Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-03-14
2006-03-14
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S472000, C318S473000, C318S471000, C318S461000
Reexamination Certificate
active
07012400
ABSTRACT:
A control circuitry, electrically connected to a DC motor and a variable voltage source for modulating a rotational speed of the DC motor. The control circuitry includes a voltage reference component and a switching circuit. The voltage reference component is electrically connected with the variable voltage source and provides a predetermined reference voltage. The switching circuit is electrically connected with the DC motor and the voltage reference component. The switching circuit is “OFF” when a voltage given by the variable voltage source is lower than the predetermined reference voltage so that the DC motor operates with a first operation mode, and the switching circuit is “ON” when the voltage given by the variable voltage source is higher than the predetermined reference voltage so that the DC motor operates with a second operation mode.
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Delta Electronics , Inc.
Leykin Rita
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