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Overheat protection method of EPS system

A technology of overheating protection and thermal resistance, which is applied in the control system, electrical components, motor control, etc., can solve the problems of slow thermal protection, driver discomfort, and too fast thermal protection intervention, so as to improve accuracy and the method is simple and effective Effect

Inactive Publication Date: 2020-09-01
XINXIANG AIDIWEI AUTOMOTIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, a combination of motor thermal protection and ECU thermal protection is used to protect the motor and controller. The temperature rise of the ECU is obtained through the thermistor on the power board, and the motor thermal protection is obtained by calculating the calorific value of the current. , but often due to inaccurate thermal estimation of the system, the thermal protection is slow and the motor or ECU is burned, or the thermal protection intervenes too quickly, causing the driver to feel uncomfortable due to the increase of hand force

Method used

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  • Overheat protection method of EPS system
  • Overheat protection method of EPS system
  • Overheat protection method of EPS system

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0023] A kind of overheating protection method of EPS system, such as figure 1 shown, including the following steps:

[0024] Step 1: Record the parts of the EPS system components that withstand high current as the first type of components, and the components of the EPS system that withstand low currents as the second type of components;

[0025] Step 2: Estimate the overheat protection currents of the first type of components and th...

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Abstract

The invention provides an overheat protection method for an EPS system, and the method comprises the following steps: 1, recording a part, bearing a large current, in EPS system parts as a first typepart, and recording a part, bearing a small current, in the EPS system parts as a second type part; 2, respectively estimating overheat protection currents of the first type of components and the second type of components in real time, and respectively recording the overheat protection currents as I1 and I2; and 3, taking the minimum value of the overheat protection current I1 and the overheat protection current I2 as the overheat protection current of the EPS system, wherein when the overheat protection current I1 and the overheat protection current I2 are equal, the overheat protection current I1 and the overheat protection current I2 can be used as the overheat protection current of the EPS system. According to the technical scheme, the parts of the EPS system are classified according to the magnitude of the borne current, the overheating protection current of the parts is estimated, the minimum overheating protection current of the parts is met, and therefore overheating protectionof the parts of the EPS system is achieved, and the accuracy of overheating estimation and overheating protection of the system is improved.

Description

technical field [0001] The invention relates to automobile power steering technology, in particular to an overheat protection method of an EPS system. Background technique [0002] Because the EPS motor works for a short time, if the system has no thermal protection and the current is high, the motor will be damaged within a short time (2 to 3 minutes). Usually, a combination of motor thermal protection and ECU thermal protection is used to protect the motor and controller. The temperature rise of the ECU is obtained through the thermistor on the power board, and the motor thermal protection is obtained by calculating the calorific value of the current. , but often due to inaccurate thermal estimation of the system, the thermal protection is slow and the motor or ECU is burned, or the thermal protection intervenes too quickly, causing the driver to feel uncomfortable due to increased hand force. Contents of the invention [0003] Aiming at the problems in the prior art, t...

Claims

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Application Information

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IPC IPC(8): H02P29/60B62D5/04
CPCB62D5/0481H02P29/60
Inventor 张金萍姚坤鹏王伟殷飞
Owner XINXIANG AIDIWEI AUTOMOTIVE TECH