CN111933593A - Magnetic bearing power amplification module - Google Patents
Magnetic bearing power amplification module Download PDFInfo
- Publication number
- CN111933593A CN111933593A CN202011084289.1A CN202011084289A CN111933593A CN 111933593 A CN111933593 A CN 111933593A CN 202011084289 A CN202011084289 A CN 202011084289A CN 111933593 A CN111933593 A CN 111933593A
- Authority
- CN
- China
- Prior art keywords
- magnetic bearing
- power chip
- heat dissipation
- amplification module
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention provides a magnetic bearing power amplification module, which comprises a heat dissipation block, a power chip and a PCB (printed circuit board), wherein the power chip is fixed on a first surface of the heat dissipation block, a plurality of heat dissipation fins are arranged on the opposite surface of the first surface of the heat dissipation block, pins of the power chip are welded on the PCB, and the output end of the PCB is electrically connected with an electromagnetic coil of a magnetic bearing; the power chip is an integrated chip. The magnetic bearing power amplification module is simple in structure, small in size and high in integration level, the heat dissipation area of the power chip is increased through the heat dissipation block and the plurality of heat dissipation fins arranged on the heat dissipation block, the heat dissipation efficiency is improved, the operation performance and the service life of the power chip are guaranteed, the operation performance and the control precision of a magnetic bearing are guaranteed, and the operation stability and the control precision of a magnetic suspension system are improved.
Description
Technical Field
The invention relates to the technical field of magnetic suspension equipment, in particular to a magnetic bearing power amplification module.
Background
At present, with the continuous development of magnetic suspension technology, magnetic suspension bearing technology is applied to more and more occasions, such as high-speed rotating machinery, medical instruments, aerospace equipment and the like, and becomes the popular leading-edge technology in the world.
In the application process of the magnetic suspension bearing, an active electromagnetic bearing is adopted in most occasions, and the principle of the bearing is that a power amplifier drives a coil wound on a magnetic conductive material to generate a controllable magnetic field, and a rotor of the rotating machine is suspended in the air by magnetic force, so that the characteristics of friction-free, lubrication-free and noise-free magnetic suspension rotating machine are realized.
The power amplification modules used for magnetic suspension bearings are various, but the following defects generally exist: the heat dissipation performance is poor, so that the power chip can operate at a high temperature for a long time, and the working stability, the sensitivity and the service life of an electronic device are greatly influenced; the integration level is low, most of the power amplification modules which are widely used at present have the effect of full-bridge switches, and the power amplification modules have the defects of large volume, low integration level and the like.
Disclosure of Invention
The present invention is directed to solving the problems described above. It is an object of the present invention to provide a magnetic bearing power amplification module that solves the above problems. Specifically, the invention provides a magnetic bearing power amplification module which can effectively solve the problem of heat dissipation and improve the operation stability and control precision of a magnetic suspension system.
In order to solve the technical problem, the invention provides a magnetic bearing power amplification module, which comprises a heat dissipation block, a power chip and a PCB, wherein the power chip is fixed on the first surface of the heat dissipation block, and the heat dissipation block is used for dissipating heat of the power chip; the opposite surface of the first surface of the radiating block is provided with a plurality of radiating fins for enlarging the radiating area of the radiating block; the pin of the power chip is welded on the PCB, and the output end of the PCB is electrically connected with the electromagnetic coil of the magnetic bearing and used for sending the signal amplified by the power chip to the electromagnetic coil to generate an electromagnetic field; the power chip is an integrated chip.
The first surface of the heat dissipation block is provided with two grooves, and the power chip is fixed between the two grooves.
The magnetic bearing power amplification module also comprises a drive circuit arranged on the PCB, and the drive circuit is in signal connection with the input end of the magnetic bearing and is used for processing the signal sent by the power chip and sending the signal to the magnetic bearing so as to drive the magnetic bearing to operate.
The magnetic bearing power amplification module further comprises a fuse, and the fuse is arranged between the output end of the PCB and the electromagnetic coil of the magnetic bearing so as to protect the magnetic bearing and the power chip when the output current of the power chip exceeds a preset current threshold.
The power chip is provided with a temperature alarm output pin and an overcurrent alarm output pin.
And the output end of the power chip is provided with a filter circuit for filtering the power chip.
The filter circuit is an RC series filter circuit arranged between a first output pin and a second output pin of the power chip.
Wherein, a plurality of the radiating fins are arranged at equal intervals.
The magnetic bearing power amplification module has the advantages of simple structure, small volume and high integration level, increases the heat dissipation area of the power chip through the heat dissipation block and the plurality of heat dissipation fins arranged on the heat dissipation block, improves the heat dissipation efficiency, and ensures the operation performance and the service life of the power chip, thereby ensuring the operation performance and the control precision of the magnetic bearing, and improving the operation stability and the control precision of a magnetic suspension system.
Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 schematically shows a structural view of a magnetic bearing power amplification module of the present invention;
fig. 2 schematically shows a connection diagram of a power chip.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The scheme of the invention is that the power chip of the magnetic bearing power amplification module is provided with the heat dissipation block to improve the heat dissipation efficiency of the power chip, and the heat dissipation block is provided with the plurality of heat dissipation fins to further enlarge the heat dissipation area and improve the heat dissipation efficiency, thereby effectively ensuring the operation performance and the service life of the heat dissipation chip and ensuring the operation stability of the magnetic bearing.
The following describes the magnetic bearing power amplification module provided by the present invention in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view illustrating an embodiment of a magnetic bearing power amplification module according to the present invention, and referring to fig. 1, the magnetic bearing power amplification module includes a heat sink 1, a power chip 2, and a PCB 3. The power chip 2 is fixed on the first surface of the heat dissipation block 1, and the heat dissipation block 1 is used for dissipating heat and cooling the power chip 2 in operation, so that the operation performance of the power chip 2 is ensured. In this scheme, be provided with a plurality of fin 11 on the opposite face of the first face of radiating block 1 to increase radiating area of radiating block 1, further promote the radiating efficiency to power chip 2, ensure power chip 2's operating performance and life. Wherein, the plurality of radiating fins 11 can be arranged at equal intervals or unequal intervals; the plurality of fins 11 may be equal in thickness or different in thickness. For example, the power chip 2 may be fixedly connected to the heat dissipation block 1 by a fastening screw or the like 13, so as to sufficiently ensure connection stability between the two. In order to further ensure the stable connection between the power chip 2 and the heat dissipation block 1 and ensure the accurate installation between the power chip 2 and the heat dissipation block 1, the back surface of the power chip 2 and the heat dissipation block 1 can be bonded and pre-positioned by an adhesive and the like.
The pins of the power chip 2 are soldered on the PCB 3 and electrically connected to the circuits on the PCB 3, and the PCB 3 is provided with a control signal receiving port 31 and an output port 32. The output end 32 of the PCB 3 is electrically connected to the electromagnetic coil of the magnetic bearing, so as to send the electrical signal processed by the power chip 2 and the circuit on the PCB 3 to the electromagnetic coil of the magnetic bearing, and the magnetic bearing generates sufficient electromagnetic field to ensure the stable suspension of the rotor of the magnetic suspension system. The control signal receiving port 31 is used for receiving an adjusting signal sent by a controller or other control mechanisms, the adjusting signal is converted into magnetic bearing driving current after being processed by the power chip 2 and the circuit on the PCB 3, and the magnetic bearing driving current is output to the electromagnetic coil of the magnetic bearing through the output end 32 of the PCB 3 so as to drive the magnetic bearing to operate. For example, the control signal receiving port and the output terminal on the PCB 3 may be electrically connected in a plugging manner, so as to improve the convenience of assembly and disassembly, and the operational stability and reliability of the magnetic bearing power amplification module.
In order to improve the integration of the power amplification module, the power chip 2 may be an integrated chip.
In the embodiment shown in fig. 1, two recesses 12 are provided on the first side of the heat slug 1, and the power chip 2 is fixed between the two recesses 12. The two grooves 12 are arranged corresponding to the pins of the power chip 2 to avoid the pins of the power chip 2, so that heat generated by the power chip 2 is conducted onto the heat dissipation block 1 to dissipate heat at the highest speed, the connection stability between the power chip 2 and the heat dissipation block 1 is ensured, and the pin performance of the power chip 2 is not affected.
In addition, the magnetic bearing power amplification module of the invention also comprises a drive circuit 4 arranged on the PCB 3, the drive circuit 4 is in signal connection with the input end of the magnetic bearing and is used for processing the signal processed by the power chip 2 and sending the signal to the magnetic bearing to drive the magnetic bearing to start.
Fig. 2 is a schematic diagram illustrating connection of the power chip 2 in a specific embodiment, and referring to fig. 2, in this embodiment, the DIR pin of the power chip 2 is used for receiving an enable signal sent by a controller or other control mechanism, and whether the power chip 2 enters an operating state is determined according to the enable signal; the PWM pin is used for receiving a digital pulse signal sent by a controller or other control mechanisms and outputting current signals with different sizes according to the duty ratio and the frequency of the digital pulse signal; the ThermalF0 pin is used for outputting temperature alarm of the power chip 2, namely when the temperature of the power chip 2 exceeds a preset threshold value, the pin sends an alarm signal to a controller or other control mechanisms; the resistor R2 is a current-limiting resistor, so that the damage or the burning of the corresponding chips or components of the controller or other control mechanisms for receiving the alarm signal due to the overlarge output current is prevented; a CurrenS0 pin is an overcurrent alarm output pin, and R3 is serially connected between the overcurrent alarm output pin CurrrentS0 and a grounding pin GND for shielding overcurrent alarm signals; the capacitors C1 and C2 are respectively connected between the first output pin OUT1 and the BootS1 pin and between the second output pin OUT2 and BootS2, so as to play a role in filtering; r1 and C3 form an RC series filter circuit for reducing noise in the current output to the solenoid coil, and the filter frequency f0 is determined by the resistance value of R1 and the capacitance value of C3 de: f0=1/(2 π R1C 3).
In this scheme, the magnetic bearing power amplification module further includes a fuse 5, and the fuse 5 is disposed between the output end of the PCB board 3 and the electromagnetic coil of the magnetic bearing. Illustratively, the fuse 5 may be a miniature fuse. When the output current of the power chip 2 exceeds the preset current threshold, the fuse 5 will be automatically burnt out to protect the magnetic bearing and the power chip 2. The circuit break occurs at the moment, and after the maintenance and fault removal of workers, the fuse 5 only needs to be replaced, so that the maintenance efficiency is effectively improved, the maintenance cost is reduced, and the operation performance of the power chip 2 and the magnetic bearing is ensured.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The magnetic bearing power amplification module is characterized by comprising a heat dissipation block (1), a power chip (2) and a PCB (3), wherein the power chip (2) is fixed on a first surface of the heat dissipation block (1), the power chip (2) is dissipated through the heat dissipation block (1), and a plurality of heat dissipation fins (11) are arranged on the opposite surface of the first surface of the heat dissipation block (1) and used for enlarging the heat dissipation area of the heat dissipation block (1); pins of the power chip (2) are welded on the PCB (3), and the output end of the PCB (3) is electrically connected with an electromagnetic coil of the magnetic bearing and used for processing the electric signal amplified by the power chip (2) and then sending the electric signal to the electromagnetic coil to generate an electromagnetic field;
the power chip (2) is an integrated chip.
2. The magnetic bearing power amplification module of claim 1, wherein the heat slug (1) is provided with two recesses (12) on a first face thereof, the power chip (2) being secured between the two recesses (12).
3. The magnetic bearing power amplification module of claim 1, further comprising a drive circuit (4) disposed on the PCB board (3), wherein the drive circuit (4) is in signal connection with an input terminal of the magnetic bearing for processing a signal from the power chip (2) and transmitting the signal to the magnetic bearing to drive the magnetic bearing to operate.
4. The magnetic bearing power amplification module of claim 1, further comprising a fuse (5), the fuse (5) being disposed between the output of the PCB board (3) and the electromagnetic coil of the magnetic bearing to protect the magnetic bearing and the power chip (2) when the output current of the power chip (2) exceeds a preset current threshold.
5. The magnetic bearing power amplification module of claim 2 wherein a temperature alarm output pin and an over-current alarm output pin are provided on the power chip (2).
6. The magnetic bearing power amplification module of claim 1, wherein the output of the power chip (2) is provided with a filter circuit to filter out the power chip (2).
7. The magnetic bearing power amplification module of claim 6, wherein the filter circuit is an RC series filter circuit disposed between the first and second output pins of the power chip (2).
8. The magnetic bearing power amplification module of claim 1, wherein a plurality of the heat sinks (11) are equally spaced.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084289.1A CN111933593A (en) | 2020-10-12 | 2020-10-12 | Magnetic bearing power amplification module |
| CN202120717829.9U CN214676300U (en) | 2020-10-12 | 2021-04-06 | Magnetic bearing power amplification module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084289.1A CN111933593A (en) | 2020-10-12 | 2020-10-12 | Magnetic bearing power amplification module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111933593A true CN111933593A (en) | 2020-11-13 |
Family
ID=73334352
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011084289.1A Pending CN111933593A (en) | 2020-10-12 | 2020-10-12 | Magnetic bearing power amplification module |
| CN202120717829.9U Active CN214676300U (en) | 2020-10-12 | 2021-04-06 | Magnetic bearing power amplification module |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120717829.9U Active CN214676300U (en) | 2020-10-12 | 2021-04-06 | Magnetic bearing power amplification module |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN111933593A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719716A (en) * | 2005-07-08 | 2006-01-11 | 北京航空航天大学 | High-performance integrated magnetic suspension flywheel magnetic bearing digital controller |
| CN101742819A (en) * | 2008-11-21 | 2010-06-16 | 鸿富锦精密工业（深圳）有限公司 | Circuit board composite |
| CN105974790A (en) * | 2016-05-26 | 2016-09-28 | 北京控制工程研究所 | Flux-density-feedback-based magnetic-levitation micro vibration control system |
| CN107105596A (en) * | 2016-02-23 | 2017-08-29 | 中兴通讯股份有限公司 | Radiating subassembly |
| CN107769659A (en) * | 2017-12-01 | 2018-03-06 | 西安航天精密机电研究所 | Used in high-speed motor magnetic suspension bearing integral control system and control method |
-
2020
- 2020-10-12 CN CN202011084289.1A patent/CN111933593A/en active Pending
-
2021
- 2021-04-06 CN CN202120717829.9U patent/CN214676300U/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719716A (en) * | 2005-07-08 | 2006-01-11 | 北京航空航天大学 | High-performance integrated magnetic suspension flywheel magnetic bearing digital controller |
| CN101742819A (en) * | 2008-11-21 | 2010-06-16 | 鸿富锦精密工业（深圳）有限公司 | Circuit board composite |
| CN107105596A (en) * | 2016-02-23 | 2017-08-29 | 中兴通讯股份有限公司 | Radiating subassembly |
| CN105974790A (en) * | 2016-05-26 | 2016-09-28 | 北京控制工程研究所 | Flux-density-feedback-based magnetic-levitation micro vibration control system |
| CN107769659A (en) * | 2017-12-01 | 2018-03-06 | 西安航天精密机电研究所 | Used in high-speed motor magnetic suspension bearing integral control system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN214676300U (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10027268B2 (en) | Motor incorporating power converter, and air conditioner, water heater, and ventilation blower incorporating the motor | |
| CN201075819Y (en) | Fan system and soft start circuit module thereof | |
| JP2017529044A (en) | Charging circuit and mobile terminal | |
| CN214676300U (en) | Magnetic bearing power amplification module | |
| WO2023115832A1 (en) | Apparatus for suppressing peak pulse at input end of hot plug line | |
| CN101694938A (en) | Surging current suppression method | |
| US10389270B2 (en) | Power conversion device | |
| CN109412389B (en) | Power supply conversion device | |
| EP2276329A1 (en) | Electronic circuit board with a thermal capacitor | |
| CN110958771B (en) | Integrated circuit board and electronic equipment | |
| US20110140553A1 (en) | Fan stator cover structure | |
| JP4389573B2 (en) | Power supply | |
| JP2011082296A (en) | Electronic component mounting printed wiring board | |
| US20120081004A1 (en) | Light emitting diode system | |
| US9312067B2 (en) | Sheet formed inductive winding | |
| WO2018209605A1 (en) | Brushless electric tool | |
| CN115589702B (en) | Electronic device and heat dissipation control method | |
| CN103747662A (en) | Fan controller | |
| CN213028689U (en) | Component circuit board capable of rapidly dissipating heat | |
| CN220554231U (en) | High-frequency copper-based sintered printed circuit board capable of automatically radiating heat | |
| CN218162940U (en) | Driving chip with LED short-circuit protection | |
| CN209843407U (en) | Miniaturized chip resistor | |
| CN215414238U (en) | Water leakage detection circuit on printed circuit board | |
| CN203708741U (en) | Fan controller | |
| CN217010681U (en) | Mounting structure of high-power switch device absorption resistor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201113 |