Vehicle-mounted electrical generating system in which field current of electric generator supplying power to high-voltage system is derived from supply voltage of low-voltage system
First Claim
1. A vehicle-mounted electrical generating system comprising:
- a first voltage system which operates from a high supply voltage, a second voltage system which operates from a low supply voltage, an electric generator, having a rotor with a field winding wound thereon, said rotor being driven for rotation to generate electrical power that is supplied to said first voltage system at said high supply voltage, and a voltage control apparatus which effects successive on/off switching of a field current of said field winding, for controlling said supply voltage of said first voltage system to a predetermined value;
wherein said voltage control apparatus operates from electrical power at said low supply voltage of said second voltage system, and wherein said field current is derived from said low supply voltage of said second voltage system.
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Accused Products
Abstract
A vehicle-mounted electrical generating system has a first voltage system which operates from a high supply voltage and a second voltage system which operates from a low supply voltage that is substantially constant, and an electrical generator for supplying power to operate the first voltage system at a voltage determined by the level of field current of the generator, with the field current being derived from the low supply voltage of the second voltage system. The specifications of the field winding of the electrical generator can thereby be optimally established irrespective of the value of the high supply voltage.
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Citations
7 Claims
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1. A vehicle-mounted electrical generating system comprising:
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a first voltage system which operates from a high supply voltage, a second voltage system which operates from a low supply voltage, an electric generator, having a rotor with a field winding wound thereon, said rotor being driven for rotation to generate electrical power that is supplied to said first voltage system at said high supply voltage, and a voltage control apparatus which effects successive on/off switching of a field current of said field winding, for controlling said supply voltage of said first voltage system to a predetermined value;
wherein said voltage control apparatus operates from electrical power at said low supply voltage of said second voltage system, and wherein said field current is derived from said low supply voltage of said second voltage system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification