Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Reexamination Certificate
2005-05-10
2005-05-10
Martin, David (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
C318S046000, C318S047000, C318S051000, C318S811000
Reexamination Certificate
active
06891342
ABSTRACT:
A drive apparatus for driving two motors by PWM control of respective switching elements connected to the motors, whereby respective control signals are applied to the switching elements such that each commencement of a transition of one of the switching elements from the non-conducting to the conducting state coincides with the termination of a transition of the other switching element from the conducting to the non-conducting state, thereby reducing generated electrical noise, and for supplying equivalent values of drive voltage to two motors of different power ratings which rotate respective cooling fans, to obtain equalized levels of air flow rate.
REFERENCES:
patent: 4390821 (1983-06-01), Krampe et al.
patent: 4641069 (1987-02-01), Fujioka et al.
patent: 5087867 (1992-02-01), Kruppa
patent: 5352965 (1994-10-01), Kawabata
patent: 6404150 (2002-06-01), Nehl et al.
patent: 6552505 (2003-04-01), Naito
patent: 6556460 (2003-04-01), Ishida et al.
patent: 6633495 (2003-10-01), Ishda et al.
patent: 6829151 (2004-12-01), Elferich et al.
patent: 20030043605 (2003-03-01), Ishida et al.
patent: 20030107905 (2003-06-01), Miura et al.
patent: 5-118216 (1993-05-01), None
patent: 6-165307 (1994-06-01), None
patent: 6-189593 (1994-07-01), None
patent: 9-331696 (1997-12-01), None
patent: 10-8959 (1998-01-01), None
patent: 10-146098 (1998-05-01), None
patent: 2002-43910 (2002-02-01), None
U.S. Appl. No. 10/351,310: filed Jan. 27, 2003.
U.S. Appl. No. 10/411,374: filed Apr. 11, 2003.
U.S. Appl. No. 10/606,863: filed Jun. 27, 2003.
Nakamura Koji
Usami Takuya
Yoshimura Satoshi
Denso Corporation
Martin David
Miller Patrick
Posz Law Group , PLC
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