Three-phase asynchronous motor energy-saving device

Abstract

The invention relates to the technical field of three-phase asynchronous motors, in particular to a three-phase asynchronous motor energy-saving device which comprises a motor. Connecting ports of the motor are respectively connected with a three-phase power source, thyristors are arranged among the three-phase power source and the connecting ports of the motor, two optional power wires of the three-phase power source among the three-phase power source and the corresponding thyristors are connected with a power circuit and a phase-sequence detector respectively, a terminal of the power circuit is connected with a power port of a single chip microcomputer, a corresponding terminal of the phase-sequence detector is fixedly connected with a corresponding pin of the single chip microcomputer, and an operating signal interface and a trigger interface of each thyristor are fixedly connected with corresponding pins of the single chip microcomputer. When the three-phase asynchronous motor energy-saving device is used, the single chip microcomputer and the thyristors are used for adjusting terminal voltage of the motor, so that operating efficiency of the motor can be greatly improved, power factor of the motor can be greatly increased, and energy saving is achieved. The three-phase asynchronous motor energy-saving device has the advantages of simple structure, reasonableness in arrangement, low manufacture cost and the like.

Description

technical field

[0001] The invention relates to the technical field of a three-phase asynchronous motor, in particular to an energy-saving device for a three-phase asynchronous motor. Background technique

[0002] With the continuous innovation of science and technology, three-phase asynchronous motors are widely used in industrial and agricultural production activities. At present, the motors selected by the mechanical equipment commonly used in factories are matched according to the maximum power required by the machinery. However, in practical applications, the three-phase asynchronous motor is not used for a long time at full load, and it often works intermittently; as a result, the motor often runs under no-load or light-load conditions. For example: under the rated voltage, when the load rate of the motor is lower than 40%, the efficiency of the motor will drop rapidly, and the power factor will be very low, which will easily cause power waste. Therefore, how to impr...

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