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Parker Hannifin drive for Ikarus-built Modulo concept bus

Parker Hannifin is working with Hungarian engineering solutions firm evopro to provide an electro-hydraulic drive solution for the new zero-emission Modulo concept urban bus manufactured in Budapest by Ikarus.

The lightweight composite-body buses are designed to be easily adapted for different passenger capacities and various drive technologies, including full-electric.

The designers have specified Parker’s GVM permanent magnet AC motor combined with a low noise electro-hydraulic pump to control the steering. The torque density and speed capabilities of the PMAC motors, combined with a voltage matched inverter, provide the speed and torque required to achieve the required performance while offering high energy efficiency, according to Parker. 

The PMAC motor and EHP are controlled by an intelligent mobile inverter drive, which provides real-time speed/torque commands and enables the use of traditional hydraulic-pump flow/pressure control architectures.

Since May 2016, 20 electric buses have been supplied to Budapest Public Transport and the Modulo has won a number prizes, including a JEC 2016 Innovation Award for Urban Transportation. 

The Modulo also successfully participated in the 2016 80-edays ELDURO endurance test for electric vehicles across 20 countries and three continents.

“This example of collaborative technical innovation is leading the way for the development of viable zero-emission urban transportation systems,” says Laszlo Kozak, sales engineer, Parker Hannifin. “Parker’s PMAC motor technology and low-voltage electro-hydraulic pump have substantially contributed to the Modulo’s excellent overall energy efficiency.”

www.parker.com/uk