Search Results - "Ui-Min Choi"

Power Cycling Test Methods for Reliability Assessment of Power Device Modules in Respect to Temperature Stress by Ui-Min Choi, Blaabjerg, Frede, Jorgensen, Soren

“…Power cycling test is one of the important tasks to investigate the reliability performance of power device modules in respect to temperature stress. From…”
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Study and Handling Methods of Power IGBT Module Failures in Power Electronic Converter Systems by Ui-Min Choi, Blaabjerg, Frede, Kyo-Beum Lee

“…Power electronics plays an important role in a wide range of applications in order to achieve high efficiency and performance. Increasing efforts are being…”
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Validation of Lifetime Prediction of IGBT Modules Based on Linear Damage Accumulation by Means of Superimposed Power Cycling Tests by Ui-Min Choi, Ke Ma, Blaabjerg, Frede

“…In this paper, the lifetime prediction of power device modules based on the linear damage accumulation is studied in conjunction with simple mission profiles…”
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Reliability Improvement of a T-Type Three-Level Inverter With Fault-Tolerant Control Strategy by Ui-Min Choi, Blaabjerg, Frede, Kyo-Beum Lee

“…This paper proposes a fault-tolerant control strategy for a T-type three-level inverter when an open-circuit fault occurs. The proposed method is explained by…”
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Advanced Accelerated Power Cycling Test for Reliability Investigation of Power Device Modules by Ui-Min Choi, Jørgensen, Søren, Blaabjerg, Frede

“…This paper presents an apparatus and methodology for an advanced accelerated power cycling test of insulated-gate bipolar transistor (IGBT) modules. In this…”
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Study on Effect of Junction Temperature Swing Duration on Lifetime of Transfer Molded Power IGBT Modules by Ui-Min Choi, Blaabjerg, Frede, Jorgensen, Soren

“…In this paper, the effect of junction temperature swing duration on lifetime of transfer molded power insulated gate bipolar transistor (IGBT) modules is…”
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Prediction and Validation of Wear-Out Reliability Metrics for Power Semiconductor Devices With Mission Profiles in Motor Drive Application by Ma, Ke, Choi, Ui-Min, Blaabjerg, Frede

“…Due to the continuous demands for highly reliable and cost-effective power conversion, quantified reliability performances of the power electronics converter…”
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Reliability Improvement of Power Converters by Means of Condition Monitoring of IGBT Modules by Ui-Min Choi, Blaabjerg, Frede, Jorgensen, Soren, Munk-Nielsen, Stig, Rannestad, Bjorn

“…Power electronic systems have gradually gained an important status in a wide range of industrial applications such as renewable generation, motor drives,…”
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Diagnosis and Tolerant Strategy of an Open-Switch Fault for T-Type Three-Level Inverter Systems by Ui-Min Choi, Kyo-Beum Lee, Blaabjerg, Frede

“…This paper proposes a new diagnosis method of an open-switch fault and fault-tolerant control strategy for T-type three-level inverter systems. The location of…”
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Separation of Wear-Out Failure Modes of IGBT Modules in Grid-Connected Inverter Systems by Choi, Ui-Min, Blaabjerg, Frede

“…Wear-out condition monitoring of IGBT modules with failure mode separation gives some benefits. First, it allows proactive maintenance plans. Further,…”
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Discontinuous PWM Strategy for Reliability and Efficiency Improvements of Single-Phase Five-Level T-type Inverter by Ryu, Taerim, Choi, Ui-Min

“…Reliability and efficiency improvements of PV inverters have a high potential to decrease the cost of PV energy. Discontinuous PWM is an effective method to…”
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Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter by Ui-Min Choi, June-Seok Lee, Blaabjerg, Frede, Kyo-Beum Lee

“…This paper presents an open-circuit fault detection method for a grid-connected neutral-point clamped (NPC) inverter system. Further, a fault-tolerant control…”
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Reliability-Oriented Application Method of Discontinuous PWM for Single-Phase Five-Level T-Type NPC Inverter by Ryu, Taerim, Choi, Ui-Min

“…Discontinuous pulsewidth modulation (DPWM) is generally used for improving the efficiency of inverters, but it reduces the power quality. Therefore, in…”
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New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems by Choi, Ui-Min, Lee, June-Seok, Lee, Kyo-Beum

“…This paper proposes a new modulation strategy that balances the neutral-point voltage for three-level neutral-clamped inverter systems. The proposed modulation…”
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Effect of Asymmetric Layout of IGBT Modules on Reliability of Motor Drive Inverters by Choi, Ui-Min, Vernica, Ionut, Blaabjerg, Frede

“…Power electronics inverters are one of the major failure sources in motor drive systems, and power devices are one of the main causes of the power electronics…”
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Control Strategy of Two Capacitor Voltages for Separate MPPTs in Photovoltaic Systems Using Neutral-Point-Clamped Inverters by Ui-Min Choi, Blaabjerg, Frede, Kyo-Beum Lee

“…The centralized topology with three-level inverters are widely used in photovoltaic (PV) systems due to their less installation costs and complexity. However,…”
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Simple Neutral-Point Voltage Control for Three-Level Inverters Using a Discontinuous Pulse Width Modulation by Choi, Ui-Min, Lee, Hyun-Hee, Lee, Kyo-Beum

“…This paper proposes a neutral-point voltage balancing method for a three-level inverter that uses discontinuous pulse width modulation (DPWM). The performance…”
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Comparative Evaluation of Efficiency and Reliability of Single-Phase Five-Level NPC Inverters for Photovoltaic Systems by Choi, Ui-Min, Ryu, Taerim

“…It is required to reduce the cost of PV energy to be competitive as an alternative energy source. The efficiency and reliability of PV inverters are important…”
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Method to Minimize the Low-Frequency Neutral-Point Voltage Oscillations With Time-Offset Injection for Neutral-Point-Clamped Inverters by Ui-Min Choi, Blaabjerg, Frede, Kyo-Beum Lee

“…This paper proposes a method to reduce the low-frequency neutral-point voltage oscillations. The neutral-point voltage oscillations are considerably reduced by…”
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Reliability-Oriented Optimal DPWM Strategy for Single-Phase Five-Level T-type Inverter in PV Systems by Ryu, Taerim, Choi, Ui-Min

“…Many efforts have been devoted to improving the reliability of PV inverters with a focus on reliability-critical components such as power devices and…”
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