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Position sensor fault tolerant control for automotive propulsion system

A sensor and rotor position technology, applied in the field of electric motors, can solve problems such as poor performance

Inactive Publication Date: 2006-05-03
GENERAL MOTORS COMPANY
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  • Abstract
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AI Technical Summary

Problems solved by technology

The performance of open loop V / Hz type control is poor compared to IFOC control

Method used

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  • Position sensor fault tolerant control for automotive propulsion system
  • Position sensor fault tolerant control for automotive propulsion system
  • Position sensor fault tolerant control for automotive propulsion system

Examples

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Embodiment Construction

[0025] The following descriptions of preferred embodiments are exemplary only and are in no way intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers have been used in the drawings to identify similar elements. As used herein, the terms "module" and / or "device" refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory, combinational logic, that executes one or more software or firmware programs circuits or other suitable components that provide the described functionality.

[0026] Upon detection of a position / speed sensor failure the present invention turns to a sensorless based motor control algorithm to maintain at least a minimum amount of propulsion torque. The sensorless position estimator module uses a saliency-based technique at low speeds and a back-electromotive force (emf)-based technique at high speeds. With this combination, the s...

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Abstract

A control system for a rotor motor, which includes a sensorless sensing module, the sensorless sensing module includes a salient polarity-based estimator module that generates a first rotor position signal based on the salient polarity and a second rotor position signal that generates a second rotor position signal based on a counter electromotive force Back electromotive force (emf) estimator module for rotor position signal. For rotor speeds below the first rotor speed, the selector selects the first rotor position signal, and for rotor speeds above the first rotor speed, selects the second rotor position signal. The rotor position sensor detects the position of the rotor and generates a third rotor position signal. The fault detection module detects a fault in the rotor position sensor, outputs a third rotor position signal when no fault is detected, and outputs one of the first and second rotor position signals when a fault is detected. An indirect field oriented control (IFOC) system controls the motor based on a selected one of the first, second and third rotor position signals.

Description

technical field [0001] The present invention relates to electric motors, and more particularly, to motor control utilizing sensor-based and sensorless methods. Background technique [0002] Electric motor drives are becoming more and more popular in automatic systems every year. As hybrid and electric vehicles become more popular, the number of autonomous AC drive systems in the field will grow exponentially. They can be used as part of the propulsion system in electric or hybrid vehicles. In typical applications, motor drives require position or speed sensor devices to properly control the motor. Fault tolerance and robustness are important factors in ensuring trouble-free vehicle operation. In a typical drive system, the failure of a position / speed sensor results in a loss of propulsion failure. This can hamstring the driver and prevent the vehicle from moving. [0003] Most fault detection and fault tolerance methods focus on faults in the power semiconductors in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00H02P6/12H02P6/14H02P6/16H02P6/18
CPCB60L3/0038H02P2203/05Y02T10/64
Inventor S·E·舒尔兹S·E·格利森N·R·帕特尔J·M·纳加施马Y·-S·永S·K·苏M·米拉尼
Owner GENERAL MOTORS COMPANY
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