Efficient Power Conversion (EPC) has released the EPC91202 evaluation board, a three-phase inverter reference design aimed at speeding up the development of high-efficiency brushless DC motor systems. It is suited for applications like robotics, drones, e-mobility, and industrial automation.
The board is built around the EPC2361 gallium nitride transistor and can handle peak currents up to 70 A, with 50 A RMS per phase. It supports switching frequencies as high as 150 kHz, which helps minimize motor noise and allows the use of smaller passive components compared to traditional silicon-based designs.
Designed for battery-powered systems, the inverter operates across an input range of 14 V to 76 V. It integrates all key supporting circuits, including gate drivers, auxiliary power supplies, current sensing, and protection features, making it a complete development platform.
The board includes built-in sensing for current, voltage, and temperature, enabling advanced control methods such as field-oriented control and space-vector PWM. It also supports both sensor-based and sensorless configurations through interfaces for encoder and Hall-effect feedback.
To improve performance in precision applications, the design keeps switching voltage rates under control to limit electromagnetic interference, reduce noise, and ensure smoother motor operation.
The EPC91202 is compatible with control platforms from various microcontroller vendors, allowing easy integration into existing development environments. It targets use cases like robotic joints, compact servo drives, drones, and other systems requiring high efficiency and power density, and comes with full design resources to support evaluation and customization.
