Industry White Paper

Trapezoidal Control of BLDC Motors

October 12, 2022 by onsemi
Topics Covered
  • Over−Current Protection (OCP)
  • Over−Voltage Protection (OVP)
  • Over−Temperature Protection (OTP)
  • MOSFET Selection
  • Sensored and Sensorless Trapezoidal Motor Control Systems

White Paper Overview

Trapezoidal control is one of the simplest BLDC motor control methods available. By applying square-wave currents to the motor phases that align with the BLDC motor, optimum torque is generated. Benefits of trapezoidal control include over-current protection, over-voltage protection, and over-temperature protection. Combining trapezoidal control with essential protection and design techniques can be one of the most efficient methods of driving an electric motor for power tools and robotics by improving the control and accuracy of the motors.