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Motor control circuit and electric steering engine system

A motor control and circuit technology, applied in control systems, AC motor control, general control strategies, etc., can solve problems such as dynamic monitoring of unfavorable motor drive current, complex electromagnetic environment, and influence on the accuracy and reliability of current detection, and achieve effective It is conducive to dynamic monitoring, strong transient response ability, and low delay effect

Pending Publication Date: 2021-09-21
SICHUAN AEROSPACE FENGHUO SERVO CONTROL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electromagnetic environment where the Hall current sensor is located is relatively complex, which greatly affects the accuracy and reliability of current detection; moreover, because the working mechanism of the Hall current sensor itself has an electric-magnetic-electric conversion process, the Hall current sensor There is at least a 5μs time delay between the input and output of the motor, which is not conducive to the dynamic monitoring of the motor drive current

Method used

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  • Motor control circuit and electric steering engine system
  • Motor control circuit and electric steering engine system
  • Motor control circuit and electric steering engine system

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Embodiment Construction

[0041]The core of the present invention is to provide a motor control circuit and an electric steering gear system. The current sampling resistor is used to detect the driving current of the motor. Compared with the Hall current sensor, the time delay is lower and the transient response ability is strong, which is beneficial to the motor driving current. Moreover, the application detects the ground level of the circuit and uses it as a reference voltage, so as to calibrate the precision of the voltage signal converted by the driving current, so that the detection accuracy of the driving current is effectively improved.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a ...

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Abstract

The invention discloses a motor control circuit and an electric steering engine system. The motor control circuit comprises a driving circuit, a detection circuit and a control circuit. The driving circuit is used for driving the motor; the detection circuit is used for detecting the driving current of the motor by using a current sampling resistor and converting the driving current into a voltage signal; and detecting the ground level of a circuit where the circuit is located, and taking the ground level as a reference voltage; and the control circuit is used for subtracting the reference voltage from the voltage signal to obtain a voltage calibration value and converting the voltage calibration value into a driving current calibration value so as to regulate and control the driving circuit according to the driving current calibration value. Therefore, the current sampling resistor is used for detecting the driving current of the motor, compared with a Hall current sensor which has low time delay, the transient response capability is high, and dynamic monitoring of the driving current of the motor is facilitated; moreover, the ground level of the circuit is detected and is used as a reference voltage so that precision calibration is carried out on a voltage signal converted from the driving current, and the detection precision of the driving current is effectively improved.

Description

technical field [0001] The invention relates to the field of electric steering gear, in particular to a motor control circuit and an electric steering gear system. Background technique [0002] The motor control circuit in the electric steering gear system includes a current detection circuit, a control circuit and a drive circuit; among them, the current detection circuit is used to detect the driving current of the motor; The drive current adjustment is used to drive the drive circuit of the motor so that the drive current of the motor reaches the target drive current; when the drive current of the motor is overcurrent, the drive circuit is controlled to stop working to stop the motor. [0003] At present, in order to improve the motor closed-loop control of the electric steering gear system, the demand for detection of the motor drive current is increasing, and most of them require more accurate and timely detection of the motor drive current. In the prior art, there are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/00H02P23/14
CPCH02P23/0004H02P23/14
Inventor 刘德兴刘华峰张婧练敏姜妍张恒隆强
Owner SICHUAN AEROSPACE FENGHUO SERVO CONTROL TECH CO LTD
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