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Circuit protection control method and system of motor controller

A motor controller and circuit protection technology, which is applied in the direction of control drive, emergency protection circuit device, electric vehicle, etc.

Pending Publication Date: 2021-05-11
LEADRIVE TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to ensure zero torque or safe braking torque under complex application conditions, especially in the medium speed zone, and avoid device damage caused by excessive reverse charging voltage.

Method used

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  • Circuit protection control method and system of motor controller
  • Circuit protection control method and system of motor controller
  • Circuit protection control method and system of motor controller

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Embodiment Construction

[0047] The advantages of the present invention are further described below with reference to the accompanying drawings and specific embodiments.

[0048] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

[0049] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. As used in this disclosure and the appended claims, the singular forms "a," "the," an...

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Abstract

The invention provides a circuit protection control method and system for a motor controller. The method comprises the following steps: calibrating a first braking torque-rotating speed curve and a second braking torque-rotating speed curve for a motor in ASC and SPO states; calibrating a safe torque curve, enabling the safe torque curve and the first braking torque-rotating speed curve to be intersected at a first intersection point, and the first braking torque-rotating speed curve and the second braking torque-rotating speed curve to be intersected at a second intersection point; determining a first rotating speed threshold value and a second rotating speed threshold value; detecting the current rotating speed of the motor, and when the current rotating speed is smaller than or equal to a first rotating speed threshold value, executing SPO protection; when the current rotating speed is larger than the first rotating speed threshold value and smaller than the second rotating speed threshold value, executing ASC or SPO alternative protection; and when the current rotating speed is larger than or equal to the second rotating speed threshold value, executing ASC protection. After the technical scheme is adopted, the method is suitable for active safety control of various pure electric / hybrid vehicle type motor controllers, and flexible control logic corresponding to various use conditions is provided.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a circuit protection control method and system of a motor controller. Background technique [0002] In the application of new energy vehicles, the normal operation of the electric drive system composed of the motor and the motor controller is extremely important. Once the electric drive system fails, it may cause device damage or even casualties. Therefore, in the event of failure of the electric drive system, it needs to fail-safe and enter the active safety control, output zero torque or acceptable safe braking torque to stop the vehicle slowly, so that the driver can safely leave the lane for processing. Among them, the two most common active safety control measures are SPO (Switching Pulse Off), that is, full shutdown state and ASC (Active Short Circuit), that is, active short circuit. The SPO implementation method is to disconnect all the switches, and the ASC realizes the sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08B60L15/20
CPCB60L15/20H02H7/0822H02H7/0833H02H7/0844Y02T10/72
Inventor 李帆远
Owner LEADRIVE TECH (SHANGHAI) CO LTD