OKOFEH - Optimised components for electric driven and hybrid vehicles
Overview
Background & policy context:
At the beginning of the 1990s, politicians and the general public called for the use of electric drives in motor vehicles. It is, in principle, possible to operate these vehicles without emissions at the place of use. The challenge is to provide these vehicles with sufficient electrical energy on board.
Objectives:
The state of the art for electric drives for road vehicles has been - and still is - the three-phase induction motor, whether with a synchronous or asynchronous machine. Although the efficiency achieved with three-phase drives can be described as very good - depending on the operating point of the machine the efficiency is between 80 and 90% - there is still an potential for improvement here. This also applies to the transverse flux motor (TF) and the switched reluctance machine (SR).
The following project objectives have been defined:
SR technology:
- Demonstration of the functionality of SR technology for road vehicles
- Reaching the technical characteristics of synchronous / asynchronous drives
- Showing the cost advantages of SR technology.
TF technology:
- Demonstration of the functionality of TF technology for road vehicles
- Validation of the improved efficiency against existing synchronous / asynchronous drives
- Minimization of the costs by using powdered iron materials in the stator
- Validation of improved efficiency in generator operation versus existing generators
- Demonstrating the resulting emission and fuel consumption advantages for serial hybrid vehicles
Methodology:
In order to achieve these project objectives, the following project content was agreed:
SR technology:
- Development, design and testing of a prototype
- Testing the prototype on the test bench
- Installation and testing of the prototype in a vehicle
TF technology
- Development, design and testing of a propulsion prototype
- Testing the propulsion prototype on the test bench
- Installation and testing of the propulsion prototype in a vehicle
- Development, design and test of a generator prototype
- Construction of an APU (Auxiliary Power Unit) with TF generator
- Test of the APU
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