CN113156312B - High-power linear electric motor dynamic behavior testing arrangement of adjustable structure - Google Patents
High-power linear electric motor dynamic behavior testing arrangement of adjustable structure Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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Abstract
The invention discloses a structure-adjustable dynamic performance testing device for a high-power linear motor, which comprises a transmission mechanism, an H-shaped sliding frame, a linear motor and a measurement control system, wherein the transmission mechanism is connected with the H-shaped sliding frame; the transmission mechanism is composed of a linear guide rail, a guide rail base, a traction end and a fixed end, wherein the linear guide rail is arranged on two sides of the guide rail base, the traction end and the fixed end are respectively fixed on two ends of the guide rail base, the traction end is provided with a traction motor, a traction wheel, an auxiliary motor and an auxiliary wheel, and the fixed end is provided with a driven wheel. The linear motor comprises a linear motor primary and a linear motor secondary, and the long primary is formed by splicing primary units. The H-shaped sliding frame is fixed on the linear guide rail in a sliding manner, and a synchronous chain, a traction wheel, an auxiliary wheel and a driven wheel form a traction loop. A vertical displacement sliding table, a transverse displacement sliding table, a three-axis force sensor group and a linear motor secondary level are sequentially arranged under the center of the H-shaped sliding frame, a linear motor primary unit is laid along the center of the guide rail base, and a position detector is arranged between the primary units. The invention realizes the dynamic performance test of linear motors with different structural types, thereby expanding the range of test objects.
Description
Technical Field
The invention relates to the field of dynamic performance testing of high-power linear motors, in particular to a dynamic performance testing device of a high-power linear motor with an adjustable structure.
Background
Compared with a rotating motor, the linear motor overcomes the constraint brought by a transmission machine, has the advantages of simple structure, no mechanical contact, high positioning precision, high running speed and the like, and has important application in the fields of industrial manufacturing, transportation, military industry, aerospace and the like. Compared with foreign countries, the application research of the domestic linear motor is started late, and early related research units are concentrated in colleges and scientific research institutions, mainly including units such as Zhejiang university, Chinese academy of electrical engineering, southwest university of transportation, and naval engineering university. In recent years, linear motors are practically applied to precise machine tools, subways, light rails, maglev trains, electromagnetic guns and aircraft carrier electromagnetic ejection systems, so that application and research of the linear motors are particularly important and urgent, and how to improve the thrust, speed and control precision of the linear motors becomes a main research and development trend of the linear motors.
The main research methods of the linear motor include three types: 1) resolving an electromagnetic theory; 2) finite element simulation; 3) according to experimental tests, due to the specific longitudinal and transverse end effects of the linear motor, the theoretical analysis method of the linear motor is different from that of a conventional rotating motor, so that the classical field method cannot be directly applied to accurate analysis; the finite element method has certain advantages in the analog calculation of the linear motor, but has the defects of long calculation time, high requirement on hardware equipment and the like in the simulation of complex structures and dynamic performance; the performance condition of the linear motor can be directly and reliably fed back through experimental tests. Therefore, designing and building a comprehensive measuring device suitable for testing the performance of the linear motor become the key of application research of the linear motor. The linear motor performance experiment testing device mainly comprises a disc-shaped experiment table and a linear track circuit, wherein the basic structure of the disc-shaped experiment table is shown in figure 10, the linear motor performance experiment testing device indirectly simulates linear motion by adopting rotary motion, but cannot simulate the actual working condition of the linear motor during motion; based on a linear track circuit, Beijing university of transportation proposes a mutual feed test system based on coupling of two linear motors, and a patent (CN 110160696A, CN 202110019U) adopts mutual feed to measure thrust and thrust fluctuation of the linear motors, but the measurement result is superposition of the thrust and the thrust fluctuation of the two motors, thereby reducing the measurement precision. In the measurement of the positioning force and the load of the linear motor, the patent (CN 101520348A, CN 101520353 a) adopts two pulleys and a synchronous belt to realize the continuous measurement of the positioning force and the load, however, the structure of the linear motor to be measured is fixed, and only the mechanical characteristics of the linear motor with low power on a fixed slide rail along the horizontal movement direction can be measured, and meanwhile, the torque fluctuation of the stepping motor can also bring certain influence to the measurement result. In addition, the patent (CN 107314851A, CN 101769802 a) adopts ball screw transmission to realize measurement of positioning force, thrust and thrust fluctuation of a linear motor, and also has the disadvantages of fixed structure of the motor to be measured, single measurement function, limited running speed and the like. Aiming at the performance measurement of a high-power and high-thrust linear motor, a patent (CN 110243524A) provides a high-temperature superconducting linear motor triaxial force testing device, but the device can only test the static performance of the linear motor.
Disclosure of Invention
The invention aims to overcome the defects of the existing linear motor performance testing device in aspects of nonadjustable structure, single measuring function, lack of a dynamic performance testing device of a high-power linear motor and the like, provides a dynamic performance testing device of a high-power linear motor with an adjustable structure, integrates the advantages of the existing testing device, and realizes comprehensive and effective testing of the dynamic and static performances of the linear motor. And testing the continuous positioning force, the horizontal thrust force, the normal force, the transverse force and the like under the dynamic running of the linear motor under the condition of adjusting the primary and secondary structures, the electromagnetic air gap and the slip ratio of the motor.
The technical scheme adopted by the invention is as follows:
a structure-adjustable dynamic performance testing device for a high-power linear motor comprises a measurement control system, a transmission mechanism, the linear motor and an H-shaped sliding frame; the linear motor comprises a linear motor primary level and a linear motor secondary level, the transmission mechanism comprises a linear guide rail, a guide rail base, a traction end and a fixed end, the linear guide rail is arranged on two sides of the upper end of the guide rail base, an 'H' -shaped sliding frame is arranged on the linear guide rail in a sliding mode, the traction end and the fixed end are respectively fixed at two ends of the guide rail base, the traction end is provided with a traction wheel, the fixed end is provided with a driven wheel, one end of a synchronous chain is connected with one side of the 'H' -shaped sliding frame, the other end of the synchronous chain is sequentially wound on the traction wheel and the driven wheel and then connected with the other side of the 'H' -shaped sliding frame, and the traction wheel is driven by the traction motor to indirectly control the slip ratio and the load in the dynamic running process of the linear motor;
the bottom surface of a middle connecting rod of the H-shaped sliding frame is provided with a vertical displacement sliding table, the upper end of the vertical displacement sliding table penetrates through the H-shaped sliding frame and moves in the vertical direction relative to the H-shaped sliding frame, the lower end of the vertical displacement sliding table is provided with a transverse sliding groove, a transverse displacement sliding table is arranged in the transverse sliding groove in a relatively sliding manner, the bottom surface of the transverse displacement sliding table is provided with a three-axis force sensor group, a linear motor secondary is arranged on the bottom surface of the three-axis force sensor group, a linear motor primary unit is laid in the center of the length direction of the guide rail base, and the linear motor primary is formed by splicing a plurality of primary units; the guide rail base is provided with position detectors at equal intervals along one primary side of the linear motor, the measurement control system is respectively connected with the position detectors and the traction motor, and the measurement control system respectively controls the position detectors and the traction motor to act.
Furthermore, as a preferred embodiment, the traction end is further provided with an auxiliary motor and an auxiliary wheel driven by the auxiliary motor, the other end of the synchronous chain is sequentially wound around the traction wheel, the auxiliary wheel and the driven wheel and then connected with the other side of the H-shaped sliding frame, the measurement control system is connected with and drives the auxiliary motor, the auxiliary motor inhibits the torque fluctuation of the traction motor, and the dynamic test error is reduced.
Furthermore, as a preferred embodiment, in order to improve the strength and reliability of the transmission mechanism, the number of the traction circuits formed by the synchronous chains, the traction wheels, the auxiliary wheels and the driven wheels is two or more, and the two or more traction circuits are arranged in parallel, so that the stability and the safety of the dynamic performance test of the high-power linear motor can be ensured.
Further, as a preferable embodiment, four ends of the bottom surface of the "H" shaped sliding frame are provided with sliding blocks, and the "H" shaped sliding frame is integrally arranged on the linear guide rail in a sliding manner through the sliding blocks.
Further, as a preferred embodiment, the slide block is one or a combination of two or more structures of a mechanical linear bearing, an air-floating linear bearing, a high-temperature superconducting magnetic levitation Dewar, a superconducting magnet, an electromagnet and a permanent magnet.
Further, as a preferred embodiment, two side edges of the primary unit of the linear motor are connected with an "L" shaped corner code and fixed on the guide rail base through the "L" shaped corner code, the "L" shaped corner code is provided with a "patch" shaped groove corresponding to the primary unit, the primary unit is adjustably and fixedly connected with the "patch" shaped groove through a bolt, the guide rail base is provided with a transverse strip-shaped groove corresponding to the bottom of the "L" shaped corner code, and the "L" shaped corner code is adjustably and fixedly connected with the strip-shaped groove through a bolt.
On one hand, the vertical position and the transverse position of the secondary stage of the linear motor are controlled through the vertical displacement sliding table and the transverse displacement sliding table, so that the electromagnetic air gap and the transverse offset of the linear motor can be indirectly changed in the test process;
on the other hand, the primary unit moves longitudinally along the vertical direction and the horizontal direction through the 'strap' shaped groove, thereby realizing the arrangement of the vertical step and the longitudinal gap of the primary unit; similarly, the primary unit horizontally moves through the strip-shaped groove on the guide rail base, so that the transverse dislocation arrangement of the primary unit is realized, and the stacking thickness of the primary iron core is changed. Various spatial positional relationships between the primary units may be set, for example: longitudinal gaps, transverse dislocation, vertical steps and the like. The dynamic test device is used for simulating the assembly error of the linear motor and the dynamic test under the actual operation condition.
By changing the fixed positions of the primary and the secondary of the linear motor and changing the structural form of the linear motor, the dynamic performance measurement of a single-side primary linear induction (synchronous) motor, a single-side short primary linear induction (synchronous) motor, a double-side long primary linear induction (synchronous) motor, a double-side short primary linear induction (synchronous) motor, a long primary cylindrical linear induction (synchronous) motor and a short primary cylindrical linear induction (synchronous) motor can be realized, so that the range of a test object is expanded, and the capital investment for equipment construction is reduced.
Further, as a preferred embodiment, the triaxial force sensor group is composed of a plurality of triaxial force sensor units uniformly distributed along the longitudinal direction and the transverse direction. On one hand, the normal force, the transverse force and the thrust force of the linear motor at different positions can be synchronously measured, and the test precision is improved; on the other hand, the connecting structure strength between the H-shaped sliding frame and the secondary stage of the linear motor is ensured.
Further, as a preferred embodiment, the linear guide rail is one or a combination of more than two structures of a mechanical guide rail, an air-float guide rail, a permanent-magnet guide rail and an electromagnetic suspension guide rail; the linear motor is a single-side long primary linear induction (synchronous) motor, a single-side short primary linear induction (synchronous) motor, a double-side long primary linear induction (synchronous) motor, a double-side short primary linear induction (synchronous) motor, a long primary cylindrical linear induction (synchronous) motor or a short primary cylindrical linear induction (synchronous) motor.
Further, as a preferred embodiment, the position detector is a reflection-type photoelectric switch, and a reflection plate matched with the position detector is arranged on the bottom surface of the H-shaped sliding frame so as to detect the running position of the secondary stage of the linear motor in real time.
Further, as a preferred embodiment, the system further comprises a power supply control system, the power supply control system comprises a weak current control circuit and a strong current control circuit, the primary unit is connected to the three-phase power bus through the ac contactor, the relay is used for controlling the on and off of the ac contactor, the relay is connected to the weak current control circuit, and the three-phase ac contact is connected to the strong current control circuit, so that the control of the weak current on the strong current is realized.
The specific segmented power supply control process is as follows: when the secondary of the linear motor runs to the primary unit, the photoelectric switch at the position outputs a high level or a low level to the controller, the controller outputs a control signal to the relay to control the primary unit covered by the secondary of the linear motor and the previous and next primary sections of the primary unit to be connected to the three-phase power bus, and other primary sections are disconnected, so that the sectional parallel power supply control of the long primary is realized.
By adopting the technical scheme, the slip ratio, the load and the like of the linear motor can be controlled in the dynamic test process of the linear motor; the torque fluctuation of the traction motor is inhibited, and the dynamic test error is reduced; by changing the electromagnetic air gap, the transverse offset and the space position among the primary units of the linear motor, the assembly error of the linear motor and the dynamic test under the actual operation condition can be simulated; the normal force, the transverse force and the thrust of the linear motor at different positions can be synchronously measured, and the test precision is improved; by changing the fixed positions of the primary and secondary stages of the linear motor and changing the structural form of the primary and secondary stages of the linear motor, the dynamic performance test of the linear motors with different structural types can be realized, so that the range of a test object is expanded, and the capital investment for equipment construction is reduced.
Compared with the prior art, the invention has the following beneficial effects:
1. the defects of disc-shaped and linear testing devices are overcome, and the adjustment of the structural parameters of the linear motor and the control of the slip ratio and the load of the linear motor are realized, so that the dynamic process of the linear motor under the actual operation condition is simulated. Meanwhile, the dynamic performance test of the linear motors with large stroke, high power and different structural types can be realized, and the capital investment of experimental equipment is reduced.
2. By introducing the auxiliary motor, torque fluctuation brought by the traction motor in the test process is inhibited, and dynamic test errors are reduced. The plurality of triaxial force sensors are adopted for testing, so that the normal force, the transverse force and the thrust of the linear motor at different positions can be synchronously measured, and the testing precision is improved.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description;
FIG. 1 is a view showing the overall structure of a test apparatus;
FIG. 2 is a top view of the testing apparatus;
FIG. 3 is a cross-sectional view of the test apparatus A-A;
FIG. 4 is a cross-sectional view of test apparatus B-B;
FIG. 5 is a diagram of a short primary linear motor testing apparatus;
FIG. 6 is a schematic view of a vertical step of the primary unit;
FIG. 7 is a schematic view of the longitudinal gap of the primary unit;
FIG. 8 is a schematic view of the lateral misalignment of the primary unit;
FIG. 9 is a schematic diagram of primary segment parallel power supply control;
FIG. 10 is a schematic diagram of a device for testing the performance of a disc-shaped linear motor;
names of reference numerals in the drawings: 11-a traction motor, 12-a traction wheel, 121-a traction wheel, 13-an auxiliary motor, 14-an auxiliary wheel, 141-an auxiliary wheel, 15-a synchronous chain, 151-a synchronous chain, 16-a driven wheel, 161-a driven wheel, 17-a driven wheel, 171-a driven wheel, 18-a fixed end, 19-a traction end, 21- "H" -shaped sliding frame, 22-a vertical displacement sliding table, 23-a transverse displacement sliding table, 24-a connecting plate of a triaxial force sensor, 241-a triaxial force sensor, 25-a secondary of a linear motor, 26-a primary of a linear motor, 27-a reflecting plate, 28-a position detector, 29-a drag chain, 31-a sliding block, 32-a linear guide rail, 33-a guide rail base, L1L 2L 3-a three-phase power supply, QS-air switch, FU-fuse, KS-AC contactor, FR-thermal relay, M-primary unit, Q-triode, VT-photoelectric switch and MCU-controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Example 1:
the overall structure diagram of the testing apparatus shown in fig. 1 mainly includes a transmission mechanism, an "H" shaped sliding rack, a linear motor, a power supply control system thereof, and a measurement control system. The transmission mechanism is composed of a linear guide rail 32, a guide rail base 33, a traction end 19 and a fixed end 18, wherein the linear guide rail 32 is installed on two sides of the guide rail base 33, the traction end 19 and the fixed end 18 are respectively fixed on two ends of the guide rail base 33, the traction end 19 is provided with a traction motor 11, traction wheels 12 and 121, an auxiliary motor 13 and auxiliary wheels 14 and 141, and the fixed end 18 is provided with driven wheels 16, 161, 17 and 171. The linear motor comprises a linear motor primary 26 and a linear motor secondary 25, and the long primary is formed by splicing primary units. The four ends of the H-shaped sliding frame 21 are provided with sliding blocks 31, the sliding blocks 31 are integrally fixed on a linear guide rail 32, and a traction loop is formed by the synchronous chains 15 and 151, the traction wheels 12 and 121, the auxiliary wheels 14 and 141 and the driven wheels 16, 161, 17 and 171. And a vertical displacement sliding table 22, a transverse displacement sliding table 23, a triaxial force sensor connecting plate 24 and a linear motor secondary 25 are sequentially arranged right below the center of the H-shaped sliding frame 21. The linear motor primary 26 is laid along the center of the rail base 33, and the position detector 28 is disposed between the primary units. The large-stroke traction of the H-shaped sliding frame 21 between the traction end 19 and the fixed end 18 can be realized by driving and controlling the traction motor 11, so that the slip ratio, the load and the like in the dynamic test process of the linear motor are indirectly controlled, the torque fluctuation of the traction motor 11 is inhibited by the auxiliary motor 13, and the dynamic test error is reduced.
Preferably, the transmission mechanism consists of two groups of parallel traction loops, so that the stability and the safety of the dynamic performance test of the high-power linear motor can be ensured;
preferably, the linear guide rail 32 is a single structure or a combined structure of a mechanical guide rail, an air-floating guide rail, a permanent magnetic guide rail and an electromagnetic suspension guide rail;
preferably, the sliding block 31 is a single structure or a combined structure of a mechanical linear bearing, an air-bearing linear bearing, a high-temperature superconducting magnetic suspension dewar, a superconducting magnet, an electromagnet and a permanent magnet;
preferably, the position detector 28 is a reflection-type photoelectric switch, and detects the running position of the "H" shaped carriage 21 in cooperation with the reflection plate 27.
Example 2:
as shown in fig. 2, fig. 3 and fig. 4, the top view, the sectional view a-a and the sectional view B-B of the testing device are shown, the H-shaped sliding frame 21, the longitudinal transmission mechanism, the vertical displacement sliding table 22 and the transverse displacement sliding table 23 form a three-axis movement mechanism, the linear motor secondary 25 is connected with the three-axis movement mechanism through the three-axis force sensor 241 and the three-axis force sensor connecting plate 24, four three-axis force sensors 241 are longitudinally and transversely uniformly distributed, and the normal force, the transverse force and the thrust force applied to different positions of the linear motor secondary 25 are measured. By controlling the vertical displacement sliding table 22 and the transverse displacement sliding table 23, the electromagnetic air gap and the transverse offset of the linear motor can be indirectly changed in the test process.
Example 3:
as shown in fig. 5, the fixing positions of the linear motor secondary 25 and the linear motor primary 26 are exchanged, so that the relative lengths of the primary and secondary are exchanged, and the device suitable for the performance test of the short primary linear motor is obtained. Similarly, the primary and secondary structures of the linear motor are changed, and the dynamic performance measuring device suitable for the unilateral long primary linear induction (synchronous) motor, the unilateral short primary linear induction (synchronous) motor, the bilateral long primary linear induction (synchronous) motor, the bilateral short primary linear induction (synchronous) motor, the long primary cylindrical linear induction (synchronous) motor and the short primary cylindrical linear induction (synchronous) motor is further obtained.
Example 4:
as shown in fig. 6, 7, and 8, the primary vertical step, the longitudinal gap, and the transverse dislocation are schematically illustrated, the primary unit is fixed to the guide rail base by bolts and "L" -shaped corner connectors, the "L" -shaped corner connectors and the guide rail base fixing holes respectively adopt a "crack" shaped groove and a strip shaped groove, and the primary unit can move vertically and longitudinally through the "crack" shaped groove, thereby realizing the arrangement of the vertical step and the longitudinal gap of the primary unit; similarly, the primary unit can horizontally and transversely move through the strip-shaped groove on the guide rail base, so that the transverse dislocation arrangement of the primary unit is realized, and the stacking thickness of the primary iron core is changed.
Example 5:
the primary segmented parallel power supply control schematic diagram shown in fig. 9 includes a weak current control circuit (left diagram) and a strong current control circuit (right diagram). The primary side of the linear motor is formed by splicing 20 sections of primary units (M1, M2, … and M20), and is connected to a three-phase power bus (L1L 2L 3) through alternating-current contactors (KS 1, KS2, … … and KS 20). Photoelectric switches (VT 1, VT2, … and VT 20) are arranged between the primary units, a controller (MCU) detects state signals of the primary units in real time, the alternating current contactor adopts a weak current relay to control the on and off of three-phase alternating current contacts, the weak current relay is connected into a weak current control circuit, the three-phase alternating current contacts are connected into a strong current control circuit, and the controller outputs control signals to control the weak current relay and indirectly control the on and off of the three-phase alternating current contacts, so that the control of the weak current on the strong current is realized. In the dynamic test process of the linear motor, when the secondary of the linear motor runs to the primary unit, the photoelectric switch corresponding to the position outputs a high level or a low level to the controller, the controller outputs a control signal to the weak current relay to control the primary unit covered by the secondary of the linear motor and the previous section and the next section of the primary to be connected with the three-phase power supply bus, and other primary sections do not supply power, so that the sectional parallel power supply control of the long primary is realized.
It can be seen that, compared with the prior art, the beneficial effects of the invention include: in the dynamic test process of the linear motor, the slip ratio, the load and the like of the linear motor can be controlled; the torque fluctuation of the traction motor is inhibited, and the dynamic test error is reduced; by changing the electromagnetic air gap, the transverse offset and the space position among the primary units of the linear motor, the assembly error of the linear motor and the dynamic test under the actual operation condition can be simulated; the normal force, the transverse force and the thrust of the linear motor at different positions can be synchronously measured, and the test precision is improved; by changing the fixed positions of the primary and secondary stages of the linear motor and changing the structural form of the primary and secondary stages of the linear motor, the dynamic performance test of the linear motors with different structural types can be realized, so that the range of a test object is expanded, and the capital investment for equipment construction is reduced.
It should be apparent that the embodiments described are some, but not all embodiments of the present application. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
Claims (9)
1. The utility model provides a high-power linear electric motor dynamic behavior testing arrangement of adjustable structure which characterized in that: the device comprises a measurement control system, a transmission mechanism, a linear motor and an H-shaped sliding frame; the linear motor comprises a linear motor primary and a linear motor secondary, the transmission mechanism comprises a linear guide rail, a guide rail base, a traction end and a fixed end, the linear guide rail is installed on two sides of the upper end of the guide rail base, an 'H' -shaped sliding frame is arranged on the linear guide rail in a sliding mode, the traction end and the fixed end are respectively fixed at two ends of the guide rail base, the traction end is provided with a traction wheel, the fixed end is provided with a driven wheel, one end of a synchronous chain is connected with one side of the 'H' -shaped sliding frame, the other end of the synchronous chain is sequentially wound on the traction wheel and the driven wheel and then connected with the other side of the 'H' -shaped sliding frame, and the traction wheel is driven by the traction motor to indirectly control the slip ratio and the load in the dynamic running process of the linear motor;
the bottom surface of a middle connecting rod of the H-shaped sliding frame is provided with a vertical displacement sliding table, the upper end of the vertical displacement sliding table penetrates through the H-shaped sliding frame and moves in the vertical direction relative to the H-shaped sliding frame, the lower end of the vertical displacement sliding table is provided with a transverse sliding groove, a transverse displacement sliding table is arranged in the transverse sliding groove in a relatively sliding manner, the bottom surface of the transverse displacement sliding table is provided with a three-axis force sensor group, a linear motor secondary is arranged on the bottom surface of the three-axis force sensor group, a linear motor primary unit is laid in the center of the length direction of the guide rail base, and the linear motor primary is formed by splicing a plurality of primary units; the guide rail base is provided with position detectors at equal intervals along one side of the primary side of the linear motor, the measurement control system is respectively connected with the position detectors and the traction motor, and the measurement control system respectively controls the position detectors and the traction motor to act; the two side edges of the primary of the linear motor are connected with L-shaped angle codes and are fixed on a guide rail base through the L-shaped angle codes, the L-shaped angle codes correspond to the primary unit and are provided with a 'patch' -shaped groove, the primary unit is adjustably and fixedly connected with the 'patch' -shaped groove through a bolt, the bottom of the guide rail base corresponding to the L-shaped angle codes is provided with a transverse strip-shaped groove, and the L-shaped angle codes are adjustably and fixedly connected with the strip-shaped groove through a bolt;
the primary unit moves longitudinally along the vertical direction and the horizontal direction through the groove of the 'strap', thereby realizing the arrangement of the vertical step and the longitudinal gap of the primary unit; similarly, the primary unit horizontally and transversely moves through the strip-shaped groove on the guide rail base, so that the transverse dislocation arrangement of the primary unit is realized, and the stack thickness of the primary iron core is changed.
2. The dynamic performance testing device of the high-power linear motor with the adjustable structure as claimed in claim 1, wherein: the traction end is also provided with an auxiliary motor and an auxiliary wheel driven by the auxiliary motor, the other end of the synchronous chain is sequentially wound on the traction wheel, the auxiliary wheel and the driven wheel and then connected with the other side of the H-shaped sliding frame, the measurement control system is connected with and drives the auxiliary motor, and the auxiliary motor inhibits the torque fluctuation of the traction motor and reduces the dynamic test error.
3. The dynamic performance testing device of the high-power linear motor with the adjustable structure as claimed in claim 2, characterized in that: the traction loops formed by the synchronous chain, the traction wheel, the auxiliary wheel and the driven wheel are more than two groups, and the more than two groups of traction loops are arranged in parallel, so that the stability and the safety of the dynamic performance test of the high-power linear motor can be ensured.
4. The dynamic performance testing device of the high-power linear motor with the adjustable structure as claimed in claim 1, wherein: four ends of the bottom surface of the H-shaped sliding frame are provided with sliding blocks, and the H-shaped sliding frame is integrally arranged on the linear guide rail in a sliding mode through the sliding blocks.
5. The structure-adjustable dynamic performance testing device for the high-power linear motor, according to claim 4, is characterized in that: the slide block is one or the combination of more than two structures of a mechanical linear bearing, an air-floatation linear bearing, a high-temperature superconducting magnetic suspension Dewar, a superconducting magnet, an electromagnet and a permanent magnet.
6. The dynamic performance testing device of the high-power linear motor with the adjustable structure as claimed in claim 1, wherein: the triaxial force sensor group consists of a plurality of triaxial force sensor units which are uniformly distributed along the longitudinal direction and the transverse direction so as to synchronously measure the normal force, the transverse force and the thrust in different position areas of the linear motor, thereby improving the test precision.
7. The structure-adjustable dynamic performance testing device for the high-power linear motor, according to claim 1, is characterized in that: the linear guide rail is a combination of one or more than two structures of a mechanical guide rail, an air-flotation guide rail, a permanent-magnet guide rail and an electromagnetic suspension guide rail; the linear motor is a single-side long primary linear induction motor, a single-side short primary linear induction motor, a double-side long primary linear induction motor, a double-side short primary linear induction motor, a long primary cylindrical linear induction motor or a short primary cylindrical linear induction motor.
8. The structure-adjustable dynamic performance testing device for the high-power linear motor, according to claim 1, is characterized in that: the position detector is a reflection-type photoelectric switch, and a reflecting plate matched with the position detector is arranged on the bottom surface of the H-shaped sliding frame so as to detect the running position of the secondary stage of the linear motor in real time in a matched manner.
9. The dynamic performance testing device of the high-power linear motor with the adjustable structure as claimed in claim 1, wherein: the power supply control system comprises a weak current control circuit and a strong current control circuit, the primary unit is connected to a three-phase power bus through an alternating current contactor, a relay is used for controlling the on and off of the alternating current contactor, the relay is connected to the weak current control circuit, and a three-phase alternating current contact is connected to the strong current control circuit, so that the strong current is controlled by the weak current;
the specific segmented power supply control process comprises the following steps: when the secondary of the linear motor runs to the primary unit, the photoelectric switch at the position outputs a high level or a low level to the controller, the controller outputs a control signal to the relay to control the primary unit covered by the secondary of the linear motor and the previous and next primary sections thereof to be connected to the three-phase power bus, and other primary sections are disconnected, so that the segmented parallel power supply control of the long primary section is realized.
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| CN202110484716.3A CN113156312B (en) | 2021-04-30 | 2021-04-30 | High-power linear electric motor dynamic behavior testing arrangement of adjustable structure |
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| CN202110484716.3A CN113156312B (en) | 2021-04-30 | 2021-04-30 | High-power linear electric motor dynamic behavior testing arrangement of adjustable structure |
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| CN113156312B true CN113156312B (en) | 2022-07-22 |
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| CN112230145A (en) * | 2020-10-16 | 2021-01-15 | 中车永济电机有限公司 | Rotation test device for modular linear induction motor |
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