Automotive dynamo controller

• US 6,781,350 B1
• Filed: 08/07/2001
• Issued: 08/24/2004
• Est. Priority Date: 09/10/1999
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Watanabe, Hirofumi, Kouwa, Tatsuki, Iwatani, Shiro
• Primary Examiner(s): Dougherty, Thomas M.
• Assistant Examiner(s): Cuevas, Pedro J
• Application Number:
  US09/831,040
• Time in Patent Office: 1,113 Days
• Field of Search: 322/17, 322/27
• US Class Current: 322/27
• CPC Class Codes: H01L 2224/49171 Fan-out arrangements
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/243 with on/off action
• CPC Class Codes: H02P 9/107 for limiting effects of overloads
• CPC Class Codes: H02P 9/305 controlling voltage H02P9/302 takes precedence

Abstract

A controller for an A.C. generator for a vehicle, includes: batteries each of which is charged with electric charges on the basis of an output of generation of electrical energy of an A.C. generator having a field coil; voltage regulating means for regulating a current, which is caused to flow through the field coil, on the basis of the detection result of a voltage developed across the terminals the batteries due to an output voltage of the A.C. generator into an fixed output value of the generation of electrical energy of the A.C. generator; and field current restricting means for detecting a current which is caused to flow through the field coil by means of a field current detecting resistor to restrict the current to a predetermined value in correspondence with the detection result, wherein the field current detecting resistor is formed as a thick film printed resistor, and wherein each of the means other than the thick film printed resistor is formed by an electronic circuit are in the form of an integrated circuit.

Claims

1. A controller for an A.C. generator for a vehicle, comprising:

batteries each of which is charged with electric charges on the basis of an output of generation of electrical energy of an A.C. generator having a field coil;

voltage regulating means for regulating a current, which is caused to flow through said field coil, on the basis of the detection result of a voltage developed across the terminals of said batteries due to an output voltage of said A.C. generator into a fixed output value of the generation of electrical energy of said A.C. generator; and

field current restricting means for detecting a current which is caused to flow through said field coil by means of a field current detecting resistor to restrict the current to a predetermined value in correspondence to the detection result,

wherein said field current detecting resistor is a thick film printed resistor, and

wherein each of said means other than said thick film printed resistor is an electronic circuit and the electronic circuits are configured in the form of an integrated circuit.

2. A controller for an A.C. generator for a vehicle according to claim 1, wherein said thick film printed resistor and said integrated circuits are formed on an insulating board.

3. A controller for an A.C. generator for a vehicle according to claim 1, wherein a resistor body constituting said thick film printed resistor is trimmed to adjust the resistance value thereof and to adjust the field current detection value.

4. A controller for an A.C. generator for a vehicle according to claim 1, further comprising a failure alarm means for detecting a failure of said A.C. generator to give an alarm, wherein the failure alarm means is an integrated circuit.