VW reveals the engineering of the new APP550 electric motor for the ID models

Apr. 13th, 2023, 10:20 AM GMT
Ilie Toma
It is still unusual for a car manufacturer to announce the launch of a new motor, and for it to be an electric one with few components, which is not talked about in the same way that a new TDI or TSI used to be. But this is the era we live in, already, and we should get used to such releases. VW last night revealed the engineering of a new electric motor for the ID family of electric models, and the electric motor is called the APP550.
The figure of 550 in the name comes from the maximum torque of 550 Nm of which the electric motor is capable, but this torque depends on the gear ratio on the single-speed gearbox of each car where it will be installed, so there will also be versions with lower torque. The engine housing and the points where the traction transmission elements are located are designed for compatibility with the MEB platform of the VW group, used by a large part of the electric models of the ID family, as well as models such as the Skoda Enyaq or the Cupra Born. Also, the new engine will be found on the rear-wheel drive versions, not with all-wheel drive for now, and it seems that the explanation is hidden in its cooling.
Thus, if in the VW engines until now the cooling was done with an internal electric pump, which directed the oil around the key components, now in the cooling compartment there will be a switchable pump, which will be directly operated by the axle of a wheel in the gearbox. The gearbox has 3 axes, and the second one has a continuation inside the cooling compartment, adjacent to the gearbox compartment. It is equally curious that that pump will direct, through solenoids that will allow electronic activation and deactivation, two circuits, an internal one of oil, which will cool the engine, and another of coolant, which will be cooled by the main radiator of the car and will be an auxiliary part of the battery cooling system, also working together with the air conditioning in the passenger compartment.
It is curious, therefore, that with increasing powers, such as the 286 HP produced by the new engine, and with their ever more compact forms, real life shows that a more efficient cooling of the electric motors is needed if they are to can deliver consistent performance, and these needs, along with the need for cooling and/or heating of the battery, can gradually begin to drive the need for larger radiators on the front of electric cars, and thus lead us back to grilles like those of on cars with internal combustion. However, any heat emitted by a mechanical component means energy loss, so these heat emissions must be kept to a minimum, or counterbalanced among themselves, to maintain efficiency in consumption. In the case of this system, it was made decoupleable precisely because the need to cool the electric motor occurs sporadically, and the rest of the time the pump will be decoupled, it will not produce resistance and energy loss for the gearbox and will, thus, bring increased efficiency in consumption.
The APP550 motor also boasts an inverter much more capable of providing it with consistent high voltage and much finer in directing the electric motor. The new motor will initially appear, most likely, on the new VW ID.7, which will have its premiere in a few days, and which will be a kind of electric successor of the Passat.
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