High frequency transformer modeling

Biernacki, J.; Czarkowski, Dariusz

doi:10.1109/iscas.2001.921401

Cited by 28 publications

(14 citation statements)

References 2 publications

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“…In order to evaluate the voltage stresses of the transformer, the transfer functions of the primary and secondary voltages U p and U s to the source voltages U 1 and U 2 can be derived from Equation (7) as (20) and (21), as shown at the bottom of the next page.…”

Section: Transfer Function Of Transformer Voltagesmentioning

confidence: 99%

Elimination of High Frequency Oscillation in Dual Active Bridge Converters by dv/dt Optimization

Cui¹,

Xue²,

Jiang³

2019

IEEE Access

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With the increased switching speed, the high-frequency oscillation (HFO) problem caused by the stray capacitances of the transformer and the high dv/dt of the dual active bridge (DAB) converter becomes more serious. In this paper, a frequency-domain model considering the circuit parasitic parameters is derived to figure out the mechanism of HFO. It shows that HFO could be mitigated by reducing the dv/dt of the H-bridge output voltage. However, HFO will become apparent again, as the dv/dt continues to decrease. Based on the mathematical model, the HFO problem could be eliminated theoretically by placing the zero crossing points (ZCP) of the DAB dv/dt excitation at the oscillation frequency. The DAB dv/dt is adjusted by adding parallel capacitors to the power devices. A calculation method for the required capacitance is given to obtain an optimal dv/dt. Not only the HFO problem is eliminated, but also the efficiency could be improved due to the better soft-switching condition and less oscillation loss in the transformer. The simulations and experiments on a 6.6-kW DAB prototype are carried out to validate the proposed method. The HFO voltage spike amplitude is reduced by about 95% with the proposed method, which accords well with the theoretical analysis.INDEX TERMS Dual active bridge, energy storage systems, high frequency oscillation, stray capacitance.

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Section: Transfer Function Of Transformer Voltagesmentioning

confidence: 99%

Elimination of High Frequency Oscillation in Dual Active Bridge Converters by dv/dt Optimization

Cui¹,

Xue²,

Jiang³

2019

IEEE Access

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“…It consists of ideal transformer, magnetizing inductance L M , core-loss shunt resistance R C , leakage inductances L lP and L lS , winding resistances R P and R S and stray capacitances C P and C S . The stray capacitances model the effect of turn-to-turn capacitance, layer-to-layer capacitance, windingto-winding capacitance, winding-to-core capacitance, windingto-shield capacitance, core-to-shield capacitance and the capacitance between the outer winding and surrounding circuitry [42]- [45].…”

Section: Galvanic Isolationmentioning

confidence: 99%

Coupling for Power Line Communications: A Survey

Costa¹,

Queiroz²,

Adebisi³

et al. 2017

JCIS

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The advent of power line communication (PLC) for smart grids, vehicular communications, internet of things and data network access has recently gained ample interest in industry and academia. Due to the characteristics of electric power grids and regulatory constraints, the effectiveness of coupling between the power line and PLC transceivers has become a very important issue. Coupling devices used to inject or extract data communication signals into or from power lines are very important components of a PLC system. There is, however, an obvious gap in the literature for a detailed review of existing PLC couplers. In this paper, we present a comprehensive review of couplers, which are required for narrowband and broadband PLC transceivers. Prevailing issues that protract the design of couplers and consequently subtended the inventions of different types of couplers are clearly described. We also provide a useful classification of PLC couplers based on the type of physical couplings, voltage levels, frequency bandwidth, propagation modes and a number of connections. This survey will guide researchers, as well as designers alike, into a quicker resourcing when studying coupling in narrowband and broadband PLC systems.

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“…20 are the leakage inductances, resistances and selfapacitances of the primary, secondary windings, and m , m and C 120 respectively refer to the magnetic inductance, equivalent core loss resistance and mutual capacitance between the two windings [4].…”

Section: High Frequency and High Voltage Transformermentioning

confidence: 99%

A Study on the Conducted Interference of Capacitor Charging Power Supply

Han¹,

Gao²,

Sun³

et al. 2013

EPE

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In this paper, a mathematical analysis of the EMI (Electromagnetic Interference) for a 20 kHz/10 kV capacitor charging power supply in frequency-domain is presented, and a related circuit model considering the transient switching interference is proposed. Due to the high working frequency and the device-switching transitions, the conducted EMI caused by the charging circuit which includes the harmonics of grid frequency, working frequency and device-switching transition frequencies. Thus under certain working situations or loads parallel power supply, the interference may cause charging failure. To solve this problem, a high frequency transformer modeled with stray capacitances and an approximation of the device-switching transition is applied in the Spice-based simulation model, and a mathematical analysis in frequency-domain is presented.

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High frequency transformer modeling

Cited by 28 publications

References 2 publications

Elimination of High Frequency Oscillation in Dual Active Bridge Converters by dv/dt Optimization

Elimination of High Frequency Oscillation in Dual Active Bridge Converters by dv/dt Optimization

Coupling for Power Line Communications: A Survey

A Study on the Conducted Interference of Capacitor Charging Power Supply

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