Inverter and Motor Drive System - KRS INDUSTRIAL CONTROL SYSTEM CO., LTD

About the project

Date: 2024
Client: Starch Processing Plant
Category: Drives & Motor Control
Address: Nakhon Ratchasima, Thailand

Project Information The Inverter and Motor Drive System project covers the selection, installation and commissioning of variable frequency drives for process motors across the plant. Replacing fixed speed starters with inverters allows each machine to run at the speed the process actually needs, which reduces energy consumption and mechanical stress on the driven equipment. Our scope covered drive sizing and selection, panel design with proper cooling and EMC practice, power and control wiring, parameter configuration, fieldbus integration with the plant PLC, and commissioning with load testing and fine tuning of ramp times and current limits.

Benefits of Project

Lower electrical energy consumption on variable load equipment
Soft starting that reduces mechanical and electrical stress
Accurate speed control that stabilises the process
Built in motor protection and fault diagnostics
Reduced maintenance cost and longer equipment life

Technologies We Used

ABB ACS580 and ACS880 drives
Danfoss VLT AutomationDrive
Siemens SINAMICS drives
Allen-Bradley PowerFlex drives
PROFINET, Ethernet/IP and Modbus integration
Line reactors, filters and EMC compliant cabling
Motor protection and thermal monitoring

Speed Matched to What the Process Needs

A fixed speed motor delivers full output whether the process needs it or not, and the excess is thrown away across a valve or a damper. Replacing the starter with an inverter lets the motor turn only as fast as the duty requires. On pumps and fans the saving follows the affinity laws, so a modest reduction in speed produces a large reduction in absorbed power.

Protection and Diagnostics Built In

Each drive continuously measures current, torque, temperature and DC bus voltage, so an overload, a phase loss or a blocked impeller is detected and logged before it becomes damage. The fault history stays in the drive and is also reported to the PLC, which gives the maintenance team a record to work from instead of a tripped breaker and a guess.