Electricity: motive power systems – Synchronous motor systems – Synchronization systems
Reexamination Certificate
2005-09-06
2005-09-06
Martin, David (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Synchronization systems
C318S706000, C318S710000, C318S716000, C318S721000, C318S132000, C318S254100, C318S434000, C318S432000, C318S700000, C318S800000, C318S802000, C318S805000, C318S806000
Reexamination Certificate
active
06940250
ABSTRACT:
In a synchronous motor control device that corrects a deviation in rotational position which is related to a rotational position detector for a synchronous motor on which vector-control is performed, the synchronous motor control device includes: a current instruction generator that disables a torque instruction to set d-axis and q-axis current instructions as zero when a phase correction instruction is inputted; a current controller that outputs d-axis and q-axis voltage instructions based on the d-axis and q-axis current instructions; a phase correction quantity detector for determining the amount of offset in which the d-axis voltage instruction becomes zero when the phase correction instruction is inputted and the d-axis voltage instruction is not zero; an adder for adding a rotor positional angle and the amount of offset; and a voltage converter for determining three-phase voltage instructions based on the additional value, the d-axis and q-axis voltage instructions.
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Nakayama Masakazu
Nishimura Shinji
Hiruy Elias B.
Martin David
Mitsubishi Denki & Kabushiki Kaisha
Sughrue & Mion, PLLC
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