Publicaties
Current response based online inductance estimation method for IPMSM DTC drives considering magnetic saturation Universiteit Gent
In the direct torque control (DTC) of Interior Permanent-Magnet Synchronous Machine (IPMSM), the machine inductances are used to compute electromagnetic torque and stator flux. However, the inductances of machine vary nonlinearly with respect to the current due to magnetic saturation effect. To online estimate the inductances of an IPMSM, this paper proposes a novel method based on the current response caused by active voltage vectors inherent ...
DC link capacitor voltage balancing of a dual three-level T-Type AC drive using switching state redundancy Universiteit Gent
Concept study of a double rotor induction machine used as continuously variable transmission Universiteit Gent
In a drive train a continuously variable transmission (CVT) has the advantage that the combustion engine can be driven in its optimal point along the requested power curve, which enhances overall efficiency. Moreover there is no power loss during shifting of gears which is often demanded in off highway applications. Several mechanical and hydraulic CVT's exist that have already proven their functionality, each having their pros and cons. This ...
The effect of common-mode voltage elimination on the iron loss in machine core laminations of multilevel drives Universiteit Gent
This paper studies the effect of common-mode voltage elimination (CMVE) on the iron loss of electrical machine core laminations under multilevel converter supply. Three identical magnetic ring cores are excited by either a three-level T-type or five-level dual T-type voltage source converter to study the behavior of CMVE on a three-phase system. Both multilevel converters are controlled by using a space vector pulse width modulation as it is one ...
Loss evaluation of interior permanent-magnet synchronous machine drives using T-type multilevel converters Universiteit Gent
This paper studies the effect of using T-type multilevel converters on the power loss of interior permanent Magnet Synchronous Machine (IPMSM) drives. The effect of the T-type converters is compared to two-level converter and conventional multilevel converters. The study is performed at different switching frequencies to show its effect on the drive loss. The iron and magnet losses of the studied IPMSM are computed numerically by means of the ...
Closure to discussion on 'Effect of multilevel inverter supply on core losses in magnetic materials and electrical machines' Universiteit Gent
Presents a closure to the discussion from the following paper, “Electrical machine PWM loss evaluation basics (Ruderman, A. and Welch,R.) in Proc. Int. Conf. Energy Efficiency Motor Driven Syst.,Sep. 2005, vol. 1, pp. 58–68.
Improving the dynamic stiffness in a self-sensing BLDC machine drive using estimated load torque feedforward Universiteit Gent
This paper presents a load torque estimation method for self-sensing brushless DC drives. Torque ripples in brushless DC machines can be reduced using load torque information. This method uses the terminal voltage, the virtual neutral point voltage and the DC-bus current of the machine. The algorithm uses the variation of successive back-EMF samples to estimate the rotor speed. The rotor position is estimated by defining an intermediate function ...
Open-loop behaviour of back-EMF based self-sensing BLDC drives Universiteit Gent
In brushless dc machines the current commutation between phases is triggered based on information of the permanent-magnet flux position. In most BLDC drives, either sensors are used to detect this flux position or a self-sensing algorithm is applied to estimate the flux position instead. Over the last decades, different techniques have been developed to detect the current commutation instants from the speed-induced back-emf signal. Several of ...
Modeling and control of an induction machine based electrical variable transmission Universiteit Gent
An electrical variable transmission (EVT) is an electromagnetic device with multiple rotors and multiple shafts. In hybrid electric vehicles it is used to split the power to the wheels in a part coming from the combustion engine and a part exchanged with the battery. This paper summarizes how an induction machine based EVT can be modeled and controlled using field oriented control.