1. Efficiency: AC synchronous motors are generally more efficient than DC series motors. This is because AC motors do not have the same losses associated with commutation, which is the process of reversing the current in the motor's windings.
2. Controllability: AC synchronous motors can be controlled more precisely than DC series motors. This is because the speed of an AC synchronous motor is directly proportional to the frequency of the AC current that is supplied to it.
3. Reliability: AC synchronous motors are more reliable than DC series motors. This is because they do not have the same mechanical wear and tear associated with commutation.
4. Size and Weight: AC synchronous motors are generally smaller and lighter than DC series motors. This is because AC motors do not require the same bulky field windings as DC motors.
5. Cost: AC synchronous motors are generally less expensive than DC series motors. This is because they are simpler to manufacture.
In summary, AC synchronous motors are more efficient, controllable, reliable, compact, and cost-effective than DC series motors. These advantages make them the ideal choice for use in modern hybrid vehicles.
