CN219697475U - Simplified control device for magnetic suspension bearing - Google Patents
Simplified control device for magnetic suspension bearing Download PDFInfo
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- CN219697475U CN219697475U CN202320185244.6U CN202320185244U CN219697475U CN 219697475 U CN219697475 U CN 219697475U CN 202320185244 U CN202320185244 U CN 202320185244U CN 219697475 U CN219697475 U CN 219697475U
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- 239000000725 suspension Substances 0.000 title claims abstract description 31
- 230000007935 neutral effect Effects 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 46
- 238000004146 energy storage Methods 0.000 claims description 8
- 230000010354 integration Effects 0.000 abstract description 6
- 239000000306 component Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005339 levitation Methods 0.000 description 3
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model relates to a simplified control device for a magnetic suspension bearing, which comprises a power supply circuit, a positive half-bridge circuit, a negative half-bridge circuit and a neutral half-bridge branch, wherein the positive half-bridge circuit and the negative half-bridge circuit can be simultaneously and electrically connected and drive two coils in the magnetic suspension bearing at one time, specifically, current flows out of the positive half-bridge circuit, a first coil, a second coil and the negative half-bridge circuit in sequence, and as the neutral half-bridge circuit is electrically connected between the first coil and the second coil and is simultaneously connected with two power supply output ends, differential current in the first coil and the second coil can flow into or out of the neutral half-bridge circuit to form current circulation, and all coils in the magnetic suspension bearing can work after being normally electrified. Compared with the prior art, the utility model greatly reduces the number of components required in a circuit for driving the magnetic suspension bearing, so that the whole device is more compact, smaller in volume, higher in integration level and more practical.
Description
Technical Field
The utility model relates to the technical field of magnetic suspension bearing control, in particular to a simplified control device for a magnetic suspension bearing.
Background
The magnetic suspension bearing is a part for suspending the rotor in the air and ensuring that the stator and the rotor are not in mechanical contact, thereby reducing friction loss and realizing the design of a high-speed and high-efficiency motor system. The principle is that the magnetic induction lines are perpendicular to the magnetic levitation lines, the shaft cores are parallel to the magnetic levitation lines, so that the weight of the rotor is fixed on a running track, the shaft cores which are almost unloaded are propped against the direction of the magnetic levitation lines, and the whole rotor is formed to be suspended and fixed on the fixed running track.
The magnetic suspension bearing has the advantages of no mechanical abrasion, low energy consumption, long service life, low noise, no maintenance and the like. The magnetic suspension bearing controller is a core component in a magnetic suspension bearing system, and the controller adjusts electromagnetic forces loaded on the bearing in different degrees of freedom through a control coil, so that the magnetic suspension bearing is dynamically controlled to be in a dynamically stable position.
The existing magnetic suspension bearing controller system is relatively complex, wherein a driver driving part adopts a half-bridge or full-bridge topology, and the driver driving part is provided with a plurality of switching tubes and other elements, so that the number of devices is large, and the overall cost is high. The independent DCDC and the external UPS system are required to be configured on power supply, and the system has more parts and poor integration level.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a simplified control device for a magnetic bearing, so as to solve the problems of a large number of devices and poor integration level of a magnetic bearing control system in the prior art.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a simplified control device of a magnetic suspension bearing, which is electrically connected with a plurality of coils in the magnetic suspension bearing, wherein the coils comprise a first coil and a second coil, and the simplified control device comprises the following components:
the power supply circuit comprises two power supply output ends;
the positive half-bridge circuit comprises two first on-off control elements, one ends of the two first on-off control elements are electrically connected with one end of the first coil, and the other ends of the two first on-off control elements are electrically connected with two power supply output ends respectively;
the negative half-bridge circuit comprises two second on-off control elements, one ends of the two second on-off control elements are electrically connected with one end of the second coil, and the other ends of the two second on-off control elements are respectively electrically connected with two power supply output ends;
the neutral half-bridge branch comprises two third switching-off control elements, one ends of the two third switching-off control elements are electrically connected with the other end of the first coil and the other end of the second coil, and the other ends of the two third switching-off control elements are electrically connected with the two power supply output ends respectively.
Further, the two third switching-off control elements are a switching tube Q4 and a switching tube Q5, one non-control pin of the switching tube Q4 and one non-control pin of the switching tube Q5 are respectively electrically connected with the two power supply output ends, and the other non-control pin of the switching tube Q4 and the other non-control pin of the switching tube Q5 are electrically connected with the other end of the first coil and the other end of the second coil.
Further, the two first on-off control elements are a switch tube Q2 and a diode D3, one non-control pin of the switch tube Q2 is electrically connected to the one power supply output end, the other non-control pin of the switch tube Q2 is electrically connected to the negative electrode of the diode D3 and one end of the first coil, and the positive electrode of the diode D3 is electrically connected to the other power supply output end.
Further, the two second on-off control elements are a diode D4 and a switch tube Q3, a cathode of the diode D4 is electrically connected to one of the power supply output ends and one of the non-control pins of the switch tube Q2, an anode of the diode D4 is electrically connected to one of the non-control pins of the switch tube Q3 and one end of the second coil, and another non-control pin of the switch tube Q3 is electrically connected to another of the power supply output ends.
Further, the switching tube Q4 and the switching tube Q5 are both MOS tubes.
Further, the capacitor C4 is further included, the power supply circuit comprises a direct current voltage reduction circuit, the direct current voltage reduction circuit comprises a power supply input end and two power supply output ends, the power supply input end is used for being electrically connected with a power supply, and the two power supply output ends are respectively electrically connected with two ends of the capacitor C4.
Further, the direct-current voltage reduction circuit comprises a BUCK circuit.
Further, the BUCK circuit includes a capacitor C1, a switch tube Q1, a diode D2, an inductor L1 and a capacitor C2, two ends of the capacitor C1 are respectively two power supply input ends, one non-control pin of the switch tube Q1 is electrically connected with one end of the capacitor C1, another non-control pin of the switch tube Q1 is electrically connected with a negative electrode of the diode D2 and one end of the inductor L1, an anode of the diode D2 is electrically connected with the other end of the capacitor C1, the other end of the inductor L1 is electrically connected with one end of the capacitor C2, the other end of the capacitor C2 is electrically connected with an anode of the diode D2, and two ends of the capacitor C2 are respectively two power supply output ends.
Further, the power supply device further comprises an energy storage circuit, and the energy storage circuit is electrically connected with the two power supply output ends.
Further, the energy storage circuit comprises a resistor R1, a diode D1 and a capacitor C3, wherein the resistor R1 and the diode D1 are connected in parallel, one end of the resistor R1 is electrically connected with one end of the capacitor C2, the other end of the resistor R1 is electrically connected with one end of the capacitor C3, and the other end of the capacitor C3 is electrically connected with the other end of the capacitor C2.
The utility model provides a simplified control device for a magnetic suspension bearing, which comprises a power supply circuit, a positive half-bridge circuit, a negative half-bridge circuit and a neutral half-bridge branch, wherein the simplified control device for the magnetic suspension bearing can be electrically connected with the positive half-bridge circuit and the negative half-bridge circuit at the same time and can drive two coils in the magnetic suspension bearing at one time, specifically, current flows out of the positive half-bridge circuit, a first coil, a second coil and the negative half-bridge circuit in sequence, and as the neutral half-bridge circuit is electrically connected between the first coil and the second coil and is simultaneously connected with two power supply output ends, differential current in the first coil and the second coil can flow into or out of the neutral half-bridge circuit to form current circulation, and all coils in the magnetic suspension bearing can work after being electrified normally. Compared with the prior art, the utility model greatly reduces the number of components required in a circuit for driving the magnetic suspension bearing, so that the whole device is more compact, smaller in volume, higher in integration level and more practical.
Drawings
FIG. 1 is a schematic diagram of a simplified control device for a magnetic bearing according to an embodiment of the present utility model;
FIG. 2 is a circuit diagram of a power supply circuit and a tank circuit in an embodiment of the simplified control device for magnetic bearings according to the present utility model;
fig. 3 is a circuit structure diagram of a positive half-bridge circuit, a negative half-bridge circuit, and a neutral half-bridge branch in an embodiment of the simplified control device for magnetic bearing provided by the utility model.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, an embodiment of the present utility model provides a simplified magnetic bearing control device, which is electrically connected to a plurality of coils in a magnetic bearing, where the plurality of coils includes a first coil 910 and a second coil 920, and the simplified magnetic bearing control device includes:
a power supply circuit 100 including two power supply output terminals;
the positive half-bridge circuit 200 comprises two first on-off control elements, wherein one ends of the two first on-off control elements are electrically connected with one end of the first coil 910, and the other ends of the two first on-off control elements are respectively electrically connected with two power supply output ends;
the negative half-bridge circuit 300 comprises two second on-off control elements, wherein one ends of the two second on-off control elements are electrically connected with one end of the second coil 920, and the other ends of the two second on-off control elements are respectively electrically connected with two power supply output ends;
the neutral half-bridge branch 400 comprises two third switching-off control elements, wherein one ends of the two third switching-off control elements are electrically connected with the other end of the first coil 910 and the other end of the second coil 920, and the other ends of the two third switching-off control elements are respectively electrically connected with two power supply output ends.
The utility model provides a simplified magnetic bearing control device, which comprises a power supply circuit 100, a positive half-bridge circuit 200, a negative half-bridge circuit 300 and a neutral half-bridge branch 400, wherein the simplified magnetic bearing control device can be electrically connected with the positive half-bridge circuit 200 and the negative half-bridge circuit 300 at the same time and can drive two coils in a magnetic bearing at one time, specifically, current flows out of the positive half-bridge circuit 200, a first coil 910, a second coil 920 and the negative half-bridge circuit 300 in sequence, and as the neutral half-bridge circuit is electrically connected between the first coil 910 and the second coil 920 and is simultaneously connected with two power supply output ends, differential current in the first coil 910 and the second coil 920 can flow into or out of the neutral half-bridge circuit to form current circulation, and all coils in the magnetic bearing can work after being normally electrified. Compared with the prior art, the utility model greatly reduces the number of components required in a circuit for driving the magnetic suspension bearing, so that the whole device is more compact, smaller in volume, higher in integration level and more practical.
For example, in the existing driving coil technology, whether half-bridge driving or full-bridge driving is adopted, at least four components are needed for each coil (the existing driving mode is the prior art which can be known by those skilled in the art, and not described herein too much), but the magnetic suspension bearing reduction control device in the utility model can drive two coils simultaneously through two first on-off control elements, two second on-off control elements and two third on-off control elements, and total six components, and obviously, under the condition that each coil in the magnetic suspension bearing needs to be electrified, a large number of components can be saved by adopting the magnetic suspension bearing reduction control device.
Referring to fig. 2 and fig. 3, in a preferred embodiment, the magnetic suspension bearing reduction control device further includes a capacitor C4, and the power supply circuit 100 includes a dc voltage reduction circuit, where the dc voltage reduction circuit includes a power supply input end and two power supply output ends, the power supply input end is used for electrically connecting to a power supply, and the two power supply output ends are respectively electrically connected to two ends of the capacitor C4.
The ac power supply can be implemented by matching the dc voltage reduction circuit with the capacitor C4, and the dc voltage reduction circuit is known in the art, and it is understood that other conventional technologies may be actually used to implement the power supply circuit 100 in the present utility model.
In a preferred embodiment, the dc voltage reducing circuit in this embodiment includes a BUCK circuit.
Specifically, referring to fig. 2 again, the BUCK circuit in this embodiment includes a capacitor C1, a switching tube Q1, a diode D2, an inductor L1 and a capacitor C2, two ends of the capacitor C1 are respectively two power supply input ends, one non-control pin of the switching tube Q1 is electrically connected to one end of the capacitor C1, another non-control pin of the switching tube Q1 is electrically connected to a negative electrode of the diode D2 and one end of the inductor L1, an anode of the diode D2 is electrically connected to the other end of the capacitor C1, the other end of the inductor L1 is electrically connected to one end of the capacitor C2, the other end of the capacitor C2 is electrically connected to an anode of the diode D2, and two ends of the capacitor C2 are respectively two power supply output ends.
The BUCK circuit in this embodiment may be used to BUCK-convert the dc voltage of the inverter (i.e., the power supply) to a low voltage, and power the positive half-bridge circuit 200, the negative half-bridge circuit 300, and the neutral half-bridge branch 400 to drive the coils.
Further, the first on-off control element, the second on-off control element and the third on-off control element in this embodiment are elements capable of controlling on-off or current flowing in the circuit, and there are many existing devices capable of achieving this function in practice, and how these existing devices are controlled is also known in the art, and how to control these existing devices is not an important point of the present utility model, so too much description is not given herein.
Specifically, in a preferred embodiment, the first on-off control element, the second on-off control element, and the third on-off control element may all be implemented by using switching transistors. It should be noted that, the switching tube in this embodiment includes existing devices such as a MOS tube, a triode, and even a relay, and is also in the prior art, so based on the description of the pin portion of the switching tube, those skilled in the art can understand the meaning of the text and flexibly use the text according to the specific situation. In other words, the non-control pin refers to a pin directly connected to a circuit in the switching tube and directly inducing a current on-off phenomenon, and the control pin refers to a pin for connecting an external control unit and controlling the switching tube to act according to the input level. For example, in general, for a MOS transistor, hereinafter, the non-control pins of the switching transistor refer to an S pole and a D pole, and the control pin is a G pole, and is used for connecting an external control unit; for the three-stage tube, the non-control pins of the switching tube refer to a C pole and an E pole, and the control pin is a B pole and is used for being connected with an external control unit. Of course, in special cases, the non-control pin is specifically which pin in the switch tube, and can be flexibly changed according to actual needs.
Further, referring to fig. 3 again, in a preferred embodiment, the two first on-off control elements in this embodiment are a switching tube Q2 and a diode D3, one non-control pin of the switching tube Q2 is electrically connected to the one power supply output end, the other non-control pin of the switching tube Q2 is electrically connected to the cathode of the diode D3 and one end of the first coil 910, and the anode of the diode D3 is electrically connected to the other power supply output end.
In a preferred embodiment, the two second on-off control elements are a diode D4 and a switch tube Q3, the cathode of the diode D4 is electrically connected to one of the power supply output ends and one of the non-control pins of the switch tube Q2, the anode of the diode D4 is electrically connected to one of the non-control pins of the switch tube Q3 and one of the ends of the second coil 920, and the other non-control pin of the switch tube Q3 is electrically connected to the other power supply output end.
In this embodiment, the current in the magnetic bearing is approximated by two coils: one end of the first coil 910 and one end of the second coil 920 are respectively connected to the positive half-bridge circuit 200 and the negative half-bridge circuit 300, the other ends of the two coils are both connected to the neutral half-bridge branch 400, when the current from the positive half-bridge circuit 200 to the switch Guan Liuguo of the first coil 910 is I1, the current from the second coil 920 to the switch tube of the negative half-bridge circuit 300 is I2, because the currents of the first coil 910 and the second coil 920 are close, the currents thereof are basically offset, the current difference is I1-I2, the first coil 910 and the second coil 920 are both connected to the neutral half-bridge branch 400, and the difference current flows out or flows in through the common branch to complete the current circulation.
On the other hand, in the embodiment, a simplified diode is adopted to replace part of switching tubes in the traditional half-bridge driving circuit, so that the circuit is more simplified, the cost of the whole device is reduced, and the reliability is improved.
In a preferred embodiment, the two third switching-off control elements are a switching tube Q4 and a switching tube Q5, one non-control pin of the switching tube Q4 and one non-control pin of the switching tube Q5 are respectively electrically connected to the two power supply output ends, and the other non-control pin of the switching tube Q4 and the other non-control pin of the switching tube Q5 are respectively electrically connected to the other end of the first coil 910 and the other end of the second coil 920.
Further, in a preferred embodiment, the switching tube Q4 and the switching tube Q5 are both MOS tubes.
Referring to fig. 2 again, in a preferred embodiment, the magnetic bearing reduction control device further includes a tank circuit 500, and the tank circuit 500 is electrically connected to the two power supply output terminals. The energy storage circuit 500 can improve the reliability of the simplified control device of the magnetic suspension bearing, and can be realized by adopting any existing circuit with an energy storage function.
Specifically, the tank circuit 500 in this embodiment includes a resistor R1, a diode D1, and a capacitor C3, where the resistor R1 and the diode D1 are connected in parallel, one end of the resistor R1 is electrically connected to one end of the capacitor C2, the other end of the resistor R1 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is electrically connected to the other end of the capacitor C2.
When the external power supply is abnormal, the tank circuit 500 supplies power to the low-voltage bus through the diode D1 when the BUCK circuit cannot maintain the low-voltage side power supply.
The simplified control device for the magnetic suspension bearing provided by the utility model has the following advantages:
1. a half-bridge circuit composed of a simplified diode and a switching tube is selected. The adoption of the diode by one switching tube in the half bridge can reduce the system cost on one hand, and on the other hand, the diode does not have the risk of direct connection of the upper tube and the lower tube, so that the reliability of the circuit system is improved.
2. The utility model provides a common midpoint connecting method, which reduces the number of system branches, reduces the number of devices, reduces the cost and improves the reliability.
3. The utility model selects an integrated DCDC step-down control, can step down a DC bus of a frequency converter to a lower voltage for supplying power to a bridge arm of a magnetic suspension driver, and simultaneously comprises a standby energy storage power supply, and provides a standby power supply when external power supply is powered down.
The utility model provides a simplified magnetic bearing control device, which comprises a power supply circuit 100, a positive half-bridge circuit 200, a negative half-bridge circuit 300 and a neutral half-bridge branch 400, wherein the simplified magnetic bearing control device can be electrically connected with the positive half-bridge circuit 200 and the negative half-bridge circuit 300 at the same time and can drive two coils in a magnetic bearing at one time, specifically, current flows out of the positive half-bridge circuit 200, a first coil 910, a second coil 920 and the negative half-bridge circuit 300 in sequence, and as the neutral half-bridge circuit is electrically connected between the first coil 910 and the second coil 920 and is simultaneously connected with two power supply output ends, differential current in the first coil 910 and the second coil 920 can flow into or out of the neutral half-bridge circuit to form current circulation, and all coils in the magnetic bearing can work after being normally electrified. Compared with the prior art, the utility model greatly reduces the number of components required in a circuit for driving the magnetic suspension bearing, so that the whole device is more compact, smaller in volume, higher in integration level and more practical.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. A simplified control device for a magnetic bearing, electrically connected to a plurality of coils in the magnetic bearing, wherein a plurality of the coils include a first coil and a second coil, comprising:
the power supply circuit comprises two power supply output ends;
the positive half-bridge circuit comprises two first on-off control elements, one ends of the two first on-off control elements are electrically connected with one end of the first coil, and the other ends of the two first on-off control elements are electrically connected with two power supply output ends respectively;
the negative half-bridge circuit comprises two second on-off control elements, one ends of the two second on-off control elements are electrically connected with one end of the second coil, and the other ends of the two second on-off control elements are respectively electrically connected with two power supply output ends;
the neutral half-bridge branch comprises two third switching-off control elements, one ends of the two third switching-off control elements are electrically connected with the other end of the first coil and the other end of the second coil, and the other ends of the two third switching-off control elements are electrically connected with the two power supply output ends respectively.
2. The simplified magnetic bearing control device according to claim 1, wherein the two third switching-off control elements are a switching tube Q4 and a switching tube Q5, one non-control pin of the switching tube Q4 and one non-control pin of the switching tube Q5 are respectively electrically connected to the two power supply output ends, and the other non-control pin of the switching tube Q4 and the other non-control pin of the switching tube Q5 are respectively electrically connected to the other end of the first coil and the other end of the second coil.
3. The simplified magnetic bearing control device according to claim 1, wherein the two first on-off control elements are a switching tube Q2 and a diode D3, one non-control pin of the switching tube Q2 is electrically connected to the one power supply output end, the other non-control pin of the switching tube Q2 is electrically connected to the cathode of the diode D3 and one end of the first coil, and the anode of the diode D3 is electrically connected to the other power supply output end.
4. The simplified magnetic bearing control device according to claim 3, wherein the two second on-off control elements are a diode D4 and a switching tube Q3, a cathode of the diode D4 is electrically connected to one of the power supply output ends and one of the non-control pins of the switching tube Q2, an anode of the diode D4 is electrically connected to one of the non-control pins of the switching tube Q3 and one end of the second coil, and another non-control pin of the switching tube Q3 is electrically connected to another of the power supply output ends.
5. The simplified control device for magnetic bearings according to claim 2, wherein the switching tube Q4 and the switching tube Q5 are both MOS tubes.
6. The simplified control device of a magnetic suspension bearing according to claim 1, further comprising a capacitor C4, wherein the power supply circuit comprises a dc voltage reduction circuit, the dc voltage reduction circuit comprises a power supply input end and two power supply output ends, the power supply input end is used for being electrically connected with a power supply source, and the two power supply output ends are respectively electrically connected with two ends of the capacitor C4.
7. The simplified control apparatus of a magnetic bearing as recited in claim 6, wherein the dc step-down circuit includes a BUCK circuit.
8. The simplified magnetic bearing control device according to claim 7, wherein the BUCK circuit includes a capacitor C1, a switching tube Q1, a diode D2, an inductor L1 and a capacitor C2, two ends of the capacitor C1 are respectively the two power supply input ends, one non-control pin of the switching tube Q1 is electrically connected to one end of the capacitor C1, another non-control pin of the switching tube Q1 is electrically connected to the negative electrode of the diode D2 and one end of the inductor L1, the positive electrode of the diode D2 is electrically connected to the other end of the capacitor C1, the other end of the inductor L1 is electrically connected to one end of the capacitor C2, the other end of the capacitor C2 is electrically connected to the positive electrode of the diode D2, and two ends of the capacitor C2 are respectively the two power supply output ends.
9. The simplified control device of a magnetic bearing as recited in claim 8, further comprising an energy storage circuit electrically connected to both of said power supply outputs.
10. The simplified control device of claim 9, wherein the energy storage circuit includes a resistor R1, a diode D1 and a capacitor C3, the resistor R1 and the diode D1 are connected in parallel, one end of the resistor R1 is electrically connected to one end of the capacitor C2, the other end of the resistor R1 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is electrically connected to the other end of the capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320185244.6U CN219697475U (en) | 2023-02-01 | 2023-02-01 | Simplified control device for magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320185244.6U CN219697475U (en) | 2023-02-01 | 2023-02-01 | Simplified control device for magnetic suspension bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219697475U true CN219697475U (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320185244.6U Active CN219697475U (en) | 2023-02-01 | 2023-02-01 | Simplified control device for magnetic suspension bearing |
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| Country | Link |
|---|---|
| CN (1) | CN219697475U (en) |
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2023
- 2023-02-01 CN CN202320185244.6U patent/CN219697475U/en active Active
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