Electric Vehicles (EVs) develop rapidly with the concerns of gas emission and energy crisis. Electric Motors, those are used for EV propulsion must have high efficiency for maximum utilization of the energy from batteries and/or fuel cells. This paper aims to address how to achieve the optimal system efficiency of multi-motor drive system, which has not been addressed previously. Based on the measurement or estimation of the real-time load condition and the efficiency optimization strategy, Digital signal processor (DSP) coordinates the work between the two motors and setts reasonable working mode of the inverter, and then improves the overall efficiency of the propulsion system notably. Fault-tolerant strategy base on the master-slave motor concept is also discussed to ensure the reliability of the system both under health and various faulty conditions. The paper presents the details of the experimental setup and measurement for the improvement of the system efficiency. Data obtained from this study will provide the preliminary understanding on how to achieve the optimal efficiency of multi-motor drive system.
[1]
Heath Kouns,et al.
Analysis of Performance Characteristics of Electric Vehicle Traction Drive in Low Speed/Low Torque Range
,
2001
.
[2]
C.M. Stephens,et al.
Fault detection and management system for fault tolerant switched reluctance motor drives
,
1989,
Conference Record of the IEEE Industry Applications Society Annual Meeting,.
[3]
Tore Undeland,et al.
Power Electronics: Converters, Applications and Design
,
1989
.
[4]
Hossin Hosseinian,et al.
Power Electronics
,
2020,
2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES).
[5]
A. D. de Almeida,et al.
Technical and economical considerations in the application of variable-speed drives with electric motor systems
,
2005,
IEEE Transactions on Industry Applications.
[6]
Yoichi Hori,et al.
Fast efficiency optimization techniques for the indirect vector-controlled induction motor drives
,
2003
.