What are the advantages of DC310V brushless DC motor?

Compared with AC 220V, 50/60Hz asynchronous motors, in order to obtain good performance and optimal cost, DC310V motors have the following natural advantages:

·AC220V can be obtained with a very low-cost rectifier + filter circuit

·In fact, 220v*√2 is 310v

·Now the chip integrates MOSFET, crystal oscillator, position Hall, etc., with extremely high integration

·After AC is converted to DC voltage, it is easy to achieve three-phase input to the motor coil end, greatly reducing vibration and running relatively smoothly

·Easy to obtain 0-5/10Vdc or PWM stepless speed regulation

·Due to the use of permanent magnet excitation, the loss is small and the energy efficiency is greatly improved