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Renesas

New MCUs Support Predictive Maintenance Solution for Motors Based on Google’s TensorFlow Lite

Renesas has extended its RA Family of Arm® Cortex®-M core-based microcontrollers, introducing four new RA6T1 group MCUs - the first Renesas RA MCUs to meet the unique needs of motor-control applications in market sectors such as home appliances, heating, ventilation and air conditioning, solar inverters, and AC drives.

The RA6T1 MCUs mark a breakthrough in the field of predictive maintenance for motors: for the first time, Renesas has built in support for Google’s TensorFlow™ Lite machine learning platform into its motor control and predictive maintenance solution. This makes it easier for designers of motors to implement Artificial Intelligence (AI) for automatic detection and analysis of anomalies which could indicate the early signs of motor failure. This helps OEMs’ customers to improve their predictive maintenance processes and reduce maintenance costs.

Based on the Arm Cortex-M4 core, the new RA6T1 32-bit MCUs operate at a clock frequency of 120MHz. They offer a rich set of peripherals optimized for high-performance motor control. For instance, the MCU’s 12-bit ADC has a maximum speed of 0.4µs, and a sample/hold function which allows simultaneous acquisition of three shunt-current measurements.

By integrating the peripheral and high-speed analog functions needed in motor-control designs, these MCUs enable OEMs to markedly reduce bill-of-materials cost while boosting motor-system performance. A single RA6T1 MCU can simultaneously control two Brushless DC (BLDC) motors.

Renesas also offers a new Renesas Solution Starter Kit (RSSK) for developers working on a motor control solution using the RA6T1 MCUs. The RSSK offers easy motor control debugging, and allows customers to immediately begin evaluating their motor control design, executing real-time analysis and tuning to accelerate development.

The easy-to-use motor solution includes an RA6T1 CPU card and 48V-compatible inverter board, along with a GUI tool for motor workbench, and a sensorless vector control sample program with three-shunt method which corresponds with the Flexible Software Package (FSP). Using the RA Family FSP makes it easy for customers to port the sample code to their program.

Features

  • Scalable from 64- to 100-pin LQFP packages
  • 64kbytes of RAM
  • Up to 512kbytes of Flash
  • 32-bit PWM timer
  • 250µs sampling period when used with the motor control solution bundle
  • Six-channel programmable gain amplifier
  • Supports IEC 60730 standard for functional safety in home appliances

Applications

  • Motor-control systems in:
    • Smart homes
    • Industrial automation
    • Building automation

Development Kit

The Motor Control Evaluation System for RA Family - RA6T1 Group is a low-voltage permanent magnet synchronous motor solution which allows designers to start evaluating motor control technology immediately. It includes:

  • 48V inverter board
  • RA6T1 CPU card
  • Permanent magnet synchronous motor
  • Cables