Title:
【発明の名称】フライバック電流減衰装置
Document Type and Number:
Japanese Patent JP2922294
Kind Code:
B2
Abstract:
An apparatus for dampening current in a coil has a switchable member which controls the current level in the coil and a flyback circuit that allows current in the coil to slowly dissipate when the switchable member changes from an "ON" to an "OFF" state. The flyback circuit has a high resistance when the switchable member changes from the "ON" to the "OFF" state so that the coil current is dampened as quickly as possible without creating a destructive voltage and low resistance when the switchable member is in the "ON" state to conserve energy. A signaling device creates a voltage signal as a function of current passing through the flyback circuit and a receiving device varies the resistance of the flyback circuit in response to the voltage signal. The apparatus is particularly suited for use in a motor control circuit.
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Inventors:
UIBURIN UEIN TEII
UIRUDO AASAA
UIRUDO AASAA
Application Number:
JP50310490A
Publication Date:
July 19, 1999
Filing Date:
January 20, 1990
Export Citation:
Assignee:
MITSUBISHI KYATAPIRAA FUOOKURIFUTO AMERIKA INC
International Classes:
H02H7/00; H01H47/00; H01H47/32; H02H9/04; (IPC1-7): H01H47/00; H02H7/00
Domestic Patent References:
| JP6448841U | ||||
| JP62502012A |
Attorney, Agent or Firm:
Kazuo Sato (3 others)