Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2005-07-12
2005-07-12
Lp, Paul (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
C318S293000, C318S254100, C360S069000, C360S075000
Reexamination Certificate
active
06917172
ABSTRACT:
A motor controller for an electric motor having a plurality of motor terminals is connected to a power supply and comprises a commutation control, a current sensor, a peak target circuit, a pulse width control and a reverse current control. The commutation control is connected to the motor terminals for causing current pulses to flow through selected terminals during each commutation state. The current sensor provides a sense signal representative of the current pulses, and the peak current target circuit provides a target signal. The pulse width control controls pulse width of the current pulses as a function of the sense signal and the target signal. The reverse current control prevents reverse current from flowing into the power supply during change of commutation state.
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Brenden Jason P.
Peterson Michael J.
Agere Systems Inc.
Kinney & Lange , P.A.
Lp Paul
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