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This paper deals with a fast current control for a novel axial flux permanent magnet machine based on model predictive control. This machine, called flywheel enegy storage system, is controlled to function as a fast-response energy storage device. Fast acceleration or deceleration is required for fast storing and releasing energy respectively. Therefore model predictive control method, which can pre-calculate...
Electrical marine propulsion systems are characterized by very high level requirements in terms of compactness, acoustic behavior and reliability. In this particular context, the use of multiphase PM machines associated with VSI drives appears to be a very efficient solution. Presented work focus on the use of such a system in open circuited phase fault conditions. With this kind of system it is possible...
A fault tolerant drive based on a series architecture (one or two DC sources, two voltage source inverters and a PMSM) is studied in this paper. Three different operating modes are considered: normal mode, open-circuit degraded mode and short-circuit degraded mode. For each case, an adapted torque control strategy is proposed, applied and tested. The main contribution lies in the control strategies...
This paper deals with a methodology for presizing the induction motor propulsion of an Electric Vehicle (EV). Based on the EV desired performances, the induction motor optimal power can be calculated. The final objective is to find its minimum weight, volume, and cost that meet the design constraints with minimum power under the European urban (ECE-15) and sub-urban (EUDC) driving cycles. The power...
Functional verification of new power-electronic converters and their control requires final verification at a test bench. For this suitable machine-sets have to be available. Changing type or rating of the machine requires high effort. Fast and cost-effective prototype development and testing and production-site quality monitoring becomes possible by replacing the machine-set with a suitably designed...
This paper describes the MTPA (maximum torque per ampere) control strategy of Salient-pole PMSM (permanent magnet synchronous motor) and its flux-weaking control strategy. Salient-pole PMSM often used the MTPA control strategy, the method that MTPA curves obtained from look-up table is usually used, but it will reduce the real-time performance and reliability of the system. In this paper, electromagnetic...
Excellent torque dynamics are important in traction applications - not because of acceleration or deceleration, but to meet additional demands as suppression of drive chain oscillations, slip-slide protection and electronic stability control. Dynamics are limited by the rating and the switching frequency of the inverter, which the control has to make optimal use of. This paper presents a stator-flux-based...
Permanent magnet synchronous machines (PMSMs) are the most popular motors being used as traction motors in the electric drive-train due to their high torque-per-ampere characteristics and potential for wide flux-weakening operation to extend the constant power range. This paper classifies and overviews the state-of-the-art flux-weakening control strategies for PMSMs. The advantages and disadvantages...
A control scheme for a high torque-density seven-phase induction motor is presented. This scheme integrates within a coherent solution some of the features that are commonly required to a modern electric vehicle drive, such as the capability to exploit the maximum torque in the whole speed range, a weak dependence on the motor parameters, a good robustness against the variations of the dc-link voltage...
Two permanent magnet synchronous motors (PMSM) whose rotor magnetic circuit structures were radial and tangential were designed. vector potential and energy methods were used to calculate the electromagnetic parameters of the motors. Based on the mathematical model, the torque characteristics were calculated, control performances within constant torque and constant power control area were analysed...
In this paper, an adaptive torque control scheme for Permanent Magnet Synchronous Motors (PMSM) used in automotive applications is presented. The proposed algorithm relies on stator currents and rotor speed measurements and achieves global asymptotic convergence of the torque to its desired time-varying reference. The appealing feature of the proposed scheme is that little information about the motor...
Vehicle emission reduction has been a research objective for many years, by improving fuel economy and energy efficiency. Therefore, this paper presents a fuzzy logic controller for a Parallel Hybrid Electric Vehicle (PHEV). The PHEV required driving torque is generated by a combined contribution from an Internal Combustion Engine (ICE) and an Induction Motor (IM). The proposed Fuzzy Logic Controller...
The traction motor of Hybrid Electric Commercial Vehicle(HECV) should have the characteristics such as high power versus weight ratio and very high torque at low speed. So interior permanent-magnet synchronous motor(IPMSM) is suitable for HECV. This paper presents a maximum torque per ampere(MTPA), a field weakening (FW) control and a reduced-order observer of IPMSM for HECV. By using computer simulation,...
Fault-tolerant flux-switching permanent magnet (FT-FSPM) motor is a new class of stator-PM brushless motors, a potential candidate for many applications where reliability and power density are of importance. In this paper, a new method is proposed for torque ripple minimization, in which the key is to introduce harmonic currents to compensate for non-ideal sinusoidal back-EMF. Moreover, a fault-tolerant...
Permanent magnet synchronous motors (PMSM) have been developed for numerous applications due to their attractive features especially after the development of rare earth permanent magnet materials as NdFeB or SmCo. However, the magnets on the rotor accentuate the thermal constraints and limit the high speed operation. To eliminate these drawbacks, a new Switching Flux Synchronous Motor with Hybrid...
This paper presents three current control strategies for a switched reluctance machine (SRM). Two classical controllers are recall : the hysteresis and the proportional - integral controller. Dynamic and current ripples with both controllers are compared and discussed. Then, a new current controller qualified as “hybrid controller” is proposed. It is a combination of the two previous structures. The...
In this paper, the robust yaw stability control based on active steering control is proposed for electric vehicles (EVs). A two degree of freedom control method by a disturbance observer is applied to control design for yaw stabilization. Moreover, the feed-forward disturbance compensator is designed to compensate unexpected yaw moment caused by torque differences between left and right driving motors...
Electric vehicles pose specific challenges to the drive system and the control scheme. Safety-relevant features like slip-slide control, electronic stability programs or emergency-brake assistance require fast torque control in the whole speed range at limited voltage control margin. Stator-flux-oriented Indirect Stator-Quantities Control (ISC) is limited only by the physical bounds of available voltage...
Since the efficiency is very important in automotive applications, in this paper a new minimum-copper-loss control scheme, over full speed range for an IPMSM drive used for hybrid electric vehicle application under both current and voltage limits is presented. This paper presents an algorithm to get the smallest current vector command in both field-weakening and deep field-weakening regions for a...
The key problem for BLDCM to obtain high performance is to reduce the ripple of torque. Current hysteresis PWM used for BLDCM can reduces the ripple of current, but not torque because the nonlinear relation between current and torque. Direct torque control is put forward in 1980s. The merit of DTC is that the response of torque is fast, and the ripple of torque is reduced. In this paper, direct torque...
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