发明名称 |
Power converter for traction control and transportation system |
摘要 |
The following problem associated with a semiconductor device of silicon or the like having low band gap is solved by temperature estimation using voltage drop in such a semiconductor device having low accuracy and this complicates a circuit for temperature detection suitable for practical use or a configuration-for implementing a detection system. A power converter provided with an inverter circuit includes a semiconductor device whose band gap is larger than that of silicon and which has a range in which the temperature coefficient of voltage drop during conduction is positive. The power converter further includes a measurement condition setting circuit. This circuit adjusts the timing of the following measurement values used for temperature estimation at a device temperature estimation circuit to each other so that a measurement value of a voltage measurement circuit and a measurement value of a current measurement circuit become data obtained by measurement at the same time. |
申请公布号 |
EP2267876(A1) |
申请公布日期 |
2010.12.29 |
申请号 |
EP20100251131 |
申请日期 |
2010.06.23 |
申请人 |
HITACHI, LTD. |
发明人 |
TSUGAWA, DAI;ISHIKAWA, KATSUMI |
分类号 |
H02M1/32 |
主分类号 |
H02M1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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