Скачать или смотреть VFD Work|| VFD working principle ||Variable Frequency Drive||Induction Motor||Inverter||Rectifier

ଜୟ ଜଗନ୍ନାଥ ଏହି video ରେ ତମେ ମାନେ Variable Frequency Drive କଣ ବିଷୟରେ ଜାଣି ପାରିବ
VFD is shorted for Variable Frequency Drive (also known as AC Drives and Inverters) -- that's used to make an AC motor working in variable speed (among other parameters). This is definition used in all topical discussion on this paper. A basic VFD system generally consists of an AC motor, a controller, and an operator interface.

VFD for AC motors have been the innovation that has brought the use of AC motors back into prominence. The AC-induction motor can have its speed changed by changing the frequency of the voltage used to power it. This means that if the voltage applied to an AC motor is 50 Hz (used in countries like China), the motor works at its rated speed. If the frequency is increased above 50 Hz, the motor will run faster than its rated speed, and if the frequency of the supply voltage is less than 50 Hz, the motor will run slower than its rated speed. According to the variable frequency drive working principle, it's the electronic controller specifically designed to change the frequency of voltage supplied to the induction motor.

In the 1960s, VFDs had rather small solid-state components that limited the amount of current the VFD could supply to the motor. This usually limited the size of the motor that could be controlled by a frequency and they were not commonly used. When larger transistors became available in the 1980s, VFDs allowed the largest motors to have their speed controlled. The earliest VFDs used linear amplifiers to control all aspects of the VFD. Jumpers and dip switches were used provide ramp-up (acceleration) and ramp-down (deceleration) features by switching larger or smaller resistors into circuits with capacitors to create different slopes.VIDEO ଟିକୁ ସମ୍ପୂର୍ଣ ଦେଖି ଥିବାରୁ ଧନ୍ୟବାଦ
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