Design optimization of quasi-active gate control for series-connected power devices

Teerakawanich, Nithiphat and Johnson, Christopher Mark (2014) Design optimization of quasi-active gate control for series-connected power devices. IEEE Transactions on Power Electronics, 29 (6). pp. 2705-2714. ISSN 1941-0107

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This paper presents a new gate drive circuit for driving a series string of IGBTs. The proposed quasi active gate control (QAGC) circuit is simple to implement as it composes of only a few passive components in addition to a standard gate driver. No separate isolation power supply is required for the upper devices in the stack. The proposed QAGC circuit provides an effective way to drive the power devices and control static and dynamic voltage sharing to the devices at the same time. The theoretical switching operation and the oscillation stability analysis allow criteria for component selection to be established. Limitations of the QAGC circuit is also identified. The modification of the circuit to support more power devices in the series stack is discussed with the aid of the simulation results. The switching operation of the circuit is validated from the experimental results using 2 IGBTs connected in series. The circuit shows a satisfied switching operation with well-controlled dynamic and static voltage sharing and comparable gate voltage between the coupled devices.

Item Type: Article
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Keywords: Active gate control, power devices, series connection, gate driver, voltage balancing circuit
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number:
Depositing User: Burns, Rebecca
Date Deposited: 23 Jan 2018 11:23
Last Modified: 04 May 2020 20:14

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