An electric motor (commonly referred to as "motor") refers to an electromagnetic device that realizes electric energy conversion according to the law of electromagnetic induction. It is represented by the letter M in the circuit, and its main function is to generate driving torque, which can be used as a power source for the electric equipment. The motor consists essentially of an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor and other accessories. Under the action of the rotating magnetic field of the stator winding, it has a current passing through the armature squirrel cage aluminum frame and is rotated by the action of the magnetic field. Stator (stationary part) Stator core: A part of the motor's magnetic circuit and on which the stator windings are placed. Stator winding: It is the circuit part of the motor, which is connected to three-phase alternating current to generate a rotating magnetic field. Base: Fix the stator core and front and rear end caps to support the rotor, and play the role of protection and heat dissipation. Rotor (rotating part) Rotor core: As part of the magnetic circuit of the motor and placing the rotor windings in the core slot. Rotor winding: cutting the rotating magnetic field of the stator generates induced electromotive force and current, and forms electromagnetic torque to rotate the motor. DC motor A direct current motor is an electric motor that converts direct current electrical energy into mechanical energy. Physical model diagram of DC motor The physical model diagram of the DC motor in the above figure, the fixed part has a magnet, here called the main magnetic pole; the fixed part also has a brush. The rotating portion has an annular core and windings wound around the toroidal core (the two small circles are provided for convenience of indicating the direction of the conductor potential or current at the position). Stepper motor A stepping motor is an open-loop control element stepping motor that converts an electrical pulse signal into an angular displacement or a linear displacement. In the case of non-overload, the speed and stop position of the motor depend only on the frequency of the pulse signal and the number of pulses, and are not affected by the load change. When the stepper driver receives a pulse signal, it drives the stepper motor to press The set direction is rotated by a fixed angle. The angular displacement can be controlled by controlling the number of pulses to achieve the purpose of accurate positioning. At the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, thereby achieving the purpose of speed regulation. Stepper motor working principle: The stator winding produces a vector magnetic field as current flows through the stator windings. The magnetic field causes the rotor to rotate an angle such that the pair of magnetic fields in the rotor coincide with the direction of the magnetic field of the stator. When the vector magnetic field of the stator is rotated by an angle, the rotor also turns an angle with the magnetic field. Each time an electrical pulse is input, the motor rotates an angle further. The angular displacement of the output is proportional to the number of pulses input, and the rotational speed is proportional to the pulse frequency. Changing the order in which the windings are energized, the motor will reverse. Therefore, the number of control pulses, the frequency, and the energization sequence of the windings of each phase of the motor can be used to control the rotation of the stepping motor. One-way asynchronous motor Asynchronous motor, also known as induction motor, is an AC motor that converts electromagnetic field into mechanical energy by interaction between the rotating magnetic field of the air gap and the induced current of the rotor winding. The principle of single-phase asynchronous motor In an AC motor, when the stator winding passes an alternating current, an armature magnetomotive force is established, which has a great influence on the energy conversion and operating performance of the motor. The single-phase AC winding is connected to single-phase AC to generate a pulse magnetomotive force, which can be decomposed into two rotating magnetomotive forces with equal amplitudes and opposite rotational speeds, thereby establishing positive and negative magnetic fields in the air gap. with. These two rotating magnetic fields cut the rotor conductors and generate induced electromotive forces and induced currents in the rotor conductors, respectively. This current interacts with the magnetic field to produce positive and negative electromagnetic torque. The forward electromagnetic torque attempts to make the rotor forward; the reverse electromagnetic torque attempts to reverse the rotor. These two torques are superimposed to be the combined torque that drives the motor to rotate. Permanent magnet motor A permanent magnet motor is an electric motor that uses a permanent magnet to provide a magnetic field. Motor work requires two conditions, one is the presence of a magnetic field, and the other is the presence of a moving current in the magnetic field. Motor sectional view shows how it works Outdoor Rental Led Display,Outdoor Led Screen Hire,Outdoor Led Screen Rental,Outdoor Rental Led Screen ShenZhen Megagem Tech Co.,Ltd , https://www.megleddisplay.com