Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Reexamination Certificate
2007-04-24
2007-04-24
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
C318S432000, C318S431000, C318S433000, C318S132000, C318S400260, C318S254100, C318S434000
Reexamination Certificate
active
11328745
ABSTRACT:
A motor driving control device includes a motor, a switch unit that controls driving of the motor, a current detection resistor that outputs a detection voltage indicating a current of the motor, a comparator that compares the detection voltage with a target current value, an on signal generating unit that generates an on signal, a polarity of which is changed for each interval of predetermined time, and a control unit that has the comparator, a holding circuit receiving the on signal to change a circuit state. When a change in polarity of the on signal is detected, the holding circuit holds the circuit state such that the switch unit is turned on and a current is supplied to the motor. When the comparator detects that the current of the motor is increased to the target current value, the holding circuit holds the circuit state such that the switch unit is turned off.
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Alps Electric Co. ,Ltd.
Brinks Hofer Gilson & Lione
Masih Karen
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