The motor, also known as the motor, is a device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electrical appliances or various machines. According to the working power supply, the motor includes alternating current (AC) motor and direct current (DC) motor. Among them, DC motors also include brushed DC motors that use mechanical commutation and BLDC motors that use electronic commutation. BLDC motors are divided into rotating motors and stepping motors, which have significant energy saving, low noise and excellent speed change performance. They are especially suitable for white goods applications such as refrigerators, air conditioners and washing machines. With the introduction of various national energy-saving policies, the home appliance industry has begun to widely import BLDC motors. To make these BLDC motors work reliably and efficiently, designers need to choose the appropriate motor drive or control scheme.
ON Semiconductor has extensive experience in the design, production and application of motor drivers, providing a wide range of motor drive and control solutions. This article will introduce the typical application of the motor driver / controller in white goods, and the high energy efficiency and high reliability BLDC motor driver / controller solution of ON Semiconductor.
Application of motor driver / controller in white goods
According to statistics, the number of motors used in refrigerators is the largest, reaching about five; two motors are also used in air conditioning, drying and washing machines. Applications such as DC fan motors for refrigerators, automatic ice machines and dampers, throttle valves and drain / water supply pumps for drying and washing machines usually use a single-chip integrated motor driver, while DC fans for air conditioners are outdoor / indoor , DC motors for drying and washing machines will use the motor controller. The suitable voltage and current ranges of these motor drivers / controllers are also different, as shown in Figure 1.
Figure 1: Application of motor driver / controller in white goods
The following will discuss the requirements of different sub-applications of these three types of key white goods and the corresponding solutions of ON Semiconductor.
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