GENERATOR VOLTAGE REGULATOR

• US 3,609,514 A
• Filed: 07/27/1970
• Issued: 09/28/1971
• Est. Priority Date: 07/27/1970
• Status: Expired due to Term

• Current Assignee: Robert J. Nowakowski, Robert W. Campbell, Ronald A. Martin
• Original Assignee: Robert J. Nowakowski, Robert W. Campbell, Ronald A. Martin
• Inventors: Nowakowski, Robert J., Martin, Ronald A., Campbell, Robert W.
• Primary Examiner(s): Dobeck, Benjamin
• Assistant Examiner(s): Huberfeld, H.
• Application Number:
  US05/058,363
• Time in Patent Office: 428 Days
• Field of Search: 322/28,59,63,64,73 320/65,66
• US Class Current: 322/28
• CPC Class Codes: H02J 7/16 Regulation of the charging current or voltage by variation of field
• CPC Class Codes: H02J 7/2437 using thyristors or triacs as final control devices
• CPC Class Codes: H02P 9/305 controlling voltage H02P9/302 takes precedence
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

A voltage regulating system which is capable of controlling the output voltage of an alternating current generator which has a permanent magnet field, a main field winding and a reverse field winding. The voltage regulator utilizes thyristors or controlled rectifiers connected in a full-wave circuit with a plurality of diodes. The main field of the generator is connected across the direct current output terminals of the bridge circuit and its energization is controlled in accordance with the conduction of the controlled rectifiers. The reverse field winding of the generator is connected in series with another controlled rectifier having its gate-cathode circuit connected across the anode-cathode circuit of one of the controlled rectifiers of the bridge circuit. With this arrangement the controlled rectifier connected with the reverse field winding is biased conductive when the bridge controlled rectifiers are biased nonconductive and this controlled rectifier is biased nonconductive when the bridge controlled rectifiers are biased conductive. The conduction of the bridge controlled rectifiers is controlled by a circuit which senses the output voltage of the generator.

Claims

1. An electrical system comprising, an alternating current generator having first and second field windings and a polyphase output winding, a field energizing bridgE comprised of a plurality of controlled rectifiers and a plurality of diodes, said bridge having AC input terminals connected between a respective diode and controlled rectifier and with said output winding of said generator, means connecting said first field winding of said generator, means connecting said first field winding across the direct current output terminals of said field energizing bridge, voltage sensing means connected with said generator output winding for sensing the output voltage of said generator, means coupled to said voltage sensing means and to the gate electrodes of said controlled rectifiers for applying gating signals to said gate electrodes as a function of the output voltage of said generator, a controlled rectifier for controlling the application of current to said second field winding having its gate and cathode connected across the anode and cathode of one of said bridge controlled rectifiers, said controlled rectifier being gated conductive when said bridge controlled rectifiers are nonconductive and biased nonconductive when said bridge controlled rectifiers are conductive, and means connecting said second field winding in series with the anode-cathode circuit of said controlled rectifier in a circuit connected between one direct current output terminal of said field energizing bridge and one AC input terminal of said field energizing bridge whereby said first and second field windings of said generator are alternatively energized as a function of the output voltage of said generator and operate to maintain a substantially constant output voltage from said generator.

2. An electrical system comprising, an alternating current generator having an output winding, a main field winding, and a reverse field winding, a power bridge rectifier circuit having AC input terminals connected with said output winding and direct current output terminals connected with an electrical load, a field energizing bridge circuit comprised of a plurality of controlled rectifiers and a plurality of diodes, said field energizing bridge circuit having AC input terminals connected between a respective diode and controlled rectifier and with said output winding of each generator, means connecting said main field winding across the direct current output terminals of said field energizing bridge, a voltage divider connected across said power bridge rectifier to sense the output voltage of said power bridge rectifier, transistor means having a collector and an emitter, means coupling the base of said transistor means with said voltage, divider whereby the conduction of said transistor means is controlled as a function of the output voltage of said power bridge rectifier, a circuit connected between the gates of said controlled rectifiers of said field energizing bridge and one direct current output terminal of said bridge rectifier having a junction, means connecting the collector and emitter of said transistor means between said junction and the other side of said power bridge rectifier whereby gating signals are applied to the gates of said bridge circuit controlled rectifiers when said transistor means is biased nonconductive and signals are bypassed from the gate electrodes of said controlled, rectifiers when said transistor means is biased conductive, a controlled rectifier for controlling circuit connected in series with said reverse field winding and across one direct current output terminal and one AC input terminal of said field energizing bridge, and means connecting the gate and cathode of said controlled rectifier across the anode and cathode of one controlled rectifier of said field energizing bridge whereby said main and reverse field windings are alternately energized to maintain a substantially constant output voltage from said generator.

3. The electrical system according to claim 2 where at least one diode is connected in series between said junction and the gates of said bridge controlled rectifiers to develop a voltage which is operative tO prevent the gating of said bridge controlled rectifiers by the voltage across said transistor means when said transistor means is biased fully conductive.

4. The electrical system according to claim 2 where the generator has said main and reverse field windings and permanent magnet field.