A Low-Loss Medium-Voltage Inverter Applying Series Connected General Purpose 1.2 kV Insulated Gate Bipolar Transistors with Accurate Voltage Balancing Techniques

Polarization and Depolarization Current (PDC) testing is a non-destructive dielectric testing method to determine the conductivity and moisture content of the insulator. This paper presents the application of microprocessor in HVDC (High Voltage Direct Current) switch to switch “ON” and “OFF” the PDC measurement circuit. This paper also reviewed the involvement and also the function of microprocessor to control the switching circuit and also the function of auxiliary circuit in controlling the voltage balancing of each device in the IGBT (Insulated Gate Bipolar Transistor) circuit. A simple and reliable technique of voltage-balancing circuit for the series operation of devices is presented to overcome the unbalance load and it is well controlled by the microprocessor circuit. The operation principle and analysis are presented and tested on 2 series-connected of 600-V/5-A insulated gate bipolar transistors to handle 1-kV/400-A switching for 10,000 seconds.

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Simulation of Heating of an Oil-Cooled Insulated Gate Bipolar Transistors Converter Model

10.21236/ada428067 ◽

2004 ◽

Author(s):

Gregory K. Ovrebo

Keyword(s):

Bipolar Transistors ◽

Insulated Gate Bipolar Transistors

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Research on Small Square PCB Rogowski Coil Measuring Transient Current in the Power Electronics Devices

Sensors ◽

10.3390/s19194176 ◽

2019 ◽

Vol 19 (19) ◽

pp. 4176 ◽

Cited By ~ 1

Author(s):

Chaoqun Jiao ◽

Juan Zhang ◽

Zhibin Zhao ◽

Zuoming Zhang ◽

Yuanliang Fan

Keyword(s):

Power Electronics ◽

Printed Circuit Board ◽

Electronic Devices ◽

Rogowski Coil ◽

Bipolar Transistors ◽

Circuit Board ◽

Power Electronic ◽

Insulated Gate Bipolar Transistors ◽

Printed Circuit ◽

Internal Structures

With the development of China’s electric power, power electronics devices such as insulated-gate bipolar transistors (IGBTs) have been widely used in the field of high voltages and large currents. However, the currents in these power electronic devices are transient. For example, the uneven currents and internal chip currents overshoot, which may occur when turning on and off, and could have a great impact on the device. In order to study the reliability of these power electronics devices, this paper proposes a miniature printed circuit board (PCB) Rogowski coil that measures the current of these power electronics devices without changing their internal structures, which provides a reference for the subsequent reliability of their designs.

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Sensorless Control of Voltage Peaks in Class-E Single-Ended Resonant Inverter for Induction Heating Rice Cooker

Energies ◽

10.3390/en14154545 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4545

Author(s):

Yongseung Oh ◽

Jaeeul Yeon ◽

Jayoon Kang ◽

Ilya Galkin ◽

Wonsoek Oh ◽

...

Keyword(s):

High Pressure ◽

Breakdown Voltage ◽

Induction Heating ◽

Control Method ◽

Supply Voltage ◽

Bipolar Transistors ◽

Insulated Gate Bipolar Transistors ◽

Voltage Fluctuations ◽

Resonant Inverter ◽

Do So

Single-ended (SE) resonant inverters are widely used as power converters for high-pressure rice cooker induction, with 1200 V insulated-gate bipolar transistors (IGBTs) being used as switching devices for kW-class products. When voltage fluctuations occur at the input stage of an SE resonant inverter, the resonant voltage applied to the IGBT can be directly affected, potentially exceeding the breakdown voltage of the IGBT, resulting in its failure. Consequently, the resonant voltage should be limited to below a safety threshold—hardware resonant voltage limiting methods are generally used to do so. This paper proposes a sensorless resonant voltage control method that limits the increase in the resonant voltage caused by overvoltage or supply voltage fluctuations. By calculating and predicting the resonance voltage through the analysis of the resonance circuit, the resonance voltage is controlled not to exceed the breakdown voltage of the IGBT. The experimental results of a 1.35 kW SE resonant inverter for a high-pressure induction heating rice cooker were used to verify the validity of the proposed sensorless resonant voltage limiting method.

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