Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2006-02-21
2006-02-21
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
C318S254100
Reexamination Certificate
active
07002311
ABSTRACT:
A microcontroller emulates advancement of a speed sensor for a motor, rather than having a physical movement of the speed sensor. The microcontroller calculates an advancement time based on the motor's efficiency. The microcontroller measures a motor speed utilizing a tachometer signal transmitted from the speed sensor. The microcontroller subtracts the emulated advancement time from the motor speed to generate a commutation countdown time. The microcontroller switches or commutates outputs when the commutation countdown time has elapsed. The microcontroller measures an actual advance time, which is a time between the commutating of the outputs and a receipt of the next speed sensor interrupt. The microcontroller calculates an anticipated motor speed by adding the actual advance time to the commutation countdown time.
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Brewer Carl
Strike Nigel
Minebea Co. Ltd.
Pillsbury Winthrop Shaw & Pittman LLP
Ro Bentsu
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