Inverters are a critical component of most electric drive systems, providing the high-frequency switching and control needed for the vehicle's main drive motor. Siemens ELFA inverters have evolved over the past 20 years, taking advantage of the latest insulated gate bipolar transistor (IGBT) technology, and offering higher performance and lower cost with each succeeding generation.

Siemens inverters.

The Siemens inverters used in TransPower's first generation electric drive system are shown at left. Use inverters built by the same manufacturer that supplies the main drive motor reduces the likelihood of problems related to motor-controller integration - an issue that undermines the success of many electric vehicles. TransPower partner ISE possesses a decade of experience in programming Siemens inverters to provide seamless control to truck operators, emulating the “feel” of a diesel truck while offering improved acceleration and a smoother ride, will help accelerate market acceptance of this technology.

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