Start-up and restart of interior permanent magnet machines

一种永久磁体、电机转子的技术，应用在单个同步机的启动器、发动机的起动、发动机用电动机起动等方向，能够解决电机失去同步等问题

Active Publication Date: 2007-12-26
GENERAL MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a failure of the processor controlling an IPM motor could throw said motor out of sync

Method used

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  • Start-up and restart of interior permanent magnet machines
  • Start-up and restart of interior permanent magnet machines
  • Start-up and restart of interior permanent magnet machines

Examples

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Embodiment Construction

[0017] The following description of different embodiments of the invention is merely exemplary in nature and 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 term module and / or device refers to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated or combined) and memory, a combinational logic circuit or Other suitable components that provide the described functionality.

[0018] In general, in connection with starting and / or restarting an IPM machine, it is preferable to initialize the states of the synchronous current regulators and observers used to estimate the rotor position in such a way as to avoid torque ripple. Proper initialization of the current regulator is especially desirable at high speeds when the back EMF of the motor is very high.

[0019] Accordingly, in on...

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Abstract

A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based on the estimated initial speed. This method can provide smooth startup and / or restart at any speed.

Description

technical field [0001] The present invention relates generally to internal permanent magnet (IPM) electric machines, and more particularly to the starting and restarting of IPM electric machines. Background technique [0002] Internal permanent magnet motors are used in many different applications including, but not limited to, vehicular applications. For example, an IPM electric machine may be used in a vehicle alternator-starter (alternator-starter) system to turn the engine crankshaft for engine starting and generate electricity for the vehicle electrical loads. In some vehicles, energy is saved and emissions are reduced by "running and shutting down" operation, that is, by running and shutting down the engine according to emissions and gasoline consumption levels. Such engines may require repeated starts, for example, during stop-and-go operation in urban areas. [0003] Not only in vehicle applications but also in other applications, several conditions can affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/46
CPCH02P6/20H02P1/46F02N2200/041F02N11/0859H02P21/0032F02N11/04H02P21/34
Inventor N·R·佩特尔S·E·舒尔茨T·P·奥米拉
Owner GENERAL MOTORS CORP
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