A noun explanation:

DC motor: DC power supply

Communication motor: is the use of communication power as the power supply.

Two, structural analysis:

The principle of the DC motor of the mixer / mixer is relatively simple, but the structure is complex and not easy to protect. While the principle of the motor is complicated but the structure is relatively simple, and is easier to protect than DC motor.

Three, operating principle:

The DC motor of the mixer / mixer is introduced into the rotor armature by brush and commutator, which makes the rotor rotate in the stator magnetic field.

Communication (communication to motor asynchronous motor used for example) is put into the communication electric stator winding, resulting in a rotating magnetic field in stator and rotor air gap, magnetic field induced current in the rotor winding, the rotor in the stator magnetic field force in rotation. DC motor speed regulation is simple, but the use of limited. Communication motor speed is relatively messy, but due to the use of communication power and widely used. Communication speed is to change the frequency of communication power supply to change the speed of the motor, DC is to adjust the armature voltage to speed. Today, the use of communication speed, energy saving, motor defects are also less.

Four, communication motor and DC motor advantages and disadvantages:

The DC motor has the advantages of high sensitivity, large starting torque, and additional torque from zero speed to extra speed

Defects due to DC motor to secure additional load torque function, then the armature magnetic field and magnetic field of the rotor must adhere to the constant 90 degrees, it will be through a carbon brush and a commutator. In the rolling brush and commutator motor will occur when the spark, so in addition to toner will constitute the damaged component, application is restricted.

No communication motor brush and commutator, free protection, stability, wide use, but if you want to reach the equivalent characteristics of DC motor control skills to get the function messy used to be. The motor is divided into two types: asynchronous motor and synchronous motor. Asynchronous motor is divided into single-phase asynchronous motor, two-phase asynchronous motor and three-phase asynchronous motor. Three phase asynchronous motor structure is simple, reliable operation, low cost, etc..

However, whether it is the selection of DC motor or variable current motor, we must select the appropriate equipment for their own materials.