GaN power startup offers HVAC module

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By Peter Clarke

Startup Quantum Power Transformation Ltd has launched its first product, a power module based on two gallium nitride transistors suitable for motor drives in heating, ventilation, and air conditioning (HVAC) systems.

QPT founder and CEO Rob Gwynne said, “GaN transistors have always promised the best performance and efficiency over silicon MOSFETs and silicon-carbide, but they are notoriously difficult to drive at speed. We have developed an entirely new and unique topology for driving GaN transistors allowing them to switch at speeds of up to 20MHz, delivering major benefits in power consumption and efficiency.”

Business Development Manager Richard Ord added: “Electric motor driven systems (EMDS) consume 45 percent of the world’s energy, and yet their efficiency at typical operating speeds can be as low as 50 percent. Our solution tackles performance across the range of operating speeds and could improve efficiency by up to 35 percent.”

QPT, founded in December 2019, has developed novel approaches by providing GaN transistor drivers with picosecond timing precision and digital control loops. This combined with converter topologies based on RF techniques enables low loss switching, the company claims. Algorithms support state-variable control with bandwidths of up to 20MHz for sophisticated four-quadrant operation and both non-resonant and resonant switching.

The qGaNDrive Module from QPT integrates their core topology with two GaN 650V transistors in a fully EMC-screened turn-key power module that measures 60mm by 30mm

 The three-terminal device works with any motor driver up to 500W. The company estimates that when applied to a typical 15kW domestic heat pump could deliver a return in energy savings in one hundred days or less.

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