发明名称 |
Semiconductor switch and power conversion apparatus |
摘要 |
According to one embodiment, a switch includes a first element with a first withstand voltage, a second element whose withstand voltage is lower than the first withstand voltage, a diode which is connected between a positive electrode of the first element and a positive electrode of the second element in such a manner that a direction from the positive electrode of the second element toward the positive electrode of the first element is a forward direction and whose withstand voltage is equal to the first withstand voltage, a negative electrode of the first element and a negative electrode of the second element being connected, and a circuit configured to apply a positive voltage to the positive terminal output a pulse lower than the first withstand voltage when the first element goes off. |
申请公布号 |
US9257248(B2) |
申请公布日期 |
2016.02.09 |
申请号 |
US201213685908 |
申请日期 |
2012.11.27 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
Mochikawa Hiroshi;Kuzumaki Atsuhiko;Tsuda Junichi;Koyama Yushi |
分类号 |
H03B1/00;H03K3/00;H01H47/00;G05F3/02;H03K17/00 |
主分类号 |
H03B1/00 |
代理机构 |
Holtz, Holtz & Volek PC |
代理人 |
Holtz, Holtz & Volek PC |
主权项 |
1. A semiconductor switch comprising:
a main element which has an inverse conducting capability and is a voltage driving switching element with a high withstand voltage; a backflow prevention element whose withstand voltage is lower than that of the main element; a high-speed free-wheeling diode which is connected between a positive terminal and a negative terminal in such a manner that a direction from the negative terminal toward the positive terminal is a forward direction and which has a withstand voltage equal to that of the main element, a negative electrode of the main element and a negative electrode of the backflow prevention element being connected to each other, a positive electrode of the main element being used as the positive terminal, and a positive electrode of the backflow prevention element being used as the negative terminal; and an auxiliary voltage applying circuit which is connected in a direction in which a positive voltage is applied to the positive electrode of the main element and which generates at least a voltage pulse lower than the withstand voltage of the main element and outputs the voltage pulse almost in synchronization with the time when the main element goes off. |
地址 |
Tokyo JP |