Special direct-current frequency converting control system for washing machine

Abstract

The invention relates to a special direct-current frequency converting control system for a washing machine. The system is connected between an upper computer and a direct-current motor of the washing machine and comprises a power supply converting module, an MCU (Micro-programmed Control Unit) control module and an RS232 serial port communication module, wherein the RS232 serial port communication module and the power supply converting module are both connected with the upper computer; the MCU control module is respectively connected with the power supply converting module and the RS232 serial port communication module; the system also comprises a Hall sensing module, an intelligent power driving module and a current detection and feedback module; and the Hall sensing module, the intelligent power driving module and the current detection and feedback module are respectively connected with the MCU control module, the power supply converting module and the direct-current motor. Compared with the prior art, the special direct-current frequency converting control system has the advantages of high response speed, high rotation speed adjusting precision, low energy consumption and the like.

Description

technical field [0001] The invention relates to a system in the field of DC frequency conversion control, in particular to a DC frequency conversion control system dedicated to washing machines. Background technique [0002] At present, washing machine motors mainly include induction motors, series motors, three-phase inverter motors, DC brushless motors and other types. Induction motors are generally used in low-end double-tub semi-automatic and fully automatic washing machines; series-excited motors are used in mid-range drum washing machines; three-phase frequency conversion motors and DC brushless motors are used in high-end drum washing machines. Most traditional washing machines use induction motors to realize the washing function of washing machines. Although AC asynchronous motors have low cost, simple control, and do not require additional controllers, there is a power factor lag during use, and the light load power factor is low. The disadvantage of poor performan...

AI Technical Summary

Problems solved by technology

Most traditional washing machines use induction motors to realize the washing function of washing machines. Although AC asynchronous motors have low cost, simple control, and do not require additional controllers, there is a power factor lag during use, and the light load power factor is low. The disadvantage of poor performance; when using a series motor, the structure is complex, the rotor current needs to be mechanically commutated through the commutator and the brush, and the sliding friction between the commutator and the brush is prone to mechanical wear and noise , sparks and electromagnetic interference reduce the reliability of the motor and shorten its life. Although the reliability and life have been greatly improved with the development of science and technology and the improvement of manufacturing technology, noise, sparks and electromagnetic interference still exist

Causes problems such as noise, heat generation, energy consumption, mechanical and motor loss during the washing process of the washing machine

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