Controller for synchronous machine

Electricity: motive power systems – Synchronous motor systems – Field winding circuits

Reexamination Certificate

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C318S700000, C318S811000

Reexamination Certificate

active

07443126

ABSTRACT:
A controller for a synchronous machine includes: a power converter; a synchronous machine driven by the power converter; a PWM modulation section for controlling the synchronous machine; a current detection section which detects a current conducted to the synchronous machine; a voltage detection section which detects a voltage applied to the synchronous machine; a current variation operation section which operates a current variation during a time interval between timings synchronized with detection sampling in the current detection section; a voltage integration operation section which operates a voltage integration value during a time interval between the same timings as the timings in the current variation operation section; a current variation operation section for a time interval in which all sets are included, defining, as one set, the current variation and the voltage integration value, and operating a current variation during the time interval in which all the sets are included; a voltage integration operation section for the time interval in which all the sets are included, integrating a voltage during the same time interval as the time interval in the current variation section for the time interval in which all the sets are included; and a rotation phase angle assumption section which assumes a rotation phase angle of the synchronous machine.

REFERENCES:
patent: 08-205578 (1996-08-01), None
K. Yasui et al., U.S. PTO Notice of Allowance and Fee(s) Due, U.S. Appl. No. 11/808,194, Jun. 9, 2008, 10 pages.

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