Control device for synchronous motor

Details Control device for synchronous motor Control device for synchronous motor

2008-03-25

2008-03-25

Duda, Rina I. (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S811000, C318S132000, C318S434000, C318S254100

Reexamination Certificate

active

07348749

ABSTRACT:
A control device is provided for a synchronous motor, which drives the synchronous motor through a voltage operated PWM inverter and controls a torque and a speed of the motor, including a unit for causing a PWM carrier signal to have an arbitrary phase difference between two phases such UV, VW, or WU in three phases of U, V, and W, a unit for extracting a high frequency voltage and a high frequency current, which are thus generated from a detecting voltage or a command voltage and a detecting current, and a unit for estimating a position of a magnetic flux or position of a magnetic pole by using the high frequency voltage and the high frequency current which are excited.

REFERENCES:
patent: 5057759 (1991-10-01), Ueda et al.
patent: 6396229 (2002-05-01), Sakamoto et al.
patent: 6462492 (2002-10-01), Sakamoto et al.
patent: 2001/0002784 (2001-06-01), Masaki et al.
patent: 2002/0163319 (2002-11-01), Kaneko et al.
patent: 2003/0020429 (2003-01-01), Masaki et al.
patent: 2002-78391 (2002-03-01), None
patent: 2003-52193 (2003-02-01), None

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