A two-speed asynchronous motor operated by a single-phase capacitor

Abstract

The invention provides a single-phase capacitance asynchronous motor operating at double speeds. The motor comprises a stator, a rotor, a casing, a rotating shaft, a front end cover, a rear end cover, bearings, fan blades, a fan cover and a junction box, wherein the stator comprises a set of high-rotating-speed windings and a set of low-rotating-speed windings; each set of windings comprises a main winding and an auxiliary winding and corresponds to one capacitor, power cords can be independently led out of two sets of windings, and the two sets of windings can be accessed to a power supply through switches for switch; the high-rotating-speed windings are dipolar windings, and the low-rotating-speed windings are quadrupole windings. According to the single-phase capacitance asynchronous motor operating at double speeds, the utilization rate of a stator material is high, the utilization rate of the motor to a material is increased, and the energy saving effect is realized.

Description

technical field [0001] The invention relates to a motor, in particular to a double-speed asynchronous motor operated by a single-phase capacitor. Background technique [0002] In the usual single-phase capacitor running motor, the motor stator includes a main winding and an auxiliary winding. The motor has a capacitor connected in series with the main winding or the auxiliary winding. When the motor is running, there is only one speed, and the speed is single. application occasions. [0003] In order to adapt to multi-speed applications, there is a single-phase motor with tap adjustment. The stator of this motor is equipped with a main winding and an auxiliary winding. The speed of the motor can be changed by changing the number of turns of the main and auxiliary windings. The angle between the winding and the capacitor of this kind of motor cannot reach the best state during the speed regulation process, which may easily cause low motor efficiency, high motor temperature o...

AI Technical Summary

Problems solved by technology

[0002] In the usual single-phase capacitor running motor, the motor stator includes a main winding and an auxiliary winding. The motor has a capacitor connected in series with the main winding or the auxiliary winding. When the motor is running, there is only one speed, and the speed is single. Applications

[0003] In order to adapt to multi-speed applications, there is a single-phase motor with tap adjustment. The stator of this motor is equipped with a main winding and an auxiliary winding. The speed of the motor can be changed by changing the number of turns of the main and auxiliary windings. The angle between the winding and the capacitor cannot reach the optimum state during the speed regulation process of this kind of motor, which may easily cause low motor efficiency, high motor temperature or inter-turn short circuit, etc., which cannot meet industrial requirements.

[0004] At present, there is also a method of step-down speed regulation to realize the speed change of a single-phase asynchronous motor. The input voltage of this type of motor is not directly connected to the power supply, but is connected to the output voltage of the electronic control. Increased the difficulty and complexity of circuit design

[0005] At present, there are also asynchronous motors with single-phase pole-changing and double-speed. The stator winding includes a high-speed main winding, a low-speed main winding and an auxiliary winding. The centrifugal switch is prone to failure when it is connected to the circuit or the low-speed main winding is connected to the circuit. When winding, there will be overlap between the three windings. The production and processing technology is relatively complicated, which increases the difficulty of circuit layout and is not conducive to mass production.

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