Analys och utredning av hjulmotorer/kontrollsystem samt SotA inom det valda området ur ett elektromekaniskt perspektiv

Precer Group is a Swedish company that develops and provides technological solutions to produce electricity by burning solid fuels. Precer has developed a unique system based on an adaptive technique for charging different kinds of hybrid vehicles such as cars, trucks, utility vehicles and boats but, also for housing in the form of electricity generation. They have a patent on a heat engine that drives a generator that charges the battery.Precer Group also has collaboration with the European Space Agency (ESA) in which they are working together to develop new types of powertrains and fuels to create very environmentally friendly hybrid vehicles that do not run on fossil fuels.We have been working together with Precer Group to try to determine how todays technology with wheel motors and the motor controls can be implemented in this specific concept vehicle and also see how the problem that exsist with this tecnology e.g. unsprung weight, power and controlfunctions and systems can be solved. We have concentrated on finding out the best performance for in-wheel motors and the best functionality, safety and usage of motor controllers available on the present market.We received a list of specifications from Precer that we adhered to when we checked and analyzed different manufacturer’s motors. The reason behind attempting to use wheel motors, in oppose to more conventional motors, is weight reduction. By using wheel motors we are able to omit axels and gearboxes, thereby reducing the total weight of the vehicle which must be kept within a maximum limit. Another reason is that the use of in-wheel motors gives possibilities to implement smart electrical systems to control the motors and the vehicle through CAN buses. This leads to faster and more complex steering of the vehicle to improve the efficiency, stability and safety. Precer also specified the use of four separate wheel motors in order to utilize a four-wheel drive concept. We have compared the performance of the various motors and controllers available, and we have concluded which motor best suits this vehicle. Through physical calculations and functional comparisons of data that we have received from some of the leading companies we have come to results that show that systems which integrate the in-wheel motors and the controllers demonstrate a better performance when it comes to acceleration and climb ability. Also their functionality is considerably higher than the systems that integrate in-wheel motors with a universal controller. Although it’s able to configure the universal controllers considerably more and so make it possible for the user to personalize the system by desire.