Precision Technology was engaged by one of New Zealand’s largest bus companies to develop a traction motor controller for a new trolley bus. The project involved designing IGBT power electronics and a microprocessor based controller to deliver up to 500A to a dc 130/270kW electric traction motor. The design also included electrodynamic braking whereby the recovered energy was dissipated via a large resistor on the roof of the bus. ….more.
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