CN115632533A - Permanent magnet synchronous motor magnetic variable real-time monitoring device and monitoring method - Google Patents
Permanent magnet synchronous motor magnetic variable real-time monitoring device and monitoring method Download PDFInfo
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- CN115632533A CN115632533A CN202211560134.XA CN202211560134A CN115632533A CN 115632533 A CN115632533 A CN 115632533A CN 202211560134 A CN202211560134 A CN 202211560134A CN 115632533 A CN115632533 A CN 115632533A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/10—Plotting field distribution ; Measuring field distribution
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/27—Devices for sensing current, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a real-time monitoring device for magnetic variables of a permanent magnet synchronous motor, which comprises a motor shell, wherein a stator core is arranged on the inner wall of the motor shell, a stator three-phase winding is uniformly wound on the stator core, a rotating shaft is movably arranged on the inner wall of the motor shell through a bearing, a rotor is sleeved outside the rotating shaft, an angle sensor is arranged at one end of the rotating shaft, a junction box is fixedly arranged on the outer wall of the motor shell through welding, the stator core is divided into two parts from the middle part, a movable iron core block is arranged between the two parts of the stator core in a sliding manner, a hollow moving block is fixedly arranged on one side of the movable iron core block through welding, a sliding guide column is arranged on the inner wall of the hollow moving block in a sliding and inserting manner, an installation block is arranged at one end of the sliding guide column, and the installation block is fixed on the inner wall of the motor shell through welding.
Description
Technical Field
The invention belongs to the technical field of permanent magnet motors, and particularly relates to a device and a method for monitoring magnetic variables of a permanent magnet synchronous motor in real time.
Background
The starting and running of the permanent magnet synchronous motor are formed by the interaction of magnetic fields generated by a stator winding, a rotor cage winding and a permanent magnet. When the motor is static, three-phase symmetrical current is introduced into the stator winding to generate a stator rotating magnetic field, the stator rotating magnetic field generates current in the cage winding relative to the rotation of the rotor to form a rotor rotating magnetic field, and the asynchronous torque generated by the interaction of the stator rotating magnetic field and the rotor rotating magnetic field enables the rotor to accelerate from the static state.
In unstable environments such as high temperature and high pressure, the rotor of the permanent magnet motor needs to be monitored in real time for magnetic variables, so that the rotor is prevented from being in loss-of-magnetic operation or partial loss-of-magnetic operation, the motor is unstable in operation, and production accidents are prevented.
When the magnetic variable of the rotor is detected by the conventional permanent magnet motor, the magnetic variable sensor is independently arranged for detecting, when the magnetic sectioning surface of the whole rotor is detected by the mode, the whole magnetic sectioning surface is subjected to fitting treatment by recording the magnetic field on the rotor with a certain point rotating circle, the magnetic sectioning surface of the whole rotor cannot be detected at the same time, and the test process has limitation and poor practicability. This phenomenon becomes an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to solve the problems in the background technology by aiming at the existing material collecting device, namely a permanent magnet synchronous motor magnetic variable real-time monitoring device and a monitoring method.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a permanent magnet synchronous motor magnetic variable real-time supervision device, includes motor housing, motor housing's inner wall is installed stator core, evenly the winding is provided with stator three-phase winding on the stator core, motor housing's inner wall has the pivot through bearing movable mounting, the rotor has been cup jointed to the outside of pivot, the one end of pivot is provided with angle sensor, motor housing's outer wall has the terminal box through welded fastening.
The invention further discloses that the stator core is divided into two parts from the middle part, and the movable core blocks are arranged between the two parts of the stator core in a sliding mode.
The invention further discloses that a hollow moving block is fixed on one side of the movable iron core block through welding, a sliding guide column is arranged on the inner wall of the hollow moving block in a sliding insertion mode, an installation block is installed at one end of the sliding guide column, and the installation block is fixed on the inner wall of the motor shell through welding.
The invention further discloses that a resistance card is fixed on the outer wall of the sliding guide column correspondingly through welding, a conductive block is sleeved on the outer wall of the sliding guide column in a sliding mode, the inner wall of the conductive block is in contact with the resistance card to form an electrifying loop, one end of each of the two conductive blocks is connected with a wire, a power supply is electrically connected between the two wires and is arranged in a junction box, a current sensor is electrically connected between the power supply and the resistance card, and one side of the conductive block is fixed with the hollow moving block through welding.
The invention further discloses that a spring is connected between the mounting block and the hollow moving block, and the spring is movably sleeved outside the sliding guide column.
A monitoring method of a permanent magnet synchronous motor magnetic variable real-time monitoring device adopts a system comprising a magnetic variable drawing module, a coordinate system establishing module, an electromagnetic force calculating module, an elastic force calculating module and a displacement calculating module, wherein a current sensor is electrically connected with the displacement calculating module, the displacement calculating module is electrically connected with the elastic force calculating module, the elastic force calculating module is electrically connected with the electromagnetic force calculating module, the displacement calculating module is electrically connected with the coordinate system establishing module, and the magnetic variable drawing module is electrically connected with the coordinate system establishing module and the electromagnetic force calculating module;
the magnetic variable drawing module is used for drawing a magnetic variable section diagram according to the electromagnetic force measured by each measuring point, the coordinate system establishing module is used for establishing coordinate points according to the circumferential distribution position of each movable core block, the electromagnetic force calculating module is used for estimating the electromagnetic force according to the radial position of each movable core block and the elastic force of the spring, the elastic force calculating module is used for calculating the elastic force according to the compression amount of the spring, and the displacement calculating module is used for calculating the displacement of each movable core block according to the indication number of the current sensor.
The invention further discloses a method which comprises the following specific steps:
s1, when magnetic variables are monitored in real time, a power supply of a motor is started to electrify the power supply, meanwhile, a rotor normally rotates, a permanent magnet pole in the rotor generates a magnetic field, the magnetic field rotates along with the rotation of the rotor, and a stator iron core also generates an armature magnetic field;
s2, the resultant magnetic field generated by the rotor and the stator iron core can generate magnetic attraction or repulsion action on the movable iron core blocks, and each movable iron core block is outwardly repelled or inwardly attracted to form tiny displacement;
s3, the resistor disc and the conductive block form a power-on loop when the power supply is powered on, the conductive block is driven to move when the movable iron core block is displaced, and then the resistance of the resistor disc connected to the power-on loop is changed, and the current detected by the current sensor is influenced;
s4, drawing a magnetic variable dissection diagram according to the current of the current sensor corresponding to the movable iron core blocks distributed circumferentially to obtain an intuitive rotor dynamic magnetic variable distribution diagram;
and S5, when the motor is stopped, only the magnetic pole magnetic field generated by the magnetic pole inside the rotor can reach the static magnetic field distribution diagram according to the current of the current sensor corresponding to the movable iron core block.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the magnetic variable dissection diagram around the inner rotor in the whole circumference at a certain moment can be obtained, and the dynamic magnetic variable distribution diagram at all moments can be obtained by taking a plurality of time segmentation point positions, so that the measurement mode can simultaneously avoid the problem of poor measurement effect caused by insensitive magnetic probes of the magnetic variable sensor due to a high-temperature environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the installation of the movable permanent magnet and the stator core of the present invention;
FIG. 3 is a schematic view of the hollow moving block of the present invention installed;
FIG. 4 is a schematic view of the hollow moving block and the sliding guide post of the present invention;
FIG. 5 is a schematic diagram of the circuit of the present invention;
FIG. 6 is a magnetic variable cutaway view of the present invention;
FIG. 7 is a block schematic of the present invention;
in the figure: 1. a motor housing; 5. a stator core; 4. a junction box; 6. a stator three-phase winding; 7. a rotor; 71. a rotating shaft; 72. an angle sensor; 241. a movable iron core block; 24. a hollow moving block; 242. a conductive block; 243. mounting blocks; 244. a sliding guide post; 245. a spring; 246. resistance cards; 247. a power source; 248. a current sensor; 99. a vibration sensor.
Detailed Description
The following detailed description of the present invention, taken in conjunction with the preferred embodiments and the accompanying drawings, further illustrates the present invention without limitation. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the 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.
Referring to fig. 1 to 7, the present invention provides a technical solution: a permanent magnet synchronous motor magnetic variable real-time monitoring device comprises a motor shell 1, wherein a stator core 5 is installed on the inner wall of the motor shell 1, a stator three-phase winding 6 is uniformly wound on the stator core 5, a rotating shaft 71 is movably installed on the inner wall of the motor shell 1 through a bearing, a rotor 7 is sleeved outside the rotating shaft 71, an angle sensor 72 is arranged at one end of the rotating shaft 71, a junction box 4 is fixedly installed on the outer wall of the motor shell 1 through welding, when a motor works, firstly, the stator three-phase winding 6 is electrified, the rotor 7 starts to rotate through the starting principle of a permanent magnet motor, and the current angle of the rotor 7 is detected through the angle sensor 72;
the stator core 5 is divided into two parts from the middle part, the movable core blocks 241 are arranged between the two parts of the stator core 5 in a sliding mode, inward attraction or outward repulsion can be carried out according to the current magnetic field direction between the rotor 7 and the stator core 5 through the movable core blocks 241, and therefore position adjustment can be visually carried out according to the current magnetic field direction;
a hollow moving block 24 is fixed on one side of the movable iron core block 241 through welding, a sliding guide column 244 is arranged on the inner wall of the hollow moving block 24 in a sliding insertion mode, an installation block 243 is installed at one end of the sliding guide column 244, the installation block 243 is fixed on the inner wall of the motor shell 1 through welding, an annular groove is formed in the inner wall of the motor shell 1, the installation block 243 is located in the annular groove, a part of the sliding guide column 244 is also located in the annular groove, the hollow moving block 24 can be driven to move when the position of the movable iron core block 241 is adjusted, so that the depth of the sliding guide column 244 extending into the hollow moving block 24 is changed, the movable iron core blocks 241 distributed on the whole circumference can more finely display the magnetic field change in the current circumference range, and the annular groove is used for enabling related measuring parts not to occupy the positions of internal parts of the motor;
as shown in fig. 3-4, a resistive sheet 246 is fixed on the outer wall of the sliding guide post 244 by welding, a conductive block 242 is sleeved on the outer wall of the sliding guide post 244 in a sliding manner, the inner wall of the conductive block 242 contacts with the resistive sheet 246 to form an energizing loop, one end of each of the two conductive blocks 242 is connected with a wire, a power supply 247 is electrically connected between the two wires, the power supply 247 is arranged in the junction box 4, a current sensor 248 is electrically connected between the power supply 247 and the resistive sheet 246, one side of the conductive block 242 is fixed with the hollow moving block 24 by welding, when the moving iron block 241 slides on the sliding guide post 244, since the resistance of the conductive block 242 is very small, the moving iron block can be regarded as a wire approximately, the resistance value of the resistive sheet 246 can be changed, and the position of the moving iron block 241 can be visually reflected;
a spring 245 is connected between the mounting block 243 and the hollow moving block 24, the spring 245 is movably sleeved outside the sliding guide post 244, when the movable iron core block 241 is not subjected to magnetic force, the spring 245 can be in a normal state, when the movable iron core block 241 is subjected to outward magnetic force, the spring 245 can be compressed, when the movable iron core block 241 is subjected to inward magnetic force, the spring 245 can be stretched, the stretching or compressing position of the spring 245 is converted into the current magnetic field intensity when a certain point of the rotor 7 is aligned with the movable iron core block 241, the greater the stretching degree is, the greater the inward magnetic field intensity is, the greater the compressing degree is, and the greater the outward magnetic field intensity is;
referring to fig. 7, a monitoring method of a permanent magnet synchronous motor magnetic variable real-time monitoring device adopts a system including a magnetic variable drawing module, a coordinate system establishing module, an electromagnetic force calculating module, an elastic force calculating module and a displacement calculating module, wherein a current sensor 248 is electrically connected with the displacement calculating module, the displacement calculating module is electrically connected with the elastic force calculating module, the elastic force calculating module is electrically connected with the electromagnetic force calculating module, the displacement calculating module is electrically connected with the coordinate system establishing module, and the magnetic variable drawing module is electrically connected with the coordinate system establishing module and the electromagnetic force calculating module;
the magnetic variable drawing module is used for drawing a magnetic variable sectioning graph according to the electromagnetic force measured by each measuring point, the coordinate system establishing module is used for establishing coordinate points according to the circumferential distribution position of each movable core block 241, the electromagnetic force calculating module is used for estimating the electromagnetic force according to the radial position of each movable core block 241 and the elastic force of the spring, the elastic force calculating module is used for calculating the elastic force according to the compression amount of the spring 245, the displacement calculating module is used for calculating the displacement of each movable core block 241 according to the indication of the current sensor 248, the conversion from the current to the displacement and then to the elastic force can be realized through the modules, the measuring mode is not to directly use the magnetic variable sensor for detection, but to use the current for conversion for detection, and the problem that the magnetic variable sensor is inaccurate in measurement due to the change of the probe sensitivity at high temperature is avoided;
the method comprises the following specific steps:
s1, when the magnetic variable is monitored in real time, a power supply of a motor is started, so that a power supply 247 is electrified, meanwhile, a rotor 7 rotates normally, a permanent magnet pole inside the rotor 7 generates a magnetic field, the magnetic field rotates along with the rotation of the rotor 7, and an armature magnetic field can also be generated by a stator iron core 5;
s2, the combined magnetic field generated by the rotor 7 and the stator core 5 can generate magnetic attraction or repulsion action on the movable iron core blocks 241, and each movable iron core block 241 is repelled outwards or attracted inwards to form tiny displacement;
s3, when the power supply 247 is powered on, the resistive sheet 246 and the conductive block 242 form a power-on loop, and when the movable core block 241 displaces, the conductive block 242 is driven to move, so that the resistance of the power-on loop connected to the resistive sheet 246 is changed, and the current detected by the current sensor 248 is influenced;
s4, drawing a magnetic variable profile according to the current of the current sensor 248 corresponding to the movable iron core blocks 241 distributed circumferentially to obtain an intuitive rotor 71 dynamic magnetic variable distribution map;
s5, when the motor is stopped, only the magnetic pole magnetic field generated by the magnetic pole inside the rotor 7 can reach a static magnetic field distribution diagram according to the current of the current sensor 248 corresponding to the movable iron core block 241, by the method, a magnetic variable section diagram around the rotor 7 in the whole circumference at a certain moment can be obtained, and by taking a plurality of time division point positions, and a dynamic magnetic variable distribution diagram at all moments can be obtained.
Example 1: when the magnetic variable change of a certain point of the rotor 7 along with time needs to be measured, firstly, the angle sensor 72 is utilized to detect the angle value of the point, assuming that the initial value is α, and at the same time, the indication value of the current sensor 248 corresponding to the movable core block 241 with the angle value of α is also recorded, and is converted into the current magnetic field strength, when the rotor 7 of the motor rotates to α + β, the current change limit value of all the movable core blocks 241 within the angle range from α to β just in the time period is the current change limit value, namely the magnetic field strength when the point of the rotor 7 is aligned with the certain movable core block 241 at the time.
Example 2: the vibration sensor 99 is arranged at the top of the rotating shaft 71, the vibration sensor 99 is used for detecting the vibration amplitude of the rotating shaft 71, when the vibration amplitude exceeds a set value, the disturbance on the magnetic variable drawing module exceeds a preset value, the magnetic variable drawing is not suitable at the moment, and the drawing accuracy is convenient to improve.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Finally, it should be pointed out 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: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions may be made in some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a permanent magnet synchronous motor magnetic variable real-time supervision device, includes motor housing (1), its characterized in that: stator core (5) are installed to the inner wall of motor housing (1), stator core (5) are gone up even winding and are provided with stator three-phase winding (6), the inner wall of motor housing (1) has pivot (71) through bearing movable mounting, rotor (7) have been cup jointed to the outside of pivot (71), the one end of pivot (71) is provided with angle sensor (72), the outer wall of motor housing (1) passes through welded fastening and installs terminal box (4).
2. The permanent magnet synchronous motor magnetic variable real-time monitoring device according to claim 1, characterized in that: the stator core (5) is divided into two parts from the middle part, and a movable core block (241) is arranged between the two parts of the stator core (5) in a sliding mode.
3. The permanent magnet synchronous motor magnetic variable real-time monitoring device according to claim 2, characterized in that: a hollow moving block (24) is fixed to one side of the movable iron core block (241) through welding, a sliding guide column (244) is arranged on the inner wall of the hollow moving block (24) in a sliding insertion mode, an installation block (243) is installed at one end of the sliding guide column (244), and the installation block (243) is fixed to the inner wall of the motor shell (1) through welding.
4. The permanent magnet synchronous motor magnetic variable real-time monitoring device according to claim 3, characterized in that: the outer wall of the sliding guide column (244) is correspondingly fixed with a resistor disc (246) through welding, the outer wall of the sliding guide column (244) is sleeved with a conductive block (242) in a sliding mode, the inner wall of the conductive block (242) is in contact with the resistor disc (246) to form an electrifying loop, one end of each of the two conductive blocks (242) is connected with a lead, a power supply (247) is electrically connected between the two leads, the power supply (247) is arranged in the junction box (4), a current sensor (248) is electrically connected between the power supply (247) and the resistor disc (246), and one side of the conductive block (242) is fixed with the hollow moving block (24) through welding.
5. The permanent magnet synchronous motor magnetic variable real-time monitoring device according to claim 4, characterized in that: a spring (245) is connected between the mounting block (243) and the hollow moving block (24), and the spring (245) is movably sleeved outside the sliding guide column (244).
6. A monitoring method of a permanent magnet synchronous motor magnetic variable real-time monitoring device is characterized in that: the system adopted by the method comprises a magnetic variable drawing module, a coordinate system establishing module, an electromagnetic force calculating module, an elastic force calculating module and a displacement calculating module, wherein a current sensor (248) is electrically connected with the displacement calculating module, the displacement calculating module is electrically connected with the elastic force calculating module, the elastic force calculating module is electrically connected with the electromagnetic force calculating module, the displacement calculating module is electrically connected with the coordinate system establishing module, and the magnetic variable drawing module is electrically connected with the coordinate system establishing module and the electromagnetic force calculating module;
the magnetic variable drawing module is used for drawing a magnetic variable sectioning graph according to electromagnetic force measured by each measuring point, the coordinate system establishing module is used for establishing coordinate points according to circumferential distribution positions of each movable core block (241), the electromagnetic force calculating module is used for estimating the electromagnetic force according to the radial position of each movable core block (241) and spring elastic force, the elastic force calculating module is used for calculating the elastic force according to the compression amount of the spring (245), and the displacement calculating module is used for calculating the displacement of each movable core block (241) according to the indication number of the current sensor (248).
7. The monitoring method of the permanent magnet synchronous motor magnetic variable real-time monitoring device according to claim 6, characterized in that: the method comprises the following specific steps:
s1, when magnetic variables are monitored in real time, a power supply of a motor is started, so that the power supply (247) is electrified, meanwhile, a rotor (7) normally rotates, permanent magnetic poles in the rotor (7) generate a magnetic field, the magnetic field rotates along with the rotation of the rotor (7), and an armature magnetic field can also be generated by a stator iron core (5);
s2, the combined magnetic field generated by the rotor (7) and the stator core (5) can generate magnetic attraction or repulsion action on the movable iron core blocks (241), and each movable iron core block (241) is repelled outwards or attracted inwards to form tiny displacement;
s3, the resistor disc (246) and the conductive block (242) form an electrifying loop when the power supply (247) is electrified, the conductive block (242) is driven to move when the movable core block (241) displaces, the resistance of the electrifying loop connected to the resistor disc (246) is changed, and the current detected by the current sensor (248) is influenced;
s4, drawing a magnetic variable dissection diagram according to the current of the current sensor (248) corresponding to the movable iron core blocks (241) which are distributed circumferentially to obtain an intuitive rotor (71) dynamic magnetic variable distribution diagram;
and S5, when the motor is stopped, only the magnetic pole magnetic field generated by the magnetic pole inside the rotor (7) can reach a static magnetic field distribution diagram according to the current of the current sensor (248) corresponding to the movable iron core block (241).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116337443A (en) * | 2023-05-31 | 2023-06-27 | 苏州百狮腾电气有限公司 | Permanent magnet motor mechanical property testing device |
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| CN115632533B (en) | 2023-04-14 |
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