Rotate Brushless AC motors in under a minute

As a result of this, both can motor control reference platforms rotate a permanent magnet AC motor in less than one minute. Based on Renesas’ 32-bit RX family of MCUs, both inverter kits revolutionise the integration of 3-phase motors in equipment. The kits have been developed in response to a challenge encountered by engineers: tuning the embedded software to the application requirements, especially for sensorless field oriented control algorithms.

Offering 50DMIPS, the RX220 inverter kit is designed for equipment requiring medium dynamics and a low-cost bill of material. The RX62T kit offers 165DMIPS and provides the dynamics required to drive motors with a high level of accuracy. The RX62T microcontroller integrates six operational amplifiers, six comparators, a floating point unit and two timer units to drive two 3-phase motors simultaneously. The inverter kits provide auto-tuning of the current proportional-integral coefficients (Kp & Ki), identification of intrinsic motor parameters (Rs, Ls & Lm) and real-time visualisation of the motor phase, current and step response.

An intuitive PC GUI provides engineers with a ready to use inverter reference prototype that enables them to drive their own motors in just a few clicks. They also feature a sensorless vector control algorithm. Used to accurately control the speed and the torque, the algorithm uses flux weakening in order to achieve rotation speeds higher than the nominal speed of the motor.

Additionally, each kit contains: the YROTATE-IT inverter board; a 24V DC permanent magnet AC motor; a CD-ROM including the embedded software source code; the PC GUI, the board schematics; the bill of materials; user manual; quick start guide; and the power stage schematics/Gerber files.

The YROTATE-IT-RX220 and YROTATE-IT-RX62T inverter kits are available now.