CN115503485A - Vehicle motor safety monitoring system and method - Google Patents

Vehicle motor safety monitoring system and method Download PDF

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Publication number
CN115503485A
CN115503485A CN202211320386.5A CN202211320386A CN115503485A CN 115503485 A CN115503485 A CN 115503485A CN 202211320386 A CN202211320386 A CN 202211320386A CN 115503485 A CN115503485 A CN 115503485A
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CN
China
Prior art keywords
monitoring module
motor
output
safety monitoring
module
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Pending
Application number
CN202211320386.5A
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Chinese (zh)
Inventor
王阳
刘传宝
蒋鹏
汪志刚
左杰文
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Chongqing Jinkang Power New Energy Co Ltd
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Chongqing Jinkang Power New Energy Co Ltd
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Priority to CN202211320386.5A priority Critical patent/CN115503485A/en
Publication of CN115503485A publication Critical patent/CN115503485A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • 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
    • H02M1/38—Means for preventing simultaneous conduction of switches
    • H02M1/385—Means for preventing simultaneous conduction of switches with means for correcting output voltage deviations introduced by the dead time
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines

Abstract

The application relates to a vehicle motor safety monitoring system and a vehicle motor safety monitoring method. The system comprises: the micro-control unit comprises a motor algorithm module, and a first input end of the motor algorithm module is connected with the controller local area network; the programmable logic device comprises a pulse monitoring module, and the input end of the pulse monitoring module is connected with the output end of the motor algorithm module; the driving module comprises an insulated gate bipolar transistor driver; the input end of the relay is respectively connected with the output end of the motor algorithm module and the input end of the pulse monitoring module, the output end of the relay is connected with the first input end driven by the insulated gate bipolar transistor, and the system can timely monitor the abnormal PWM output, so that the power loss of a vehicle is avoided.

Description

Vehicle motor safety monitoring system and method
Technical Field
The application relates to the technical field of vehicles, in particular to a vehicle motor safety monitoring system and method.
Background
The new energy automobile obtains power through a power motor, wherein a three-phase alternating current asynchronous motor and a three-phase permanent magnet synchronous motor are common power motors applied to the new energy automobile, and the principle is that high-voltage sine waves with a phase difference of 120 degrees are formed by an output Pulse Width Modulation (PWM) wave control Insulated Gate Bipolar Transistor (IGBT) module to drive the power motor to rotate, so that power is provided for the new energy automobile. However, when the PWM is abnormal, the power motor may not be able to provide power for the new energy vehicle, and even safety hazards may be caused, for example, the in-phase upper bridge arm and the in-phase lower bridge arm of the power motor are simultaneously conducted, so that the IGBT is destroyed.
Disclosure of Invention
Therefore, the vehicle motor safety monitoring system and method are provided, and the problem that in the prior art, the power of a vehicle is lost due to abnormal PWM output is solved.
In one aspect, a vehicle motor safety monitoring system is provided, the system comprising:
the micro-control unit comprises a motor algorithm module, wherein a first input end of the motor algorithm module is connected with the controller local area network and is used for receiving a vehicle-mounted whole vehicle control signal from the controller local area network and generating the whole vehicle control signal into a corresponding pulse wave;
the programmable logic device comprises a pulse monitoring module, the input end of the pulse monitoring module is connected with the output end of the motor algorithm module, the pulse monitoring module is used for receiving and monitoring the dead time of pulse waves sent by the motor algorithm module, and when the dead time is abnormal, a first abnormal signal is output;
the driving module comprises an insulated gate bipolar transistor drive, a signal feedback end of the insulated gate bipolar transistor drive is connected with a second input end of the motor algorithm module, and the insulated gate bipolar transistor drive is used for receiving pulse waves sent by the motor algorithm module to drive a vehicle motor to operate and feeding back a corresponding fault feedback signal;
the input end of the relay is respectively connected with the output end of the motor algorithm module and the input end of the pulse monitoring module, the output end of the relay is connected with the first input end driven by the insulated gate bipolar transistor, and when the relay receives the first abnormal signal output by the pulse monitoring module, the output end of the relay is disconnected with the first input end driven by the insulated gate bipolar transistor.
In one embodiment, the system further includes that the micro control unit further includes a first safety monitoring module, and an input terminal of the first safety monitoring module is connected to a signal feedback terminal driven by the igbt, and is configured to receive a fault feedback signal from the igbt, and output a corresponding second abnormal signal according to the fault feedback signal.
In one embodiment, the system further includes a second safety monitoring module, where an input terminal of the second safety monitoring module is connected to the signal feedback terminal driven by the igbt, and is configured to receive a fault feedback signal from the igbt, and output a corresponding third abnormal signal according to the fault feedback signal.
In one embodiment, the system further comprises a system monitoring module, an input end of the system monitoring module is connected with a signal feedback end of the first safety monitoring module, and the system monitoring module is used for receiving a fault feedback signal of the micro control unit and outputting a fourth abnormal signal according to the fault feedback signal.
In one embodiment, the system further includes a first and circuit, a first one-input terminal of the first and circuit is connected to the output terminal of the pulse monitoring module, and a first two-input terminal of the first and circuit is connected to the output terminal of the second safety monitoring module.
In one embodiment, the system further includes a second and circuit, a second input terminal of the second and circuit is connected to the output terminal of the first and circuit, and a second input terminal of the second and circuit is connected to the output terminal of the system monitoring module.
In one embodiment, the system further includes a third and circuit, a third input terminal of the third and circuit is connected to the output terminal of the first safety monitoring module, a third second input terminal of the third and circuit is connected to the output terminal of the second and circuit, and an output terminal of the third and circuit is connected to the second input terminal of the igbt driver.
In one embodiment, the system further comprises a relay which responds to a first abnormal signal from the pulse monitoring module, and/or a second abnormal signal from the first safety monitoring module, and/or a third abnormal signal from the second safety monitoring module, disconnects the input end of the insulated gate bipolar transistor drive, and connects the second input end of the insulated gate bipolar transistor drive and the output end of the third and circuit.
In another aspect, a vehicle motor safety monitoring method is provided, which is applied to any one of the above embodiments, and includes the following steps: a first input end of the motor algorithm module is accessed to a controller area network to acquire a vehicle control signal from the controller area network, wherein the vehicle control signal comprises motor torque information and motor speed information; the output end of the motor algorithm module is connected with the input end of the pulse monitoring module, and the motor algorithm module responds to the motor torque information and the motor speed information to generate corresponding pulse waves and transmits the pulse waves to the pulse monitoring module; the pulse monitoring module responds to the pulse wave and monitors the dead time of the pulse wave, when the dead time is within the range of a dead time threshold value, the pulse wave is abnormal, and the pulse monitoring module outputs a first abnormal signal; and the relay responds to the first abnormal signal, disconnects the connection with the first input end driven by the insulated gate bipolar transistor, and closes the connection of the relay with the second input end driven by the insulated gate bipolar transistor and the output end of the third and circuit.
In one embodiment, the method further comprises the following steps: the first safety monitoring module and the second safety monitoring module respectively acquire fault feedback signals driven by the insulated gate bipolar transistor and respond to the fault feedback signals to output corresponding second abnormal signals and third abnormal signals; and the relay responds to the second abnormal signal and the third abnormal signal, disconnects the connection with the first input end driven by the insulated gate bipolar transistor, and closes the connection between the relay and the second input end driven by the insulated gate bipolar transistor and the output end of the third and circuit.
The system comprises a micro control unit, wherein the micro control unit comprises a motor algorithm module, and a first input end of the motor algorithm module is connected with a controller local area network and is used for receiving a vehicle-mounted finished automobile control signal from the controller local area network and generating a corresponding pulse wave for the finished automobile control signal; the programmable logic device comprises a pulse monitoring module, wherein the input end of the pulse monitoring module is connected with the output end of the motor algorithm module, the pulse monitoring module is used for receiving and monitoring the dead time of a pulse wave sent by the motor algorithm module, and when the dead time is abnormal, a first abnormal signal is output; the driving module comprises an insulated gate bipolar transistor drive, a signal feedback end of the insulated gate bipolar transistor drive is connected with a second input end of the motor algorithm module, and the insulated gate bipolar transistor drive is used for receiving pulse waves sent by the motor algorithm module to drive the vehicle motor to operate and feeding back a corresponding fault feedback signal; the input end of the relay is connected with the output end of the motor algorithm module and the input end of the pulse monitoring module respectively, the output end of the relay is connected with the first input end driven by the insulated gate bipolar transistor, when the relay receives a first abnormal signal output by the pulse monitoring module, the output end of the relay is disconnected with the first input end driven by the insulated gate bipolar transistor, therefore, the pulse wave output by the motor algorithm module is monitored through the pulse monitoring module, the motor is controlled to run according to the monitored condition, and the problem that the vehicle loses power due to the fact that PWM output is abnormal is solved.
Drawings
FIG. 1 is a system block diagram of a vehicle motor safety monitoring system in one embodiment;
FIG. 2 is a system configuration diagram of a vehicle motor safety monitoring system in another embodiment;
FIG. 3 is a flowchart illustrating a method for monitoring vehicle motor safety in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
It should be noted that the drawings provided in the present embodiment are only for schematically illustrating the basic concept of the present disclosure, and the components related to the present disclosure are only shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of each component in actual implementation may be changed freely, and the component layout may be more complicated.
The structures, the proportions, the sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions that the present specification can implement, so that the present specification does not have the substantial technical meaning, and any modifications of the structures, changes of the proportion relationships, or adjustments of the sizes, can still fall within the range that the technical contents disclosed in the present specification can cover without affecting the efficacy and the achievable purpose of the present specification.
References in this specification to orientations or positional relationships such as "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," "circumferential," and the like are based on the orientations or positional relationships illustrated in the drawings and are intended to simplify the description, rather than to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the description. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
For ease of understanding, the following description will first present terms and concepts related to embodiments of the present application.
1. Dead zone
The dead zone is that after the upper half bridge is turned off, the lower half bridge is turned on after a certain time delay or the upper half bridge is turned on after the lower half bridge is turned off after a certain time delay, so that the power element is prevented from being burnt. This delay time is the dead zone. Dead time control (i.e., the components of the upper and lower half-bridges are both off) is not available in the PWM provided by conventional low-end singlechips.
2. Dead time
When the dead time is PWM output, a protection period is set for preventing the upper and lower tubes of the H bridge or the half H bridge from being simultaneously conducted due to the problem of switching speed, so that the upper and lower tubes cannot output at the time, waveform output is interrupted certainly, and the dead time generally only accounts for a period of a few percent. However, when the duty ratio of the PWM wave itself is small, the vacant part is larger than the dead zone, so the dead zone affects the output ripple, but should not play a decisive role.
3. H bridge
An H-bridge is a typical dc motor control circuit, which is known as an "H-bridge" because its circuit shape closely resembles the letter H.
The new energy automobile obtains power through a power motor, and the principle is that the position information and phase current information of a rotor are collected through a current motor control system, 6 paths of PWM control waveforms are output after calculation, and high-voltage sine waves with a phase difference of 120 degrees are formed by outputting PWM to control an IGBT module to drive the power motor to rotate, so that power is provided for the new energy automobile. However, when the PWM is abnormal, for example, when the in-phase upper arm and the lower arm are simultaneously turned on, the IGBT may be destroyed, and the vehicle may unexpectedly lose power. In the application, the vehicle motor safety monitoring system comprises a micro control unit and a safety monitoring unit, wherein the micro control unit comprises a motor algorithm module and a first safety monitoring module; the programmable logic device comprises a pulse monitoring module and a second safety monitoring module; the driving module comprises an insulated gate bipolar transistor driver; the input end of the motor algorithm module is connected with the input end of the first safety monitoring module, the input end of the second safety monitoring module and the signal feedback end driven by the insulated gate bipolar transistor, the output end of the motor algorithm module is connected with the input end of the pulse monitoring module and the first input end driven by the insulated gate bipolar transistor, dead time of PWM is monitored, and when the dead time is abnormal, the PWM is controlled, so that the problem that a vehicle loses power due to abnormal PWM output is solved.
In one embodiment, as shown in fig. 1, there is provided a vehicle motor safety monitoring system, the system comprising:
the micro control unit comprises a motor algorithm module, a first input end of the motor algorithm module is connected with the controller local area network and is used for receiving vehicle-mounted whole vehicle control signals from the controller local area network and generating corresponding pulse waves for the whole vehicle control signals;
the programmable logic device comprises a pulse monitoring module, wherein the input end of the pulse monitoring module is connected with the output end of the motor algorithm module, the pulse monitoring module is used for receiving and monitoring the dead time of a pulse wave sent by the motor algorithm module, and when the dead time is abnormal, a first abnormal signal is output;
the driving module comprises an insulated gate bipolar transistor drive, a signal feedback end of the insulated gate bipolar transistor drive is connected with a second input end of the motor algorithm module, and the insulated gate bipolar transistor drive is used for receiving pulse waves sent by the motor algorithm module to drive the vehicle motor to operate and feeding back a corresponding fault feedback signal;
the input end of the relay is respectively connected with the output end of the motor algorithm module and the input end of the pulse monitoring module, the output end of the relay is connected with the first input end driven by the insulated gate bipolar transistor, and when the relay receives a first abnormal signal output by the pulse monitoring module, the connection between the output end of the relay and the first input end driven by the insulated gate bipolar transistor is disconnected.
It should be noted that, as shown in fig. 2, the CPLD has a high response speed, so the pulse monitoring module can be disposed on the CPLD, and the Micro Control Unit (MCU) is a functional safety type dual core step-locking single chip microcomputer, and runs a motor algorithm and a safety monitoring program inside, and the pulse monitoring module is used for monitoring the dead time of the pulse wave output by the motor algorithm module. The control signal of the whole vehicle, namely a Controller Area Network (CAN) signal is sent to a motor algorithm module of the MCU, the motor algorithm module analyzes a torque and a speed instruction sent by the CAN and sends a PWM waveform with a dead zone for controlling a motor, when the dead zone time is abnormal, the pulse monitoring module outputs a first abnormal signal, if 0, the abnormal signal indicates that the motor of the vehicle motor safety monitoring system is abnormal, so that the connection between the relay and the first input end of the IGBT is cut off rapidly, and the safety of the motor is protected.
As a specific implementation manner of the foregoing embodiment, the micro control unit further includes a first safety monitoring module, where an input end of the first safety monitoring module is connected to a signal feedback end driven by the igbt, and is configured to receive a fault feedback signal from the igbt, and output a corresponding second abnormal signal according to the fault feedback signal.
It should be noted that, the first safety monitoring module monitors the IGBT, and when the IGBT outputs the fault feedback signal, the first safety monitoring module correspondingly outputs a second abnormal signal, for example, "0", to monitor the IGBT.
As a specific implementation manner of the foregoing embodiment, the programmable logic device further includes a second safety monitoring module, where an input end of the second safety monitoring module is connected to a signal feedback end driven by the insulated gate bipolar transistor, and is configured to receive a fault feedback signal driven by the insulated gate bipolar transistor, and output a corresponding third abnormal signal according to the fault feedback signal.
It should be noted that, because the first safety monitoring module of the MCU has a probability of failure in monitoring the IGBT, a second safety monitoring module is added to the CPLD, and the second monitoring module monitors the IGBT, and when the IGBT outputs a fault feedback signal, the second safety monitoring module correspondingly outputs a third abnormal signal, such as "0", to implement redundant monitoring of the IGBT, thereby expanding the monitoring range and further meeting the functional safety requirements.
As a specific implementation manner of the foregoing embodiment, the system further includes a system monitoring module, an input end of the system monitoring module is connected to the signal feedback end of the first safety monitoring module, and the system monitoring module is configured to receive a fault feedback signal of the micro control unit and output a fourth abnormal signal according to the fault feedback signal.
It should be noted that, as shown in fig. 2, the system monitoring module refers to a vehicle electronic induction brake Control (SBC) level monitoring power supply module: and the MCU and the CPLD are powered, the completeness of the power supply is monitored, an MCU error signal and a dog feeding signal are received, and a function safety enabling signal is output.
As a specific implementation manner of the foregoing embodiment, the system further includes a first and circuit, a first one-to-one input end of the first and circuit is connected to the output end of the pulse monitoring module, and a first two-to-one input end of the first and circuit is connected to the output end of the second safety monitoring module.
It should be noted that, this application can realize the control to PWM and the control of IGBT simultaneously, realize through first and the circuit, when the IGBT breaks down, second safety monitoring module obtains corresponding feedback signal "0", because the output of second safety monitoring module is connected with first two input ends of first and the circuit, consequently, the output of first and the circuit is "0", or, when the dead time appears unusually, pulse monitoring module output "0" signal, because the output of pulse monitoring module is connected with the first one-to-one input end of first and the circuit, consequently the output of first and the circuit is "0", only when IGBT and motor algorithm module output are all normal promptly, first and the circuit just can normally output, thereby the probability that the control is makeed mistakes has been reduced.
As a specific implementation manner of the foregoing embodiment, the system further includes a second and circuit, a second input terminal of the second and circuit is connected to the output terminal of the first and circuit, and a second input terminal of the second and circuit is connected to the output terminal of the system monitoring module.
As a specific implementation manner of the foregoing embodiment, the third and circuit has a third first input terminal connected to the output terminal of the first safety monitoring module, a third second input terminal connected to the output terminal of the second and circuit, and an output terminal connected to the second input terminal of the igbt driver.
It should be noted that, as shown in fig. 2, the third and circuit generates a safety state enable signal by receiving signals output by the first safety monitoring module, the second safety monitoring module and the pulse monitoring module, so as to protect the safety of the IGBT driving, thereby ensuring the safety of the vehicle motor.
It will be appreciated by those skilled in the art that the configuration shown in fig. 1 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, as shown in fig. 3, there is provided a vehicle motor safety monitoring method applied to any one of the above embodiments, including:
step 301, a first input end of a motor algorithm module is accessed to a controller local area network to obtain a finished automobile control signal from the controller local area network, wherein the finished automobile control signal comprises motor torque information and motor speed information;
step 302, the output end of a motor algorithm module is connected with the input end of a pulse monitoring module, the motor algorithm module responds to motor torque information and motor speed information to generate corresponding pulse waves, and the pulse waves are transmitted to the pulse monitoring module;
303, responding to the pulse wave and monitoring the dead time of the pulse wave by the pulse monitoring module, wherein when the dead time is in the range of the dead time threshold value, the pulse wave is abnormal, and the pulse monitoring module outputs a first abnormal signal;
and 304, the relay responds to the first abnormal signal, the connection with the first input end driven by the insulated gate bipolar transistor is disconnected, and the connection between the relay and the second input end driven by the insulated gate bipolar transistor and the connection between the relay and the output end of the third and circuit are closed.
As a specific implementation manner of the foregoing embodiment, the method further includes: the first safety monitoring module and the second safety monitoring module respectively acquire fault feedback signals driven by the insulated gate bipolar transistor and respond to the fault feedback signals to output corresponding second abnormal signals and third abnormal signals; and the relay responds to the second abnormal signal and the third abnormal signal, disconnects the connection with the first input end driven by the insulated gate bipolar transistor, and closes the connection between the relay and the second input end driven by the insulated gate bipolar transistor and the connection between the relay and the third input end driven by the insulated gate bipolar transistor and the output end of the circuit.
It should be understood that, although the steps in the flowchart of fig. 3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A vehicle motor safety monitoring system, comprising:
the micro-control unit comprises a motor algorithm module, wherein a first input end of the motor algorithm module is connected with the controller local area network and is used for receiving a vehicle-mounted whole vehicle control signal from the controller local area network and generating the whole vehicle control signal into a corresponding pulse wave;
the programmable logic device comprises a pulse monitoring module, the input end of the pulse monitoring module is connected with the output end of the motor algorithm module, the pulse monitoring module is used for receiving and monitoring the dead time of pulse waves sent by the motor algorithm module, and when the dead time is abnormal, a first abnormal signal is output;
the driving module comprises an insulated gate bipolar transistor drive, a signal feedback end of the insulated gate bipolar transistor drive is connected with the second input end of the motor algorithm module, and the insulated gate bipolar transistor drive is used for receiving pulse waves sent by the motor algorithm module to drive a vehicle motor to operate and feeding back a corresponding fault feedback signal;
the input end of the relay is respectively connected with the output end of the motor algorithm module and the input end of the pulse monitoring module, the output end of the relay is connected with the first input end driven by the insulated gate bipolar transistor, and when the relay receives the first abnormal signal output by the pulse monitoring module, the output end of the relay is disconnected with the first input end driven by the insulated gate bipolar transistor.
2. The vehicle motor safety monitoring system according to claim 1, wherein the micro control unit further comprises a first safety monitoring module, an input terminal of the first safety monitoring module is connected with the signal feedback terminal of the igbt drive, and is configured to receive a fault feedback signal from the igbt drive and output a corresponding second abnormal signal according to the fault feedback signal.
3. The vehicle motor safety monitoring system according to claim 2, wherein the programmable logic device further comprises a second safety monitoring module, an input terminal of the second safety monitoring module is connected with the signal feedback terminal of the igbt driver, and is configured to receive a fault feedback signal from the igbt driver and output a corresponding third abnormal signal according to the fault feedback signal.
4. The vehicle motor safety monitoring system according to claim 3, further comprising a system monitoring module, wherein an input end of the system monitoring module is connected to the signal feedback end of the first safety monitoring module, and the system monitoring module is configured to receive a fault feedback signal of the micro control unit and output a fourth abnormal signal according to the fault feedback signal.
5. The vehicle motor safety monitoring system of claim 4, further comprising a first AND circuit, a first one of the inputs of the first AND circuit being connected to the output of the pulse monitoring module, and a first two of the inputs of the first AND circuit being connected to the output of the second safety monitoring module.
6. The vehicle motor safety monitoring system of claim 5, further comprising a second AND circuit having a second input connected to the output of the first AND circuit and a second input connected to the output of the system monitoring module.
7. The vehicle motor safety monitoring system of claim 6, further comprising a third and circuit, a third input of the third and circuit being connected to the output of the first safety monitoring module, a third second input of the third and circuit being connected to the output of the second and circuit, and an output of the third and circuit being connected to the second input of the IGBT drive.
8. The vehicle motor safety monitoring system of claim 7, further comprising the relay responsive to a first exception signal from the pulse monitoring module, and/or a second exception signal from the first safety monitoring module, and/or a third exception signal from the second safety monitoring module, to disconnect the input of the IGBT drive and connect the second input of the IGBT drive, the third input and an output of a circuit.
9. A vehicle motor safety monitoring method applied to the vehicle motor safety monitoring system according to any one of claims 1 to 8, comprising:
a first input end of the motor algorithm module is accessed to a controller area network to acquire a vehicle control signal from the controller area network, wherein the vehicle control signal comprises motor torque information and motor speed information;
the output end of the motor algorithm module is connected with the input end of the pulse monitoring module, and the motor algorithm module responds to the motor torque information and the motor speed information to generate corresponding pulse waves and transmits the pulse waves to the pulse monitoring module;
the pulse monitoring module responds to the pulse wave and monitors the dead time of the pulse wave, when the dead time is within the range of a dead time threshold value, the pulse wave is abnormal, and the pulse monitoring module outputs a first abnormal signal;
and the relay responds to the first abnormal signal, disconnects the first input end driven by the insulated gate bipolar transistor, and closes the connection of the relay, the second input end driven by the insulated gate bipolar transistor and the output end of the third and circuit.
10. The vehicle motor safety monitoring method of claim 9, further comprising:
the first safety monitoring module and the second safety monitoring module respectively acquire fault feedback signals driven by the insulated gate bipolar transistor and respond to the fault feedback signals to output corresponding second abnormal signals and third abnormal signals;
and the relay responds to the second abnormal signal and the third abnormal signal, disconnects the first input end driven by the insulated gate bipolar transistor, and closes the connection of the relay, the second input end driven by the insulated gate bipolar transistor and the output end of the third and circuit.
CN202211320386.5A 2022-10-26 2022-10-26 Vehicle motor safety monitoring system and method Pending CN115503485A (en)

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CN202923416U (en) * 2012-11-05 2013-05-08 中国北车股份有限公司大连电力牵引研发中心 Traction control unit for electric locomotive
CN107745743A (en) * 2017-09-30 2018-03-02 成都雅骏新能源汽车科技股份有限公司 A kind of Electric Power Steering Control System based on functional safety
CN107800277A (en) * 2016-08-28 2018-03-13 上海奇电电气科技股份有限公司 The frequency converter and control method of minimum pulse width limitation are realized in CPLD controls
CN209356888U (en) * 2019-02-18 2019-09-06 上海鑫国动力科技有限公司 A kind of electric machine controller circuit module based on CPLD
CN113067529A (en) * 2019-12-31 2021-07-02 比亚迪股份有限公司 Motor control system and vehicle with same
DE102021206853B3 (en) * 2021-06-30 2022-02-10 Vitesco Technologies GmbH Driver circuit with two cascaded half-bridge drivers for controlling three transistors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202923416U (en) * 2012-11-05 2013-05-08 中国北车股份有限公司大连电力牵引研发中心 Traction control unit for electric locomotive
CN107800277A (en) * 2016-08-28 2018-03-13 上海奇电电气科技股份有限公司 The frequency converter and control method of minimum pulse width limitation are realized in CPLD controls
CN107745743A (en) * 2017-09-30 2018-03-02 成都雅骏新能源汽车科技股份有限公司 A kind of Electric Power Steering Control System based on functional safety
CN209356888U (en) * 2019-02-18 2019-09-06 上海鑫国动力科技有限公司 A kind of electric machine controller circuit module based on CPLD
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