US4742535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverter type X-ray apparatus
Assignee: Hitachi Healthcare Manufacturing Ltd
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Filing: 1985-12-23
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Granted: 1988-05-03
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Expires: 2005-12-23
Abstract
Abstract Disclosed is an inverter type X-ray apparatus comprising a DC-DC converter for converting a DC voltage into a different DC voltage, an inverter for inverting an output voltage of the DC-DC converter into an AC voltage, a high voltage transformer for transforming an output voltage of the inverter into a higher voltage, a rectifier for converting an AC output voltage of the transformer into a DC voltage, and an X-ray tube to which an output voltage of the rectifier is applied. In the apparatus, the DC-DC converter includes a reactor, a switching element and a capacitor which are interconnected so that the DC-DC converter can generate an output voltage higher or lower than an input voltage.
Inventors
- 👤 Hirofumi Hino
- 👤 Hideki Uemura
- 👤 Kazuo Kaneko
- 👤 Takanobu Hatakeyama
- 👤 Kazuo Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:55
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/46; H05G1/10; H05G1/20
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
167 words
An inverter type X-ray apparatus comprising: rectifying means for converting an AC power signal from an AC power source into an input DC voltage, a DC-DC converter for converting said input DC voltage into an output DC voltage different from said input DC voltage, said DC-DC converter including voltage control means for controlling said DC-DC converter such that said output DC voltage is higher than said input DC voltage, an inverter means for inverting said output DC voltage of said DC-DC converter into an AC voltage, rectifying control means for controlling said rectifying means such that said input DC voltage of said DC-DC converter is increased or decreased based on an output of said rectifying control means, a high voltage transformer for transforming an output voltage of said inverter into a higher voltage, a rectifier circuit means for converting an output voltage of said high voltage transformer into an DC voltage, and an X-ray tube to which an output voltage of said rectifier circuit means is applied.
Claim 2
Dependent Claim
167 words
An inverter type X-ray apparatus comprising: rectifying means for converting an AC power signal from an AC power source into an input DC voltage, a DC-DC converter for converting said input DC voltage into an output DC voltage different from said input DC voltage, said DC-DC converter including voltage control means for controlling said DC-DC converter such that said output DC voltage is higher than said input DC voltage, an inverter means for inverting said output DC voltage of said DC-DC converter into an AC voltage, rectifying control means for controlling said rectifying means such that said input DC voltage of said DC-DC converter is increased or decreased based on an output of said rectifying control means, a high voltage transformer for transforming an output voltage of said inverter into a higher voltage, a rectifier circuit means for converting an output voltage of said high voltage transformer into an DC voltage, and an X-ray tube to which an output voltage of said rectifier circuit means is applied.
Claim 3
Dependent Claim
169 words
An inverter type X-ray apparatus comprising: rectifying means for converting an AC power signal from an AC power source into an input DC voltage, a DC-DC converter for converting said input DC voltage into an output DC voltage different from said input DC voltage, said DC-DC converter including voltage control means for controlling said DC-DC converter such that said output voltage is one of higher and lower than said input DC voltage, an inverter means for inverting said output DC voltage of said DC-DC converter into an AC voltage, rectifying control means for controlling said rectifying means such that said input DC voltage of said DC-DC converter is increased or decreased based on an output of said rectifying control means, a high voltage transformer for transforming an output voltage of said inverter into a higher voltage, a rectifier circuit means for converting an output voltage of said high voltage transformer into a DC voltage, an X-ray tube to which an output voltage of said rectifier circuit means is applied.
Claim 4
Dependent Claim
169 words
An inverter type X-ray apparatus comprising: rectifying means for converting an AC power signal from an AC power source into an input DC voltage, a DC-DC converter for converting said input DC voltage into an output DC voltage different from said input DC voltage, said DC-DC converter including voltage control means for controlling said DC-DC converter such that said output voltage is one of higher and lower than said input DC voltage, an inverter means for inverting said output DC voltage of said DC-DC converter into an AC voltage, rectifying control means for controlling said rectifying means such that said input DC voltage of said DC-DC converter is increased or decreased based on an output of said rectifying control means, a high voltage transformer for transforming an output voltage of said inverter into a higher voltage, a rectifier circuit means for converting an output voltage of said high voltage transformer into a DC voltage, an X-ray tube to which an output voltage of said rectifier circuit means is applied.
Claim 5
Dependent Claim
61 words
An inverter type X-ray apparatus as claimed in claim 1, wherein said voltage control means includes a reactor, a switching element, a diode and a capacitor which are interconnected such that, during an on-period of said switching element, current is supplied to said reactor, while during an off-period of said switching element, current is supplied from said reactor to said capacitor.
Claim 6
Dependent Claim
61 words
An inverter type X-ray apparatus as claimed in claim 2, wherein said voltage control means includes a reactor, a switching element, a diode and a capacitor which are interconnected such that, during an on-period of said switching element, current is supplied to said reactor, while during an off-period of said switching element, current is supplied from said reactor to said capacitor.
Claim 7
Dependent Claim
30 words
An inverter type X-ray apparatus as claimed in claim 1, further comprising: feedback control means connected to said DC-DC converter for stabilizing said output DC voltage of said DC-DC converter.
Claim 8
Dependent Claim
30 words
An inverter type X-ray apparatus as claimed in claim 2, further comprising: feedback control means connected to said DC-DC converter for stabilizing said output DC voltage of said DC-DC converter.
Claim 9
Dependent Claim
17 words
An inverter type X-ray apparatus as claimed in claim 1, wherein said inverter comprises a full-bridge inverter.
Claim 10
Dependent Claim
17 words
An inverter type X-ray apparatus as claimed in claim 2, wherein said inverter comprises a full-bridge inverter.
Claim 11
Dependent Claim
17 words
An inverter type X-ray apparatus as claimed in claim 1, wherein said inverter comprises a push-pull inverter.
Claim 12
Dependent Claim
17 words
An inverter type X-ray apparatus as claimed in claim 2, wherein said inverter comprises a push-pull inverter.
Claim 13
Dependent Claim
17 words
An inverter type X-ray apparatus as claimed in claim 1, wherein said inverter comprises a half-bridge inverter.
Claim 14
Dependent Claim
17 words
An inverter type X-ray apparatus as claimed in claim 2, wherein said inverter comprises a half-bridge inverter.
Claim 15
Dependent Claim
24 words
An inverter type X-ray apparatus as claimed in claim 1, wherein said rectifying means includes a smoothing circuit for smoothing said input DC voltage.
Claim 16
Dependent Claim
24 words
An inverter type X-ray apparatus as claimed in claim 2, wherein said rectifying means includes a smoothing circuit for smoothing said input DC voltage.
Claim 17
Dependent Claim
26 words
An inverter type X-ray apparatus according to claim 1, wherein said rectifying control means includes means for controlling the firing angle α of said rectifying means.
Claim 18
Dependent Claim
23 words
An inverter type X-ray apparatus according to claim 2, wherein said rectifying control means controls the firing angle α of said rectifying means.
References Cited (Backward Citations)
US4247888A
Cited
US4533986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |