Generation control apparatus for vehicle generators

• US 4,336,487 A
• Filed: 06/04/1980
• Issued: 06/22/1982
• Est. Priority Date: 06/07/1979
• Status: Expired due to Term

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Tanaka, Shigeru, Matsuhashi, Hajime, Iwaki, Katsutaro, Banzai, Keiichiro
• Primary Examiner(s): HICKEY, ROBERT
• Application Number:
  US06/156,466
• Time in Patent Office: 748 Days
• Field of Search: 320/48, 320/64, 320/68, 322/28, 322/99
• US Class Current: 322/99
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle

Abstract

A generation control apparatus for a vehicle generator includes an energization circuit consisting of an energization path forming resistance element and switching means and provided between the output terminal of a rectifier circuit of the generator and the ground, and an oscillator circuit responsive to the voltage at the output terminal of the rectifier circuit to always oscillate and control the energization circuit, whereby an energization path is intermittently provided in response to the output signal of the oscillator circuit. If a generation fault condition is detected, current is caused to flow from a battery through a key switch, indicator means and the energization path forming resistor intermittently and the driver of the vehicle is alerted to the generation fault of the generator or a break in an excitation circuit by a flashing of the indicator means.

Claims

1. A generation control apparatus for vehicle generators comprising:

a vehicle A.C. generator having armature windings and an excitation winding;

a battery;

indicating means including a lamp or the like for indicating a status of said A.C. generator;

a key switch;

a first rectifier circuit connected to said armature windings, said first rectifier circuit having a first rectified output terminal connected to said battery;

a second rectifier circuit connected to said armature windings, said second rectifier circuit having a second rectified output terminal connected to said battery through said indicating means and said key switch;

a voltage regulating circuit connected to said second rectified output terminal through said excitation winding, for regulating a generated voltage of said vehicle A.C. generator at a predetermined value;

break detecting circuit means, connected to said second rectified output terminal in parallel with said voltage regulating circuit, for detecting a break of a line in the circuit of said excitation winding; and

an energization circuit for causing, responsive to an output of said break detecting circuit a current to intermittently flow said indicating means in such an on/off ratio that it flashes on and off at a human perceivable rate when the break of said line is detected by said break detecting circuit.

2. A generation control apparatus for vehicle generators according to claim 1, wherein said voltage regulating circuit comprises a switching circuit forming an excitation circuit, and said break detecting circuit means comprises an oscillator circuit disposed to oscillate in response to a voltage at said second rectified output terminal and an output transistor connected to the output terminal of said oscillator circuit.

3. A generation control apparatus for vehicle generators according to claim 2, wherein said break detecting circuit means further includes resistance means operatively connected to said oscillator circuit to detect the generation of power by said vehicle A.C. generator, and means for changing the on/off ratio of the output of said oscillator circuit, which is connected in series with said resistance means.

4. A generation control apparatus for vehicle generators comprising:

a vehicle A.C. generator having armature windings and an excitation winding;

a battery;

indicating means including a lamp or the like for indicating a status of said A.C. generator;

a key switch;

a first rectifier circuit, connected to said armature windings, having a first rectified output terminal connected to said battery;

a second rectifier circuit, connected to said armature windings, having a second rectified output terminal connected to said battery through said indicating means and said key switch;

a voltage regulating circuit connected to said second rectified output terminal through said excitation winding, for regulating a generated voltage of said vehicle A.C. generator at a predetermined value; and

an oscillator circuit arranged so as to be connected to said second rectifier circuit and further connected to said battery through said key switch and indicating means, for generating a signal whose on/off ratio varies in accordance with the generated voltage of said A.C. generator, the on/off ratio being larger when the generator is not generating than when the generator is operating normally, the oscillator circuit including switching means for making said indicating means flash on and off in accordance with the signal whose on/off ratio varies.

5. A generation control apparatus for vehicle generators according to claim 4, wherein the on/off ratio in the normal generating condition of the vehicle generator is about 1/100 and the on/off ratio in the ungenerating condition is 1/1.

6. A generation control apparatus for vehicle generators comprising:

a vehicle A.C. generator having armature windings and an excitation winding;

a battery;

indicating means including a lamp or the like for indicating a status of said A.C. generator;

a key switch;

a first rectifier circuit connected to said armature windings, said first rectifier circuit having a first rectified output terminal connected to said battery;

a second rectifier circuit connected to said armature windings, said second rectifier circuit having a second rectified output terminal connected to said battery through said indicating means and said key switch;

a voltage regulating circuit connected to said second rectified output terminal through said excitation winding, for regulating a generated voltage of said vehicle A.C. generator at a predetermined value; and

an oscillator circuit arranged so as to be connected to said second rectifier circuit and further connected to said battery through said key switch and indicating means, for (a) generating a signal having a constant on/off ratio making said indicating means flash on and off at a human perceivable rate in the ungenerating condition of said A.C. generator and (b) not flashing said indicating means when said A.C. generator is operating normally.

7. A generation control apparatus for vehicle generators according to claim 6, wherein said on/off ratio is approximately 1/10.