CN115622472A - Straight-through discharge control circuit, vehicle driving module and automobile - Google Patents
Straight-through discharge control circuit, vehicle driving module and automobile Download PDFInfo
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- CN115622472A CN115622472A CN202211395722.2A CN202211395722A CN115622472A CN 115622472 A CN115622472 A CN 115622472A CN 202211395722 A CN202211395722 A CN 202211395722A CN 115622472 A CN115622472 A CN 115622472A
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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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/085—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
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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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
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- Inverter Devices (AREA)
Abstract
The invention discloses a through discharge control circuit, a vehicle driving module and an automobile. The direct discharge control circuit is applied to a vehicle driving module, the vehicle driving module comprises a three-phase inversion module, the direct discharge control circuit comprises a driving assembly, the driving assembly is used for controlling at least one phase of bridge arm switching circuit in the three-phase inversion module to be in a direct discharge state, and the direct discharge control circuit further comprises a voltage detection assembly and a driving regulation module. The invention aims to improve the reliability and safety of the through discharge operation of a vehicle driving module.
Description
Technical Field
The invention relates to the technical field of vehicle driving, in particular to a through discharge control circuit, a vehicle driving module and an automobile.
Background
The vehicle driving module of the new energy automobile generally comprises a driving motor and a driving motor controller, and as shown in fig. 1, the vehicle driving module realizes the electric and braking control of the motor by switching on and off 6 switching tubes (T1-T6) according to a certain rule. The driving motor controller also comprises a bus capacitor, and when the vehicle driving module is connected to a vehicle, the bus capacitor is electrically connected with the battery pack and has the functions of storing energy and smoothing the voltage of the bus. In the whole vehicle power-off process, the bus capacitor stores larger energy to cause higher voltage. In order to prevent people from being injured, the voltage of the bus capacitor needs to be reduced to below 60V, and the common discharge modes are passive discharge and active discharge. The active discharge has the advantage of high discharge speed, and the common active discharge methods include motor winding discharge, parallel disconnectable discharge resistance, direct-current transformer winding discharge and bridge arm direct discharge.
In practical applications, in order to quickly reduce the voltage of the bus capacitor, active discharge is generally performed in a bridge arm through discharge mode. However, the bridge arm through discharge may cause a through short circuit of the upper and lower bridge arm switching tubes in the same phase, and in order to protect the switching tubes from overcurrent or overtemperature damage, the short-circuit current needs to be limited during the bridge arm through discharge. In the prior art, 2 detection methods are common, and method 1 is to detect the IGBT current, but this method requires the switch tube to have an auxiliary emitter pin, increases the cost of the switch tube, and limits the type of the switch tube. In the method 2, the NTC is used for detecting the temperature of the IGBT, but the detection delay is long, the junction temperature change of the IGBT cannot be rapidly and accurately acquired, and further the rapid protection cannot be realized in a very short-circuit time.
Disclosure of Invention
The invention mainly aims to provide a through discharge control circuit, a vehicle driving module and an automobile, and aims to improve the reliability and safety of through discharge operation of the vehicle driving module.
In order to achieve the above object, the present invention provides a through discharge control circuit, which is applied to a vehicle driving module, wherein the vehicle driving module includes a three-phase inverter module, the through discharge control circuit includes a driving assembly, the driving assembly is used for controlling at least one phase bridge arm switch circuit in the three-phase inverter module to be in a through discharge state, and the through discharge control circuit further includes:
the voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in the bridge arm switching circuit in the through discharge state and outputting a corresponding voltage detection signal;
the driving adjusting module is electrically connected with the voltage detection assembly and the driving assembly respectively; and the driving adjusting module is used for controlling the driving assembly to adjust the working state of the corresponding switch tube according to the voltage detection signal so as to enable the current flowing through each phase of bridge arm switch circuit in the direct discharge state to be within a preset safe current interval.
Optionally, N phase bridge arm switch circuits in the three-phase inverter module are set to be used for through discharge, the number of the voltage detection assemblies is correspondingly set to be N, the N voltage detection assemblies are electrically connected with the N phase bridge arm switch circuits used for through discharge in a one-to-one correspondence manner, and N is greater than or equal to 1.
Optionally, the voltage detection assembly is electrically connected to an upper bridge arm switch circuit or a lower bridge arm switch circuit in a through discharge state; the voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in the upper bridge arm switching circuit or the switching-on voltage drop of a switching tube in the lower bridge arm switching circuit and outputting corresponding voltage detection signals.
Optionally, the voltage detection signal includes an upper bridge arm voltage detection signal and a lower bridge arm voltage detection signal;
each voltage detection assembly comprises an upper bridge arm voltage detection assembly and a lower bridge arm voltage detection assembly;
an upper bridge arm switching circuit in one phase of bridge arm switching circuits correspondingly and electrically connected with the voltage detection assembly is electrically connected with the upper bridge arm voltage detection assembly; a lower bridge arm switching circuit in one phase of bridge arm switching circuits correspondingly and electrically connected with the voltage detection assembly is electrically connected with the lower bridge arm voltage detection assembly;
the upper bridge arm voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in an upper bridge arm switching circuit and outputting a corresponding upper bridge arm voltage detection signal;
the lower bridge arm voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in a lower bridge arm switching circuit and outputting a corresponding lower bridge arm voltage detection signal.
Optionally, the driving adjustment module is further configured to access a plurality of driving signals, and output the plurality of driving signals to the driving assembly, so that the driving assembly controls at least one phase of bridge arm switching circuit in the three-phase inverter module to be in a through discharge state according to the plurality of driving signals;
and the driving regulation module is also used for adjusting the duty ratio of the driving signal corresponding to the voltage detection signal when the voltage detection signal determines that the switching-on voltage drop of the switching tube in the bridge arm switching circuit in the through discharge state reaches the alarm voltage value, so that the driving component controls the corresponding switching tube to be in the off state in the remaining time of the current driving period.
Optionally, the driving adjustment module is further configured to, after adjusting the duty ratio of the driving signal corresponding to the driving adjustment module to enable the driving assembly to control the corresponding switching tube to be in the off state within the remaining time of the current driving period, decrease the duty ratio of the driving signal corresponding to the switching tube and output the decreased duty ratio to the driving assembly, so that the driving assembly controls the corresponding switching tube to recover from the off state to the operating state according to the adjusted driving signal.
Optionally, the driving adjustment module is further configured to, when it is determined according to the voltage detection signal that the turn-on voltage drop of the switching tube flowing through the bridge arm switching circuit in the through discharge state does not reach the alarm voltage value, increase a duty ratio of a driving signal corresponding to the switching tube and output the driving signal to the driving assembly, so that the driving assembly controls the corresponding switching tube to operate according to the adjusted driving signal.
Optionally, the voltage detecting assembly includes: the circuit comprises a charging circuit, a first diode, a first comparator and a first capacitor;
the positive phase input end of the first comparator, the anode of the first diode, and the first end of the first capacitor are connected with the output end of the charging circuit; the cathode of the first diode is connected with the drain electrode of the corresponding switch tube; the inverting input end of the first comparator is used for accessing alarm voltage, and the output end of the first comparator is electrically connected with the driving regulation module.
Optionally, the charging circuit comprises a current source; alternatively, the first and second electrodes may be,
the output end of the voltage source is connected with the first end of the first resistor, and the second end of the first resistor is connected with the first end of the first capacitor.
Optionally, the driving component is electrically connected to the first end of the first capacitor; the driving assembly is further used for discharging the first capacitor when the corresponding switching tube is controlled to be in an off state.
Optionally, the voltage detection assembly and the driving adjustment module are integrated in the driving assembly.
The invention also provides a vehicle driving module which comprises a three-phase inversion module and the direct discharge control circuit.
The invention also provides an automobile comprising the vehicle driving module.
The through discharge control circuit comprises a voltage detection assembly and a driving regulation module, wherein the voltage detection assembly is used for detecting the opening and voltage drop of a switching tube in a bridge arm switching circuit in a through discharge state and outputting a corresponding voltage detection signal; the driving adjusting module is used for controlling the driving assembly to adjust the working state of the corresponding switch tube according to the voltage detection signal, so that the current flowing through each phase of bridge arm switch circuit in the direct discharge state is in a preset safe current interval. So, in practical application, this application utilizes the switch tube when heavy current short circuit, and the switch tube moves back the output characteristic that the saturation in-process switched on the voltage drop is showing and is increasing to when the voltage drop of opening at the switch tube reaches certain default, the operating condition of adjustment switch tube in time, in order to reduce the electric current that flows through the switch tube, thereby play the effect of protection switch tube, guaranteed the stability of switch tube work, and then improved reliability and the security that vehicle drive module carried out direct discharge work. In addition, compared with the mode of realizing short-circuit protection by adopting temperature detection and the mode of current detection in the prior art, the scheme of detecting the opening voltage drop to realize short-circuit protection has higher sensitivity and adaptability, thereby further improving the working safety and stability of the switch tube.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an exemplary circuit module of a vehicle drive module;
FIG. 2 is a schematic circuit block diagram of a through discharge control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic circuit block diagram of another embodiment of a through discharge control circuit according to the present invention;
FIG. 4 is a schematic circuit block diagram of a through discharge control circuit according to another embodiment of the present invention;
FIG. 5 is a detailed circuit diagram of a through discharge control circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of driving signals output to corresponding switching tubes in an embodiment of the through discharge control circuit according to the present invention;
FIG. 7 is a schematic diagram of driving signals in an embodiment of a through discharge control circuit according to the present invention;
fig. 8 is a voltage-current characteristic curve of an IGBT switching tube.
The reference numbers illustrate:
the implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
It should be understood that a vehicle driving module of a new energy automobile generally comprises a driving motor and a driving motor controller, and as shown in fig. 1, the vehicle driving module realizes the electric and braking control of the motor by turning on and off 6 switching tubes (T1-T6) according to a certain rule. The driving motor controller also comprises a bus capacitor, and when the vehicle driving module is connected to a vehicle, the bus capacitor is electrically connected with the battery pack and has the functions of storing energy and smoothing the voltage of the bus. In the whole vehicle power-off process, the bus capacitor stores larger energy to cause higher voltage. In order to prevent people from being injured, the voltage of the bus capacitor needs to be reduced to below 60V, and the common discharge modes are passive discharge and active discharge. The active discharge has the advantage of high discharge speed, and the common active discharge methods include motor winding discharge, parallel disconnectable discharge resistance, direct-current transformer winding discharge and bridge arm direct discharge.
In practical applications, in order to quickly reduce the voltage of the bus capacitor, active discharge is generally performed in a bridge arm through discharge mode. However, the bridge arm through discharge may cause a through short circuit of the upper and lower bridge arm switching tubes in the same phase, and in order to protect the switching tubes from overcurrent or overtemperature damage, the short-circuit current needs to be limited during the bridge arm through discharge. In the prior art, 2 detection methods are common, and method 1 is to detect the IGBT current, but this method requires the switch tube to have an auxiliary emitter pin, increases the cost of the switch tube, and limits the type of the switch tube. In the method 2, the NTC is adopted to detect the IGBT temperature, but the detection delay is long, the junction temperature change of the IGBT cannot be quickly and accurately acquired, and further the quick protection cannot be realized in an extremely short-circuit time.
Therefore, the invention provides a through discharge control circuit, which is applied to a vehicle driving module, wherein the vehicle driving module comprises a three-phase inversion module, the through discharge control circuit comprises a driving assembly 30, and the driving assembly 30 is used for controlling at least one phase of bridge arm switching circuit in the three-phase inversion module to be in a through discharge state.
It should be understood that, referring to fig. 8, taking an output characteristic curve corresponding to the driving voltage Vge3 in the figure as an example for explanation, the operating current of the switching tube generally does not exceed the rated current Inom thereof, for example, the position of the point a, and the corresponding turn-on voltage drop (VCE) is less than 5V, when the direct discharge is performed, referring to fig. 1 and fig. 2, the upper and lower bridge arm switching tubes in one phase of bridge arm switching circuit are controlled to be directly in one switching state, and the other direct state or both switching states, so as to perform the direct discharge on the whole bridge arm within a certain time, so as to reduce the voltage of the bus capacitor. At this time, the short-circuit current will rise rapidly to make the switch tube enter the desaturation state. At this time, the temperature of the switching tube increases, which causes the impedance to increase, and further causes the turn-on voltage drop to increase, and at this time, if the short-circuit current remains so large, the switching tube may be burned out.
Referring to fig. 2, in an embodiment of the present invention, the through discharge control circuit further includes:
the voltage detection assembly 10 is used for detecting the switching-on voltage drop of a switching tube in the bridge arm switching circuit in the through discharge state and outputting a corresponding voltage detection signal;
the driving adjusting module 20, the driving adjusting module 20 is electrically connected with the voltage detecting component 10 and the driving component 30 respectively; the driving adjustment module 20 is configured to control the driving assembly 30 to adjust a working state of a corresponding switching tube according to the voltage detection signal, so that a current flowing through each phase bridge arm switching circuit in the through discharge state is within a preset safe current interval.
In this embodiment, the voltage detection component 10 can be implemented by a voltage detection circuit, such as a resistor divider circuit, a voltage detection chip, or the like. The driving and adjusting module 20 may be composed of a plurality of switching tubes and logic devices, or may be directly implemented by a main controller, such as an MCU, a DSP (Digital Signal processing, DSP), an FPGA (Field Programmable Gate Array), an SOC (System On Chip), and the like.
Optionally, in an embodiment, the driving adjustment module 20 may control the driving assembly 30 to control at least one phase of the bridge arm switching circuit in the three-phase inverter module to be in a through discharge state according to a driving signal given from the outside, and control the driving assembly 30 to adjust the working state of the corresponding switching tube according to the voltage detection signal. Optionally, in another embodiment, the driving adjustment module 20 may be further configured to adjust a driving signal output by the driving assembly 30 to the corresponding switch tube according to the voltage detection signal, so as to adjust the working state of the corresponding switch tube.
The operation state may include, among others, an on or off state, a switching frequency, an on and off time in each driving period, and the like.
Optionally, in an embodiment, the number of the voltage detection assemblies 10 is at least one, a switch switching array may be further disposed in the circuit, and the external main control may control the switch switching array to switch an electrical connection relationship between the at least one voltage assembly and the bridge arm switch circuit according to a current direct discharge requirement. For example, when the number of the current voltage detection assembly 10 is one and a U-phase bridge arm switch circuit is required to perform through discharge, the external master control controls the switch switching array to work so as to electrically connect the voltage detection assembly 10 and the drains of the switch tubes in the U-phase bridge arm switch circuit to detect the turn-on voltage drop of the corresponding switch tubes.
It should be understood that, in the actual through discharge process, in order to increase the discharge rate to the bus capacitor, at least one phase bridge arm switch circuit is often in a through discharge state according to some current parameters, such as the voltage of the bus capacitor. For this reason, in another embodiment, the N-phase bridge arm switch circuits in the three-phase inverter module are configured to be used for through discharge, the number of the voltage detection assemblies 10 is correspondingly configured to be N, the N voltage detection assemblies 10 are electrically connected to the N-phase bridge arm switch circuits used for through discharge in a one-to-one correspondence manner, and N is greater than or equal to 1. Specifically, referring to fig. 3, in the content illustrated in fig. 3, U-phase and V-phase bridge arm switch circuits are both configured to perform through discharge, and at this time, the number of the voltage detection assemblies 10 is also multiple, and the voltage detection assemblies are respectively electrically connected to drains of switch tubes in the U-phase and V-phase bridge arm circuits to detect turn-on voltage drops of the corresponding switch tubes.
It can be understood that, in practical applications, for a one-phase bridge arm circuit in a through discharge state, as can be seen from the above, one of the upper bridge arm switching circuit and the lower bridge arm switching circuit is often in a switching state, the other is in a through state, or both are often in a switching state. Because the switch tubes in the upper bridge arm switch circuit and the lower bridge arm switch circuit are in the same type selection and are connected in series with each other, the currents flowing through the two switch tubes are the same. Therefore, in the present embodiment, referring to fig. 4, the voltage detection signal includes an upper bridge arm voltage detection signal and a lower bridge arm voltage detection signal;
each voltage detection assembly 10 includes an upper arm voltage detection assembly 1110 and a lower arm voltage detection assembly 1210;
an upper bridge arm switching circuit in one phase of bridge arm switching circuits correspondingly and electrically connected with the voltage detection assembly 10 is electrically connected with the upper bridge arm voltage detection assembly 1110; a lower bridge arm switch circuit in one phase of bridge arm switch circuits correspondingly and electrically connected with the voltage detection assembly 10 is electrically connected with the lower bridge arm voltage detection assembly 1210;
the upper bridge arm voltage detection assembly 1110 is used for detecting the switching-on voltage drop of a switching tube in an upper bridge arm switching circuit and outputting a corresponding upper bridge arm voltage detection signal;
and the lower bridge arm voltage detection assembly 1210 is used for detecting the switching-on voltage drop of a switching tube in the lower bridge arm switching circuit and outputting a corresponding lower bridge arm voltage detection signal.
In this embodiment, an alternative embodiment of the upper arm voltage detection assembly 1110 and the lower arm voltage detection assembly 1210 is the same as the voltage detection assembly 10, the upper arm voltage detection assembly 1110 is electrically connected to the drain of the upper arm switch tube, and the lower arm voltage detection assembly 1210 is electrically connected to the drain of the lower arm switch tube. Through the arrangement, in practical application, when the voltage detection assembly 10 corresponding to one of the bridge arms fails, the driving adjustment module 20 can still control the driving assembly 30 to adjust the current flowing through the bridge arm to be within the preset current interval according to the voltage detection signal output by the voltage detection assembly 10 corresponding to the other bridge arm, so that the redundancy capability of the through discharge control circuit in the through discharge process for performing short-circuit protection on the switch tube is improved.
In addition, it should be understood that, in practical applications, two switching tubes of the same phase bridge arm may be in different heat dissipation environments, and if only the switching tube in a good heat dissipation environment is currently detected, the switching tube in a normal heat dissipation environment is not detected. Then, when the short-circuit current flowing through the entire bridge arm is large and continues for a period of time, the switching tube that may be in a heat dissipation environment generally has an opening voltage drop that has already reached the preset alarm value, but the switching tube that is actually detected by the voltage detection assembly 10 has an opening voltage drop that has not yet reached the preset alarm value, which may cause the switching tube that is not detected by the voltage detection to be damaged. Therefore, the arrangement can also ensure that the upper and lower switch tubes are not damaged by over-temperature caused by overlarge short-circuit current for a long time and are not damaged by different heat dissipation environments of the two switch tubes.
Specifically, referring to fig. 2 and 7, the operation of performing the through discharge only in the U-phase bridge arm, in which the switching tubes of the U-phase upper bridge arm are in the switching state and the lower bridge arm is in the through state, and only the switching conduction voltage drop of the switching tubes of the U-phase upper bridge arm is detected will be described as an example. One skilled in the art can refer to fig. 7 to calibrate the current alarm voltage value according to the required upper limit of the preset current.
When the driving adjustment module 20 determines that the current switching voltage drop of the switching tube T1 reaches the alarm voltage value according to the voltage detection signal fed back by the voltage detection component 10, the driving adjustment module 30 is controlled to adjust the working state of the switching tube T1, for example, to reduce the duty ratio of the switching thereof, so as to reduce the flowing short-circuit current, thereby reducing the working temperature; or after the switch tube is in a complete off state for a certain preset time, and the temperature is reduced, the previous working state is restored again, so that the effective value of the short-circuit current flowing through the switch tube is obtained. So, in practical application, this application utilizes the switch tube when heavy current short circuit, and the switch tube moves back the output characteristic that the saturation in-process switched on the voltage drop and is showing the increase to when the voltage drop of opening of switch tube reached certain default, the operating condition of adjustment switch tube in time, with the electric current that reduces to flow through the switch tube, thereby play the effect of protection switch tube, guaranteed the stability of switch tube work. And the reliability and the safety of the vehicle driving module for direct discharge are improved.
The preset current interval is obtained and set after a plurality of tests are carried out by research personnel according to the working temperature capability of the actual switch tube, the use environment and the current resistance capability of the switch tube. Similarly, the alarm voltage value is set by a person skilled in the art according to the upper limit value of the preset current interval and the switching voltage drop of the switching tube corresponding to the upper limit value in fig. 8.
In addition, it can be understood that, in the present embodiment, the voltage detection component 10 and the driving adjustment module 20 may also be directly integrated into the driving component 30, for example, the driving component 30 is implemented by using an SIP package, so that the related circuits of the voltage detection component 10 and the driving adjustment module 20 and the circuit of the driving component 30 themselves are all integrated and disposed in the same chip, thereby effectively reducing the wiring area of the through discharge control circuit on the circuit board, and reducing the volume of the vehicle driving module.
The direct discharge control circuit comprises a voltage detection assembly 10 and a driving regulation module 20, wherein the voltage detection assembly 10 is used for detecting the switching-on voltage drop of a switching tube in a bridge arm switching circuit in a direct discharge state and outputting a corresponding voltage detection signal; the driving adjustment module 20 is configured to control the driving assembly 30 to adjust a working state of a corresponding switching tube according to the voltage detection signal, so that a current flowing through each phase bridge arm switching circuit in the through discharge state is within a preset safe current interval. So, in practical application, this application utilizes the switch tube when heavy current short circuit, and the switch tube moves back the output characteristic that the saturation in-process switched on the voltage drop and is showing the increase to when the voltage drop of opening of switch tube reached certain default, the operating condition of adjustment switch tube in time, with the electric current that reduces to flow through the switch tube, thereby play the effect of protection switch tube, guaranteed the stability of switch tube work. And the reliability and the safety of the vehicle driving module for direct discharge are improved. In addition, compared with the mode of realizing short-circuit protection by adopting temperature detection and the mode of current detection in the prior art, the scheme of detecting the opening voltage drop to realize short-circuit protection has higher sensitivity and adaptability, thereby further improving the working safety and stability of the switch tube.
In an embodiment of the present invention, referring to fig. 2, the driving adjustment module 20 is further configured to access a plurality of driving signals, and output the plurality of driving signals to the driving assembly 30, so that the driving assembly 30 controls at least one phase of bridge arm switch circuit in the three-phase inverter module to be in a through discharge state according to the plurality of driving signals;
the driving adjustment module 20 is further configured to adjust a duty ratio of a driving signal corresponding to the voltage detection signal when it is determined that the turn-on voltage drop of the switching tube flowing through the bridge arm switching circuit in the through discharge state reaches the alarm voltage value according to the voltage detection signal, so that the driving assembly 30 controls the corresponding switching tube to be in the off state within the remaining time of the current driving period.
In this implementation, the drive signal may be given by an external module, such as an external control module; the driving signal supplied from the outside may be a PWM signal with a certain duty ratio directly, or a signal with a set duty ratio is included, so that the driving adjustment module 20 generates a PWM signal with a corresponding duty ratio to the driving assembly 30 after receiving the driving signal.
It will be appreciated that in actual practice each phase bridge arm circuit comprises an upper bridge arm switching circuit and a lower bridge arm switching circuit. Therefore, the driving adjustment signal receives at least six driving signals to correspond to the switching tubes of each bridge arm, and outputs the driving signals to the driving assembly 30, so that the driving assembly 30 controls the switching tubes corresponding to the driving signals to work according to the driving signals.
Specifically, referring to fig. 2 and 7, the operation of performing the through discharge only in the U-phase bridge arm, in which the switching tubes of the U-phase upper bridge arm are in the switching state and the lower bridge arm is in the through state, and only the switching conduction voltage drop of the switching tubes of the U-phase upper bridge arm is detected will be described as an example. The detection and short-circuit protection implementation process principles in other embodiments of the circuit architecture are communicated, and are not described herein again.
Referring to fig. 7, in this example, the externally supplied driving signal is a driving signal with a duty ratio of 50%, and at time T1 in the driving period, the driving adjustment module 20 confirms that the current turn-on voltage drop of the switching tube T1 reaches the threshold value according to the feedback value of the voltage detection component 10, that is, the current short-circuit current of the switching tube T1 is too large, which results in too high temperature. The driving adjustment module 20 will directly adjust the duty ratio of the driving signal to zero in the remaining time of the current driving period (T1-T), i.e. in the remaining time of the current period, so that the driving assembly 30 controls the switching tube to be in the off state, thereby playing the role of protecting the switching tube. Wherein, the alarm voltage value is preset in advance by research personnel.
It is understood that, in another embodiment, the driving adjustment module 20 is further configured to, after adjusting the duty ratio of the driving signal corresponding to the driving module 30 so that the driving module 30 controls the corresponding switching tube to be in the off state within the remaining time of the current driving cycle, decrease the duty ratio of the driving signal corresponding to the switching tube and output the decreased duty ratio to the driving module 30, so that the driving module 30 controls the corresponding switching tube to return to the operating state from the off state according to the adjusted driving signal.
In this embodiment, optionally, the duty ratio of the driving signal may be decreased by a preset duty ratio (set in advance by a developer); optionally, a developer may also have duty ratios of a plurality of different gears in the driving adjustment module 20 in advance, and in the above process, the duty ratio of the driving signal may be reduced to the next gear and then output to the driving assembly 30.
Specifically, referring to fig. 2 and 7, the operation of performing the through discharge only in the U-phase bridge arm, in which the switching tubes of the U-phase upper bridge arm are in the switching state and the lower bridge arm is in the through state, and only the switching conduction voltage drop of the switching tubes of the U-phase upper bridge arm is detected will be described as an example. The detection and short-circuit protection implementation process principles in other embodiments of the circuit architecture are communicated, and are not described herein again.
Based on the above embodiment, after the duty ratio is adjusted to 0 at time T1 in the 0-T driving period, that is, after the switching tube is controlled to maintain the off state in the driving period from T1 to T, in the next driving period, that is, in the driving period from T to 2T, the driving adjustment module 20 reduces the duty ratio of the driving signal supplied from the outside to 25%, and then outputs the driving signal to the driving assembly 30, so that the driving assembly 30 controls the switching tube performing the short-circuit protection in the previous period to recover the switching working state according to the driving signal with the duty ratio of 25%. Therefore, through the arrangement, in practical application, when the short-circuit current of the switching tube is too large, the short-circuit current can be limited in time so as to reduce the temperature of the switching tube, and the switching tube is not completely turned off, so that the bridge arm circuit in direct discharge can be ensured to discharge the bus capacitor so as to reduce the voltage of the bus capacitor.
It can be understood that, in another embodiment, the driving adjustment module 20 is further configured to, when it is determined that the turn-on voltage drop flowing through the switching tube in the bridge arm switching circuit in the through discharge state does not reach the alarm voltage value according to the voltage detection signal, increase the duty ratio of the driving signal corresponding to the switching tube and output the driving signal to the driving assembly 30, so that the driving assembly 30 controls the corresponding switching tube to operate according to the adjusted driving signal.
In this embodiment, optionally, the duty ratio of the driving signal may be increased by a preset duty ratio (set in advance by those skilled in the art); alternatively, a person skilled in the art may also advance the duty ratios of a plurality of different gears in the driving adjustment module 20, and in the above process, the duty ratio of the driving signal may be increased to the next gear and then output to the driving assembly 30.
Specifically, referring to fig. 7 and fig. 2, an example will be described in which only the U-phase bridge arm performs a through discharge operation, the U-phase upper bridge arm switching tube is in a switching state, the lower bridge arm is in a through state, and only the switching conduction voltage drop of the U-phase upper bridge arm switching tube is detected. The detection and short-circuit protection implementation process principles in other embodiments of the circuit architecture are communicated, and are not described herein again.
Referring to fig. 7, in this example, the externally supplied driving signal is a driving signal with a duty ratio of 50%, and in this driving period, the driving adjustment module 20 determines, according to the feedback value of the voltage detection assembly 10, that the current on-voltage drop of the switching tube T1 does not reach the threshold, that is, when the short-circuit current of the switching tube T1 does not reach the threshold and/or the current temperature of the switching tube T1 does not reach the alarm temperature, the externally supplied driving signal is increased by a certain duty ratio and then output in the next driving period (T-2T), for example, the externally supplied driving signal is increased by 12.5% and then output to the driving assembly 30. It can be understood that, since the temperature of the switching tube does not rise instantaneously, in order to prevent the short-circuit current of the switching tube from being too large due to the duty ratio being suddenly adjusted when the temperature is not yet at the beginning, the driving adjustment module 20 may determine, in a plurality of driving cycles, that the duty ratio of the driving signal currently output to the switching tube does not cause the short-circuit current flowing through the switching tube to exceed a threshold value, and then, in the next cycle, increase the duty ratio of the driving signal given from the outside by a certain preset value and output the driving signal to the driving assembly 30, so as to ensure the stability of the operation of the switching tube. Therefore, in practical application, the duty ratio output to the switching tube can be made as high as possible, so that the circuit current flowing through the switching tube is ensured to be as large as possible, and the purpose of reducing the discharge time of the bus capacitor as much as possible is achieved. In addition, if the duty ratio of the driving signal supplied from the outside is too low, the duty ratio of the driving signal can be improved through the setting, so that the effect of accelerating the discharge of the bus capacitor is achieved.
It is understood that, in another embodiment, as can be seen from the above description, after the short-circuit protection is triggered by an excessive short-circuit current of the switching tube, the driving regulation module 20 reduces the duty ratio of the driving signal and then provides the reduced duty ratio to the driving assembly 30 in the next period of the external driving signal. At this time, the driving adjustment module 20 keeps the preset number of driving cycles of the driving signal after the duty ratio is reduced, and if the turn-on voltage drop of the switching tube still does not reach the alarm voltage value within the preset number of driving cycles, according to the above process, the duty ratio of the driving signal corresponding to the switch is increased and output to the driving assembly 30, so that after the temperature of the switching tube is reduced, the short-circuit current value is increased, and the effect of accelerating the discharge of the bus capacitor is also achieved while the switching tube is protected.
Referring to fig. 5-7, in an embodiment of the present invention, the voltage detection assembly 10 includes: a charging circuit 13, a first diode D1, a first comparator U2 and a first capacitor C1;
a positive phase input end of the first comparator U2, an anode of the first diode D1, and a first end of the first capacitor C1 are connected with an output end of the charging circuit 13; the cathode of the first diode D1 is connected with the drain electrode of the corresponding switch tube; the inverting input end of the first comparator U2 is used for accessing the alarm voltage Vref, and the output end of the first comparator U2 is electrically connected with the driving regulation module 20.
Referring to fig. 5, a description will be given of an example in which only the U-phase bridge arm performs a through discharge operation, the U-phase upper bridge arm switching tubes are in a switching state, the lower bridge arm is in a through state, and only the switching on/off voltage drop of the U-phase upper bridge arm switching tubes is detected. The detection and short-circuit protection implementation process principles in other embodiments of the circuit architecture are communicated, and are not described herein again.
Optionally, in this embodiment, the charging circuit 13 includes a current source; or, the output end of the voltage source is connected with the first end of the first resistor, and the second end of the first resistor is connected with the first end of the first capacitor C1.
Specifically, the alarm voltage Vref may be supplied from an external power supply unit, and the voltage of the vehicle battery is adjusted, for example, and then output to the inverting input terminal of the first comparator U2 as the alarm voltage Vref. It will be appreciated that the value of the alarm voltage Vref should be the alarm voltage Vref plus the turn-on voltage drop of the first diode D1 in the above-described embodiment.
In the process of carrying out through discharge in the U phase, the switch tube T1 is normally in a switch state, the charging circuit 13 charges the first capacitor C1, and as the cathode of the first diode D1 is connected with the drain electrode of the switch tube T1, namely the voltage of the current capacitor is limited to the switching-on voltage drop V of the switch tube T1 CE The voltage drop V of the first diode D1 d . At this time, if the switching tube T1 is not overcurrent, the first comparator U2 outputs a high level, as can be seen from the above embodiment, if the driving adjustment module 20 obtains a high level from the first comparator U2 in the current driving period, referring to fig. 7, the duty ratio of the driving signal is increased and the driving component 30 is output to the controlled end of the switching tube T1 in the next driving period (T-2T).
At this time, if the short-circuit current of the switching tube T1 is too large, and the voltage of the first capacitor C1 exceeds the alarm voltage Vref, that is, the current turn-on voltage drop of the switching tube is already greater than the alarm voltage Vref, at this time, the first comparator U2 outputs a low level signal to the driving adjustment module 20. After the driving adjustment module 20 receives the low level signal, as can be seen from the content of the above embodiment, referring to fig. 7, when the driving adjustment module 20 receives the low level signal, the driving assembly 30 is directly controlled to turn off the switching tube T1 within the remaining time of the current driving period, so that the switching tube is protected in time, and the switching tube is prevented from being damaged due to over-temperature caused by over-current. And in the subsequent driving period, the duty ratio of the driving signal supplied from the outside is reduced and then output to the driving assembly 30, so that the driving assembly 30 controls the corresponding switch tube to operate according to the driving signal with the reduced duty ratio.
In addition, it should be understood that, due to the above circuit, when the switching tube is in the off state due to the over-large short-circuit current, the voltage at the position of the drain of the switching tube T1 is the voltage of the bus capacitor at this time, and is reversely cut off by the diode. Therefore, in order to ensure the detection of the turn-on voltage drop of the switching tube driven by the subsequent driving signal, in the embodiment, the driving component 30 is electrically connected to the first end of the first capacitor C1; the driving component 30 is further configured to discharge the first capacitor C1 when controlling the corresponding switch tube to be in an off state.
In this embodiment, the driving assembly 30 may further be provided with a discharging assembly, the discharging assembly may be composed of a discharging switch and a discharging load connected in series in sequence, and when the control unit inside the driving assembly 30 determines that the currently output driving signal is at a low level, that is, when the control switch tube is in the open state, the discharging switch is controlled to be in the closed state, so as to turn on a path between the first capacitor C1 and the discharging load, so as to discharge the first capacitor C1. Meanwhile, correspondingly, before the next driving cycle of the external driving signal comes, the driving adjustment module 20 always drives the driving assembly 30 to control the corresponding switch tube to be in the off state, and does not perform the above-mentioned external driving signal adjustment process according to the signal output by the first comparator U2.
Optionally, in another embodiment, the discharging component may be further integrated in the driving adjustment module 20, and as described above, the driving adjustment module 20 may include a main control module and a peripheral circuit thereof, and the main control module in the driving adjustment module 20 determines that the short-circuit current of the current switching tube T1 is too large, and then controls the duty ratio of the driving signal output to the driving component 30 in the current driving period to be zero, and discharges the first capacitor C1 in the above circuit process.
So, through above-mentioned setting, can realize flowing through the restriction that is in the switch tube short-circuit current of direct discharge state to make short-circuit current can keep in certain extent, thereby when having played the effect of protection switch tube, can also guarantee that short-circuit current is big as far as possible so that the discharge time of bus capacitor can be as far as possible short. Meanwhile, compared with a resistance voltage division circuit, the circuit has higher detection accuracy. It should be understood that, when the switching tube is in the off state, the voltage of the drain of the switching tube T1 is the voltage value of the bus capacitor. In other words, the voltage detection is performed by using the resistance voltage-dividing circuit, in order to ensure that the driving adjustment module 20 can normally receive the voltage detection signal, the resistance ratio of the resistance voltage-dividing circuit not only needs to be adapted to the value of the switching tube switching voltage drop, but also needs to be adapted to the voltage value of the bus capacitor, because the voltage of the bus capacitor is generally much greater than the value of the switching tube switching voltage drop, the resistance ratio needs to be particularly small, for example, the voltage of the switching tube drain is reduced by 10 times and then output, just it can be ensured that the voltage detection signal output by the resistance voltage-dividing circuit does not damage the driving adjustment module 20 when the switching tube is disconnected, but this can cause the accuracy reduction when the switching tube switching voltage drop is detected.
The invention also provides a vehicle driving module which comprises a three-phase inversion module and the direct discharge control circuit.
It should be noted that, because the vehicle driving module of the present invention is based on the through discharge control circuit, the embodiment of the vehicle driving module of the present invention includes all technical solutions of all embodiments of the through discharge control circuit, and the achieved technical effects are also completely the same, and are not described herein again.
The invention further provides an automobile comprising the automobile driving module.
It should be noted that, because the vehicle of the present invention is based on the vehicle driving module, the embodiment of the vehicle of the present invention includes all technical solutions of all embodiments of the vehicle driving module, and the achieved technical effects are also completely the same, and are not described herein again.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A through discharge control circuit is applied to a vehicle driving module, the vehicle driving module comprises a three-phase inversion module, the through discharge control circuit comprises a driving component, the driving component is used for controlling at least one phase of bridge arm switch circuit in the three-phase inversion module to be in a through discharge state, and the through discharge control circuit is characterized by further comprising:
the voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in the bridge arm switching circuit in the direct discharge state and outputting a corresponding voltage detection signal;
the driving adjusting module is electrically connected with the voltage detecting assembly and the driving assembly respectively; the driving adjusting module is used for controlling the driving assembly to adjust the working state of the corresponding switch tube according to the voltage detection signal, so that the current flowing through each phase of bridge arm switch circuit in the through discharge state is within a preset safe current interval.
2. The through-discharge control circuit according to claim 1, wherein N-phase bridge arm switch circuits in the three-phase inverter module are configured for through-discharge, the number of the voltage detection assemblies is correspondingly configured to be N, the N voltage detection assemblies are electrically connected to the N-phase bridge arm switch circuits for through-discharge in a one-to-one correspondence, and N is greater than or equal to 1.
3. The through-discharge control circuit according to claim 2, wherein the voltage detection component is electrically connected to an upper arm switch circuit or a lower arm switch circuit in a one-phase arm switch circuit in a through-discharge state; the voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in the upper bridge arm switching circuit or the switching-on voltage drop of a switching tube in the lower bridge arm switching circuit and outputting a corresponding voltage detection signal.
4. The through discharge control circuit of claim 2, wherein the voltage detection signal comprises an upper leg voltage detection signal and a lower leg voltage detection signal;
each voltage detection assembly comprises an upper bridge arm voltage detection assembly and a lower bridge arm voltage detection assembly;
an upper bridge arm switching circuit in one phase of bridge arm switching circuits correspondingly and electrically connected with the voltage detection assembly is electrically connected with the upper bridge arm voltage detection assembly; a lower bridge arm switching circuit in one phase of bridge arm switching circuits correspondingly and electrically connected with the voltage detection assembly is electrically connected with the lower bridge arm voltage detection assembly;
the upper bridge arm voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in an upper bridge arm switching circuit and outputting a corresponding upper bridge arm voltage detection signal;
the lower bridge arm voltage detection assembly is used for detecting the switching-on voltage drop of a switching tube in a lower bridge arm switching circuit and outputting a corresponding lower bridge arm voltage detection signal.
5. The through discharge control circuit according to claim 1, wherein the driving adjustment module is further configured to access a plurality of driving signals and output the plurality of driving signals to the driving component, so that the driving component controls at least one phase of bridge arm switch circuit in the three-phase inverter module to be in a through discharge state according to the plurality of driving signals;
and the driving regulation module is also used for adjusting the duty ratio of the driving signal corresponding to the voltage detection signal when the voltage detection signal determines that the switching-on voltage drop of the switching tube in the bridge arm switching circuit in the through discharge state reaches the alarm voltage value, so that the driving component controls the corresponding switching tube to be in the off state in the remaining time of the current driving period.
6. The through discharge control circuit according to claim 5, wherein the driving adjustment module is further configured to, after adjusting the duty ratio of the driving signal corresponding thereto so that the driving component controls the corresponding switching tube to be in the off state within the remaining time of the current driving cycle, decrease the duty ratio of the driving signal corresponding to the switching tube and output the decreased duty ratio to the driving component, so that the driving component controls the corresponding switching tube to recover from the off state to the operating state according to the adjusted driving signal.
7. The through discharge control circuit according to claim 5, wherein the driving adjustment module is further configured to, when it is determined according to the voltage detection signal that the turn-on voltage drop across the switching tube in the bridge arm switching circuit in the through discharge state does not reach the alarm voltage value, increase a duty ratio of the driving signal corresponding to the switching tube and output the driving signal to the driving assembly, so that the driving assembly controls the corresponding switching tube to operate according to the adjusted driving signal.
8. The shoot-through discharge control circuit of claim 3 or 4 wherein the voltage detection component comprises: the circuit comprises a charging circuit, a first diode, a first comparator and a first capacitor;
the positive phase input end of the first comparator, the anode of the first diode, and the first end of the first capacitor are connected with the output end of the charging circuit; the cathode of the first diode is connected with the drain electrode of the corresponding switch tube; the inverting input end of the first comparator is used for accessing alarm voltage, and the output end of the first comparator is electrically connected with the driving regulation module.
9. The feedthrough discharge control circuit of claim 8, wherein the charging circuit comprises a current source; alternatively, the first and second electrodes may be,
the output end of the voltage source is connected with the first end of the first resistor, and the second end of the first resistor is connected with the first end of the first capacitor.
10. The shoot-through discharge control circuit of claim 8 wherein the drive component is electrically connected to the first terminal of the first capacitor; the driving assembly is further used for discharging the first capacitor when the corresponding switching tube is controlled to be in an off state.
11. The shoot-through control circuit of claim 1 wherein the voltage detection component and the drive regulation module are integrated within the drive component.
12. A vehicle drive module comprising a three-phase inverter module and a shoot-through discharge control circuit as claimed in any one of claims 1 to 11.
13. An automobile, characterized by comprising the vehicle drive module according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395722.2A CN115622472A (en) | 2022-11-08 | 2022-11-08 | Straight-through discharge control circuit, vehicle driving module and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395722.2A CN115622472A (en) | 2022-11-08 | 2022-11-08 | Straight-through discharge control circuit, vehicle driving module and automobile |
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| Publication Number | Publication Date |
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| CN115622472A true CN115622472A (en) | 2023-01-17 |
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|---|---|---|---|
| CN202211395722.2A Pending CN115622472A (en) | 2022-11-08 | 2022-11-08 | Straight-through discharge control circuit, vehicle driving module and automobile |
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| Country | Link |
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| CN (1) | CN115622472A (en) |
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2022
- 2022-11-08 CN CN202211395722.2A patent/CN115622472A/en active Pending
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