Intelligent variable frequency speed control device and control method applicable to pulse load

Abstract

The invention provides an intelligent variable frequency speed control device applicable to a pulse load. The intelligent variable frequency speed control device is characterized in that the input ofthe intelligent variable frequency speed control device is a single-phase alternating current, and the output of the same is a three-phase alternating current with adjustable frequency and voltage; the hardware circuit of the intelligent variable frequency speed control device is composed of a main circuit and a control circuit. The invention also provides a control method for the intelligent variable frequency speed control device applicable to the pulse load; the control method is characterized by being implemented through controlling the hardware circuit via software algorithm; and the software algorithm is composed of a main program and a sub-program. The control device and control method provided by the invention have the beneficial effects as follows: the intelligent variable frequency speed control device provided by the invention can achieve continuous frequency conversion, smooth in change of rotation speed, good in stability, low in production cost and high in performance cost ratio; and the control method provided by the invention can be popularized and applied to household appliances including three-phase asynchronous motors, can reduce the production cost of the household appliances, and has the wide commercial prospect.

Description

technical field [0001] The invention belongs to the technical field of speed regulation and control of three-phase asynchronous motors, and in particular relates to an intelligent frequency conversion speed regulation device suitable for pulse loads and a control method thereof. Background technique [0002] With the development of science and technology, motors are used more and more widely, and the load forms used are also diversified. One of the most important forms is the pulse load form. For example, it is widely used in fitness equipment such as treadmills. With pulse load. [0003] The pulse-type load in the treadmill means that the load torque generated by the user when running or walking is a pulse-type load torque, which is mainly determined according to the frequency, duty cycle and load torque amplitude of the pulse-type load torque. describe. [0004] The operating characteristics of the motor under the pulse load are very different from those of the ordinary ...

AI Technical Summary

Problems solved by technology

[0006] Most of the general-purpose inverters on the market now adopt variable voltage and variable frequency control methods, and treat loads of different natures without distinction. high

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