Product Details Supplier Info More products

WEG is supplying lighter traction motors that are said to save more than 400kg in weight on the latest generation of trolleybuses.

The buses employ the traction motor and a matched inverter on their differentials to increase power, reduce weight and improve economy.

For large cities, where mass transit is indispensable, trolleybuses provide a solution that saves energy and improves the environment as a result of reducing air pollution.

Trolleybuses do not release the particles that arise from combustion engines; they also provide a more comfortable travelling experience as they are quieter than conventional buses.

WEG said it has improved the trolleybus technology by introducing a new type of traction motor.

Providing power up to 185kW, the three-phase motor is enclosed in a cast water-cooled housing; it is very light and compact, providing a saving in motor weight of 400kg for trolley bus operators.

The traction motor is the result of WEG partnering with trolleybus manufacturers such as Busscar, Tutto, Eletra and Ibrava, as well as providing engineering resources to develop and optimise the hardware and software involved in each project for each manufacturer.

The motor is the central component in a powertrain developed by WEG, which also includes microprocessor-controlled vector frequency inverters with integrated PLCs.

The WEG traction motor and vector inverter (CFW09 rated at 600A) combination provides a powertrain powerful enough to make a bus ‘spin its tyres’ on starting out, according to the company.

However, for normal operations, the maximum system torque is limited to avoid unnecessary wear.

The traction system also integrates a ‘generator group’ (alcohol or gas), which feeds a battery bank.

This is responsible for supplying power to the traction system and for the auxiliary services of the bus.

Although generally single units, trolleybuses of the type described above can be expanded to bi-articulated, with two bellows.

In these vehicles, it is possible to transport up to 300 people, with the environmental benefits of emitting 80 per cent fewer pollutants than conventional systems and consuming 50 per cent less fuel.

WEG Electric Motors

View full profile