Simple Strategy of Overmodulation in Control of Interior Permanent Magnet Synchronous Machines for Improving Efficiency in Automotive Applications

摘要

In automotive applications, efficiency of the drive train is very important due to the limitedenergy in the battery. Improvement can be achieved by increasing the inverter output voltagethrough overmodulation. This can be used for either increasing output power or reducing powerlosses.This paper presents a new strategy of voltage limitation for the current control of three-phaseelectric drives. The proposed limitation scheme allows the use of dynamic rotor-oriented currentcontrol with no modifications for operation in overmodulation range. The novel limitationstructure is described and verified through simulations and experimental results.