PML’s In-Wheel Motor, Plug-in Series Hybrid MINI
25 August 2006
|The MINI QED.|
PML Flightlink and its partner Synergy Innovations recently unveiled an in-wheel, plug-in series hybrid conversion of a MINI at the British Motor Show, the MINI QED. The car, one of two the partners have so far produced, serves as a testbed and demonstrator for technologies the company—which designs and manufactures electric motors, joysticks and drive systems—hopes to commercialize.
The QED currently uses four 750 Nm brushless permanent motors in its wheels, a 21 kWh lithium-polymer battery pack and a 250cc two-cylinder, four-stroke engine as the genset. The QED supports an all-electric range of 200-250 miles and has a total range of about 932 miles (1,500 km). The car accelerates from 0-62 mph in less than 5 seconds.
The QED uses a 350V, 11 Farad ultracapacitor to discharge the high current for acceleration and to accept the regen power back from braking. This protects the batteries from high current spikes.
PML is working on the engine component and may change it in the near future. Emission testing is part of that process.
The driver can specify an all-electric Eco mode in which the engine will not start unless directed by the operator. In the normal operating mode, the engine starts when the battery drops to a 50% state of charge (SOC). A third mode—sport—offers an enhanced performance profile on top of the normal mode.
Anti-skid and traction control capabilities are built into each wheel. The anti-skid function dynamically monitors each wheel to detect the onset of skid onset, and then manages the system to obtain maximum non-skid torque from the wheel in either acceleration or braking modes. Traction control dynamically distributes torque when any wheel is in skid management mode.
An option provides steering wheel feed-forward input to the traction control system, allowing driver in tent and wheel alignment to influence stability and traction. Another option would provide further stability input through attitude, yaw and gyroscopic sensors.
PML FlightLink has also developed a prototype electric scooter—the PRAZE project—with European partners including Peugeot and with support from the European Commission.
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PML Flightlink and its partner Synergy Innovations recently unveiled an in-wheel, plug-in series hybrid conversion of a MINI at the British Motor Show, the MINI QED. The car, one of two the partners have so far produced, serves as a testbed and demonst... [Read More]