CN113566887B - Suspension motor rotor suspension position, deflection angle and rotating speed integrated detection system and application - Google Patents
Suspension motor rotor suspension position, deflection angle and rotating speed integrated detection system and application Download PDFInfo
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- CN113566887B CN113566887B CN202110845398.9A CN202110845398A CN113566887B CN 113566887 B CN113566887 B CN 113566887B CN 202110845398 A CN202110845398 A CN 202110845398A CN 113566887 B CN113566887 B CN 113566887B
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Abstract
The invention relates to a suspension position, deflection angle and rotating speed integrated detection system of a suspension motor rotor and application thereof, belonging to the technical field of detection instruments. The system comprises a radial test piece, an eddy current sensor, a prepositive device and a processor, wherein the eddy current sensor is connected with the prepositive device, the prepositive device is connected with the processor, the prepositive device is used for supplying power to the eddy current sensor and detecting an analysis circuit, and the processor is used for processing the measurement result of the eddy current sensor. The technical problems of complex structure, poor detection precision of measuring position and rotating speed and low resolution of the rotor detection device in the prior art are solved.
Description
Technical Field
The invention relates to a suspension position, deflection angle and rotating speed integrated detection system of a suspension motor rotor and application thereof, belonging to the technical field of detection instruments.
Background
The suspension motor has the advantage of no mechanical friction, and is more beneficial to realizing high-speed and high-efficiency operation. The active suspension motor needs to perform real-time detection and closed-loop control on the radial suspension position and the rotation speed of the rotor when working stably and reliably (even if a control method without speed sensing is adopted, an external speed sensor is still needed for auxiliary verification in the algorithm debugging stage). At present, a capacitive sensor, an inductive sensor and an eddy current sensor are usually adopted for detecting radial vibration (position) of a rotor, and only x or y unidirectional vibration (orthogonal vibration and displacement are ignored) is usually detected, while an encoder, a rotary transformer, an eddy current sensor and other modes are usually adopted for speed detection, and a suspension position and a rotating speed are respectively detected by adopting discrete sensing devices, so that the installation size among the discrete sensors needs to be increased for avoiding mutual interference, which can lead to the increase of the axial size of a motor, and the reduction of the critical rotating speed and the stability at high speed.
The eddy current sensor has the advantages of strong measurement signal, wide dynamic response range, good reliability, wide temperature adaptation range and the like, and is commonly used for measuring non-contact positions of planes and cylindrical surfaces. The eddy current sensor is arranged along the radial direction of the rotor, so that the vibration of the radial position of the rotor can be directly detected, and the improved stepped gear disc is sleeved on the rotating shaft and rotates together with the rotating shaft, so that the rotating speed of the rotor can be detected by the eddy current sensor. However, there is no method for simultaneously detecting the radial position and the rotating speed, and for the suspension motor, because of the uncertainty of the suspension (eccentric) position of the rotor rotating shaft, it cannot be guaranteed that the sensor probe always faces the outer normal direction of the cylindrical surface of the rotating shaft to be detected, so that the displacement change in the direction orthogonal to the detection direction of the probe inevitably causes a large uncertain detection error to the detection direction, and the error will simultaneously affect the detection precision of the suspension position and the rotating speed, and particularly after the two are integrated, the following problems are more obvious:
1. the uncertain change of the suspension position causes the existence of the position eccentricity in the direction orthogonal to the direction to be detected, and influences the detection precision of the suspension position;
2. due to uncertain change of the suspension position, the position eccentricity in the direction orthogonal to the direction to be detected exists, the amplitude of a detection signal is influenced, the high and low voltage pulse counting errors of a processing circuit after the rotation speed detection are caused, and the accuracy of the rotation speed detection is influenced;
3. at high rotation speeds, the detection sensitivity is affected by the size and depth of the detection surface, resulting in poor sensitivity and low resolution.
In order to solve the problems, no better solution is provided at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an integrated detection system for the suspension position, the deflection angle and the rotating speed of a rotor of a suspension motor, which solves the technical problems of complex structure, poor detection precision of the measurement position and the rotating speed and low resolution of a rotor detection device in the prior art.
The invention also provides an application of the integrated detection system for the suspension position, the deflection angle and the rotating speed of the suspension motor rotor. The technical scheme of the invention is as follows:
the utility model provides a suspension electric motor rotor suspension position, deflection angle and rotational speed integration detecting system, includes radial test piece, eddy current sensor, leading ware and treater, and wherein, eddy current sensor is connected with leading ware, and leading ware is connected with the treater, and leading ware is used for the power supply of eddy current sensor and detects analytic circuit, and the treater is used for handling eddy current sensor's measuring result, eliminates the influence of rotor radial suspension position off-centre to the testing result precision.
Preferably, the radial test piece comprises an annular cylinder, the outer side of the annular cylinder is symmetrically provided with circular arc sections in a protruding mode, and the circular arc sections are concentric with the annular cylinder.
Further preferably, the arc segments are provided with at least 2 segments, and the more the segments are, the higher the frequency of the square wave signal obtained by rotating the rotor for one circle is, and the higher the test sensitivity is. To ensure dynamic balance and improve resolution, 2 stages are preferred.
Preferably, the radial test piece is made of a conductor material, namely hard aviation aluminum.
Preferably, the eddy current sensor is a high-frequency reflection type eddy current sensor, and the measuring range and the sensitivity can be selected according to different application occasions.
Preferably, the eddy current sensor is fixed to the suspension motor housing through the annular shell, and the eddy current sensor is connected to the annular shell and the suspension motor housing in a threaded penetrating manner.
Preferably, the prepositioner comprises an oscillator, a filter, a converter and a voltage stabilizer, the eddy current sensor is connected with the prepositioner and is calibrated and linearly compensated according to the material and the shape of the measured piece before use, and the prepositioner detects the equivalent inductance change of the coil in the probe caused by the position change of the measured piece and converts the equivalent inductance change into a corresponding voltage quantity. The voltage amounts are proportional to the changes in the distance between the surface to be measured and the probe, respectively.
Preferably, the processor comprises a difference circuit, a summation circuit and a pulse counter, and is used for processing the voltage signals output by the eddy current sensor and the corresponding pre-processor;
the differential circuit eliminates common mode interference signals, and the source of the voltage deviation detected by the probe is mainly because the probe is not aligned with the axis of the rotor rotating shaft, namely the position of the probe in the orthogonal direction is eccentric; for two probes in opposite directions, the eccentricity in the orthogonal direction is the same, so that the influence of the output voltage is the same when the probes test the displacement in the direction (namely, common-mode interference), and the voltage signals which represent the displacement in the direction and are collected by the two probes in the opposite directions are subtracted by adopting a differential circuit mode, so that the influence of the error, namely, the common-mode interference, can be eliminated;
the summation circuit eliminates the influence of the eccentricity of the rotor on the high and low voltages for the speed detection, and ensures that the voltage signal representing the displacement in the detection direction is kept unchanged when the rotor is deviated in the direction orthogonal to the detection direction.
The summing circuit outputs voltage to a pulse counter, the pulse counter is used for measuring speed, and the current motor rotating speed is obtained according to the number (frequency) of high-voltage pulses in unit time.
The application of the integrated detection system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor comprises the following operation steps:
(1) 4 eddy current sensors are arranged on a shell in a differential structure, two opposite eddy current sensors form a group, the 4 eddy current sensors are arranged at intervals of 90 degrees in a plane, the mounting directions of probes of the eddy current sensors are all directed to the center line of a rotor and used for detecting the displacement of the outer surface of a radial test piece, and the displacement of the radial test piece is the displacement of the rotor;
(2) the radial test piece is installed and fixed on the rotor shaft in an interference fit mode, so that the radial test piece rotates along with the rotor shaft;
(3) the suspension motor is started, the probe of the eddy current sensor collects the information of the outer surface of the rotor in the opposite direction, the rotor rotates, the shape of the outer surface of the rotor in the opposite direction is continuously changed by the probe, the probe collects a series of high and low voltage signals, and the displacement of the rotor in the opposite direction is continuously changed by the probe, so that the displacement measured by the two probes in the opposite direction is also continuously changed, and the displacement is irregular (the maximum and minimum values of the square waves are continuously changed, even not square waves), and the rotation speed detection cannot be directly carried out (as shown in figure 1, when the displacement with fixed size is determined in the measured direction and the orthogonal direction, the change condition of the signals detected by the two eddy current sensors in the opposite direction is changed). And voltage signals acquired by the eddy current sensors in opposite directions are added to obtain voltage signals with unchanged amplitude values, and the frequency counting is adopted for the voltage signals to obtain the rotating speed of the rotor.
Preferably, in the step (1), zero adjustment is performed when the eddy current sensor is installed, after the suspension motor is processed and assembled, the suspension motor is under the action of the gravity of the rotor in a static state, the rotor is not located at the radial circle center position, the radial test piece is fixed through the zero adjustment tool piece, the radial test piece is coaxial with the rotor, a probe of the eddy current sensor is calibrated in advance according to the material and the shape of the radial test piece to obtain a proportionality coefficient between the displacement and the voltage of the radial test piece, the displacement of the eddy current sensor in the direction can be obtained according to a voltage signal value obtained by a processor during measurement, and the current suspension position of the rotor can be determined according to the displacement;
then the initial position of the probe of the eddy current sensor is adjusted through threads, and when the output voltage of the front positioner is zero, zero adjustment is completed. And the zero adjustment of other eddy current sensors is completed in the same way.
Further preferably, zero-setting tool spare includes one end open-ended hollow cylinder, and hollow cylinder bottom central point puts and is provided with the cylinder, and the hollow cylinder internal diameter is the same with ring form casing external diameter for the circular form casing of fixed ring, cylinder diameter and rotor shaft diameter are the same, are fixed in the cylinder with radial test piece during the use, guarantee through zero-setting tool spare that the central point of radial test piece puts the same with the central point of during operation to this carries out eddy current sensor's zero adjustment.
Preferably, in the step (1), 4 eddy current sensors are respectively arranged at two ends of the rotor, the axial installation distance L of the eddy current sensors at the two ends is determined, the ratio of the displacement difference (y1-y2) measured by the eddy current sensors at the two ends corresponding to the direction to the axial installation distance L is the tangent value tan α of the deflection angle of the rotor in the direction, and the deflection angle α of the rotor can be obtained by calculating the arc tangent.
The invention has the beneficial effects that:
1. the design of the radial test piece does not influence the dynamic balance of the original rotor, simultaneously ensures that the detection result of the single probe is a square wave with the duty ratio of 0.5, provides convenience and a foundation for a subsequent processor to realize the detection of the radial suspension position and the rotating speed, and overcomes the technical problems of complex structure, poor detection precision of the measurement position and the rotating speed and low resolution of a rotor detection device in the prior art.
2. The four probes of the eddy current sensor are symmetrically arranged in 90 degrees in the same plane, so that mutual influence and interference among the probes are avoided.
3. The invention adopts the differential circuit to process the signals of the eddy current sensors in the opposite directions, eliminates the common-mode interference caused by the eccentricity in the orthogonal direction and improves the detection precision and the sensitivity of the radial suspension position.
4. The invention adopts the summing circuit to process the signals of the eddy current sensors in opposite directions, eliminates the problems of inconsistent high and low voltages and unobvious square wave signals caused by the eccentricity in the orthogonal direction, and improves the detection precision and sensitivity of the rotating speed.
5. The zero setting tool solves the problem that the initial zero position of the traditional suspension motor is difficult to adjust
Drawings
FIG. 1 is a graph of the output voltage of each part when there is displacement in the initial position and the measured direction.
FIG. 2 is a schematic diagram of the detection system of the present invention.
Fig. 3 is a diagram of the position arrangement of the eddy current sensor of the present invention.
Fig. 4 is a structural view of the zero setting tool of the present invention.
Fig. 5 is a diagram of the principle of the pre-processor and the signal flow of the present invention.
Fig. 6 is a schematic diagram of the internal oscillator + filter circuit of the pre-stage of the present invention.
Fig. 7 is a schematic diagram of the internal rectifying converter circuit of the pre-stage of the present invention.
Fig. 8 is a schematic diagram of a differential circuit of the present invention.
Fig. 9 is a schematic diagram of a summing circuit of the present invention.
Fig. 10 is a schematic diagram of the deflection angle calculation of the present invention.
Wherein: 1. a rotor; 2. a radial test piece; 3. an eddy current sensor; 4. a pre-positioning device; 5. a processor; 6. a probe; 7. a circular ring-shaped housing; 8. adjusting the parts of the tooling; 9. a circular arc segment.
Detailed Description
The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.
Example 1:
as shown in fig. 2-3, the present embodiment provides an integrated detection system for a suspension position, a deflection angle and a rotation speed of a rotor of a suspension motor, including a radial test piece 2, an eddy current sensor 3, a pre-processor 4 and a processor 5, wherein the eddy current sensor 3 is connected to the pre-processor 4, the pre-processor 4 is connected to the processor 5, the pre-processor 4 is used for supplying power to the eddy current sensor 3 and detecting an analysis circuit, and the processor 5 is used for processing a measurement result of the eddy current sensor and eliminating an influence of an eccentricity of the radial suspension position of the rotor on a precision of the detection result.
The radial test piece 2 comprises an annular cylinder, the outer side of the annular cylinder is symmetrically provided with circular arc sections 9 in a protruding mode, and the circular arc sections are concentric with the annular cylinder.
The circular arc section is provided with 2 sections at least, and the number of sections is more, and the square wave signal frequency that the rotor rotation a week obtained is higher, and test sensitivity is higher. To ensure dynamic balance and improve resolution, 2 stages are preferred.
The radial test piece 2 is made of a conductor material, namely hard aviation aluminum.
The eddy current sensor 3 is a high-frequency reflection type eddy current sensor, and the measuring range and the sensitivity can be selected according to different application occasions.
The eddy current sensor 3 is fixed on the suspension motor shell through the circular shell 7, and the eddy current sensor is in threaded penetration connection with the circular shell and the suspension motor shell.
The pre-set 4 comprises an oscillator, a filter, a converter and a voltage stabilizer, the pre-set is an existing device, the structure is shown in figure 5, the circuit connection is shown in figures 6-7, the electric eddy current sensors are connected with the pre-set, calibration and linear compensation are carried out on the materials and the shapes of the tested pieces before use, and the pre-set detects the equivalent inductance change of a coil in a probe caused by the position change of the tested pieces and converts the equivalent inductance change into a corresponding voltage quantity. The voltage amounts are proportional to the changes in the distance between the surface to be measured and the probe, respectively.
The processor 5 comprises a differential circuit, a summing circuit and a pulse counter, and is used for processing the voltage signals output by the eddy current sensor and the corresponding pre-stage, wherein the schematic diagram of the differential circuit is shown in FIG. 8, and the schematic diagram of the summing circuit is shown in FIG. 9;
the differential circuit eliminates common mode interference signals, and the source of the voltage deviation detected by the probe is mainly because the probe is not aligned with the axis of the rotor rotating shaft, namely the position of the probe in the orthogonal direction is eccentric; for two probes in opposite directions, the eccentricity in the orthogonal direction is the same, so that the influence of the output voltage is the same when the probes test the displacement in the direction (namely, common-mode interference), and the voltage signals which represent the displacement in the direction and are collected by the two probes in the opposite directions are subtracted by adopting a differential circuit mode, so that the influence of the error, namely, the common-mode interference, can be eliminated;
the suspension position of the rotor has uncertainty, the probe cannot be guaranteed to be always opposite to the outer normal direction of the measured rotor and is influenced by the eccentricity of the rotor, a voltage signal measured by the probe and the displacement of the outer surface of the rotor in the opposite direction of the probe are not in a linear relation under the opposite condition, the offset condition of the probe is continuously changed under the influence of the eccentric size, and as shown in figure 1, when the eddy current sensor directly detects the radial displacement, a large error exists. For two probes in opposite directions, the displacement in the probe directions is opposite, and the eccentric influence on the orthogonal direction is the same, so that the voltage data acquired by the two probes in the opposite direction are subtracted, the common-mode interference of the eccentricity in the orthogonal direction can be eliminated, and the sensitivity of the displacement detection in the opposite direction is improved.
The summation circuit eliminates the influence of the eccentricity of the rotor on the high and low voltages for the speed detection, and ensures that the voltage signal representing the displacement in the detection direction is kept unchanged when the rotor is deviated in the direction orthogonal to the detection direction.
The summing circuit outputs voltage to a pulse counter, the pulse counter is used for measuring speed, and the current motor rotating speed is obtained according to the number (frequency) of high-voltage pulses in unit time. If the number of high voltage pulses measured per second is N, the rotation speed N is 30N rpm.
The application of the integrated detection system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor comprises the following operation steps:
(1) 4 eddy current sensors are arranged on a shell in a differential structure, two opposite eddy current sensors form a group, the 4 eddy current sensors are arranged at intervals of 90 degrees in a plane, the mounting directions of probes 6 of the eddy current sensors are all directed to the central line of the rotor 1 and are used for detecting the displacement of the outer surface of a radial test piece, and the displacement of the radial test piece is the rotor displacement;
(2) the radial test piece is fixedly arranged on the rotor shaft in an interference fit mode, so that the radial test piece rotates along with the rotor shaft;
(3) the suspension motor is started, the probe of the eddy current sensor collects the information of the outer surface of the rotor in the opposite direction, the rotor rotates, the shape of the outer surface of the rotor in the opposite direction is constantly changed by the probe, the probe collects a series of high and low voltage signals, and the displacement of the rotor in the opposite direction is constantly changed by the probe, so that the displacement measured by the two probes in the opposite direction is also constantly changed, and the displacement is irregular (the maximum and minimum values of the square waves are constantly changed, or even not square waves), and the rotation speed cannot be directly detected (as shown in figure 1, when the displacement with fixed size is determined in the measured direction and the orthogonal direction, the change condition of the detected signals of the two eddy current sensors in the opposite direction is detected). And the voltage signals collected by the eddy current sensors in opposite directions are added to obtain a voltage signal with unchanged amplitude, and the frequency counting is adopted for the voltage signal to obtain the rotating speed of the rotor.
In the step (1), zero adjustment is carried out when the eddy current sensor is installed, after a suspension motor is machined and assembled, the suspension motor is under the action of the gravity of a rotor in a static state, the rotor is not positioned at the position of a radial circle center, a radial test piece is fixed by adjusting a zero tooling component 8, the radial test piece is coaxial with the rotor, a probe of the eddy current sensor is calibrated in advance aiming at the material and the shape of the radial test piece to obtain a proportionality coefficient between the displacement and the voltage of the radial test piece, the displacement of the eddy current sensor in the direction can be obtained according to a voltage signal value obtained by a processor during measurement, and the current suspension position of the rotor can be determined according to the displacement;
then the initial position of the probe of the eddy current sensor is adjusted through threads, and when the output voltage of the front positioner is zero, zero adjustment is completed. And the zero adjustment of other eddy current sensors is completed in the same way.
Example 2:
the utility model provides an application of suspension motor rotor suspension position, deflection angle and rotational speed integration detecting system, the operating procedure is as embodiment 1, the difference lies in, zero setting frock spare 8 includes one end open-ended hollow cylinder, hollow cylinder bottom central point puts and is provided with the cylinder, as shown in figure 4, the hollow cylinder internal diameter is the same with ring form casing external diameter, be used for fixed ring form casing, the cylinder diameter is the same with rotor shaft diameter, be fixed in the cylinder with radial test piece during the use, central point that guarantees radial test piece through zero setting frock spare puts and the central point of during operation is the same, carry out eddy current sensor's zero-position control with this.
Example 3:
an application of an integrated detection system for a suspension position, a deflection angle and a rotation speed of a rotor of a suspension motor is disclosed in embodiment 1, and is characterized in that in the step (1), 4 eddy current sensors are respectively arranged at two ends of the rotor, an axial installation distance L of the eddy current sensors at the two ends is determined, a ratio of a displacement difference (y1-y2) measured by the eddy current sensors at the two ends in corresponding directions to the axial installation distance L is a tangent value tan alpha of the deflection angle of the rotor in the direction, and an arc tangent is calculated to obtain the deflection angle alpha of the rotor, wherein a calculation schematic diagram is shown in fig. 10.
Claims (9)
1. The integrated detection system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor is characterized by comprising a radial test piece, an eddy current sensor, a pre-processor and a processor, wherein the eddy current sensor is connected with the pre-processor which is connected with the processor, the pre-processor is used for supplying power to the eddy current sensor and detecting an analytic circuit, and the processor is used for processing the measurement result of the eddy current sensor;
the suspension motor shell at two ends of the rotor is respectively provided with 4 eddy current sensors in a differential structure, the two opposite eddy current sensors form a group, the interval in the plane of the 4 eddy current sensors is 90 degrees, the axial installation distance of the eddy current sensors at two ends is L, the ratio of the displacement difference measured by the eddy current sensors at two ends in the corresponding direction to the axial installation distance is the tangent value tan alpha of the deflection angle of the rotor in the direction, and the deflection angle alpha of the rotor is obtained by arc tangent calculation;
the radial test piece comprises an annular cylinder, the outer side of the annular cylinder is symmetrically provided with circular arc sections in a protruding mode, and the circular arc sections are concentric with the annular cylinder;
the arc section is provided with at least 2 sections;
the processor comprises a difference circuit, a summation circuit and a pulse counter and is used for processing voltage signals output by the eddy current sensor and the corresponding prepositive device;
the differential circuit eliminates common mode interference signals;
the summation circuit eliminates the influence of the eccentricity of the rotor on the high and low voltage of the rotating speed detection, and ensures that a voltage signal representing the displacement of the detection direction is kept unchanged when the rotor is deviated in the orthogonal direction of the detection direction;
the summing circuit outputs voltage to a pulse counter, the pulse counter is used for measuring speed, and the current motor rotating speed is obtained according to the number of high-voltage pulses in unit time.
2. The integrated detecting system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor as claimed in claim 1, wherein the radial test piece is made of a conductor material, namely hard aviation aluminum.
3. The integrated detecting system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor as claimed in claim 1, wherein the eddy current sensor is a high-frequency reflection type eddy current sensor.
4. The integrated detecting system for the suspension position, the deflection angle and the rotating speed of the suspension motor rotor as claimed in claim 1, wherein the eddy current sensor is fixed on the suspension motor shell through an annular shell, and the eddy current sensor is in threaded through connection with the annular shell and the suspension motor shell.
5. The application of the integrated detection system for the suspension position, the deflection angle and the rotation speed of the rotor of the suspension motor as claimed in claim 4 is characterized in that the operation steps are as follows:
(1) 4 eddy current sensors are arranged on a shell in a differential structure, two opposite eddy current sensors form a group, the 4 eddy current sensors are arranged at intervals of 90 degrees in a plane, the mounting directions of probes of the eddy current sensors are all directed to the central axis of a rotor and are used for detecting the displacement of the outer surface of a radial test piece, and the displacement of the radial test piece is the rotor displacement;
(2) the radial test piece is fixedly arranged on the rotor shaft in an interference fit mode, so that the radial test piece rotates along with the rotor shaft;
(3) the suspension motor is started, the probe of the eddy current sensor acquires the information of the outer surface of the rotor in the opposite direction, the shape of the outer surface of the rotor in the opposite direction is constantly changed by the probe in the rotating process of the rotor, the probe acquires a series of high and low voltage signals, the voltage signals acquired by the eddy current sensors in the opposite direction are added to obtain a voltage signal with an unchanged amplitude value, and the frequency counting is adopted for the voltage signal to obtain the rotating speed of the rotor.
6. The application of the integrated detection system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor as claimed in claim 5, wherein in the step (1), zero adjustment is performed when the eddy current sensor is installed, after the suspension motor is processed and assembled, the suspension motor is statically subjected to the gravity action of the rotor, the rotor is not located at the radial circle center position, the radial test piece is fixed through a zero adjustment tool piece, so that the radial test piece is coaxial with the rotor, a probe of the eddy current sensor is calibrated in advance according to the material and the shape of the radial test piece, a proportional coefficient between the displacement and the voltage of the radial test piece is obtained, the displacement in the direction of the eddy current sensor can be obtained according to the voltage signal value obtained by the processor during measurement, and the current suspension position of the rotor can be determined according to the displacement;
then the initial position of the probe of the eddy current sensor is adjusted through threads, and when the output voltage of the front positioner is zero, zero adjustment is completed.
7. The application of the integrated detection system for the suspension position, the deflection angle and the rotating speed of the rotor of the suspension motor as claimed in claim 6, wherein the zero-setting tooling component comprises a hollow cylinder with an opening at one end, a cylinder is arranged at the central position of the bottom of the hollow cylinder, the inner diameter of the hollow cylinder is the same as the outer diameter of the annular shell, and the diameter of the cylinder is the same as the diameter of the shaft of the rotor.
8. The application of the system for integrally detecting the suspension position, the deflection angle and the rotation speed of the rotor of the suspension motor as claimed in claim 6, wherein in the step (1), 4 eddy current sensors are respectively arranged at two ends of the rotor, the axial installation distance L of the eddy current sensors at the two ends is determined, the ratio of the displacement difference measured by the eddy current sensors at the two ends corresponding to the direction to the axial installation distance is the tangent value tan α of the deflection angle of the rotor in the direction, and the deflection angle α of the rotor can be obtained by calculating the arc tangent.
9. The application of the system for integrally detecting the suspension position, the deflection angle and the rotation speed of the rotor of the suspension motor as claimed in claim 8, wherein in the step (3), for the two probes in opposite directions, the displacement in the probe directions is opposite, and the eccentric influence in the orthogonal direction is the same, so that the common mode interference of the eccentricity in the orthogonal direction can be eliminated by subtracting the displacement data acquired by the two probes in the opposite directions.
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| CN202110845398.9A CN113566887B (en) | 2021-07-26 | 2021-07-26 | Suspension motor rotor suspension position, deflection angle and rotating speed integrated detection system and application |
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| JPH1084652A (en) * | 1996-09-06 | 1998-03-31 | Ebara Corp | Non-bearing rotating machine |
| CN1800773A (en) * | 2006-01-25 | 2006-07-12 | 北京航空航天大学 | Radial/axial six-position integrated electric eddy transducer |
| CN107014406A (en) * | 2017-03-16 | 2017-08-04 | 北京航空航天大学 | A kind of autodyne fraction eddy current displacement sensor for magnetic levitation bearing system |
| CN107968540A (en) * | 2017-12-27 | 2018-04-27 | 北京信息科技大学 | Magnetic suspension brshless DC motor axial displacement and rotor-position integrated sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3919436B2 (en) * | 2000-09-13 | 2007-05-23 | 株式会社荏原製作所 | Magnetic levitation rotating machine |
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2021
- 2021-07-26 CN CN202110845398.9A patent/CN113566887B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1084652A (en) * | 1996-09-06 | 1998-03-31 | Ebara Corp | Non-bearing rotating machine |
| CN1800773A (en) * | 2006-01-25 | 2006-07-12 | 北京航空航天大学 | Radial/axial six-position integrated electric eddy transducer |
| CN107014406A (en) * | 2017-03-16 | 2017-08-04 | 北京航空航天大学 | A kind of autodyne fraction eddy current displacement sensor for magnetic levitation bearing system |
| CN107968540A (en) * | 2017-12-27 | 2018-04-27 | 北京信息科技大学 | Magnetic suspension brshless DC motor axial displacement and rotor-position integrated sensor |
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