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In this paper, a method of restraining the cogging force in tubular permanent magnet linear motor with multi-segment primary based on primary iron-cores shifting is proposed, the mechanism of weakening cogging force in tubular permanent magnet linear motor with primary iron-cores shifting is analyzed based on the energy method., and the formula of arranging the primary iron-cores are appropriately...
For electric vehicle applications, the AC inverter used for the electric propulsion drive has to be dimensioned for a sufficiently long lifetime and high reliability. During start-up processes the semiconductors are mostly stressed which has a negative effect on this reliability. With the help of active thermal controllers, these critical states can be reduced by a temporary adaption of the switching...
This paper deals with the relative wavelet energy as a diagnosis tool for PEMFC. The reliability and the durability of the fuel cell system have to be improved and the diagnosis approach is a way to extend the PEMFC lifetime. A signal- based method is used to estimate the state of health of the system. The energetic distribution is given according to different experimental conditions. The energy contents...
A new master degree on Intelligent Electric Vehicles is proposed at University of Lille 1, France. Indeed, industrial companies in transportation system are moving on more electrified vehicles. As transversal skills are required for transportation applications, this Master degree is organized in a progressive way and on a project-based philosophy.
The quasi-Z-source inverter (qZSI) features as the shoot-through capability and the ability to buck and boost voltage with a single-stage structure. However, the protection mechanism for the shoot-through current (STC) is essential because of the increased current stress on the switching devices. This paper presents a STC sensing method for the protection based on the combined currents. Both the STC...
An innovative learning approach, qualified as Problem- and Project-Based Learning (PPBL), has been developed in the department of Electrical and Computer Engineering of the Université de Sherbrooke. PPBL is applied totally from the first term of our programs, instead of being applied gradually. Basically, the students are involved in two types of activities in each term. The first one consists...
In this paper we present an innovative and precise way to calculate the available capacity in a battery. This quantity is essential to assess the ageing process during real use or ageing tests. The most common way to measure the battery capacity consists on a constant current discharge. It is quite simple to implement but very dependent of impedance and relaxation state of the battery. Consequently,...
In active electromagnetic suspension system, the motor speed performance is vital to the suspension performance. However, PI speed controller is not robust against the parameter variations and load disturbances. To solve the problem, a high-order sliding mode (HOSM) speed control algorithm for tubular fault-tolerant linear permanent magnet (TFT- LPM) motor is proposed. The algorithm is characterized...
This paper considers one of the most commonly used equivalent circuit models (ECMs) for lithium-ion batteries and investigates the sensitivity of the model output to changes of model parameters using the Morris method. Experiments are carried out on a lithium- ion cell with nickel manganese cobalt oxide (NMC) electrode and parameters of the model are identified in the state of charge (SOC) range [100%,10%]...
Conducted emissions (CE) generated by the inverter and propagating along the high-voltage dc power bus in electric vehicles are predicted via a circuit model implemented in SPICE. Through extensive simulations, the impact of different functional operating points (in the typical torque-speed characteristic used to drive the motor) is put in evidence. Additionally, the role of radio-frequency noise...
Fuel cell (FC) is considered as one of the most interesting solutions to overcome future energy crisis announced by the International Energy Agency. However, various bottlenecks, whether technological or societal, slow the industrial interest for this technology and therefore the mass production of fuel cells. One of these bottlenecks is related to the limited lifetime of FC system. To counter it,...
In this paper, the battery pack electro-thermal model is established and three different cooling optimization measures (thermal grease filling, heat sink by aluminum palte and wind cooling) are simulated to verify their effectiveness. The simulation reveals that the thermal grease filling method will reduce 3.75℃, the heat sink by aluminum plate will reduce 5.14℃,and the wind cooling...
This paper proposes a partitioned rotor hybrid- excited flux-switching machine, in which the ferrite permanent magnets and the DC field windings both serve as magnetic excitation sources. Firstly, the electromagnetic performances, such as the phase flux, back-EMF, electromagnetic torque, and so on, are presented. Then, both the flux-weakening and flux-strengthening capabilities are evaluated in details...
Eco-driving using V2I communication at multiple intersections has significant fuel benefit for road transportation. This paper presents a fuel saving strategy for vehicle travelling in between two red signalized intersections. An optimal control problem (OCP) is formulated to minimize fuel consumption and solved by Legendre pseudo-spectral (LPS) method. It is found that the optimal driving operation...
This paper proposes a modified harmonic currents injection strategy for permanent magnet synchronous motors (PMSMs) with open winding topology to suppress torque ripples considering magnetic saturation. Harmonic current injection strategy is commonly used to reduce torque ripples generated by interaction between non-sinusoidal flux linkage and sinusoidal current. However, the influence of magnetic...
This paper investigates the electromagnetic vibration and noise in amorphous alloy permanent magnet synchronous motors (AAPMSMs) whose stator cores are made from amorphous magnetic material (AMM). In addition, conventional silicon steel permanent magnet synchronous motors (SSPMSMs) whose stator cores are made from silicon steel sheet (SSS) are investigated as a comparison at the same time. Data for...
A data-driven diagnostic approach is developed and proved successful to identify the weld breakage of the connector in battery pack according to the data-upload by the remote monitoring platform. Firstly, two modes of the weld breakage: complete breakage and loose contact, as well as their statistical patterns are illustrated. To further assure the weld breakage fault, the capacity of battery pack...
This paper investigates the influence of rotor pole number on the electromagnetic performance of double-stator switched flux permanent magnet (DS-SFPM) machines. Both stators of the developed machines consist of doubly-salient 6-stator poles, whilst the machines with 10-, 11-, 13- and 14-rotor poles are selected for optimization and comparison. Moreover, the influence of leading design parameters...
Aimed to solve the armored vehicles' features and the steering control problem, a dual steering control strategy based on DYC and the traction control is established. Based on the DYC, which is controlled by yaw angular velocity tracking control, the armored vehicles' dual steering and slip optimal control are realized. It improve the vehicles' performance in steering and steady effectively. And the...
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