Working Principle of an Electric Car

How does an Electric car work – No Carbon dioxide emission

From outside most electric cars look exactly like fossil fuel-powered cars. An electric car lacks a tailpipe and gas tank, but the overall structure is basically the same. Under the bonnet, instead of a huge engine all you will see is an electric motor and its controller. The electric motor needs no oil, no tune-ups, and since there is no tailpipe emissions, it does not necessitate any smog checks.

 

electric car

 

The electric vehicle power source is the battery which acts as a “gas tank” and supplies the electric motor with the energy necessary to move the vehicle. This gives the car acceleration. When the vehicle is idle there is no electrical current being processed, so energy is not being used up. The controller acts as a regulator, and controls the amount of power received from the batteries so the motor does not burn out. This battery powers all of the electronic devices in the car, just like the battery in a gas-powered car. Everything else in the electric car is basically the same as its gas-powered equivalent: transmission, brakes, air conditioning, and airbags. Since electric vehicles use an electric motor, the driver can take advantage of the motor’s momentum when pressure is applied on the brakes. Instead of converting all the potential energy in the motor into heat like a fossil fuel-powered car does, an electric car uses the forward momentum of the motor to recharge the battery. This process is called regenerative braking.

Advantages of an Electric car

There are many environmental benefits and personal benefits for having an electric car:

  • Most electric motors can travel up to 150 – 180 km before they need to be charged
  • No tail pipe exhaust means no greenhouse gases such as CO2, NOx and PM10s
  • No oil consumption means less reliance on fuel
  • Cars can be recharged whenever is convenient to the user
  • More cost-effective than regular cars because of long-lasting battery use
  • Cheaper to maintain because they have fewer moving parts
  • Creates less noise pollution because the engine is silent

 

References

Tesla Semi – detailed information about Tesla vehicles and technology

Semi

The Tesla Semi will deliver a far better experience for truck drivers, while increasing safety and significantly reducing the cost of cargo transport.

Semi

Unrivaled Performance

Without a trailer, the Tesla Semi achieves 0-60 mph in five seconds, compared to 15 seconds in a comparable diesel truck. It does 0-60 mph in 20 seconds with a full 80,000-pound load, a task that takes a diesel truck about a minute. Most notably for truck drivers and other travelers on the road, it climbs 5% grades at a steady 65 mph, whereas a diesel truck maxes out at 45 mph on a 5% grade. The Tesla Semi requires no shifting or clutching for smooth acceleration and deceleration, and its regenerative braking recovers 98% of kinetic energy to the battery, giving it a basically infinite brake life. Overall, the Semi is more responsive, covers more miles than a diesel truck in the same amount of time, and more safely integrates with passenger car traffic.

Driver Experience

Unlike other trucks, the Semi’s cabin is designed specifically around the driver, featuring unobstructed stairs for easier entry and exit, full standing room inside, and a centered driver position for optimal visibility. Two touchscreen displays positioned symmetrically on both sides of the driver provide easy access to navigation, blind spot monitoring and electronic data logging. Built-in connectivity integrates directly with a fleet’s management system to support routing and scheduling, and remote monitoring. Diesel trucks today currently require several third party devices for similar functionality.

Megachargers, a new high-speed DC charging solution, will add about 400 miles in 30 minutes and can be installed at origin or destination points and along heavily trafficked routes, enabling recharging during loading, unloading, and driver breaks.

Safety

The Tesla Semi’s all-electric architecture is designed to have a higher safety standard than any other heavy-duty truck on the market, with a reinforced battery that shields the Semi from impact and gives it an exceptionally low center of gravity. Its windshield is made of impact resistant glass. Jackknifing is prevented due to the Semi’s onboard sensors that detect instability and react with positive or negative torque to each wheel while independently actuating all brakes. The surround cameras aid object detection and minimize blind spots, automatically alerting the driver to safety hazards and obstacles. With Enhanced Autopilot, the Tesla Semi features Automatic Emergency Braking, Automatic Lane Keeping, Lane Departure Warning, and event recording.

Tesla Semi can also travel in a convoy, where one or several Semi trucks will be able to autonomously follow a lead Semi.

Reliability

With far fewer moving parts than a diesel truck – no engine, transmission, after-treatment system or differentials to upkeep – the Tesla Semi requires significantly less maintenance. Its battery is similar in composition to the batteries of Tesla energy products and is designed to support repeated charging cycles for over a million miles, while its motors are derived from the motors used in Model 3 and have been validated to last more than one million miles under the most demanding conditions.

Lowest Cost of Ownership

All-in, the Tesla Semi delivers massive savings in energy costs, performance, efficiency and reliability.

The biggest immediate cost-advantage comes from savings in energy costs: fully loaded, the Tesla Semi consumes less than two kilowatt-hours of energy per mile and is capable of 500 miles of range at GVW and highway speed, accommodating a wide range of shipping applications given that nearly 80% of freight in the U.S. is moved less than 250 miles. Coupled with the low and stable nature of electricity prices – which average $0.12/kWh in the U.S. and can be significantly less for commercial and industrial users, falling to almost nothing when combined with local solar generation and storage – owners can expect to gain $200,000 or more in savings over a million miles based on fuel costs alone.

Reservations for the Tesla Semi can be made for $20,000 USD per truck. Production in 2019.

Reference

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