Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Plural – diverse motor controls for different motors
Reexamination Certificate
2006-06-26
2010-02-02
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Plural, diverse motor controls for different motors
C318S066000, C318S049000
Reexamination Certificate
active
07656107
ABSTRACT:
The invention relates to a control circuit for an arrangement having at least two DC motors (10, 12), which can be connected in parallel to a DC voltage system (16, 18), in particular a circuit for controlling at least two motors of a motor vehicle fan. In this case, the DC motors (10, 12) can be connected to the DC voltage system (16, 18), on the one hand, during starting, jointly via in each case one series resistor (22, 24) having a low resistance value and a common semiconductor switching element (26) and, on the other hand, during operation, via separate semiconductor switching elements (32, 34), the series circuit comprising the separate series resistors (22, 24) and the common semiconductor switching element (26) being arranged in parallel with the separate semiconductor switching elements (30, 32) for controlling the motors during operation.
REFERENCES:
patent: 1768760 (1930-07-01), Harvey
patent: 5586867 (1996-12-01), Mehlos
patent: 5723958 (1998-03-01), Boll et al.
patent: 6891342 (2005-05-01), Nakamura et al.
patent: 43 29 919 (1995-03-01), None
patent: 103 36 512 (2004-03-01), None
patent: 103 44 301 (2005-04-01), None
Masih Karen
Robert & Bosch GmbH
Striker Michael J.
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