About 100W ac motor is better than dc motor
For ac generator, it can realize the energy of the "direct" back to the grid (but must ensure that the four conditions: the same voltage amplitude, phase, phase sequence, same same frequency); But dc generator power inverter is required (convert alternating current to direct current (dc) according to the process of rectification, the process of convert dc to ac inverter), to feedback to the grid. So it also needs to increase the power inverter.
Depending on what you do with the motor, each has its own characteristics. The main difference between ac and dc motors is that the power supply is different, the ac motor USES alternating current, and the generator is alternating current. Direct current motors use direct current, and generators emit dc points. The advantage of dc motor (compared to ac motor) is the ability to achieve economic and smooth speed regulation. Ac motors need to be able to do this using a converter, an electromagnetic regulator, etc. Power and speed must be the same speed of dc motor and ac motor, dc motor price is a little more expensive, mainly because it must have a complex "commutator" to realize the ac/dc conversion. This also increases the manufacturing cost of dc motors.
The answer is very specific. Ac motor and dc motor are used for different purposes, you can reconnect according to the theory, the industry experience of your relevant industry is applied. That would be better.
