Motor Control Architecture for Factory Automation

Motor Control Inverters: An Overview of Architecture and Control Algorithms

Motor control inverters are essential components of modern automation, enabling precise control of electric motors used in conveyors, robotics, pumps, compressors, and manufacturing machinery. By transforming fixed-frequency AC power into adjustable voltage and frequency outputs, these systems enable motors to run across a wide range of speed and torque requirements.
 
This whitepaper covers the main architecture of a three-phase motor control system, including the control board, power stage, sensing circuits, and communication interfaces that facilitate closed-loop operation. It highlights key design features like PWM-based control, voltage and current sensing, thermal monitoring, and isolated gate driver control.
 
You will also discover how modern platforms incorporate advanced control methods such as field-oriented control (FOC), vector control, and direct torque control, while also integrating safety features and industrial communication interfaces essential for factory automation.
 
What You’ll Learn:

• Architecture of a three-phase motor control inverter
• Power MOSFET switching and isolated gate driver control
• Protection, isolation, and fault management mechanisms
• Industrial communication and automation interfaces
• Control algorithms including FOC, DTC, and vector control