If engine displacement is nothing, and magnets all: How do you recognize a good electric motor

A couple of magnets, some copper, and a shaft for transmitting power Compared with a modern Diesel or gasoline, the construction of an electric motor is surpris

If engine displacement is nothing, and magnets all: How do you recognize a good electric motor

A couple of magnets, some copper, and a shaft for transmitting power Compared with a modern Diesel or gasoline, the construction of an electric motor is surprisingly simple. In principle, the machines in the E-car are all working with similar technology. In Detail, there are but a few differences that you should know as a car buyer. A small engine for a customer.

1. So, an E-engine built in

Three types of E-machines have now in the Car by. As well as all of the work with alternating current or rotary current. All have in common is also the basic structure of a fixed magnetic Stator and a moving Rotor (or "rotor"), the ultimately the wheels of the car in motion. So he turns, he or she must have a magnetic field that is attracted by the magnetic field of the stator. Just before they meet, more wanders the field of the stator, forcing the Rotor to move further. Nio share price goes through the ceiling - the first Test of the electric SUV ES6 shows, why FOCUS Online/Wochit Nio share price goes through the ceiling - the first Test of the electric SUV ES6 shows why

2. The synchronous motor

does The most, in the meantime, the so-called permanent motor (PSM) Synchronous with the drive working in the E-car. "Permanent" because the Rotor has magnets that create a permanent field. This is not the case of the externally excited variant (FSM) of the case. the Where the magnetic field is generated temporarily by current through an electromagnet . This is in production to be significantly cheaper than the use of permanent magnets made of Rare earth, which is why this technology is cars is, especially for the more price-sensitive E-interesting. Or for those in which it does not depend on extreme driving performance. No wonder, then, that he in small cars such as the Renault Zoe was the first choice for the developers. And also the latest Smart technology is based on the. Better than the 911, Panamera and Tesla? As well the first electric Porsche FOCUS Online/Wochit Better than the 911, Panamera and Tesla? As well the first electric Porsche

Other manufacturers are looking at engines with the more expensive permanent magnets, the better Alternative is. Because in terms of efficiency and power density benefits. These points makes the permanent machine for many manufacturers of synchronous, despite the higher cost interesting. Because you, with the same battery capacity due to their sparing use of energy, greater range, and also require comparatively little space. Therefore, PSM can be found in nearly all hybrid cars, the need to bring under its tight hood, Yes a combustion engine. And also in the majority of current pure electric cars, such as the BMW i3, Porsche Taycan and VW ID.3, he comes to use.

3. The asynchronous motor

in addition to the two types of synchronous motors, there is a third variant of the E-machine: asynchronous. While in the case of synchronous motors, the magnetic fields of the Stator and the Rotor run in the same cycle, lagging behind the Rotor in the asynchronous motor (ASM) easily. the The very robust overall concept is somewhat simple, without a complicated regulation and expensive permanent magnets . In return, there is a lack of the ASM, however, of efficiency. He is also a comparatively heavy and loud. But he has one big advantage: He can at any time disable. The current is switched off, with it runs in free-running and consumes no energy. The permanent magnets in the PSM can, however, not shut down. The engine drives the car's not active, he acts instead like a Dynamo and recuperating permanently. And this is not desired, because this Form of electricity production is only efficient when the energy would otherwise go to the brakes in the Form of heat lost. When smooth sailing on the highway but that is not the case – there, the energy of movement is used. 1000 Newton meters of torque, Audi's thickest brunt brumme has three electric motors, PCP 1000 Newton metres of torque, Audi's thickest brunt brumme has three electric motors

The ASM plays, especially in the case of expensive E-Mobile for the long haul an important role. There is also another advantage: Because of the asynchronous motor can briefly work with Overload, and as a Boost effect to produce – just for the sporty-positioned E-Mobile is the premium class which is interesting. The ASM, therefore, is, among other things, in the case of the Audi E-to find Tron and Mercedes EQC. Also, Tesla uses it for Model S and X, meanwhile, in combination with the primarily off the Highways more efficient PSM. In the future should find such a kind of division of labor in the other models. However, rather in the upper price class.

4. New engine concepts

A candidate with a future in E-car could be the so-called reluctance motor, which operates according to completely different principle as the magnetically-excited-machines. He makes use of the phenomenon that every System strives for minimal magnetic resistance (Reluctance). Because of the Rotor without Permanent or electro-magnets does, is he in the production of very favorable. However, the engine is loud and a little quiet.

it looks so monotonous at first sight, is not the electric motor art. And also for the future there are likely to be even greater development steps, especially for the cost. However, all of the subtleties with engine displacement, cylinders, valve timing, injection, etc., which constitute in internal combustion engines, the fascinating differences - they are with the E-car is gone forever.

more about the future of mobility

learn compare To our E-mobility Portal efahrer.com you can find all the available on the German market, E-vehicles & Hybrid with technical data, prices, delivery times and Model. To do this, there are ongoing Insider-News, Tests, all the important vehicles, an Overview of charging stations and a range calculator.

you can arrange directly a free test drive for your dream car so easily in the E-mobility start-up.

sv/SP-X
Updated Date: 13 August 2020, 12:28

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