AC generator control apparatus for vehicles
First Claim
1. A control apparatus of an AC generator for use in a vehicle, comprising:
- an AC generator having a field coil and operative to produce an output voltage;
a storage battery which is charged by a rectified output of the AC generator;
a voltage regulator for regulating the output voltage of the AC generator comprising a power transistor and a means of detecting the value of one of a voltage of said battery and an output voltage of the AC generator, said regulator being operative for intermittently turning on or off said power transistor in accordance with said detected value, and intermittently shutting on or off a field current which is supplied to said field coil; and
an excessive temperature controller comprising a triangular wave generator, a temperature detection circuit for generating an output voltage corresponding to a detected temperature and a comparator for comparing said output voltage corresponding to a temperature of the AC generator detected by said temperature detection circuit and a triangular wave voltage generated by said triangular wave generator and producing a comparison output;
said controller thereby controlling the on-time ratio of said power transistor so that it is changed in accordance with said comparison output, thereby causing the field current to flow intermittently.
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Accused Products
Abstract
A control apparatus of an AC generator for use in vehicles is disclosed which includes an AC generator having a field coil, a storage battery to be charged by a rectified output of the AC generator, a voltage regulator for regulating the output voltage of the AC generator and an excessive temperature controller that includes a triangular wave generator, a temperature detection circuit and a comparator. The controller controls the on-time ratio of a power transistor so that the field current flowing through the field coil is changed in accordance with output of the comparator which compares the output level of the temperature detection circuit and the triangular wave output of the triangular wave generator.
25 Citations
5 Claims
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1. A control apparatus of an AC generator for use in a vehicle, comprising:
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an AC generator having a field coil and operative to produce an output voltage; a storage battery which is charged by a rectified output of the AC generator; a voltage regulator for regulating the output voltage of the AC generator comprising a power transistor and a means of detecting the value of one of a voltage of said battery and an output voltage of the AC generator, said regulator being operative for intermittently turning on or off said power transistor in accordance with said detected value, and intermittently shutting on or off a field current which is supplied to said field coil; and an excessive temperature controller comprising a triangular wave generator, a temperature detection circuit for generating an output voltage corresponding to a detected temperature and a comparator for comparing said output voltage corresponding to a temperature of the AC generator detected by said temperature detection circuit and a triangular wave voltage generated by said triangular wave generator and producing a comparison output;
said controller thereby controlling the on-time ratio of said power transistor so that it is changed in accordance with said comparison output, thereby causing the field current to flow intermittently. - View Dependent Claims (2, 3, 4, 5)
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Specification