Calculation of Motor Capacitances for Prediction of the Voltage Across the Bearings in Machines of Inverter-Based Drive Systems

Muetze, Annette; Binder, A.

doi:10.1109/tia.2007.895734

Cited by 141 publications

(72 citation statements)

References 15 publications

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“…where the BVR (Bearing Voltage Ratio) is a fraction of the CMV that drops across the bearing and is less than 0.1 [21]. Also, Rb is the oil electrical resistance after breakdown, about 10 ohms, and AH denotes the Hertzian contact area which is proportional to the square of the motor size (AH ≈ h 2 ).…”

Section: CMV and Bearing Currentmentioning

confidence: 99%

“…Also, Rb is the oil electrical resistance after breakdown, about 10 ohms, and AH denotes the Hertzian contact area which is proportional to the square of the motor size (AH ≈ h 2 ). Although any voltage higher than the breakdown voltage leads to breakdown, the corrosion volume per discharge is determined as a function of the voltage squared [21]. Therefore, CMV reductions always reduce corrosion and increases bearing life.…”

Section: CMV and Bearing Currentmentioning

confidence: 99%

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Flying Capacitor DTC Drive with Reductions in Common Mode Voltage and Stator Overvoltage

Rahmati¹,

Arasteh²,

Farhangi³

et al. 2011

Journal of Power Electronics

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This paper gives a detailed analysis of the direct torque control (DTC) strategy in a five-level drive and proposes a 24-sector switching table. The known problems in low-voltage drives such as bearings currents and an overvoltage phenomenon which leads to premature failure are reviewed and the occurrence of these problems in medium voltage drives has been investigated. Then a solutions to these problems is presented and the switching table to deal with these problems is modified. Simulation and experimental results on a 3kVA prototype confirm the proposed solution. In implementing the above strategy a TMS320F2812 is used.

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Section: CMV and Bearing Currentmentioning

confidence: 99%

Section: CMV and Bearing Currentmentioning

confidence: 99%

Flying Capacitor DTC Drive with Reductions in Common Mode Voltage and Stator Overvoltage

Rahmati¹,

Arasteh²,

Farhangi³

et al. 2011

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…In order to have a reference value and be able to compare the simulation results in FEMM, the formulation proposed in [6] was used to calculate C sr analytically. The value found through the formula was 67.41 pF, while in simulations the obtained value was 77.58 pF.…”

Section: B Capacitance Between Stator and Rotor -C Srmentioning

confidence: 99%

“…It is known that C b varies with the motor rotation speed [3,5,6], so its measure is uncertain. This was one of the reasons that made impossible the measurement of C rf in the case of the present work, and then the simulation result was compared again with the value obtained by the analytical formulas proposed in [6]. Using the equation, the value found for C rf was 936.15 pF, while the result from the simulation was equal to 860.93 pF.…”

Section: Capacitance Between Rotor and Frame -C Rfmentioning

confidence: 99%

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Induction motor capacitances calculation using FEA for common mode current studies in ATP

C.S¹,

Camacho²,

Paula³

et al. 2011

REPQJ

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Abstract. The prediction of common-mode currents in inverter-driven induction motors is necessary to propose mitigating solutions in order to prevent failures and ensure the proper operation of the entire electrical system. The motor model for these high-frequency studies is relatively simple; however, to find its parameters accurately is a very complex task. In this context, this paper presents an alternative to estimate leakage capacitances in induction motors, based on the finite element technique, through computational simulation using FEMM (Finite Element Methods Magnetics). Then, an application of the motor capacitances in an appropriate model for common-mode quantities determination is shown as an example, using the ATP (Alternative Transients Program).

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Power Electronic Interfaces in Smart Grids

Smoleński

2012

Conducted Electromagnetic Interference (EMI) in Smart Grids

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Calculation of Motor Capacitances for Prediction of the Voltage Across the Bearings in Machines of Inverter-Based Drive Systems

Cited by 141 publications

References 15 publications

Flying Capacitor DTC Drive with Reductions in Common Mode Voltage and Stator Overvoltage

Flying Capacitor DTC Drive with Reductions in Common Mode Voltage and Stator Overvoltage

Induction motor capacitances calculation using FEA for common mode current studies in ATP

Power Electronic Interfaces in Smart Grids

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