Novel motors and controllers for high-performance electric vehicle with four in-wheel motors

Terashima, Masayuki; Ashikaga, Tadashi; Mizuno, Takayuki; Natori, K.; Fujiwara, N.; Yada, M.

doi:10.1109/41.557496

Cited by 119 publications

(51 citation statements)

References 2 publications

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“…The use of electric power also facilitates the vehicle drive train design to have various possible configurations, such as front-wheel driven, rear-wheel driven, both front and real-wheel driven or four-wheel driven as shown in Fig.1. Each topology has its advantages and disadvantages in respect of performance, safety, reliability and cost [2,3]. Considering safety, multiple-motor configuration may provide redundancy to improve reliability and fail-safe operation.…”

Section: Introductionmentioning

confidence: 99%

Torque distribution strategy for a front and rear wheel driven electric vehicle

Yuan¹,

Wang²,

Colombage³

2012

6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)

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Electric vehicles (EVs) with a distributed drive train configuration offer great potential and flexibility for improving the system efficiency, performance, reliability as well as safety. This paper investigates a torque distribution scheme for a front and rear wheel driven EV in order to improve the drive train efficiency over a wide torque and speed range as a part of the EU funded P-MOB project. It has been shown the maximum efficiency is achieved if the total torque required by the vehicle is shared equally between the two identical motors. In addition, the distribution of the energy consumption over a New European Driving Cycle (NEDC) is analyzed and the regions of high speed, low torque are identified to have a high level of energy consumption, where the motor efficiency improvement in these regions is the most important. Therefore, this paper further proposes to operate just one motor to provide the total required torque in the low torque region. A clutch may be employed between one motor and gearbox (differential), thus "switching off" its idle loss (no-load loss, flux-weakening loss), and improving the drive train efficiency. An online optimized torque distribution algorithm has been devised based on the motor efficiency map to determine whether the second motor should be disengaged by the clutch in the low torque region. With the proposed optimization scheme, the drive train efficiency can be improved by 4% over the NEDC cycle. Experimental test results validate the proposed torque distribution strategy.

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Section: Introductionmentioning

confidence: 99%

Torque distribution strategy for a front and rear wheel driven electric vehicle

Yuan¹,

Wang²,

Colombage³

2012

6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)

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“…Environmentally-friendly vehicles such as electric vehicle (EV) or hybrid electric vehicle (HEV) have been developed in automotive industry [1][2][3][4]. Power trains of these vehicles have several permanent magnet motors (PMSMs) to improve the efficiency of the drive system.…”

Section: Introductionmentioning

confidence: 99%

A Novel Three-level inverter which can drive two PMSMs

Haruna¹,

Hoshi²

2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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This paper proposes new three-level inverter having two three-phase output ports for EV and HEV. The proposed inverter can drive two PMSMs independently with three-level phase voltage. In addition, the proposed inverter can reduce the number of the switches in comparison with the conventional two three-level inverters. In this paper, the circuit configuration and operating principle are presented. In addition, the operation of the proposed inverter is demonstrated by the simulation results.

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“…However, the EV drive system mainly operates in torque-control mode and the speed functions only in an auxiliary role. Therefore, torque performance, including steady-state response and dynamic response, is important for the EV drive system [11], [30]. Although a DTC scheme has good robustness, factors such as inverter dead-time and flux observer can still affect the system, particularly at low speeds [14], [19].…”

Section: Introductionmentioning

confidence: 99%

Torque-Angle-Based Direct Torque Control for Interior Permanent-Magnet Synchronous Motor Drivers in Electric Vehicles

Qiu¹,

Huang²,

Bu³

2013

Journal of Power Electronics

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A modified direct torque control (DTC) method based on torque angle is proposed for interior permanent-magnet synchronous motor (IPMSM) drivers used in electric vehicles (EVs). Given the close relationship between torque and torque angle, proper voltage vectors are selected by the proposed DTC method to change the torque angle rapidly and regulate the torque quickly. The amplitude and angle of the voltage vectors are determined by the torque loop and stator flux-linkage loop, respectively, with the help of the position of the stator flux linkage. Furthermore, to satisfy the torque performance request of EVs, the nonlinear dead-time of the invertor caused by parasitic capacitances is considered and compensated to improve steady torque performance. The stable operation region of the IPMSM DTC driver for voltage and current limits is investigated for reliability. The experimental results prove that the proposed DTC has good torque performance with a brief control structure.

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Novel motors and controllers for high-performance electric vehicle with four in-wheel motors

Cited by 119 publications

References 2 publications

Torque distribution strategy for a front and rear wheel driven electric vehicle

Torque distribution strategy for a front and rear wheel driven electric vehicle

A Novel Three-level inverter which can drive two PMSMs

Torque-Angle-Based Direct Torque Control for Interior Permanent-Magnet Synchronous Motor Drivers in Electric Vehicles

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