EMI Characterization and Simulation With Parasitic Models for a Low-Voltage High-Current AC Motor Drive

Lai, Jih-Sheng; Huang, Xudong; Chen, Shaotang; Nehl, T. W.

doi:10.1109/tia.2003.821795

Cited by 54 publications

(17 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With this in mind many efforts have been made to model and characterize (EMI) noise emissions of a particular device or system in power electronics [1,. However, there is still no definitive way for a unified approach of The modeling of EMI can generally be broken down into two categories: detailed, physics based modeling [21][22][23][24][25][26][27][28][29][30] and behavioral modeling [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. Either method can be used to model the EMI propagation path or the noise source.…”

Section: Literature Reviewmentioning

confidence: 99%

Generalized Terminal Modeling of Electromagnetic Interference

Baisden

Boroyevich

Wang

2010

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

Terminal models have been used for various power electronic applications. In this work a two-and three-terminal black box model is proposed for electro-magnetic interference (EMI) characterization. The modeling procedure starts with a time-variant system at a particular operating condition, which can be a converter, set of converters, sub-system or collection of components. A unique, linear equivalent circuit is created for applications in the frequency domain. Impedances and current / voltage sources define the noise throughout the entire EMI frequency spectrum. All parameters needed to create the model are clearly defined to ensure convergence and maximize accuracy.The model is then used to predict the attenuation caused by a filter with increased accuracy over small signal insertion gain measurements performed with network analyzers. Knowledge of EMI filters interactions with the converter allows for advanced techniques and design constraints to optimize the filter for size, weight, and cost. Additionally, the model is also demonstrated when the operating point of the system does not remain constant, as with AC power systems.Modeling of a varying operating point requires information of all the operating conditions for a complete and accurate model. However, the data collection and processing quickly become unmanageable due to the large amounts of data needed. Therefore, simplification techniques are used to reduce the complexity of the model while maintaining accuracy throughout the frequency spectrum.The modeling approach is verified for linear and power electronic networks including: a dcdc boost converter, phase-leg module, and a simulated dc-ac inverter. The accuracy of the model is confirmed up to 100 MHz in simulation and at least 50 MHz for experimental validation.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Generalized Terminal Modeling of Electromagnetic Interference

Baisden

Boroyevich

Wang

2010

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

show abstract

“…In the context of previous section the present paper describes and proposes a generic electronic converter as an education tool for power electronics and electric drives learning based on experimentation which can be used by students to learn from experience the most important issues about power electronics, converters, and electric drives, including the ones regarding EMI/EMC [19] - [24]. This work was developed in order to solve some of the difficulties described in the introduction section, and motivated by the lack of commercial products with similar technical characteristics and requirements, namely: low cost, open (i.e.…”

Section: Motivationmentioning

confidence: 99%

“…Otherwise, students will never feel the second issue concerning EMI when fast switches are used nowadays like IGBTs. The main issues about EMI emissions in power electronics and electric drives have been studied and the references [19] - [22] and [24] are just some very good examples. The objective here is just to demonstrate how easy is to show experimentally some of these important and practical issues, using the developed generic converter.…”

Section: Some Experimental Illustrationsmentioning

confidence: 99%

See 1 more Smart Citation

A generic converter for experimentation based power electronics learning

Leite

Barbosa

Teixeira

et al. 2005

2005 European Conference on Power Electronics and Applications

View full text Add to dashboard Cite

show abstract

“…Models of the power inverter system are necessary to analyze EMI source and propagation inside the inverter to find the elements responsible for the EMI. Since full-wave models based on the "black box" approach cannot show the location of the noise source or the propagation path inside of the power inverter [7,8], a "gray box" terminal modeling technique for a two-port network is proposed to predict conducted EMI [15,16]. A matrix form and linear equivalent circuit of the motor system have been proposed to model the EMI characteristics [17,18].…”

Section: Introductionmentioning

confidence: 99%

Mitigation Emission Strategy Based on Resonances from a Power Inverter System in Electric Vehicles

et al. 2016

View full text Add to dashboard Cite

Abstract:Large dv/dt and di/dt outputs of power devices in the DC-fed motor power inverter can generate conducted and/or radiated emissions through parasitics that interfere with low voltage electric systems in electric vehicles (EVs) and nearby vehicles. The electromagnetic interference (EMI) filters, ferrite chokes, and shielding added in the product process based on the "black box" approach can reduce the emission levels in a specific frequency range. However, these countermeasures may also introduce an unexpected increase in EMI noises in other frequency ranges due to added capacitances and inductances in filters resonating with elements of the power inverter, and even increase the weight and dimension of the power inverter system in EVs with limited space. In order to predict the interaction between the mitigation techniques and power inverter geometry, an accurate model of the system is needed. A power inverter system was modeled based on series of two-port network measurements to study the impact of EMI generated by power devices on radiated emission of AC cables. Parallel resonances within the circuit can cause peaks in the S21 (transmission coefficient between the phase-node-to-chassis voltage and the center-conductor-to-shield voltage of the AC cable connecting to the motor) and Z11 (input impedance at Port 1 between the Insulated gate bipolar transistor (IGBT) phase node and chassis) at those resonance frequencies and result in enlarged noise voltage peaks at Port 1. The magnitude of S21 between two ports was reduced to decrease the amount of energy coupled from the noise source between the phase node and chassis to the end of the AC cable by lowering the corresponding quality factor. The equivalent circuits were built by analyzing current-following paths at three critical resonance frequencies. Interference voltage peaks can be suppressed by mitigating the resonances. The capacitances and inductances generating the parallel resonances and responsible elements were determined by the calculation through the equivalent circuits. A combination of mitigation strategies including adding common-mode (CM) ferrite chokes through the Y-caps and the AC bus bar was designed to mitigate the resonances at 6 MHz, 11 MHz, and 26 MHz related to the CM conducted emission by IGBT switching and the radiated emission of the AC cable. The values of Z11 decreased respectively by 15 dB at 6 MHz, 0.4 dB at 11 MHz, and 11.5 dB at 26 MHz and the values of S21 decreased respectively by 8.6 dB at 6 MHz, 7 dB at 11 MHz, and 6.3 dB at 26 MHz. An equivalent model of the power inverter system for real-time simulation in time domain was built to validate the mitigation strategy in simulation software PSPICE.

show abstract

EMI Characterization and Simulation With Parasitic Models for a Low-Voltage High-Current AC Motor Drive

Cited by 54 publications

References 5 publications

Generalized Terminal Modeling of Electromagnetic Interference

Generalized Terminal Modeling of Electromagnetic Interference

A generic converter for experimentation based power electronics learning

Mitigation Emission Strategy Based on Resonances from a Power Inverter System in Electric Vehicles

Contact Info

Product

Resources

About