[특허]Brushless doubly-fed motor control system

Brushless doubly-fed motor control system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-005/34
출원번호	US-0742568 (1991-08-07)
발명자 / 주소	Lauw Hian K. (Corvallis OR)
출원인 / 주소	The State of Oregon Acting by and through the State Board of Higher Education on Behalf of Oregon State University (Eugene OR 02)
인용정보	피인용 횟수 : 64 인용 특허 : 0

초록 ▼

An AC variable speed drive (VSD) system having a brushless doubly-fed motor receives power from an electric power grid at a system frequency of the grid and drives a mechanical load. The motor has a rotor with rotor windings and a stator with stator windings comprising first and second polyphase stator systems. The first stator system receives power from the grid at the system frequency. A sensor senses a parameter of the received power by the drive and produces a corresponding power sensor signal. A VSD controller receives and processes the power sensor signal and a reference signal which has been established according to a desired motor operation strategy, and generates therefrom a controller signal. A converter, such as a power electronic converter, receives and converts power from a converter power source according to the controller signal to produce excitation power at an excitation frequency. The converter injects the excitation power into the second stator system at the excitation frequency. An AC variable speed drive, a VSD controller, and a frequency source excitation power generator are each described. A related method of controlling an AC variable speed drive is also described. An additional method of controlling a brushless doubly-fed motor driving a load at infinitely variable speeds between substantially zero speed and an upper speed limit while maintaining substantially synchronous operation at any such speed is also described.

대표청구항 ▼

A method of controlling a motor driving a load at infinitely variable speeds between substantially zero speed and an upper speed limit, the method comprising the steps of: providing a motor having a brushless rotor unit without slip rings and with rotor windings, with the motor also having a stator unit with stator windings comprising first and second polyphase stator systems; applying power to the first stator system from an electric power grid at a system frequency of the grid; monitoring a parameter of the power received by the motor from the electric power grid and producing a motor power input signal corresponding to the monitored parameter; establishing a reference signal according to a desired motor operation strategy; generating excitation power at a controlled frequency and amplitude in response to the monitored motor power input signal and the established reference signal; and injecting the excitation power at the controlled frequency and amplitude into the second stator system for operating the motor with a linear torque-speed characteristic at any motor speed between substantially zero speed and the upper speed limit.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Brushless doubly-fed motor control system 원문보기

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Brushless doubly-fed motor control system 원문보기

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이 특허를 인용한 특허 (64)

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