CN106961146B - Uninterruptible power supply and control power supply circuit thereof - Google Patents
Uninterruptible power supply and control power supply circuit thereof Download PDFInfo
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- CN106961146B CN106961146B CN201610011603.0A CN201610011603A CN106961146B CN 106961146 B CN106961146 B CN 106961146B CN 201610011603 A CN201610011603 A CN 201610011603A CN 106961146 B CN106961146 B CN 106961146B
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- 238000004804 winding Methods 0.000 claims abstract description 94
- 239000003990 capacitor Substances 0.000 claims description 33
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- H02J7/022—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention provides an uninterruptible power supply and a control power supply circuit thereof, wherein the uninterruptible power supply comprises a first transformer, an inverter electrically connected with the secondary side of the first transformer, an inverter controller, a second transformer, a controllable charger electrically connected with the primary side of the second transformer and a charger controller. The control power supply circuit comprises at least one secondary winding wound on the secondary side of the first transformer, at least one secondary winding corresponding to the at least one secondary winding and wound on the secondary side of the second transformer, and a rectifying circuit for rectifying alternating currents generated in the at least one secondary winding wound on the secondary side of the first transformer and the at least one secondary winding wound on the secondary side of the second transformer to provide required working voltages for the inverter controller and the charger controller. The control power supply circuit has low cost and low power consumption.
Description
Technical Field
The invention relates to the field of electronic circuits, in particular to an uninterruptible power supply and a control power supply circuit thereof.
Background
Fig. 1 is a circuit diagram of an uninterruptible power supply 10, and the uninterruptible power supply 10 includes a discharge circuit for converting a direct current supplied from a direct current power supply 11 into a power frequency alternating current, and a charging circuit for charging the direct current power supply 11 with commercial power or the power frequency alternating current. As shown in fig. 1, the discharge circuit includes a DC-DC converter 12 connected to a direct-current power supply 11, and an output terminal of the DC-DC converter 12 is connected to an alternating-current output terminal Vout through a first transformer 18, a bridge rectifier circuit 13, an inverter 14, and a relay K2 in this order. The discharge circuit further includes a converter controller 121 for controlling the DC-DC converter 12 and an inverter controller 141 for controlling the inverter 14. The charging circuit comprises a controllable charger 15, an input end of the controllable charger 15 is connected to the alternating current output end Vout, and an output end thereof is connected to two ends of the direct current power supply 11 through a second transformer 19 and a half-wave rectifying circuit in sequence. The charging circuit further comprises a charger controller 151 for controlling the controllable charger 15. An ac power source Vin (e.g., commercial power) is connected to the ac output terminal Vout through relays K1, K2 in sequence. The ups 10 also includes a relay controller 161 for controlling the switching states of the relays K1, K2.
In the uninterruptible power supply 10 shown in fig. 1, in order to continuously and stably supply the first dc voltage VCC to the charger controller 151 and the second dc voltage VDD to the inverter controller 141, the converter controller 121 and the relay controller 161, a flyback power supply system 17 is generally added to the uninterruptible power supply 10 to supply the required dc voltages VCC and VDD.
The flyback power supply system 17 employs a large number of electronic components, which increases the cost and power consumption of the ups 10. Therefore, there is a need for an uninterruptible power supply and a control power supply circuit with reduced cost and reduced power consumption.
Disclosure of Invention
In view of the above technical problems in the prior art, the present invention provides a control power supply circuit for an uninterruptible power supply, where the uninterruptible power supply includes:
a discharge circuit for converting direct current supplied from a direct current power supply into power frequency alternating current, the discharge circuit including a first transformer, an inverter electrically connected to a secondary side of the first transformer, and an inverter controller for controlling the inverter;
a charging circuit that charges the dc power supply with commercial power or industrial frequency ac power, the charging circuit including a second transformer, a controllable charger electrically connected to a primary side of the second transformer, and a charger controller for controlling the controllable charger;
the control power supply circuit includes:
at least one secondary winding wound on a secondary side of the first transformer;
at least one secondary winding corresponding to the at least one secondary winding and wound on the secondary side of the second transformer; and
a rectifier circuit for rectifying the alternating current generated in the at least one secondary winding wound on the secondary side of the first transformer and the at least one secondary winding wound on the secondary side of the second transformer to provide the inverter controller and the charger controller with a required operating voltage.
Preferably, the at least one secondary winding wound on the secondary side of the first transformer includes a first secondary winding, the at least one secondary winding wound on the secondary side of the second transformer includes a second secondary winding, the rectifier circuit includes a first rectifier circuit that rectifies alternating current in the first secondary winding, and a second rectifier circuit that rectifies current in the second secondary winding, and output ends of the first rectifier circuit and the second rectifier circuit are connected in parallel.
Preferably, the number of turns of the first secondary winding is selected so that the first rectifying circuit outputs the first dc voltage, and the number of turns of the second secondary winding is selected so that the second rectifying circuit outputs the first dc voltage.
Preferably, the first rectifying circuit includes a first diode and a first capacitor, the second rectifying circuit includes a second diode and the first capacitor, wherein one end of the first secondary winding and one end of the second secondary winding are connected to one end of the first capacitor through the first diode and the second diode, respectively, and the other end of the first secondary winding and the other end of the second secondary winding are both connected to the other end of the first capacitor.
Preferably, the at least one secondary winding wound on the secondary side of the first transformer further comprises a third secondary winding; the at least one secondary winding wound on the secondary side of the second transformer further comprises a fourth secondary winding corresponding to the third secondary winding; the rectifier circuit further comprises a third rectifier circuit for rectifying alternating current in the third secondary winding and a fourth rectifier circuit for rectifying alternating current in the fourth secondary winding, and output ends of the third rectifier circuit and the fourth rectifier circuit are connected in parallel.
Preferably, the number of turns of the third secondary winding is selected so that the third rectifying circuit outputs the second dc voltage, and the number of turns of the fourth secondary winding is selected so that the fourth rectifying circuit outputs the second dc voltage.
Preferably, the third rectifying circuit includes a third diode and a second capacitor, and the fourth rectifying circuit includes a fourth diode and the second capacitor, wherein one end of the third secondary winding and one end of the fourth secondary winding are connected to one end of the second capacitor through the third diode and the fourth diode, respectively, and the other end of the third secondary winding and the other end of the fourth secondary winding are both connected to the other end of the second capacitor.
An embodiment of the present invention further provides an uninterruptible power supply, which includes:
a discharge circuit for converting direct current supplied from a direct current power supply into power frequency alternating current, the discharge circuit including a first transformer, an inverter electrically connected to a secondary side of the first transformer, and an inverter controller for controlling the inverter;
a charging circuit that charges the dc power supply with commercial power or industrial frequency ac power, the charging circuit including a second transformer, a controllable charger electrically connected to a primary side of the second transformer, and a charger controller for controlling the controllable charger; and
the power supply circuit is controlled as described above.
Preferably, the uninterruptible power supply further includes: a DC-DC converter having an input terminal connected to the DC power supply and an output terminal connected to the primary winding of the first transformer; and a converter controller for controlling the DC-DC converter.
Preferably, in the battery mode, the converter controller and the charger controller alternately perform the following two steps: step S11, controlling the DC-DC converter to work and the controllable charger to not work, so that the voltage on the DC bus of the uninterruptible power supply is increased from zero to a peak voltage, and the rectifying circuit provides the required working voltage; and step S12, controlling the DC-DC converter not to work and the controllable charger to work, so that the voltage on the direct current bus is reduced from the peak voltage to zero, and the rectifying circuit provides the required working voltage.
Preferably, in the online mode, the charger controller controls the controllable charger to operate, so that the rectifying circuit provides a required operating voltage.
The control power supply circuit has fewer electronic components, and is low in cost and low in power consumption.
The uninterrupted power supply of the invention has no flyback power supply system, saves cost, reduces power consumption and can continuously and stably provide required direct current voltage.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings, in which:
fig. 1 is a circuit diagram of an uninterruptible power supply of the prior art.
Fig. 2 is a circuit diagram of an ups according to a preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by embodiments with reference to the accompanying drawings.
Fig. 2 is a circuit diagram of an ups according to a preferred embodiment of the present invention, which is substantially the same as fig. 1 except that the ups 20 does not have the flyback power supply system 17, and the ups 20 has the control power supply circuit 27. As shown in fig. 2, the control power supply circuit 27 includes a secondary winding 282 wound on the secondary side of the first transformer 28, a half-wave rectifier circuit 2822 connected across the secondary winding 282, a secondary winding 292 wound on the secondary side of the second transformer 29, and a half-wave rectifier circuit 2922 connected across the secondary winding 292. The output terminals of the half- wave rectification circuits 2822 and 2922 are connected in parallel and used for providing the first direct-current voltage VCC for the charger controller 251. One ends of the secondary winding 282 and the secondary winding 292 are connected to one end of a capacitor (or a capacitor bank) C2 through a diode D1 and a diode D2, respectively, and the other ends of the secondary winding 282 and the secondary winding 292 are both connected to the other end of a capacitor C2, so that the half- wave rectifier circuits 2822, 2922 share the capacitor C2. The control power supply circuit 27 further includes a secondary winding 283 wound on the secondary side of the first transformer 28, a half-wave rectifier circuit 2833 connected across the secondary winding 283, a secondary winding 293 wound on the secondary side of the second transformer 29, and a half-wave rectifier circuit 2933 connected across the secondary winding 293. The output terminals of the half- wave rectifier circuits 2833, 2933 are connected in parallel, and are used for providing the second direct-current voltage VDD for the inverter controller 241. One ends of the secondary winding 283 and the secondary winding 293 are connected to one end of a capacitor (or a capacitor bank) C3 through a diode D3 and a diode D4, respectively, and the other ends of the secondary winding 283 and the secondary winding 293 are both connected to the other end of a capacitor C3, so that the capacitor C3 is shared by the half- wave rectifier circuits 2833, 2933.
How the ups 20 continuously and stably provides the required first dc voltage VCC and second dc voltage VDD will be described below with reference to its operation modes (battery mode and online mode).
(1) Battery mode
Step S11: the converter controller 221 is started by the direct current supplied from the direct current power supply 21, and then controls the DC-DC converter 22 to operate, thereby obtaining an alternating current on the secondary side of the first transformer 28. The bridge rectifier circuit 23 rectifies the alternating current across the secondary winding 281 of the first transformer 28 so that the voltage across the capacitor C1 between the dc bus rises from zero to a peak voltage. During this time, the half-wave rectifier circuit 2822 rectifies the alternating current across the secondary winding 282 of the first transformer 28, and the number of turns of the secondary winding 282 is selected so that the first direct current voltage VCC is output across the capacitor C2. Likewise, the half-wave rectifier 2833 rectifies the ac power across the secondary winding 283 of the first transformer 28, and the number of turns of the secondary winding 283 is selected so that the second dc voltage VDD is output across the capacitor C3. The first dc voltage VCC is used to supply power to the charger controller 251, and the second dc voltage VDD is used to supply power to the inverter controller 241, the converter controller 221, and the relay controller 261, so that the inverter controller 241 can control the inverter 24 to operate to output power-frequency ac power.
Step S12: the DC-DC converter 22 is controlled not to operate, and the inverter controller 241 controls the inverter 24 to operate, and the charger controller 251 controls the controllable charger 25 to operate, so that the voltage across the capacitor C1 is reduced from the peak voltage to zero, and alternating current is obtained on the secondary side of the second transformer 29. During this time, the half-wave rectifier circuit 2922 rectifies the alternating current across the secondary winding 292 of the second transformer 29, the number of turns of the secondary winding 292 being selected such that the same first direct current voltage VCC is output across the capacitor C2. Similarly, the half-wave rectifier circuit 2933 rectifies the alternating current across the secondary winding 293 of the second transformer 29, and the number of turns of the secondary winding 293 is selected so that the same second direct-current voltage VDD is output across the capacitor C3.
In the battery mode, steps S11 and S12 are executed alternately, that is, the DC-DC converter 22 and the controllable charger 25 are controlled to operate alternately in the above-mentioned operation mode, so that the capacitors C2 and C3 continuously and stably provide the required first DC voltage VCC and second DC voltage VDD across the capacitors C2 and C3, and the ac output terminal Vout outputs the power-frequency ac power.
(2) Online mode
The converter controller 221 is started by the DC power supplied from the DC power supply 21, and then controls the DC-DC converter 22 to operate, the secondary side of the first transformer 28 obtains ac power, and provides the first DC voltage VCC to the charger controller 251 after passing through the half-wave rectifier 2822, and provides the second DC voltage VDD to the relay controller 261 after being rectified by 2833. The relay controller 261 controls the relays K1, K2 to be closed, so that the ac power source Vin is electrically connected to the ac output terminal Vout and supplies the commercial power. The charger controller 251 controls the controllable charger 25 to operate, and since the input terminal of the controllable charger 25 is connected to the ac output terminal Vout, the first dc voltage VCC and the second dc voltage VDD are respectively obtained across the capacitors C2 and C3.
The uninterruptible power supply 20 of the present invention can continuously and stably supply a desired dc voltage in the battery mode, the online mode, and the switching process between the battery mode and the online mode. In addition, compared with the uninterrupted power supply 10, the uninterrupted power supply has the advantages of reduced components and cost and reduced power consumption.
The control power supply circuit 27 of the present invention is not limited to use in the ups 20, but may be used in other upss (e.g., in-line or off-line upss) that include the first transformer 28 and the second transformer 29 described above. In addition, in the battery mode, the controllable charger is controlled not to work all the time, and the DC-DC converter is controlled to work all the time, so that the power supply circuit 27 is controlled to provide the required DC voltage. In the online mode, the DC-DC converter is controlled to operate first, so that the control power supply circuit 27 provides the required DC voltage, and then the DC-DC converter is controlled to be inactive and the controllable charger is controlled to operate all the time, so that the control power supply circuit 27 provides the required DC voltage.
According to other embodiments of the present invention, the dc voltages required by the inverter controller 221 and the relay controller 261 may also be provided by the dc power supply 21.
According to other embodiments of the present invention, a full-wave rectifier circuit or a bridge rectifier circuit may be used instead of the half-wave rectifier circuit in the above embodiments.
According to other embodiments of the invention, the number of windings wound on the secondary side of the first transformer may be more or less than 2, and correspondingly, the number of windings wound on the secondary side of the second transformer may be more or less than 2.
Although the present invention has been described by way of preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the present invention.
Claims (11)
1. A control power supply circuit for an uninterruptible power supply, the uninterruptible power supply comprising:
a discharge circuit for converting direct current supplied from a direct current power supply into power frequency alternating current, the discharge circuit including a first transformer, an inverter electrically connected to a secondary side of the first transformer, and an inverter controller for controlling the inverter;
a charging circuit that charges the dc power supply with commercial power or industrial frequency ac power, the charging circuit including a second transformer, a controllable charger electrically connected to a primary side of the second transformer, and a charger controller for controlling the controllable charger;
characterized in that, the control power supply circuit includes:
at least one secondary winding wound on a secondary side of the first transformer;
at least one secondary winding corresponding to the at least one secondary winding and wound on the secondary side of the second transformer; and
a rectifier circuit for rectifying the alternating current generated in the at least one secondary winding wound on the secondary side of the first transformer and the at least one secondary winding wound on the secondary side of the second transformer to provide the inverter controller and the charger controller with a required operating voltage.
2. The control power supply circuit of claim 1, wherein said at least one secondary winding wound on the secondary side of said first transformer comprises a first secondary winding, said at least one secondary winding wound on the secondary side of said second transformer comprises a second secondary winding, said rectifier circuit comprises a first rectifier circuit rectifying alternating current in said first secondary winding, and a second rectifier circuit rectifying current in said second secondary winding, and the output terminals of said first rectifier circuit and said second rectifier circuit are connected in parallel.
3. The control power supply circuit of claim 2, wherein the number of turns of the first secondary winding is selected so that the first rectifying circuit outputs a first dc voltage, and the number of turns of the second secondary winding is selected so that the second rectifying circuit outputs the first dc voltage.
4. The control power supply circuit of claim 2, wherein the first rectifying circuit comprises a first diode and a first capacitor, and the second rectifying circuit comprises a second diode and the first capacitor, wherein one end of the first secondary winding and one end of the second secondary winding are connected to one end of the first capacitor through the first diode and the second diode, respectively, and the other end of the first secondary winding and the other end of the second secondary winding are both connected to the other end of the first capacitor.
5. The control power supply circuit of uninterruptible power supply of claim 2,
the at least one secondary winding wound on the secondary side of the first transformer further comprises a third secondary winding;
the at least one secondary winding wound on the secondary side of the second transformer further comprises a fourth secondary winding corresponding to the third secondary winding;
the rectifier circuit further comprises a third rectifier circuit for rectifying alternating current in the third secondary winding and a fourth rectifier circuit for rectifying alternating current in the fourth secondary winding, and output ends of the third rectifier circuit and the fourth rectifier circuit are connected in parallel.
6. The control power supply circuit of claim 5, wherein the number of turns of the third secondary winding is selected to enable the third rectifying circuit to output the second DC voltage, and the number of turns of the fourth secondary winding is selected to enable the fourth rectifying circuit to output the second DC voltage.
7. The control power supply circuit of claim 5, wherein the third rectifying circuit comprises a third diode and a second capacitor, and the fourth rectifying circuit comprises a fourth diode and the second capacitor, wherein one end of the third secondary winding and one end of the fourth secondary winding are connected to one end of the second capacitor through the third diode and the fourth diode, respectively, and the other end of the third secondary winding and the other end of the fourth secondary winding are both connected to the other end of the second capacitor.
8. An uninterruptible power supply, comprising:
a discharge circuit for converting direct current supplied from a direct current power supply into power frequency alternating current, the discharge circuit including a first transformer, an inverter electrically connected to a secondary side of the first transformer, and an inverter controller for controlling the inverter;
a charging circuit that charges the dc power supply with commercial power or industrial frequency ac power, the charging circuit including a second transformer, a controllable charger electrically connected to a primary side of the second transformer, and a charger controller for controlling the controllable charger; and
a control supply circuit as claimed in any one of claims 1 to 7.
9. The uninterruptible power supply of claim 8, further comprising:
a DC-DC converter having an input terminal connected to the DC power supply and an output terminal connected to the primary winding of the first transformer; and
a converter controller for controlling the DC-DC converter.
10. The uninterruptible power supply of claim 9, wherein in battery mode, the converter controller and charger controller alternately perform the following two steps:
step S11, controlling the DC-DC converter to work and the controllable charger to not work, so that the voltage on the DC bus of the uninterruptible power supply is increased from zero to a peak voltage, and the rectifying circuit provides the required working voltage;
and step S12, controlling the DC-DC converter not to work and the controllable charger to work, so that the voltage on the direct current bus is reduced from the peak voltage to zero, and the rectifying circuit provides the required working voltage.
11. The uninterruptible power supply of claim 9, wherein in an online mode, the charger controller controls the controllable charger to operate such that the rectifier circuit provides a desired operating voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610011603.0A CN106961146B (en) | 2016-01-08 | 2016-01-08 | Uninterruptible power supply and control power supply circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610011603.0A CN106961146B (en) | 2016-01-08 | 2016-01-08 | Uninterruptible power supply and control power supply circuit thereof |
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| CN106961146A CN106961146A (en) | 2017-07-18 |
| CN106961146B true CN106961146B (en) | 2021-05-14 |
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| EP1916760A2 (en) * | 2006-10-24 | 2008-04-30 | TDK Corporation | Switching power supply unit |
| CN101521392A (en) * | 2008-02-28 | 2009-09-02 | 德观电子(上海)有限公司 | Off-line uninterrupted power supply device |
| CN204013230U (en) * | 2014-07-17 | 2014-12-10 | 河北先控捷联电源设备有限公司 | Auxiliary power circuit |
| CN104716680A (en) * | 2013-12-12 | 2015-06-17 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Offline uninterruptible power supply with renewable energy and control method thereof |
| CN104734264A (en) * | 2013-12-23 | 2015-06-24 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Online interactive uninterruptible power supply and control method thereof |
| CN104953696A (en) * | 2014-03-27 | 2015-09-30 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | On-line interactive uninterrupted power source |
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| CN1274188A (en) * | 1999-05-14 | 2000-11-22 | 日本保护装置销售公司 | Uninterrupted double supplying power source unit |
| CN1126221C (en) * | 1999-05-14 | 2003-10-29 | 日本保护装置销售公司 | Uninterrupted double supplying power source unit |
| EP1916760A2 (en) * | 2006-10-24 | 2008-04-30 | TDK Corporation | Switching power supply unit |
| CN201045748Y (en) * | 2007-01-29 | 2008-04-09 | 德观电子(上海)有限公司 | Ups |
| CN101521392A (en) * | 2008-02-28 | 2009-09-02 | 德观电子(上海)有限公司 | Off-line uninterrupted power supply device |
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| CN104953696A (en) * | 2014-03-27 | 2015-09-30 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | On-line interactive uninterrupted power source |
| CN204013230U (en) * | 2014-07-17 | 2014-12-10 | 河北先控捷联电源设备有限公司 | Auxiliary power circuit |
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| CN106961146A (en) | 2017-07-18 |
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