What is the Principle of Electric Trams?

[AdelynAnn]

The electrical energy driving electric trams comes from DC traction substations. It enters the tram body through overhead contact wires installed along the streets and current collectors (trolley poles or pantographs) mounted on the tram roof. The current passes through power switches like air circuit breakers and voltage regulation devices to drive the tram's traction motors, then returns to the traction substation. Below is an extended introduction: Electronic transmission (commonly called e-transmission): This transmission has a "current boosting effect", using "FET tubes" to increase current and enhance speed. Advantages: The greatest advantage of this transmission device is its ability to boost current while maintaining excellent linear current output.

[DeConnor]

The principle of electric vehicles is essentially using battery power to drive an electric motor, which in turn rotates the wheels. Think of the battery as a large power source storing electrical energy. When you press the accelerator, electricity flows to the motor, which starts spinning and drives the wheels forward. The controller adjusts speed and power output to ensure smooth driving. A key highlight is regenerative braking: during braking, some kinetic energy is converted back into electricity to recharge the battery, saving energy and extending range. The overall structure is simple, without complex components like internal combustion engines or transmissions, yet it offers high reliability and low noise.

[OSpencer]

I think the principle of driving an electric car is quite straightforward: after fully charging, you press the accelerator to start, and the motor draws power directly from the battery to drive the wheels. The acceleration is incredibly smooth, without any jerking, because the motor responds instantly, unlike gasoline cars that require gear shifts. Daily use is convenient—just plug in to charge—but you need to pay attention to battery life, as standard lithium batteries may lose some capacity after a few years. Maintenance is simpler, with no need for oil changes, though tire wear might be a bit faster due to the heavier weight of the car.

[SanMiranda]

Electric vehicles primarily operate on batteries and electric motors: After charging, the battery supplies current to the motor, which rotates to propel the car. The system automatically manages speed, operating quietly and efficiently while emitting fewer pollutants than traditional vehicles.

[CollinRose]

From an environmental perspective, the principle of electric vehicles makes travel more sustainable: the battery powers the electric motor, significantly reducing carbon dioxide emissions. Although the electricity may come from non-renewable sources, the high efficiency, coupled with regenerative braking energy recovery, allows for a long-term transition to solar or wind power charging, achieving near-zero pollution. This promotes clean transportation.