WO2019001329A1

WO2019001329A1 - Fault detection and processing method and apparatus for electric vehicle inverter, and storage medium

Info

Publication number: WO2019001329A1
Application number: PCT/CN2018/092128
Authority: WO
Inventors: 谢启河; 洪文成
Original assignee: 蔚来汽车有限公司
Priority date: 2017-06-26
Filing date: 2018-06-21
Publication date: 2019-01-03
Also published as: CN109143109A

Abstract

A fault detection and processing method and apparatus for an electric vehicle inverter, and a computer readable storage medium. The method comprises: when an electric vehicle is in a travelling state, acquiring in real time a signal from at least one sensor located on each leg of a three-phase inverter, so as to obtain at least one inverter travelling state parameter (A1); based on the at least one inverter travelling state parameter, determining whether a fault has occurred in the three-phase inverter and a fault level thereof (A2); and if it is determined a fault has occurred in the three-phase inverter, performing a predetermined fault processing operation according to the determined fault level (A3). The fault detection and processing method and apparatus for an electric vehicle inverter, and the computer readable storage medium enable accurate detection of a fault and localization of a fault source.

Description

Electric vehicle inverter fault detection and processing method, device and storage medium

Technical field

The present invention relates to a fault detection and processing method, apparatus and storage medium, and more particularly to an electric vehicle inverter fault detection and processing method, apparatus and storage medium.

Background technique

At present, with the increasing development and popularity of electric vehicles, it is becoming more and more important to perform fault detection and processing of an inverter in an electric vehicle, which is a power conversion unit between an electric power source of an electric vehicle and a motor.

In the prior art solution, fault detection and processing of an inverter in an electric vehicle is typically implemented by determining whether a fault occurs by detecting whether an open circuit phenomenon and/or a short circuit phenomenon occurs in the inverter circuit, A predetermined fault handling operation is then carried out.

However, the above-mentioned prior art solution has the following problem: since it is only possible to confirm the occurrence of a failure based on whether or not an apparent indication such as an open circuit phenomenon and/or a short circuit phenomenon occurs, it is difficult to accurately detect the failure, and it is not possible to effectively and effectively Locate the source of the fault.

Therefore, there is a need to provide an electric vehicle inverter failure detecting and processing method, apparatus, and storage medium capable of accurately detecting a fault and locating a fault source.

Summary of the invention

In order to solve the problems or other problems of the above prior art solutions, the present invention provides the following technical solutions.

According to a first aspect of the present invention, a method for detecting and processing a fault of an electric vehicle inverter is provided, including:

(A1) acquiring, when the electric vehicle is in a running state, signals from at least one sensor located on each of the bridge arms of the three-phase inverter in real time to acquire at least one inverter driving state parameter;

(A2) determining, based on the at least one inverter driving state parameter, whether the three-phase inverter is faulty and its fault level;

(A3) If it is determined that the three-phase inverter has failed, a predetermined fault handling operation is performed in accordance with the determined failure level.

According to a second aspect of the present invention, an electric vehicle inverter failure detecting and processing apparatus is provided, the electric vehicle inverter failure detecting and processing apparatus comprising a running state fault detecting unit, wherein the traveling state fault detecting unit is configured To acquire signals from at least one sensor located on each of the bridge arms of the three-phase inverter in real time to acquire at least one inverter travel state parameter, based on the at least one, when the electric vehicle is in a running state The inverter running state parameter determines whether the three-phase inverter has failed and its fault level, and if it is determined that the three-phase inverter has failed, performs a predetermined fault handling operation according to the determined fault level.

According to a third aspect of the invention there is provided a storage medium for storing computer readable instructions executable by one or more processors to implement the aforementioned electric vehicle inverter fault detection And processing methods.

The method, device and storage medium for fault detection and processing of an electric vehicle inverter disclosed by the present invention may have the following advantages: since each phase circuit (ie, each bridge arm) of the three-phase inverter includes a temperature The sensor is able to detect faults more accurately and locate directly to the source of the fault.

DRAWINGS

The technical features and advantages of the present invention will be better understood by those skilled in the art, in which:

1 is a flow chart of a method for detecting and processing an electric vehicle inverter fault according to an embodiment of the present invention;

2 is a schematic structural diagram of an electric vehicle inverter failure detecting and processing apparatus according to an embodiment of the present invention.

Detailed ways

The present invention is described below with reference to flowchart illustrations, block diagrams, and/or flowcharts of methods and apparatus in accordance with embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of flowchart illustrations and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing device to form a machine such that the instructions executed by a processor of a computer or other programmable data processing device are created for implementing the processes Parts and/or blocks and/or components of the functions/operations specified in one or more of the block diagrams.

The computer program instructions may be stored in a computer readable memory, which may instruct a computer or other programmable processor to perform functions in a particular manner such that the instructions stored in the computer readable memory comprise an implementation flow diagram and/or The production of the instruction part of the function/operation specified in one or more boxes of the block diagram.

These computer program instructions can be loaded onto a computer or other programmable data processor to cause a series of operational steps to be executed on a computer or other programmable processor to constitute a computer-implemented process for the computer or other programmable data. The instructions executed on the processor provide steps for implementing the functions or operations specified in one or more of the blocks of the flowchart and/or block diagram. It should also be noted that in some alternative implementations, the functions/operations shown in the blocks may occur out of the order shown in the flowchart. For example, two blocks shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order, depending upon the function/operation involved.

1 is a flow chart showing a method of fault detection and processing of an electric vehicle inverter in accordance with an embodiment of the present invention. As shown in FIG. 1 , the method for detecting and processing faults of an electric vehicle inverter disclosed by the present invention includes: (A1) collecting each bridge arm from a three-phase inverter in real time when the electric vehicle is in a running state. a signal of the at least one sensor to obtain at least one inverter driving state parameter; (A2) determining, based on the at least one inverter driving state parameter, whether the three-phase inverter is faulty and its fault level; (A3) If it is determined that the three-phase inverter has failed, a predetermined fault handling operation is performed according to the determined fault level.

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present disclosure, the at least one inverter driving state parameter includes each phase circuit of the three-phase inverter. The current value and voltage value, the inverter chip operating voltage value, and the temperature value of a power transistor (such as an IGBT (Insulated Gate Bipolar Transistor)) in the inverter.

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present disclosure, the step (A2) further includes: if any one of the at least one inverter driving state parameter If it exceeds its corresponding predetermined threshold, it is determined that the three-phase inverter has failed.

Illustratively, in an embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present invention, the step (A2) further comprises: if the temperature value of the power transistor in the inverter exceeds the first temperature The threshold (eg, 90 ° C) determines that the fault level is a first level fault, and if the temperature value of the power transistor in the inverter exceeds a second temperature threshold (eg, 120 ° C), then the fault level is determined to be a second level fault.

Illustratively, in an embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present disclosure, the step (A2) further includes: if the first level fault occurs, lowering the three phase The output power of the inverter, and if the second-level fault occurs, the power output of the three-phase inverter is stopped (ie, the inverter stops operating).

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present invention, the step (A2) further includes: when determining that due to the power transistor in the three-phase inverter When the temperature value exceeds a predetermined threshold and a fault occurs, the value of the first counter is increased every predetermined time (for example, 10 ms) until the value of the first counter exceeds the first counter threshold, and the output of the three-phase inverter is stopped. Power and alarm, and then when it is determined that a failure has occurred due to the temperature value of the power transistor in the three-phase inverter exceeding a predetermined threshold, the value of the first counter is decreased every predetermined time (for example, 10 ms) The normal power output of the three-phase inverter is restored (ie, the normal operation of the inverter is resumed) until the value of the first counter is equal to zero. Thus, the fault due to the temperature value of the power transistor exceeding a predetermined threshold is recoverable.

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present invention, the step (A2) further includes: when determining that any one of the three-phase inverters is When a current value or a voltage value of the circuit or an inverter chip operating voltage value exceeds a predetermined threshold to cause a failure, the value of the second counter is increased every predetermined time (for example, 10 ms) until the value of the second counter exceeds the second value. Stopping the output power of the three-phase inverter and alarming the counter threshold, and then determining that there is no current value or voltage value or inverter chip operating voltage due to any one of the three-phase inverters When the value exceeds a predetermined threshold and a failure occurs, the value of the second counter is decreased every predetermined time (for example, 10 ms) until the value of the second counter is equal to 0, and the power of the three-phase inverter is not restored. Output (ie, in this case, once the inverter fails, it cannot be recovered). Thus, a fault due to a current value or a voltage value of any one of the three-phase inverters or an inverter chip operating voltage value exceeding a predetermined threshold is unrecoverable.

Illustratively, in an embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present invention, the step (A2) further comprises: determining the three by detecting a communication state of the inverter chip. Whether the phase inverter has failed.

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present invention, the method further includes: separately setting three temperature detecting devices to independently detect the three-phase inverter The temperature value of the power transistor in each phase of the circuit, and each temperature sensing device comprises two physically separate temperature sensors (therefore the two physically separated temperature sensors can be redundantly backed up each other so that When one temperature sensor fails, the other temperature sensor can still be used normally).

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present disclosure, the step (A2) further includes: based on detecting the power transistor in the three-phase inverter The temperature value calculates the current heat accumulation amount of the power transistor, and stops the power output of the three-phase inverter when the calculated heat accumulation amount exceeds a predetermined threshold (thus protecting the power transistor from being damaged due to excessive temperature) .

Illustratively, in one embodiment of the disclosed method for detecting and processing an electric vehicle inverter fault, the method further includes: collecting the electric vehicle from the at least one onboard sensor when the electric vehicle is started by powering up Signaling to acquire at least one activation parameter, and subsequently detecting whether a three-phase inverter in the electric vehicle has failed based on the at least one activation parameter, and if it is determined that the three-phase inverter has failed, implementing a predetermined Fault handling operation.

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present disclosure, the at least one starting parameter includes a current value of each of the three-phase inverters and The voltage value and the temperature value of a power transistor (for example, an IGBT (Insulated Gate Bipolar Transistor)) in the three-phase inverter.

Illustratively, in one embodiment of the method for detecting and processing an electric vehicle inverter fault according to the present disclosure, the method further includes: for each phase of the three-phase inverter based on a reference voltage value The current and voltage values are normalized to map them to the range [0, 4096].

Illustratively, in one embodiment of the disclosed method of electrical vehicle inverter fault detection and processing, the method further includes: if the current value and voltage of each of the three phase inverters Any of the values is in the range [2007, 2089], then it is determined that the three-phase inverter has not failed, otherwise it is determined that the three-phase inverter has failed.

Illustratively, in one embodiment of the method of electrical vehicle inverter fault detection and processing disclosed herein, the method further includes if a temperature value of the power transistor in the three-phase inverter (typically at Between -50 ° C and 250 ° C) Within a predetermined range (eg, near 100 ° C), it is determined that the three-phase inverter has not failed, otherwise it is determined that the three-phase inverter has failed.

Illustratively, in one embodiment of the disclosed method of electrical vehicle inverter fault detection and processing, the reference voltage value is obtained by actually detecting the calibration (eg, by periodically detecting a predetermined number of times) The actual voltage reference value is calculated and its average value is calculated to obtain the reference voltage value).

It can be seen from the above that the electric vehicle inverter fault detection and processing method disclosed by the present invention has at least the following advantages: since each phase circuit (ie, each bridge arm) of the three-phase inverter includes a temperature sensor Therefore, it is possible to detect the fault more accurately and directly locate it to the source of the fault.

2 is a schematic block diagram of an electric vehicle inverter failure detecting and processing apparatus according to an embodiment of the present invention. As shown in FIG. 2, the electric vehicle inverter failure detecting and processing apparatus disclosed by the present invention includes a running state fault detecting unit 1 and an activated state fault detecting unit 2. The driving state failure detecting unit 1 is configured to acquire signals from at least one sensor located on each of the bridge arms of the three-phase inverter in real time to acquire at least one inverter when the electric vehicle is in a running state a state parameter, and determining, based on the at least one inverter driving state parameter, whether the three-phase inverter has failed and its fault level, and if it is determined that the three-phase inverter fails, according to the determined The fault level implements a predetermined fault handling operation. The startup state failure detecting unit 2 is configured to acquire a signal from at least one onboard sensor to acquire at least one startup parameter when the electric vehicle is started by powering up, and then detect the based on the at least one activation parameter Whether the three-phase inverter in the electric vehicle fails, and if it is determined that the three-phase inverter has failed, a predetermined failure processing operation is performed.

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the at least one inverter travel state parameter includes each of the three phase inverters The current value and voltage value, the inverter chip operating voltage value, and the temperature value of a power transistor (such as an IGBT (Insulated Gate Bipolar Transistor)) in the inverter.

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus, the travel state fault detecting unit 1 is further configured to: if the at least one inverter travel state parameter If any one of them exceeds its corresponding predetermined threshold, it is determined that the three-phase inverter has failed.

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus, the travel state fault detecting unit 1 is further configured to: if the temperature value of the power transistor in the inverter If the first temperature threshold (eg, 90 ° C) is exceeded, the fault level is determined to be a first level fault, and if the temperature value of the power transistor in the inverter exceeds a second temperature threshold (eg, 120 ° C), the fault level is determined to be the second Level failure.

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the travel state fault detecting unit 1 is further configured to: if the first level fault occurs, decrease The output power of the three-phase inverter, and if the second-level fault occurs, stopping the power output of the three-phase inverter (ie, the inverter stops operating).

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the travel state fault detecting unit 1 is further configured to: when determined to be due to the three-phase inverter When the temperature value of the power transistor exceeds a predetermined threshold and a fault occurs, the value of the first counter is increased every predetermined time (for example, 10 ms) until the value of the first counter exceeds the first counter threshold to stop the three-phase inverse The output power of the transformer is alarmed, and then when it is determined that a failure has occurred due to the temperature value of the power transistor in the three-phase inverter exceeding a predetermined threshold, the first time is decreased every predetermined time (for example, 10 ms) The value of a counter, until the value of the first counter is equal to 0, restores the normal power output of the three-phase inverter (ie, restores normal operation of the inverter). Thus, the fault due to the temperature value of the power transistor exceeding a predetermined threshold is recoverable.

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the travel state fault detecting unit 1 is further configured to: when determined to be due to the three-phase inverter When the current value or voltage value of any phase circuit or the inverter chip operating voltage value exceeds a predetermined threshold to cause a failure, the value of the second counter is increased every predetermined time (for example, 10 ms) until the second counter is Stopping the output power of the three-phase inverter and alarming when the value exceeds the second counter threshold, and then when determining that there is no current value or voltage value or inverter due to any of the three-phase inverters When the chip operating voltage value exceeds a predetermined threshold and a failure occurs, the value of the second counter is decreased every predetermined time (for example, 10 ms) until the value of the second counter is equal to 0, and the three-phase inverse is not restored. The power output of the transformer (ie, in this case, once the inverter fails, it cannot be recovered). Thus, a fault due to a current value or a voltage value of any one of the three-phase inverters or an inverter chip operating voltage value exceeding a predetermined threshold is unrecoverable.

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the travel state fault detecting unit 1 is further configured to assist by detecting a communication state of the inverter chip It is determined whether the three-phase inverter has failed.

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus, the travel state fault detecting unit 1 is further configured to independently detect each of the three-way temperature detecting devices The temperature value of the power transistor in each phase circuit of the three-phase inverter, wherein each temperature detecting device comprises two physically separated temperature sensors (so that the two physically separated temperature sensors can be redundant Backup, so that when one of the temperature sensors fails, the other temperature sensor can still be used normally).

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus, the travel state fault detecting unit 1 is further configured to: based on the detected three-phase inverter The temperature value of the power transistor in the calculation calculates the current heat accumulation amount of the power transistor, and stops the power output of the three-phase inverter when the calculated heat accumulation amount exceeds a predetermined threshold (thus protecting the power transistor from the temperature High and damaged).

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the at least one starting parameter includes a current value of each of the three phase inverters and The voltage value and the temperature value of a power transistor (for example, an IGBT (Insulated Gate Bipolar Transistor)) in the three-phase inverter.

Illustratively, in one embodiment of the electric vehicle inverter fault detection and processing apparatus disclosed herein, the startup state fault detecting unit 2 is further configured to: invert the three-phase based on a reference voltage value The current and voltage values of each phase circuit in the device are normalized to map it to the range [0, 4096].

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus, the startup state fault detecting unit 2 is further configured to: if each of the three phase inverters If any of the current value and the voltage value of the one-phase circuit is within the range [2007, 2089], it is determined that the three-phase inverter has not failed, otherwise it is determined that the three-phase inverter has failed.

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus, the startup state fault detection unit 2 is further configured to: if the power in the three-phase inverter The temperature value of the transistor (typically between -50 ° C and 250 ° C) is within a predetermined range (eg, near 100 ° C), then it is determined that the three-phase inverter has not failed, otherwise the three-phase inverse is determined The transformer has failed.

Illustratively, in one embodiment of the disclosed electric vehicle inverter fault detection and processing apparatus of the present invention, the reference voltage value is obtained by actually detecting the calibration (eg, by periodically detecting a predetermined number of times) The actual voltage reference value is calculated and its average value is calculated to obtain the reference voltage value).

It can be seen from the above that the electric vehicle inverter fault detection and processing device disclosed by the present invention has at least the following advantages: since each phase circuit (ie, each bridge arm) of the three-phase inverter includes a temperature sensor Therefore, it is possible to detect the fault more accurately and directly locate it to the source of the fault.

Moreover, the present invention also discloses a storage medium for storing computer readable instructions executable by one or more processors to implement an electric vehicle inverter fault detection and processing method as previously described.

The present invention also provides a controller including a memory and a processor, the memory storing program instructions capable of implementing any of the electric vehicle inverter fault detection and processing as described above when executed by the processor method. It should be understood that the instructions stored in the memory correspond to the steps of a specific example of an electric vehicle inverter fault detection and processing method that it can implement when executed by the processor. In the case where the execution step is controllable during execution of the instruction, the instruction may also be an instruction that enables the processor to implement various examples of the electric vehicle inverter failure detection and processing method as described above when executing the instruction.

It should also be noted that in some alternative implementations, the functions/operations shown in the blocks may occur out of the order shown in the flowchart. For example, two blocks shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order, depending upon the function/operation involved.

It should be noted that the elements disclosed and described herein (including the flowcharts and block diagrams in the drawings) are intended to refer to the logical boundaries between the elements. However, the components depicted and their functions may be executed on a machine by a computer executable medium having a processor capable of executing program instructions stored thereon, as a single, in accordance with software or hardware engineering practice. The fragment software structure, as an independent software module or as a module using external programs, code, services, etc., or any combination of these, and all such implementations are within the scope of the present disclosure.

Although a particular order of steps is shown, disclosed, and claimed, it is understood that the steps can be carried out, separated or combined in any order, unless otherwise indicated, and will still benefit from the disclosure.

Although the invention has been described in terms of the preferred embodiments described above, the implementation forms are not limited to the embodiments described above. It will be appreciated that various changes and modifications can be made in the present invention without departing from the spirit and scope of the invention.

Claims

An electric vehicle inverter fault detection and processing method, comprising:

(A1) acquiring, when the electric vehicle is in a running state, signals from at least one sensor located on each of the bridge arms of the three-phase inverter in real time to acquire at least one inverter driving state parameter;

(A2) determining, based on the at least one inverter driving state parameter, whether the three-phase inverter is faulty and its fault level;

(A3) If it is determined that the three-phase inverter has failed, a predetermined fault handling operation is performed in accordance with the determined failure level.
The electric vehicle inverter fault detection and processing method according to claim 1, wherein the at least one inverter driving state parameter comprises a current value of each phase circuit of the three-phase inverter. The voltage value, the inverter chip operating voltage value, and the temperature value of the power transistor in the inverter.
The electric vehicle inverter fault detection and processing method according to claim 2, wherein the step (A2) further comprises: if any one of the at least one inverter driving state parameters exceeds its corresponding A predetermined threshold determines that the three-phase inverter has failed.
The electric vehicle inverter fault detection and processing method according to claim 1, wherein the step (A2) further comprises: determining if a temperature value of the power transistor in the inverter exceeds a first temperature threshold The fault level is a first level fault, and if the temperature value of the power transistor in the inverter exceeds the second temperature threshold, it is determined that the fault level is a second level fault.
The electric vehicle inverter fault detection and processing method according to claim 4, wherein the step (A2) further comprises: if the first level fault occurs, reducing the three-phase inverter The power is output, and if the second level of fault occurs, the power output of the three-phase inverter is stopped.
The electric vehicle inverter fault detection and processing method according to claim 1, wherein the step (A2) further comprises: when determining that a temperature value of the power transistor in the three-phase inverter exceeds a predetermined value When a failure occurs, the value of the first counter is increased every predetermined time until the value of the first counter exceeds the first counter threshold, the output power of the three-phase inverter is stopped and an alarm is issued, and then when determined When there is no failure due to the temperature value of the power transistor in the three-phase inverter exceeding a predetermined threshold, the value of the first counter is decreased every predetermined time until the value of the first counter is equal to 0 The normal power output of the three-phase inverter is restored.
The electric vehicle inverter fault detection and processing method according to claim 6, wherein the step (A2) further comprises: determining a current value due to any one of the three-phase inverters And when the voltage value or the inverter chip operating voltage value exceeds a predetermined threshold to cause a fault, increasing the value of the second counter every predetermined time until the value of the second counter exceeds the second counter threshold, stopping the three-phase The output power of the inverter is alarmed, and then it is determined that there has been no failure due to the current value or voltage value of any one of the three-phase inverters or the inverter chip operating voltage value exceeding a predetermined threshold. At a time, the value of the second counter is decreased every predetermined time until the value of the second counter is equal to 0, and the power output of the three-phase inverter is not restored.
The electric vehicle inverter fault detection and processing method according to claim 1, wherein the step (A2) further comprises: determining the three-phase inverter by detecting a communication state of the inverter chip. Whether a failure has occurred.
The electric vehicle inverter fault detection and processing method according to claim 2, wherein the method further comprises: separately setting three temperature detecting means to independently detect each phase of the three-phase inverter The temperature value of the power transistor in the circuit, and each temperature sensing device contains two physically separate temperature sensors.
The electric vehicle inverter fault detection and processing method according to claim 9, wherein the step (A2) further comprises: calculating based on the detected temperature values of the power transistors in the three-phase inverter The current amount of heat accumulation of the power transistor, and stopping the power output of the three-phase inverter when the calculated amount of heat accumulation exceeds a predetermined threshold.
The electric vehicle inverter fault detection and processing method according to claim 1, wherein the method further comprises: when the electric vehicle is started by powering up, collecting signals from the at least one onboard sensor to obtain at least a startup parameter, and then detecting whether a three-phase inverter in the electric vehicle has failed based on the at least one startup parameter, and if it is determined that the three-phase inverter has failed, performing a predetermined failure processing operation .
The electric vehicle inverter fault detection and processing method according to claim 11, wherein the at least one starting parameter comprises a current value and a voltage value of each phase circuit of the three-phase inverter and The temperature value of the power transistor in the three-phase inverter.
The electric vehicle inverter fault detection and processing method according to claim 12, wherein the method further comprises: a current value and a voltage of each of the three-phase inverters based on a reference voltage value; The values are normalized to map them to the range [0, 4096].
The electric vehicle inverter fault detection and processing method according to claim 13, wherein the method further comprises: if any of the current value and the voltage value of each of the three-phase inverters One in the range [2007, 2089], it is determined that the three-phase inverter has not failed, otherwise it is determined that the three-phase inverter has failed.
The electric vehicle inverter fault detection and processing method according to claim 12, wherein the method further comprises: determining if a temperature value of the power transistor in the three-phase inverter is within a predetermined range The three-phase inverter has not failed, otherwise it is determined that the three-phase inverter has failed.
The electric vehicle inverter fault detection and processing method according to claim 13, wherein the reference voltage value is obtained by actually detecting the calibration.
An electric vehicle inverter fault detecting and processing apparatus, the electric vehicle inverter fault detecting and processing apparatus comprising a running state fault detecting unit configured to be when an electric vehicle is in a running state Acquiring, in real time, signals from at least one sensor located on each of the bridge arms of the three-phase inverter to obtain at least one inverter travel state parameter, and determining the said based on the at least one inverter travel state parameter Whether the three-phase inverter has failed and its fault level, and if it is determined that the three-phase inverter has failed, a predetermined fault handling operation is performed according to the determined fault level.
The electric vehicle inverter failure detecting and processing apparatus according to claim 17, wherein said apparatus further comprises an activation state failure detecting unit configured to be powered by means of powering up When the electric vehicle is started, a signal from the at least one onboard sensor is acquired to acquire at least one activation parameter, and accordingly, based on the at least one activation parameter, detecting whether a three-phase inverter in the electric vehicle has failed, and if it is determined If the three-phase inverter fails, a predetermined fault handling operation is performed.
A storage medium for storing computer readable instructions, the computer readable instructions being executable by one or more processors to implement an electric vehicle inverter fault detection according to any one of claims 1-16 And the steps of the processing method.