motor is an important component of washing machine products. With the performance optimization and intelligence improvement of washing machine products, the matching motors and transmission methods have also quietly changed, especially in line with our country's overall policy-oriented requirements of high efficiency and low carbon. Combined, energy-saving and environmentally friendly products have taken the lead in the market.
The motors of ordinary fully automatic washing machines and drum washing machines are different; for ordinary washing machines, the motors are generally single-phase capacitor started asynchronous motors . There are many types of motors used in drum washing machines, such as variable frequency motors, which are very widely used. a choice.
For motor transmission, most of the initial washing machines used belt drive , while most of the later products used direct drive method and were scientifically combined with variable frequency motors.
Regarding the relationship between belt drive and motor performance, we have mentioned in the previous article that if the washing machine uses a series motor, it will cause the motor to heat up and burn out during no-load operation. This problem does exist in old-fashioned washing machines. , that is, the washing machine is not allowed to run without load; with the improvement of washing machine products, similar problems can be better solved through the selection of control, transmission mode and motor.
Low-end double-tub semi-automatic and fully-automatic washing machines generally use induction motors ; series motors are used in mid-range drum washing machines; variable frequency motors and DD brushless DC motors are used in high-end drum washing machines.
drum washing machines all use AC and DC motors . The speed adjustment method adopts variable voltage speed regulation or changing the number of winding pole pairs. Among them, the two-speed motor is cheaper and can only have washing and a single fixed dehydration speed; frequency conversion Speed-adjustable motors are more expensive and can select a wide range of dehydration speeds, and can also be used for different fabrics.
is directly driven, that is, between the motor and the driven workpiece, is directly used to rigidly connect , without the need for intermediate links such as screws, gears, reducers , etc., and the backlash and backlash existing in the transmission screw transmission system are avoided to the greatest extent. Problems with inertia, friction and insufficient rigidity. Due to the use of direct drive technology, the error caused by the intermediate mechanical transmission system is greatly reduced.
