In previous articles or blog posts we have seen how to decide on a motor and a Variable Pace Travel (VSD) for an electric vehicle. In this post we will describe how to select a car for your electric motor. You might be seeking to:
one.Change an current car to electric operation, making use of a battery, or
2.Transform an present car to electrical procedure, utilizing the Talbot Electric grid relationship, or
three.Construct a vehicle from scratch for electric operation, making use of a battery, or
four.Construct a auto from scratch for electrical procedure, connecting to the electricity provide grid.
Whichever it is, we will demonstrate you how to go about it. Assuming that your choice is 1, you may possibly have an previous vehicle with a worn out gasoline motor that you would like to change to electrical, or you could be seeking to obtain an outdated car from a breaker’s lawn. If the latter, bear in brain that more mature technology vehicles are less difficult to perform on. Try out to locate a automobile that is moderately seem apart from for the motor, which latter will be discarded. If it appears a little bit shabby you can effortlessly have it reupholstered and repainted following conversion. Then you will have a fantastic-seeking electric powered auto that could previous you a lifetime. If you want it as a nearby runabout select a little auto. You can use a scaled-down battery and motor. Determine on the best pace that you want. That will establish the dimensions of motor. The regular mild automobile requires only 5kW to maintain a pace of 60km/h (37.three mph) on a level street. If you want to do 100km/h (sixty two.1mph) you will need to have a motor of 15kW. On my site you will find a checklist of suitable 400Hz motors ranging from 5.6kW up to 150kW. Gear motors Manufacturers My company does not promote these. If you ship me an email from my site I will tell you where you can get them.
If your choice is two you will not need a massive lithium-ion battery. Your energy will appear from the grid. In an emergency, your typical 12 volt battery will be sufficient. Whichever case you choose, the initial point is to remove the gasoline motor from the car. The gearbox (“transmission”) could be retained. On a 400Hz provide these motors rotate at speeds of eleven 400r/m to 12 000r/m, depending on load. Many of the motors are obtainable with a reduction gear. Different ratios are accessible. Select one that provides a reduction of between two:one (for a large prime speed) and four:1 (for a reduce leading velocity). Retaining the car’s first transmission will enable exceptional acceleration and the potential to climb steep hills. Some of the motors are h2o cooled. Ought to you use a single of these, retain the car’s radiator. Be part of hoses between the radiator and the motor, with an electrical water pump in among. This will supply outstanding cooling and permit the rated energy of the motor to be exceeded. It is a good idea to place thermistors in speak to with the stator windings to alert of extreme warmth construct-up. A 3-phase induction motor has an performance of ninety% or better. As a result only 10%, at most, of the enter energy is manifested as warmth. Evaluate this with a gasoline motor, which at 60km/h has an effectiveness of close to fourteen%, which means that 86% of the strength of combustion of the fuel has to be eliminated by the radiator and exhaust system. Such effective cooling will let the motor to be operated continually effectively previously mentioned its rated electricity.
If you intend creating a automobile from scratch, take into account generating the entire body of spheroidal condition, like that of the design “69zulu.” Make it in two halves in fiberglass bolstered epoxy resin and be a part of them. This will give you a extremely gentle auto with a lower drag coefficient. A 5kW motor in every single wheel fairing will give a lot more than sufficient efficiency. A five.6kW motor is only 6 inches (150mm) in diameter and 9.5 inches (241mm) lengthy and weighs only 6.8kg (15 lb). Using individual motors on each wheel eliminates the want for a differential.
In get to be ready to management the velocity of your automobile you will want a VSD. If you are an electronic whizkid you can make your very own. Or else there are numerous types accessible commercially. Unfortunately, most of the latter are for 50 or sixty hertz. If you plan to use a battery, you will require a single of about 280 volts in purchase to get two hundred volts three-section after inversion.