Electricity: motive power systems – Synchronous motor systems – Field winding circuits
Reexamination Certificate
2007-08-07
2007-08-07
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Field winding circuits
C318S700000, C318S811000
Reexamination Certificate
active
11356310
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
Suzuki Kentaro
Yasui Kazuya
Yuuki Kazuaki
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