US5856712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uninterruptible power supply method
Assignee: I-HITS LABORATORY
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Filing: 1997-04-22
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Granted: 1999-01-05
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Expires: 2017-04-22
Abstract
Abstract A method for providing an uninterruptible power supply to a load both at ordinary times and in an emergency. At ordinary times, commercial AC input power is modulated into high-frequency AC power, which is then applied to a primary winding of a high-frequency transformer having the primary winding, a secondary winding and a tertiary winding. High-frequency AC power induced in the secondary winding from the primary winding is demodulated into AC output power, which is then supplied to the load. High-frequency AC power induced in the tertiary winding from the primary winding is rectified into DC power, with which a storage battery is charged. In an emergency, DC power from the storage battery is converted into high-frequency AC power, which is then applied to the tertiary winding. High-frequency AC power induced in the secondary winding from the tertiary winding is averaged, thereby producing AC output power, then the AC output power is supplied to the load.
Inventors
- 👤 Yasunobu Suzuki
- 👤 Isao Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:13
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/062; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02J9/067; H02M7/42; H02M7/44; H02M7/48; H02M7/4807
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
198 words
A method of providing an uninterruptible supply of power to a load during an ordinary times mode and in an emergency mode, said method comprising, during the ordinary times mode, the steps of: modulating commercial AC input power into high-frequency AC power; applying the high-frequency AC power to a primary winding of a high-frequency transformer having the primary winding, a secondary winding and a tertiary winding; demodulating high-frequency AC power induced in the secondary winding from the primary winding into AC output power which is approximately equivalent to the commercial AC input power and has a waveform similar to that of the commercial AC input power; supplying the AC output power to the load; rectifying high-frequency AC power induced in the tertiary winding from the primary winding into DC power; and charging a storage battery with the DC power; and said method further comprising, during the emergency mode, the steps of: converting DC power from the storage battery into high-frequency AC power; applying the high-frequency AC power to the tertiary winding; averaging high-frequency AC power induced in the secondary winding from the tertiary winding, thereby producing AC output power; and supplying the AC output power to the load.
Claim 2
Independent Claim
198 words
A method of providing an uninterruptible supply of power to a load during an ordinary times mode and in an emergency mode, said method comprising, during the ordinary times mode, the steps of: modulating commercial AC input power into high-frequency AC power; applying the high-frequency AC power to a primary winding of a high-frequency transformer having the primary winding, a secondary winding and a tertiary winding; demodulating high-frequency AC power induced in the secondary winding from the primary winding into AC output power which is approximately equivalent to the commercial AC input power and has a waveform similar to that of the commercial AC input power; supplying the AC output power to the load; rectifying high-frequency AC power induced in the tertiary winding from the primary winding into DC power; and charging a storage battery with the DC power; and said method further comprising, during the emergency mode, the steps of: converting DC power from the storage battery into high-frequency AC power; applying the high-frequency AC power to the tertiary winding; averaging high-frequency AC power induced in the secondary winding from the tertiary winding, thereby producing AC output power; and supplying the AC output power to the load.
Claim 3
Dependent Claim
60 words
A method as claimed in claim 1, wherein each of the steps of said modulating commercial AC input power into high-frequency AC power, said demodulating high-frequency AC power into AC output power, said rectifying high-frequency AC power into DC power, said converting DC power into high-frequency AC power, and said averaging high-frequency AC power is accomplished by using semiconductor switches.
Claim 4
Dependent Claim
15 words
A method as in claim 2, wherein drive-pulse phases of the semiconductor switches are modulated.
Claim 5
Dependent Claim
17 words
A method as in claim 3, wherein drive-pulse phases of the semiconductor switches are modulated and inverted.
Claim 6
Dependent Claim
22 words
A method as in claim 3, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 7
Dependent Claim
15 words
A method as in claim 2, wherein drive-pulse phases of the semiconductor switches are inverted.
Claim 8
Dependent Claim
22 words
A method as in claim 6, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 9
Dependent Claim
17 words
A method as in claim 2, wherein drive-pulse phases of the semiconductor switches are modulated and inverted.
Claim 10
Dependent Claim
22 words
A method as in claim 8, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 11
Dependent Claim
22 words
A method as in claim 2, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 12
Dependent Claim
31 words
A method as in claim 2, wherein a voltage of the AC output power supplied to the load both during the ordinary times mode and during the emergency mode is adjusted.
Claim 13
Dependent Claim
24 words
A method as claimed in claim 11, wherein the adjustment of the voltage of the AC output power is achieved by using semiconductor switches.
Claim 14
Dependent Claim
24 words
A method as in claim 2, wherein the high-frequency AC power applied to the tertiary winding during the emergency mode is square wave AC.
Claim 15
Dependent Claim
31 words
A method as in claim 1, wherein a voltage of the AC output power supplied to the load both during the ordinary times mode and during the emergency mode is adjusted.
Claim 16
Dependent Claim
24 words
A method as claimed in claim 3, wherein the adjustment of the voltage of the AC output power is achieved by using semiconductor switches.
Claim 17
Dependent Claim
24 words
A method as in claim 15, wherein the high-frequency AC power applied to the tertiary winding during the emergency mode is square wave AC.
Claim 18
Dependent Claim
15 words
A method as in claim 15, wherein drive-pulse phases of the semiconductor switches are modulated.
Claim 19
Dependent Claim
15 words
A method as in claim 15, wherein drive-pulse phases of the semiconductor switches are inverted.
Claim 20
Dependent Claim
17 words
A method as in claim 15, wherein drive-pulse phases of the semiconductor switches are modulated and inverted.
Claim 21
Dependent Claim
22 words
A method as in claim 15, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 22
Dependent Claim
24 words
A method as in claim 14, wherein the high-frequency AC power applied to the tertiary winding during the emergency mode is square wave AC.
Claim 23
Dependent Claim
15 words
A method as in claim 14, wherein drive-pulse phases of the semiconductor switches are modulated.
Claim 24
Dependent Claim
15 words
A method as in claim 14, wherein drive-pulse phases of the semiconductor switches are inverted.
Claim 25
Dependent Claim
17 words
A method as in claim 3, wherein drive-pulse phases of the semiconductor switches are modulated and inverted.
Claim 26
Dependent Claim
22 words
A method as in claim 14, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 27
Dependent Claim
24 words
A method as in claim 1, wherein the high-frequency AC power applied to the tertiary winding during the emergency mode is square wave AC.
Claim 28
Dependent Claim
52 words
A method as claimed in claim 5, further comprising the steps of producing a sinusoidal output as the AC output power by smoothing, through the use of semiconductor switches, average values of positive and negative high-frequency square wave pulses of square wave AC induced in the secondary winding from the tertiary winding.
Claim 29
Dependent Claim
15 words
A method as in claim 27, wherein drive-pulse phases of the semiconductor switches are modulated.
Claim 30
Dependent Claim
15 words
A method as in claim 27, wherein drive-pulse phases of the semiconductor switches are inverted.
Claim 31
Dependent Claim
17 words
A method as in claim 26, wherein drive-pulse phases of the semiconductor switches are modulated and inverted.
Claim 32
Dependent Claim
17 words
A method as in claim 27, wherein drive-pulse phases of the semiconductor switches are modulated and inverted.
Claim 33
Dependent Claim
22 words
A method as in claim 27, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
Claim 34
Dependent Claim
15 words
A method as in claim 26, wherein drive-pulse phases of the semiconductor switches are modulated.
Claim 35
Dependent Claim
15 words
A method as in claim 26, wherein drive-pulse phases of the semiconductor switches are inverted.
Claim 36
Dependent Claim
22 words
A method as in claim 26, wherein each of the semiconductor switches is a bi-directional semiconductor switch or a uni-directional semiconductor switch.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 2002-01-04 | 2002-07-06 | 2003-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-04 | 2006-07-06 | 2007-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-04 | 2010-07-06 | 2011-01-05 | $7700.00 | Window Closed / Lapsed |