Voltage regulator and method
First Claim
1. A voltage regulator for charging a battery having a positive terminal and a negative terminal and a voltage potential between said terminals, the regulator being adapted to be coupled to a generator being adapted to supply charging current from said stator winding in response to an excitation current being fed to said field winding, the votlage regulator comprising:
- means for providing a signal indicting that charging current is being provided from said stator winding;
means for receiving said signal and for providing an error voltage and for providing a reference voltage responsive thereto;
means having a first transistor for controlling an excitation current flow through the field winding;
means having a second transistor responsive to changes in the level of said error voltage and said signal for biasing said first transistor;
feedback means coupled to said second transistor for sensing changes ni the level of said error voltage and for changing the level of said reference voltage in accordance with the sensed changes; and
means reponsive to said feedback means and the level of said refernce voltage for changing the bias of said second transistor.
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Accused Products
Abstract
A voltage regulator for regulation of automotive electrical generators and battery system. A generator is coupled through a rectifier to a voltage regulator and a battery. The regulator is activated by a low voltage level stator signal from the generator. The activation voltage level is set to an improved initial activation time when the generator starts to charge the battery while maintaining tolerance to rectifier leakage current. A feedback is included in the regulator to lower power dissipation during regulation and protect the regulator during a voltage surge.
27 Citations
10 Claims
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1. A voltage regulator for charging a battery having a positive terminal and a negative terminal and a voltage potential between said terminals, the regulator being adapted to be coupled to a generator being adapted to supply charging current from said stator winding in response to an excitation current being fed to said field winding, the votlage regulator comprising:
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means for providing a signal indicting that charging current is being provided from said stator winding; means for receiving said signal and for providing an error voltage and for providing a reference voltage responsive thereto; means having a first transistor for controlling an excitation current flow through the field winding; means having a second transistor responsive to changes in the level of said error voltage and said signal for biasing said first transistor; feedback means coupled to said second transistor for sensing changes ni the level of said error voltage and for changing the level of said reference voltage in accordance with the sensed changes; and means reponsive to said feedback means and the level of said refernce voltage for changing the bias of said second transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification