ABB has launched a new motor and inverter package for electric buses at Busworld Turkey 2024.  The new package, featuring the first 3-level inverter for buses, enables up to 12% less motor losses on typical drive cycles compared to previous 2-level inverters, ABB states.

The new package is consisting of AMXE250 motor and HES580 inverter and is tailored for electric buses. The new solution is on display at Busworld Turkey.

ABB motor package for electric buses with 3-level inverter

The first 3-level inverter in the market for electric buses, according to ABB’s own words, the HES580 boasts superior energy efficiency and power output. The group states: “Compared to conventional 2-level inverters, the HES580 achieves a substantial reduction of up to 75 percent in motor harmonic losses, significantly minimizing heat dissipation and maximizing energy conservation. The key to this superior performance lies in its innovative 3-level architecture. Unlike 2-level inverters, which switch between two voltage levels (DC+ and DC-), the HES580 introduces a third voltage step – the neutral. This addition effectively halves the voltage step during each switching operation, resulting in reduced current ripple and subsequently lower harmonic losses. Consequently, the AMXE250 motor operates with enhanced efficiency, delivering greater performance across diverse driving conditions”.

Moreover, the HES580 benefits the AMXE250 motor by extending its lifespan and enhancing its reliability by mitigating harmonic effects and minimizing stress on motor windings.

Additionally, the AMXE250 stands out as a compact, permanent magnet synchronous motor designed for high-efficiency propulsion. The motor also offers high torque density for improved dynamic performance, as well as a quieter operation for increased passenger comfort. The HES580 and AMXE250 have been designed to offer flexibility, allowing them to be placed further away from each other, thus providing operators with the possibility to further optimize space.

David Segbers, Global Product Manager at ABB’s Traction Division said, “We’re delighted to bring the first 3-level inverter for electric buses to the market. The motor-inverter package has been designed to work in perfect harmony and will bring significant energy efficiency gains for operators and OEMs alike.”

Global Head of Mobile e-Power at ABB, Fabiana Cavalcante said “Electrifying buses in this way is a key part of bringing sustainable, clean public transport that improves the quality of life. We’re thrilled to provide future-proof solutions that helps the industry to meet their sustainability and performance objectives.”


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