CN115218771B - Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower - Google Patents

Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower Download PDF

Info

Publication number
CN115218771B
CN115218771B CN202210815496.2A CN202210815496A CN115218771B CN 115218771 B CN115218771 B CN 115218771B CN 202210815496 A CN202210815496 A CN 202210815496A CN 115218771 B CN115218771 B CN 115218771B
Authority
CN
China
Prior art keywords
displacement sensor
temperature
output voltage
eddy current
value
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.)
Active
Application number
CN202210815496.2A
Other languages
Chinese (zh)
Other versions
CN115218771A (en
Inventor
吴炎
李大同
刘晋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Huadong Fan Co ltd
Original Assignee
Shandong Huadong Fan Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Huadong Fan Co ltd filed Critical Shandong Huadong Fan Co ltd
Priority to CN202210815496.2A priority Critical patent/CN115218771B/en
Publication of CN115218771A publication Critical patent/CN115218771A/en
Application granted granted Critical
Publication of CN115218771B publication Critical patent/CN115218771B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The application provides a temperature compensation method and system for an eddy current displacement sensor of a magnetic suspension blower. The method comprises the following steps: acquiring a curve of the output voltage signal value of the eddy current displacement sensor changing along with the position change of a rotor of the magnetic suspension blower at normal temperature, and determining an optimal working point; dividing a temperature range between a lowest temperature value of a working environment of the magnetic suspension blower and a highest temperature value of a stator of the magnetic suspension blower into N temperature change intervals, wherein N is a positive integer; measuring delta T in temperature change interval of eddy current displacement sensor i When the current vortex displacement sensor is at the optimal working point, the current vortex displacement sensor outputs the actual voltage under the real working environment; according to a standard temperature interval Delta T s And correcting the output voltage of the eddy current displacement sensor by the voltage of the internal optimal working point and the actual output voltage of the eddy current displacement sensor in the real working environment. The technical scheme of this application can reduce the influence of temperature to displacement sensor, improves the suspension precision of magnetic suspension centrifugal blower rotor.

Description

Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower
Technical Field
The application relates to a magnetic suspension blower, in particular to a temperature compensation method and system for an eddy current displacement sensor of a magnetic suspension blower.
Background
The air blower has wide application field, and the figure of the air blower can be seen from daily life to the aerospace field. The types of blowers vary and include, for example, roots blowers, rotary blowers, centrifugal blowers, and the like. Because the rotor of the magnetic suspension centrifugal blower is in no contact with the bearing and has no friction, the energy-saving effect is good, the market acceptance is higher and higher at present, and the market application scene is wider.
The higher the power of the magnetic suspension centrifugal blower is, the more obvious the energy-saving effect is, so the power of the magnetic suspension centrifugal blower sold on the market is usually not lower than 50kw. However, in the working process of the magnetic suspension centrifugal blower, the temperature of the blower body is high, even if the blower body is driven by a permanent magnet synchronous motor with higher energy efficiency, the temperature of the blower body is often close to 100 ℃ or even higher, the conventional eddy current displacement sensor can only be adapted to the actual working environment temperature of the magnetic suspension centrifugal blower, and is usually-20 ℃ to 50 ℃, the normal working temperature of the eddy current displacement sensor is usually not more than 40 ℃, a few eddy current displacement sensors can only not be more than 80 ℃, and obviously the operating requirements can not be met.
Disclosure of Invention
In view of this, the present application provides a temperature compensation method and system for an eddy current displacement sensor of a magnetic suspension blower.
According to one aspect of the application, a method for temperature compensation of an eddy current displacement sensor of a magnetic levitation blower is provided, which comprises the following steps:
acquiring a curve of the output voltage signal value of the eddy current displacement sensor changing along with the position change of a rotor of the magnetic suspension blower at normal temperature, and determining an optimal working point;
dividing the temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower into N temperature change intervals, wherein the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer;
measuring delta T in temperature change interval of eddy current displacement sensor i When the current vortex displacement sensor is at the optimal working point, the actual output voltage of the current vortex displacement sensor under the real working environment is represented by i which is a positive integer and is more than or equal to 1 and less than or equal to N;
according to a standard temperature interval Delta T s And correcting the output voltage of the eddy current displacement sensor by the voltage corresponding to the internal optimal working point and the actual output voltage of the eddy current displacement sensor in the real working environment.
Preferably, the method further comprises: at temperature variation interval Delta T i Actual output voltage value array U of internal sampling eddy current displacement sensor in real working environment ij Inductance value series L of current vortex displacement sensor coil ij And a coil resistance value array R ij Wherein j is more than or equal to 1 and less than or equal to n, j and n are whole integers, and n is delta T in the temperature change interval i The number of sample points.
Preferably, the temperature variation interval Δ T i Comprises a uniform temperature rise stage, a heat preservation stage and a furnace cooling stage。
Preferably, the method further comprises a temperature change interval Δ T i Internal calculation actual output voltage value sequence U ij Average value of (2)
Figure 127118DEST_PATH_IMAGE001
Inductance value series L of current vortex displacement sensor coil ij Average value of (2)
Figure 492240DEST_PATH_IMAGE002
And a coil resistance value array R ij Average value of (2)
Figure 646141DEST_PATH_IMAGE003
；
Figure 371389DEST_PATH_IMAGE004
；
Figure 51769DEST_PATH_IMAGE005
；
Figure 197580DEST_PATH_IMAGE006
。
Preferably, the method further comprises:
at temperature variation interval Delta T i Inner, the inductance value sequence L of the current vortex displacement sensor coil ij Average value of (2)
Figure 714143DEST_PATH_IMAGE007
And a coil resistance value array R ij Average value of (2)
Figure 728235DEST_PATH_IMAGE008
Substituting the circuit model of the eddy current displacement sensor to calculate and obtain the calculated value of the output voltage
Figure 669646DEST_PATH_IMAGE009
And is connected to the actual output voltage in series U ij Average value of (2)
Figure 363189DEST_PATH_IMAGE010
And comparing and determining the actual output voltage to be corrected.
Preferably, the method further comprises:
the actual output voltage to be corrected is separated from the standard temperature range delta T s The difference between the corresponding voltages is inverted, and the operation output voltage is added to the inverted result to obtain the corrected actual output voltage, wherein the standard temperature interval delta T s Is a temperature interval at normal temperature, a length of the temperature interval and delta T i The same is true.
The application also provides a magnetic suspension blower eddy current displacement sensor temperature compensation system, includes:
a sampling module for sampling the temperature change interval delta T of the eddy current displacement sensor i When the current vortex displacement sensor is at the optimal working point, the actual output voltage of the current vortex displacement sensor under the real working environment is represented by i which is a positive integer and is more than or equal to 1 and less than or equal to N; the temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower is divided into N temperature change intervals, and the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer;
the sensor control module is used for processing the displacement signal sensed by the eddy current displacement sensor to form a voltage signal;
a magnetic bearing control module for controlling the magnetic bearing according to a standard temperature interval Delta T s Correcting the output voltage of the eddy current displacement sensor by the voltage corresponding to the internal optimal working point and the actual output voltage of the eddy current displacement sensor in a real working environment, converting the output voltage into a control signal and inputting the control signal to the power amplification module;
and the power amplification module is used for amplifying the control signal transmitted by the magnetic bearing control module and outputting corresponding exciting current to control the position of the rotor of the magnetic suspension blower.
Preferably, the sampling module is further used for sampling the actual output electricity of the eddy current displacement sensor in the real working environmentArray of pressing U ij Inductance value series L of current vortex displacement sensor coil ij And a coil resistance value array R ij The temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower is divided into N temperature change intervals, and the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer, i is more than or equal to 1 and less than or equal to N, j is more than or equal to 1 and less than or equal to N, j and N are whole integers, and N is delta T in the temperature change interval i The number of sampling points;
a magnetic bearing control module for controlling the magnetic bearing i Internal calculation actual output voltage value sequence U ij Average value of (2)
Figure 757261DEST_PATH_IMAGE011
Inductance value series L of current vortex displacement sensor coil ij Average value of (2)
Figure 575045DEST_PATH_IMAGE012
And a coil resistance value array R ij Average value of (2)
Figure 715170DEST_PATH_IMAGE013
；
Figure 468362DEST_PATH_IMAGE014
；
Figure 474365DEST_PATH_IMAGE015
；
Figure 705626DEST_PATH_IMAGE016
。
Preferably, the magnetic bearing control module is also used for the temperature change interval Delta T i Inner, the inductance value series L of the current vortex displacement sensor coil ij Average value of (2)
Figure 729951DEST_PATH_IMAGE017
And a coil resistance value array R ij Average value of (2)
Figure 388466DEST_PATH_IMAGE018
Substituting the circuit model of the eddy current displacement sensor to calculate to obtain the calculated value of the output voltage
Figure 616185DEST_PATH_IMAGE019
And is connected to the actual output voltage in series U ij Average value of (2)
Figure 526503DEST_PATH_IMAGE020
And comparing and determining the actual output voltage to be corrected.
Preferably, the magnetic bearing control module is also used for enabling the actual output voltage to be corrected to be within a standard temperature interval delta T s The difference between the voltages corresponding to the internal optimal working point is inverted, and the operation output voltage is added with the inverted result to obtain the corrected actual output voltage, wherein the standard temperature interval delta T s Is a temperature interval at normal temperature, a length of the temperature interval and delta T i The same is true.
According to the technical scheme of this application, through revising sensor actual operation result, can reduce the influence of temperature to displacement sensor, improve the suspension precision of magnetic suspension centrifugal blower rotor.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application, and the illustrative embodiments and descriptions thereof are used to explain the application. In the drawings:
FIG. 1 is a schematic diagram of a temperature compensation system of an eddy current displacement sensor of a magnetic suspension blower;
FIG. 2 is a flow chart of a temperature compensation method for an eddy current displacement sensor of a magnetic suspension blower;
FIG. 3 is a graph showing the variation of the output voltage signal value of the eddy current displacement sensor with the position of the conductor to be measured;
fig. 4 is a schematic diagram of an eddy current displacement sensor circuit model.
Detailed Description
In addition, the features of the embodiments and the respective embodiments in the present application may be combined with each other without conflict.
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The magnetic suspension centrifugal blower compensation system provided by the embodiment of the application is shown in fig. 1 and comprises a sampling module, a sensor control module, a magnetic bearing control module and a power amplification module. Preferably, a PLC module is also included. And the sampling module is used for sampling signals of the eddy current displacement sensor (namely the probe) and the temperature sensor (namely pt 100). And the PLC module is mainly used for displaying signals of the eddy current displacement sensor and the temperature sensor in channels. Two magnets are shown in fig. 1, oppositely disposed: electromagnet A and electromagnet B.
The sampling module is used for sampling the actual output voltage sequence U of the eddy current displacement sensor in the real working environment ij Inductance value series L of current vortex displacement sensor coil ij And a coil resistance value array R ij The temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower is divided into N temperature change intervals, and the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer, i is more than or equal to 1 and less than or equal to N, j is more than or equal to 1 and less than or equal to N, j and N are whole integers, and N is delta T in a temperature change interval i The number of sampling points;
the sensor control module is used for processing the displacement signal sensed by the eddy current displacement sensor to form a voltage signal; the signal is output to the PLC module for data recording and displaying, and is simultaneously transmitted to the magnetic bearing controller to participate in the magnetic bearing control.
Magnetic bearing control module based on standard temperature interval delta T s Voltage corresponding to internal optimal working point and actual output voltage of eddy current displacement sensor in real working environment to eddy current displacementThe output voltage of the sensor is corrected and converted into a control signal which is input to the power amplification module.
And the power amplification module is used for amplifying the control signal transmitted by the magnetic bearing control module and outputting corresponding exciting current to control the position of the magnetic bearing rotor and simultaneously transmitting the current change value to the PLC module.
The PLC module records a displacement signal output by the displacement sensor, converts the displacement signal into a conventional position signal and displays the conventional position signal on a screen; and simultaneously recording a current signal output by the power amplification module, and simultaneously judging the position deviation and the stress deviation of the rotor part of the magnetic bearing according to the current signal and the displacement signal. The PLC module can comprise a plurality of channels and simultaneously records time, temperature and output voltage of the displacement sensor.
Correspondingly, the application also provides a temperature compensation method for the eddy current displacement sensor of the magnetic suspension centrifugal blower, which comprises the following steps:
step 201, obtaining a curve that the output voltage signal value of the eddy current displacement sensor changes along with the position change of a measured conductor (a magnetic suspension centrifugal blower rotor) at normal temperature (25 ℃), determining a linear range and an optimal working point as shown in fig. 3, wherein the linear range refers to a part of the linear change range of the sensor position and the output voltage, the middle point of the linear range is the optimal working point, also called the optimal linear point, and the distance between the middle point and the optimal working point is just equal to the position of the sensor when the rotor is suspended in the middle;
step 202, determining the minimum value T of the environmental temperature when the magnetic suspension centrifugal blower works 1 And maximum value of stator temperature T 2 Will T 2 -T 1 Divided into N temperature change intervals Δ T, i.e., Δ T = (T) 2 -T 1 ）/N；
Step 203, change the temperature range Δ T i ∈（T imin ，T imax ) Comprises a constant-speed heating stage, a heat preservation stage and a furnace cooling stage, wherein the temperature is T imin Heating to T imax Time is Deltat i1 (ii) a At T imax The holding time is delta t i2 ；T imax Cooling to T imin Time is Deltat i3 (ii) a At T imin The holding time is delta t i4 (ii) a The sampling frequency is f, the number of sampling points n = f (Δ t) i1 +Δt i2 +Δt i3 +Δt i4 ) And then respectively obtaining a numerical sequence U of actual output voltage values of the sensor under the simulated environment i Probe coil inductance value array L i And a coil resistance value array R i （1≤j≤n，j∈N + ），1≤i≤N，i∈N + . During heat preservation, if the actual output voltage signal value U of the sensor is kept unchanged for a long time, sampling is stopped, and unchanged sampling value elimination does not participate in average value calculation. At a temperature interval DeltaT i For example, a temperature sensor detects temperature, a voltage sensor detects output voltage, a high-precision inductance meter detects inductance, and a direct-current resistance meter detects resistance. The constant-speed heating stage and the furnace cooling stage are mutually verified, namely the output voltage when the temperature is raised to a certain temperature T is compared with the output voltage at the temperature when the temperature is cooled, and if the difference is found, the average value is taken as the voltage output at the temperature. In the temperature interval Delta T i And controlling the rotor to be suspended in the middle, namely controlling the position of the distance sensor to be just at the optimal working point, and respectively measuring the parameters such as the temperature, the voltage, the inductance, the resistance and the like in the state.
Step 204, the temperature variation interval Δ T i In the method, weighted average values are obtained by corresponding the output voltage values of the sensors, the inductance values of the probe coils and the resistance values of the coils at different temperatures, and the average value of the actual output voltage signals of the sensors under the simulated environment is
Figure 31434DEST_PATH_IMAGE021
Average value of inductance of probe coil
Figure 454325DEST_PATH_IMAGE022
Average value of coil resistance
Figure 675398DEST_PATH_IMAGE023
。
Step 205, averaging the inductance of the probe coil
Figure 514041DEST_PATH_IMAGE024
Average value of coil resistance
Figure 732532DEST_PATH_IMAGE025
Substituting the calculated value of the output voltage of the sensor probe into a circuit model of the eddy current displacement sensor
Figure 608216DEST_PATH_IMAGE026
And the average value of the voltage signal and the actual output voltage signal of the sensor under the simulated environment
Figure 685893DEST_PATH_IMAGE027
Comparing, and if the difference is large, such as greater than 1V, calculating the weighted average of the two as an actual voltage signal; if the difference is small, the actual voltage signal is directly output, the circuit model and the relation are shown in FIG. 4, U 1 Is the calculated value of the output voltage
Figure 921702DEST_PATH_IMAGE028
. I.e. calculated at the output voltage
Figure 509547DEST_PATH_IMAGE029
With actual output voltage sequence U ij Average value of (2)
Figure 805400DEST_PATH_IMAGE030
If the difference exceeds the preset range, the calculated value of the output voltage is calculated
Figure 370373DEST_PATH_IMAGE031
And the actual output voltage array U ij Average value of (2)
Figure 160606DEST_PATH_IMAGE032
Carrying out weighted average, wherein the result of the weighted average is used as the actual output voltage to be corrected; otherwise, the actual output voltage is numbered in sequence U ij Average value of (2)
Figure 353690DEST_PATH_IMAGE033
As the actual output voltage to be corrected. Need to make sure thatWeighted average by a value at i The voltage signal value directly output internally, and the actual voltage signal obtained by collecting the coil inductance and the direct current resistance and substituting the collected coil inductance and the direct current resistance into a circuit model of the output voltage are subjected to weighted average calculation
Figure 961388DEST_PATH_IMAGE034
And a represents a weighting coefficient which is used for eliminating the drift brought by the circuit part of the sensor control module and is determined according to an experimental result.
Figure 124910DEST_PATH_IMAGE035
，R 1 And L 1 Is the resistance and inductance of the sensor coil, R 2 And L 2 The equivalent resistance and the equivalent inductance of a magnetic suspension blower rotor eddy current loop coil, C is coupling capacitance, M is mutual inductance coefficient, R is S Is a coupling resistor (with the sensor coil L) 1 Coupling capacitor C forming a resonant circuit), U 0 In order to excite the peak value of the signal,
Figure 968101DEST_PATH_IMAGE036
is the circuit operating angular frequency.
It should be noted that the actual output voltage signal of the sensor in the simulated environment is the output voltage signal when the position of the rotor is just above the optimal operating point from the sensor.
Step 206, convert Δ T i The actual voltage signal and the standard temperature interval delta T are obtained s And the difference of the internal corresponding actual voltage signals is inverted and added to the operation output voltage, namely the actual output voltage signal of the compensated displacement sensor. Note that the standard temperature interval Δ T s The actual voltage signal corresponding to the temperature difference is within the standard temperature range delta T s And the output voltage signal when the position of the rotor distance sensor is just at the optimal working point. When in the temperature change interval delta T i And correcting the displacement sensor of the operating equipment according to the result, and eliminating the influence of temperature drift on the displacement sensor. The voltage signal is output to a magnetic bearing controller for controlling the position of the rotor; and alsoThe voltage signal can be converted into a displacement value to be displayed on a screen. If the difference value is a positive value, the negative value is obtained after negation, and the negative value is added to the voltage output under the current high-temperature environment, namely the voltage is reduced; if the difference is negative, and after negation, a positive value is added to the reduced output value in the high-temperature environment, the temperature reduced due to temperature rise can be compensated. Delta T s Is a temperature interval corresponding to the temperature around 25 ℃, and the length of the interval is consistent with other intervals. Will be Delta T i The actual weighted voltage signal U and the standard temperature range DeltaT s Corresponding actual voltage signal differencing (where Δ T s In a temperature interval around 25 ℃, the length of the interval is consistent with that of other intervals), and the obtained difference is added to the current actual output voltage value after being inverted, namely the compensated output voltage value.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. A temperature compensation method for an eddy current displacement sensor of a magnetic suspension blower is characterized by comprising the following steps:
acquiring a curve of the output voltage signal value of the eddy current displacement sensor changing along with the position change of a rotor of the magnetic suspension blower at normal temperature, and determining an optimal working point;
dividing the temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower into N temperature change intervals, wherein the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer;
measuring delta T in temperature change interval of eddy current displacement sensor i When the current vortex displacement sensor is at the optimal working point, the actual output voltage of the current vortex displacement sensor under the real working environment, i is a positive integer, and i is more than or equal to 1 and less than or equal to N;
according to a standard temperature interval Delta T s Voltage corresponding to internal optimal working point and eddy current displacement sensor under real working environmentThe actual output voltage of (2) corrects the output voltage of the eddy current displacement sensor.
2. The method of claim 1, further comprising: at temperature variation interval Delta T i Actual output voltage value array U of internal sampling eddy current displacement sensor in real working environment ij Inductance value series L of current vortex displacement sensor coil ij And a coil resistance value array R ij Wherein j is more than or equal to 1 and less than or equal to n, j and n are positive integers, and n is delta T in the temperature change interval i The number of sample points.
3. Method according to claim 1, characterized in that the temperature variation interval Δ T i Comprises a constant-speed heating stage, a heat preservation stage and a furnace cooling stage.
4. The method of claim 1, further comprising a delta T over the temperature change interval i Internal calculation actual output voltage value sequence U ij Average value of (2)
Figure QLYQS_1
Series L of inductance values of coils of eddy current displacement sensor ij Average value of (2)
Figure QLYQS_2
And a coil resistance value array R ij Average value of (2)
Figure QLYQS_3
；
Figure QLYQS_4
；
Figure QLYQS_5
；
Figure QLYQS_6
。
5. The method of claim 4, further comprising:
at temperature variation interval Delta T i Inner, the inductance value series L of the current vortex displacement sensor coil ij Average value of (2)
Figure QLYQS_7
And a coil resistance value array R ij Average value of (2)
Figure QLYQS_8
Substituting the circuit model of the eddy current displacement sensor to calculate and obtain the calculated value of the output voltage
Figure QLYQS_9
And is connected to the actual output voltage in series U ij Average value of (2)
Figure QLYQS_10
And comparing and determining the actual output voltage to be corrected.
6. The method of claim 5, further comprising:
the actual output voltage to be corrected is separated from the standard temperature range delta T s The difference between the corresponding voltages is inverted, and the running output voltage and the inverted result are added to obtain the corrected actual output voltage, wherein the standard temperature interval delta T s Is a temperature interval at normal temperature, a temperature interval length and delta T i The same is true.
7. A temperature compensation system for an eddy current displacement sensor of a magnetic suspension blower is characterized by comprising:
a sampling module for sampling the temperature change interval Delta T of the eddy current displacement sensor i When the current vortex displacement sensor is at the optimum working point, the current vortex displacement sensor is in real working environmentThe i is a positive integer, and is more than or equal to 1 and less than or equal to N; the temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower is divided into N temperature change intervals, and the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer;
the sensor control module is used for processing the displacement signal sensed by the eddy current displacement sensor to form a voltage signal;
magnetic bearing control module based on standard temperature interval delta T s Correcting the output voltage of the eddy current displacement sensor by the voltage corresponding to the internal optimal working point and the actual output voltage of the eddy current displacement sensor in a real working environment, converting the output voltage into a control signal and inputting the control signal to the power amplification module;
and the power amplification module is used for amplifying the control signal transmitted by the magnetic bearing control module and outputting corresponding exciting current to control the position of the rotor of the magnetic suspension blower.
8. The system of claim 7, wherein the sampling module is further configured to sample the actual output voltage sequence U of the eddy current displacement sensor under the real operating environment ij Inductance value series L of current vortex displacement sensor coil ij And a coil resistance value array R ij The temperature range between the lowest temperature value of the working environment of the magnetic suspension blower and the highest temperature value of the stator of the magnetic suspension blower is divided into N temperature change intervals, and the temperature change intervals comprise delta T 1 ，ΔT 2 ，ΔT 3 ，……，ΔT N Wherein N is a positive integer, i is more than or equal to 1 and less than or equal to N, j is more than or equal to 1 and less than or equal to N, j and N are positive integers, and N is delta T in the temperature change interval i The number of sampling points;
a magnetic bearing control module for controlling the magnetic bearing i Internal calculation actual output voltage value sequence U ij Average value of (2)
Figure QLYQS_11
Inductance of eddy current displacement sensor coilSequence of values L ij Average value of (2)
Figure QLYQS_12
And a coil resistance value array R ij Average value of (2)
Figure QLYQS_13
；
Figure QLYQS_14
；
Figure QLYQS_15
；
Figure QLYQS_16
。
9. The system of claim 8, wherein the magnetic bearing control module is further configured to control the magnetic bearing during the temperature change interval Δ T i Inner, the inductance value series L of the current vortex displacement sensor coil ij Average value of (2)
Figure QLYQS_17
And a coil resistance value array R ij Average value of (2)
Figure QLYQS_18
Substituting the circuit model of the eddy current displacement sensor to calculate and obtain the calculated value of the output voltage
Figure QLYQS_19
And is connected to the actual output voltage in series U ij Average value of (2)
Figure QLYQS_20
And comparing and determining the actual output voltage to be corrected.
10. The system of claim 9The system is characterized in that the magnetic bearing control module is also used for comparing the actual output voltage to be corrected with the standard temperature interval delta T s The difference of the voltages corresponding to the internal optimal working point is inverted, and the operation output voltage is added with the inverted result to obtain the corrected actual output voltage, wherein the standard temperature interval delta T s Is a temperature interval at normal temperature, a length of the temperature interval and delta T i The same is true.
CN202210815496.2A 2022-07-12 2022-07-12 Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower Active CN115218771B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210815496.2A CN115218771B (en) 2022-07-12 2022-07-12 Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210815496.2A CN115218771B (en) 2022-07-12 2022-07-12 Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower

Publications (2)

Publication Number Publication Date
CN115218771A CN115218771A (en) 2022-10-21
CN115218771B true CN115218771B (en) 2023-04-07

Family

ID=83612603

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210815496.2A Active CN115218771B (en) 2022-07-12 2022-07-12 Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower

Country Status (1)

Country Link
CN (1) CN115218771B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116086300B (en) * 2023-04-07 2023-06-09 苏州中科科仪技术发展有限公司 Calibration method of magnetic suspension molecular pump displacement sensor and application thereof
CN116182765B (en) * 2023-04-27 2023-06-30 山东华东风机有限公司 Self-calibration control method and device of displacement sensor based on magnetic suspension bearing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1587894A (en) * 2004-08-18 2005-03-02 浙江大学 Temperature compensation method for electric eddy shift sensor
CN103471641A (en) * 2013-09-03 2013-12-25 中国科学技术大学 Method for automatically correcting temperature drift of electrical vortex sensor
CN104729396A (en) * 2015-03-24 2015-06-24 浙江大学 High-temperature eddy-current displacement sensor temperature compensation method based on temperature online measurement and sensing device
CN204757913U (en) * 2015-03-24 2015-11-11 浙江大学 High temperature current vortex displacement sensing device based on temperature on line measurement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10684148B2 (en) * 2018-07-10 2020-06-16 Epro Gmbh Temperature compensation for eddy current sensors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1587894A (en) * 2004-08-18 2005-03-02 浙江大学 Temperature compensation method for electric eddy shift sensor
CN103471641A (en) * 2013-09-03 2013-12-25 中国科学技术大学 Method for automatically correcting temperature drift of electrical vortex sensor
CN104729396A (en) * 2015-03-24 2015-06-24 浙江大学 High-temperature eddy-current displacement sensor temperature compensation method based on temperature online measurement and sensing device
CN204757913U (en) * 2015-03-24 2015-11-11 浙江大学 High temperature current vortex displacement sensing device based on temperature on line measurement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吕梁 ; 樊树江 ; 吴峻 ; .电涡流间隙传感器的温度补偿.传感器与微系统.2006,第25卷(第05期),37-41. *

Also Published As

Publication number Publication date
CN115218771A (en) 2022-10-21

Similar Documents

Publication Publication Date Title
CN115218771B (en) Temperature compensation method and system for eddy current displacement sensor of magnetic suspension blower
US10066631B2 (en) Direct power control for constant airflow control
Ganchev et al. Compensation of speed dependence in sensorless rotor temperature estimation for permanent-magnet synchronous motor
US9732976B2 (en) Direct power control for constant airflow control with advanced motor system modeling
CN111504360B (en) Time coordinate-based magnetoelectric encoder angle precision division method and device
Ge et al. An optimization-based initial position estimation method for switched reluctance machines
CN101876528B (en) Electromagnetic sensor-based metal film thickness measuring device and method
JPH0763829A (en) Load measuring apparatus
CN110531626B (en) Magnetic suspension rotor vibration compensation control method and system based on rolling time domain estimation
CN110673670B (en) Atomic gas chamber temperature closed-loop control method and device
CN110221101A (en) Low-frequency standard vibration platform based on overall-finished housing
Jiang et al. Multiparameter identification for active magnetic bearing with uncertainties based on a coupled nonlinear model
CN113804094B (en) Device and method for estimating elongation of rotor of magnetic suspension motor
CN108344494B (en) Low-frequency electromagnetic vibration table movement speed detection device based on induction coil
CN109802614B (en) Permanent magnet synchronous motor inductance parameter identification system and method
CN113028969B (en) Method and device for measuring rotor elongation
CN114483635A (en) Magnetic bearing system, compressor and air conditioner
CN114679114A (en) Real-time monitoring method for temperature of high-speed permanent magnet motor rotor
CN111679705B (en) Low-cost digital high-precision wavelength control circuit and method
Aarniovuori et al. Parallel chamber calorimetric concept
CN108645529B (en) Self-sensing temperature online monitoring system and method of piezoelectric device
CN109472054A (en) A kind of frequency-division section recognition methods of loudspeaker thermal parameters
CN109742990A (en) A kind of motor Flux Observation Method and system
CN106642516B (en) A kind of method and air-conditioning equipment detecting motor temperature
CN112821835B (en) Parameter determination method and device and air conditioner

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
GR01 Patent grant
GR01 Patent grant