Using gallium‐nitride cascode switching devices for common mode electromagnetic interference reduction in power converters/inverters

2016 ◽  
Vol 9 (8) ◽  
pp. 1727-1731 ◽  
Author(s):  
Jhe‐Yu Lin ◽  
Dan Chen ◽  
Chung‐Wen Hung ◽  
Zan Huang
Keyword(s):  
Gallium Nitride ◽  
Electromagnetic Interference ◽  
Power Converters ◽  
Common Mode ◽  
Interference Reduction ◽  
Switching Devices

scholarly journals A Simplified Frequency Model for Industrial Common-Mode Chocks Used in High-Power Converters

2021 ◽  
Vol 21 (1) ◽  
pp. 15-22
Author(s):  
Seyed Fariborz Zarei ◽  
Saeed Khankalantary
Keyword(s):  
Radio Frequency ◽  
High Power ◽  
Electromagnetic Interference ◽  
Power Converters ◽  
Nonlinear Frequency ◽  
Frequency Model ◽  
Common Mode ◽  
Frequency Dependent ◽  
Proposed Model ◽  
Emi Filters

This paper proposes a simplified analytical model for electromagnetic interference (EMI) filters used in high-power converters. Highpower converters produce radio frequency conducted noise because they use high-frequency switching in the range of a few kHz to tens of kHz. The noise propagates into the power grid, which disturbs the functionality of the radio frequency apparatuses. Well-known standards, such as CISPR, provide the measurement and assessment methodologies for these devices. Moreover, the emission level of the noise is restricted at the source side. Using EMI filters is the most effective approach for dealing with this issue. However, due to the nonlinear nature of the common-mode (CM) cores, the modeling of the cores is a complicated task, which makes the selection and design of the filters less than optimal. In this paper, an analytical modeling of the CM filters is provided to suit the nonlinear frequency-dependent behavior of the CM cores. The simplicity of the proposed model makes it a very suitable choice for inclusion in the design procedures, which results in a more accurate and optimum filter selection among the many available commercial industrial filters. To validate the proposed model, the frequency-dependent model obtained is verified by experimental tests with a commercial CM choke. According to the results, the proposed model accurately describes the actual EMI filter behavior.

scholarly journals A General Transformer Evaluation Method for Common-Mode Noise Behavior

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1984
Author(s):  
Kaining Fu ◽  
Wei Chen ◽  
Subin Lin
Keyword(s):  
Electromagnetic Interference ◽  
High Frequency ◽  
Evaluation Method ◽  
Power Converters ◽  
Common Mode ◽  
Coupling Capacitance ◽  
Class B ◽  
Coupling Path ◽  
Transformer Coupling ◽  
Testing Instruments

In isolated power converters, the transformer is a key part of voltage transformation and isolation. Since common-mode (CM) noise is rather difficult to suppress compared with different-mode (DM) noise, more and more scholars are paying attention to the characteristics of CM noise, especially in high-frequency CM noise behaviors. CM noise can be further divided into conducted CM noise and radiated CM noise, and the main focus of this paper is on conducted CM noise. The CM coupling capacitance of the transformer is one of the main contributors of CM noise, which has been verified in many previous studies. Hence, eliminating the CM noise in a transformer coupling path can significantly lower the whole CM noise level of the converter. Professional conducted electromagnetic interference (EMI) testing instruments are quite expensive. In this paper, a general transformer evaluation technique for CM noise behavior is proposed. Only a signal generator and oscilloscope can achieve transformer CM noise behavior evaluation. PCB planar flyback transformers are designed, and a series of noise spectrums and voltage waveforms can verify the effectiveness of the proposed transformer evaluation method. The flyback adapter porotype can pass the EMI standard limited line EN55022 class B by the proposed evaluation method.

scholarly journals Opposite Triangle Carrier with SVPWM for Common-Mode Voltage Reduction in Dual Three Phase Motor Drives

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 282
Author(s):  
Seon-Ik Hwang ◽  
Jang-Mok Kim
Keyword(s):  
Electromagnetic Interference ◽  
Pulse Width Modulation ◽  
Motor Drives ◽  
Common Mode ◽  
Pwm Inverter ◽  
Common Mode Voltage ◽  
Voltage Vector ◽  
Three Phase ◽  
The Common ◽  
Zero Voltage

The common-mode voltage (CMV) generated by the switching operation of the pulse width modulation (PWM) inverter leads to bearing failure and electromagnetic interference (EMI) noises. To reduce the CMV, it is necessary to reduce the magnitude of dv/dt and change the frequency of the CMV. In this paper, the range of the CMV is reduced by using opposite triangle carrier for ABC and XYZ winding group, and the change in frequency in the CMV is reduced by equalizing the dwell time of the zero voltage vector on ABC and XYZ winding group of dual three phase motor.

scholarly journals Investigations on EMI Mitigation Techniques: Intent to Reduce Grid-Tied PV Inverter Common Mode Current and Voltage

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3395 ◽  
Author(s):  
Umashankar Subramaniam ◽  
Sagar Mahajan Bhaskar ◽  
Dhafer J.Almakhles ◽  
Sanjeevikumar Padmanaban ◽  
Zbigniew Leonowicz
Keyword(s):  
Electromagnetic Interference ◽  
Pulse Width Modulation ◽  
Leakage Currents ◽  
Common Mode ◽  
Third Harmonic ◽  
Electrical Drives ◽  
Pv Inverter ◽  
Common Mode Voltage ◽  
Modulation Techniques ◽  
Power Inverters

Power inverters produce common mode voltage (CMV) and common mode current (CMC) which cause high-frequency electromagnetic interference (EMI) noise, leakage currents in electrical drives application and grid-connected systems, which consequently drops the efficiency of the system considerably. This CMV can be mitigated by designing suitable EMI filters and/or investigating the effects of different modulation strategies. In this paper, the effect of various modulation techniques over CMV and CMC are investigated for two-level and three-level inverters. It is observed that the modified third harmonic injection method reduced the CMV and CMC in the system by 60%. This modified pulse width modulation (PWM) technique is employed along with EMI chokes which results in reduced distortion of the system.

scholarly journals Common-Mode and Phase-to-Ground Voltage Reduction in Back-to-Back Power Converters With Discontinuous PWM

2020 ◽  
Vol 67 (9) ◽  
pp. 7499-7508 ◽  
Author(s):  
Javier Samanes ◽  
Eugenio Gubia ◽  
Xabier Juankorena ◽  
Carlos Girones
Keyword(s):  
Power Converters ◽  
Common Mode
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