fluid coupling comparison with the inverter

1 Tuner directly driven by the motor because the machine , so need to use than the actual motor power of the motor, in order to help achieve a smooth start.
2 fluid coupling drive prices are generally Hydraulic tube fittings  lower than 20% , greater power is only 50-70% of the price of the drive system .
3 high-order wave inverter output will reduce motor efficiency, increase heat. For cooling, the motor need to increase or install cooling fans . ( Motor cooling function and speed is proportional to the motor with fluid coupling designed for constant speed ) .
4 waves are generated by the inverter may damage the flexible coupling torque spikes and even machines.