A High-Efficiency Super-Junction MOSFET based Inverter-Leg Configuration using a Dual-Mode Switching Technique

Feng, Zhengyang; McNeill, Neville; Williams, B.W.

doi:10.1109/apec.2019.8721853

Cited by 3 publications

(6 citation statements)

References 11 publications

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“…Instead, current flows through the external diodes Dext1 and Dext2. The problem of currents drawn by the MOSFETs' output capacitances is addressed by operating the circuit with the dual-mode control scheme in [18].…”

Section: Summary Of Test Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Study of Power Devices for Use in Phase-Leg at Cryogenic Temperature

Elwakeel

Feng

McNeill

et al. 2021

IEEE Trans. Appl. Supercond.

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As air traffic has been increasing in recent years, the environmental impact of aviation is more obvious, forcing governments to impose stringent regulations on emissions. In order to meet these regulations, and reduce the carbon footprint, research has been directed towards the all-electric and hybrid aircraft, where the use of cryogenic HTS machines and cables has been proposed to reduce the overall size of the aircraft. With the cryogenic system already in place, research has been exploring the use of power electronics at lower temperatures in order to obtain systems with higher power densities and lower losses. In this paper several power semiconductor devices are tested at room and cryogenic temperature in order to evaluate their performance at lower temperature. One of the tested devices, a "CoolMOS" superjunction MOSFET, is used in a single voltage source phase-leg which is experimented with at room and cryogenic temperature to evaluate its efficiency as a primary indication of its usefulness in the All-Electric Aircraft.

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Section: Summary Of Test Resultsmentioning

confidence: 99%

“…5 (b), which was run at a duty cycle of 10%. With respect to [18], the circuit is therefore operating in the unipolar mode with a positive output current. Two PM100 power analyzers, PA1 and PA2, were used to measure the input power and output power.…”

Section: Summary Of Test Resultsmentioning

confidence: 99%

Study of Power Devices for Use in Phase-Leg at Cryogenic Temperature

Elwakeel

Feng

McNeill

et al. 2021

IEEE Trans. Appl. Supercond.

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“…3 shows simulation results for the dual-mode technique over one base-frequency cycle of i LOAD , where the fast-switching and slow-switching modes are selected according to the magnitude of i LOAD . The dual-mode technique was demonstrated in an 800-W inverterleg configuration operating from a 400-V DC supply voltage, and switching at 20 kHz in [13]. The full-load efficiency was 98.7%, compared with 97.5% measured with a benchmark circuit using IGBTs.…”

Section: A Operating Principlementioning

confidence: 97%

Control of Incoming Drain Currents Drawn by Super-Junction MOSFETs in Voltage Source Bridge-Legs

Feng

McNeill

Williams

2020

2020 9th International Conference on Renewable Energy Research and Application (ICRERA)

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To increase the efficiency of renewable energy power conversion systems, traditional silicon IGBTs can be replaced with silicon super-junction MOSFETs. However, the poor performance of the MOSFET's intrinsic diode and the output capacitance present difficulties in voltage source converter bridge-legs. When a MOSFET in this circuit turns on, a charging current has to be sourced into the output capacitance of the complementary freewheeling MOSFET, even if the diode has been deactivated. The peak incoming drain current into the MOSFET turning on can be limited by using a large resistance in series with its gate. However, this increases MOSFET power dissipation. Also, the turn-on propagation delay time is increased. This paper presents a gate driver circuit for profiling the MOSFET's incoming drain current to provide an improved trade-off between incoming peak current, turn-on power dissipation, and delay time.

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“…The series diodes Ds prevent reverse current from flowing into the MOSFETs when they would otherwise be carrying a freewheeling current via their intrinsic diodes. The external diodes Dext in anti-parallel, which replace the function of the intrinsic diodes, can be chosen to have a low reverse recovery charge characteristic [19]- [21]. This paper presents an experimental comparison between different diode deactivation circuits to assess the most efficient of them.…”

Section: Intrinsic Diode Deactivation Circuitrymentioning

confidence: 99%

“…Apart from Qrr, the nonlinear output capacitance Coss of the SJ MOSFET is problematic in VSC converters. This latter problem can be addressed with the dual-mode control technique in [21].…”

Section: Introductionmentioning

confidence: 99%

Comparison of phase-leg circuits for cryogenic operation in the all-electric aircraft

Elwakeel¹,

Feng²,

McNeill³

et al. 2022

11th International Conference on Power Electronics, Machines and Drives (PEMD 2022)

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Commercial all-electric aircraft are projected to be flying as early as 2035, where hydrogen is selected to supply fuel and coolant. The cryogenic aircraft's powertrain includes the turbines, generators, power electronics and fan motors. As most of the powertrain is located at cryogenic temperature, it is preferable to co-locate the power electronics in the same region to reduce the engineering system's complexity. Silicon super-junction MOSFETs are known for their high efficiency, thus lower cooling requirements at cryogenic temperature. However, in phase-leg circuits, the behaviour of the MOSFET's intrinsic diode, and its output capacitance are challenging. These issues can be addressed by using the MOSFET with ancillary power devices to realise diode deactivation. This paper compares different permutations of intrinsic diode deactivation devices at room temperature and cryogenic temperature. The paper presents a demonstrator phase-leg built with different ancillary power devices. It is operated from a DC voltage of 270 V, and supplies a phase current of up to 10 A.

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A High-Efficiency Super-Junction MOSFET based Inverter-Leg Configuration using a Dual-Mode Switching Technique

Cited by 3 publications

References 11 publications

Study of Power Devices for Use in Phase-Leg at Cryogenic Temperature

Study of Power Devices for Use in Phase-Leg at Cryogenic Temperature

Control of Incoming Drain Currents Drawn by Super-Junction MOSFETs in Voltage Source Bridge-Legs

Comparison of phase-leg circuits for cryogenic operation in the all-electric aircraft

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