Semi-conductor voltage regulator, particularly for automotive use
First Claim
1. Semi-conductor voltage regulator for connection to a dynamo electric generator (1) and adapted to control current flow through the field winding (4) of the generator (1) as a function of the output voltage of the generator, comprisinga main semi-conductor controlled switch (7) having its output connected to controlled current flow through the field winding (4) of the dynamo electric generator (1);
- a main voltage sensing means (10, 11,
12) including a main voltage divider (10,
12) connected to sense average output voltage of the dynamo electric generator and controlling conduction of said main semi-conductor switch (7);
an auxiliary voltage sensing means (17, 18,
19) connected to the output voltage of the dynamo electric generator (1) and sensing minimum instantaneous voltage levels thereof;
and an auxiliary semi-conductor controlled switch (14,
16) having its output connected to the main voltage divider (10,
12) and modifying the voltage division ratio thereof, said auxiliary semi-conductor controlled switch (13,
16) having its input controlled by said auxiliary sensing means.
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Accused Products
Abstract
To compensate for voltage drop upon high loading of an automotive type alternator, the output of which is rectified, a main semi-conductor control switch is connected to control the output voltage of the alternator by selectively connecting, and disconnecting current flow through the field winding of the alternator. A voltage divider is used to obtain a control voltage for the main semi-conductor switch. An auxiliary sensing circuit is connected to sense waviness, or ripple content of the output voltage and, if it exceeds a pre-determined limit, controls an auxiliary semi-conductor switch which is connected to the voltage divider to modify the voltage division ratio thereof and thereby change the regulating effect of the main semi-conductor switch.
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Citations
7 Claims
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1. Semi-conductor voltage regulator for connection to a dynamo electric generator (1) and adapted to control current flow through the field winding (4) of the generator (1) as a function of the output voltage of the generator, comprising
a main semi-conductor controlled switch (7) having its output connected to controlled current flow through the field winding (4) of the dynamo electric generator (1); -
a main voltage sensing means (10, 11,
12) including a main voltage divider (10,
12) connected to sense average output voltage of the dynamo electric generator and controlling conduction of said main semi-conductor switch (7);an auxiliary voltage sensing means (17, 18,
19) connected to the output voltage of the dynamo electric generator (1) and sensing minimum instantaneous voltage levels thereof;and an auxiliary semi-conductor controlled switch (14,
16) having its output connected to the main voltage divider (10,
12) and modifying the voltage division ratio thereof, said auxiliary semi-conductor controlled switch (13,
16) having its input controlled by said auxiliary sensing means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification