Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2006-02-07
2006-02-07
Duda, Rina (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S132000, C318S434000, C318S459000, C318S500000, C388S928100
Reexamination Certificate
active
06995530
ABSTRACT:
A system and a method for starting a brushless DC motor are provided. The method includes applying commutation pulses to at least two phase coils to induce a rotor to rotate to a starting position and then de-energizing the at least two phase coils. The method further includes applying commutation pulses to at least two phase coils to induce the rotor to rotate from the starting position in a predetermined direction. The method further includes de-energizing all phase coils for a first time interval after the rotor is rotating and sampling a back EMF signal in at least one of the phase coils to determine a first value indicative of an electrical period of the back EMF signal or a portion of an electrical period of the back EMF signal. Finally, the method includes applying commutation pulses to at least two phase coils for a second time interval, the second time interval being based on the first value.
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Biamonte Jeffrey R.
Harrington Raymond J.
Trifilo Timothy
Cantor & Colburn LLP
Duda Rina
Gonzalez Floyd A.
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