E for Engineer

Charging a Detroit Electric car, 1919. An electric car is powered by an electric motor instead of a petrol engine. The electric motor gets energy from a controller, which regulates the amount of power—based on the driver’s use of an accelerator pedal. The electric car (also known as electric vehicle or EV) uses energy stored in its rechargeable batteries, which are recharged by common household electricity. Thus an electric vehicle will have three basic components : Energy Storage Unit Controller Propulsion system The energy storage unit will have a way to store power.  A chemical battery is the most common energy storage technology currently, although it can be different - for example - A fuel cell (which gets its electricity from hydrogen rather than a battery pack), can be used instead of a chemical battery as the energy storage unit. The controller acts as a pipeline or gateway to the electric motor..  The controller will do other things too - it moderates the power, w

Battery Pack Capacity Calculations The importance of a battery pack in the electric vehicle power train system is equally important to motor. If the motor provide torque to drive EV than battery pack is the source of power. The travel range of any electric vehicle is completely depends on the battery pack capacity. It's a big confusion to decide the battery pack capacity to get the desired travel range. Normally people considering battery pack capacity on some assumptions which caused the overrated or underrated capacity. In cases they will suffer higher investment or low travel range respectively. So how to calculate the battery pack capacity to get desired travel range in your EV. Before starting the battery pack capacity calculation it's required to understand some variable factors of battery power consumption. 1. Motor  Normally the motor used in EV is bldc specially in ebike. Although the efficiency of bldc motor is quite good ranging from 70-86%. How ever it

  Selection of motor for EV An Electric motors are the most important part of all power train system used in electric vehicles. T hus its make the electric vehicle motor selection very critical to get desired performance form EV. In current scenario we use many types of electric motors for Evs like electric cars, erickshaw, e bike etc as per their applications. Commonly  motors used in electric vehicles are broadly classified as AC Motors DC Motors AC Motors or Alternate current motors: Most popular form of AC motors used in electric vehicles is  3 Phase permanent magneto AC Induction motors. This motors most popular and most a preferred choice between various types of motor used in electric vehicle. All most all  electric car manufactures. because of their specific features well suited to electric vehicles: Very high efficiency  88% to 96% These motors is very compact in size Light in weight Low maintenance required thus high durability and reliability. Draw Back: Low availab