CN113872316A - Motor controller of new energy automobile and vehicle - Google Patents
Motor controller of new energy automobile and vehicle Download PDFInfo
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- CN113872316A CN113872316A CN202111161038.3A CN202111161038A CN113872316A CN 113872316 A CN113872316 A CN 113872316A CN 202111161038 A CN202111161038 A CN 202111161038A CN 113872316 A CN113872316 A CN 113872316A
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- module
- power supply
- voltage
- detection module
- motor controller
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention relates to a motor controller of a new energy automobile and the automobile, wherein the motor controller comprises: a power supply module; a backup power module; an IGBT driving module; an IGBT; the first IGBT driving power supply and the second IGBT driving power supply; a fault detection module; a line voltage frequency detection module; a phase current frequency detection module; a drive logic module; a CPLD device; a power management module; a rotary-change signal processing module; the analog quantity signal acquisition and processing module; the processor controls the driving logic module to drive the IGBT driving module to enter a corresponding state according to a processing signal of the rotary transformer signal processing module, a detection signal of the line voltage frequency detection module, a detection signal of the phase current frequency detection module, a fault signal of the fault detection module and/or an analog quantity signal of the analog quantity signal acquisition processing module, so that high-side ASC and low-side ASC switching can be performed under various working conditions, and different safety states ASC and SPO switching can be performed according to vehicle speed.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a motor controller of a new energy automobile and a vehicle.
Background
In the related art, the hardware architecture of the motor controller mainly includes the following three types: (1) the power supply depends on a low-voltage battery to supply power without a backup power supply; (2) only the power supply at the high-voltage side is backed up and is provided with a hardware fault processing module; (3) the control system is completely backed up by power supply and is provided with a hardware fault processing module.
However, for the type (1), a backup power supply is lost, and an Active Short Circuit (ASC) safety state cannot be entered under a low-voltage power supply fault condition, so that potential safety hazards exist; for the type (2), only the high-voltage side backup power supply and the hardware fault processing module are provided, the low-voltage power supply fault or the single chip microcomputer fault can only enter the low-side ASC state, the high-side ASC and the low-side ASC cannot be switched, and the single chip microcomputer fault or the rotational transformation fault cannot be switched between the ASC and the SPO (Safety Pulse Off) in different Safety states; for the type (3), the single chip microcomputer can only enter the low-side ASC state under the fault working condition or the rotational fault working condition, and cannot switch between the high-side ASC and the low-side ASC, and the single chip microcomputer cannot switch between the ASC and the SPO in different safety states under the fault working condition or the rotational fault working condition, which needs to be solved urgently.
Disclosure of Invention
In view of this, the present invention is directed to a motor controller of a new energy vehicle, which solves the problems in the related art that a low-voltage power failure condition cannot enter an ASC safety state, a low-voltage power failure, or a single chip microcomputer failure condition cannot perform high-side ASC and low-side ASC switching, and a single chip microcomputer failure or a rotational shift failure condition cannot perform different safety state ASC and SPO switching, so that the high-side ASC and the low-side ASC switching can be performed under various conditions, and the different safety state ASC and SPO switching can be performed according to a vehicle speed, thereby meeting a functional safety requirement of the motor controller.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the motor controller of the new energy automobile is characterized by comprising the following steps:
the power module is connected with the storage battery and supplies power to the motor controller;
the backup power supply module is connected with the power battery and supplies power to the motor controller when the power supply module fails;
the IGBT driving module and the IGBT driven by the IGBT driving module are used for driving a driving motor of a vehicle to output torque;
the first IGBT driving power supply supplies power to a low-side power supply circuit of the IGBT driving module, and the second IGBT driving power supply supplies power to a high-side power supply circuit of the IGBT driving module;
the fault detection module is used for detecting a fault signal of the motor controller;
the device comprises a line voltage frequency detection module and a phase current frequency detection module, wherein the line voltage frequency detection module and the phase current frequency detection module are respectively used for detecting a first rotating speed under an SPO working condition and a second rotating speed under an ASC working condition;
a drive logic module;
a CPLD (Complex Programmable logic device) device, connected to the power module, for controlling the driving logic module to drive the IGBT driving module to enter a corresponding state according to the first rotation speed and/or the second rotation speed;
the power supply management module is connected with the power supply module and the backup power supply module;
the rotary transformer signal processing module is connected with the power supply module and the backup power supply module;
the analog quantity signal acquisition processing module is used for acquiring an analog quantity signal of the vehicle;
and the processor is used for controlling the driving logic module to drive the IGBT driving module to enter a corresponding state according to a processing signal of the rotary transformer signal processing module, a detection signal of the line voltage frequency detection module, a detection signal of the phase current frequency detection module, a fault signal of the fault detection module and/or an analog quantity signal of the analog quantity signal acquisition processing module, wherein the state comprises a low-side ASC, a high-side ASC, an SPO and different safety states.
Further, the fault detection module includes:
the low-voltage and under-voltage detection module is used for detecting whether the low-voltage side of the motor controller is under-voltage or not;
the high-voltage bus under-voltage detection module is used for detecting whether a high-voltage bus of the motor controller is under-voltage or not;
the high-voltage bus overvoltage detection module is used for detecting whether the high-voltage bus is overvoltage or not;
the motor phase current overcurrent detection module is used for detecting whether the motor phase current of the driving motor is overcurrent or not;
and the IGBT driving fault detection module is used for detecting whether the IGBT driving module is in fault or not.
Further, the analog signal acquisition and processing module comprises:
each power supply output voltage detection module is used for detecting the output voltages of the power supply module and the backup power supply module;
the low-voltage battery voltage detection module is used for detecting the actual voltage of the power supply module;
the high-voltage bus voltage detection module is used for detecting the actual voltage of the high-voltage bus;
the high-voltage bus current detection module is used for detecting the actual current of the high-voltage bus;
the motor phase current detection module is used for detecting the motor phase current of the driving motor;
the motor winding temperature detection module is used for detecting the actual motor winding temperature of the driving motor;
the IGBT temperature detection module is used for detecting the actual temperature of the IGBT driving module;
and the cooling liquid temperature detection module is used for detecting the actual cooling liquid temperature of the driving motor.
Further, still include:
and the communication module is in CAN communication with the vehicle control unit.
Further, still include:
the first overvoltage protection module is arranged corresponding to the power supply module and used for disconnecting a first power supply circuit of the power supply module when the power supply module fails;
and the second overvoltage protection module is arranged corresponding to the backup power supply module and is used for disconnecting a second power supply circuit of the backup power supply module when the backup power supply module fails.
Further, still include:
a first overcurrent protection module of a first diode is arranged between the first overcurrent protection module and the first overvoltage protection module and is used for limiting the actual current of the first power supply circuit within a preset range;
and a second over-current protection module of a second diode is arranged between the second over-voltage protection module and the second over-current protection module, and is used for limiting the actual current of the second power supply circuit within the preset range.
Furthermore, the anode of the first diode is connected with the first overvoltage protection module, the cathode of the first diode is connected with the first overcurrent protection module, the anode of the second diode is connected with the second overvoltage protection module, and the cathode of the second diode is connected with the second overcurrent protection module.
Further, still include:
one end of the DC/DC converter is connected with the first overcurrent protection module, and the other end of the DC/DC converter is connected with the CPLD device.
Further, still include:
and the active discharging module is connected with the CPLD device and is used for actively discharging according to a discharging instruction of the CPLD device.
Compared with the prior art, the motor controller of the new energy automobile has the following advantages:
according to the motor controller of the new energy automobile, the backup power supply, the motor voltage and current frequency detection, the CPLD device and the processor double-controller fault control logic are deeply integrated, so that the problems that a low-voltage power supply fault working condition cannot enter an ASC (automatic switching control) safety state, a low-voltage power supply fault or a single chip microcomputer cannot switch between a high-side ASC and a low-side ASC under a fault working condition and a single chip microcomputer cannot switch between different safety states ASC and SPO under a fault working condition or a rotation fault working condition in the related technology are solved, the high-side ASC and the low-side ASC can be switched under various working conditions, the ASC and the SPO can be switched under different safety states according to the automobile speed, and the functional safety requirements of the motor controller are met.
Another object of the present invention is to provide a vehicle, which solves the problems in the related art that the low-voltage power failure condition cannot enter the ASC safe state, the low-voltage power failure or the single chip microcomputer failure condition cannot perform the high-side ASC and low-side ASC switching, and the single chip microcomputer failure or the rotational shift failure condition cannot perform the ASC and SPO switching in different safe states, so that the high-side ASC and low-side ASC switching can be performed in various conditions, and the ASC and SPO switching in different safe states can be performed according to the vehicle speed, thereby meeting the functional safety requirements of the motor controller.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with the motor controller of the new energy automobile.
Compared with the prior art, the motor controller of the vehicle and the new energy automobile has the same advantages, and the description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic block diagram of a motor controller of a new energy vehicle according to an embodiment of the present invention;
FIG. 2 is a block diagram of a fault detection module according to an embodiment of the invention;
fig. 3 is a schematic block diagram of an analog signal acquisition and processing module according to an embodiment of the present invention;
fig. 4 is a block diagram of a motor controller of a new energy vehicle according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a block diagram schematically illustrating a motor controller of a new energy vehicle according to an embodiment of the present invention.
As shown in fig. 1, a motor controller 100 of a new energy vehicle according to an embodiment of the present invention includes: the device comprises a power module 1, a backup power module 2, an IGBT driving module 3, an IGBT4, a first IGBT driving power supply 5, a second IGBT driving power supply 6, a fault detection module 7, a line voltage frequency detection module 8, a phase current frequency detection module 9, a driving logic module 10, a CPLD device 11, a power management module 12, a rotary transformer signal processing module 13, an analog quantity signal acquisition processing module 14 and a processor 15.
Wherein, power module 1 is connected with the battery, and power module 1 supplies power for motor controller 100. The backup power module 2 is connected with the power battery, and when the power module 1 fails, the backup power module 2 supplies power to the motor controller 100. The IGBT driving module 3 and the IGBT4 driven by the IGBT driving module 3 drive the driving motor of the vehicle to output torque. First IGBT drive power supply 5 links to each other with power module 1 and backup power module 2 simultaneously, and second IGBT drive power supply 6 links to each other with power module 1 and backup power module 2 simultaneously, first IGBT drive power supply 5 can be for IGBT drive module 3's low limit supply circuit power supply, second IGBT drive power supply 6 can be for IGBT drive module 3's high limit supply circuit power supply, and, when having one to go wrong in power module 1 and backup power module 2, can supply power through another power module, each other of having realized the power is backup. And the fault detection module 7 is used for detecting a fault signal of the motor controller. The line voltage frequency detection module 8 and the phase current frequency detection module 9 are respectively used for detecting a first rotating speed under the SPO working condition and a second rotating speed under the ASC working condition. The CPLD device 11 is connected with the power module 1 and is used for controlling the driving logic module 10 to drive the IGBT driving module 3 to enter a corresponding state according to the first rotating speed and/or the second rotating speed. And a power management module 12 connected to the power module 1 and the backup power module 2. And the rotary-change signal processing module 13 is connected with the power supply module 1 and the backup power supply module 2. And the analog quantity signal acquisition and processing module 14 is used for acquiring the analog quantity signal of the vehicle. The processor 15 is configured to control the driving logic module 10 to drive the IGBT driving module 3 to enter a corresponding state according to a processing signal of the resolver signal processing module 13, a detection signal of the line voltage frequency detection module 8, a detection signal of the phase current frequency detection module 9, a fault signal of the fault detection module 7, and/or an analog signal of the analog signal acquisition processing module 14, where the state includes a low-side ASC, a high-side ASC, an SPO, and different safety states.
Further, in some embodiments, as shown in fig. 2, the fault detection module 7 includes: the system comprises a low-voltage and undervoltage detection module 71, a high-voltage bus undervoltage detection module 72, a high-voltage bus overvoltage detection module 73, a motor phase current overcurrent detection module 74 and an IGBT drive fault detection module 75. The low-voltage and under-voltage detection module 71 is configured to detect whether a low-voltage side of the motor controller is under-voltage; a high-voltage bus under-voltage detection module 72 for detecting whether the high-voltage bus of the motor controller is under-voltage; the high-voltage bus overvoltage detection module 73 is used for detecting whether the high-voltage bus is overvoltage or not; a motor phase current overcurrent detection module 74 for detecting whether a motor phase current of the drive motor is overcurrent; and the IGBT driving failure detection module 75 is configured to detect whether the IGBT driving module 3 fails. That is, as shown in fig. 1 and 2, the fault detection module 7 may be connected to the CPLD device 11 and the processor 15. The fault detection module 7 may detect various faults of the motor controller 100
Further, in some embodiments, the analog signal collection processing module 14 may be connected to the processor 15 for analog-to-digital conversion, as shown in fig. 3, and the analog signal collection processing module 14 includes: the system comprises a power output voltage detection module 141, a low-voltage battery voltage detection module 142, a high-voltage bus voltage detection module 143, a high-voltage bus current detection module 144, a motor phase current detection module 145, a motor winding temperature detection module 146, an IGBT temperature detection module 147 and a coolant temperature detection module 148. The power output voltage detection module 141 is used for detecting the output voltages of the power module 1 and the backup power module 2; a low-voltage battery voltage detection module 142 for detecting an actual voltage of the power module 1; a high-voltage bus voltage detection module 143, configured to detect an actual voltage of the high-voltage bus; a high voltage bus current detection module 144 for detecting an actual current of the high voltage bus; a motor phase current detection module 145 for detecting a motor phase current of the driving motor; a motor winding temperature detection module 146 for detecting an actual motor winding temperature of the driving motor; the IGBT temperature detection module 147 is used for detecting the actual temperature of the IGBT driving module 3; and a coolant temperature detection module 148 for detecting an actual coolant temperature of the driving motor.
It should be understood that the power module 1 may be a low-voltage power module, the power module 1 is connected to a storage battery, and the power module 1 serves as a power supply of the motor controller 100 to supply power to the motor controller 100, wherein for a power supply circuit, the embodiment of the present invention may be implemented in the form of a non-isolated Buck-Boost circuit, a Sepic circuit, or an isolated flyback circuit, which is not specifically limited herein.
The backup power module 2 may be a high-voltage backup power supply, the backup power module 2 may be connected to a high-voltage power battery of the vehicle, and when the power module 1 fails, the backup power module 2 is used as a power supply of the motor controller 100.
The IGBT driver module 3 may control the IGBT4 to switch by receiving the control signal from the driver logic module 10, and has protection functions such as desaturation detection and miller clamp.
The IGBT4 can receive the signal from the IGBT drive module 3 to drive the motor to operate, and realize safety states such as low-side ASC, high-side ASC, SPO, and the like under abnormal conditions of the motor controller 100.
The first IGBT driving power supply 5 supplies power for the low side driving of the IGBT driving module 3, the second IGBT driving power supply 6 supplies power for the high side driving of the IGBT driving module 3, and the first IGBT driving power supply 5 and the second IGBT driving power supply 6 are separately and independently supplied with power.
The line voltage frequency detection module 8 detects the line voltage or the frequency of the phase voltage of the motor under the SPO working condition and sends the line voltage or the frequency of the phase voltage to the CPLD device 11 and the processor 15, and when the rotary transformer is in the SPO safety state, the processor 15 can obtain the rotating speed of the motor by depending on the line voltage frequency detection module 8, so that vehicle speed information is provided for realizing the strategy switching of entering ASC at a high vehicle speed and entering SPO at a low vehicle speed. When the processor 15 is in fault and the motor controller 100 is in the SPO safe state, the CPLD device 11 can obtain the motor rotation speed by means of the line voltage frequency detection module 8, thereby realizing the strategy switching of entering ASC at a high vehicle speed and entering SPO at a low vehicle speed, and meeting the functional safety requirement.
The phase current frequency detection module 9 detects the frequency of the motor phase current under the ASC working condition and sends the frequency to the CPLD device 11 and the processor 15, and the processor 15 can obtain the motor rotating speed by depending on the phase current frequency detection module 9 in the ASC safe state during the rotary transformer fault, thereby providing the vehicle speed information for realizing the strategy switching of entering the ASC at a high vehicle speed and entering the SPO at a low vehicle speed. When the processor 15 is in fault and the motor controller 100 is in an ASC safe state, the CPLD device 11 can obtain the motor rotation speed by means of the phase current frequency detection module 9, thereby realizing the strategy switching from a high vehicle speed entering ASC to a low vehicle speed entering SPO, and satisfying the functional safety requirement.
The driving logic module 10 receives the PWM signals and control signals of the CPLD device 11 and the processor 15 to realize the switching of the PWM control right and the state feedback, and controls the IGBT to operate through the IGBT driving module 3.
The CPLD device 11 receives a fault signal through the fault detection module 7, and respectively obtains rotating speed information under the working conditions of the SPO and the ASC through the line voltage frequency detection module 8 and the phase current frequency detection module 9, the CPLD device 11 can realize the switching of the low-side ASC, the high-side ASC and the SPO and different safety states under the control of the driving logic module 10 and the IGBT driving module 3, the CPLD device 11 can be connected with a processor 15 (such as a singlechip) to exchange information through the SPI or other modes, and the CPLD device 11 can also be used as an external watchdog of the processor 15.
The power management module 12 supplies power to the single chip microcomputer, and generally adopts a power management chip with multi-path output; the rotary transformer signal processing module 13 comprises a rotary transformer excitation circuit and a SIN/COS feedback signal processing circuit, and may adopt a hard decoding scheme or a soft decoding scheme
The processor 15 can receive signals of the fault detection module 7, the line voltage frequency detection module 8, the phase current frequency detection module 9, the rotary transformer signal processing module 13 and the analog quantity signal acquisition processing module 14, so that the IGBT4 is controlled by the driving logic module 10 and the IGBT driving module 3 to realize control of the normal working condition of the motor and switching of the low-side ASC, the high-side ASC, the SPO and different safety states under the abnormal working condition.
Further, in some embodiments, as shown in fig. 4, the motor controller 100 of the new energy vehicle according to the embodiment of the present invention further includes: a communication module 16. The communication module 16 communicates with the vehicle control unit in a CAN manner.
It should be understood that, as shown in fig. 4, the communication module 16 may be a CAN communication module, and the communication module 16 serves as a communication interface between the motor controller 100 and the vehicle control unit, and has any frame or specific frame wake-up function enabling the power module 1.
Further, in some embodiments, as shown in fig. 4, the motor controller 100 of the new energy vehicle according to the embodiment of the present invention further includes: a first overvoltage protection module 17 and a second overvoltage protection module 18. The first overvoltage protection module 17 is arranged corresponding to the power module 1, and the first overvoltage protection module 17 is used for disconnecting a first power supply circuit of the power module 1 when the power module 1 fails; the second overvoltage protection module 18 is disposed corresponding to the backup power module 2, and the second overvoltage protection module 18 is configured to disconnect a second power supply circuit of the backup power module 2 when the backup power module 2 fails.
Specifically, as shown in fig. 4, the first overvoltage protection module 17 is connected to the power module 1, and when the output voltage of the power module 1 fails due to overvoltage, the connection with the rear stage is timely disconnected, so that the rear stage module is prevented from failing due to overhigh voltage; the second overvoltage protection module 18 is connected with the backup power module 2, and when the output voltage of the backup power module 2 is in overvoltage fault, the connection with the rear stage is timely disconnected, so that the rear stage module is prevented from being out of work due to overhigh voltage.
Further, in some embodiments, as shown in fig. 4, the motor controller 100 of the new energy vehicle according to the embodiment of the present invention further includes: a first overcurrent protection module 19 and a second overcurrent protection module 20. A first over-current protection module 19 having a first diode (e.g., D1 and D2) disposed between the first over-voltage protection module 17 and the first over-voltage protection module, for limiting the actual current of the first power supply circuit within a preset range; and a second over-current protection module 20 having a second diode (e.g., D3 and D4) is disposed between the second over-voltage protection module 18 and the second over-current protection module for limiting the actual current of the second power supply circuit within a preset range.
In some embodiments, as shown in fig. 4, the anode of the first diode is connected to the first overvoltage protection module 17, the cathode of the first diode is connected to the first overcurrent protection module 19, the anode of the second diode is connected to the second overvoltage protection module 18, and the cathode of the second diode is connected to the second overcurrent protection module 20.
Further, in some embodiments, as shown in fig. 4, the motor controller 100 of the new energy vehicle according to the embodiment of the present invention further includes: a DC/DC converter 21. One end of the DC/DC converter 21 is connected to the first overcurrent protection module 19, and the other end of the DC/DC converter 21 is connected to the CPLD device 11.
Specifically, as shown in fig. 4, the number of the first diodes and the number of the second diodes may be two, and the first overcurrent protection module 19 is connected to the power module 1 and the backup power module 2 through the two first diodes, outputs the signals through the first overvoltage protection module 17, and supplies power to the second IGBT driving power supply 6 and the DC/DC converter 21. The first overcurrent protection module 19 has current monitoring and current limiting functions, and can limit current within a preset range when a rear-stage short circuit occurs, so that the situation that the output of the power module 1 and the output of the backup power module 2 are pulled down due to a large current of the rear-stage short circuit to influence the work of other circuits is avoided.
The second overcurrent protection module 20 is connected with the power module 1 and the backup power module 2 through two second diodes, outputs through the first overvoltage protection module 18, and supplies power to the first IGBT driving power supply 5, the power management module 12, and the rotary transformer signal processing module 13. The second overcurrent protection module 20 has current monitoring and current limiting functions, and when the rear stage is short-circuited, the current can be limited within a preset range, so that the situation that the output of the power module 1 and the output of the backup power module 2 are pulled down due to the large current of the rear stage short-circuited to influence the work of other circuits is avoided.
The DC/DC converter 21 supplies power to the CPLD device 11 and can be realized by adopting an LDO (low dropout regulator)
Further, in some embodiments, as shown in fig. 4, the motor controller 100 of the new energy vehicle according to the embodiment of the present invention further includes: an active discharge module 22. The active discharge module 22 is connected to the CPLD device 11, and the active discharge module 22 performs active discharge according to a discharge instruction of the CPLD device 11.
Specifically, the active discharge module 22 is an independent hardware active discharge, and is controlled by the processor 15 or the CPLD device 11 to reduce the voltage on the high-voltage bus to below the safe voltage 60V within a predetermined time, and may use resistance discharge such as a PTC resistor, a thick-film power resistor, a resistor array, or other forms of discharge such as power device constant-current discharge or backup power load discharge.
According to the motor controller of the new energy automobile provided by the embodiment of the invention, the problems that a low-voltage power supply fault working condition cannot enter an ASC (automatic switched capacitor) safety state, a low-voltage power supply fault or a single chip microcomputer cannot switch between a high-side ASC and a low-side ASC under a fault working condition and cannot switch between different safety states ASC and SPO (static synchronous compensator) under a fault working condition or a rotational fault working condition in the related technology are solved by deeply integrating the backup power supply, the voltage and current frequency detection of the motor, the CPLD device and the fault control logic of the processor double controller, and the ASC and the SPO in different safety states can be switched under various working conditions, so that the ASC and the SPO in different safety states can be switched according to the speed of the vehicle, and the functional safety requirements of the motor controller are met.
Further, the embodiment of the invention discloses a vehicle which is provided with the motor controller of the new energy automobile. This vehicle has been owing to had above-mentioned new energy automobile's machine controller, solved the unable ASC safe state that gets into of low pressure power failure operating mode, the unable high side ASC of low pressure power failure or singlechip trouble operating mode and the switching of low side ASC to and the unable problem that carries out different safe state ASC and SPO under singlechip trouble or the rotatory fault operating mode that exists among the correlation technique and switched for all can carry out high side ASC and low side ASC and switch under the various operating modes, and can carry out different safe state ASC and SPO according to the speed of a motor vehicle and switch, satisfy machine controller's functional safety requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The motor controller of the new energy automobile is characterized by comprising the following steps:
the power module is connected with the storage battery and supplies power to the motor controller;
the backup power supply module is connected with the power battery and supplies power to the motor controller when the power supply module fails;
the IGBT driving module and the IGBT driven by the IGBT driving module are used for driving a driving motor of a vehicle to output torque;
the first IGBT driving power supply supplies power to a low-side power supply circuit of the IGBT driving module, and the second IGBT driving power supply supplies power to a high-side power supply circuit of the IGBT driving module;
the fault detection module is used for detecting a fault signal of the motor controller;
the device comprises a line voltage frequency detection module and a phase current frequency detection module, wherein the line voltage frequency detection module and the phase current frequency detection module are respectively used for detecting a first rotating speed under an SPO working condition and a second rotating speed under an ASC working condition;
a drive logic module;
the CPLD device is connected with the power module and is used for controlling the driving logic module to drive the IGBT driving module to enter a corresponding state according to the first rotating speed and/or the second rotating speed;
the power supply management module is connected with the power supply module and the backup power supply module;
the rotary transformer signal processing module is connected with the power supply module and the backup power supply module;
the analog quantity signal acquisition processing module is used for acquiring an analog quantity signal of the vehicle;
and the processor is used for controlling the driving logic module to drive the IGBT driving module to enter a corresponding state according to a processing signal of the rotary transformer signal processing module, a detection signal of the line voltage frequency detection module, a detection signal of the phase current frequency detection module, a fault signal of the fault detection module and/or an analog quantity signal of the analog quantity signal acquisition processing module, wherein the state comprises a low-side ASC, a high-side ASC, an SPO and different safety states.
2. The motor controller of claim 1, wherein the fault detection module comprises:
the low-voltage and under-voltage detection module is used for detecting whether the low-voltage side of the motor controller is under-voltage or not;
the high-voltage bus under-voltage detection module is used for detecting whether a high-voltage bus of the motor controller is under-voltage or not;
the high-voltage bus overvoltage detection module is used for detecting whether the high-voltage bus is overvoltage or not;
the motor phase current overcurrent detection module is used for detecting whether the motor phase current of the driving motor is overcurrent or not;
and the IGBT driving fault detection module is used for detecting whether the IGBT driving module is in fault or not.
3. The motor controller according to claim 2, wherein the analog signal acquisition and processing module comprises:
each power supply output voltage detection module is used for detecting the output voltages of the power supply module and the backup power supply module;
the low-voltage battery voltage detection module is used for detecting the actual voltage of the power supply module;
the high-voltage bus voltage detection module is used for detecting the actual voltage of the high-voltage bus;
the high-voltage bus current detection module is used for detecting the actual current of the high-voltage bus;
the motor phase current detection module is used for detecting the motor phase current of the driving motor;
the motor winding temperature detection module is used for detecting the actual motor winding temperature of the driving motor;
the IGBT temperature detection module is used for detecting the actual temperature of the IGBT driving module;
and the cooling liquid temperature detection module is used for detecting the actual cooling liquid temperature of the driving motor.
4. The motor controller of claim 1, further comprising:
and the communication module is in CAN communication with the vehicle control unit.
5. The motor controller of claim 1, further comprising:
the first overvoltage protection module is arranged corresponding to the power supply module and used for disconnecting a first power supply circuit of the power supply module when the power supply module fails;
and the second overvoltage protection module is arranged corresponding to the backup power supply module and is used for disconnecting a second power supply circuit of the backup power supply module when the backup power supply module fails.
6. The motor controller of claim 5, further comprising:
a first overcurrent protection module of a first diode is arranged between the first overcurrent protection module and the first overvoltage protection module and is used for limiting the actual current of the first power supply circuit within a preset range;
and a second over-current protection module of a second diode is arranged between the second over-voltage protection module and the second over-current protection module, and is used for limiting the actual current of the second power supply circuit within the preset range.
7. The motor controller of claim 6 wherein the anode of the first diode is connected to the first overvoltage protection module, the cathode of the first diode is connected to the first overcurrent protection module, the anode of the second diode is connected to the second overvoltage protection module, and the cathode of the second diode is connected to the second overcurrent protection module.
8. The motor controller according to claim 6 or 7, further comprising:
one end of the DC/DC converter is connected with the first overcurrent protection module, and the other end of the DC/DC converter is connected with the CPLD device.
9. The motor controller of claim 1, further comprising:
and the active discharging module is connected with the CPLD device and is used for actively discharging according to a discharging instruction of the CPLD device.
10. A vehicle, characterized by comprising: the motor controller of the new energy vehicle according to any one of claims 1 to 9.
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| CN202111161038.3A CN113872316B (en) | 2021-09-30 | 2021-09-30 | New energy automobile's motor controller and vehicle |
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| CN202111161038.3A CN113872316B (en) | 2021-09-30 | 2021-09-30 | New energy automobile's motor controller and vehicle |
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| CN113872316B (en) | 2023-09-08 |
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