METHOD AND SYSTEM FOR USE IN DYNAMOMETER TESTING OF A MOTOR VEHICLE

摘要

The present invention relates to a method for use in dynamometer testing of a vehicle (100), the vehicle (100) including at least a first wheel shaft and at least one first vehicle power source for providing power to said first wheel shaft, said first wheel shaft being connected to a vehicle dynamometer system, said vehicle dynamometer system comprising a first controllable dynamometer power source (201) for providing power to said first wheel shaft, said first dynamometer power source being an electrical machine (201) comprising a stator and a rotor, said stator comprising a stator winding. The method includes: determining whether a first temperature (T1) is below a first temperature limit (Tlim1), and heating said electrical machine (201) by applying a current (Iheat) to said stator winding when said first temperature (T1) is below said first temperature limit (Tlim1).

主权项

1. Method for use in dynamometer testing of a vehicle, the vehicle including at least a first wheel shaft and at least one first vehicle power source for providing power to said first wheel shaft, said first wheel shaft being connected to a vehicle dynamometer system, said vehicle dynamometer system comprising a first controllable dynamometer power source for providing power to said first wheel shaft, said first dynamometer power source being an electrical machine comprising a stator and a rotor, said stator comprising a stator winding and said method including:
determining whether a first temperature (T1) is below a first temperature limit (Tlim1), and heating said electrical machine by applying a current (Iheat) to said stator winding when said first temperature (T1) is below said first temperature limit, said electrical machine being an asynchronous three-phase induction machine, and wherein said current (Iheat) is a current having a frequency such that the rotational speed of said rotor is kept below a first speed.