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EPS and motor control method and device and temperature detection method and device therefor

A technology of motor control and motor temperature, which is applied in the EPS field, can solve the problems of difficult motor, motor function decline, burnout, etc., and achieve the effect of preventing burnout, preventing function decline, and good adjustment effect

Inactive Publication Date: 2018-10-09
SAIC MOTOR
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Problems solved by technology

Moreover, the external heat dissipation conditions of the ECU are different from those of the motor, so it is difficult to deduce the accurate temperature of the motor according to different heat dissipation adjustments
[0008] Because it is difficult to obtain accurate motor temperature, it is also difficult to control the motor reasonably, and it is easy to cause the function of the motor to decline at high temperature, or even be burned.

Method used

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  • EPS and motor control method and device and temperature detection method and device therefor
  • EPS and motor control method and device and temperature detection method and device therefor
  • EPS and motor control method and device and temperature detection method and device therefor

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Embodiment Construction

[0040] As mentioned above, in one measure of the prior art, the temperature of the motor of the EPS is obtained by using an indirect measurement method, such as installing a temperature sensor in the ECU, and estimating the temperature of the motor by measuring the temperature around the temperature sensor inside the ECU . However, in actual operation, the above estimation method has a large deviation, and the obtained motor temperature is often not accurate enough. Because it is difficult to obtain accurate motor temperature, it is also difficult to control the motor reasonably, and it is easy to cause the function of the motor to decline at high temperature, or even be burned.

[0041] The inventors of the present invention have found through research that the key to the above problem is that the corresponding relationship between the temperature inside the ECU and the temperature inside the motor is too weak. Specifically, the internal structure and external environment of...

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Abstract

The invention relates to an EPS and a motor control method and device and a temperature detection method and device therefor. The motor control method for the EPS comprises the following steps that amagnetic linkage value of a motor is determined; a correspondence table, which is obtained by a scaling method and used to indicate correspondence between different magnetic linkage values and temperatures of the motor, is searched according to the magnetic linkage value of the motor so as to determine the temperature of the motor; and a current of the motor is adjusted on the basis of the motor temperature. Thus, the more accurate motor temperature can be obtained, the current of the motor is adjusted to control the motor temperature, and thus, the motor is effectively prevented from functional decrease or event burn-out at high temperature.

Description

technical field [0001] The invention relates to the field of EPS motor control, in particular to a motor control method and device for EPS, a temperature detection method and device, and EPS. Background technique [0002] As one of the research hotspots and cutting-edge technologies of automobile technology, the electric power steering system (Electric PowerSteering System, EPS) provides steering assistance directly by the motor, eliminating the need for power steering oil pumps, hoses, hydraulic oil, Conveyor belts and engine-mounted pulleys save energy and protect the environment. In addition, it also has the characteristics of simple adjustment, flexible assembly and power steering under various conditions. [0003] Based on the above characteristics, EPS is gradually replacing the traditional hydraulic power steering system and becoming the standard configuration of some models on the market. When the car is running at low speed, EPS relies on the motor to provide auxi...

Claims

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Application Information

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IPC IPC(8): H02P29/60
Inventor 郑虎张平丰烨顾頔朱文勃
Owner SAIC MOTOR
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