This paper presents a nonlinear circuit-coupled 2D finite element model for use in the dynamic simulation of electrical machines with multiple sets of windings, connected to an external electrical circuit, and with rotating parts. An inductance is introduced to account for the 3D end effects on phase inductance, due to the end windings and axial fringing field. The model is applied to the simul...

In this paper a method to track the rotating force vector set up within the air-gap of radial flux rotating electrical machines using fibre Bragg gratings is reported. The proposed technique offers the potential for simultaneous rotor speed and position monitoring. This specific sensor design, together with other FBG-based multi-parameter measurements, is aimed to create an all-optical sensor s...

One important factor in the design process and optimization of electrical machines and drives are iron losses in the core. By using new composite materials and low-loss electrical SiFe steels, the losses in the magnetic ux conducting parts of the machine can be reduced signi cantly. However, it is necessary to have accurate but also easy implementable iron loss models to take the loss e ects in...

The objective of the research is to diminish unwanted forces generated by rotation and unbalanced rotor mass on the rotor of an electrical machine. These forces, dependent on rotational speed, cause vibration that, when occurring in the machine’s natural frequency, causes severe problems. Extra windings are built in the stator of the machine, and they are supplied with current to create an oppo...

Electric drive systems are one of the most important components of our life; billions of them are used in industry, traffic applications and private environment. In the recent past an accelerated development of controlled drive systems could be experienced. The scientific and technical background of today’s most important drive systems, the converter controlled DC-drives and the vector controll...

Soft magnetic composite (SMC) materials and their application in electrical machines have undergone significant development in the past decade. The major advantages of the materials include isotropic magnetic and thermal properties, very low eddy current loss and relatively low total core loss at medium and higher frequencies, and nearly net-shape low cost fabrication process with good toleranc...