Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-10-09
2007-10-09
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S632000, C318S459000, C318S479000, C318S504000, C318S268000, C318S254100, C318S132000
Reexamination Certificate
active
10834756
ABSTRACT:
A control unit for driving a regulating transistor (2) of a fan arrangement, in which the regulating transistor (2) is connected in series with an electronically commutated fan (1), having control means (5, 6, R1, R2) for the analog driving of the regulating transistor (2) with a control signal (Ucontrol) in a manner dependent on a control input voltage (Uin). The control unit comprises compensation means (R3, R4) for influencing the control signal (Ucontrol) in a manner dependent on an AC voltage component (UAC) of an operating voltage (UB) of the fan arrangement, so that the AC voltage component (UAC) of the operating voltage (UB) is completely or partially compensated for in a voltage across the fan (1).
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Cohen Pontani Lieberman & Pavane LLP
Donovan Lincoln
Fujitsu Siemens Computers GmbH
Glass Erick
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