Voltage adjusting switch

Abstract

The invention relates to a voltage adjusting switch, which comprises an adjusting switch, capacitors, resistors and a circuit board, wherein the capacitors and the resistors are welded on the circuit board, the circuit board is welded on the adjusting switch, the adjusting switch comprises an upper cover and a lower cover, the upper part of the upper cover is provided with an adjusting shaft, the inner plane of the upper cover is symmetrically provided with two movable contacts with double contacts in the circumferential direction, and the lower cover is provided with two groups of static contacts and conductive rings in the circumferential direction. The voltage adjusting switch has the advantages that when the voltage is adjusted, different resistors and capacitors are sequentially switched through the rotation of each baffle contact, the different line impedances are formed in a loop of a controlled motor, and then the working rotation speed of the controlled motor is changed; meanwhile, the power factor of the lines is improved; as a power supply is accessed into the loop in a two-path parallel way, and the loading current is shunted, the heat radiating conditions of the resistors and the capacitors are improved, the capacities of the resistors and the capacitors are reduced, and the size of the voltage adjusting switch is only one half of the size of the traditional speed adjusting switch.

Description

technical field [0001] The invention relates to a low-voltage electrical appliance, in particular to a voltage regulating switch. Background technique [0002] Small asynchronous motors are widely used in household appliances due to their simple structure, but it is difficult to adjust the speed of asynchronous motors. In some occasions where the starting torque is not high, step-down speed regulation can be used, such as electric fans, the step-down of traditional electric fans Reactors are used for voltage regulation, which have large volume and high energy consumption, and because the reactor is an inductive load, it will have an adverse effect on the power factor of the line. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the traditional technology and provide a voltage regulating switch with simple structure, which can not only regulate the voltage, but also improve the line power factor. [0004] In order t...

AI Technical Summary

Problems solved by technology

[0002] Small asynchronous motors are widely used in household appliances due to their simple structure, but it is difficult to adjust the speed of asynchronous motors. In some occasions where the starting torque is not high, step-down speed regulation can be used, such as electric fans, the step-down of traditional electric fans Reactor is used for voltage speed regulation, which has large volume and high energy consumption, and because the reactor is an inductive load, it will have an adverse effect on the power factor of the line

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