CN102969918B - Three-phase bridge type converter system and promptly descend short-circuit protection circuit - Google Patents
Three-phase bridge type converter system and promptly descend short-circuit protection circuit Download PDFInfo
- Publication number
- CN102969918B CN102969918B CN201210439518.6A CN201210439518A CN102969918B CN 102969918 B CN102969918 B CN 102969918B CN 201210439518 A CN201210439518 A CN 201210439518A CN 102969918 B CN102969918 B CN 102969918B
- Authority
- CN
- China
- Prior art keywords
- resistance
- nmos tube
- circuit
- diode
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of three-phase bridge type converter system, the mode of the AC signal adopting sense switch type DC/DC step-down isolated variable circuit secondary coil to export, realize the monitoring to d. c. voltage signal after rectification, the state of the AC signal that inverter controller exports according to switching mode DC/DC step-down isolated variable circuit secondary coil, automatically controls three-phase bridge type converter and enters urgent lower short-circuit mode.Three-phase bridge type converter system of the present invention, owing to being at switching mode DC/DC step-down isolated variable circuit secondary coil sample detecting abnormal electrical power supply, not by the impact of rectification circuit, three-phase bridge type converter can be made within very short time to respond abnormal electrical power supply, enter urgent lower short-circuit mode, effectively avoid the high-voltage capacitance in three-phase bridge type converter and power switch to be burnt.The invention also discloses a kind of urgent lower short-circuit protection circuit.
Description
Technical field
The present invention relates to a kind of power technology, particularly a kind of three-phase bridge type converter system and promptly descend short-circuit protection circuit.
Background technology
Be applied in EV(pure electric automobile) and HEV(hybrid vehicle) in inverter system, high-tension battery carrys out drive motors by three-phase bridge type converter (Inverter), realizes the control to three phase alternating current motor.
Three-phase bridge type converter system, comprises high-tension battery, switching mode DC/DC(DC-to-DC) isolated variable circuit, inverter controller, three-phase bridge type converter;
Three-phase bridge type converter, as shown in Figure 1, there are three brachium pontis, each brachium pontis comprises the upper brachium pontis power switch be connected in series mutually, lower brachium pontis power switch, the two ends up and down of each brachium pontis connect the positive and negative two ends of high-tension battery respectively, three outputs of three-phase bridge type converter lay respectively at brachium pontis power switch on each brachium pontis of each brachium pontis, the tie point of lower brachium pontis power switch, the open-minded of each power switch of brachium pontis is controlled by inverter controller, shutoff order, one group of amplitude just can be exported equal between three outputs of three-phase bridge type converter, frequency is equal, the three-phase electricity signal of phase 120 °.
Power switch bypass in each brachium pontis often distinguishes a fly-wheel diode in parallel, to play afterflow effect when bridge-type inverter exports and connects inductive load.
Power switch can be power transistor (GTR), gate level turn-off thyristor (GTO), power field effect pipe (PowerMOSFET), igbt (IGBT), integrated gate commutated thyristor (IGCT), SGCT (SGCT) etc.; Adopt IGBT as the power switch in brachium pontis in Fig. 1, collector electrode and an emitter two ends fly-wheel diode in parallel respectively of each IGBT in brachium pontis.
Described switching mode DC/DC step-down isolated variable circuit, as shown in Figure 2, comprises isolating transformer, rectification circuit;
The primary coil of described isolating transformer is used for meeting high direct voltage VDD_IN, high direct voltage VDD_IN is normally greater than the direct voltage of the inversion operating voltage VDD_P that described rectification circuit exports, such as high direct voltage VDD_IN is 30V, and inversion operating voltage VDD_P is 15V.In electric automobile, high direct voltage VDD_IN derives from the PEU(PowerElectronicUnit of electric automobile usually, electric power electronic module) in power management chip or DC/DC module.
The secondary coil of isolating transformer described in the input termination of described rectification circuit;
Described rectification circuit exports inversion operating voltage VDD_P to described inverter controller, as the operating voltage of inverter controller.
When cannot provide normal working voltage to inverter controller in described switching mode DC/DC step-down isolated variable circuit because failure and other reasons, the power switch that inverter controller will control in each brachium pontis of three-phase bridge type converter all turns off, only be connected in parallel on the fly-wheel diode conducting on the power switch side in brachium pontis, as shown in Figure 1.Now three phase alternating current motor works in coast (freewheeling) pattern.In this mode, three phase alternating current motor rotates will produce inverse electromotive force, electric energy flows to the DC bus side of three-phase bridge type converter from motor, and when rotating speed is higher, the high pressure of inverse electromotive force may make the high-voltage capacitance in three-phase bridge type converter and power switch overvoltage burn.
In order to avoid above-mentioned situation, need to detect the supply power voltage of inverter controller, and when detecting that the supply power voltage of inverter controller is abnormal, critical activity power supply ASCVDD is provided to inverter controller immediately by high-tension battery, and enter urgent lower short circuit (ASC) pattern by inverter controller control three-phase bridge type converter, upper brachium pontis power switch by each brachium pontis in three-phase bridge type converter all turns off, and lower brachium pontis power switch is all open-minded.Now circuit forms loop by two lower brachium pontis power switchs and diode, power consumption in the inside winding of motor, as shown in Figure 3.
A kind of conventional inverter controller supply power voltage monitoring method, that the amplitude of inversion operating voltage VDD_P that the rectification circuit detecting described switching mode DC/DC step-down isolated variable circuit by a supply power voltage testing circuit exports judges that whether the supply power voltage of inverter controller is abnormal, as shown in Figure 4.But, due to the existence of the rectifying and wave-filtering electric capacity in rectification circuit, the discharge time constant of circuit is larger, supply power voltage testing circuit needs the longer time (about having tens milliseconds) could make response to abnormal electrical power supply, described switching mode DC/DC step-down isolated variable circuit this means when normally can not provide operating voltage for inverter controller, three-phase bridge type converter will be in runaway condition all the time within a few tens of milliseconds, have very large to burn risk.
Summary of the invention
The technical problem to be solved in the present invention makes three-phase bridge type converter respond abnormal electrical power supply within very short time, enters urgent lower short-circuit mode, effectively avoid the high-voltage capacitance in three-phase bridge type converter and power switch to be burnt.
For solving the problems of the technologies described above, three-phase bridge type converter system provided by the invention, it comprises high-tension battery, switching mode DC/DC isolated variable circuit, inverter controller, three-phase bridge type converter, promptly descends short-circuit protection circuit;
Three-phase bridge type converter, there are three brachium pontis, each brachium pontis comprises the upper brachium pontis power switch be connected in series mutually, lower brachium pontis power switch two power switchs, the two ends up and down of each brachium pontis connect the positive and negative two ends of described high-tension battery respectively, and three outputs of three-phase bridge type converter lay respectively at the tie point of brachium pontis power switch on each brachium pontis, lower brachium pontis power switch;
The other fly-wheel diode in parallel respectively of each power switch in brachium pontis;
Described inverter controller, for controlling the opening of each power switch in three brachium pontis of described three-phase bridge type converter, turning off;
Described switching mode DC/DC step-down isolated variable circuit, comprises isolating transformer, rectification circuit;
The primary coil of described isolating transformer is used for connecing high direct voltage;
The secondary coil of described isolating transformer connects the input of described rectification circuit;
Described rectification circuit exports inversion operating voltage to described inverter controller;
Described urgent lower short-circuit protection circuit, comprises supply power voltage testing circuit, emergency service circuit;
Described supply power voltage testing circuit, the secondary coil of switching mode DC/DC step-down isolated variable circuit described in input termination, whether abnormal for judging the supply power voltage of described switching mode DC/DC step-down isolated variable circuit according to the output AC signal of secondary coil;
When supply power voltage is abnormal, it is true that described supply power voltage testing circuit exports power supply state signal, and when supply power voltage is normal, it is false that described supply power voltage testing circuit exports power supply state signal;
Described emergency service circuit, when power supply state signal is true time, carries out voltage transformation to described high-tension battery, exports critical activity voltage to described inverter controller, when power supply state signal is fictitious time, stops exporting critical activity voltage to described inverter controller;
Described inverter controller, when power supply state signal is true time, with described critical activity voltage for operating voltage, and three upper brachium pontis power switchs that output protection control signal controls described three-phase bridge type converter turn off, and three lower brachium pontis power switchs are open-minded; When power supply state signal is fictitious time, the inversion operating voltage exported with the rectification circuit of described switching mode DC/DC step-down isolated variable circuit is for operating voltage, and output services control signal controls three-phase bridge type converter output three-phase electricity signal.
Preferably, described high direct voltage derives from power management chip or the DC/DC module of electric automobile; Described high direct voltage higher than described inversion operating voltage, and is less than high-tension battery voltage.
Preferably, described inverter controller has normal-power mode, low-power consumption mode two kinds of mode of operations, and the power consumption of inverter controller under low-power consumption mode is less than the power consumption under normal-power mode;
Be true time at described power supply state signal, described inverter controller works in low-power consumption mode.
Preferably, the power switch in brachium pontis is igbt, collector electrode and an emitter two ends fly-wheel diode in parallel respectively of each igbt in brachium pontis.
For solving the problems of the technologies described above, the urgent lower short-circuit protection circuit be applied in above-mentioned three-phase bridge type converter system that present invention also offers, urgent lower short-circuit protection circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the first diode, the second diode, the 3rd diode, the 4th voltage stabilizing didoe, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first NMOS tube, the second NMOS tube, the 3rd NMOS tube, the 4th transistor;
Described first resistance, the second diode, for be serially connected in switching mode DC/DC step-down isolated variable circuit the grid of secondary coil with described first NMOS tube between, the negative terminal of the second diode is in the gate electrode side of the first NMOS tube;
Described second resistance, the first diode, for be serially connected in switching mode DC/DC step-down isolated variable circuit the grid of secondary coil with described first NMOS tube between, the anode of the first diode is in the gate electrode side of the first NMOS tube;
The resistance of described second resistance is greater than the resistance of the first resistance;
Described first electric capacity is connected on the grid of the first NMOS tube with between ground;
Between the negative terminal of the drain electrode that described 3rd resistance is connected on described first NMOS tube with described 3rd diode;
The source ground of described first NMOS tube, drain electrode connects the first pole of described 4th transistor;
Second pole ground connection of described 4th transistor;
Described 4th resistance is connected between the 3rd negative terminal extremely with described 3rd diode of described 4th transistor;
The anode of described 3rd diode, the inversion operating voltage that the rectification circuit for connecing described switching mode DC/DC step-down isolated variable circuit exports;
Described second electric capacity is connected on the 3rd of described 4th transistor the extremely with between ground;
Described 5th resistance is connected between the 3rd grid extremely with described second NMOS tube of described 4th transistor;
3rd pole of described 4th transistor is as power supply state signal output part;
Described 4th transistor is NPN triode or nmos switch pipe, the described first very base stage of NPN triode or the grid of nmos switch pipe, the described second very emitter of NPN triode or the source electrode of nmos switch pipe, the described 3rd very collector electrode of NPN triode or the drain electrode of nmos switch pipe;
The source ground of described second NMOS tube;
Between the grid of the drain electrode that described 6th resistance is connected on described second NMOS tube with described 3rd NMOS tube;
Described 7th resistance be connected on described 3rd NMOS tube grid, drain electrode between;
Described 4th voltage stabilizing didoe is connected on the grid of described 3rd NMOS tube with between ground, and the negative terminal of the 4th voltage stabilizing didoe is in the gate electrode side of the 3rd NMOS tube;
Described 8th resistance is connected on the drain electrode of described 3rd NMOS tube with between high-tension battery;
Described 3rd electric capacity is connected on the source electrode of described 3rd NMOS tube with between ground;
Between the negative terminal of the source electrode that described 9th resistance is connected on described 3rd NMOS tube with described 3rd diode;
Described 9th resistance with the tie point of the negative terminal of described 3rd diode, for exporting critical activity voltage to described inverter controller.
Preferably, the resistance of described second resistance is greater than 10 times of the resistance of the first resistance.
Three-phase bridge type converter system of the present invention and promptly descend short-circuit protection circuit; the mode of the AC signal adopting sense switch type DC/DC step-down isolated variable circuit secondary coil to export; realize the monitoring to d. c. voltage signal after rectification; the state of the AC signal that inverter controller exports according to switching mode DC/DC step-down isolated variable circuit secondary coil, automatically controls three-phase bridge type converter and enters urgent lower short-circuit mode.Three-phase bridge type converter system of the present invention, owing to being at switching mode DC/DC step-down isolated variable circuit secondary coil sample detecting abnormal electrical power supply, not by the impact of rectification circuit, three-phase bridge type converter can be made within very short time to respond abnormal electrical power supply, enter urgent lower short-circuit mode, effectively avoid the high-voltage capacitance in three-phase bridge type converter and power switch to be burnt.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing that will use required for the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is three-phase bridge type converter free-wheel mode schematic diagram;
Fig. 2 is switching mode DC/DC step-down isolated variable circuit diagram;
Fig. 3 is that three-phase bridge type converter enters urgent lower short-circuit mode schematic diagram;
Fig. 4 is conventional inverter controller supply power voltage monitoring method schematic diagram;
Fig. 5 is three-phase bridge type converter system schematic of the present invention;
Fig. 6 is the urgent lower short-circuit protection circuit schematic diagram in three-phase bridge type converter system one embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, carry out clear, complete description to the technical scheme in the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
Embodiment one
Three-phase bridge type converter system, as shown in Figure 5, comprises high-tension battery, switching mode DC/DC(DC-to-DC) isolated variable circuit, inverter controller, three-phase bridge type converter, promptly descend short-circuit protection circuit;
Three-phase bridge type converter, as shown in Figure 1, there are three brachium pontis, each brachium pontis comprises the upper brachium pontis power switch be connected in series mutually, lower brachium pontis power switch two power switchs, the two ends up and down of each brachium pontis connect the positive and negative two ends of described high-tension battery respectively, and three outputs of three-phase bridge type converter lay respectively at the tie point of brachium pontis power switch on each brachium pontis, lower brachium pontis power switch;
Described inverter controller, for controlling the opening of each power switch in three brachium pontis of three-phase bridge type converter, shutoff order, amplitude is equal, frequency is equal, the three-phase electricity signal of phase 120 ° to make to export one group between three of three-phase bridge type converter outputs;
The other fly-wheel diode in parallel respectively of each power switch in brachium pontis, to play afterflow effect when three-phase bridge type converter exports and connects inductive load;
Power switch in brachium pontis, can be power transistor (GTR), gate level turn-off thyristor (GTO), power field effect pipe (PowerMOSFET), igbt (IGBT), integrated gate commutated thyristor (IGCT), SGCT (SGCT) etc., adopt IGBT as the power switch in brachium pontis in Fig. 1, collector electrode and an emitter two ends fly-wheel diode in parallel respectively of each IGBT in brachium pontis;
Described switching mode DC/DC(DC-to-DC) step-down isolated variable circuit, as shown in Figure 2, comprise isolating transformer, rectification circuit;
The primary coil of described isolating transformer is used for meeting high direct voltage VDD_IN, high direct voltage VDD_IN is normally greater than the direct voltage of the inversion operating voltage VDD_P that described rectification circuit exports, such as high direct voltage VDD_IN is 30V, and inversion operating voltage VDD_P is 15V.In electric automobile, high direct voltage VDD_IN derives from the PEU(PowerElectronicUnit of electric automobile usually, electric power electronic module) in power management chip or DC/DC module;
The secondary coil of described isolating transformer connects the input of described rectification circuit;
Described rectification circuit exports inversion operating voltage VDD_P to described inverter controller;
Described urgent lower short-circuit protection circuit, comprises supply power voltage testing circuit, emergency service circuit;
Described supply power voltage testing circuit, the secondary coil of switching mode DC/DC step-down isolated variable circuit described in input termination, whether abnormal for judging the supply power voltage of described switching mode DC/DC step-down isolated variable circuit according to the output AC signal of secondary coil;
When supply power voltage is abnormal, it is true that described supply power voltage testing circuit exports power supply state signal DRV_ctrl, and when supply power voltage is normal, it is false that described supply power voltage testing circuit exports power supply state signal DRV_ctrl;
Described emergency service circuit, when power supply state signal DRV_ctrl is true time, voltage transformation is carried out to described high-tension battery, export critical activity voltage ASCVDD to described inverter controller, when power supply state signal DRV_ctrl is fictitious time, described emergency service circuit stops exporting critical activity voltage ASCVDD to described inverter controller;
Described inverter controller, when power supply state signal DRV_ctrl is true time, with described critical activity voltage ASCVDD for operating voltage, and three upper brachium pontis power switchs that output protection control signal controls described three-phase bridge type converter turn off, and three lower brachium pontis power switchs are open-minded; When power supply state signal DRV_ctrl is fictitious time, with described switching mode DC/DC(DC-to-DC) the inversion operating voltage VDD_P that exports of the rectification circuit of step-down isolated variable circuit is for operating voltage, and output services control signal controls three-phase bridge type converter exports three-phase electricity signal;
Preferably, described inverter controller has normal-power mode, low-power consumption mode two kinds of mode of operations, the power consumption of inverter controller under low-power consumption mode is less than the power consumption under normal-power mode, when power supply state signal DRV_ctrl is true (abnormal electrical power supply), described inverter controller works in low-power consumption mode.
Embodiment two
Based on embodiment one, described urgent lower short-circuit protection circuit, comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the first diode D1, the second diode D2, the 3rd diode D3, the 4th voltage stabilizing didoe VD, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the first NMOS tube M1, the second NMOS tube M2, the 3rd NMOS tube M3, the 4th transistor Q1;
Between the grid of the secondary coil that described first resistance R1, the second diode D2 are serially connected in described switching mode DC/DC step-down isolated variable circuit with described first NMOS tube M1, the negative terminal of the second diode D2 is in the gate electrode side of the first NMOS tube M1;
Between the grid of the secondary coil that described second resistance R2, the first diode D1 are serially connected in described switching mode DC/DC step-down isolated variable circuit with described first NMOS tube M1, the anode of the first diode D1 is in the gate electrode side of the first NMOS tube M1;
The resistance of described second resistance R2 is much larger than the resistance of the first resistance R1; Preferably the resistance of described second resistance R2 is greater than 10 times of the resistance of the first resistance R1;
Described first electric capacity C1 is connected on the grid of the first NMOS tube M1 with between ground;
Between the negative terminal of the drain electrode that described 3rd resistance R3 is connected on described first NMOS tube M1 with described 3rd diode D3;
The source ground of described first NMOS tube M1, drain electrode connects first pole of described 4th transistor Q1;
The second pole ground connection of described 4th transistor Q1;
Described 4th resistance R4 is connected between the 3rd negative terminal extremely with described 3rd diode D3 of described 4th transistor Q1;
The inversion operating voltage VDD_P of the rectification circuit output of switching mode DC/DC step-down isolated variable circuit described in the positive termination of described 3rd diode D3;
Described second electric capacity C2 is connected on the 3rd of described 4th transistor Q1 the extremely with between ground;
Described 5th resistance R5 is connected between the 3rd grid extremely with described second NMOS tube M2 of described 4th transistor Q1;
3rd pole of described 4th transistor Q1 as power supply state signal DRV_ctrl output, described 4th transistor Q1 the 3rd very low level time, power supply state signal DRV_ctrl is true, and during for high level, power supply state signal DRV_ctrl is false;
Described 4th transistor Q1 is NPN triode or nmos switch pipe; The described first very base stage of NPN triode or the grid of nmos switch pipe; The described second very emitter of NPN triode or the source electrode of nmos switch pipe; The described 3rd very collector electrode of NPN triode or the drain electrode of nmos switch pipe;
The source ground of described second NMOS tube M2;
Between the grid of the drain electrode that described 6th resistance R6 is connected on described second NMOS tube M2 with described 3rd NMOS tube M3;
Between the drain electrode of the grid that described 7th resistance R7 is connected on described 3rd NMOS tube M3 with described 3rd NMOS tube M3;
Described 4th voltage stabilizing didoe VD is connected on the grid of described 3rd NMOS tube M3 with between ground, and the negative terminal of the 4th voltage stabilizing didoe VD is in the gate electrode side of the 3rd NMOS tube M3;
Described 8th resistance R8 is connected on the drain electrode of described 3rd NMOS tube M3 with between high-tension battery;
Described 3rd electric capacity C3 is connected on the source electrode of described 3rd NMOS tube M3 with between ground;
Between the negative terminal of the source electrode that described 9th resistance R9 is connected on described 3rd NMOS tube M3 with described 3rd diode D3;
Described 9th resistance R9 with the tie point of the negative terminal of described 3rd diode D3, for exporting critical activity voltage ASCVDD to described inverter controller.
Urgent lower short-circuit protection circuit in embodiment two; when the AC signal SECSIDE of the secondary coil of switching mode DC/DC step-down isolated variable circuit is at positive half cycle; be that the first electric capacity C1 charges by described first resistance R1, the second diode D2; when negative half period; 3rd electric capacity C1 is discharged by described second resistance R2, the first diode D1; because the resistance of the second resistance R2 is much larger than the resistance of the first resistance R1, make the first electric capacity C1 in the discharge time constant of negative half period much larger than the charge constant at positive half cycle.
When described switching mode DC/DC step-down isolated variable circuit supply voltage is normal, the frequency of the AC signal SEC_SIDE of secondary coil and amplitude keep fixed value, and now the voltage at the first electric capacity C1 two ends is just always, and is greater than the cut-in voltage V of the first NMOS tube M1
gS_th, make the first NMOS tube M1 conducting, the 4th transistor Q1 is ended, the power supply state signal DRV_ctrl of the 3rd pole of the 4th transistor Q1 is high level (vacation);
When the 3rd pole power supply state signal DRV_ctrl of the 4th transistor Q1 is high level (vacation), the second NMOS tube M2 is also by conducting, and the loop that the second NMOS tube M2 conducting is formed can make high-tension battery at the gate-source voltage V of the 3rd NMOS tube M3
gSbe less than cut-in voltage V
gS_th, the 3rd NMOS tube M3 turns off, and high-tension battery HV stops providing critical activity voltage ASCVDD.
When described switching mode DC/DC step-down isolated variable circuit supply electric voltage exception, the frequency of the AC signal SEC_SIDE of secondary coil or amplitude will diminish, such as frequency reduces, now, first electric capacity C1 both end voltage is greater than the cut-in voltage of the first NMOS tube M1 at positive half cycle, be less than the cut-in voltage of the first NMOS tube M1 at negative half period, namely the first NMOS tube M1 switches back and forth between conducting and cut-off.In this case, the 4th transistor Q1 also switches thereupon back and forth, and because the charge constant of the second electric capacity C2 is much larger than discharge time constant, the power supply state signal DRV_ctrl that the 4th transistor Q1 the 3rd pole exports will remain low level (very); Meanwhile, the second NMOS tube M2 will end, and the voltage VGS that high-tension battery HV is formed at the grid source electrode of the 3rd NMOS tube M3 will be greater than cut-in voltage V
gS_th, make the 3rd NMOS tube M3 conducting, the 3rd voltage stabilizing didoe VD plays the effect of clamp critical activity voltage ASCVDD, and critical activity voltage ASCVDD equals the 3rd voltage stabilizing didoe VD clamping voltage and deducts the 3rd NMOS tube M3 cut-in voltage V
gS_th.
When the AC signal SEC_SIDE amplitude of described switching mode DC/DC step-down isolated variable circuit secondary coil is 0V, obvious first NMOS tube M1 cut-off, then the 4th transistor Q1 conducting, the power supply state signal DRV_ctrl that 4th transistor Q1 the 3rd pole exports will remain low level, now the second NMOS tube M2 cut-off, the voltage V that high-tension battery HV is formed at the grid source electrode of the 3rd NMOS tube M3
gScut-in voltage V will be greater than
gS_th, the 3rd NMOS tube M3 conducting, provides emergency service by high-tension battery HV, and by voltage-stabiliser tube VD2 clamp emergency service voltage ASCVDD.
Three-phase bridge type converter system of the present invention, the mode of the AC signal adopting sense switch type DC/DC step-down isolated variable circuit secondary coil to export, realize the monitoring to d. c. voltage signal after rectification, the state of the AC signal that inverter controller exports according to switching mode DC/DC step-down isolated variable circuit secondary coil, automatically controls three-phase bridge type converter and enters urgent lower short circuit (ASC) pattern.Three-phase bridge type converter system of the present invention, owing to being at switching mode DC/DC step-down isolated variable circuit secondary coil sample detecting abnormal electrical power supply, not by the impact of rectification circuit, three-phase bridge type converter can be made within very short time (tens microseconds) to respond abnormal electrical power supply, enter urgent lower short circuit (ASC) pattern, effectively avoid the high-voltage capacitance in three-phase bridge type converter and power switch to be burnt.In addition; three-phase bridge type converter system of the present invention; after abnormal electrical power supply being detected; inverter controller can work in low-power consumption mode; thus the consumption reduced power supply; the urgent lower short circuit (ASC) maintaining the longer time controls, thus makes the three-phase bridge type converter longer time remain on lower short-circuit protection state.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (8)
1. a three-phase bridge type converter system, is characterized in that, comprises high-tension battery, switching mode DC/DC step-down isolated variable circuit, inverter controller, three-phase bridge type converter, promptly descends short-circuit protection circuit;
Three-phase bridge type converter, there are three brachium pontis, each brachium pontis comprises the upper brachium pontis power switch be connected in series mutually, lower brachium pontis power switch two power switchs, the two ends up and down of each brachium pontis connect the positive and negative two ends of described high-tension battery respectively, and three outputs of three-phase bridge type converter lay respectively at the tie point of brachium pontis power switch on each brachium pontis, lower brachium pontis power switch;
The other fly-wheel diode in parallel respectively of each power switch in brachium pontis;
Described inverter controller, for controlling the opening of each power switch in three brachium pontis of described three-phase bridge type converter, turning off;
Described switching mode DC/DC step-down isolated variable circuit, comprises isolating transformer, rectification circuit;
The primary coil of described isolating transformer is used for connecing high direct voltage;
The secondary coil of described isolating transformer connects the input of described rectification circuit;
Described rectification circuit exports inversion operating voltage to described inverter controller;
Described urgent lower short-circuit protection circuit, comprises supply power voltage testing circuit, emergency service circuit;
Described supply power voltage testing circuit, the secondary coil of switching mode DC/DC step-down isolated variable circuit described in input termination, whether abnormal for judging the supply power voltage of described switching mode DC/DC step-down isolated variable circuit according to the output AC signal of secondary coil;
When supply power voltage is abnormal, it is true that described supply power voltage testing circuit exports power supply state signal, and when supply power voltage is normal, it is false that described supply power voltage testing circuit exports power supply state signal;
Described emergency service circuit, when power supply state signal is true time, carries out voltage transformation to described high-tension battery, exports critical activity voltage to described inverter controller, when power supply state signal is fictitious time, stops exporting critical activity voltage to described inverter controller;
Described inverter controller, when power supply state signal is true time, with described critical activity voltage for operating voltage, and three upper brachium pontis power switchs that output protection control signal controls described three-phase bridge type converter turn off, and three lower brachium pontis power switchs are open-minded; When power supply state signal is fictitious time, the inversion operating voltage exported with the rectification circuit of described switching mode DC/DC step-down isolated variable circuit is for operating voltage, and output services control signal controls three-phase bridge type converter output three-phase electricity signal.
2. three-phase bridge type converter system according to claim 1, is characterized in that,
Described high direct voltage derives from power management chip or the DC/DC module of electric automobile;
Described high direct voltage higher than described inversion operating voltage, and is less than high-tension battery voltage.
3. three-phase bridge type converter system according to claim 1, is characterized in that,
Described inverter controller has normal-power mode, low-power consumption mode two kinds of mode of operations, and the power consumption of inverter controller under low-power consumption mode is less than the power consumption under normal-power mode;
Be true time at described power supply state signal, described inverter controller works in low-power consumption mode.
4. three-phase bridge type converter system according to claim 1, is characterized in that,
Power switch in brachium pontis is igbt, collector electrode and an emitter two ends fly-wheel diode in parallel respectively of each igbt in brachium pontis.
5. the three-phase bridge type converter system according to any one of claim 1 to 4, is characterized in that,
Described urgent lower short-circuit protection circuit, comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the first diode, the second diode, the 3rd diode, the 4th voltage stabilizing didoe, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first NMOS tube, the second NMOS tube, the 3rd NMOS tube, the 4th transistor;
Between the grid of the secondary coil that described first resistance, the second diode are serially connected in described switching mode DC/DC step-down isolated variable circuit with described first NMOS tube, the negative terminal of the second diode is in the gate electrode side of the first NMOS tube;
Between the grid of the secondary coil that described second resistance, the first diode are serially connected in described switching mode DC/DC step-down isolated variable circuit with described first NMOS tube, the anode of the first diode is in the gate electrode side of the first NMOS tube;
The resistance of described second resistance is greater than the resistance of the first resistance;
Described first electric capacity is connected on the grid of the first NMOS tube with between ground;
Between the negative terminal of the drain electrode that described 3rd resistance is connected on described first NMOS tube with described 3rd diode;
The source ground of described first NMOS tube, drain electrode connects the first pole of described 4th transistor;
Second pole ground connection of described 4th transistor;
Described 4th resistance is connected between the 3rd negative terminal extremely with described 3rd diode of described 4th transistor;
The inversion operating voltage of the rectification circuit output of switching mode DC/DC step-down isolated variable circuit described in the positive termination of described 3rd diode;
Described second electric capacity is connected on the 3rd of described 4th transistor the extremely with between ground;
Described 5th resistance is connected between the 3rd grid extremely with described second NMOS tube of described 4th transistor;
3rd pole of described 4th transistor as power supply state signal output part, described 4th transistor the 3rd very low level time, power supply state signal is true, and during for high level, power supply state signal is false;
Described 4th transistor is NPN triode or nmos switch pipe, the described first very base stage of NPN triode or the grid of nmos switch pipe, the described second very emitter of NPN triode or the source electrode of nmos switch pipe, the described 3rd very collector electrode of NPN triode or the drain electrode of nmos switch pipe;
The source ground of described second NMOS tube;
Between the grid of the drain electrode that described 6th resistance is connected on described second NMOS tube with described 3rd NMOS tube;
Described 7th resistance be connected on described 3rd NMOS tube grid, drain electrode between;
Described 4th voltage stabilizing didoe is connected on the grid of described 3rd NMOS tube with between ground, and the negative terminal of the 4th voltage stabilizing didoe is in the gate electrode side of the 3rd NMOS tube;
Described 8th resistance is connected on the drain electrode of described 3rd NMOS tube with between high-tension battery;
Described 3rd electric capacity is connected on the source electrode of described 3rd NMOS tube with between ground;
Between the negative terminal of the source electrode that described 9th resistance is connected on described 3rd NMOS tube with described 3rd diode;
Described 9th resistance with the tie point of the negative terminal of described 3rd diode, for exporting critical activity voltage to described inverter controller.
6. three-phase bridge type converter system according to claim 5, is characterized in that,
The resistance of described second resistance is greater than 10 times of the resistance of the first resistance.
7. a urgent lower short-circuit protection circuit, it is characterized in that, comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the first diode, the second diode, the 3rd diode, the 4th voltage stabilizing didoe, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first NMOS tube, the second NMOS tube, the 3rd NMOS tube, the 4th transistor;
Described first resistance, the second diode, for be serially connected in switching mode DC/DC step-down isolated variable circuit the grid of secondary coil with described first NMOS tube between, the negative terminal of the second diode is in the gate electrode side of the first NMOS tube;
Described second resistance, the first diode, for be serially connected in switching mode DC/DC step-down isolated variable circuit the grid of secondary coil with described first NMOS tube between, the anode of the first diode is in the gate electrode side of the first NMOS tube;
The resistance of described second resistance is greater than the resistance of the first resistance;
Described first electric capacity is connected on the grid of the first NMOS tube with between ground;
Between the negative terminal of the drain electrode that described 3rd resistance is connected on described first NMOS tube with described 3rd diode;
The source ground of described first NMOS tube, drain electrode connects the first pole of described 4th transistor;
Second pole ground connection of described 4th transistor;
Described 4th resistance is connected between the 3rd negative terminal extremely with described 3rd diode of described 4th transistor;
The anode of described 3rd diode, the inversion operating voltage that the rectification circuit for connecing described switching mode DC/DC step-down isolated variable circuit exports;
Described second electric capacity is connected on the 3rd of described 4th transistor the extremely with between ground;
Described 5th resistance is connected between the 3rd grid extremely with described second NMOS tube of described 4th transistor;
3rd pole of described 4th transistor is as power supply state signal output part;
Described 4th transistor is NPN triode or nmos switch pipe, the described first very base stage of NPN triode or the grid of nmos switch pipe, the described second very emitter of NPN triode or the source electrode of nmos switch pipe, the described 3rd very collector electrode of NPN triode or the drain electrode of nmos switch pipe;
The source ground of described second NMOS tube;
Between the grid of the drain electrode that described 6th resistance is connected on described second NMOS tube with described 3rd NMOS tube;
Described 7th resistance be connected on described 3rd NMOS tube grid, drain electrode between;
Described 4th voltage stabilizing didoe is connected on the grid of described 3rd NMOS tube with between ground, and the negative terminal of the 4th voltage stabilizing didoe is in the gate electrode side of the 3rd NMOS tube;
Described 8th resistance is connected on the drain electrode of described 3rd NMOS tube with between high-tension battery;
Described 3rd electric capacity is connected on the source electrode of described 3rd NMOS tube with between ground;
Between the negative terminal of the source electrode that described 9th resistance is connected on described 3rd NMOS tube with described 3rd diode;
Described 9th resistance with the tie point of the negative terminal of described 3rd diode, for exporting critical activity voltage to described inverter controller.
8. urgent lower short-circuit protection circuit according to claim 7, is characterized in that,
The resistance of described second resistance is greater than 10 times of the resistance of the first resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210439518.6A CN102969918B (en) | 2012-11-06 | 2012-11-06 | Three-phase bridge type converter system and promptly descend short-circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210439518.6A CN102969918B (en) | 2012-11-06 | 2012-11-06 | Three-phase bridge type converter system and promptly descend short-circuit protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102969918A CN102969918A (en) | 2013-03-13 |
| CN102969918B true CN102969918B (en) | 2016-03-02 |
Family
ID=47799851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210439518.6A Active CN102969918B (en) | 2012-11-06 | 2012-11-06 | Three-phase bridge type converter system and promptly descend short-circuit protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102969918B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207339B (en) * | 2013-04-28 | 2015-09-30 | 科博达技术有限公司 | Inverter over-current judging method and device thereof |
| CN109039221B (en) | 2018-08-29 | 2021-12-10 | 阳光电源股份有限公司 | Active short circuit and motor controller |
| CN111463766A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
| CN113472270B (en) * | 2020-03-31 | 2023-05-26 | 广汽埃安新能源汽车有限公司 | Motor circuit protection method and system thereof |
| CN114079373A (en) * | 2020-08-21 | 2022-02-22 | 广汽埃安新能源汽车有限公司 | Vehicle, and active discharge circuit and method of vehicle |
| CN112636303A (en) * | 2020-12-21 | 2021-04-09 | 上海维宏电子科技股份有限公司 | Preventive circuit protection system and method for short circuit abnormality of motor control device |
| WO2023004625A1 (en) * | 2021-07-28 | 2023-02-02 | 华为技术有限公司 | Electric vehicle control system, and electric vehicle |
| CN114614443A (en) * | 2022-04-02 | 2022-06-10 | 上海威迈斯新能源有限公司 | Control circuit for short circuit detection and protection of MOSFET |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373925A (en) * | 2007-08-21 | 2009-02-25 | 三星电子株式会社 | Power supply apparatus |
| CN101599711A (en) * | 2008-06-04 | 2009-12-09 | 国琏电子（上海）有限公司 | Converter circuit |
| CN101704344A (en) * | 2009-11-30 | 2010-05-12 | 奇瑞汽车股份有限公司 | Control system for mileage adder of pure electric automobile and control method thereof |
| CN101924517A (en) * | 2009-06-11 | 2010-12-22 | 株式会社丰田自动织机 | DC-to-AC converter |
| EP2381573A1 (en) * | 2008-12-25 | 2011-10-26 | Hitachi, Ltd. | Apparatus for protecting power supply circuit of three-phase inverter |
| CN102291082A (en) * | 2010-06-16 | 2011-12-21 | 日立汽车系统株式会社 | Power conversion device |
| CN202889240U (en) * | 2012-11-06 | 2013-04-17 | 联合汽车电子有限公司 | Three-phase bridge-type inerter system and emergency short-circuit protection circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101614797B1 (en) * | 2008-09-22 | 2016-04-22 | 삼성전자 주식회사 | Device for protection of power factor correction in three phase power supply and control method thereof |
| JP5317188B2 (en) * | 2009-02-20 | 2013-10-16 | 株式会社安川電機 | Inverter device for electric vehicle and protection method thereof |
-
2012
- 2012-11-06 CN CN201210439518.6A patent/CN102969918B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373925A (en) * | 2007-08-21 | 2009-02-25 | 三星电子株式会社 | Power supply apparatus |
| CN101599711A (en) * | 2008-06-04 | 2009-12-09 | 国琏电子（上海）有限公司 | Converter circuit |
| EP2381573A1 (en) * | 2008-12-25 | 2011-10-26 | Hitachi, Ltd. | Apparatus for protecting power supply circuit of three-phase inverter |
| CN101924517A (en) * | 2009-06-11 | 2010-12-22 | 株式会社丰田自动织机 | DC-to-AC converter |
| CN101704344A (en) * | 2009-11-30 | 2010-05-12 | 奇瑞汽车股份有限公司 | Control system for mileage adder of pure electric automobile and control method thereof |
| CN102291082A (en) * | 2010-06-16 | 2011-12-21 | 日立汽车系统株式会社 | Power conversion device |
| CN202889240U (en) * | 2012-11-06 | 2013-04-17 | 联合汽车电子有限公司 | Three-phase bridge-type inerter system and emergency short-circuit protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102969918A (en) | 2013-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102969918B (en) | Three-phase bridge type converter system and promptly descend short-circuit protection circuit | |
| US9478995B2 (en) | Battery system | |
| US7830036B2 (en) | Power electronic module pre-charge system and method | |
| JP5389730B2 (en) | Discharge device for power conversion system | |
| US20120069604A1 (en) | Compact power converter with high efficiency in operation | |
| CN108847769A (en) | Three level BOOST devices of one kind and its control method | |
| CN103227610B (en) | Circuit for controlling motor and automobile | |
| US10576828B2 (en) | Variable voltage converter modulation obtaining lower minimum boost ratio | |
| US10840800B2 (en) | Power conversion device | |
| JP2013176251A (en) | Power supply device | |
| CN105915092A (en) | Power conversion apparatus | |
| KR20140081119A (en) | Power net system of fuel cell hybrid vehicle and charge/discharge control method | |
| CN106849635A (en) | Cascade connection multi-level transverter submodule pressure bypass circuit out of control | |
| CN111347901A (en) | Vehicle, charging device and motor control circuit | |
| CN103328253A (en) | Charge system for charging a battery of a vehicle with a two-way charge controller | |
| CN107472032B (en) | High-voltage direct-current circuit control system of motor controller of electric automobile | |
| CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
| CN112438008B (en) | Uninterruptible power supply device | |
| CN116278844A (en) | Charging control device, charging control method and power system for battery | |
| CN202889240U (en) | Three-phase bridge-type inerter system and emergency short-circuit protection circuit | |
| CN110723006A (en) | Electrical system, method for providing charging by battery, electric and hybrid motor vehicle | |
| CN102594099A (en) | Grid drive circuit of intelligent power module | |
| CN103269113A (en) | Low-voltage electromobile driving controller and charging method | |
| CN111736081A (en) | Multi-port energy semi-closed type transformer substation storage battery charging and discharging test device and method | |
| CN109950940B (en) | Valve block charging device and valve block charging control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |