Multiport Bidirectional SRM Drives for Solar-Assisted Hybrid Electric Bus Powertrain With Flexible Driving and Self-Charging Functions

Abstract

IEEE Hybrid electric bus (HEB) presents an emerging solution to exhaust gas emissions in urban transport. This paper proposes a multiport bidirectional switched reluctance motor (SRM) drive for solar-assisted HEB (SHEB) powertrain, which not only improves the motoring performance, but also achieves flexible charging functions. To extend the driving miles and achieve self-charging ability, photovoltaic (PV) panels are installed on the bus to decrease the reliance on fuels/batteries and charging stations. A bidirectional front-end circuit with a PV-fed circuit is designed to integrate electrical components into one converter. Six driving and five charging modes are achieved. The dc voltage is boosted by the battery in generator control unit (GCU) driving mode and by the charge capacitor in battery driving mode, where the torque capability is improved. Usually, an extra dc-dc converter is needed to achieve battery charging. In this paper, the battery can be directly charged by the demagnetization current in GCU or PV driving mode, and can be quickly charged by the PV panels and GCU/AC grids at SHEB standstill condition, by utilizing the traction motor windings and converter circuit, without external charging converters. Experiments on a three-phase 12/8 SRM confirm the effectiveness of the proposed drive and control scheme

Adaptive Robust Control System for Axial Flux Permanent Magnet Synchronous Motor of Electric Medium Bus Based on Torque Optimal Distribution Method

“…The traditional electric medium bus has only one motor drive system, and the vehicle manager only corresponds to one motor controller [23], and the two are connected by controller area network (CAN) communication. Unlike conventional two-motor electric vehicle drive systems, the dual-station AFPMSM needs to control two sets of stator windings.…”

“…where in S e represents a wave function containing a fundamental wave and a 6th harmonic, K e represents a back EMF coefficient matrix. Their expressions are shown in Equations (23) and (24), respectively.…”

Multiport Driving Topology for a Photovoltaic Aircraft Light Transmission System Driven by Switched Reluctance Motors

“…However, SRMs need some more practical power converter structures in different fields and actual requirements. In [11][12][13][14][15], the topology was improved with many new topologies proposed in order to adapt to various situations. The design ideas and research methods of these topologies proposed in [11][12][13][14][15] play an important role in promoting the research of this paper.…”

“…In [11][12][13][14][15], the topology was improved with many new topologies proposed in order to adapt to various situations. The design ideas and research methods of these topologies proposed in [11][12][13][14][15] play an important role in promoting the research of this paper. The driving system designed in [11] can improve the performance of the motor, but PV panels and the generator control unit are connected in parallel; the voltage is forced to change, which is not conducive to improving the stability of the system.…”

“…The design ideas and research methods of these topologies proposed in [11][12][13][14][15] play an important role in promoting the research of this paper. The driving system designed in [11] can improve the performance of the motor, but PV panels and the generator control unit are connected in parallel; the voltage is forced to change, which is not conducive to improving the stability of the system. Paper [12] proposed a converter that uses additional inductance to increase the output torque and demagnetization voltage, but the efficiency and the power density are reduced.…”