Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Reexamination Certificate
2006-07-21
2008-03-04
Ip, Paul (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
C318S719000, C318S721000, C318S808000
Reexamination Certificate
active
07339344
ABSTRACT:
A plurality of parameters of a Permanent Magnet Synchronous Motor (PMSM) is determined by a motor controller for differentiating between a plurality of PMSMs. This is achieved by first applying regulated DC motor currents at a commanded fixed rotor angle and measuring a quadrature voltage; parking the PMSM at standstill, Then, after selecting an initial set of controller parameters; applying the quadrature voltage equal to zero and measuring a time constant. Then, accelerating the PMSM with a constant torque up to a preset target speed and measuring a total acceleration time taccelerateuntil the preset target speed ωtargetis reached. After regulating a stator current at 0 value, measuring the quadrature voltage and a freewheeling motor speed ωfreewheelimmediately after applying the 0 stator current; and calculating an electrical constant KEof the PMSM; a load inertia J; and a set of parameters for the controller.
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Mathworks: SimPower Systems library for Simulink, no date.
International Rectifier Corporation
Ip Paul
Ostrolenk Faber Gerb & Soffen, LLP
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