Variable speed conveyor equipment advantages and disadvantages

Transportation equipment is often used on the drive to control, but there are advantages and disadvantages of frequency control , the following Chengdu solid Nashville for everyone explain in detail : 1 , speed , high efficiency, high- speed mode belongs . This is due to a 90 degree turn conveyor change in frequency , the motor is still near synchronous speed

Run , remained rated slip . Only in the frequency converter system will produce variable flow losses , as well as the impact of higher harmonics , motor loss increases , and thus the efficiency decline. 2 , wide speed range , generally up to 20:1 , and in the entire speed range with high

Speed ??efficiency. So inverter for wide plastic chain conveyor speed range , and often run in the low load condition of the occasion . 3, the mechanical properties of hard, in the absence of automatic control, the speed change rate below 5% ; When using automatic control , can do high-precision operation , the speed fluctuation rate control

System at 0.5% | ~ 1% or so. 4, the inverter device in case of failure , you can quit running , replaced by direct power supply, pump or fan may continue to remain in operation . 5, can double as the boot device , namely through the power inverter to a rotational speed of the motor starts , and then disconnect the power inverter,

Motor can be connected directly to the power frequency of the pump or fan to accelerate to full speed. In power supply to the power switch frequency , generally 400% to 500 % of the impact of current generation, the instantaneous grid voltage drop , motor subjected to mechanical shocks. To prevent this phenomenon, in the motor

And work in parallel between a start frequency power reactors, in order to suppress inrush current at start of production. If the original motivation for the synchronous motor , you need a " synchronous switching ."