The torque of a motor is generated by the torque between the current and the magnetic field that interact with the motor internally. This is determined by the basic working principle of the motor, which mainly includes DC motor and AC motor(such as Medium and high voltage AC motor).
1. DC motor (DC motor):
Among DC motors, there are two main types: brushed DC motors and brushless DC motors.
Brushed DC motors: SIMO DC motors generate current by applying a DC voltage in the current path. When an electric current is passed through the coils of the motor (usually the stator), it creates a torque in the magnetic field that causes the motor to start rotating. Main series are Z series, Z4 series, Z2 series, ZTP, ZDH, ZKSL etc.
Brushless DC Motors: BLDC motors use a magnetic field generated by a permanent magnet (usually a magnet on a rotor) to interact with an electric current on the stator. By changing the direction and magnitude of the current at the right time, the motor can be rotated.
AC motor:
Among AC motors, there are mainly asynchronous motors (such as induction motors) and synchronous motors. China Simo Motor is focus on producing medium and high voltage AC motor.
2. Induction motor: In the induction motor, there is no permanent magnet on the rotor. When an alternating current is introduced to the stator, the rotating magnetic field it generates in the stator will induce the current to be generated in the rotor. Due to the relative motion, torque is generated, which causes the rotor to start rotating.
Synchronous motors: Synchronous motors operate synchronously with an external alternating power supply. The magnetic field between the stator and rotor is synchronized, causing torque to be generated, which propels the motor to rotate.
In these motors, the generation of the magnetic field and the flow of the current are interrelated, and the torque of the motor can be effectively controlled by controlling the direction and magnitude of the current. This is achieved through the use of equipment such as a motor controller or governor to ensure that the motor is able to provide the required output torque under various load conditions.
3. Stepper motor:
A stepper motor is a special type of motor that rotates by periodically applying a current to different phases in the drive. The stepper motor rotates at a fixed angle during each stepper action, and this angle is often referred to as the step angle.
Electromagnetic stepper motor: The rotation of the electromagnetic stepper motor is achieved by alternating the current of the electromagnetic coil on and off in different phases. When an electric current is passed through the coil, the coil creates a magnetic field that interacts with the magnetic poles fixed on the rotor, which pushes the rotor to rotate.
4. Permanent magnet stepper motor:
Permanent magnet stepper motors use permanent magnets fixed to the rotor. By changing the phase of the current, the motor can control the interaction between the permanent magnet and the coil, creating torque that will propel the motor to rotate.
The angle at which a stepper motor rotates in a single stepper action is usually small, but by accumulating multiple stepper actions, a large angle and precise position control can be achieved.
Overall, the torque generation of a motor is through the interaction between the current and the magnetic field, depending on the type of motor and how it works. The design and control system of the motor ensures that the right torque is available to meet the specific application requirements under different load conditions.
Medium and high voltage AC motor, welcome to know more.
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