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Feedforward control of permanent magnet synchronous motor drive under current sensing failure

A technology of motor control and current control, applied in the field of steering system, can solve the problems of high consistency and accuracy of feedback current control

Active Publication Date: 2020-05-26
STEERING SOLUTIONS IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, feedforward current control is the mode of operation for motor control systems with current sensing failures, and is not as consistent and accurate as feedback current control, especially due to its sensitivity to motor control parameter estimation

Method used

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  • Feedforward control of permanent magnet synchronous motor drive under current sensing failure
  • Feedforward control of permanent magnet synchronous motor drive under current sensing failure
  • Feedforward control of permanent magnet synchronous motor drive under current sensing failure

Examples

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Embodiment Construction

[0016] As used herein, the terms module and sub-module refer to one or more processing circuits, such as application-specific integrated circuits (ASICs), electronic circuits, processors (shared, dedicated or group) and memory, combinational logic, and / or other suitable components that provide the described functionality. It is understood that the sub-modules described below may be combined and / or further divided.

[0017] It should be noted that the technical solutions are described herein with reference to specific embodiments and with reference to one or more drawings, but are not limited thereto. It should be understood that the disclosed embodiments are only illustrations of technical solutions, and these technical solutions can be varied alternative forms. The figures are not necessarily to scale; some features are exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be inte...

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PUM

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Abstract

According to one or more embodiments, an example system includes a motor, and a motor control system that includes a low side current measurement subsystem. The system further includes a processor that switches the motor control system to use feedforward current control in response to detecting a current measurement failure in the low side current measurement subsystem. The processor further identifies a first phase that has a failed current measurement. The processor also computes a current measurement for the first phase, which has the current measurement failure. The processor further usesthe computed current measurement to compute a parameter estimate.

Description

technical field [0001] The present invention relates generally to steering systems and in particular to feed-forward control of permanent magnet synchronous motor drives under current sensing faults. Background technique [0002] Generally, a motor control system such as in an Electric Power Steering (EPS) system controls the electric motor by applying voltage to the electric motor. For example, an EPS system uses an electric motor to provide steering assistance to an operator of a steering wheel of a vehicle using a torque control method. When using a permanent magnet synchronous motor (PMSM), field oriented control (FOC) is used to convert alternating current (AC) three-phase motor voltage and current signals into a synchronous rotating frame commonly referred to as the d / q axis reference frame. In the d / q axis reference frame, the motor voltage and current become direct current (DC) quantities. Generally, the FOC torque control technique is implemented using a feed-forw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/22B62D5/04
CPCH02P21/14H02P21/22B62D5/049B62D5/0484H02P2207/05H02P6/28H02P29/027H02P21/0017G01R19/0092B60L15/025H02P23/14H02P2205/01B62D5/0463
Inventor P·普拉莫德V·戈文杜张喆K·M·P·K·南博里
Owner STEERING SOLUTIONS IP HLDG
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