The Experts below are selected from a list of 6039 Experts worldwide ranked by ideXlab platform
Xiong Du - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Design of an RC Snubber Circuit to Suppress False Triggering Oscillation for GaN Devices in Half-Bridge Circuits
IEEE Transactions on Power Electronics, 2020Co-Authors: Jian Chen, Jian Huang, Qingqing He, Xiong DuAbstract:Wide bandgap devices such as gallium nitride (GaN) devices are being widely used due to their low on-resistance and parasitic parameters that can improve system performance compared to Si mosfets. However, these advantages mentioned above can sometimes lead to unexpected behavior in practical systems, such as false triggering oscillation. False triggering oscillation may cause overshoot, electromagnetic interference, shoot-through, and even device damage, which seriously affects the performance of the system. In this paper, an RC snubber circuit is proposed to suppress false triggering oscillation in a half-Bridge circuit, and the design method of the RC parameters is proposed. The proposed oscillation suppression method is simpler, easier to implement, and more effective than the active gate driver. In addition, it can provide guidance for oscillation suppression design in high-order systems. First, the double pulse circuit is used as an example to analyze false triggering oscillation and its high-frequency equivalent circuit is obtained. Then, the RC region is established by scrutinizing the characteristic equations via a root locus method. The RC snubber circuit has better oscillation suppression effect when the RC parameters are within the region rather than outside the region. Finally, the RC region designed by the proposed method is verified by simulation and experiment results, and the proposed method indicates a substantial improvement of the switching characteristics of the controlled device at turn-off.
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An RC Snubber Circuit to Suppress False Triggering Oscillation for GaN Based Half-Bridge Circuits
2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2019Co-Authors: Jian Chen, Zhiqing Wang, Xiong DuAbstract:Due to low on-state resistance and parasitic parameters, GaN devices can cause false triggering oscillation in practical systems that will affect system performance. In this paper, an RC snubber circuit is proposed to suppress false triggering oscillation in a half-Bridge circuit and the design method of the RC parameters is proposed. The proposed oscillation suppression method is simpler, easier to implement, and more effective than the active gate driver. The proposed method is verified by experiment results. And it can provide guidance for oscillation suppression design in high-order systems.
Jian Chen - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Design of an RC Snubber Circuit to Suppress False Triggering Oscillation for GaN Devices in Half-Bridge Circuits
IEEE Transactions on Power Electronics, 2020Co-Authors: Jian Chen, Jian Huang, Qingqing He, Xiong DuAbstract:Wide bandgap devices such as gallium nitride (GaN) devices are being widely used due to their low on-resistance and parasitic parameters that can improve system performance compared to Si mosfets. However, these advantages mentioned above can sometimes lead to unexpected behavior in practical systems, such as false triggering oscillation. False triggering oscillation may cause overshoot, electromagnetic interference, shoot-through, and even device damage, which seriously affects the performance of the system. In this paper, an RC snubber circuit is proposed to suppress false triggering oscillation in a half-Bridge circuit, and the design method of the RC parameters is proposed. The proposed oscillation suppression method is simpler, easier to implement, and more effective than the active gate driver. In addition, it can provide guidance for oscillation suppression design in high-order systems. First, the double pulse circuit is used as an example to analyze false triggering oscillation and its high-frequency equivalent circuit is obtained. Then, the RC region is established by scrutinizing the characteristic equations via a root locus method. The RC snubber circuit has better oscillation suppression effect when the RC parameters are within the region rather than outside the region. Finally, the RC region designed by the proposed method is verified by simulation and experiment results, and the proposed method indicates a substantial improvement of the switching characteristics of the controlled device at turn-off.
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An RC Snubber Circuit to Suppress False Triggering Oscillation for GaN Based Half-Bridge Circuits
2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2019Co-Authors: Jian Chen, Zhiqing Wang, Xiong DuAbstract:Due to low on-state resistance and parasitic parameters, GaN devices can cause false triggering oscillation in practical systems that will affect system performance. In this paper, an RC snubber circuit is proposed to suppress false triggering oscillation in a half-Bridge circuit and the design method of the RC parameters is proposed. The proposed oscillation suppression method is simpler, easier to implement, and more effective than the active gate driver. The proposed method is verified by experiment results. And it can provide guidance for oscillation suppression design in high-order systems.
Qingqing He - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Design of an RC Snubber Circuit to Suppress False Triggering Oscillation for GaN Devices in Half-Bridge Circuits
IEEE Transactions on Power Electronics, 2020Co-Authors: Jian Chen, Jian Huang, Qingqing He, Xiong DuAbstract:Wide bandgap devices such as gallium nitride (GaN) devices are being widely used due to their low on-resistance and parasitic parameters that can improve system performance compared to Si mosfets. However, these advantages mentioned above can sometimes lead to unexpected behavior in practical systems, such as false triggering oscillation. False triggering oscillation may cause overshoot, electromagnetic interference, shoot-through, and even device damage, which seriously affects the performance of the system. In this paper, an RC snubber circuit is proposed to suppress false triggering oscillation in a half-Bridge circuit, and the design method of the RC parameters is proposed. The proposed oscillation suppression method is simpler, easier to implement, and more effective than the active gate driver. In addition, it can provide guidance for oscillation suppression design in high-order systems. First, the double pulse circuit is used as an example to analyze false triggering oscillation and its high-frequency equivalent circuit is obtained. Then, the RC region is established by scrutinizing the characteristic equations via a root locus method. The RC snubber circuit has better oscillation suppression effect when the RC parameters are within the region rather than outside the region. Finally, the RC region designed by the proposed method is verified by simulation and experiment results, and the proposed method indicates a substantial improvement of the switching characteristics of the controlled device at turn-off.
Jian Huang - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Design of an RC Snubber Circuit to Suppress False Triggering Oscillation for GaN Devices in Half-Bridge Circuits
IEEE Transactions on Power Electronics, 2020Co-Authors: Jian Chen, Jian Huang, Qingqing He, Xiong DuAbstract:Wide bandgap devices such as gallium nitride (GaN) devices are being widely used due to their low on-resistance and parasitic parameters that can improve system performance compared to Si mosfets. However, these advantages mentioned above can sometimes lead to unexpected behavior in practical systems, such as false triggering oscillation. False triggering oscillation may cause overshoot, electromagnetic interference, shoot-through, and even device damage, which seriously affects the performance of the system. In this paper, an RC snubber circuit is proposed to suppress false triggering oscillation in a half-Bridge circuit, and the design method of the RC parameters is proposed. The proposed oscillation suppression method is simpler, easier to implement, and more effective than the active gate driver. In addition, it can provide guidance for oscillation suppression design in high-order systems. First, the double pulse circuit is used as an example to analyze false triggering oscillation and its high-frequency equivalent circuit is obtained. Then, the RC region is established by scrutinizing the characteristic equations via a root locus method. The RC snubber circuit has better oscillation suppression effect when the RC parameters are within the region rather than outside the region. Finally, the RC region designed by the proposed method is verified by simulation and experiment results, and the proposed method indicates a substantial improvement of the switching characteristics of the controlled device at turn-off.
Praveen Jain - One of the best experts on this subject based on the ideXlab platform.
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instability analysis and oscillation suppression of enhancement mode gan devices in half Bridge Circuits
IEEE Transactions on Power Electronics, 2018Co-Authors: Kangping Wang, Laili Wang, Xu Yang, Praveen JainAbstract:This paper analyzes the problem of instability in enhancement-mode gallium nitride (GaN) transistors based half-Bridge Circuits. The instability may cause sustained oscillation, resulting in overvoltage, excessive electromagnetic interference (EMI), and even device breakdown. GaN devices operate in the saturation region when they conduct reversely during the dead time. Under the influence of parasitic parameters, the GaN-based half-Bridge circuit exhibits positive feedback under certain conditions, thus, resulting in sustained oscillation. A small-signal model is proposed to study this positive feedback phenomenon. Like the second-order under-damped system, damping ratio is defined to determine the system's stability. Based on the model, the influence of circuit parameters on instability is investigated and guidelines to suppress the oscillation are given. Reducing the common-source inductance, increasing the gate resistance of the inactive switch or connecting a diode in parallel to the inactive switch are some effective ways to suppress the oscillation. Finally, the analyses are verified by both simulation and experiment.