27/10/2025
1 āĻĒā§āϰāĻļā§āύ: VFD āĻā§?
āĻāϤā§āϤāϰ: VFD (Variable Frequency Drive) āĻšāϞ⧠āĻāĻŽāύ āĻāĻāĻāĻŋ āĻāϞā§āĻāĻā§āϰāύāĻŋāĻ āĻĄāĻŋāĻāĻžāĻāϏ āϝāĻž āĻŽā§āĻāϰā§āϰ āĻāϤāĻŋ (Speed) āĻ āĻāϰā§āĻ (Torque) āύāĻŋā§āύā§āϤā§āϰāĻŖ āĻāϰāϤ⧠āĻŦā§āϝāĻŦāĻšā§āϤ āĻšā§, āĻāύāĻĒā§āĻ āĻĢā§āϰāĻŋāĻā§ā§ā§āύā§āϏāĻŋ āĻ āĻā§āϞā§āĻā§āĻ āĻĒāϰāĻŋāĻŦāϰā§āϤāύā§āϰ āĻŽāĻžāϧā§āϝāĻŽā§āĨ¤
2 āĻĒā§āϰāĻļā§āύ: VFD āĻāϰ āĻŽā§āϞ āĻāĻžāĻ āĻā§?
āĻāϤā§āϤāϰ: āĻŽā§āĻāϰā§āϰ RPM āύāĻŋā§āύā§āϤā§āϰāĻŖ āĻāϰāĻž, āĻāύāĻžāϰā§āĻāĻŋ āϏā§āĻ āĻāϰāĻž, āĻŽā§āĻāϰā§āϰ āϏā§āĻāĻžāϰā§āĻāĻŋāĻ āĻāĻžāϰā§āύā§āĻ āĻāĻŽāĻžāύ⧠āĻāĻŦāĻ āϏāĻŋāϏā§āĻā§āĻŽā§āϰ āĻāĻžāϰā§āϝāĻā§āώāĻŽāϤāĻž āĻŦā§āĻĻā§āϧāĻŋ āĻāϰāĻžāĨ¤
3 āĻĒā§āϰāĻļā§āύ: VFD āĻāϰ āĻĒā§āϰāϧāĻžāύ āĻ
āĻāĻļāĻā§āϞ⧠āĻā§ āĻā§?
āĻāϤā§āϤāϰ:Rectifier (AC â DC) DC Link / DC Bus Inverter (DC Variable AC)
Control Circuit.
4 āĻĒā§āϰāĻļā§āύ: VFD āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰāϞ⧠āĻā§ āĻā§ āϏā§āĻŦāĻŋāϧāĻž āĻĒāĻžāĻā§āĻž āϝāĻžā§?
āĻāϤā§āϤāϰ:āĻŦāĻŋāĻĻā§āϝā§ā§ āϏāĻžāĻļā§āϰ⧠āĻšā§ āĻŽā§āĻāϰā§āϰ āĻāϝāĻŧā§ āĻŦā§āĻĻā§āϧāĻŋ āĻĒāĻžā§
Soft Start āĻ Soft Stop āϏāĻŽā§āĻāĻŦ Mechanical Stress āĻāĻŽā§ āĻĒā§āϰāĻā§āϰāĻŋā§āĻž āύāĻŋā§āύā§āϤā§āϰāĻŖ (Process Control) āĻāύā§āύāϤ āĻšā§
5 āĻĒā§āϰāĻļā§āύ: VFD āĻā§āĻāĻžāĻŦā§ āĻŽā§āĻāϰā§āϰ āϏā§āĻĒāĻŋāĻĄ āύāĻŋā§āύā§āϤā§āϰāĻŖ āĻāϰā§?
āĻāϤā§āϤāϰ: āĻŽā§āĻāϰā§āϰ āϏā§āĻĒāĻŋāĻĄ āύāĻŋāϰā§āĻāϰ āĻāϰ⧠āĻĢā§āϰāĻŋāĻā§ā§ā§āύā§āϏāĻŋāϰ āĻāĻĒāϰāĨ¤
Speed = (120 x Frequency) / No. of Poles VFD āĻĢā§āϰāĻŋāĻā§ā§ā§āύā§āϏāĻŋ āĻĒāϰāĻŋāĻŦāϰā§āϤāύ āĻāϰ⧠āĻŽā§āĻāϰā§āϰ āϏā§āĻĒāĻŋāĻĄ āύāĻŋā§āύā§āϤā§āϰāĻŖ āĻāϰā§āĨ¤80
6 āĻĒā§āϰāĻļā§āύ: āĻā§āύ āϧāϰāĻŖā§āϰ āĻŽā§āĻāϰā§āϰ āϏāĻžāĻĨā§ VFD āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰāĻž āϝāĻžā§?
āĻāϤā§āϤāϰ: āϏāĻžāϧāĻžāϰāĻŖāϤ Three-phase Induction Motor āĻāϰ āϏāĻžāĻĨā§ VFD āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰāĻž āĻšā§āĨ¤
7 āĻĒā§āϰāĻļā§āύ: VFD āĻŦā§āϝāĻŦāĻšāĻžāϰ⧠āĻā§āύ āϏāĻŽāϏā§āϝāĻž āĻšāϤ⧠āĻĒāĻžāϰā§?
āĻāϤā§āϤāϰ: āĻšāĻžāϰāĻŽā§āύāĻŋāĻ āϏā§āώā§āĻāĻŋ āĻā§āĻŦāϞā§āϰ EMI/Noise āϏāĻŽāϏā§āϝāĻž
āϏāĻ āĻŋāĻ Earthing āύāĻž āĻĨāĻžāĻāϞ⧠āĻā§āϰāĻŋāĻĒ āĻšāϤ⧠āĻĒāĻžāϰā§
āĻŽā§āĻāϰā§āϰ āĻāύāϏā§āϞā§āĻļāύ āĻā§āώāϤāĻŋ āĻšāϤ⧠āĻĒāĻžāϰā§
8 āĻĒā§āϰāĻļā§āύ: VFD-āϰ āĻŽāϧā§āϝ⧠āĻā§āύ āĻĒā§āϰāĻā§āĻāĻļāύ āĻĢāĻŋāĻāĻžāϰ āĻĨāĻžāĻā§?
āĻāϤā§āϤāϰ:
Overload Protection
Over Voltage / Under Voltage ProtSyste
Over Voltage / Under Voltage Protection
Over Current Protection
Ground Fault Protection
Over Temperature Protection.
9 āĻĒā§āϰāĻļā§āύ: VFD āĻāĻŦāĻ Soft Starter āĻāϰ āĻĒāĻžāϰā§āĻĨāĻā§āϝ āĻā§?
āĻāϤā§āϤāϰ: Soft Starter āĻļā§āϧ⧠āϏā§āĻāĻžāϰā§āĻ āĻ āϏā§āĻāĻĒā§āϰ āϏāĻŽā§ āĻāĻžāϰā§āύā§āĻ āĻāĻŽāĻžā§āĨ¤ VFD āĻŽā§āĻ āϏā§āĻĒāĻŋāĻĄ āĻāύā§āĻā§āϰā§āϞ āĻāϰā§, āĻāύāĻžāϰā§āĻāĻŋ āϏā§āĻ āĻāϰā§, āĻāϰā§āĻ āĻ āĻĢā§āϰāĻŋāĻā§ā§ā§āύā§āϏāĻŋ āύāĻŋā§āύā§āϤā§āϰāĻŖ āĻāϰā§āĨ¤
10 āĻĒā§āϰāĻļā§āύ: āĻā§āύ āĻā§āύ āĻā§āώā§āϤā§āϰ⧠VFD āĻŦā§āĻļāĻŋ āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻšā§?
āĻāϤā§āϤāϰ: Fan, Blower, Pump, Conveyor System
Compressor,HVAC System.