Motion control evaluation platform speeds development of BLDC motor applications

The TB6582FG_EVB3 brings together Toshiba’s latest motor controller IC ASSP and the company’s single-chip inverter drive technology to provide a complete sensorless sine wave motor control and driver solution on a single board. Engineers can quickly test and prototype sensorless motor drive applications with input main voltages of up to 220V(AC) by simply connecting power supplies for the circuitry and the target motor and providing a suitable speed control signal input.

At the heart of the new platform is the Toshiba TB6582FG single-chip sensorless sine wave motor control ASSP. The TB6582FG takes analogue speed inputs from a host microcontroller and provides a complete full-wave sine wave PWM motor drive output without the need for additional processing. Using the evaluation platform, engineers can combine this IC with one of Toshiba’s TPD412x single-chip inverters to provide a complete motor drive system with input main voltages to 220V(AC) and output currents from 1A to 3A. Control of motor rotation speed in both forward and reverse directions is then achieved simply by changing the PWM duty cycle based on the input from a host microcontroller.

The TB6582FG features integral circuitry that accurately calculates rotor speed and position using phase current information, eliminating the need for Hall sensors. A triangular wave generator with a carrier wave frequency of fosc/252Hz and an integrated dead time function are also incorporated into the device. In addition, a lead angle adjustment capability allows applications to be tuned for optimum efficiency.

Toshiba’s new evaluation platform is fully compatible with the company’s TPD4120 (2A), TPD4123 (1A) and TPD4125 (3A) single-chip, 500V inverters. Housed in a DIP26 package, each of these chips combines high-and low-side drivers with six IGBTs to supply current to the motor stator coils. Additional integrated features include fast recovery bootstrap diodes and onboard protection against overtemperature, overcurrent and undervoltage conditions.