发明名称 |
Phase shift inverter, X-ray high-voltage device using same, X-ray CT device, and X-ray imaging device |
摘要 |
An inverter circuit allowing a single drive circuit to perform both tracking control for tracking resonance frequency fluctuations caused by load fluctuations, and power control, thereby reducing switching loss. An inverter drive circuit part obtains a phase difference between output current and output voltage directed to a load circuit connected to a midpoint of two arm circuits of the inverter circuit, and controls a phase of the driving signal directed to each semiconductor switch such that the phase difference becomes zero or a predetermined value, enabling an operating frequency of the inverter circuit part to track a resonance frequency of the load circuit, and enabling a current phase to be delayed with respect to a voltage phase, thereby achieving ZCS. Since the phase difference is used, an auxiliary circuit is not necessary for measuring a current value in proximity to the semiconductor switches.
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申请公布号 |
US8588371(B2) |
申请公布日期 |
2013.11.19 |
申请号 |
US200913127289 |
申请日期 |
2009.11.05 |
申请人 |
OGAWA MINA;ANDO ITARU;OHISHI KIYOSHI;SHINDO SHOUTARO;HITACHI MEDICAL CORPORATION;INSTITUTE OF NATIONAL COLLEGE OF TECHNOLOGY;NATIONAL UNIVERSITY COOPERATION NAGAOKA UNIVERSITY OF TECHNOLOGY |
发明人 |
OGAWA MINA;ANDO ITARU;OHISHI KIYOSHI;SHINDO SHOUTARO |
分类号 |
H05G1/10 |
主分类号 |
H05G1/10 |
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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