What are the advantages and disadvantages of AC and DC motors?
AC motor without carbon brush and commutator, maintenance free, strong and wide application, but the characteristics to achieve performance equivalent to DC motor to be used to achieve complex control technology. AC motor is divided into two categories: asynchronous motor and synchronous motor. Asynchronous motor is divided into single-phase asynchronous motor, two-phase asynchronous motor and three-phase asynchronous motor according to the number of stator phases. The three-phase asynchronous motor is simple in structure, reliable in operation and low in cost.
DC motor has fast response, large starting torque and rotational speed from zero to the rated speed with rated torque available performance, but the advantages of DC motor is a DC motor because of its disadvantages, to generate performance under rated load torque is constant, the armature magnetic field and the rotor flux to maintain constant 90 degrees, this by brush and commutator. Carbon brush and commutator motor rotates in sparks, so in addition to cause toner component damage, use is restricted.
The DC motor is easier to control than the AC motor. It can be applied to a wide range of speed regulation. It can be used in power braking, but it is more complex and more complicated than the maintenance of AC motors.
