Fan motor speed adjusting device, fan with same and fan motor

Abstract

The invention relates to a fan motor speed adjusting device, a fan with the fan motor speed adjusting device and a fan motor. The fan motor speed adjusting device comprises a switch control circuit, a speed adjusting circuit and a starting circuit. According to the fan motor speed adjusting device, firstly, the torque force of the motor is determined through the phase shifting effect of a starting capacitor in the starting circuit, and then the speed of the motor is adjusted through the speed adjusting circuit. The starting capacitor shares voltage with the motor and relieves impacting force of current on the motor, and therefore fluctuation is greatly reduced when the current torque force of the motor is stable. According to the fan motor speed adjusting device, the fan with the fan motor speed adjusting device and the fan motor, the advantages of an electronic speed adjusting method and the advantages of a capacitor speed adjusting method are combined, and on the premise that it is guaranteed that each speed adjusting gear can obtain maximum torque force generated by a motor winding, the motor is intelligently controlled through electronic speed adjustment; thus, impacting force of current on the motor is relieved, the current torque force of the motor can be stable, the service life of the motor is prolonged, and aging of all devices is relieved; the circuit structure is simple, and maintenance is convenient.

Description

technical field [0001] The invention relates to the field of motor speed regulation, in particular to a fan motor speed regulation device, a fan and a fan motor using the device. Background technique [0002] The motor of the fan is an AC motor, and its working principle is: the rotation is realized by the force of its energized coil in the magnetic field. The speed of the AC motor is different, and the air volume generated is also different. In order to make the air volume generated by the fan meet the requirements of people in different environments, it is necessary to regulate the speed of the fan motor. In the prior art, the speed of the motor of the fan is generally adjusted by the following methods: [0003] (1) Tap method: Since the motor with tap speed regulation has a main winding, an intermediate winding and an auxiliary winding; the tap method uses taps to reduce the winding voltage of the motor, thereby weakening the magnetic field strength to achieve speed regu...

AI Technical Summary

Problems solved by technology

Although the electronic governor has the characteristics of good adjustment effect and long life, its cost is relatively high

Although the electronic speed control method has been widely used, since the existing SCR is directly used to realize the speed control of the fan motor, the motor is directly impacted by the current after power-on, which shortens the service life of the motor; And the aging is accelerated; moreover, the current circuit structure using thyristor to realize speed regulation is complicated, which is not conducive to maintenance

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