How is eddy current power loss calculated?

Eddy current power loss calculated with quadratic model (fit) and with finite elements versus time in the case of constant field voltage, overexcitation and load angle amplitude 12°. shows that the magnitude of the eddy current density is high in the end region.

Why is field current more important than eddy current?

The squares of the two stator current components are roughly equally important for the losses. The field current is more important for the eddy current losses in the clamping structure than in the stator core. This can at least partly be explained by the reluctances of the flux paths through air.

How to estimate eddy current losses in clamping structure and stator core?

Conclusions At steady state and at load angle oscillations, it is possible to estimate the eddy current losses in the clamping structure and the stator core with a simple loss model of quadratic functions of the field current and the d - q components of the rms stator current.

Do Eddy current losses increase with Max?

shows that the time averages of the eddy current losses in the whole stator core, all clamping fingers and both clamping rings at constant if and Pm increase with βmax. also shows that the losses increase with decreasing excitation, which agrees with results of measured and FE simulated axial flux density [ 7, 8 ].

How do you calculate instantaneous eddy current loss at steady state?

(30) The instantaneous eddy current loss at steady state in a stator part with volume V spanning a pole pitch is therefore the time averaged loss, i.e. P e d = ∫ V J ( x, y, z, t) 2 σ d V = ∫ V J ( y, z) 2 2 σ d V = P e d, a v.

How many eddy currents are there between two steel frames?

The site has had a generator upgraded and the cabling has been split between 2 steel frames There is approx. 500mm between frames in a steel wall Each Frame has 2 of each phase cable and 2 x neutral As the cables are split will this cause Eddy currents between the steel frames.