Electromagnetic wave noise entry inhibiting connector for vehicular AC generator control device

• US 6,700,357 B2
• Filed: 12/15/2000
• Issued: 03/02/2004
• Est. Priority Date: 12/16/1999
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Taniguchi, Makoto
• Primary Examiner(s): Mullins, Burton S.
• Assistant Examiner(s): Cuevas, Pedro J.
• Application Number:
  US09/736,251
• Publication Number:
  US 20020057026A1
• Time in Patent Office: 1,173 Days
• Field of Search: 322/44, 322/58-59, 322/69-70, 322/99, 439/620
• US Class Current: 322/99
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters
• CPC Class Codes: H01R 2201/26 for vehicles
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02P 9/02 Details

Abstract

Magnetic bodies for reducing electromagnetic wave noises are mounted to a battery voltage supplying terminal for supplying of an electric source power for the operation of circuits to an IC chip of a regulator or an internal electric source line for connection of the terminal to the regulator chip. The magnetic bodies are attached to an IG ON terminal for inputting into the regulator chip a voltage signal caused by opening and closing of an ignition switch or to an IG ON detection line for connection of the terminal to the regulator chip. A bypass capacitor is connected to a battery voltage detecting terminal for inputting a change of battery voltage into the regulator chip, or to an internal battery voltage detection line for connection of the terminal to a switching transistor control circuit unit.

Claims

1. A control device for a vehicular AC generator, comprising:

field current switching circuit unit having a switching transistor for performing switching control of current conducted to a field coil;

a switching transistor control circuit unit for performing intermittent control of the switching transistor based on a battery voltage and a predetermined target voltage;

an internal electric source circuit unit that uses electricity supplied from a battery to form an internal electric source voltage, the internal electric source voltage supplied to the switching transistor control circuit unit;

a casing containing at least one IC or the switching transistor control circuit unit that is mold-sealed by resin;

a battery voltage supplying terminal that supplies electricity to the internal electric source circuit unit from the battery via an internal electric source line; and

a magnetic body mounted to the internal electric source line or the battery voltage supplying terminal, wherein the battery voltage supplying terminal and the magnetic body are fixed to the casing, and the internal electric source line or the battery voltage supplying terminal is equipped with only the magnetic body.

3. The control device for a vehicular AC generator, according to claim 1, further comprising:

an IG ON detection terminal connected to an IG ON detection line, the IC detection terminal being connected to one end of an on-board ignition switch directly or through a lamp, said IG ON detection terminal detecting when an ignition switch is ON; and

a magnetic body mounted to the IG ON detection line or the IG ON detection terminal;

wherein the IG ON detection terminal and the magnetic body are fixed to the casing.

4. The control device for a vehicular AC generator, according to claim 1, further comprising:

an IC ON detection terminal connected to an IG ON detection line, said IG ON detection terminal being connected to one end of an on-board ignition switch directly or through a lamp, said IG ON detection terminal detecting when the ignition switch is ON; and

an inductance element mounted in series to the IG ON detection line;

wherein the IC ON detection terminal and the inductance element are fixed to the casing.

5. The control device for a vehicular AC generator, according to claim 1, further comprising:

a battery voltage detecting terminal connected to a high potential end of a battery for supplying battery voltage for input into the switching transistor control circuit unit through a battery voltage detection line; and

a high frequency bypass capacitor connecting between the battery voltage detection line or the battery voltage detecting terminal and a voltage potential source at a voltage potential equal to a negative potential of the battery;

wherein the battery voltage detecting terminal and the high frequency bypass capacitor are fixed to the casing.

6. The control device for a vehicular AC generator, according to claim 1, wherein the magnetic body is disposed closer to the internal electric source circuit unit than a connection between the battery voltage supplying terminal and the field coil mounted to the battery voltage supplying terminal or the internal electric source line.

7. The control device for a vehicular AC generator, according to claim 6, wherein the magnetic body is embedded in a connector portion of a resin provided integrally on the casing of a resin.

8. The control device for a vehicular AC generator according to claim 6, wherein the magnetic body is received in a magnetic body receiving groove, said magnetic body receiving groove formed in a concave manner on a bottom surface of a connector portion of a resin provided integrally on the casing.

9. The control device for a vehicular AC generator according to claim 8, wherein a peripheral wall of the connector portion facing the magnetic body receiving groove comprises a rib, said rib narrowing an opening of the magnetic body receiving groove, the peripheral wall and the rib have an elastic deforming characteristics in a direction allowing enlargement of an opening for insertion of the magnetic body into the magnetic body receiving groove.

10. The control device for a vehicular AC generator according to claim 6, wherein the magnetic body is formed from an electrically conductive magnetic material electrically insulated by a resin casing or a resin connector portion.

11. The control device for a vehicular AC generator according to claim 6, wherein the battery voltage supplying terminal or the IG ON detection terminal is flat-plate shaped, a cross section in a direction perpendicular to a lengthwise direction is substantially rectangular in shape, the magnetic body having a slot.

12. The control device for a vehicular AC generator according to claim 11, wherein:

the battery voltage supplying terminal has a ring-shaped tip end having a larger width than a base; and

the magnetic body mounted to the battery voltage supplying terminal has a slot through which the tip end extends.

13. The control device for a vehicular AC generator, according to claim 6, wherein the magnetic body has a plurality of through holes, each of the plurality of terminals extending separately through a respective one of said plurality of through holes.

2. A control device for a vehicular AC generator, comprising:

a field current switching circuit unit having a switching transistor that performs switching control of current conducted to a field coil;

a switching transistor control circuit unit that performs intermittent control of the switching transistor based on a battery voltage and a predetermined target voltage;

an internal electric source circuit unit that uses electricity supplied from the battery to form an internal electric source voltage, said internal electric source voltage being applied to the switching transistor control circuit unit;

a casing containing at least one IC or the switching transistor control circuit unit that is mold-sealed by resin;

a battery voltage supplying terminal for supplying electricity to the internal electric source circuit unit from the battery via an internal electric source line; and

an inductance element connected in series to the internal electric source line, wherein the battery voltage supplying terminal and the inductance element are fixed to the casing, and the internal electric source line is equipped with only the inductance element.