Non-contact electromagnetic brake device

Abstract

The invention provides a non-contact electromagnetic brake device, and relates to the technical field of motor control, the non-contact electromagnetic brake device comprises a base, one side of the base is provided with a motor, the driving end of the motor is provided with a coupler, the base is internally provided with a rotating groove, the coupler is rotatably arranged in the rotating groove, and the rotating groove is provided with a rotating shaft; a rotating groove is formed in the base, an electromagnetic brake mechanism is arranged between the coupler and the rotating groove, an angle measurement and control mechanism is arranged on the base, the rotating groove formed in the base avoids the electromagnetic brake mechanism, the coupler is supported and fixed through the driving end of the motor, and the electromagnetic brake mechanism and the angle measurement and control mechanism are supported and fixed through the rotating groove. The relative position of the coupler and the electromagnetic brake mechanism is determined through the coupler angle measurement and control mechanism, the electromagnetic brake mechanism is made to block and attract two kinds of force of the coupler to be circularly switched, rotation of motors in a draught fan and a water pump is stopped, the coupler is limited and fixed, and therefore uncontrollable coasting of equipment such as the draught fan and the water pump is prevented.

Description

Technical Field

[0001] This invention relates to the field of motor control technology, and in particular to a non-contact electromagnetic braking device. Background Technology

[0002] Fans and pumps are common power equipment in industrial production. They bear large loads during operation and often need to be stopped quickly when the equipment is shut down. Large fans and pumps have a large moment of inertia because the total mass of their rotating parts (motor rotor, pump impeller, shaft system) is very large. It takes a long time for the motor to stop rotating completely after the power is cut off. This is called "coasting". Sometimes, slight leakage of inlet and outlet valves will cause the rotating parts to coast for a long time because the working fluid flows slowly and drives the impeller in turn, and they cannot be stopped at all.

[0003] This seriously affects the progress of maintenance work;

[0004] The common practice is to lean a thick wooden block, such as a sleeper, against the coupling and use a wire rope and a hand-operated hoist to tighten the sleeper, pressing down on the coupling and acting as a "brake". However, this method is very time-consuming and labor-intensive in practice.

[0005] Therefore, in view of the above situation, there is an urgent need to develop a non-contact electromagnetic braking device to overcome the shortcomings in current practical applications. Summary of the Invention

[0006] This invention provides a non-contact electromagnetic braking device to overcome the deficiencies in the prior art.

[0007] This invention provides a non-contact electromagnetic braking device, comprising: a base, a motor disposed on one side of the base, a coupling disposed on the drive end of the motor, a rotating groove provided in the base, the coupling rotating into the rotating groove, an electromagnetic braking mechanism disposed between the coupling and the rotating groove, and an angle measuring and control mechanism disposed on the base.

[0008] Preferably, the electromagnetic braking mechanism includes a fixed ring disposed in the rotating groove, a plurality of electromagnet cores disposed on the fixed ring, an electromagnetic coil wound around the electromagnet cores, and a permanent magnet disposed on the outer surface of the coupling.

[0009] Preferably, there is a 2-5mm gap between the outer surface of the permanent magnet and the electromagnetic coil.

[0010] Preferably, the electromagnetic braking mechanism further includes a magnetic field control component, which is disposed on the base. The magnetic field control component includes a capacitor, and the electromagnetic coil, the diode, the DC power supply, and the fuse are connected in series. The angle measurement and control mechanism is connected in parallel to both ends of the electromagnetic coil through thyristor one and thyristor two, respectively. The capacitor is connected in parallel to the DC power supply.

[0011] Preferably, the angle measurement and control mechanism also includes

[0012] A position sensor is used to measure the angular position signal of the coupling in real time. The position sensor converts the position signal into an electrical signal by sensing the rotation of the coupling.

[0013] The current control unit is used to receive position signals from the position sensor, and based on the position electrical signals, send switching signals to thyristor one or thyristor two through a predetermined algorithm to control the current direction of the electromagnetic coil.

[0014] The feedback and adjustment unit is used to achieve precise control. It adjusts the system based on real-time feedback signals from the position sensor to ensure that changes in the magnetic field are consistent with the actual motion state of the coupling.

[0015] Preferably, the operating coefficients of the predetermined algorithm are determined based on the position electrical signal:

[0016]

[0017] Among them, P N (t) represents the running coefficients of the predetermined algorithm, P (t) P represents the actual value of the electrical signal output by the position sensor. min P is the rated minimum value of the position electrical signal. max α is the rated maximum value of the position electrical signal, α is the temperature influence coefficient, and β is the conductivity.

[0018] Preferably, the current control unit pre-programming algorithm is as follows:

[0019] when

[0020] Where S(t) represents the switching state of thyristor one or thyristor two.

[0021] When S(t) = 1, thyristor one is turned on and thyristor two is turned off;

[0022] When S(t) = 0, thyristor one is turned off and thyristor two is turned on.

[0023] Preferably, the changes in the magnetic field and the actual motion state of the coupling are evaluated and optimized, and then the optimal operating environment parameters of the current control unit are obtained based on the optimized simulation model, including:

[0024] Collect all output data on magnetic field changes and the actual motion state of the coupling, and analyze the output data to obtain the synchronization parameter scores of magnetic field changes and the actual motion state of the coupling under different environmental parameters;

[0025] The synchronization parameter scores of magnetic field changes and the actual motion state of the coupling under different environmental parameters are compared with the preset synchronization performance scores.

[0026] If the synchronization parameter score of the magnetic field change and the actual motion state of the coupling is less than the preset synchronization performance score, then the running coefficient of the preset algorithm in the simulation model and the preset algorithm of the current control unit are adjusted based on the preset algorithm of the current control unit.

[0027] Using the adjusted parameter settings, rerun the simulation model and evaluate the synchronization parameters between the magnetic field changes output by the model and the actual motion state of the coupling.

[0028] Repeat the above process until the synchronization parameter score of the magnetic field change and the actual motion state of the coupling under different environmental parameters is greater than the preset synchronization performance score. The set with the largest synchronization parameter score of the magnetic field change and the actual motion state of the coupling under different environmental parameters is determined as the optimal synchronization parameter of the magnetic field change and the actual motion state of the coupling under different environmental parameters.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The permanent magnet is embedded around the coupling. Using the coupling position (angle) measuring and control device, when the permanent magnet rotates and approaches the electromagnetic coil, the electromagnetic coil is energized, generating a magnetic field of the same polarity (repulsive force) to prevent the permanent magnet from moving. When the permanent magnet rotates away from the electromagnetic coil, the direction of the current is changed. The electromagnetic coil is still energized, but a magnetic field of opposite polarity is generated (attractive force) to prevent the permanent magnet from moving. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0033] Figure 2 This is a partially enlarged view of the relative positions of the electromagnetic coil and the permanent magnet provided in an embodiment of the present invention;

[0034] Figure 3 This is a control circuit diagram provided in an embodiment of the present invention;

[0035] Figure 4 This is a working logic diagram of the angle measurement and control mechanism provided in an embodiment of the present invention.

[0036] Figure label:

[0037] 1. Base; 2. Motor; 3. Coupling; 4. Rotating slot; 5. Fixing ring; 6. Electromagnetic core; 7. Electromagnetic coil; 8. Permanent magnet; 9. Capacitor; 10. Diode; 11. DC power supply; 12. Fuse; 13. Thyristor 1; 14. Thyristor 2; 15. Angle measurement and control mechanism; 16. Position sensor. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0039] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] The present invention provides the following embodiments.

[0041] Example 1

[0042] This invention provides a non-contact electromagnetic braking device, such as... Figures 1-4 As shown, it includes: a base 1, a motor 2 is provided on one side of the base 1, a coupling 3 is provided on the drive end of the motor 2, a rotating groove 4 is provided in the base 1, the coupling 3 rotates to be provided in the rotating groove 4, an electromagnetic brake mechanism is provided between the coupling 3 and the rotating groove 4, and an angle measuring and control mechanism 15 is provided on the base 1.

[0043] The working principle and beneficial effects of the above technical solution are as follows: The rotating groove 4 opened on the base 1 avoids the electromagnetic brake mechanism, the drive end of the motor 2 supports and fixes the coupling 3, the rotating groove 4 supports and fixes the electromagnetic brake mechanism and the angle measuring and control mechanism 15, and the relative position of the coupling 3 and the electromagnetic brake mechanism is determined by the angle measuring and control mechanism 15 of the coupling 3. The direction of the current injected into the electromagnetic brake mechanism is further judged and adjusted, so that the two forces of the electromagnetic brake mechanism resisting and attracting the coupling 3 are switched in a cycle, so that the motor 2 in the fan and water pump stops rotating, thereby achieving the purpose of restricting the coupling 3 to a fixed position, thus preventing the uncontrollable coasting of the fan, water pump and other equipment.

[0044] Example 2

[0045] Based on Example 1, such as Figures 1-4 As shown, the electromagnetic brake mechanism includes a fixed ring 5, which is disposed in the rotating groove 4. Multiple electromagnet cores 6 are disposed on the fixed ring 5, and an electromagnetic coil 7 is wound around the electromagnet core 6. A permanent magnet 8 is disposed on the outer surface of the coupling 3.

[0046] A 2-5mm gap is maintained between the outer surface of the permanent magnet 8 and the electromagnetic coil 7.

[0047] The working principle and beneficial effects of the above technical solution are as follows: the rotating groove 4 supports and fixes the fixed ring 5, the inner ring of the fixed ring 5 fixes and supports multiple electromagnet cores 6, each electromagnet core 6 is mechanically fixed to the electromagnetic coil 7 on it to ensure that magnetic force is generated when energized, the outer wall of the coupling 3 fixes the permanent magnet 8, the permanent magnet 8 rotates synchronously with the coupling 3, and the outer surface of the permanent magnet 8 maintains a gap of 2-5mm with the electromagnetic coil 7 to prevent the outer surface of the permanent magnet 8 from rubbing against the electromagnetic coil 7 and affecting the rotation of the coupling 3.

[0048] Example 3

[0049] Based on Example 2, such as Figures 1-4 As shown, the electromagnetic braking mechanism also includes a magnetic field control component, which is mounted on the base 1.

[0050] The magnetic field control component includes a capacitor 9, an electromagnetic coil 7, a diode 10, a DC power supply 11, and a fuse 12 connected in series, an angle measurement and control mechanism 15 connected in parallel to the two ends of the electromagnetic coil 7 through a thyristor 13 and a thyristor 14 respectively, and a capacitor 9 connected in parallel to the DC power supply 11.

[0051] The working principle and beneficial effects of the above technical solution are as follows: Based on the position electrical signal provided by the position sensor 16, the angle measurement and control mechanism 15, after logical judgment, selects to output a switch signal to either thyristor 13 or thyristor 14. When the permanent magnet 8 rotates and approaches the electromagnetic coil 7, one end of the electromagnetic coil 7 is energized, generating a magnetic field of the same polarity. The repulsive force generated by the electromagnetic coil 7 promptly prevents the permanent magnet 8 from moving. When the permanent magnet 8 rotates away from the electromagnetic coil 7, the direction of the current is changed, and the other end of the electromagnetic coil 7 is energized, but a magnetic field of opposite polarity is generated. The attractive force generated by the electromagnetic coil 7 promptly still prevents the permanent magnet 8 from moving. When the lower thyristor 13 is turned on, the lower half of the electromagnetic coil 7 with the center tap is energized. When the upper thyristor 14 is turned on, the upper half of the electromagnetic coil 7 with the center tap is energized. Since the upper and lower coils are wound in the same direction, the magnetic field directions in the two states are exactly opposite. Through the internal logic design of the measurement and control device, thyristor 13 and thyristor 14 are not allowed to conduct at the same time. The function of capacitor 9, diode 10 and fuse 12 is to protect the reliable operation of DC power supply 11 and prevent it from being damaged by minor external faults. The fixing ring 5 is designed in two parts (i.e., upper and lower halves) for easy on-site disassembly.

[0052] Example 4

[0053] Based on Example 3, such as Figures 1-4 As shown, the angle measurement and control mechanism 15 also includes

[0054] Position sensor 16 is used to measure the angular position signal of coupling 3 in real time. Position sensor 16 converts the position signal into an electrical signal by sensing the rotation of coupling 3.

[0055] The current control unit is used to receive the position signal from the position sensor 16, and based on the position electrical signal, send a switching signal to the thyristor 13 or the thyristor 14 to control the current direction of the electromagnetic coil 7 through a predetermined algorithm.

[0056] The feedback and adjustment unit is used to achieve precise control. It adjusts the magnetic field based on the real-time feedback signal from the position sensor 16 to ensure that the magnetic field change is consistent with the actual motion state of the coupling 3.

[0057] The working principle and beneficial effects of the above technical solution are as follows: The position sensor 16 in the angle measurement and control mechanism 15 is used to measure the angle position signal of the coupling 3 in real time. The position sensor 16 converts the position signal into an electrical signal by sensing the rotation of the coupling 3. The current control unit is used to receive the position signal from the position sensor 16, and based on the position electrical signal, sends a switching signal to the thyristor 13 or the thyristor 14 through a predetermined algorithm to control the current direction of the electromagnetic coil 7. The feedback and adjustment unit is used to achieve precise control and adjust according to the real-time feedback signal of the position sensor 16 to ensure that the magnetic field change is consistent with the actual movement state of the coupling 3.

[0058] Example 5

[0059] Based on Example 4, the operating coefficients of the predetermined algorithm are determined based on the position electrical signal:

[0060]

[0061] Among them, P N (t) represents the running coefficients of the predetermined algorithm, P (t) P is the actual value of the electrical signal output by position sensor 16. min P is the rated minimum value of position electrical signal 16. max α is the rated maximum value of the position electrical signal 16, α is the temperature influence coefficient, and β is the conductivity.

[0062] The working principle and beneficial effects of the above technical solution are as follows: based on the actual value of the electrical signal output by the position sensor 16, through... The operating coefficients of the predetermined algorithm are calculated and used in the calculation of the predetermined algorithm.

[0063] Example 6

[0064] Based on Example 5, the predetermined algorithm for the current control unit is as follows:

[0065] when

[0066] Where S(t) represents the switching state of thyristor 13 or thyristor 14.

[0067] When S(t) = 1, thyristor 13 is turned on and thyristor 14 is turned off;

[0068] When S(t) = 0, thyristor 13 is turned off and thyristor 14 is turned on.

[0069] The working principle and beneficial effects of the above technical solution are as follows: the operating coefficients based on the predetermined algorithm are obtained through... The switching state of thyristor 13 or thyristor 14 is determined. When S(t) = 1, thyristor 13 is turned on and thyristor 14 is turned off. When S(t) = 0, thyristor 13 is turned off and thyristor 14 is turned on. By adjusting the direction of the current, the direction of the magnetic field is changed, thereby achieving the purpose of limiting coupling 3 to a fixed position and preventing uncontrollable coasting of equipment such as fans and pumps.

[0070] Example 7

[0071] Based on Example 6, the magnetic field changes and the actual motion state of coupling 3 are evaluated and optimized. Then, based on the optimized simulation model, the optimal operating environment parameters for the current control unit are obtained, including:

[0072] Collect all output data on magnetic field changes and the actual motion state of coupling 3, and analyze the output data to obtain the synchronization parameter scores of magnetic field changes and the actual motion state of coupling 3 under different environmental parameters;

[0073] The synchronization parameter scores of magnetic field changes and the actual motion state of coupling 3 under different environmental parameters are compared with the preset synchronization performance scores.

[0074] If the synchronization parameter score of the magnetic field change and the actual motion state of coupling 3 is less than the preset synchronization performance score, then the running coefficient of the preset algorithm in the simulation model and the preset algorithm of the current control unit are adjusted based on the preset algorithm of the current control unit.

[0075] Using the adjusted parameter settings, rerun the simulation model and evaluate the synchronization parameters between the magnetic field changes output by the model and the actual motion state of coupling 3.

[0076] Repeat the above process until the synchronization parameter score of the magnetic field change and the actual motion state of the coupling 3 under different environmental parameters is greater than the preset synchronization performance score. The set with the largest synchronization parameter score of the magnetic field change and the actual motion state of the coupling 3 under different environmental parameters is determined as the optimal synchronization parameter of the magnetic field change and the actual motion state of the coupling 3 under different environmental parameters.

[0077] The working principle and beneficial effects of the above technical solution are as follows: In this embodiment, the synchronous parameter score of magnetic field change and actual motion state of coupling 3 refers to the quantitative evaluation of the performance of magnetic field change and actual motion state of coupling 3 under different environmental parameters based on all output data of magnetic field change and actual motion state of coupling 3 output by the simulation model.

[0078] In this embodiment, the preset performance score is a minimum standard set to measure whether the synchronization between the magnetic field change and the actual motion state of the coupling 3 meets the expectations. If the parameter score of the simulation result does not reach this performance score, it means that the performance of the parameter combination is not ideal and needs further optimization.

[0079] The iterative optimization method based on the simulation model can accurately evaluate and optimize the performance of high-temperature superconducting magnets under different environmental parameters, automatically adjust the parameter combination, and ensure that the magnetic field changes and the actual motion state of the coupling 3 are synchronized to achieve optimal operation. This method improves the stability of the synchronous operation of magnetic field changes and the actual motion state of the coupling 3.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-contact electromagnetic braking device, characterized in that, include: A base (1) is provided with a motor (2) on one side of the base (1). A coupling (3) is provided on the drive end of the motor (2). A rotating groove (4) is provided in the base (1). The coupling (3) rotates into the rotating groove (4). An electromagnetic brake mechanism is provided between the coupling (3) and the rotating groove (4). An angle measuring and control mechanism (15) is provided on the base (1).

2. The non-contact electromagnetic braking device according to claim 1, characterized in that, The electromagnetic braking mechanism includes a fixed ring (5), which is disposed in the rotating groove (4). Multiple electromagnet cores (6) are disposed on the fixed ring (5). Electromagnetic coils (7) are wound around the electromagnet cores (6). A permanent magnet (8) is disposed on the outer surface of the coupling (3).

3. A non-contact electromagnetic braking device according to claim 2, characterized in that, There is a 2-5mm gap between the outer surface of the permanent magnet (8) and the electromagnetic coil (7).

4. A non-contact electromagnetic braking device according to claim 1, characterized in that, The electromagnetic braking mechanism also includes a magnetic field control component, which is mounted on the base (1). The magnetic field control component includes a capacitor (9), and the electromagnetic coil (7), diode (10), DC power supply (11), and fuse (12) are connected in series. The angle measurement and control mechanism (15) is connected in parallel to both ends of the electromagnetic coil (7) through thyristor one (13) and thyristor two (14), respectively. The capacitor (9) is connected in parallel to the DC power supply (11).

5. A non-contact electromagnetic braking device according to claim 4, characterized in that, The angle measurement and control mechanism (15) also includes The position sensor (16) is used to measure the angular position signal of the coupling (3) in real time. The position sensor (16) converts the position signal into an electrical signal by sensing the rotation of the coupling (3). The current control unit is used to receive the position signal from the position sensor (16), and send a switching signal to thyristor one (13) or thyristor two (14) based on the position electrical signal and a predetermined algorithm to control the current direction of the electromagnetic coil (7); The feedback and adjustment unit is used to achieve precise control and adjusts according to the real-time feedback signal of the position sensor (16) to ensure that the magnetic field change is consistent with the actual motion state of the coupling (3).

6. A non-contact electromagnetic braking device according to claim 5, characterized in that, Determine the operating coefficients of the predetermined algorithm based on the position electrical signal: Among them, P N (t) represents the running coefficients of the predetermined algorithm, P (t) P is the actual value of the electrical signal output by the position sensor (16). min P is the rated minimum value of the position electrical signal (16). max α is the rated maximum value of the position electrical signal (16), α is the temperature influence coefficient, and β is the conductivity.

7. A non-contact electromagnetic braking device according to claim 6, characterized in that, The current control unit's predetermined algorithm is as follows: when Where S(t) is the switching state of thyristor one (13) or thyristor two (14), When S(t) = 1, thyristor one (13) is turned on and thyristor two (14) is turned off; When S(t) = 0, thyristor one (13) is turned off and thyristor two (14) is turned on.

8. A non-contact electromagnetic braking device according to claim 5, characterized in that, The changes in the magnetic field and the actual motion state of the coupling (3) are evaluated and optimized. Then, based on the optimized simulation model, the optimal operating environment parameters of the current control unit are obtained, including: Collect all output data of magnetic field changes and actual motion state of coupling (3), and analyze the output data to obtain synchronous parameter scores of magnetic field changes and actual motion state of coupling (3) under different environmental parameters; The synchronization parameter scores of magnetic field changes and actual motion state of coupling (3) under different environmental parameters are compared with the preset synchronization performance scores. If the synchronization parameter score of the magnetic field change and the actual motion state of the coupling (3) is less than the preset synchronization performance score, then the running coefficient of the preset algorithm in the simulation model and the preset algorithm of the current control unit are adjusted based on the preset algorithm of the current control unit. Using the adjusted parameter settings, rerun the simulation model and evaluate the synchronization parameters between the magnetic field change output by the model and the actual motion state of the coupling (3). Repeat the above process until the synchronization parameter score of the magnetic field change and the actual motion state of the coupling (3) under different environmental parameters is greater than the preset synchronization performance score. The set with the largest synchronization parameter score of the magnetic field change and the actual motion state of the coupling (3) under different environmental parameters is determined as the optimal synchronization parameter of the magnetic field change and the actual motion state of the coupling (3) under different environmental parameters.

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