CN114765361A - Overvoltage protection drive circuit, motor drive circuit and vehicle - Google Patents
Overvoltage protection drive circuit, motor drive circuit and vehicle Download PDFInfo
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- CN114765361A CN114765361A CN202210374934.6A CN202210374934A CN114765361A CN 114765361 A CN114765361 A CN 114765361A CN 202210374934 A CN202210374934 A CN 202210374934A CN 114765361 A CN114765361 A CN 114765361A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
- H02H7/205—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment for controlled semi-conductors which are not included in a specific circuit arrangement
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
- Protection Of Static Devices (AREA)
Abstract
The embodiment of the invention discloses an overvoltage protection driving circuit, a motor driving circuit and a vehicle. The overvoltage protection driving circuit includes: the switch comprises a switch signal generating module, a first switch module, a second switch module and a third switch module. And the overvoltage control module comprises an overvoltage detection output end, the overvoltage control module is connected with the control end of the third switch module, and when the current value flowing through the second switch module exceeds a preset current value or the voltage between the first end and the second end of the second switch module exceeds a preset voltage value, the third switch module is controlled to be switched on by a signal of the overvoltage detection output end. According to the embodiment of the invention, the protection circuit is built through the simple discrete element, so that the circuit cost is greatly saved, the conventional turn-off circuit can be disconnected during soft turn-off, and the influence of the conventional turn-off circuit on the soft turn-off is avoided.
Description
Technical Field
The embodiment of the invention relates to the technology of circuit overvoltage protection, in particular to an overvoltage protection driving circuit, a motor driving circuit and a vehicle.
Background
Motor drive circuits are widely used in controlling and driving motors of various devices. When the power tube is over-voltage, the power tube is often required to be turned off to protect the power tube. If the power tube is turned off at the speed of turning off during normal operation, the peak voltage is far higher than the peak voltage during normal operation due to the action of parasitic parameters in the circuit during turning off, so that the power tube is damaged. A relatively slow shut-down procedure should therefore be undertaken to suppress the excessively high spikes, this way of shutting down being referred to as soft shut-down.
The existing soft turn-off scheme usually adopts a chip added for realizing soft turn-off to build a motor driving circuit. The scheme is high in cost, and the conventional turn-off signal cannot be completely blocked, so that the soft turn-off effect is not ideal.
Disclosure of Invention
The invention provides an overvoltage protection driving circuit, a motor driving circuit and a vehicle, which are used for reducing the circuit cost and improving the soft turn-off effect.
In a first aspect, an embodiment of the present invention provides an overvoltage protection driving circuit, including:
the switching signal generation module comprises a turn-off signal generation submodule which comprises a turn-off signal output end;
the first end of the first switch module is connected with the turn-off signal output end;
a control end of the second switch module is connected with a second end of the first switch module, and a first end of the second switch module is connected with a load or a second end of the second switch module is connected with the load;
a first end of the third switch module is connected with a power-off leveling end, and a second end of the third switch module is connected with a control end of the first switch module;
the overvoltage control module comprises an overvoltage detection output end, the overvoltage control module is connected with the control end of the third switch module, and when the current value flowing through the second switch module exceeds a preset current value or the voltage between the first end and the second end of the second switch module exceeds a preset voltage value, a signal of the overvoltage detection output end controls the third switch module to be conducted;
and a first end of the first resistor is connected with a second end of the third switch module, and a second end of the first resistor is connected with a control end of the second switch module.
Optionally, the overvoltage control module further includes a second resistor and a third resistor, a first end of the second resistor is connected to the turn-off level terminal, a second end of the second resistor is connected to a first end of the third resistor and a control terminal of the third switch module, respectively, and a second end of the third resistor is connected to the overvoltage detection output terminal.
Optionally, the overvoltage control module further includes a fourth resistor and a first capacitor, a first end of the fourth resistor is connected to the overvoltage detection output terminal, a second end of the fourth resistor is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to the control terminal of the third switch module;
the overvoltage control module further comprises a voltage stabilizing diode, the negative electrode of the voltage stabilizing diode is connected with the control end of the third switch module, and the positive electrode of the voltage stabilizing diode is connected with the turn-off level end.
Optionally, the switch signal generating module further includes a conducting signal generating sub-module, where the conducting signal generating sub-module includes a fourth switch module, a fifth resistor and a conducting signal output end, a control end of the fourth switch module is connected to a control end of the conducting sub-module and a first end of the fifth resistor, a second end of the fifth resistor is connected to a conducting flat end, a first end of the fourth switch module is connected to the conducting flat end, and a second end of the fourth switch module is multiplexed as the conducting signal output end and connected to a control end of the second switch module;
the turn-off signal generation submodule also comprises a fifth switch module and a sixth resistor, the control end of the fifth switch module is respectively connected with the control end of the turn-off submodule and the first end of the sixth resistor, the second end of the sixth resistor is connected with the turn-off level end, the first end of the fifth switch module is connected with the turn-off level end, and the second end of the fifth switch module is multiplexed into the turn-off signal output end;
the fourth switch module outputs a signal capable of enabling the second switch module to be conducted through the conducting signal output end under the control of the conducting sub-module control end; and the fifth switch module outputs a signal capable of turning off the second switch module through the turn-off signal output end under the control of the control end of the turn-off submodule.
Optionally, the conduction signal generation submodule further includes a seventh resistor, a first end of the seventh resistor is connected to a first end of the fourth switch module, and a second end of the seventh resistor is connected to the conduction flat end;
the turn-off signal generation submodule further comprises an eighth resistor, a first end of the eighth resistor is connected with a first end of the fifth switch module, and a second end of the eighth resistor is connected with the turn-off leveling end.
Optionally, a ratio of the resistance value of the eighth resistor to the resistance value of the first resistor is less than 1: 10.
Optionally, the conduction signal generation sub-module further includes a ninth resistor, a second capacitor, and a first diode, a first end of the ninth resistor is connected to the first end of the second capacitor, the first end of the first diode, and the control end of the fourth switch module, respectively, and a second end of the ninth resistor is connected to the second end of the second capacitor, the second end of the first diode, and the control end of the conduction sub-module, respectively;
the turn-off signal generation submodule further comprises a tenth resistor, a third capacitor and a second diode, wherein a first end of the tenth resistor is connected with a first end of the third capacitor, a first end of the second diode and a control end of the fifth switch module respectively, and a second end of the tenth resistor is connected with a second end of the third capacitor, a second end of the second diode and a control end of the turn-off submodule respectively.
Optionally, the driving controller further includes a driving controller, a fourth capacitor and a fifth capacitor, the driving controller includes the conducting submodule control end, the disconnecting submodule control end, a grounding end, a conducting level input end and a disconnecting level input end, the conducting level input end is connected to the conducting level end and the first end of the fourth capacitor respectively, the disconnecting level input end is connected to the disconnecting level end and the first end of the fifth capacitor respectively, and the second end of the fourth capacitor is connected to the second end of the fifth capacitor.
In a second aspect, an embodiment of the present invention further provides a motor driving circuit, including any one of the above overvoltage protection driving circuits.
In a third aspect, an embodiment of the present invention further provides a vehicle, including the above motor drive circuit.
An overvoltage protection driving circuit in an embodiment of the present invention includes: the switching signal generating module comprises a turn-off signal generating submodule which comprises a turn-off signal output end; the first end of the first switch module is connected with the turn-off signal output end; the control end of the second switch module is connected with the second end of the first switch module, and the first end of the second switch module is connected with the load or the second end of the second switch module is connected with the load; the first end of the third switch module is connected with the power-off flat end, and the second end of the third switch module is connected with the control end of the first switch module; the overvoltage control module comprises an overvoltage detection output end, the overvoltage control module is connected with the control end of the third switch module, and when the current value flowing through the second switch module exceeds a preset current value or the voltage between the first end and the second end of the second switch module exceeds a preset voltage value, a signal of the overvoltage detection output end controls the third switch module to be conducted; and the first end of the first resistor is connected with the second end of the third switch module, and the second end of the first resistor is connected with the control end of the second switch module. According to the embodiment of the invention, the protection circuit is built through the simple discrete element, so that the circuit cost is greatly saved, the conventional turn-off circuit can be disconnected during soft turn-off, and the influence of the conventional turn-off circuit on the soft turn-off is avoided.
Drawings
Fig. 1 is a schematic structural diagram of an overvoltage protection driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another overvoltage protection driving circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another overvoltage protection driving circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Fig. 1 is a schematic structural diagram of an overvoltage protection driving circuit according to an embodiment of the present invention, and refer to fig. 1. An embodiment of the present invention provides an overvoltage protection driving circuit, including:
the switch signal generating module 1, the switch signal generating module 1 includes the turn-off signal produces the submodule, turn-off signal produces the submodule and includes the output end of turn-off signal;
the first end of the first switch module K1 is connected with the turn-off signal output end;
a control end of the second switch module K2 of the second switch module K2 is connected to a second end of the first switch module K1, and a first end of the second switch module K2 is connected to the load or a second end of the second switch module K2 is connected to the load;
a first end of the third switch module K3, a first end of the third switch module K3 is connected to a turn-off flat end VEE, and a second end of the third switch module K3 is connected to a control end of the first switch module K1;
the overvoltage control module 2 comprises an overvoltage detection output end Fault, the overvoltage control module 2 is connected with a control end of the third switch module K3, and when a current value flowing through the second switch module K2 exceeds a preset current value or voltage between the first end and the second end of the second switch module K2 exceeds a preset voltage value, a signal of the overvoltage detection output end Fault controls the third switch module K3 to be conducted;
a first end of the first resistor R1, the first end of the first resistor R1 is connected to the second end of the third switch module K3, and a second end of the first resistor R1 is connected to the control end of the second switch module K2.
Any one of the switch modules, such as the first switch module K1, the second switch module K2, and the third switch module K3, may be any controllable switch electrical element, such as a triode, a MOS transistor, and an IGBT. No limitation is made herein as to the specific type of switch module. Fig. 2 is a schematic structural diagram of another overvoltage protection driving circuit according to an embodiment of the present invention, and refer to fig. 2. For example, the first switching module K1 may be a transistor, the second switching module K2 may be an IGBT transistor, and the third switching module K3 may be a MOS transistor. For a triode, the control terminal is a base. And for the MOS tube or the IGBT tube, the control end is a grid. For an NPN-type transistor or an NMOS transistor, the turn-off level is a low level or a negative level, and the turn-on level is a high level. For a PNP type triode or a PMOS tube, the turn-off level is high level, and the turn-on level is low level or negative level. The other controllable switching electrical elements can determine the turn-off level of the turn-off level terminal VEE according to their own characteristics. The signal for controlling the switch module to be conducted can be a voltage signal or a current signal. The specific signal type can be determined according to actual needs. The turn-off signal output end of the switching signal generating module 1 is used for outputting a turn-off signal. Optionally, the switch signal generating module 1 may further include a conduction signal generating submodule, where the conduction signal generating submodule includes a conduction signal output terminal, and the conduction signal output terminal is configured to output a conduction signal. The switching signal generating module 1 controls the second switching module K2 by an on signal and an off signal. The switching signal generating module can meet the characteristics of the switching signal generating module, that is, the switching signal generating module can be used as the switching signal generating module. The second switching module K2 can be used as the upper or lower arm of the drive circuit. When the second switch module K2 is used as an upper bridge arm of the driving circuit, a first end of the second switch module K2 is connected to a load power supply for driving the load motor to operate, and a second end of the second switch module K2 is connected to one end of a winding of the load motor; when the second switch module K2 is used as the upper arm of the driving circuit, the first end of the second switch module K2 is connected to one end of the winding of the load motor, and the second end of the second switch module K2 is grounded. The voltage between the first terminal and the second terminal of the second switch module K2 may be measured by an external circuit, or the current flowing through the second switch module K2 may be measured by a current sensor, and the voltage between the first terminal and the second terminal of the second switch module K2 may be reversely pushed by the current flowing through the second switch module K2, so as to perform an overvoltage protection on the second switch module K2. Taking the turn-off level as a negative level, if the voltage or current between the first terminal and the second terminal of the second switch module K2 exceeds a predetermined voltage value or a predetermined current value, the external circuit drives the overvoltage detection output terminal Fault to control the third switch module K3 to turn on. The negative level is conducted to the control terminal of the first switch module K1 through the third switch module K3, so that the first switch module K1 is turned off, thereby disconnecting the connection between the turn-off signal output terminal and the control terminal of the first switch module. The second switch module K2 is prevented from being rapidly turned off by the turn-off signal output end, so that the second switch module K2 is prevented from being damaged. At the same time, a loop is opened between the switching-off level terminal VEE, the first resistor R1 and the control terminal of the second switching module K2. The negative level discharges a parasitic capacitor of the second switch module K2 through the first resistor R1, and the current limiting function of the first resistor R1 slowly turns off the second switch module K2, so that the second switch module K2 is prevented from being damaged by overvoltage while the second switch module K2 is prevented from being damaged by spike voltage. According to the embodiment of the invention, the signal output by the overvoltage detection output end Fault is directly utilized, and the protection circuit is built through a simple discrete element. The circuit cost is greatly saved, the conventional turn-off circuit can be disconnected during soft turn-off, and the influence of the conventional turn-off circuit on the soft turn-off is avoided.
Fig. 3 is a schematic structural diagram of another overvoltage protection driving circuit according to an embodiment of the present invention, and refer to fig. 3. In other embodiments, the overvoltage control module 2 further includes a second resistor R2 and a third resistor R3, a first end of the second resistor R2 is connected to the turn-off voltage-leveling terminal VEE, a second end of the second resistor R2 is connected to a first end of the third resistor R3 and a control end of the third switch module K3, and a second end of the third resistor R3 is connected to the overvoltage detection output terminal Fault.
Since the voltage of the overvoltage detection output Fault may not match the voltage or current required to drive the third switch module K3, the voltage or current of the overvoltage detection output Fault may be adjusted by adding the second resistor R2 and the third resistor R3, so as to match the voltage required to drive the third switch module K3.
With continued reference to fig. 3. In other embodiments, the overvoltage control module 2 further includes a fourth resistor R4 and a first capacitor C1, a first end of the fourth resistor R4 is connected to the overvoltage detection output terminal Fault, a second end of the fourth resistor R4 is connected to a first end of the first capacitor C1, and a second end of the first capacitor C1 is connected to the control end of the third switch module K3;
the overvoltage control module 2 further comprises a voltage stabilizing diode DW, a cathode of the voltage stabilizing diode DW is connected with the control end of the third switch module K3, and an anode of the voltage stabilizing diode DW is connected with the turn-off flat end VEE.
The voltage at the control terminal of the third switching module K3 can be stabilized by the combination of the fourth resistor R4, the first capacitor C1 and the zener diode DW. Thereby improving the stability and reliability of the circuit.
With continued reference to fig. 3. In other embodiments, the switching signal generating module 1 further includes a conducting signal generating submodule 11, where the conducting signal generating submodule 11 includes a fourth switching module K4, a fifth resistor R5 and a conducting signal output terminal, a control terminal of the fourth switching module K4 is connected to the conducting submodule control terminal VoutP and a first terminal of the fifth resistor R5, respectively, a second terminal of the fifth resistor R5 is connected to a conducting flat terminal VCC, a first terminal of the fourth switching module K4 is connected to the conducting flat terminal VCC, and a second terminal of the fourth switching module K4 is multiplexed as a conducting signal output terminal and connected to a control terminal of the second switching module K2;
the turn-off signal generating submodule 12 further includes a fifth switch module K5 and a sixth resistor R6, a control end of the fifth switch module K5 is connected to the control end VoutN of the turn-off submodule and the first end of the sixth resistor R6 respectively, a second end of the sixth resistor R6 is connected to the turn-off leveling end VEE, a first end of the fifth switch module K5 is connected to the turn-off leveling end VEE, and a second end of the fifth switch module K5 is multiplexed as a turn-off signal output end;
the fourth switch module K4 outputs a signal capable of turning on the second switch module K2 through the on-signal output terminal under the control of the on-submodule control terminal VoutP; the fifth switch module K5 outputs a signal capable of turning off the second switch module K2 through the turn-off signal output terminal under the control of the turn-off submodule control terminal VoutN.
The on level and the off level at the on level terminal VCC and the off level terminal VEE may be for the second switch module K2, that is, the second switch module K2 may be turned on by applying the on level at the control terminal of the second switch module K2; applying the off level at the control terminal of the second switching module K2 may turn off the second switching module K2. The on submodule control terminal VoutP and the off submodule control terminal VoutN can both be connected with an external circuit, and the external circuit drives the fourth switch module K4 and the fifth switch module K5 to be switched on and off respectively through the on submodule control terminal VoutP and the off submodule control terminal VoutN, so as to control the signal output of the on signal output end and the off signal output end respectively. For example, suppose the fourth switch module K4 is a PMOS transistor, the fifth switch module K5 is an NMOS transistor, and the second switch module K2 is an NMOS transistor. When the conducting submodule control terminal VoutP and the turning-off submodule control terminal VoutN are both at low level, the fourth switch module K4 is turned on, the fifth switch module K5 is turned off, and at the moment, high-level voltage is applied to the grid electrode of the second switch module K2 to turn on the second switch module K2; when the on-submodule control terminal VoutP and the off-submodule control terminal VoutN are both at a high level, the fourth switch module K4 is turned off, the fifth switch module K5 is turned on, and a negative level voltage is applied to the gate of the second switch module K2 at this time to turn off the second switch module K2. The on and off of the second switch module K2 are easier to control through the above manner.
With continued reference to fig. 3. Further, the conduction signal generating submodule 11 further includes a seventh resistor R7, a first end of the seventh resistor R7 is connected to a first end of the fourth switch module K4, and a second end of the seventh resistor R7 is connected to a conduction flat terminal VCC;
the turn-off signal generating submodule 12 further includes an eighth resistor R8, a first end of the eighth resistor R8 is connected to a first end of the fifth switch module K5, and a second end of the eighth resistor R8 is connected to the turn-off level terminal VEE.
The seventh resistor R7 and the eighth resistor R8 are introduced, so that the switch module of the overvoltage protection driving circuit can be better protected. Thereby improving the stability and reliability of the circuit.
With continued reference to fig. 3. Further, the ratio of the resistance of the eighth resistor R8 to the resistance of the first resistor R1 is less than 1: 10.
The resistance of the first resistor R1 should be much larger than that of the eighth resistor R8, so as to slow down the turn-off speed of the second switch module K2 in an overvoltage state, thereby forming a soft turn-off. The resistance values of the first resistor R1 and the eighth resistor R8 can be determined according to actual needs.
With continued reference to fig. 3. In other embodiments, the turn-on signal generating sub-module 11 further includes a ninth resistor R9, a second capacitor C2, and a first diode D1, a first terminal of the ninth resistor R9 is connected to the first terminal of the second capacitor C2, the first terminal of the first diode D1, and the control terminal of the fourth switch module K4, respectively, and a second terminal of the ninth resistor R9 is connected to the second terminal of the second capacitor C2, the second terminal of the first diode D1, and the turn-on sub-module control terminal VoutP;
the turn-off signal generating submodule 12 further includes a tenth resistor R10, a third capacitor C3, and a second diode D2, a first end of the tenth resistor R10 is connected to a first end of the third capacitor C3, a first end of the second diode D2, and a control end of the fifth switch module K5, and a second end of the tenth resistor R10 is connected to a second end of the third capacitor C3, a second end of the second diode D2, and a turn-off submodule control end VoutN.
By additionally arranging protection devices such as a ninth resistor R9, a second capacitor C2, a first diode D1, a tenth resistor R10, a third capacitor C3 and a second diode D2, the stability and reliability of the circuit can be improved, voltage or current impact of a VoutN signal of a control end VoutP of the conducting submodule and a control end VoutN signal of the turning-off submodule on the fourth switch module K4 and the fifth switch module K5 can be reduced, and the service life of the switch module can be prolonged.
With continued reference to fig. 3. In other embodiments, the driving controller further includes a fourth capacitor C4 and a fifth capacitor C5, the driving controller includes a conducting sub-module control terminal VoutP, a turning-off sub-module control terminal VoutN, a ground terminal VE, a conducting level input terminal VCC2 and a turning-off level input terminal VEE2, the conducting level input terminal VCC2 is connected to the conducting level terminal VCC and a first terminal of the fourth capacitor C4, the turning-off level input terminal VEE2 is connected to the turning-off level terminal VEE and a first terminal of the fifth capacitor C5, respectively, and a second terminal of the fourth capacitor C4 is connected to a second terminal of the fifth capacitor C5.
The driving controller may be any device for driving and controlling a load, and may be a driving chip, for example. When the second switch module K2 is grounded as a lower arm, the grounding can be performed through the ground terminal VE of the driving controller. The drive controller may be supplied with an on level through an on level input VCC2 and an off level through an off level input VEE 2. Where one of the on and off levels is high and the other may be low or negative. The fourth capacitor C4 and the fifth capacitor C5 function as filter capacitors and stabilize the on and off levels.
With continued reference to fig. 3. In other embodiments, the third capacitor C6 is further included, a first end of the sixth capacitor C6 is connected to a first end of the first resistor R1, and a second end of the sixth capacitor C6 is connected to a second end of the first resistor R1.
The sixth capacitor C6 is additionally arranged, so that the parasitic capacitor of the second switch module K2 can discharge more conveniently, and the protection effect of the overvoltage protection driving circuit is improved.
On the other hand, the embodiment of the invention also provides a motor driving circuit which comprises any one of the overvoltage protection driving circuits.
The motor driving circuit can be any circuit for driving a motor, and comprises a three-phase six-arm bridge type driving circuit. The motor driving circuit provided by the embodiment of the invention comprises the overvoltage protection driving circuit provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects.
On the other hand, the embodiment of the invention also provides a vehicle which comprises the motor driving circuit.
The vehicle provided by the embodiment of the invention comprises the motor driving circuit provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. An overvoltage protection driver circuit, comprising:
the switching signal generation module comprises a turn-off signal generation submodule which comprises a turn-off signal output end;
the first end of the first switch module is connected with the turn-off signal output end;
a control end of the second switch module is connected with a second end of the first switch module, and a first end of the second switch module is connected with a load or a second end of the second switch module is connected with the load;
a first end of the third switch module is connected with a power-off leveling end, and a second end of the third switch module is connected with a control end of the first switch module;
the overvoltage control module comprises an overvoltage detection output end, the overvoltage control module is connected with the control end of the third switch module, and when the current value flowing through the second switch module exceeds a preset current value or the voltage between the first end and the second end of the second switch module exceeds a preset voltage value, a signal of the overvoltage detection output end controls the third switch module to be conducted;
and a first end of the first resistor is connected with a second end of the third switch module, and a second end of the first resistor is connected with a control end of the second switch module.
2. The overvoltage protection driving circuit according to claim 1, wherein the overvoltage control module further comprises a second resistor and a third resistor, a first end of the second resistor is connected to the turn-off level terminal, a second end of the second resistor is connected to a first end of the third resistor and the control terminal of the third switch module, respectively, and a second end of the third resistor is connected to the overvoltage detection output terminal.
3. The overvoltage protection driving circuit according to claim 1, wherein the overvoltage control module further comprises a fourth resistor and a first capacitor, a first end of the fourth resistor is connected to the overvoltage detection output terminal, a second end of the fourth resistor is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to the control terminal of the third switch module;
the overvoltage control module further comprises a voltage stabilizing diode, the negative electrode of the voltage stabilizing diode is connected with the control end of the third switch module, and the positive electrode of the voltage stabilizing diode is connected with the turn-off level end.
4. The overvoltage protection driving circuit according to claim 1, wherein the switching signal generating module further comprises a conducting signal generating submodule, the conducting signal generating submodule comprises a fourth switching module, a fifth resistor and a conducting signal output terminal, a control terminal of the fourth switching module is respectively connected with a control terminal of the conducting submodule and a first terminal of the fifth resistor, a second terminal of the fifth resistor is connected with a conducting flat terminal, a first terminal of the fourth switching module is connected with the conducting flat terminal, and a second terminal of the fourth switching module is multiplexed as the conducting signal output terminal and is connected with a control terminal of the second switching module;
the turn-off signal generation submodule further comprises a fifth switch module and a sixth resistor, the control end of the fifth switch module is respectively connected with the control end of the turn-off submodule and the first end of the sixth resistor, the second end of the sixth resistor is connected with the turn-off level end, the first end of the fifth switch module is connected with the turn-off level end, and the second end of the fifth switch module is multiplexed as the turn-off signal output end;
the fourth switch module outputs a signal capable of enabling the second switch module to be conducted through the conducting signal output end under the control of the conducting submodule control end; and the fifth switch module outputs a signal capable of turning off the second switch module through the turn-off signal output end under the control of the control end of the turn-off submodule.
5. The overvoltage protection driving circuit according to claim 4, wherein the turn-on signal generation submodule further comprises a seventh resistor, a first end of the seventh resistor is connected to a first end of the fourth switch module, and a second end of the seventh resistor is connected to the turn-on flat end;
the turn-off signal generation submodule further comprises an eighth resistor, a first end of the eighth resistor is connected with a first end of the fifth switch module, and a second end of the eighth resistor is connected with the turn-off leveling end.
6. The overvoltage protection driving circuit according to claim 5, wherein a ratio of a resistance value of the eighth resistor to a resistance value of the first resistor is less than 1: 10.
7. The overvoltage protection driving circuit according to claim 4, wherein the turn-on signal generation submodule further comprises a ninth resistor, a second capacitor and a first diode, a first end of the ninth resistor is connected to a first end of the second capacitor, a first end of the first diode and a control end of the fourth switch module, respectively, and a second end of the ninth resistor is connected to a second end of the second capacitor, a second end of the first diode and a control end of the turn-on submodule, respectively;
the turn-off signal generation submodule further comprises a tenth resistor, a third capacitor and a second diode, wherein the first end of the tenth resistor is respectively connected with the first end of the third capacitor, the first end of the second diode and the control end of the fifth switch module, and the second end of the tenth resistor is respectively connected with the second end of the third capacitor, the second end of the second diode and the control end of the turn-off submodule.
8. The overvoltage protection driving circuit according to claim 4, further comprising a driving controller, a fourth capacitor and a fifth capacitor, wherein the driving controller includes the on sub-module control terminal, the off sub-module control terminal, a ground terminal, an on level input terminal and the off level input terminal, the on level input terminal is connected to the on level terminal and the first terminal of the fourth capacitor respectively, the off level input terminal is connected to the off level terminal and the first terminal of the fifth capacitor respectively, and the second terminal of the fourth capacitor is connected to the second terminal of the fifth capacitor.
9. A motor drive circuit comprising the overvoltage protection drive circuit of any one of claims 1 to 8.
10. A vehicle characterized by comprising the motor drive circuit according to claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210374934.6A CN114765361A (en) | 2022-04-11 | 2022-04-11 | Overvoltage protection drive circuit, motor drive circuit and vehicle |
| PCT/CN2022/131379 WO2023197594A1 (en) | 2022-04-11 | 2022-11-11 | Overvoltage protection driving circuit, motor driving circuit, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210374934.6A CN114765361A (en) | 2022-04-11 | 2022-04-11 | Overvoltage protection drive circuit, motor drive circuit and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114765361A true CN114765361A (en) | 2022-07-19 |
Family
ID=82364923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210374934.6A Pending CN114765361A (en) | 2022-04-11 | 2022-04-11 | Overvoltage protection drive circuit, motor drive circuit and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114765361A (en) |
| WO (1) | WO2023197594A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197594A1 (en) * | 2022-04-11 | 2023-10-19 | 潍柴动力股份有限公司 | Overvoltage protection driving circuit, motor driving circuit, and vehicle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202888814U (en) * | 2012-09-29 | 2013-04-17 | 北京合康亿盛变频科技股份有限公司 | IGBT short circuit protection soft turn-off circuit |
| CN209016697U (en) * | 2018-09-30 | 2019-06-21 | 浙江鲲悟科技有限公司 | The current foldback circuit of power conversion system and power switch tube |
| CN210724183U (en) * | 2019-11-25 | 2020-06-09 | 上海汽车变速器有限公司 | IGBT overcurrent and short circuit protection circuit |
| CN114765361A (en) * | 2022-04-11 | 2022-07-19 | 潍柴动力股份有限公司 | Overvoltage protection drive circuit, motor drive circuit and vehicle |
-
2022
- 2022-04-11 CN CN202210374934.6A patent/CN114765361A/en active Pending
- 2022-11-11 WO PCT/CN2022/131379 patent/WO2023197594A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197594A1 (en) * | 2022-04-11 | 2023-10-19 | 潍柴动力股份有限公司 | Overvoltage protection driving circuit, motor driving circuit, and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023197594A1 (en) | 2023-10-19 |
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