Efficient Electric Motor
Electric motor is the prime drivetrain of the car. When compared to conventional engines, it is believed that the motor is much more efficient and cost-effective especially when it comes to city driving.
The motor is a 3-phase AC induction motor that offers a maximum torque of 52 Nm at zero speed and enables the car to run at a high speed of 8000 RPM (Revolutions per Minute). When the motor is in use it transforms the energy stored in the power house of the car into kinetic energy and moves the car wheels. The power from the high torque motor is delivered to the wheels through the trans-axle and this in turn propels the car. The energy that is released while braking is regenerated to recharge the power house of the car or the Power Pack. The electronic regenerative braking ensures high level of reliability and safety.
Impressive Power Pack
Power Pack is another great innovation in the ‘Made in India’
electric car Reva. This is an advanced system that comprises eight 6-Volt lead acid batteries. The batteries fitted in the Power Pack have the power of attaining 80% state of charge in less than 2.5 hours.
Complete charge in the batteries is attained in about eight hours and it gives a range of almost 80 km. The Power Pack is the main power house of the Reva that is positioned beneath the front seats. This placement of the Power Pack lowers the centre of gravity, provides high stability, and improves maneuverability. This further ensures enhanced safety of car passengers. To charge the Power Pack, the owner of the car just needs to plug in the car into a 220 volt, 15 ampere socket at any place whether at home, office, or a mall. In full charge condition, the Reva delivers top speed by consuming only 9 to 10 units of electricity.
Master Controller
Master controller of the Reva is the innovative and advanced computerized Motor Controller. This controller actually regulates the energy flow between the Power Pack and the electric motor. When the driver applies pressure on the accelerator, the controller reads the amount of pressure applied and in accordance regulates the flow of energy transferring from the Power Pack to the Motor. This actually plays a critical role in ensuring perfect speed control and optimum use of energy irrespective of the directions.
Powerful Charger
Reva is equipped with an on-board charger to ensure safety of its passenger in case of any voltage fluctuation. The main function of the on-board charger is to convert AC into DC power and this DC power is further used to charge the Power Pack.
The working and efficiency of the on-board charger is mainly controlled by the computer unit installed in the car along with an in-built stabilizer and auto shut-off mechanism. The in-built stabilizer prevents the car from rolling at sharp turns and the auto shut-off mechanism ensures safety of passengers. The smart charger output is smartly connected to the Power Pack in a way that it ensures optimum current and voltage at all times.
Brain of Reva
The actual technology that drives the Reva and makes the car a global hit is the Energy Management System (EMS). This advanced technology is believed to be the brain of Reva.
It is a computer based system that helps to optimize charging and energy output of car’s batteries. This in turn ensures improved performance and optimized operating range. The system computes the state of charge and displays the information to the driver through a fuel gauge.
The EMS performs five key functions in the Reva that directly improves performance and reduces the running cost. The key functions of the EMS include estimation of state of charge, diagnosis of vehicle, verification of battery warranty, and vehicle data acquisition.