The difference and advantage between DC motor and AC motor
Alternating current dynamo：Advantages: 1.. Simple structure2. low manufacturing costs, 3. maintenance, simple economy.Disadvantages: can not speed up their own, you need to use frequency conversion equipment to achieve speed changes.
Can realize speed regulation.Disadvantages: 1.. Complex structure and high manufacturing cost;2. maintenance trouble, high maintenance cost;
DC motor：Advantages: 1., you can achieve a smooth and economical speed adjustment;2. does not require the coordination of other equipment, as long as the input or excitation voltage, current
