Advance Variable frequency Drive (VFD)/Inverter/Adjustable Speed skills

Design – Simulation-Automation -Control
Advance Programmable Logic Controllers (PLC) Skills
For more info contact: Tel: 08133476558, 07085740887
Address: Opebi, Ikeja, Lagos State, Nigeria


Variable frequency Drive (VFD)/Inverter/Adjustable Speed Drive
Module 1
VFD History
- Introduction
- Semiconductors in VFD Design
- SCRs / GTOs / Transistors / IGBTs / LSI
What VFDs Do
- Motion Control / Motor Speed
- Air Flow / Pressure Control
- Liquid Flow / Pressure Control
- Eliminates the need for:
- Variable Transmission or Sheave- Variable Vanes or Dampers on Fans
- Variable Valves on Pumps
Benefits of using a VFD
- Energy Savings
- Easier Maintenance
- Enhanced System Monitoring
Module 2
Load Types
- Constant Torque – Conveyors, Positive Displacement Pumps, Superchargers
- Variable Torque - Centrifugal Fans or Pumps, Saws, Routers, Planers
VFD Options
- Bypass - Two or Three Contactor Style, Disconnect Switch Style, Soft Starter
- Fusing - VFD or Bypass Protection- Input / Output Reactors
- Motor Overload Device
- Transient Protection
- Auxiliary Relays
- Power Line Phase Reversal Detection
Module 3
Installation of a VFD
- Environmental Concerns
- Clearances
- Conduit Entry
Customer Connections
- Safety Circuit
- Start / Stop
- Jog
- Status Indication
- Fault Indication
- Remote Speed Reference
- Monitoring of Motor Parameters
Module 4
Wiring & Grounding VFDs
- Induced Signals
– Inductive, Capacitative
- Incoming Power (line) Wiring
- Motor (load) Wiring
- Control Wiring
- Proper Grounding Methods
Module 5
Controlling a VFD
- Keypad Controls
- Terminal Strip Control – Automatic, Manual
- Bus Communication Control
- Open Loop Control
- Manual Operation
- Automatic Operation
- Sensorless Flux Vector
- Closed Loop Control
- PI Loop Configuration
- Sensor or Transducer Feedback
- Motor Shaft Encoder Feedback
Module 6
VFD Setup, Programming and Troubleshooting
- Language & Display
- Control Modes
- Open Loop, Closed Loop
- Motor Data
- Motor Power (kW) and RPM
- Voltage, FLA Current
- Service Factor, Power Factor
- References & Limits
- Motor Speeds – Min, Max and Preset
- Ramp Times
- Speed Reference
- Skip Frequencies
- Limits for Alarms or Faults
- Inputs / Outputs – Analog, Digital, and Relay
- Application Functions
- Reset
- Flying Start
- Sleep Mode
- Switching Frequency
- No Load
- Phase Loss
- Closed Loop Functions
- Normal / Inverse
- Anti Windup
- Start-up Frequency
- Integral Time / Differential Time
- Proportional Gain / Differential Gain
- Lowpass Filter.
e.t.c
Design – Simulation-Automation -Control
Advance Programmable Logic Controllers (PLC) Skills
For more info contact: Tel: 08133476558, 07085740887
Address: Opebi, Ikeja, Lagos State, Nigeria