Power supply device for electrical equipment of an automotive vehicle
First Claim
1. A power supply device for an electric device of an automobile having switching means for making and breaking an electric current supplied thereto, comprising:
- a battery coupled across said electric device of an automobile having said switching means to supply a DC voltage thereto;
voltage raising circuit means, having an input terminal coupled to a terminal of said battery through a starting switch in series circuit relationship with the voltage raising circuit means, for outputting a DC voltage higher than said DC voltage of said battery;
a diode coupled in parallel circuit relationship with a series circuit of said starting switch and said voltage raising circuit means, a forward direction of said diode coinciding with a forward direction of said voltage raising circuit means;
constant voltage source means having an input terminal coupled to an output of said voltage raising circuit means for outputting a constant DC voltage;
control circuit means coupled to an output of said constant voltage source means to be supplied with said constant DC voltage for outputting a signal controlling a making and breaking of said switching means of said electric device of an automobile.
1 Assignment
0 Petitions
Accused Products
Abstract
A power supply device for an engine starter of an automobile is disclosed. The device comprises a control circuit which controls the supply of DC current from a battery to the starter by making and breaking the electromagnetic switch of the starter. A series circuit of a starting switch and a DC-DC converter is coupled across a positive terminal of the battery and the input of a constant voltage source circuit. The output voltage of the DC-DC converter is 1.5 times as great as the input. Further, a diode is coupled in parallel with the series circuit of the starting switch and the DC-DC converter to supply the battery voltage when the starting switch is opened. The control circuit of the starter having input terminals coupled to the starting switch and an engine rotation sensor is supplied with the constant operating voltage from the constant voltage source circuit. The output of the control circuit operates a relay which in its turn operates the electromagnetic switch of the starter.
30 Citations
9 Claims
-
1. A power supply device for an electric device of an automobile having switching means for making and breaking an electric current supplied thereto, comprising:
-
a battery coupled across said electric device of an automobile having said switching means to supply a DC voltage thereto; voltage raising circuit means, having an input terminal coupled to a terminal of said battery through a starting switch in series circuit relationship with the voltage raising circuit means, for outputting a DC voltage higher than said DC voltage of said battery; a diode coupled in parallel circuit relationship with a series circuit of said starting switch and said voltage raising circuit means, a forward direction of said diode coinciding with a forward direction of said voltage raising circuit means; constant voltage source means having an input terminal coupled to an output of said voltage raising circuit means for outputting a constant DC voltage; control circuit means coupled to an output of said constant voltage source means to be supplied with said constant DC voltage for outputting a signal controlling a making and breaking of said switching means of said electric device of an automobile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A power supply device for an electric device of an automobile having a switching means for making and breaking an electric current supplied thereto, comprising:
-
a battery coupled across said electric device of an automobile having said switching means to supply a DC voltage thereto; voltage raising circuit means, having an input terminal coupled to a terminal of said battery through a starting switch in series circuit relationship with said voltage raising circuit means, for outputting a DC voltage higher than said DC voltage of said battery; a diode coupled in parallel circuit relationship with a series circuit of said starting switch and said voltage raising circuit means, a forward direction of said diode coinciding with a forward direction of said voltage raising circuit means; control circuit means, coupled to an output of said voltage raising circuit means to be supplied with said higher DC voltage, for outputting a signal controlling a making and breaking of said switching means of said electric device of an automobile.
-
Specification