CN215956292U - Driving assembly and magnetic suspension equipment - Google Patents
Driving assembly and magnetic suspension equipment Download PDFInfo
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- CN215956292U CN215956292U CN202122130016.2U CN202122130016U CN215956292U CN 215956292 U CN215956292 U CN 215956292U CN 202122130016 U CN202122130016 U CN 202122130016U CN 215956292 U CN215956292 U CN 215956292U
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Abstract
The embodiment of the utility model discloses a driving assembly and magnetic suspension equipment. Therefore, the direct current voltage is output through the direct current input unit, the direct current voltage is processed through the switching circuit to determine the working voltage, the electromagnetic coil generates a magnetic field under the working voltage, and the magnetic suspension assembly is driven to work. When the position of the magnetic suspension assembly changes, the detection unit detects the position change state of the magnetic suspension assembly and outputs a detection signal according to the position change state, and then the digital controller determines a control signal according to the detection signal to drive the switching circuit to adjust the working voltage and further adjust the magnetic field intensity of the working condition of the magnetic suspension assembly, so that the magnetic suspension assembly works in a new stable state, and the use performance of the magnetic suspension electronic equipment is improved.
Description
Technical Field
The utility model relates to the technical field of magnetic suspension, in particular to a driving assembly and magnetic suspension equipment.
Background
Magnetic Levitation (EML) or EMS is a technique for levitating an object by overcoming gravity with magnetic force.
With the development and maturity of magnetic levitation technology, more and more magnetic levitation electronic devices appear in daily life, but a levitation component in the magnetic levitation electronic device can only be stably used at a specific position, when the levitation component is moved manually, the original magnetic force cannot continuously maintain the stable working state of the levitation component, and the use performance still needs to be improved.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention provide a driving assembly and a magnetic levitation device to improve the usability of a magnetic levitation electronic device.
In a first aspect, an embodiment of the present invention provides a driving assembly, where the driving assembly includes:
a DC input unit for outputting a DC voltage;
the switching circuit is connected with the direct current input unit and used for processing the direct current voltage to determine working voltage;
the electromagnetic coil is connected with the switching circuit and used for generating a magnetic field under the working voltage so as to drive the magnetic suspension assembly to work;
the detection unit is used for detecting the position change state of the magnetic suspension assembly and outputting a detection signal according to the position change state;
and the digital controller is connected with the detection unit and the switch circuit and is used for determining a control signal according to the detection signal, and the control signal is used for driving the switch circuit to adjust the working voltage.
Further, the control signal is a pulse width control signal.
Further, the control signal is a pulse width control signal which is continuously output.
Further, the switching circuit adopts a half-bridge circuit and a full-bridge circuit.
Further, the switching circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;
the first end of the second switching tube is connected with the first end of the first switching tube, the second end of the second switching tube is connected with the first end of the third switching tube, the second end of the third switching tube is connected with the second end of the fourth switching tube, and the first end of the fourth switching tube is connected with the second end of the first switching tube;
the direct current input unit is connected between the first end of the first switching tube and the second end of the fourth switching tube;
the electromagnetic coil is connected between the second end of the first switching tube and the second end of the second switching tube;
and the digital controller is respectively connected with the third end of the first switching tube, the third end of the second switching tube, the third end of the third switching tube and the third end of the fourth switching tube.
Further, the first switch tube, the second switch tube, the third switch tube and the fourth switch tube adopt MOS tubes.
Further, the detection unit adopts a hall sensor.
Further, the detection unit is specifically configured to detect a magnetic field strength of a magnetic field in which the magnetic levitation assembly is located, and determine a position change state of the magnetic levitation assembly according to the magnetic field strength.
Further, the first switch tube and the third switch tube are controlled to be conducted simultaneously, the second switch tube and the fourth switch tube are controlled to be conducted simultaneously, and when the first switch tube and the third switch tube are controlled to be conducted, the second switch tube and the fourth switch tube are controlled to be turned off.
Further, the control signal includes a first signal and a second signal, the first signal is used for controlling the first switch tube and the third switch tube, and the second signal is used for controlling the second switch tube and the fourth switch tube.
In a second aspect, an embodiment of the present invention provides a magnetic levitation apparatus, including:
the magnetic suspension assembly comprises a permanent magnet and a suspension component; and
a drive assembly as claimed in any preceding claim, for driving the magnetic levitation assembly such that the levitated member is in a levitated state.
According to the technical scheme of the embodiment of the utility model, the direct current voltage is output through the direct current input unit, and the direct current voltage is processed through the switching circuit to determine the working voltage, so that the electromagnetic coil generates a magnetic field under the working voltage and drives the magnetic suspension assembly to work. When the position of the magnetic suspension assembly changes, the position change state of the magnetic suspension assembly is detected through the detection unit, a detection signal is output according to the position change state, a control signal is determined according to the detection signal through the digital controller, the switching circuit is driven to adjust the working voltage, the magnetic field intensity of the working condition of the magnetic suspension assembly is adjusted, the magnetic suspension assembly works in a new stable state, and the use performance of the magnetic suspension electronic equipment is improved. Meanwhile, the digital controller and the switch circuit are adopted to adjust the working voltage of the electromagnetic coil, so that the feedback control loop is simple in structure, flexible to use, high in integration level and adjustment accuracy, and low in power loss generated by the whole circuit.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a drive assembly of an embodiment of the present invention;
FIG. 2 is a schematic view of a magnetic levitation apparatus of an embodiment of the present invention;
FIG. 3 is a schematic connection diagram of a switching circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the adjustment of the operating voltage of the solenoid according to the embodiment of the present invention.
In the figure, 1, a direct current input unit; 2. a switching circuit; 3. an electromagnetic coil; 4. a detection unit; 5. a digital controller; 6. a magnetic suspension assembly; 61. a permanent magnet; 62. a suspension member.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.
Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
FIG. 1 is a schematic view of a drive assembly of an embodiment of the present invention. As shown in fig. 1, the drive assembly of the present embodiment includes a direct current input unit 1, a switching circuit 2, a solenoid 3, a detection unit 4, and a digital controller 5. The dc input unit 1 is configured to output a dc voltage. The switch circuit 2 is connected to the dc input unit 1, and is configured to process the dc voltage output by the dc input unit 1 to determine an operating voltage. The electromagnetic coil 3 is connected with the switching circuit 2 and is used for generating a magnetic field under the working voltage determined by the switching circuit 2 so as to drive the magnetic suspension assembly 6 to work. The detection unit 4 is used for detecting the position change state of the magnetic suspension assembly 6 and outputting a detection signal according to the position change state of the magnetic suspension assembly 6. The digital controller 5 is connected with the detection unit 4 and the switch circuit 2, receives the detection signal transmitted by the detection unit 4, determines a control signal according to the detection signal, and outputs the control signal to the switch circuit 2, wherein the control signal is used for driving the switch circuit 2 to adjust the output working voltage.
When the magnetic suspension assembly is used, when the magnetic suspension assembly is located at the initial position, the direct current input unit outputs direct current voltage, the switching circuit processes the direct current voltage, the electromagnetic coil works at stable working voltage, and then the magnetic suspension assembly is in a stable working state. When the magnetic suspension assembly position deviates from the initial position, the detection unit outputs a detection signal according to the position change state of the magnetic suspension assembly, the digital controller determines and outputs a control signal to the switch circuit according to the detection signal, so that the switch circuit outputs a new working voltage, the magnetic suspension assembly can be in a new stable working state at a new position, the use performance of the magnetic suspension electronic equipment is favorably improved, and the problems of instability and poor use performance caused by position movement are avoided.
Meanwhile, compared with a mode of controlling based on an analog controller and a linear circuit in the prior art, the feedback control loop has the advantages of simple structure, flexible use, high integration level and adjusting accuracy and low power loss generated by the whole circuit because the digital controller and the switch circuit are adopted to adjust the working voltage of the electromagnetic coil in the embodiment.
Fig. 2 is a schematic view of a magnetic levitation apparatus according to an embodiment of the present invention. As shown in fig. 2, the magnetic levitation apparatus of the present embodiment includes a magnetic levitation assembly 6 and a driving assembly. Wherein the magnetic levitation assembly 6 comprises a permanent magnet 61 and a levitation part 62. The driving assembly includes a dc input unit 1, a switching circuit 2, a solenoid coil 3, a detection unit 4, and a digital controller 5. Meanwhile, the connection mode of the dc input unit 1, the switching circuit 2, the battery coil, the detection unit 4 and the digital controller 5 has been described previously, and will not be described herein again.
Next, the usage of the magnetic levitation lamp will be described as an example, and the levitation component is a lamp body. The lamp body may be located below the driving assembly or above the driving assembly, which is not limited in this embodiment. When the lamp body is in a stable position, because current passes through the electromagnetic coil, an attractive acting force is generated between the permanent magnet and the iron core in the electromagnetic coil, and the acting force and the gravity of the lamp body are mutually offset, so that the lamp body can be in a stable suspension state. When the position of the lamp body moves, the position of the permanent magnet also changes correspondingly, the detection unit detects the position of the lamp body to be deviated and generates a detection signal according to the position change state of the lamp body, the digital controller outputs a control signal according to the detection signal fed back by the detection unit, so that the switching circuit outputs working voltage corresponding to the current position of the lamp body under the action of the control signal, and further the magnitude and the direction of current passing through the electromagnetic coil are adjusted through the working voltage, so that the acting force of the driving assembly on the lamp body is adjusted, and the lamp body is in a new stable working state.
Optionally, the current working voltage of the electromagnetic coil in this embodiment may be only used to enable the lamp body to be in a balanced state, so as to improve the control precision in the use process of the magnetic suspension assembly, and further improve the use performance of the magnetic suspension device.
Further, the drive assembly in the present embodiment is also provided with a permanent magnet. When no current passes through the electromagnetic coil, an interaction force is generated between the permanent magnet in the driving assembly and the permanent magnet in the magnetic suspension assembly, so that the lamp body is adsorbed to the driving assembly, and the lamp body is prevented from falling and being damaged when not used.
The technical scheme of this embodiment uses through the cooperation of direct current input unit, detecting element, digital controller and switch circuit for the magnetic suspension subassembly of magnetic suspension equipment can get into new stable operating condition by the disturbance state fast when the position changes, avoids the influence of position disturbance to the magnetic suspension equipment use, and then improves the performance of magnetic suspension equipment.
Optionally, the detecting unit in this embodiment is placed in a magnetic field in which the magnetic suspension assembly operates. When the magnetic suspension assembly is in a working state, the detection unit is specifically used for detecting the magnetic field intensity of a magnetic field where the magnetic suspension assembly is located, determining the position change state of the magnetic suspension assembly according to the magnetic field intensity of the magnetic field where the magnetic suspension assembly is located, and further adjusting the working voltage of the magnetic suspension assembly according to the detected position change state. In particular, the state of change of position of the magnetic levitation assembly can be characterized in terms of the magnetic levitation assembly being closer to or farther from the drive assembly/electromagnetic coil in the drive assembly. When the magnetic suspension assembly is far away from the driving assembly, the detection unit detects that the magnetic field intensity of a magnetic field where the magnetic suspension assembly is located is weakened; when the magnetic suspension assembly is close to the driving assembly, the detection unit detects that the magnetic field intensity of the magnetic field where the magnetic suspension assembly is located becomes strong. Therefore, the detection of the position change state of the magnetic suspension assembly is realized through the detection unit, the detection mode is simple and easy, the use cost of the magnetic suspension device is saved, and the use range is expanded.
Further, the detection unit in this embodiment employs a hall sensor. A hall sensor is a magnetic field sensor made according to the hall effect. The hall voltage generated on the hall sensor changes with the change of the magnetic field strength of the magnetic field in which the hall sensor is positioned. The stronger the magnetic field intensity is, the higher the Hall voltage output by the Hall sensor is; the lower the magnetic field strength, the lower the hall voltage output by the hall sensor. Therefore, the position change state of the magnetic suspension assembly is detected through the Hall sensor, and a corresponding detection signal is output according to the specific position change state of the magnetic suspension assembly, so that the subsequent working voltage can be adjusted conveniently.
Alternatively, the switching circuit in this embodiment may employ a full-bridge circuit and a half-bridge circuit. Therefore, the switching circuits with different structures are adopted to generate target working voltage for the electromagnetic coil, and then the working voltage can be adjusted in time according to the position change state in the use process of the magnetic suspension assembly, so that the use performance of the magnetic suspension equipment is improved. Meanwhile, by providing the switching circuits in different forms, the selection of the switching circuits is more flexible and the use is more convenient.
Further, as shown in fig. 3, the switching circuit in this embodiment employs a full-bridge circuit. The switch circuit comprises a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4. A first end of the second switching tube Q2 is connected to a first end of the first switching tube Q1, a second end of the second switching tube Q2 is connected to a first end of the third switching tube Q3, a second end of the third switching tube Q3 is connected to a second end of the fourth switching tube Q4, and a first end of the fourth switching tube Q4 is connected to a second end of the first switching tube Q1. The direct current input unit is connected between the first end of the first switch tube Q1 and the second end of the fourth switch tube Q4. The electromagnetic coil is connected between the second end of the first switch tube Q1 and the second end of the second switch tube Q2. The digital controller is respectively connected with the third terminal of the first switch tube Q1, the third terminal of the second switch tube Q2, the third terminal of the third switch tube Q3 and the third terminal of the fourth switch tube Q4.
Specifically, the first switching tube, the second switching tube, the third switching tube and the fourth switching tube in this embodiment adopt N-channel MOS tubes, a first end of each switching tube is a drain, a second end is a source, and a third end is a gate. It should be understood that the channel type of the MOS transistor is not limited in this embodiment, and a P-channel type MOS transistor may also be used. Therefore, the embodiment adopts the MOS tube to design the switch circuit, so that the loss is reduced.
Optionally, the control signal output by the digital controller in this embodiment is a pulse width control signal (i.e., a PWM wave signal). Further, in this embodiment, the control signal output by the digital controller is a pulse width control signal that is continuously output. The digital controller outputs continuous pulse width control signals to drive the switch circuit, wherein the first switch tube and the third switch tube are controlled to be conducted simultaneously, and the second switch tube and the fourth switch tube are controlled to be conducted simultaneously. Meanwhile, the second switching tube and the fourth switching tube are controlled to be turned off when the first switching tube and the third switching tube are controlled to be turned on.
Further, the control signal in the present embodiment includes a first signal and a second signal. The first signal is used for controlling the first switching tube and the third switching tube, and the second signal is used for controlling the second switching tube and the fourth switching tube.
Further, the dc input unit in this embodiment outputs a dc voltage of 12V. The first control signal outputted by the digital controller directly acts on the third terminal of the first switching tube Q1 and the third terminal (i.e., gate) of the third switching tube Q3, and the second control signal outputted by the digital controller directly acts on the third terminal of the second switching tube Q2 and the third terminal (i.e., gate) of the fourth switching tube Q4. Therefore, the conducting and turning-off time of the first switching tube and the third switching tube is controlled by the first control signal output by the digital controller, the conducting and turning-off time of the second switching tube and the fourth switching tube is reasonably controlled by the second control signal output by the digital controller, and the current size and direction on the electromagnetic coil are adjusted by the energy change in the conducting and turning-off states of the first switching tube and the third switching tube (or the second switching tube or the fourth switching tube), so that the magnetic suspension assembly can reach a new stable working state as soon as possible after the position of the magnetic suspension assembly is changed.
FIG. 4 is a schematic diagram illustrating the adjustment of the operating voltage of the solenoid according to the embodiment of the present invention. As shown in fig. 4, the stage T1 corresponds to an initial stable state of the magnetic suspension assembly during use, the stage T2 corresponds to a corresponding adjustment process when the position of the magnetic suspension assembly changes during use, and the stage T3 corresponds to a new stable working state of the magnetic suspension assembly after the position of the magnetic suspension assembly changes. In the stage T1, the magnetic suspension assembly is in the initial position, and the magnetic field is generated by the electromagnetic coil under the corresponding operating voltage, so that the magnetic suspension assembly is in the stable operating state, and the initial current currently passing through the electromagnetic coil is I1. At the beginning time of the T2 stage, the position of the magnetic suspension assembly changes due to the action of external force, the detection unit outputs a corresponding detection signal based on the position change state of the magnetic suspension assembly, the digital controller outputs a corresponding PWM control signal according to the detection signal to control the switching circuit to adjust the voltage at two ends of the electromagnetic coil and the current passing through the electromagnetic coil until the end time of the T2 stage, the current passing through the electromagnetic coil changes and is stabilized again to enter the T3 stage. At the stage T3, the operating voltage of the solenoid is changed from the original operating voltage to a new operating voltage, and the current passing through the solenoid is also changed from the initial current I1 to the regulated current I2. Under the new working voltage, the magnetic suspension assembly enters a new stable working state at the changed position.
According to the technical scheme of the embodiment of the utility model, the direct current voltage is output through the direct current input unit, and the direct current voltage is processed through the switching circuit to determine the working voltage, so that the electromagnetic coil generates a magnetic field under the working voltage and drives the magnetic suspension assembly to work. When the position of the magnetic suspension assembly changes, the position change state of the magnetic suspension assembly is detected through the detection unit, a detection signal is output according to the position change state, a control signal is determined according to the detection signal through the digital controller, the switching circuit is driven to adjust the working voltage, the magnetic field intensity of the working condition of the magnetic suspension assembly is adjusted, the magnetic suspension assembly works in a new stable state, and the use performance of the magnetic suspension electronic equipment is improved. Meanwhile, the digital controller and the switch circuit are adopted to adjust the working voltage of the electromagnetic coil, so that the feedback control loop is simple in structure, flexible to use, high in integration level and adjustment accuracy, and low in power loss generated by the whole circuit.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A drive assembly, comprising:
a DC input unit for outputting a DC voltage;
the switching circuit is connected with the direct current input unit and used for processing the direct current voltage to determine working voltage;
the electromagnetic coil is connected with the switching circuit and used for generating a magnetic field under the working voltage so as to drive the magnetic suspension assembly to work;
the detection unit is used for detecting the position change state of the magnetic suspension assembly and outputting a detection signal according to the position change state;
and the digital controller is connected with the detection unit and the switch circuit and is used for determining a control signal according to the detection signal, and the control signal is used for driving the switch circuit to adjust the working voltage.
2. The drive assembly of claim 1, wherein the control signal is a pulse width control signal.
3. The drive assembly according to claim 1 or 2, wherein the control signal is a continuously output pulse width control signal.
4. The drive assembly of claim 1, wherein the switching circuit employs a half-bridge circuit and a full-bridge circuit.
5. The drive assembly of claim 1 or 4, wherein the switching circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;
the first end of the second switching tube is connected with the first end of the first switching tube, the second end of the second switching tube is connected with the first end of the third switching tube, the second end of the third switching tube is connected with the second end of the fourth switching tube, and the first end of the fourth switching tube is connected with the second end of the first switching tube;
the direct current input unit is connected between the first end of the first switching tube and the second end of the fourth switching tube;
the electromagnetic coil is connected between the second end of the first switching tube and the second end of the second switching tube;
and the digital controller is respectively connected with the third end of the first switching tube, the third end of the second switching tube, the third end of the third switching tube and the third end of the fourth switching tube.
6. The driving assembly according to claim 5, wherein the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are MOS tubes.
7. The drive assembly of claim 1, wherein the detection unit employs a hall sensor.
8. The drive assembly according to claim 1 or 7, wherein the detection unit is configured to detect a magnetic field strength of a magnetic field in which the magnetic levitation assembly is located, and to determine the position change state of the magnetic levitation assembly according to the magnetic field strength.
9. The driving assembly according to claim 5 or 6, wherein the first switching tube and the third switching tube are controlled to be turned on simultaneously, the second switching tube and the fourth switching tube are controlled to be turned on simultaneously, and the second switching tube and the fourth switching tube are controlled to be turned off when the first switching tube and the third switching tube are controlled to be turned on.
10. The drive assembly of claim 9, wherein the control signals include a first signal for controlling the first and third switching tubes and a second signal for controlling the second and fourth switching tubes.
11. Magnetic levitation apparatus, characterized in that the magnetic levitation apparatus comprises:
the magnetic suspension assembly comprises a permanent magnet and a suspension component; and
a drive assembly according to any of claims 1 to 10 for driving the magnetic levitation assembly such that the levitated member is in a levitated state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122130016.2U CN215956292U (en) | 2021-09-03 | 2021-09-03 | Driving assembly and magnetic suspension equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122130016.2U CN215956292U (en) | 2021-09-03 | 2021-09-03 | Driving assembly and magnetic suspension equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215956292U true CN215956292U (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122130016.2U Active CN215956292U (en) | 2021-09-03 | 2021-09-03 | Driving assembly and magnetic suspension equipment |
Country Status (1)
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|---|---|
| CN (1) | CN215956292U (en) |
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2021
- 2021-09-03 CN CN202122130016.2U patent/CN215956292U/en active Active
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