Title:
PROTECTIVE DEVICE FOR THREE-PHASE AC DYNAMO USED FOR CAR
Document Type and Number:
Japanese Patent JPH06351171
Kind Code:
A
Abstract:
PURPOSE: To protect a three-phase alternator against load damp phenomenon and overvoltage caused by a part mounted on an automobile by connecting the first terminal of an avalanche diode with a common terminal through a diode conducting forward when the avalanche diode is in avalanche mode. CONSTITUTION: A transitory overvoltage generated from several electronic apparatus in a vehicle is removed by connecting an avalanche diode 15 in parallel between terminals S<+> and S<-> . In practice, diodes D1 through D6 are biased such that a positive overvoltage generated at the terminals S<+> is not removed by Shockley diodes 11 through 13. Such an overvoltage brings the avalanche diode 15 into conducting state and a protective function for the avalanche diode 15 is provided by clipping the electric elements of the vehicle and a regulator.
Inventors:
ROBEERU PEZAANI
DONI BERUTEIO
DONI BERUTEIO
Application Number:
JP9290694A
Publication Date:
December 22, 1994
Filing Date:
April 07, 1994
Export Citation:
Assignee:
SGS THOMSON MICROELECTRONICS
International Classes:
H02J7/14; H01L27/08; H02H7/06; H02H9/04; H02P9/14; (IPC1-7): H02J7/14; H02P9/14
Attorney, Agent or Firm:
Keiichi Yamamoto