1. Different working principles
A DC motor is an electric motor powered by a DC power supply. Its working principle is based on Faraday's law of electromagnetic induction and Ampere's law. When a DC power supply is passed, the current passes through the stator coil and the rotor coil of the motor. In the stator coil, the current generates a magnetic field, and in the rotor coil, due to the interaction between the current and the magnetic field, a torque is generated, causing the motor to rotate.
An AC motor is an electric motor powered by an AC power supply. Its working principle is based on Faraday's law of electromagnetic induction and the Hall effect. When the AC power supply passes through the stator coil of the motor, it generates an alternating magnetic field, which interacts with the magnetic field in the rotor coil, thereby generating a rotational torque, causing the motor to rotate.
2. Different structures
DC motors are usually composed of stators, rotors, brushes, shafts and housings. The stator and rotor contain coils and magnets respectively. In the motor, the stator coil is fixed to the motor housing, while the rotor coil is mounted on the motor shaft. The brush is used to connect the stator coil and the external power supply to convert electrical energy into mechanical energy.
AC motors have a relatively simple structure and are usually composed of stators, rotors, capacitors, shafts and housings. The stator and rotor also contain coils and magnets respectively. In AC motors, the rotor coil is usually made of aluminum and connected to the stator coil through a capacitor.
3. Different applications
DC motors are widely used in various industrial and household equipment, such as fans, printers, power tools, etc. They have the characteristics of high efficiency, high torque, easy to control speed, etc., so they are irreplaceable in many occasions.
AC motors are mainly used in household appliances, industrial equipment and other fields, such as electric fans, washing machines, compressors, etc. Because AC motors have the characteristics of high efficiency and low noise, they are widely used in household appliances.
As we all know, motors are the core components of household appliances. From refrigerators to shavers, they all need motors to drive them. Without motors, household appliances become decorations. It is an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. Motors can be divided into different types according to different classification types. DC motors and AC motors are two common classification types. So, what is the difference between DC motors and AC motors?
In fact, the most fundamental difference between DC motors and AC motors is the type of power supply. One requires DC power and the other requires AC power. What follows is the difference in working principle and structural control.
