CN202679265U - Intelligent switching power supply of active magnetic-suspension bearing system - Google Patents
Intelligent switching power supply of active magnetic-suspension bearing system Download PDFInfo
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- CN202679265U CN202679265U CN 201120429694 CN201120429694U CN202679265U CN 202679265 U CN202679265 U CN 202679265U CN 201120429694 CN201120429694 CN 201120429694 CN 201120429694 U CN201120429694 U CN 201120429694U CN 202679265 U CN202679265 U CN 202679265U
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Abstract
The utility model relates to an intelligent switching power supply of an active magnetic-suspension bearing system. The switching power supply comprises an input rectifier filter, a full-bridge high-frequency switch converter, a high-frequency transformer, an output rectifier filter and a control circuit, wherein a 220V commercial power supply is connected with an input end of the input rectifier filter, an output end of the input rectifier filter is connected with an input end of the output rectifier filter through the full-bridge high-frequency switch converter and the high-frequency transformer, and an output end of the output rectifier filter is connected to a load; and an input end of the control circuit is connected with the output end of the output rectifier filter, and an output end of the control circuit is connected with the full-bridge high-frequency switch converter. The intelligent switching power supply can ensure that the required proper voltage is supplied to the power amplifier timely when the rotor of the magnetic-suspension bearing support is in high speed rotation, and the output voltage of the power supply can be adjusted automatically when the rotating speed of the rotor changes, so as to adapt to the requirements of rotating speed variations of the rotor; further, the intelligent switching power supply has the advantages of small volume, light weight, high efficiency, low heat productivity, stable performance, and the like.
Description
Technical field
The utility model is a kind of Active Magnetic Suspending Bearing system intelligence Switching Power Supply.
Background technology
Along with the development of magnetic bearing application technology, magnetic bearing system is also more and more higher to the requirement of its power supply.The system power supply and the power amplifier that adopt in magnetic bearing system both at home and abroad at present mainly contain following combination: linear power supply+Linear Power Amplifier; Linear power supply+close power amplifier; Switching Power Supply+close power amplifier.In these combinations, the control precision of linear power supply+Linear Power Amplifier is the highest, and its shortcoming is that the heating of power discharging device utilance serious and power supply is extremely low, only is suitable for low power magnetic levitation bearing system and uses.The feature of this class combination is: when the rotor of electromagnetic bearing supporting during in static state, the impedance of load very little (this moment, the induction reactance of inductance was inoperative), therefore, the voltage of the linear power supply of power amplifier will all be born by power discharging device, causes heating seriously; The voltage that reduce power supply this moment can make moderate progress, but fixing supply voltage can not adapt to again the needs (induction reactance of inductance will be considered this moment) after rotor speed raises.And linear power supply+close power amplifier, and Switching Power Supply+close power amplifier all exists between the discontinuity area of signal, although the existence of switch block can suitably reduce heating and improve the utilance of power supply, facts have proved that such design effect is also not obvious.For electromagnetic bearing, desirable power supply should be such: when the rotor of supporting is in static or during the slow-speed of revolution, the output voltage of power supply should keep a lower numerical value; And along with the rising of rotor speed, the output voltage of power supply also should progressively raise, and its amplitude should be to satisfy the optimum value of corresponding rotating speed.In this time, power amplifier will need not to use close power amplifier again, and traditional Linear Power Amplifier just can meet the demands, and its heating situation and energy utilization rate all can obtain the result of a satisfaction.The power supply of the utility model can be realized one of power supply of this target just.
At present, active magnetic bearings (Active Megnetic Bearing, be called for short AMB) to Intelligent magnetic bearing (Intelligent Megnetic Bearing, abbreviation IMB) future development, the Intelligent magnetic bearing is a kind of support unit that can adapt to following mechanical General Requirements, and it is a kind of novel magnetic bearing that consists of after at present common magnetic bearing " acquisition " designer's the wisdom.Its advantage is that the professional knowledges such as Real-time modeling set, analytical calculation, self-correcting control technology and system rotor dynamic analysis computational methods " are melted into " self, most Specialty Design work transferred to by the means of " online design " finish, the whole design works of product that the professional designer will carry out, just consider from the angle of using, get final product the periphery design of IMB.Along with magnetic bearing by the development of AMB to IMB, used power supply also is necessary to do corresponding improvement according to actual conditions, to adapt to the needs of intelligent magnetic bearing.Linear power supply is through the Industrial Frequency Transformer transformation, again through the over commutation output dc voltage with civil power; Directly rectifier power source is identical with the linear power supply operation principle, has just increased voltage regulator between civil power and Industrial Frequency Transformer.The advantage of these two kinds of power supplys is the stabilitys that can reach very high, ripple is also very little, and the interference and the noise that do not have Switching Power Supply to have, but its shortcoming is to need huge and heavy Industrial Frequency Transformer, the volume and weight of required filter capacitor is also quite large, and efficient is low, caloric value is also large.In view of Switching Power Supply and linear power supply and directly rectifier power source compare and have that volume is little, lightweight, efficient is high, caloric value is low and steady performance, so the power supply of the utility model also is the first-selection of Intelligent magnetic bearing arrangement design.
The utility model content
The purpose of this utility model is the defective that exists for prior art to provide a kind of Active Magnetic Suspending Bearing system intelligence Switching Power Supply, solves that this bearing energy utilization rate is low, power amplifying device heat problems of too.Design of the present utility model is: at first be that the input reference source is different from Switching Power Supply commonly used, the a reference source of Switching Power Supply commonly used need adopt the higher extraneous a reference source of precision, and requirement has higher temperature stability and lower noise grade, in case input reference determines that then system's output PWM duty ratio also is determined.And the input reference signal of native system is the voltage signal corresponding with the tach signal of magnetic bearing rotor, and this signal also constantly changes when rotor speed changes.
Next is owing to the utility model is to design for magnetic bearing system, its control circuit software systems need adopt specific intelligent control algorithm, according to the continuous regulation output PWM of the tach signal of magnetic bearing rotor duty ratio, reach the purpose that makes output voltage satisfy the magnetic bearing system requirement.And integrated PWM Controller commonly used can't import algorithm, the change of duty ratio is with the input signal continually varying, if satisfy the particular requirement of the utility model system, carry out loaded down with trivial details Digital Signal Processing after then need doing analog-to-digital conversion to the rotor signal, the real-time of processing in order to satisfy signal is had higher requirement to the hardware of system.In view of above analysis, adopt integrated PWM Controller commonly used can't satisfy the utility model control circuit and require the function that realizes, therefore the design of control circuit needs take microcontroller as core, imports intelligent control algorithm, realizes aforementioned all functions under the cooperation of other peripheral circuits.The selection of microcontroller has direct impact for the index of power-supply system, and microcontroller commonly used mainly contains single-chip microcomputer SCM (Single Chip Micyoco) and digital signal processor DSP (Digital Signal Processing).Both compare, and DSP is higher than the dominant frequency of SCM, and the single instrction execution cycle is also wanted much shorter.The TMS320F2812 dominant frequency is 150MHz, and the single instrction execution cycle is 6.67ns; 8051 single-chip microcomputer dominant frequency are 12MHz only, and single command cycle is up to 1000ns.Because the utility model main circuit adopts full-bridge high-frequency converter topology structure, if adopt 8051 cores as control circuit, then need to finish with multi-disc 8051 design of control circuit, adopt the DSP of TMS320F2812 then only to need a slice.In addition, TMS320F2812 has adopted enhanced Harvard architecture, and program and data have independently memory space, independently program bus and data/address bus are arranged separately, sheet contains Flash, has greatly improved data-handling capacity, is applicable to real-time Digital Signal Processing.It has good compatibility simultaneously, can realize and the source code compatibility of TMS320F24x/LF240x processor, better realizes the hardware transplanting.And TMS320F2812 is a complex structure, and the processor that instruction is numerous and jumbled can be processed many instructions simultaneously.Therefore, the utility model employing TMS320F2812 chip is the design that core is carried out control circuit.
According to above-mentioned design, the utility model adopts following technical proposals:
A kind of Active Magnetic Suspending Bearing system intelligence Switching Power Supply comprises input rectifying filter, full-bridge high-frequency switch converters, high frequency transformer, output rectification filter device and control circuit.The 220V city is electrically connected described input rectifying filter input end, and the output of input rectifying filter is connected the input that connects the output rectification filter device through the full-bridge high-frequency switch converters with high frequency transformer, and the output of output rectification filter device is connected to load; The input of described control circuit connects the output of output rectification filter device, and output connects the full-bridge high-frequency switch converters.
The circuit of described input rectifying filter is with the first filtering capacitor with the second filtering capacitor is in parallel consists of by 1 rectifier bridge KBPC3510.
The circuit of described full-bridge high-frequency switch converters is by first power transistor, second largest power transistor, the third-largest power transistor, the fourth-largest power transistor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, and the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity form; Described 4 high power transistors are divided into two arms that first power transistor and second largest power transistor, the third-largest power transistor and two pairs of the fourth-largest power transistors consist of respectively full-bridge, described 4 resistance and 4 electric capacity are divided into four pairs: the first resistance and the 3rd electric capacity, the second resistance and the 4th electric capacity, the 3rd resistance and the 5th electric capacity, the 4th resistance and the 6th electric capacity are connected respectively and are distinguished described 4 high power transistors in parallel again, form four energy absorption loops.
Described high frequency transformer is to form take the EE55/21 magnetic core as the core coiling.
Described output rectification filter device is to consist of bridge rectifier by the first fast recovery diode, the second fast recovery diode, the 3rd fast recovery diode and the 4th fast recovery diode, and the 7th filter capacitor in parallel, the 8th filter capacitor behind its output series connection first filter inductance; Described 4 fast recovery diodes are all selected 30120RHRG, and it is withstand voltage to be 1200V, and rated current is 30A; The first filter inductance is selected EE55/55/21; The 7th filter capacitor, the 8th filter capacitor are selected the electrochemical capacitor parallel join of 2 220uF/200V, and the total capacity that obtains is 440uF.
Described control circuit is to be made of drive circuit, the second isolation processing device, DSP, light-coupled isolation processor, random asccess memory, the first isolation processing device and electric current and voltage detector.The input of described electric current and voltage detector connects the output of described output rectification filter device, and its output is connected to DSP behind the first isolation processing device, described DSP connects random asccess memory, described light-coupled isolation processor input rotor speed signal, and output access DSP; The output of DSP is connected to described full-bridge high-frequency switch converters behind the second isolation processing device and drive circuit.
Described drive circuit is selected the TLP250 chip, and the output of chip drives high power transistor through the 6th resistance and the 7th electric resistance partial pressure; Described DSP selects TMS320F2812 chip also external 1 active crystal oscillator of 30M, the data storage chip CY7C1021 chip of 1 16 64K that extend out, reset circuit, data acquisition circuit, pwm control signal generation output circuit; Described electric current and voltage detector is by 1 amplifier LM358, the 17 resistance and the 18 resistance and 1 voltage stabilizing didoe D
5Consist of, its connected mode is the positive input that the 17 resistance and the 18 resistance series connection dividing potential drop are connected to amplifier LM358, and the negative input of amplifier LM358 links to each other with its output, and the output of amplifier LM358 connects a voltage stabilizing didoe D simultaneously
5Described the 7th isolation processing device, the 11 isolation processing device select 4721; The light-coupled isolation processor is selected TLP521; Random asccess memory is selected A416316B.
The utility model compared with prior art, have following apparent outstanding substantive distinguishing features and remarkable advantage: the utility model is take dsp chip TMS320F2812 as core, the state informations such as the tach signal of collection magnetic bearing rotor and major loop feedback voltage, send into DSP and carry out analyzing and processing, obtain corresponding control signal, so that can following rotation speed change, supply power voltage makes adjustment in real time, when rotating speed is low, voltage is lower, power consumption is less, when the rotor high-speed rotation, voltage is automatically regulated and is become large, makes rotor stability in poised state, and system is more reliable, longer service life, and have with linear power supply and directly rectifier power source compare that to have a volume little, lightweight, efficient is high, low and the steady performance of caloric value.Can be widely used in high-grade, precision and advanced industrial circle.
Description of drawings
Fig. 1 Active Magnetic Suspending Bearing system intelligence Switching Power Supply structure chart.
Fig. 2 full-bridge high-frequency inverter main circuit.
Fig. 3 drive circuit, wherein a figure is that 1 pipe drives, and b figure is that 2 pipes drive, and c figure is that 3 pipes drive, and d figure is that 4 pipes drive.
Fig. 4 electric current and voltage detector circuit.
Embodiment
Preferred embodiment accompanying drawings of the present utility model is as follows:
Embodiment one:
Referring to Fig. 1, this Active Magnetic Suspending Bearing system intelligence Switching Power Supply comprises input rectifying filter 1, full-bridge high-frequency switch converters 2, high frequency transformer 3, output rectification filter device 4 and control circuit 5.The 220V city is electrically connected described input rectifying filter 1 input, the output of input rectifying filter 1 is through full-bridge high-frequency switch converters 2 and the input that connects output rectification filter device 4 after high frequency transformer is connected, and the output of output rectification filter device 4 is connected to load; The input of described control circuit 5 connects the output of output rectification filter device 4, and output connects full-bridge high-frequency switch converters 2.
Embodiment two:
Present embodiment and embodiment one are basic identical, and special feature is as follows:
Referring to Fig. 2, the circuit of above-mentioned input rectifying filter 1 is by 1 rectifier bridge KBPC3510 and the first filtering capacitor C
1With the second filtering capacitor C
2Formation in parallel.Rectifier bridge KBPC3510, it is withstand voltage to be 1000V, anti-stream is 35A; Filter capacitor is selected the electrochemical capacitor C of 2 470uF/450V
1, C
2Parallel join, the total capacity that obtains is 940uF.The input rectifying filter its role is to the alternating current of electrical network input is carried out rectifying and wave-filtering, for converter provides ripple less direct voltage.And when the electrical network instantaneous power-off, the energy that filter capacitor stores still can make Switching Power Supply output keep the regular hour.
The circuit of above-mentioned full-bridge high-frequency switch converters 2 is by first power transistor VT
1, second largest power transistor VT
2, the third-largest power transistor VT
3, the fourth-largest power transistor VT
4, the first resistance R
1, the second resistance R
2, the 3rd resistance R
3, the 4th resistance R
4, the 3rd capacitor C
3, the 4th capacitor C
4, the 5th capacitor C
5, the 6th capacitor C
6Form; Described 4 high power transistor VT
1~ VT
4Be divided into the first and second high power transistor VT
1And VT
2, the third and fourth high power transistor VT
3And VT
4Two pairs of two arms that consist of respectively full-bridge, described 4 resistance R
1~ R
4With 4 capacitor C
3~ C
6Be divided into four pairs: the first resistance and the 3rd electric capacity R
1And C
3, the second resistance and the 4th electric capacity R
2And C
4, the 3rd resistance and the 5th electric capacity R
3And C
5, the 4th resistance and the 6th electric capacity R
4And C
6Described 4 high power transistor VT in parallel are distinguished in series connection more respectively
1~ VT
4, form four energy absorption loops.First power transistor VT
1With the fourth-largest power transistor VT
4During conducting, electric current is through first power transistor VT
1Enter the former limit of converter, again through the fourth-largest power transistor VT
4Form the loop, the supply voltage forward is added in the load; As second largest power transistor VT
2With the third-largest power transistor VT
3During conducting, electric current is through second largest power transistor VT
2Enter the former limit of converter, again through the third-largest power transistor VT
3Form the loop, the supply voltage forward is added in the load, and this process has been finished the conversion from DC to AC; The energy absorption loop is also as a kind of buffer, and when power tube moment disconnection, buffer element R, C will be by providing communication channel, the collector voltage stress when reducing the power tube disconnection.
Above-mentioned high frequency transformer 3 is to form take the EE55/21 magnetic core as the core coiling, and its effect is with again output after the output voltage isolation of full-bridge high-frequency switch converters and the step-down.
Above-mentioned output rectification filter device 4 is by the first fast recovery diode D
1, the second fast recovery diode D
2, the 3rd fast recovery diode D
3With the 4th fast recovery diode D
4Consist of bridge rectifier, and its output series connection the first filter inductance L
1Rear the 7th filter capacitor C in parallel
7, the 8th filter capacitor C
8Described 4 fast recovery diode D
1~ D
4All select 30120RHRG, it is withstand voltage to be 1200V, and rated current is 30A; The first filter inductance L
1Select EE55/55/21; The 7th filter capacitor C
7, the 8th filter capacitor C
8Select the electrochemical capacitor parallel join of 2 220uF/200V, the total capacity that obtains is 440uF.Above-mentioned output rectification filter device 4 its role is to high-frequency ac voltage filtering with converter output and obtains the direct voltage that needs.Prevent also that simultaneously high frequency noise is to the interference of load.Circuit theory is identical with input filter.
Above-mentioned control circuit 5 its role is to detect output dc voltage, compares with reference voltage, isolates amplification, the pulse duration of modulating oscillator output, thus the control change device is to keep the stable of output voltage.Control circuit is take dsp chip TMS320F2812 as core, the state informations such as the tach signal of collection magnetic bearing rotor and major loop feedback voltage, send into DSP and carry out analyzing and processing, obtain corresponding control signal, the switch of control main circuit high power transistor, thus the intellectuality that realizes Switching Power Supply is controlled.The realization of control circuit and intelligent algorithm all realizes as the basis take TMS320F2812.Control circuit 5 is to be made of drive circuit 12, the second isolation processing device 11, DSP8, light-coupled isolation processor 9, random asccess memory 10, the first isolation processing device 7 and electric current and voltage detector 6.The input of described electric current and voltage detector 6 connects the output of described output rectification filter device 4, and its output is connected to DSP8 behind the first isolation processing device 7, described DSP8 connects random asccess memory 10, described light-coupled isolation processor 9 input rotor speed signals, and output access DSP8; The output of DSP8 is connected to described full-bridge high-frequency switch converters 2 behind the second isolation processing device 11 and drive circuit 12.Described DSP8 selects TMS320F2812 chip also external 1 active crystal oscillator of 30M, the data storage chip CY7C1021 chip of 1 16 64K that extend out, reset circuit, data acquisition circuit, pwm control signal generation output circuit; Described isolation processing device 7,11 selects 4721; Light-coupled isolation processor 9 is selected TLP521; Random asccess memory 10 is selected A416316B.
Referring to Fig. 3, above-mentioned drive circuit 2 is selected the TLP250 chip, and the output of chip is through the 6th resistance R
6, the 7th resistance R
7Dividing potential drop drives high power transistor, and its connected mode is schemed referring to a: the VCC termination voltage of TLP250, two V
OEnd is connected and external series connection the 6th resistance R
6With the 7th resistance R
7, the 6th resistance R
6The first power transistor VT of low-voltage termination
1, the 7th resistance R
7The GND end of low-voltage end and the TLP250 also ground connection that links to each other.
Referring to Fig. 4, above-mentioned electric current and voltage detector 6 is by 1 amplifier LM358, the 17 resistance R
17With the 18 resistance R
18And 1 voltage stabilizing didoe D
5Consist of, its connected mode is the 17 resistance R
17With the 18 resistance R
18The series connection dividing potential drop is connected to the positive input of amplifier LM358, and the negative input of amplifier LM358 links to each other with its output, and the output of amplifier LM358 connects a voltage stabilizing didoe D simultaneously
5
Claims (7)
1. Active Magnetic Suspending Bearing system intelligence Switching Power Supply, comprise input rectifying filter (1), full-bridge high-frequency switch converters (2), high frequency transformer (3), output rectification filter device (4) and control circuit (5), it is characterized in that: the 220V city is electrically connected described input rectifying filter (1) input, the output of input rectifying filter (1) is connected 3 through full-bridge high-frequency switch converters (2) with high frequency transformer) after connect the input of output rectification filter device (4), the output of output rectification filter device (4) is connected to load; The input of described control circuit (5) connects the output of output rectification filter device (4), and output connects full-bridge high-frequency switch converters (2).
2. described Active Magnetic Suspending Bearing system intelligence Switching Power Supply according to claim 1, the circuit that it is characterized in that described input rectifying filter (1) is by 1 rectifier bridge KBPC3510 and the first filtering capacitor (C
1) and the second filtering capacitor (C
2) formation in parallel.
3. described Active Magnetic Suspending Bearing system intelligence Switching Power Supply according to claim 1, the circuit that it is characterized in that described full-bridge high-frequency switch converters (2) is by first power transistor (VT
1), second largest power transistor (VT
2), the third-largest power transistor (VT
3), the fourth-largest power transistor (VT
4), the first resistance (R
1), the second resistance (R
2), the 3rd resistance (R
3), the 4th resistance (R
4), the 3rd electric capacity (C
3), the 4th electric capacity (C
4), the 5th electric capacity 5(C
5), the 6th electric capacity (C
6) form; Described 4 high power transistor (VT
1~ VT
4) be divided into first power transistor and second largest power transistor (VT
1And VT
2), the third-largest power transistor and the fourth-largest power transistor (VT
3And VT
4) two pairs of two arms that consist of respectively full-bridge, described 4 resistance (R
1~ R
4) and 4 electric capacity (C
3~ C
6) be divided into four pairs: the first resistance and the 3rd electric capacity (R
1And C
3), the second resistance and the 4th electric capacity (R
2And C
4), the 3rd resistance and the 5th electric capacity (R
3And C
5), the 4th resistance and the 6th electric capacity (R
4And C
6) described 4 high power transistor (VT respectively in parallel connect respectively again
1~ VT
4), form four energy absorption loops.
4. described Active Magnetic Suspending Bearing system intelligence Switching Power Supply according to claim 1 is characterized in that described high frequency transformer (3) is to form take the EE55/21 magnetic core as the core coiling.
5. described Active Magnetic Suspending Bearing system intelligence Switching Power Supply according to claim 1 is characterized in that described output rectification filter device (4) is by the first fast recovery diode (D
1), the second fast recovery diode (D
2), the 3rd fast recovery diode (D
3) and the 4th fast recovery diode (D
4) consist of bridge rectifier, and its output series connection the first filter inductance (L
1) rear the 7th filter capacitor (C in parallel
7), the 8th filter capacitor (C
8); Described 4 fast recovery diode (D
1~ D
4) all select 30120RHRG, it is withstand voltage to be 1200V, rated current is 30A; The first filter inductance (L
1) select EE55/55/21; 2 filter capacitor (C
7, C
8) select the electrochemical capacitor parallel join of 2 220uF/200V, the total capacity that obtains is 440uF.
6. described Active Magnetic Suspending Bearing system intelligence Switching Power Supply according to claim 1 is characterized in that described control circuit (5) is by drive circuit (12), the second isolation processing device (11), DSP(8), light-coupled isolation processor (9), random asccess memory (10), the first isolation processing device (7) and electric current and voltage detector (6) consist of;
The input of described electric current and voltage detector (6) connects the output of described output rectification filter device (4), and its output is connected to DSP(8 behind the first isolation processing device (7)), described DSP(8) connects random asccess memory (10), described light-coupled isolation processor (9) input rotor speed signal, and output access DSP(8); DSP(8) output is connected to described full-bridge high-frequency switch converters (2) behind the second isolation processing device (11) and drive circuit (12).
7. described Active Magnetic Suspending Bearing system intelligence Switching Power Supply according to claim 6 is characterized in that described drive circuit (12) selects the TLP250 chip, and the output of chip is through the 6th resistance (R
6) and the 7th resistance (R
7) dividing potential drop driving high power transistor; Described DSP(8) selects TMS320F2812 chip and external 1 active crystal oscillator of 30M, the data storage chip CY7C1021 chip of 1 16 64K that extend out, reset circuit, data acquisition circuit, pwm control signal generation output circuit; Described electric current and voltage detector (6) is by 1 amplifier LM358, the 17 resistance (R
17) and the 18 resistance (R
18) and 1 voltage stabilizing didoe D
5Consist of, its connected mode is the 17 resistance (R
17) and the 18 resistance (R
18) the series connection dividing potential drop is connected to the positive input of amplifier LM358, the negative input of amplifier LM358 links to each other with its output, voltage stabilizing didoe D of the simultaneously output of amplifier LM358 connection
5Described the 7th isolation processing device (7), the 11 isolation processing device (11) select 4721; Light-coupled isolation processor (9) is selected TLP521; Random asccess memory (10) is selected A416316B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120429694 CN202679265U (en) | 2011-11-03 | 2011-11-03 | Intelligent switching power supply of active magnetic-suspension bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120429694 CN202679265U (en) | 2011-11-03 | 2011-11-03 | Intelligent switching power supply of active magnetic-suspension bearing system |
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| Publication Number | Publication Date |
|---|---|
| CN202679265U true CN202679265U (en) | 2013-01-16 |
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ID=47500137
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120429694 Expired - Fee Related CN202679265U (en) | 2011-11-03 | 2011-11-03 | Intelligent switching power supply of active magnetic-suspension bearing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019091297A1 (en) * | 2017-11-07 | 2019-05-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Power supply system for magnetic bearing and control method therefor |
-
2011
- 2011-11-03 CN CN 201120429694 patent/CN202679265U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019091297A1 (en) * | 2017-11-07 | 2019-05-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Power supply system for magnetic bearing and control method therefor |
| US11454278B2 (en) | 2017-11-07 | 2022-09-27 | Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai | Power supply system for magnetic bearing and control method therefor |
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| GR01 | Patent grant | ||
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