Efficient Power Electronic Inverter Control developed in an automotive Hardware-in-the-Loop Setup 2019-01-0601
Hardware-in-the-Loop is a common and established testing scenario for automotive developments in order to study interactions between different vehicle components during the early development phase. Hardware-in-the-Loop setups have been utilized to a variety of electrified drivetrains already. However, there is a particular lack of studies concerning inverter control strategies considering entire vehicle drive cycles. This contribution can be a first step to close this gap. Here, the inverter control for an interior permanent magnet synchronous machine is developed utilizing space vector modulation, overmodulation and six-step operation. The inverter control is implemented in such a way that an efficiency analysis of the power electronic inverter as well as for the interior permanent magnet synchronous machine is performed at a laboratory test bench. Based on these measurements, an efficient control strategy with respect to the inverter operation is realized for this setup. A real-time vehicle dynamic simulation with a battery operated electric drivetrain is developed and driving resistances of the vehicle dynamic simulation are verified employing vehicle measurements based on defined coast down tests. The vehicle dynamic simulation is combined with the inverter control and the test bench components to a Hardware-in-the-Loop setup complying with real-time conditions. The implemented inverter control is tested during the worldwide harmonized light vehicles test cycle (WLTP Class 3). The interactions between the vehicle dynamic behavior and the electric drivetrain are analyzed and the results will be discussed in the full article. This discussion will show the methodology in which way a Hardware-in-the-Loop setup is able to accelerate the development process for automotive applications.
Konstantin Etzold, Claas Kürten, Andreas Thul, Lukas Müller, René Scheer, Max-Arno Meyer, Christian Granrath, Michael Schröder, Kay Hameyer, Jakob Andert