A Sakor Technologies dynamometer test system has been installed at Nexteer Automotive, where it will be used to analyze high-speed motors and inverters for hybrid and electric vehicles. The test rig consists of a 164kW AccuDyne four-quadrant AC dynamometer, which provides the required torque and maximum speed of 12,000rpm, and a 175kW, ±500V DC, 500A battery simulator; it is automated by Sakor’s DynoLAB test automation controller.
From a performance perspective, the dynamometer is capable of full bi-directional braking or driving of the device under test. It can provide full rated torque at stall (zero speed). It features regenerative, non-resistive power absorption, with 360Nm constant torque from stall to 4,356rpm. The dyno can generate a constant power of 164kW from 4,356-12,000rpm (continuous duty).
If needed, the test bench can be easily upgraded at a later date to support higher speeds and greater power densities.
“This new system will be extremely useful for performing design validation, as well as determining the performance and durability characteristics of various motor and inverter designs. It will contribute to the understanding of how to design hybrid and electric vehicle drivetrains that maximize efficiency and power density while making the best use of limited physical space,” said Randal Beattie, the president of Sakor.