Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2006-06-20
2006-06-20
Duda, Rina (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
C318S132000, C318S254100, C318S244000, C318S246000, C318S253000, C318S293000
Reexamination Certificate
active
07064509
ABSTRACT:
An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capacitor partially sources the motor current ripples during commutation and recharges itself during the off-commutation period. Since the number of commutation events per mechanical revolution is pre-determined once the DC motor is designed, the frequency of the AC ripple currents through the capacitor corresponds to the frequency of commutation, and thus a motor position of the DC motor.
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Aiello Frank J.
Fu Zhenxing
Haas Frank J.
Winkelman James R.
Yockey Karienne A.
Brinks Hofer Gilson & Lione
Duda Rina
Smith Tyrone
Visteon Global Technologies Inc.
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