Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Reexamination Certificate
2007-11-20
2007-11-20
Ponomarenko, Nicholas (Department: 2834)
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
C322S036000
Reexamination Certificate
active
11367315
ABSTRACT:
A control apparatus for a vehicular alternator can improve its reliability and reduce its cost by attenuating a field current of a rotor coil with a simple circuit. The apparatus includes an armature coil, a rectifier circuit, a rotor coil and a voltage control circuit. The rectifier circuit has an AC input terminal, a positive and a negative output terminal. The voltage control circuit controls a generation voltage to be substantially constant by interrupting a field current when a generation voltage exceeds a first predetermined voltage, while passing the field current when the generation voltage is equal to or lower than the first predetermined voltage. A circulation circuit comprising a diode and a current attenuation element serves to circulate the field current upon interruption thereof. A short-circuiting circuit short-circuits the current attenuation element. A short-circuit control circuit opens the short-circuiting circuit when the generation voltage exceeds a second predetermined voltage.
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Miyaji Wakaki
Nishimura Shinji
Mitsubishi Denki & Kabushiki Kaisha
Ponomarenko Nicholas
Sughrue & Mion, PLLC
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