Device for setting the output voltage in a three-phase alternator

• US 6,163,138 A
• Filed: 05/17/1999
• Issued: 12/19/2000
• Est. Priority Date: 12/02/1996
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Jacob, Wolfgang, Kohl, Walter
• Primary Examiner(s): Ponomarenko, Nicholas
• Application Number:
  US09/308,470
• Time in Patent Office: 582 Days
• Field of Search: 322/24, 322/25, 322/27, 322/28, 322/59
• US Class Current: 322/28
• CPC Class Codes: H02J 7/2434 with pulse modulation
• 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 device for controlling the output voltage of a rotary current generator is disclosed, in which a generator without exciter diodes is used, and the exciter current is furnished by the rectifier bridge of the generator. The exciter current is regulated with the aid of a first integrated circuit. In addition, a smart power high-side switch, which is regulated by an integrated circuit (IS2), is located in the exciter current circuit.

Claims

1. A device for regulating the output voltage of a rotary current generator with stator windings and an exciter winding, with a voltage regulator which includes a control stage with a first integrated regulating circuit and a power stage with a regulating transistor, wherein the control stage influences the regulating transistor to influence the current through the exciter winding in such a way that the output voltage is kept at a predeterminable value, characterized in that the first integrated circuit (IS1) is connectable via a semiconductor switch to the terminal (B+) of the rotary current generator (10), and the semiconductor switch includes an integrated circuit (IS2), which triggers a smart power high-side switch (31).

2. The device of claim 1, characterized in that a rotary current generator without exciter diodes is used.

3. The device of claim 1, characterized in that the integrated circuit (IS1) has a monolith regulator (IC).

4. The device of claim 1, characterized in that the field effect transistor (31) is an MOS transistor wired as a switch.

5. The device of claim 1, characterized in that the integrated circuit IS1 and/or the integrated circuit IS2 is connected, for the sake of supplying information, to the terminals B+S, L, DF, D-, and V.