CN209913569U - Multiple redundant power supply unit of magnetic suspension bearing - Google Patents
Multiple redundant power supply unit of magnetic suspension bearing Download PDFInfo
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- CN209913569U CN209913569U CN201920878934.3U CN201920878934U CN209913569U CN 209913569 U CN209913569 U CN 209913569U CN 201920878934 U CN201920878934 U CN 201920878934U CN 209913569 U CN209913569 U CN 209913569U
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Abstract
The utility model provides a magnetic suspension bearing multiple redundant power supply device, which comprises a frequency converter, a UPS power supply and a power supply uninterrupted switching device; the uninterrupted power switching device comprises: the single-phase bridge rectifier module B1, the three-phase bridge rectifier module B2, the single-phase bridge rectifier module B3 and the single-phase bridge rectifier module B4. The utility model relates to a magnetic suspension bearing multiple redundant power supply device, which can realize multiple redundant power supply to an electromagnetic bearing; meanwhile, the power supply to the electromagnetic bearing is continuously ensured by utilizing the electric energy feedback to the frequency converter in the deceleration process of the rotor of the magnetic suspension motor, and the rotor damage caused by the falling of the rotor of the magnetic suspension motor in the stalling or low speed is reduced; and the uninterrupted power supply switching device can effectively avoid the mutual interference of multiple power supplies and reduce the damage of power supply equipment.
Description
Technical Field
The utility model belongs to the magnetic suspension motor field especially relates to a multiple redundant power supply unit of magnetic suspension bearing.
Background
The magnetic suspension bearing is a novel high-performance bearing, and compared with the traditional bearing, the magnetic suspension bearing has no mechanical contact, so that the motor rotor can reach very high running speed, and the most critical part in the magnetic suspension bearing system is a magnetic bearing controller. In order to prevent the motor rotor from falling and being damaged when the motor rotor runs at a high speed, the magnetic bearing controller needs to be continuously supplied with power. However, under the condition of the prior art, because the magnetic suspension motor is complex in use condition and power failure often occurs, the existing magnetic suspension bearing power supply technology cannot meet the requirement of continuous uninterrupted power supply for the magnetic suspension bearing, cannot provide effective and timely protection for the falling of the motor rotor, and easily generates mutual interference of multiple power supplies, and damages to equipment occur.
Disclosure of Invention
In view of this, the present invention provides a magnetic suspension bearing multiple redundant power supply device, which is used in cooperation with a frequency converter and an uninterruptible power supply switching device; multiple redundant power supply to the electromagnetic bearing can be realized; meanwhile, the power supply to the electromagnetic bearing is continuously ensured by utilizing the electric energy feedback to the frequency converter in the deceleration process of the rotor of the magnetic suspension motor, and the rotor damage caused by the falling of the rotor of the magnetic suspension motor in the stalling or low speed is reduced; and the uninterrupted power supply switching device can effectively avoid the mutual interference of multiple power supplies and avoid the damage of power supply equipment.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a magnetic suspension bearing multiple redundant power supply device comprises a frequency converter and a power supply uninterrupted switching device; the uninterrupted power switching device comprises: the single-phase bridge rectifier module B1, the three-phase bridge rectifier module B2 and the single-phase bridge rectifier module B3; the DC output end of the single-phase bridge rectifier module B1, the DC output end of the three-phase bridge rectifier module B2 and the DC output end of the single-phase bridge rectifier module B3 are connected in parallel with the same pole to be used as the DC output end of the power supply uninterrupted switching device, the DC output end of the power supply uninterrupted switching device is connected with the power supply input end of the magnetic bearing, the power supply output end of the magnetic bearing is connected with the power supply end of the magnetic bearing controller, and the output end of the magnetic bearing controller is connected with the control end of the;
the external 380V three-phase alternating current is respectively connected with the alternating current input end of the three-phase bridge rectifier module B2 and the input end of the frequency converter, and the output end of the frequency converter is connected with the control end of the motor stator; the direct current buses in the frequency converter are respectively and correspondingly connected with the alternating current input end of the single-phase bridge rectifier module B1; the external 220V single-phase alternating current is connected with the alternating current input end of the single-phase bridge rectifier module B3.
Further, the uninterrupted power switching device comprises: a single-phase bridge rectifier module B4; the direct-current output end of the single-phase bridge rectification module B4 and the direct-current output end of the single-phase bridge rectification module B1 are connected in parallel in the same pole; the external 220V single-phase alternating current is connected with the input end of the UPS, and the alternating current output end of the UPS is connected with the alternating current input end of the single-phase bridge rectifier module B4.
Further, include in the converter: an inverter and a three-phase rectifier; the external 380V three-phase alternating current is connected with the alternating current input end of the three-phase rectifier, the direct current input end of the three-phase rectifier is connected with the input end of the inverter through the direct current bus, and the output end of the inverter is connected with the control end of the motor stator.
Compared with the prior art, the utility model relates to a multiple redundant power supply unit of magnetic suspension bearing has following advantage:
the utility model relates to a magnetic suspension bearing multiple redundant power supply device, which is matched with a frequency converter and a power supply uninterrupted switching device; multiple redundant power supply to the electromagnetic bearing can be realized; meanwhile, the power supply to the electromagnetic bearing is continuously ensured by utilizing the electric energy feedback to the frequency converter in the deceleration process of the rotor of the magnetic suspension motor, and the rotor damage caused by the falling of the rotor of the magnetic suspension motor in the stalling or low speed is reduced; and the uninterrupted power supply switching device can effectively avoid the mutual interference of multiple power supplies and avoid the damage of power supply equipment.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
In the drawings:
fig. 1 is a schematic diagram of a magnetic suspension bearing multiple redundant power supply device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a magnetic suspension bearing multiple redundant power supply device according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-2, a magnetic suspension bearing multiple redundant power supply device includes a frequency converter and an uninterruptible power supply switching device; the uninterrupted power switching device comprises: the single-phase bridge rectifier module B1, the three-phase bridge rectifier module B2 and the single-phase bridge rectifier module B3; the DC output end of the single-phase bridge rectifier module B1, the DC output end of the three-phase bridge rectifier module B2 and the DC output end of the single-phase bridge rectifier module B3 are connected in parallel with the same pole to be used as the DC output end of the power supply uninterrupted switching device, the DC output end of the power supply uninterrupted switching device is connected with the power supply input end of the magnetic bearing, the power supply output end of the magnetic bearing is connected with the power supply end of the magnetic bearing controller, and the output end of the magnetic bearing controller is connected with the control end of the;
the external 380V three-phase alternating current is respectively connected with the alternating current input end of the three-phase bridge rectifier module B2 and the input end of the frequency converter, and the output end of the frequency converter is connected with the control end of the motor stator; the direct current buses in the frequency converter are respectively and correspondingly connected with the alternating current input end of the single-phase bridge rectifier module B1; the external 220V single-phase alternating current is connected with the alternating current input end of the single-phase bridge rectifier module B3.
As shown in fig. 1-2, the uninterruptible power switching device includes: a single-phase bridge rectifier module B4; the direct-current output end of the single-phase bridge rectification module B4 and the direct-current output end of the single-phase bridge rectification module B1 are connected in parallel in the same pole; the external 220V single-phase alternating current is connected with the input end of the UPS, and the alternating current output end of the UPS is connected with the alternating current input end of the single-phase bridge rectifier module B4.
In this embodiment: the multiple redundant power supplies include four power supplies: including outside interchange 380V, outside interchange 220V, DC 530V of direct current generating line in UPS alternating current 220V and the converter, the AC input of four bridge rectifier modules in this four ways power supply difference connection power incessant switching device, the DC output of four bridge rectifier modules is parallelly connected together and is supplied power for the magnetic bearing power, based on the parallel design of DC output of these four bridge rectifier modules, concrete uninterrupted switching operating condition of power as follows:
when the four paths of power supply work normally, the uninterrupted power supply switching device outputs the DC 530V of the highest DC bus to supply power to the magnetic bearing power supply;
when the external 220V single-phase alternating current is powered off, the uninterrupted power supply switching device outputs 530V direct current of the highest direct current bus to supply power to the magnetic bearing power supply;
when the external 380V three-phase alternating current is powered off, the external 220V alternating current supplies power to the magnetic bearing power supply through the power supply uninterrupted switching device;
when the external 220V single-phase alternating current and the external 380V three-phase alternating current are both cut off, the UPS starts to work, and the 220V output alternating current supplies power to the magnetic bearing power supply through the power supply uninterrupted switching device;
when the external 220V single-phase alternating current, the external 380V three-phase alternating current and the UPS are all powered off, the magnetic suspension motor rotor rotates at a reduced speed, the frequency converter starts a self-contained power generation mode, the received electric energy is continuously input into the power supply uninterrupted switching device through the direct-current bus in the frequency converter, and is output to the magnetic bearing power supply through the single-phase bridge rectifier module B1 to continuously supply power to the electromagnetic bearing, so that the rotor damage caused by the direct falling of the magnetic suspension motor rotor can be effectively reduced.
In the prior art, mutual power supply interference is very easy to occur in multiple redundant power supplies, and in the embodiment, a direct-current bus in the frequency converter is connected with an alternating-current input end of a single-phase bridge rectifier module B1; when the frequency converter is not started to work, the currents output by the three-phase bridge rectifier module B2, the single-phase bridge rectifier module B3 and the single-phase bridge rectifier module B4 cannot flow back into the direct current bus of the frequency converter due to the reverse cut-off characteristic of the diode in the single-phase bridge rectifier module B1, so that the frequency converter can be effectively prevented from being damaged, and the interference caused by multiple power supplies can be avoided.
As shown in fig. 2, the frequency converter includes: an inverter and a three-phase rectifier; the external 380V three-phase alternating current is connected with the alternating current input end of the three-phase rectifier, the direct current input end of the three-phase rectifier is connected with the input end of the inverter through the direct current bus, and the output end of the inverter is connected with the control end of the motor stator.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a multiple redundant power supply unit of magnetic bearing which characterized in that: comprises a frequency converter and a power supply uninterrupted switching device; the uninterrupted power switching device comprises: the single-phase bridge rectifier module B1, the three-phase bridge rectifier module B2 and the single-phase bridge rectifier module B3; the direct current output end of the single-phase bridge rectifier module B1, the direct current output end of the three-phase bridge rectifier module B2 and the direct current output end of the single-phase bridge rectifier module B3 are connected in parallel with the same pole to serve as the direct current output end of the power supply uninterrupted switching device, and the direct current output end of the power supply uninterrupted switching device is connected with the power supply input end of the magnetic bearing;
the external 380V three-phase alternating current is respectively connected with the alternating current input end of the three-phase bridge rectifier module B2 and the input end of the frequency converter, and the output end of the frequency converter is connected with the control end of the motor stator; the direct-current buses in the frequency converter are respectively and correspondingly connected with the alternating-current input end of the single-phase bridge rectifier module B1; the external 220V single-phase alternating current is connected with the alternating current input end of the single-phase bridge rectifier module B3.
2. The magnetic bearing multiple redundant power supply device of claim 1, wherein: the uninterrupted power switching device comprises: a single-phase bridge rectifier module B4; the direct current output end of the single-phase bridge rectification module B4 and the direct current output end of the single-phase bridge rectification module B1 are connected in parallel in the same pole; the external 220V single-phase alternating current is connected with the input end of a UPS power supply, and the alternating current output end of the UPS power supply is connected with the alternating current input end of the single-phase bridge rectifier module B4.
3. The magnetic bearing multiple redundant power supply device of claim 1, wherein: the frequency converter comprises: an inverter and a three-phase rectifier; the external 380V three-phase alternating current is connected with the alternating current input end of the three-phase rectifier, the direct current input end of the three-phase rectifier is connected with the input end of the inverter through a direct current bus, and the output end of the inverter is connected with the control end of the motor stator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920878934.3U CN209913569U (en) | 2019-06-12 | 2019-06-12 | Multiple redundant power supply unit of magnetic suspension bearing |
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| CN201920878934.3U CN209913569U (en) | 2019-06-12 | 2019-06-12 | Multiple redundant power supply unit of magnetic suspension bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224481A (en) * | 2019-06-12 | 2019-09-10 | 天津飞旋科技有限公司 | A kind of magnetic suspension bearing multiple redundancy power supply unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224481A (en) * | 2019-06-12 | 2019-09-10 | 天津飞旋科技有限公司 | A kind of magnetic suspension bearing multiple redundancy power supply unit |
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Address after: 300457 Block D, No. 90, 12th Avenue, Binhai New Area Development Zone, Tianjin Patentee after: Tianjin Feixuan Technology Co.,Ltd. Address before: 300457 Block D, No. 90, 12th Avenue, Binhai New Area Development Zone, Tianjin Patentee before: TIANJIN EMAGING TECHNOLOGY Co.,Ltd. |