Title: Method and apparatus for controlling synchronous motor

Abstract: In the control of a synchronous motor driven by a power converter of voltage source type, the phase of the current flowing into the motor is detected and gate signals are produced on the basis of the phase of the current, so that the output frequency of the power converter is controlled by the gate signals so as to control the motor.

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Inventors: Miyasita, Kunio (Hitachi, JA)
Okuda, Hironori (Hitachi, JA)
Sugiura, Yasuyuki (Takahagi, JA)
Maeda, Takeo (Hitachi, JA)
Matsuda, Yasuo (Hitachi, JA)
Honda, Kazuo (Hitachi, JA)

Application Number: 512924
Filing Date: 1974-10-07
Publication_date: 1976-12-14
Assignee: Hitachi, Ltd. (JA)
Primary Class(es): 318/713
Other Classes:
US Patent Ref:

3444451	May, 1969	Schlabach et al.	318/231.
3619749	Nov, 1971	Schieman	318/231.
3718847	Feb, 1973	Graf et al.	318/231.
3800199	Mar, 1974	Weigand	318/171.
3819992	Jun, 1974	Opal et al.	318/171.
3832611	Aug, 1974	Onoda et al.	318/171.

Other Refs:
Primary Examiner: Rubinson, Gene Z.
Assistant Examiner:
Attorney: Craig & Antonelli