Brushless motor (Commonly known as & other; Motor & throughout; ）Refers to according to the law of electromagnetic induction electrical power conversion or transfer of an electromagnetic device. In the marked letter M circuit. Its main function is to produce drive torque, as with all electrical appliances or mechanical power. Generator in circuit with the letter G said. Its main function is to use electrical energy into mechanical energy. motor mainly includes a magnetic field to produce electromagnetic winding or the distribution of the stator winding and a rotation of the armature and rotor or other accessories. Under the effect of rotating magnetic field of stator winding, its a current in the armature squirrel-cage aluminum box by and by the magnetic field effect and make the turn.
the stator (Stationary part)The stator iron core: part of motor magnetic circuit, and placed on the stator winding; Stator winding: is the circuit part of the motor, to the three-phase alternating current (ac), produce a rotating magnetic field; Frame: fixed ends and to support the rotor, stator core and plays a role of protection, heat dissipation and so on;
the rotor (Rotating parts)Rotor core: as part of motor magnetic circuit as well as in the core place rotor winding groove; Rotor winding: cutting the stator rotating magnetic field induced electromotive force and the current, and form the electromagnetic torque and motor rotation; Dc motor
dc motor is a dc can be converted into mechanical energy (Dc motor)Or can convert mechanical energy into direct current (Dc generator)The rotation of the motor. It is to achieve can direct current motor and mechanical energy conversion from each other. When it is a dc motor, motor runtime converts electrical energy into mechanical energy. Make generator operation is a dc generator, the mechanical energy into electricity.
bring about dc motor physical model diagram above physical model diagram of dc motor, magnet fixed part, known as the main pole here; Fixed part and brush. Rotational part with annular core and winding around the annular core. (Two small circle is for the convenience of the conductor said the position and set up in the direction of the voltage or current)
stepper motor
the stepping motor is the electrical pulse signal into angular displacement or linear displacement of open loop control stepping motor. In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number,, and not affected by load change, when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle. Can be controlled by controlling the pulse number of angular displacement, so as to achieve the purpose of accurate positioning; As well as by controlling the pulse frequency to control motor rotation speed and acceleration, so as to achieve the purpose of regulating.
working principle of the step motor when current flows through the stator winding of the stator winding is a vector field. The magnetic field can drive the rotor rotating an Angle, make a pair of rotor magnetic field direction in line with the stator magnetic field direction. When the vector magnetic field of the stator rotating an Angle. Also as the rotor magnetic field to turn an Angle. For every input electrical impulses, a rotary Angle of motor before further. Its output angular displacement is proportional to the input pulse count, speed is proportional to the pulse frequency. Changing the order of the winding current, the motor will be reversed. So the available control pulse number, frequency and various phase winding of the motor power in order to control the step motor rotation. Unidirectional asynchronous motor
asynchronous motor is also called induction motor, the rotating magnetic field is made up of air gap and the rotor winding induced current interact to produce electromagnetic torque, so as to realize the mechanical and electrical energy into mechanical energy of an ac motor. the working principle of single-phase asynchronous motor in ac motor, when the stator winding through the alternating current, established the armature magnetomotive force, it to electrical energy conversion and performance has very big effect. So access to single-phase ac winding single-phase ac pulse vibration magnetomotive force, the magnetomotive force can be decomposed into two equal amplitude, rotational speed of rotating magnetomotive force and to the contrary, to set up in the air gap and of being wild and reverse magnetic field. The two rotating magnetic field cutting rotor conductors, and produce inductive electromotive force and inductive current in the rotor conductors.
the electric current and magnetic field interact to produce positive and inverse electromagnetic torque. Positive electromagnetic torque in an attempt to make the rotor is turned. Inverse electromagnetic torque in an attempt to make the rotor inversion. Add up these two torque of synthesis of rotation of the driving motor. permanent magnet motor
permanent magnet motor is provided using permanent magnet motor magnetic field. Motor power, need two conditions, there is a magnetic field, another is the presence of movement of the current magnetic field.
