Technology

The emergence of a new generation of power electronics transistors, known as wide-bandgap (WBG) devices like Gallium Nitride (GaN) and Silicon Carbide (SiC) transistors, brings significant advancements to the field. These WBG transistors offer distinct benefits, such as low RdsON, fast switching capabilities, and minimal switching losses, which together open the door to a wide range of new possibilities.

When applied to motor drives, these unique properties enhance energy efficiency and signal quality, translating into real-world benefits: increased motor efficiency, rapid control response, reduced torque ripple, and smaller, cost-effective filter sizes, among others.

However, leveraging the full potential of wide-bandgap technology and high switching frequencies also introduces its own set of technical challenges. Achieving these gains requires more than just incorporating advanced technology—it demands precise engineering and a deep understanding of how to integrate these components effectively.

Multilevel inverters (MLIs) serve as essential power converters for energy conversion systems in various industrial applications. Their technology plays a critical role in renewable energy conversion systems, grid-connected inverters, electric transportation, electrical vehicles, aerospace, and other industrial plant applications.

Despite their numerous advantages, MLIs have yet to enter the Low Voltage Motor Control market primarily due to concerns over their theoretical high cost. However, the benefits of integrating MLI technology are compelling. MLIs significantly improve harmonic content, reduce dv/dt (voltage change rate), lower switching frequencies and losses, decrease electromagnetic interference (EMI), and enhance fault-tolerant capabilities.

By incorporating MLIs into products, users can achieve a substantial increase in overall efficiency and a much lower total cost of ownership, making them a valuable investment for future-oriented industrial applications

Precise control and modulation algorithms are needed to take full advantage of WBG and MLI applied to motor drives.

SmartD’s strong IP portfolio of control and modulation algorithms reduce the size and number of passive elements needed in inverters while enabling sensor-less VFD control. This decreases the cost of the product and increases its reliability.

WBG transistors do not necessarily generate benefits everywhere they are used. Using our innovative modulation method enables SmartD to use WBG transistors optimally. They are only used where product design requires it, thereby getting the most out of their properties while minimizing cost.