Wednesday, October 29, 2008

Electric Cars

An alternative of fuel car that shows up in the news all the time is electric car. It is a type of car that utilizes electric motors and motor controllers instead of an internal combustion engine (ICE) or gasoline engine.

There are a lot of differences between gasoline and electric cars:

  • The gasoline engine is replaced by an electric motor.
  • The electric motor gets its power from a controller.
  • The controller gets its power from an array of rechargeable batteries.
  • A gasoline engine, with its fuel lines, exhaust pipes, coolant hoses and intake manifold, tends to look like a plumbing project. An electric car is definitely a wiring project


Other examples of rechargeable electric vehicles are ones that store electricity in ultracapacitors, or in a flywheel. Vehicles using both electric motors and other types of engine are known as hybrid electric vehicles and are not considered pure electric vehicles (EVs) because they operate in a charge-sustaining mode. Hybrid vehicles with batteries that can be charged externally to displace are called plug-in hybrid electric vehicles (PHEV), and are pure battery electric vehicles (BEVs) during their charge-depleting mode. Electric cars or vehicles include automobiles, light trucks, and neighborhood electric vehicles.

Electric car using DC motor


A simple DC controller connected to the batteries and the DC motor. If the driver floors the accelerator pedal, the controller delivers the full 96 volts from the batteries to the motor. If the driver take his/her foot off the accelerator, the controller delivers zero volts to the motor. For any setting in between, the controller "chops" the 96 volts thousands of times per second to create an average voltage somewhere between 0 and 96 volts.

Electric car using AC motor


An AC controller hooks to an AC motor. Using six sets of power transistors, the controller takes in 300 volts DC and produces 240 volts AC, 3-phase. The controller additionally provides a charging system for the batteries, and a DC-to-DC converter to recharge the 12-volt accessory battery.

Video of electric car vs Ferrari

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