Intelligent control device and method for three-phase alternating current

Abstract

The invention discloses an intelligent control device and method for three-phase alternating current. The device comprises a controller, a voltage sampling module, a current sampling module, an electric leakage protection module and a relay, wherein the voltage sampling module, the current sampling module and the electric leakage protection module are independently connected with the signal collection end of the controller; the input end of the relay is connected with the output end of the controller; the output end of the relay is connected with electrical equipment and a three-phase power supply in series; the voltage sampling module is used for collecting the voltage value of a power supply input end; the current sampling module is used for collecting the current value, which passes through a current transformer, of the power supply input end; the electric leakage protection module is used for collecting the electric leakage current signal of the power supply input end; and the controller controls the relay to be started and shut down according to the voltage value, the current value and the electric leakage current signal. The intelligent control device and method for the three-phase alternating current has the advantage of being high in safety.

Description

technical field [0001] The invention relates to the field of electric appliance control, in particular to a three-phase alternating current intelligent control device and method. Background technique [0002] At present, the control scheme of electrical equipment (such as washing machine) is mainly controlled by the high-current power switch and the main control switch, which are connected through the complicated connection of the power cord connector, and because the power switch and the main control switch are subjected to high current and strong voltage. control, the probability of damage is very high, which directly affects the life of the entire electrical equipment; moreover, the washing machine is mainly used in a humid and high-temperature environment, the main control switch is directly connected to the water pump motor, and the human body is directly exposed to the power switch and the main power switch with high current and high voltage. Once the electric leakage ...

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Problems solved by technology

[0002] At present, the control scheme of electrical equipment (such as washing machine) is mainly controlled by the high-current power switch and the main control switch, which are connected through the complicated connection of the power cord connector, and because the power switch and the main control switch are affected by the high current and strong voltage. control, the probability of damage is very high, and directly affects the life of the entire electrical equipment; moreover, the washing machine is mainly used in a humid and high-temperature environment, the main control switch is directly connected to the water pump motor, and the human body is directly exposed to the power switch and the main power switch with high current and high voltage. Once the electric leakage or short circuit occurs, it will bring great hidden danger to the safety of the human body; the cleaning machine is used frequently in the market, especially in the enterprise stores for the purpose of cleaning. Once the switch fails or is damaged, the electrical appliances cannot work normally. work, and even cause a fire

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