Snubberless voltage sharing of series-connected insulated-gate devices by a novel gate control strategy
Snubberless voltage sharing of series-connected insulated-gate devices by a novel gate control strategy
复制标题
通过新颖的栅极控制策略实现串联绝缘栅极器件的无缓冲器电压共享
DOI：
10.1109/63.903998
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发表时间：
2001
影响因子：
6.7
通讯作者：
A. Raciti
中科院分区：
文献类型：
--
作者：
G. Belverde;A. Galluzzo;M. Melito;S. Musumeci;A. Raciti
金属氧化物半导体场效应晶体管 (MOSFET) 或绝缘栅双极晶体管 (IGBT) 等绝缘栅器件越来越多地用于高压功率转换器，其中对快速功率开关的要求不断增长。器件串联是管理高于单个器件阻断电压的电压的可行方法。此类应用的主要问题是保证稳态和开关瞬态期间器件之间的电压平衡。本文提出了一种新颖的方法，用于均衡开关瞬态期间的电压共享。该方法的主要优点在于避免了在输出功率侧和栅极侧使用缓冲电容器的传统方式。首先讨论了所提出的栅极驱动技术的应用，并与不同的解决方案进行了比较，然后通过应用于串联设备控制的实验测试进行了验证。最后，对两种不同配置的瞬态行为进行比较：具有高压阻断能力的单个开关，以及共同确保单个开关的电压阻断能力的一系列两个器件。实验证明，与所提出的控制电路一起使用的后一种配置比前一种配置具有更好的性能。
Insulated gate devices, such as metal oxide semiconductor field effect transistors (MOSFETs) or insulated gate bipolar transistors (IGBTs), are increasingly used in high-voltage power converters where a request for fast power switches is growing. Series connection of devices is a viable approach to manage voltages higher than the blocking voltage of the single device. The main problem in such an application is to guarantee the voltage balance across the devices both in steady-state and during switching transients. In this paper, a novel approach is presented, which is used to equalize the voltage sharing during the switching transients. The main advantages of the proposed method consist in avoiding the traditional use of the snubber capacitors, in the output power side, and in working on the gate side. The application of the proposed gate drive technique is firstly discussed and compared with different solutions, hence, validated by experimental tests applied to the control of series connected devices. Finally, a comparison is performed between the transient behaviors of two different configurations: a single switch with high-voltage blocking capability, and in alternative a series of two devices which together ensure the voltage blocking capability of the single switch. The better performances of the latter configuration, working with the proposed control circuit, over the former have been experimentally demonstrated.