Green Design

Hybrid and Electric Vehicle Test System

SAKOR Technologies, Inc. (Okemos, MI) designed and installed a complete turnkey Hybrid and Electric Vehicle Test System for UQM Technologies, Inc. (Longmont, CO), a manufacturer of high-efficiency electric propulsion systems. UQM will use the system to test inverters and traction motors for use in hybrid and electric vehicles for the automotive, commercial truck, bus, and military markets.

The system is energy-efficient and can perform all types of performance and durability cycling, including complex profiles and road load simulations. At its heart is SAKOR’s 165-kW, 12,000-RPM, AccuDyne AC Dynamometer - a 4-quadrant dyno that offers full motoring and loading capabilities. The complete system also includes a 225-kW high-voltage battery simulator, ideal for conducting research and development, performance evaluation, and durability testing of high-voltage DC power systems. The high-voltage battery test system uses a high-efficiency, line-regenerative DC power source. During discharge modes, absorbed power is regenerated back to the AC mains instead of being dissipated as wasted heat.

The test system is driven by a DynoLAB™ EM controller. The integrated test system is capable of testing complete hybrid drivelines and subsystems, with or without actual batteries in circuit. The system can be configured to provide dynamic response for such situations as voltage sags and current surges. The simulator output remains repeatable from cycle to cycle, regardless of charge state, resulting in more consistent and accurate test data.

(SAKOR)