“The electric motors are hollow
permanent magnet machines
which, together with the
concentric transmission, offer the
best power density
and efficiency and the lowest
weight: they give the I-PACE
Concept sports car performance”
Two questions come to mind:
permanent magnet machines
which, together with the
concentric transmission, offer the
best power density
and efficiency and the lowest
weight: they give the I-PACE
Concept sports car performance”
Dr Wolfgang Ziebart
Technical Design Director,
Jaguar Land Rover
Technical Design Director,
Jaguar Land Rover
Two questions come to mind:
1] Why did Jaguar chose just 2 motors. Hopefully the I-Pace will include some form of torque-vectoring but battery electric vehicles (BEVs) are all about conservation of energy hence 2 motors would imply brake-based torque-vectoring which is counter to the notion of conservation of energy. Dynamic torque-vectoring requires at least 3 motors and ideally 4; applying increased torque to the outer wheel or wheels in a turn and perhaps absorbing regenerative energy from the inside wheel or wheels. My fear is that Jaguar is holding back and what I am describing is the I-Pace 2.0. I for one barely have the funds for the I-Pace 1.0 and believe I only have the one chance to enjoy a vehicle of this ilk - I'll be choked if a 3 motors version appears in year 3 or 5. Anyone any thoughts?
2] I have read the statement by Jaguar's Technical Director above, dozens of times. I get the use of permanent magnets and can visualize the motors being internally hollow, but "What is a concentric transmission" and "How does this engineering feature - "offer the best power density and efficiency and the lowest weight""? Thoughts?
