCU, cell voltage sampling pin 5 is connected with the positive pole of storage battery BAT;
The elementary one end of common transformer T1 is connected with the source electrode of the first power tube Q1, and the other end is connected with the source electrode of the second power tube Q2 by parasitic leakage inductance L1; The two ends of common transformer T1 time level are also connected to filter capacitor C, and secondary one end is connected with the zero line N of civil power, and the other end is connected with the feeder ear LR of the load live wire of civil power;
The elementary one end of electrical signal collection transformer T2 is connected with the live wire L of civil power, the other end is connected with zero line N, one end of T2 level of electrical signal collection transformer is connected with the signals collecting input pin 1 of one chip microcomputer MCU, the other end ground connection of T2 level of electrical signal collection transformer.
Provided by the invention is work like this from conversion charging inversion circuit: in the time that one chip microcomputer MCU has civil power by electrical signal collection transformer T2 detection, one chip microcomputer MCU sends control signal to contactor line bag RELAY, the common of contactor line bag RELAY is communicated with normally opened contact, now, civil power is directly load supplying; Meanwhile, civil power is input in inverter circuit by the secondary of common transformer T1, and storage battery BAT is continued to charging effectively, and its operation principle will be described in detail in follow-up charging method.Once civil power because of line fault or other former thereby power-off, one chip microcomputer MCU sends control signal to contactor line bag RELAY, common and the normally opened contact of contactor line bag RELAY are disconnected, then a time period must be postponed, to allow the electric energy in full bridge inverter be discharged completely within this time period, avoid burning out four power tube Q1, Q2, Q3, Q4 in the time of inversion operating state, realize the object of protection power tube, the time period of this delay is extremely short; Afterwards, one chip microcomputer MCU sends the control signal of inversion operating state to four power tubes, make the direct current of storage battery BAT convert the needed alternating current of load to through full bridge inverter, common transformer T1, be load supplying again, because full bridge inverter belongs to existing mature technology, its operation principle has just no longer been described.When civil power is become again while having electricity condition by off-position, one chip microcomputer MCU sends control signal to contactor line bag RELAY again, the common of contactor line bag RELAY is communicated with again with normally opened contact, now, civil power is again not only directly to load supplying, and the operating state of inverter circuit has become again the charged state of civil power to storage battery BAT.Circulation and so forth, automatically makes inverter circuit conversion mutually between charging and inversion, has realized the object for load continued power.
Provided by the invention in conversion charging inversion circuit, save original charging circuit, only use full bridge inverter, thereby not only reduce the manufacturing cost of circuit, but also because the minimizing of a large amount of components and parts has reduced the incidence of fault significantly, further improve circuit reliability of operation.
Aforesaid from conversion charging inversion circuit owing to having adopted, thereby can make full use of full bridge inverter and realize the effective charging to storage battery, it has expanded the function of full bridge inverter, it is utilized to greatest extent, not only reduce circuit cost and improve circuit operational reliability, and can automatically realize the mutual conversion of charging with inversion, thereby guarantee the continued power to load.
As specific embodiment, when described common transformer T1 uses as inverter circuit, need to filter into sine wave by converted the high frequency square wave forming by power tube Q1～Q4, therefore in the time that manufacturing, deliberately manufactures common transformer T1 a part of leakage inductance.Particularly, please refer to the substitutional connection schematic diagram shown in Fig. 2, described common transformer T1 elementary contains parasitic leakage inductance L1, described parasitic leakage inductance L1 comprises leakage inductance and the artificial leakage inductance of manufacturing of common transformer T1 self, and described common transformer T1 specifically can be equivalent to the ideal transformer upper parasitic leakage inductance L1 that connects.In the present embodiment, inventor, through repeatedly drawing after research and analysis, is made as 0.5～10mH by the leakage inductance amount of described parasitic leakage inductance L1, can filter into sinusoidal wave by converted the high frequency square wave forming by power tube Q1～Q4 better thus; Simultaneously, by the leakage inductance amount of the elementary parasitic leakage inductance L1 containing of described common transformer T1 is adjusted, and then can optionally adjust charging voltage, make charging voltage meet the storage battery BAT voltage of arbitrary size, thereby avoid affecting because charging voltage is too high the useful life of storage battery.
In embodiments of the present invention, the effect of described current sampling resistor R is to make one chip microcomputer MCU obtain charging current signal; The effect of capacitor C is filtering, coordinates self inductance of common transformer to make LC filter, pulse-width signal PWM is filtered into sinusoidal wave; The model of described one chip microcomputer MCU can adopt STC12C5624AD, and the model of power tube Q1～Q4 can adopt IRFP4668.Certainly, those skilled in the art, on the basis of aforementioned embodiments, can also adopt and have the single-chip microprocessor MCU of same function and other model of power tube.
Please refer to shown in Fig. 3, the present invention also provides a kind of charging method from conversion charging inversion circuit, described from changing charging inversion circuit as previously mentioned, utilizes this inverter circuit to comprise the following steps the method for charge in batteries:
Described one chip microcomputer MCU sends closing control signal by the second control signal output pin 4 to the first power tube Q1, and send closing control signal by the 3rd control signal output pin 6 to the second power tube Q2, make described the first power tube Q1 and the second power tube Q2 in closed condition; Meanwhile,
Described one chip microcomputer MCU passes through the 4th control signal output pin 8 to the 3rd power tube Q3, and send identical pulse-width signal by the 5th control signal output pin 10 to the 4th power tube Q4, periodically control described the 3rd power tube Q3 and the 4th power tube Q4 conducting and close; And the output of inverter circuit and civil power are connected to the rear input as charging, can realize the lasting charging to storage battery.
Provided by the invention in the charging method of conversion charging inversion circuit, the mechanism that storage battery is continued effectively to charging is: supposition is take civil power as 220V, storage battery is 120V, elementary and the secondary turn ratio of common transformer T1 is that 60:220 is example, civil power 220V becomes 60V alternating current after common transformer T1 step-down, in the time that this 60V alternating current is positive half cycle, the current potential of the source electrode of the second power tube Q2 is higher than the current potential of the source electrode of the first power tube Q1, if one chip microcomputer MCU controls the 3rd power tube Q3, the pulse-width signal of the 4th power tube Q4 is high potential, so, the 3rd, four power tubes are in conducting state, because the maximum of alternating current 60V is lower than battery tension 120V, therefore, the first power tube Q1, parasitic diode VD1 in the second power tube Q2, VD2 is in cut-off state, electric current can only pass through the parasitic leakage inductance L1 of common transformer T1 successively, the 4th power tube Q4, the parasitic diode VD3 of the 3rd power tube Q3, the primary coil of common transformer T1 forms loop, now, the parasitic leakage inductance of common transformer T1 is in energy storage state, when one chip microcomputer MCU controls the 3rd power tube Q3, when the pulse-width signal of the 4th power tube Q4 becomes electronegative potential from high potential, the 3rd, four power tubes become closed condition by conducting state immediately, in this mutation process, the primary coil of common transformer T1 also produces induced electromotive force thereupon, the 60V alternating current of this induced electromotive force and common transformer T1 itself superposes, thereby improve the current potential of the source electrode of the second power tube Q2, the height of this current potential is relevant to the parasitic drain sensibility reciprocal of common transformer T1 primary coil, in the time of design, can deliberately adjust the parasitic drain sensibility reciprocal of common transformer T1 primary coil, make the current potential of source electrode of the second power tube Q2 now higher than the voltage 120V of storage battery BAT, thereby locate to make the second power tube Q2, the parasitic diode VD2 of the 3rd power tube Q3, VD3 conducting, and the first power tube Q1, the parasitic diode VD1 of the 4th power tube Q4, VD4 can only be in cut-off state, now, due to the effect of the parasitic leakage inductance L1 of common transformer, electric current cannot be made zero immediately, electric current can only be through the parasitic leakage inductance L1 of common transformer T1, after the parasitic diode VD2 of the second power tube Q2, flow to the positive pole of storage battery BAT, flowed back to again the primary coil of common transformer T1 by the parasitic diode VD3 of the 3rd power tube Q3 by storage battery BAT negative pole, and then formation loop, thereby realize, storage battery BAT is charged effectively.In like manner, in the time that 60V alternating current is negative half period, the current potential of the source electrode of the second power tube Q2 is lower than the current potential of the source electrode of the first power tube Q1, if one chip microcomputer MCU controls the 3rd power tube Q3, the pulse-width signal of the 4th power tube Q4 is high potential, so, the 3rd, four power tubes are in conducting state, because the maximum of alternating current 60V is lower than storage battery BAT voltage 120V, therefore, the first power tube Q1, parasitic diode VD1 in the second power Q2 pipe, VD2 is in cut-off state, electric current can only be successively through the 3rd power tube Q3, the parasitic diode VD4 of the 4th power tube Q4, the parasitic leakage inductance L1 of common transformer T1, the primary coil of common transformer T1 forms loop, now, the parasitic leakage inductance of common transformer T1 is in energy storage state, when one chip microcomputer MCU controls the 3rd power tube Q3, when the pulse-width signal of the 4th power tube Q4 becomes electronegative potential from high potential, the 3rd, four power tubes become closed condition by conducting state immediately, in this mutation process, the primary coil of common transformer T1 also produces induced electromotive force thereupon, the 60V alternating current of this induced electromotive force and common transformer T1 itself superposes, thereby improve the current potential of the source electrode of the first power tube Q1, this current potential is higher than the voltage 120V of storage battery BAT, thereby make the first power tube Q1, the parasitic diode VD1 of the 4th power tube Q4, VD4 conducting, and the second power tube Q2, the parasitic diode VD2 of the 3rd power tube Q3, VD3 can only be in cut-off state, now, electric current can only flow to through the parasitic diode VD1 of the first power tube Q1 the positive pole of storage battery BAT, flowed back to again the primary coil of common transformer T1 through the parasitic leakage inductance L1 of common transformer T1 by the parasitic diode VD4 of the 4th power tube Q4 by negative pole, and then formation loop, realize storage battery BAT is charged effectively.So periodically reciprocation cycle, realizes the effectively charging constantly to storage battery BAT.
In the charging method of conversion charging inversion circuit, utilize one chip microcomputer MCU to control the first power tube Q1, the second power tube Q2 in closed condition provided by the invention; Simultaneously, one chip microcomputer MCU sends pulse-width signal and periodically controls the 3rd power tube Q3, the 4th power tube Q4 in conducting and closed condition, and the output of inverter circuit and civil power are connected to the rear input as charging, can realize the lasting charging to storage battery BAT.
As specific embodiment, described pulse-width signal is square-wave signal, in this square-wave signal, makes the 3rd power tube (Q3) and the 4th power tube (Q4) conducting when high level, makes the 3rd power tube (Q3) and the 4th power tube (Q4) close when low level.Certainly, those skilled in the art are on the basis of previous embodiment, can also simply replace the structure of inverter circuit, while realizing in square-wave signal low level, make the 3rd power tube (Q3) and the 4th power tube (Q4) conducting, when high level, make the 3rd power tube (Q3) and the 4th power tube (Q4) close.
As specific embodiment, the pattern that described one chip microcomputer MCU sends pulse-width signal is PWM mode, is called for short PWM pattern, and the frequency of pulse-width signal can be determined according to actual needs.As a kind of execution mode; described pulse-width signal is under each switch periods; switching frequency to described the 3rd power tube (Q3) and the operation of the 4th power tube (Q4) is 1～100KHz; duty ratio is 0～80%; current increment can guarantee each power tube conducting thus time is enough little, circuit tripping operation while effectively preventing protective device startup.Particularly, from the defined formula U=L of inductance × (dI/dt), dI=(U/L) × dt, so enough short in the time,, in the sufficiently high situation of switching frequency, the variable quantity of I can be very not large yet, in the present invention, due to the frequency of operation of power switch pipe Q3 and Q4 is defined as to thousands of Hz, so under each switch periods, suppose take switching frequency as 10 KHz, duty ratio is 50%, inductance value is that 10mH is example, dI=(U/L) × dt=U/200, the variable quantity maximum of visible every primary current is only for being applied to 1/200 of voltage in stray inductance, therefore current increment when each power tube conducting is enough little, and can release energy and reduce electric current by parasitic diode again in the time that power tube disconnects, thereby circuit tripping operation can not cause protective device to start time.
Simultaneously; in the embodiment of the present invention, the working method of power tube is speed-sensitive switch; and electric current increases in the time of power tube conducting; in the time that power tube is closed, electric current reduces; therefore can be by adjust the duty ratio of each switch periods in the case of the point voltage value of line voltage sine; control current waveform in whole system and present sinusoidal cycle half; and reduction high order harmonic component; can prevent that thus secondary coil that common transformer T1 is connected with AC network is by short circuit, thereby cause the situation of protective device tripping operation to occur.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. from a conversion charging inversion circuit, it is characterized in that, comprise inverter circuit, contactor line bag (RELAY) and electrical signal collection transformer (T2); Wherein,
Described inverter circuit comprises the full-bridge circuit that storage battery (BAT), one chip microcomputer (MCU), common transformer (T1), the first power tube (Q1), the second power tube (Q2), the 3rd power tube (Q3) and the 4th power tube (Q4) form; Described the first power tube (Q1) contains the first parasitic diode (VD1), the second power tube (Q2) contains the second parasitic diode (VD2), the 3rd power tube (Q3) contains trixenie diode (VD3), and the 4th power tube (Q4) contains the 4th parasitic diode (VD4); And the elementary parasitic leakage inductance (L1) that contains of described common transformer (T1), described parasitic leakage inductance (L1) comprises leakage inductance and the artificial leakage inductance of manufacturing of common transformer (T1) self;
Storage battery (BAT) negative pole is by current sampling resistor (R) ground connection, storage battery (BAT) is anodal to be all connected with the drain electrode of the first power tube (Q1), the drain electrode of the second power tube (Q2), the source electrode of the first power tube (Q1) is connected with the drain electrode of the 3rd power tube (Q3), the source ground of the 3rd power tube (Q3), the source electrode of the second power tube (Q2) is connected with the drain electrode of the 4th power tube (Q4), the source ground of the 4th power tube (Q4);
The first control signal output pin (2) of one chip microcomputer (MCU) is by contactor line bag (RELAY) ground connection, the common of contactor line bag (RELAY) is connected with the live wire of civil power, and the normally opened contact of contactor line bag (RELAY) is as the feeder ear (LR) of load live wire;
The second control signal output pin (4) of one chip microcomputer (MCU) is connected with the grid of the first power tube (Q1), the 3rd control signal output pin (6) is connected with the grid of the second power tube (Q2), the 4th control signal output pin (8) is connected with the grid of the 3rd power tube (Q3), and the 5th control signal output pin (10) is connected with the grid of the 4th power tube (Q4); Grounding leg (27) ground connection of one chip microcomputer (MCU), cell voltage sampling pin (5) is connected with the positive pole of storage battery (BAT);
The elementary one end of common transformer (T1) is connected with the source electrode of the first power tube (Q1), and the other end is connected with the source electrode of the second power tube (Q2) by parasitic leakage inductance (L1); The two ends that common transformer (T1) is secondary are also connected to filter capacitor (C), and secondary one end is connected with the zero line (N) of civil power, and the other end is connected with the feeder ear (LR) of the load live wire of civil power;
The elementary one end of electrical signal collection transformer (T2) is connected with the live wire (L) of civil power, the other end is connected with zero line (N), the secondary one end of electrical signal collection transformer (T2) is connected with the signals collecting input pin (1) of one chip microcomputer (MCU), the other end ground connection that electrical signal collection transformer (T2) is secondary.
2. the charging inversion of conversion certainly circuit according to claim 1, is characterized in that, the leakage inductance amount of described parasitic leakage inductance (L1) is 0.5～10mH.
3. from a charging method for conversion charging inversion circuit, it is characterized in that, described from changing charging inversion circuit as shown in claim 1, utilize this inverter circuit to comprise the following steps the method for charge in batteries:
Described one chip microcomputer (MCU) sends closing control signal by the second control signal output pin (4) to the first power tube (Q1), and send closing control signal by the 3rd control signal output pin (6) to the second power tube (Q2), make described the first power tube (Q1) and the second power tube (Q2) in closed condition; Meanwhile,
Described one chip microcomputer (MCU) passes through the 4th control signal output pin (8) to the 3rd power tube (Q3), and send identical pulse-width signal by the 5th control signal output pin (10) to the 4th power tube (Q4), periodically control described the 3rd power tube (Q3) and the 4th power tube (Q4) conducting and close; And the output of inverter circuit and civil power are connected to the rear input as charging, can realize the lasting charging to storage battery.
4. the charging method from conversion charging inversion circuit according to claim 3, it is characterized in that, described pulse-width signal is square-wave signal, in this square-wave signal, when high level, make the 3rd power tube (Q3) and the 4th power tube (Q4) conducting, when low level, make the 3rd power tube (Q3) and the 4th power tube (Q4) close.
5. according to the charging method of certainly changing charging inversion circuit described in claim 3 or 4, it is characterized in that, described pulse-width signal is under each switch periods, switching frequency to described the 3rd power tube (Q3) and the operation of the 4th power tube (Q4) is 1～100KHz, and duty ratio is 0～80%.
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| CN201410153670.7A CN103887861A (en) | 2014-04-17 | 2014-04-17 | Self-conversion charging inverter circuit and charging method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09308134A (en) * | 1996-05-07 | 1997-11-28 | Shindengen Electric Mfg Co Ltd | Uninterruptible power supply unit |
| CN101604853A (en) * | 2009-05-22 | 2009-12-16 | 中国船舶重工集团公司第七一二研究所 | Battery charge and discharge device |
| CN201937494U (en) * | 2010-11-18 | 2011-08-17 | 佛山市新光宏锐电源设备有限公司 | Multiplexing inverse circuit for charging inverter |
| CN102185366A (en) * | 2011-05-31 | 2011-09-14 | 重庆汇韬电气有限公司 | Charging method applying inverter circuit, application of inverter circuit and self-conversion charging inverter circuit |
-
2014
- 2014-04-17 CN CN201410153670.7A patent/CN103887861A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09308134A (en) * | 1996-05-07 | 1997-11-28 | Shindengen Electric Mfg Co Ltd | Uninterruptible power supply unit |
| CN101604853A (en) * | 2009-05-22 | 2009-12-16 | 中国船舶重工集团公司第七一二研究所 | Battery charge and discharge device |
| CN201937494U (en) * | 2010-11-18 | 2011-08-17 | 佛山市新光宏锐电源设备有限公司 | Multiplexing inverse circuit for charging inverter |
| CN102185366A (en) * | 2011-05-31 | 2011-09-14 | 重庆汇韬电气有限公司 | Charging method applying inverter circuit, application of inverter circuit and self-conversion charging inverter circuit |
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Application publication date: 20140625 |