VOLTAGE REGULATOR, PARTICULARLY FOR USE WITH PERMANENT MAGNET VEHICLE-TYPE AC GENERATOR-RECTIFIER COMBINATION

• US 3,601,685 A
• Filed: 04/24/1969
• Issued: 08/24/1971
• Est. Priority Date: 05/02/1968
• Status: Expired due to Term

• Current Assignee: Edgar Kuhn
• Original Assignee: Edgar Kuhn
• Inventors: Kuhn, Edgar
• Primary Examiner(s): Rader, Oris L.
• Assistant Examiner(s): Huberfeld, H.
• Application Number:
  US04/819,018
• Time in Patent Office: 852 Days
• Field of Search: 322/28,91 320/71 317/31,33VR,33SC 307/271,275
• US Class Current: 322/28
• CPC Class Codes: H02J 7/1492 by means of controlling devices between the generator output and the battery
• 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

Controlled semiconductor switches, such as SCR'"'"''"'"'s are connected in parallel to, and with reverse polarity to the rectifier elements of the rectifier system connected to an AC permanent magnet vehicle-type generator, which may generate high voltages upon being driven at high speed and low load. A Zener diode senses overvoltage conditions, the Zener diode being connected to trigger a blocking oscillator to oscillate and to provide sharp triggering pulses to the SCR'"'"''"'"'s, the frequency of oscillations of the blocking oscillator being additional by determined by the output voltage so that the SCR'"'"''"'"'s will be conductive for a longer time, during any half cycle, as output voltage rises above the predetermined value.

Claims

1. A voltage regulator for use with permanent magnet AC generators connected to a rectifier system, having rectifier elements (13, 31, 32, 33, 35, 36, 37) and supplying DC supply buses (14, 15, 34, 38, 44, 45), comprising controlled rectifier switch means (19, 20, 46, 47, 48, 78, 79, 80) having their main current paths connected between the output of the generator and one of the DC supply buses;

and means (25, 55, 62, 74,

     73) sensing output voltage connected across said supply buses and supplying a signal when said output voltage exceeds a predetermined value, said means including an oscillator (68, 70,

     71) connected to the DC supply buses and triggered to oscillation upon appearance of said signal and having a frequency of oscillations dependent on the voltage between said DC supply buses said oscillator having a frequency vs. supply bus voltage characteristic which provides for increasing oscillation frequency as the voltage across said DC supply buses increases;

the control electrodes of said controlled rectifiers being connected to the output of said oscillator to control the conduction of said controlled rectifier switch means by applying pulses thereto, said controlled rectifier switch means short-circuiting the output of said generator upon conduction due to application of said pulses.

2. Voltage regulator according to claim 1, wherein the generator is a three-phase generator (28);

said rectifier system is a three-phase bridge-type rectifier (30) supplying said DC supply buses and the main current path of a controlled rectifier, each, is connected in parallel to three of the rectifier elements, one each being associated with an output winding of each of the three-phase generators.

3. Voltage regulator according to claim 1, wherein said sensing means is a reference diode (73) connected to sense the voltage between said DC buses, the reference diode being connected to said oscillator to trigger said oscillator to oscillation upon sensing of a voltage between said buses above a predetermined value.

4. Voltage regulator according to claim 1, wherein said oscillator is a blocking oscillator.