Servo motor is first to use Gallium Nitride

September 21, 2017 // By Nick Flaherty
Yaskawa Electric in Japan has developed the first servo motor to use gallium nitride power devices using technology from Transphorn in the US. 

Yaskawa’s Σ-7 F is the first servo motor to use high-voltage (HV) 650V GaN for a smaller form factor than today's silicon semiconductors. This has been possible by integrating the servo amplifier with the servo motor itself to reduce the size by half.

The Σ-7 F series of AC servo motors in a three-phase bridge configuration use the gaN FETs in a standard three lead TO-220 package. The topology will be deployed across Yaskawa’s full Σ-7 F product line, which currently includes three servo motors ranging from 100W to 400W. The integrated motor allows the industrial manufacturing system to simplify cabling in a daisy chain configuration.

The design reduces the system’s control panel cabinet size by as much as 30 percent by reducing the size of the servo motor, eliminating the power supply cable’s terminal block due to a reduction in cabling required and using a smaller heat sink due to lower losses.

The Σ-7 F targets industrial multi-axis automation systems commonly used in conveyance equipment as well as food product and packaging manufacturing.

“The Σ-7 F servo motor is our second Transphorm GaN product and our second time leading an industry into the future with revolutionary power solutions,” said Kazuhiro Imanaga, General Manager of the Servo Drives Technology Department in the Motion Control Division at Yaskawa Electric. “GaN has the potential to radically change what’s possible in industrial automation systems. Yaskawa has the vision capable of driving that change. Our belief in the Q+R of Transphorm’s GaN along with our positive partnership experience with the company’s engineers enables us to fulfill that vision.”

www.transphormusa.com