Control device for vehicle AC generator
First Claim
1. A control device for a vehicle AC generator comprising a stator coil, a field coil, a rectifying circuit connected to the stator coil, and a voltage control circuit that performs shutdown of and energization with a field current flowing through the field coil in accordance with an output voltage of the rectifying circuit and that controls the output voltage of the rectifying circuit to a substantially constant level, characterized in thatthe voltage control circuit hasa first active switch having its one end connected to one end of the field coil and having its other end connected to a negative output terminal of the rectifying circuit,a second active switch having its one end connected to a positive output terminal of the rectifying circuit and having its other end connected to the other end of the field coil,a first passive switch connected between the negative output terminal of the rectifying circuit and a connecting point of the second active switch and the field coil, anda second passive switch connected between the positive output terminal of the rectifying circuit and a connecting point of the first active switch and the field coil, andthe first and second active switches are on/off-controlled independently of each other.
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Accused Products
Abstract
A highly reliable control device for an AC generator without using a transistor and diode having high withstand voltage is provided.
A control device for a vehicle AC generator including a voltage control circuit that controls an output voltage of a rectifying circuit connected to a stator coil to a substantially constant level has a first active switch having its one end connected to one end of the field coil and having its other end connected a negative output terminal of the rectifying circuit, a second active switch having its one end connected to a positive output terminal of the rectifying circuit and having its other end connected to the other end of the field coil, a first passive switch connected between the negative output terminal of the rectifying circuit and a connecting point of the second active switch and the field coil, and a second passive switch connected between the positive output terminal of the rectifying circuit and a connecting point of the first active switch and the field coil, and the first and second active switches are on/off-controlled independently of each other.
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Citations
5 Claims
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1. A control device for a vehicle AC generator comprising a stator coil, a field coil, a rectifying circuit connected to the stator coil, and a voltage control circuit that performs shutdown of and energization with a field current flowing through the field coil in accordance with an output voltage of the rectifying circuit and that controls the output voltage of the rectifying circuit to a substantially constant level, characterized in that
the voltage control circuit has a first active switch having its one end connected to one end of the field coil and having its other end connected to a negative output terminal of the rectifying circuit, a second active switch having its one end connected to a positive output terminal of the rectifying circuit and having its other end connected to the other end of the field coil, a first passive switch connected between the negative output terminal of the rectifying circuit and a connecting point of the second active switch and the field coil, and a second passive switch connected between the positive output terminal of the rectifying circuit and a connecting point of the first active switch and the field coil, and the first and second active switches are on/off-controlled independently of each other.
Specification