Title of Invention

EXCITATION CIRCUIT AND CONTROL METHOD FOR FLUX SWITCHING MOTOR

Abstract An excitation circuit for a flux switching motor. The circuit includes a low-value film capacitor across the DC side of a bridge rectifier. A plurality electronic switches are arranged in an H-bridge configuration for switching current flow through an armature winding of the motor in accordance with a PWM control scheme and single-pulse control scheme controlled by a microcontroller. A start-up diode is placed across the field winding of the motor and is electronically switched out of the circuit after a startup phase of the motor has completed. The circuit implements armature energy recirculation through the field winding during startup to promote more uniform and quicker startup of the motor. The use of a film capacitor improves the power factor of the circuit, helps to eliminate the introduction of harmonics into the AC voltage source, and helps in mitigating EMI. Reverse commutation is used to bring the motor to a quick stop when it is powered off.
Full Text N/A

Documents:

962-mumnp-2005-abstract(12-03-2007).doc

962-mumnp-2005-abstract(12-03-2007).pdf

962-mumnp-2005-cancelled pages(12-05-2007).pdf

962-mumnp-2005-claims(granted)-(12-05-2007).doc

962-mumnp-2005-claims(granted)-(12-05-2007).pdf

962-mumnp-2005-correspondence(07-08-2007).pdf

962-mumnp-2005-correspondence(ipo)-(23-05-2007).pdf

962-mumnp-2005-drawing(12-03-2007).pdf

962-mumnp-2005-form 1(18-10-2005).pdf

962-mumnp-2005-form 1(30-08-2005).pdf

962-mumnp-2005-form 18(06-02-2004).pdf

962-mumnp-2005-form 2(granted)-(12-05-2007).doc

962-mumnp-2005-form 2(granted)-(12-05-2007).pdf

962-mumnp-2005-form 26(28-11-2004).pdf

962-mumnp-2005-form 3(07-03-2006).pdf

962-mumnp-2005-form 3(30-08-2005).pdf

962-mumnp-2005-form 5(30-08-2005).pdf

962-mumnp-2005-form-pct-isa-210(30-08-2005).pdf

962-mumnp-2005-form-pct-isa-220(30-08-2005).pdf

962-mumnp-2005-form-pct-isa-237(30-08-2005).pdf


Patent Number 210443
Indian Patent Application Number 962/MUMNP/2005
PG Journal Number 43/2007
Publication Date 26-Oct-2007
Grant Date 04-Oct-2007
Date of Filing 30-Aug-2005
Name of Patentee BLACK & DECKER INC.
Applicant Address 1207 DRUMMOND PLAZA, NEWARK, DELAWARE 19711.
Inventors:
# Inventor's Name Inventor's Address
1 BHANU GORTI 3205 LANHAM DRIVE, ABINGDON, MARYLAND 21009
PCT International Classification Number H02P1/00
PCT International Application Number PCT/US2004/003297
PCT International Filing date 2004-02-05
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10/360,968 2003-02-07 U.S.A.