Title:
【発明の名称】電磁接触器用電子急速遮断回路
Document Type and Number:
Japanese Patent JP2913412
Kind Code:
B2
Abstract:
1. The invention is based on the object of providing a contactor with emergency shut-down which dissipates the switching off energy even when the supply is switched off and reduces the voltage surges occurring during switching off. 2. The invention is characterised in that a transient voltage suppression diode (7) is used to limit the voltage surges, which diode is connected in parallel with an electronic actuator (5) with which the current through the contactor coil (1) is pulsed, for the purpose of current regulation, and in that a feedback diode (8) is connected in the forward direction between the earth-side connection of the voltage suppression diode (7) and the input of the contactor coil (1), which diode ensures that the switch-off voltage surge is dissipated via a return current through the contactor coil (1) when the earth (10) is switched off. 3. The invention relates to electronic contactors with emergency shut-down having a freewheeling circuit which can be switched off and a semi-conductor component with a defined breakdown voltage for limiting the inductive voltage surges when the load circuit and freewheeling circuit are switched off.
Inventors:
HERUBERUTO MAIERU
ZORUTAN GIDEE
TOOMASU BAROFU
ZORUTAN GIDEE
TOOMASU BAROFU
Application Number:
JP5680790A
Publication Date:
June 28, 1999
Filing Date:
March 09, 1990
Export Citation:
Assignee:
AA EE GEE NIIDERUSHUPANUNGUSUTEHINIKU GMBH UNTO CO KG
International Classes:
H01H47/32; H02H9/04; H03K17/0814; H03K17/22; (IPC1-7): H01H47/32
Domestic Patent References:
| JP62140330A | ||||
| JP6226729A |
Attorney, Agent or Firm:
Osamu Nakahira