Main classification of DC motor

Excitation mode

Shunt DC motor

And the shunt wound DC motor excitation winding and the armature winding are connected in parallel, as a shunt generator, motor terminal voltage excitation winding power supply; as a shunt motor, excitation winding and the armature sharing the same power, from the performance about separately excited DC motor with the same.

Compound excitation DC motor

Shunt DC motor with two excitation windings and shunt excitation. If the series of magnetomotive force direction of magnetomotive force produced by winding and winding the same product called compound. If the two flux potential directions are opposite, the difference is called the differential excitation.

He Shunt DC motor

The excitation winding and the armature winding no connection, and by other DC power supply for the excitation winding of DC Motor said as he excited DC motor, permanent magnet DC motor can also be as excited or self-excited DC motor and is generally referred to as the excitation method for permanent magnet.

Series Shunt DC motor

Series DC motor excitation winding and armature windings are connected in series, and then connected to the DC power supply. The excitation current of the DC motor is armature current..

Characteristic

Different excitation mode DC motor has different characteristics. General DC motor main excitation mode is excited him and on excitation, excitation, in the electronics industry continuously improve will gradually be eliminated, the main mode of excitation DC generators have He excitation, and excitation and complex excitation mode.

Main classification

Brushless DC motor

The brushless DC motor in recent years with the development of microprocessor technology and high frequency switch,

The application of low power consumption of the new power electronic devices, and control optimization method and low cost, high energy level of permanent magnetic materials appeared and developed a new type DC motor.

No brush DC motor not only maintains the traditional DC motor's good speed performance and has no sliding contact and commutation spark, high reliability, long service life and low noise, etc., and in the aerospace, numerical control machine tools, robots, electric car, computer peripheral equipment and household appliances are widely used.

According to different power supply mode, no brush DC motor and is divided into two categories: square wave brushless DC motor, the back EMF waveform and power supply current waveform are rectangular wave, also known as rectangular permanent magnet synchronous motor; sine wave without brush DC motor, the back EMF waveform and power supply current waveform is sine wave.

DC motor

Convert the DC power to the rotating device of the mechanical energy. Motor stator magnetic field, DC power to the rotor winding to provide current commutator make rotor current and the magnetic field generated torque remains unchanged.

DC generator

DC generator is to convert mechanical energy into DC power machine. It mainly as DC motor, electrolysis,

DC motor, electric smelting, electroplating and charging alternator excitation power required.Although in need of DC power, power rectifier to convert AC to DC, but from the point of view of some of the work performance, AC rectifier power still can not completely replace DC generator.