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Patent Searching and Data


Title:
DRIVE CIRCUIT FOR RELAY DEVICE AND RELAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/182115
Kind Code:
A1
Abstract:
A relay device and a drive circuit therefor, wherein the drive circuit comprises a relay switch circuit (10) and a temperature feedback circuit (20). The relay switch circuit has a relay drive circuit, and the temperature feedback circuit comprises a temperature collection module and a control circuit module. The temperature collection module collects temperature information of a relay coil and transmits same to the control circuit module. The control circuit module performs pulse width modulation according to the temperature information, and outputs an adjusted pulse width modulation signal to a gate of an MOS transistor. The drive circuit for the relay device is provided with the temperature feedback circuit to provide, for the relay switch circuit, closed-loop feedback under different temperature conditions, and uses the temperature collection module to detect the temperature of the relay coil, thereby outputting a pulse modulation signal of a corresponding duty cycle by means of the control circuit module to thus ensure that the relay coil will neither be burned nor lead to the contact of the relay device not being able to be kept closed due to an excessively small drive current.

Inventors:
JIA XIAOYU (CN)
MAO XINHUI (CN)
Application Number:
PCT/CN2020/078541
Publication Date:
September 17, 2020
Filing Date:
March 10, 2020
Export Citation:
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Assignee:
TYCO ELECTRONICS SHANGHAI CO LTD (CN)
International Classes:
H01H47/32
Foreign References:
CN206421993U2017-08-18
CN209822560U2019-12-20
JP2000113787A2000-04-21
Attorney, Agent or Firm:
TUO YING LAW OFFICES (SHANGHAI) (CN)
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