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Fault-tolerant fault detection and protection method for electric drive assembly controller

A technology of fault detection and controller, which is applied in the field of signal diagnosis, can solve problems such as the inability to judge the authenticity of faults, and achieve the effects of avoiding startup failure, ensuring accuracy, and improving quality

Active Publication Date: 2021-11-19
ZHEJIANG LEAPMOTOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the technical problem that the authenticity of the detected fault cannot be judged in the existing fault detection method of the electric drive assembly controller; it provides a fault-tolerant fault detection and protection method for the electric drive assembly controller, Distinguish the authenticity of detected faults, largely avoiding the failure of the vehicle to start due to misdetection of drive faults

Method used

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  • Fault-tolerant fault detection and protection method for electric drive assembly controller
  • Fault-tolerant fault detection and protection method for electric drive assembly controller
  • Fault-tolerant fault detection and protection method for electric drive assembly controller

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Embodiment 1

[0052] Embodiment 1: A fault-tolerant fault detection and protection method for an electric drive assembly controller in this embodiment, such as figure 1 shown, including the following steps:

[0053] A) set the time interval from receiving the request signal for starting the vehicle to the full start of the vehicle as T, in this embodiment T=3 seconds;

[0054] B) After receiving the request signal to start the vehicle, perform fault detection on the controller of the electric drive assembly;

[0055] C) Judging whether a fault is detected within the time interval T, if no fault is detected, then the output electric drive assembly controller has no fault, and the vehicle starts normally; if a fault is detected, proceed to step D);

[0056] Further, within the time interval T, if no fault is detected within the continuous T' time, the output electric drive assembly controller has no faults, and the fault detection is stopped, and the vehicle starts normally after the complet...

Embodiment 2

[0077] Embodiment 2: A fault-tolerant fault detection and protection method for an electric drive assembly controller in this embodiment, since the fault signal will attenuate during the process from the drive board to the voltage conversion chip, in order to ensure that the voltage conversion chip receives The quality of the fault signal, this embodiment performs attenuation compensation on the fault signal received by the voltage conversion chip U11 on the basis of Embodiment 1, specifically including:

[0078] ① Obtain the standard attenuation compensation function:

[0079] i) Make an attenuation compensation function acquisition model, the attenuation compensation function acquisition model includes a drive board fault signal output simulator, a communication cable and a voltage conversion chip, and the drive board fault signal output simulator can simulate an output drive board fault signal, The communication cable is excellent in manufacturing process and has the same s...

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Abstract

The invention discloses a fault-tolerant fault detection and protection method for an electric drive assembly controller. The method comprises the following steps of A) setting a time interval from receiving a request signal for starting a whole vehicle to completely starting the whole vehicle as T; B) after a request signal for starting the whole vehicle is received, fault detection being carried out on the electric drive assembly controller; C) judging whether a fault is detected within the time interval T or not, if not, outputting that the electric drive assembly controller has no fault, and normally starting the whole vehicle; if a fault is detected, entering a step D); D) judging whether the detected fault is true or false, if the detected fault is a false fault, outputting that the electric drive assembly controller has no fault, and normally starting the whole vehicle; and if the detected fault is a true fault, outputting that the electric drive assembly controller has a fault, and forbidding the starting of the whole vehicle. The method is advantaged in that authenticity of the detected fault is judged, so a problem of starting failure of the whole vehicle caused by false detection of the driving fault is avoided to a great extent.

Description

technical field [0001] The invention relates to the technical field of signal diagnosis, in particular to a fault-tolerant fault detection and protection method for an electric drive assembly controller. Background technique [0002] With the popularization of charging piles and the strong support of national policies, the development of new energy vehicles is becoming increasingly rapid, the market continues to grow at a high speed, and technology continues to develop and innovate. More and more people choose new energy vehicles as their means of transportation, which can save energy row, and can save the cost of the car. Under such a development situation, the driving safety, stability, comfort and user satisfaction of new energy vehicles are increasingly concerned. The electric drive assembly controller is the core component of the new energy vehicle, providing it with operating power. In the electric drive assembly controller, the IGBT power tube is the core component o...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0213G05B2219/24065Y02T10/72
Inventor 赵龙飞李小龙𠚵非凡
Owner ZHEJIANG LEAPMOTOR TECH CO LTD
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