Birotor permanent magnet motor and washing machine

Abstract

The invention provides a birotor permanent magnet motor and a washing machine with the same. The birotor permanent magnet motor comprises an inner rotor, a stator and an outer rotator which are sequentially arranged from inside to outside, and is characterized in that both the inner rotor and the outer rotor are permanent magnet rotors, and the stator comprises a magnetic modulation ring and a stator winding arranged on the magnetic modulation ring in a wound mode. The birotor permanent magnet motor is based on the magnetic field modulation principle and has a birotor structure, the outer rotor and the inner rotor can rotate according to certain proportional relation, and high-performance output of the motor under operating conditions of a low speed and a high speed can be met at the same time. When the birotor permanent magnet motor drives the washing machine to operate, not only are design requirements for low-speed large torque output and high-speed small torque output of the motor under the optimal operating state met, but also the structures of a belt pulley, a reduction gearbox and the like in a traditional washing machine are eliminated, transmission efficiency of the motor is improved, and meanwhile the defects of high noise, machine body vibration and the like of the traditional washing machine are overcome.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a double-rotor permanent magnet motor and a washing machine with the double-rotor permanent magnet motor. Background technique [0002] Washing machine is an indispensable household appliance in people's daily life. Its power consumption and vibration noise are important criteria to measure the quality of washing machine. At present, the commonly used single-cylinder fully automatic washing machines in China are basically divided into two types: top-loading washing machines and drum washing machines, and their basic working modes are mainly divided into two types: washing and drying. Usually, under washing conditions, the speed of the pulsator (wave wheel washing machine) or drum (drum washing machine) is low, 100-200r / min, while under dehydration conditions, the speed of the dehydration drum or drum is relatively high, usually 1000r / min . The traditional washing machine is driv...

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Problems solved by technology

[0005] The double-rotor permanent magnet motor has the advantages of small size and light weight. For example, the Chinese invention patent application number 200410075764.3 discloses a double-rotor permanent magnet motor. The two rotors share a stator. The stator is composed of a stator core and a stator winding. In the technology, both the inner and outer rotors are driven by the magnetic field generated by the stator, the speed of the inner and outer rotors is limited, and it is impossible to realize the function of using different speeds of the washing machine under the two working conditions of washing and dehydration at the same time

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