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This paper proposes an approach to estimate the ratio between shorted and total turns in interior permanent magnet synchronous machines (IPMSM). When an inter-turn short circuit (ISC) occurs, a particular disturbance affects the motor. The proposed method estimates this disturbance using an observer; this estimated signal is used to obtain the short circuit ratio. The observers are based on a dynamic...
This paper presents a new lumped parameter method (LPM) to capture nonlinear magnetic behavior of interior permanent magnet synchronous machines (IPMSM). Firstly, the nonlinear B-H curve is modeled as a mathematical expression using Matlab curve fitting toolbox. Using the geometry of the machine, the flux density B versus magnetic field intensity relation is transformed to flux versus MMF relation...
This paper proposes a novel way to form the model for internal permanent magnet synchronous machines (IPMSM) under inter-turn short circuit (ISC) faults. Based on this model, an observer is formed for ISC diagnostics and torque compensation. The IPMSM model under ISC is presented as the model of a healthy machine, but with a disturbance given by the ratio between shorted and total turns times the...
This paper proposes an analysis of a fault index signal for internal permanent magnet synchronous machines (IPMSM) under inter-turn short circuits (ISC). Research has proven that the dynamic model of an electrical motor under ISC can be modeled as a healthy machine affected by a disturbance current representing the effect of the ISC. This current is equal to the product of the shorted turns ratio...
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