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A wireless zero-crossing on-off switch and control method based on electromagnetic relay

A technology of electromagnetic relays and on-off switches, applied in relays, circuits, electrical components, etc., can solve the problems of power loss, affecting the life of switches, and generating arcs, etc., and achieve the effects of improving service life, saving household electricity, and saving wires

Active Publication Date: 2018-12-25
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In household electricity consumption, since the electric power on both sides of the switch is not zero at the moment of turning on and off, it will cause a certain amount of power loss and even arc, which greatly affects the life of the switch
At the same time, extremely complicated wiring is required when installing household appliances, which not only increases the amount of construction in the home decoration process and the difficulty of installing household appliances, but also increases the cost of installing household appliances with a large number of wires
In addition, the scattered switch arrangement also makes it more inconvenient for users to use
In summary, there is still no suitable home appliance installation solution that can overcome the above shortcomings

Method used

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  • A wireless zero-crossing on-off switch and control method based on electromagnetic relay
  • A wireless zero-crossing on-off switch and control method based on electromagnetic relay
  • A wireless zero-crossing on-off switch and control method based on electromagnetic relay

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Embodiment Construction

[0026] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0027] In this example, if figure 1 and 2 As shown, the 220V AC is stepped down and rectified to form a pulsating DC waveform. After the pulsating DC voltage is divided by a resistor, it is then filtered by a capacitor to filter out high-frequency components to form a voltage waveform at point B; when the voltage at point B is greater than 0.7V , the triode Q2 is turned on, forming a low level at the collector of the triode; when the voltage at point B is lower than 0.7V, the triode is cut off, and the collector of the triode passes through the pull-up resistor R4 to form a high level. In this way, a 100 Hz pulse waveform is formed at point C of the zero-crossing detection port of the single-chip microcomputer chip through repeated conduction and cut-off of the triode. Such as image 3 , The single-chip microcomputer chip detects the z...

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Abstract

The invention relates to an electromagnetic relay based wireless zero-crossing on-off switch and a control method. A transformer and a rectifying circuit are adopted to convert a single-phase alternating current into a pulsating direct current; the pulsating direct current is converted into a pulse direct current through a shaping circuit, and the pulse direct current is used as an external interrupt signal of a single chip microcomputer to realize zero-crossing point detection; after the single chip microcomputer receives a pulse interrupt signal, the relay is started for switching after a delay time based on the time difference of a pulse period and the relay responding time so as to realize the accurate zero-crossing point switching of the single-phase alternating current. According to the electromagnetic relay based wireless zero-crossing on-off switch and the control method provided by the invention, electric arc is not generated, so that the switch loss is lowered and an energy-saving effect is achieved; after the secondary output voltage of the transformer is rectified and filtered, the processed secondary output voltage can supply power to the single chip microcomputer; and meanwhile, a wireless control load switch is adopted, so that electric wires can be saved, and the mounting cost is saved.

Description

technical field [0001] The invention relates to an intelligent energy-saving electrical switch, in particular to a wireless zero-crossing on-off switch and a control method based on an electromagnetic relay. Background technique [0002] In household electricity consumption, since the electric power on both sides of the switch is not zero at the moment of turning on and off, it will cause a certain amount of power loss and even arc, which greatly affects the life of the switch. At the same time, extremely complicated wiring is required when installing household appliances, which not only increases the amount of construction in the home decoration process and the difficulty of installing household appliances, but also increases the cost of installing household appliances due to a large number of wires. In addition, the scattered switch arrangement also makes it inconvenient for users to use. In summary, there is still no suitable home appliance installation solution that can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H47/18
CPCH01H47/18
Inventor 黄宴委庄奋强谢雨晴
Owner FUZHOU UNIV
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