VFD working principle & activities with diagram

About All kind of VFD working principle & activities

1. WELCOME TO TRAINING SUBORDINATE DEVELOPMENT OF V.F.D With :- Zakariya Choudhury

2. INTRODUCTION TO VFD VFD IS A ELECTRONICS DEVICE WHICH CONTROL FREQUENCY OF POWER SUPPLIED TO A AC MOTOR TO CONTROL THE ROTATION SPEED OF THE MOTOR. VFD CONTROL THE FREQUENCY BY CONVERTING DC (DIRECT CURRENT) TO AC (ALTERNATIVE CURRENT) VFD FUNCTION IS TO ADJUST MOTOR SPEED TO FULFILL THE REQUIREMENTS OF THE RESPECTIVE MOTOR OR LOAD. THE RESULT ARE BETTER PROCESS CONTROL & REDUCED ENERGY.

3. Most common terminologies of AC drive Inverters Frequency Converter (FC) Variable Frequency Drive (VFD) Adjustable Frequency Drive (AFD) Adjustable Speed Drive ( ASD) Variable Speed Drive(VSD)

4. AC Drive Manufactures

5. Why Use A Drive ? Speed and torque control Reduce mechanical stress on machines(soft start) Motor protection Save energy and improve efficiency of systems AC Drives Basics-1

6. BLOCK DIAGRAM OF VFD

7. The main elements of VFD working are – the rectifier, DC bus, inverter, PWM controller, and filter. First, the AC voltage is converted to DC voltage through a rectifier, which is stored in a capacitor bank or DC bus. The inverter again converts DC voltage to AC voltage, and the output voltage is modulated by varying the pulse of the waveform through IGBT . The filter will remove high-frequency noise from the output voltage. What are the main elements of a VFD ?

8. AC Drives Basics-1 AC Drive power circuit : 1-Rectifier 2-DC Link (chagrin circuit+ filter + capacitors ) 3-Brake unit 4-Inverter AC DC AC 1 2 3 4

9. Steps to Properly Maintain a Variable Frequency Drive 1. Make sure that you have taken permit to work . 2. Put off MCCB, wait for 5 mint for discharging its power 3. Clean properly every corner of vfd by blower. 4. Now check every connection it should be tight

10. THANK YOU