New Motor-Generator From TM4

By Mike Brezonick10 October 2017

TM4, the Canadian manufacturer of electric motors, generators, power electronics and control systems for commercial, automotive, marine, mining, rail, motorsports and recreational vehicle applications, has announced the expansion of its Sumo family of electric powertrains. The new Sumo HP line is dedicated to high-power applications and as part of the new line, TM4 is launching the Sumo HP HV900, a new motor/generator and inverter combination for the commercial heavy-duty market.

The Sumo HP HV900 offers 190 kW/254 hp of continuous power and 915 Nm/675 lb. ft. of torque in a casing 200 mm/7.87 in. long. It was purposely developed for series and parallel-hybrid configurations and can be coupled with diesel engines, multi-speed gearboxes or integrated to axles for ultra-low floor buses. The new motor/generator incorporates TM4’s three-phase CO150 inverter, which is used in thousands of vehicles worldwide, the company said.

“Several applications relying on long range and low downtime are not yet suitable for complete battery-based operation without significant infrastructure or battery technological breakthrough,” said Eric Azeroual, Sales and Customer Service director at TM4. “Therefore, our offering of a compact and efficient gen-set is a valuable asset to enabling electrification in urban delivery trucks, inter-city buses and even long-haul trucks.”

TM4 said the efficiency of the system reaches 95% and has been developed to match the efficiency of a diesel engine to optimize fuel savings. In a series hybrid, the combined use of the electric traction system, the optimized gen-set and electrified accessories can result in a minimum of 50% in fuel economy compared to a conventional diesel-powered vehicle, the company said.

The Sumo HP HV900 is currently being used as part of the plug-in hybrid powertrain system developed in a joint effort with Cummins.

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