Electricity: motive power systems – Motor load – armature current or force control during... – Initial – 'cracking' or 'starting from rest' torque control
Reexamination Certificate
2006-04-04
2006-04-04
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Motor load, armature current or force control during...
Initial, 'cracking' or 'starting from rest' torque control
C318S254100, C318S721000
Reexamination Certificate
active
07023158
ABSTRACT:
A motor control apparatus capable of easily and reliably determining the completion of starting of a synchronous motor and not requiring an arithmetic unit having high processing ability for the determination. When an operation command including a predetermined target rotation speed is received in a state where the motor is at rest, PWM signals are created on the basis of a starting voltage set by a starting voltage setting section and a starting phase set by a starting phase setting section, whereby the motor is started. After the start of the motor, a starting rotation speed setting section makes the processing to increase the starting rotation speed. When the starting rotation speed reaches a predetermined value smaller than the target rotation speed, it is determined that the starting is completed, and a shift is made from starting operation to normal operation.
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Baker & Botts L.L.P.
Ro Bentsu
Sanden Corporation
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