Device to control the speed of two-phase or three-phase motors

Details Device to control the speed of two-phase or three-phase motors Device to control the speed of two-phase or three-phase motors

1990-07-12

1992-04-14

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318807, 363132, 363 41, 378 93, H02P 0540, H01J 3510

Patent

active

051051419

ABSTRACT:
Disclosed are a device and a method to control the speed of two-phase or three-phase A.C. motors by means of a three-phase converter. The switching-over instants of the switches of the converter for the control of a two-phase motor are computed so that the signals at the common points of each pair of switches are phase shifted with respect to one another and have no low-order harmonic components. The disclosed device and method are applicable to motors driving rotating anodes for X-ray tubes.

REFERENCES:
patent: 4006391 (1977-02-01), Deering et al.
patent: 4774448 (1988-09-01), Yoshitomi
patent: 4829551 (1989-05-01), Resnick et al.
patent: 4849871 (1989-07-01), Wallingford
"PESC 1989 Record Volume II", IEEE Power Electronics Specialists Conference, pp. 570-578.
"Static Frequency Converter for Supplying an Asynchronous Two-Phase Motor", IEE Proceedings, pp. 57-60.

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