Title:
HEAT-GENERATION INHIBITING CIRCUIT FOR EXCITING COIL IN RELAY
Document Type and Number:
WIPO Patent Application WO/2011/078187
Kind Code:
A1
Abstract:
Provided is a heat-generation inhibiting circuit for a relay circuit, with which it is possible to reduce the amount of heat generated by the exciting coil during operation of the relay circuit. The disclosed heat-generation inhibiting circuit includes: a resistor (R1) provided between the exciting coil (Xc) and the ground; and a diode (D1) provided between the point (p1) and the point (p2). Immediately after the switch (SW1) has been turned on and before the relay contact (Xa) is closed, the exciting current (Ia) flows toward the ground via the diode (D1), and thus the voltage applied to the exciting coil becomes substantially equal to the power supply voltage (VB) and the relay contact can be closed reliably. When the relay contact (Xa) is closed, the exciting current (Ia) flows toward the ground via the resistor (R1), and thus the voltage applied to the exciting coil (Xc) is decreased and the amount of heat generated can be reduced.
Inventors:
OHSHIMA SHUNZOU
Application Number:
PCT/JP2010/073043
Publication Date:
June 30, 2011
Filing Date:
December 21, 2010
Export Citation:
Assignee:
YAZAKI CORP (JP)
OHSHIMA SHUNZOU
OHSHIMA SHUNZOU
International Classes:
H01H47/10; H01H47/32
Foreign References:
| JPS5374041U | 1978-06-21 | |||
| JPS3915330Y1 | ||||
| JP2002170466A | 2002-06-14 | |||
| JP2009289678A | 2009-12-10 |
Other References:
See also references of EP 2518751A4
Attorney, Agent or Firm:
HONDA Hironori et al. (JP)
Hironori Honda (JP)
Hironori Honda (JP)
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