CONTACTOR ENERGY SAVING TEST CIRCUIT - MORNSUN GUANGZHOU SCI & TECH

Title:

CONTACTOR ENERGY SAVING TEST CIRCUIT

Document Type and Number:

WIPO Patent Application WO/2019/153834

Kind Code:

A1

Abstract:

A contactor energy saving test circuit. A rectifier bridge (DB1) and a main power circuit form a contactor energy saving circuit, and a rectifier circuit (DB2), a sampling circuit, and a threshold comparison circuit are further added thereto. The threshold comparison circuit has a first reference (VTH1) and a second reference (VTH2). When a peak voltage of an output end signal (VT) of the sampling circuit is greater than the first reference (VTH1), the main power circuit is controlled to operate, and a contactor is attracted; when a voltage of the output end signal (VT) of the sampling circuit is lower than the second reference (VTH2), the main power circuit is controlled to be turned off, and the contactor is released. When an input voltage is an alternating current voltage, the peak voltage of the output end signal (VT) of the sampling circuit is equal to a voltage of the output end signal (VT) of the sampling circuit when the input voltage is a direct current voltage, such that the same voltage point triggers the contactor to operate, and an attraction voltage point and a release voltage point of a wide input voltage contactor are consistent regardless of whether the input voltage is an alternating current or a direct current input voltage. In addition, the circuit is easy to use. The invention ensures compatibility between alternating current and direct current contactor energy saving products and reduces production and inventory pressure of a manufacturer.

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Inventors:

SUN JUNXI (CN)

Application Number:

PCT/CN2018/116948

Publication Date:

August 15, 2019

Filing Date:

November 22, 2018

Export Citation:

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Assignee:

MORNSUN GUANGZHOU SCI & TECH (CN)
SHENZHEN NANYUN MICROELECTRONICS CO LTD (CN)

International Classes:

G01R31/04; G01R31/00; H01H47/00; H01H47/02

Foreign References:

CN108387810A	2018-08-10
CN207924060U	2018-09-28
CN107658181A	2018-02-02
CN106952781A	2017-07-14
CN205406395U	2016-07-27
KR20000017945A	2000-04-06