Why is Tesla's Model s electric vehicle using AC motor instead of the more popular frequency conversion DC motor?
1, the DC motor structure is complex, the cost is relatively high, late maintenance trouble.2, larger motors are required to be connected to large cooling fans.3, it can realize the speed regulation simply and economically. Big torque and good mechanical characteristics.4, AC motor structure is simple, low cost, simple maintenance. You can't speed it yourself. In the past, the frequency conversion was not timely, and the DC motor was used in places requiring good speed control (machine tools, cranes, textiles, etc.).
The structure of DC motor is complex, the cost is relatively high, and later maintenance is troublesome. Larger motors require an external cooling fan. Can be very simple to realize the speed of the economy. Big torque and good mechanical characteristics. The AC motor has the advantages of simple structure, low cost and simple maintenance. You can't speed it yourself. In the past, the frequency conversion was not timely, and the DC motor was used in places requiring good speed control (machine tools, cranes, textiles, etc.). However, with the development of frequency conversion, the performance of vector frequency conversion + frequency conversion motor is close to that of DC motor.
However, with the development of frequency conversion, the performance of vector frequency conversion + frequency conversion motor is close to that of DC motor.AC motor: a machine used to convert mechanical energy and alternating current energy. AC motor has become the most common motor because of the great development of AC power system. Compared to the AC motor and DC motor, because there is no commutator (see DC motor commutation), therefore has the advantages of simple structure, convenient manufacture, relatively strong, easy to make high speed motor, high voltage, high current, large capacity. The coverage of AC motor power greatly, from a few watts to several 101000 watts, even millions of kilowatts.
