The electric car is going to become a widely adopted solution that guarantees a sustainable mobility with zero harmful emissions that are dangerous, especially for urban environments; this is pollution that its citizens breathe. This is why many big cities all across the world like Paris, Madrid, Athens, Mexico City are adopting the introduction of a type of car that does not pollute the air with harmful emissions: the electric car.
Pollution of the air is becoming an urgent reason for the introduction of zero-emission electric cars. (Source: The Economist)
This trend is leading to the proposal of exclusively adopting electric vehicles within these big cities by 2025. If this effort is adopted it will push the development of this technology even further by making automobiles more efficient with increased autonomy, i.e. the distance that can be travelled between two different recharges of the battery pack (in 2018 this distance is presently around 500 km).
One of the top producers worldwide of completely electric cars is the Tesla Company which produces the model S, a great example of the application of the electronics technology to the realization of the e-car. The basic core of this smart car is the asynchronous electric motor, which utilizes a DC to AC inverter to create an alternating voltage that generates a rotational magnetic field thus inducing electric currents able to set the rotor, the moving part of the motor, into motion.
The torque of the engine depends on the number of revolutions per minute, allowing a very high, up to 18000 rpm, as compared with the internal combustion motor whose speed range is 2000-4000 rpm. This fact implies that the efficiency of the electric motor is very high. (see Figure 2):
The Tesla model S basic principle of functioning is based on the electric inductive asynchronous motor (Source: YouTube/Learn Engineering)
The electronics technology contribution to the e-car project is very valuable. Let’s think, for example, of the DC/AC inverter utilized for the conversion of the DC power source, the battery pack in the electric car, to an AC power source that is the input power for the electric asynchronous motor.
The block diagram of an inverter for the generation of an AC voltage from a DC voltage power source is shown in the Figure 3 below:
An electronic circuit that realizes the conversion from a DC voltage source to AC voltage by means of a Pulse Width Modulation (PWM) integrated circuit (Source: New Mexico Tech)
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Have you ever driven an e-car? Do you think that this solution will lead to a more sustainable and comfortable transportation on tires? Is the success of this solution related to an effective and widely spread realization of the recharge infrastructure in your opinion?