Inductor with electrically adjustable inductance

Abstract

The utility model discloses an inductor of electrically adjustable inductance, including air core coil and two magnetic cores of at least partial insertion in air core coil, two magnetic cores are symmetrically arranged, and the first base plate and the adjusting plate are fixed on two magnetic cores respectively, and the second base plate is arranged on the side of adjusting plate, and the electric governor of driving the magnetic core on adjusting plate is installed on the second base plate, and the drive part of electric governor is connected with adjusting plate. After the rotation driver (rotary motor) is energized, the rotation screw is driven to rotate, the rotation screw is matched with the threaded hole, the magnetic core on the adjusting plate is lifted and displaced, the air gap between a pair of magnetic cores is adjusted, or the motor or linear motor of electric linear push rod is energized to drive the magnetic core on the adjusting plate to lift and displace, the air gap between a pair of magnetic cores is adjusted, and the inductance adjustment of inductor is achieved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to an inductor with electrically adjustable inductance. Background Technology

[0002] Currently, different inductance values ​​are adjusted according to the needs of different circuit applications. Generally, the inductance value is adjusted by changing the air gap in the inductor's magnetic circuit. However, existing ordinary adjustable inductors typically use a manual adjustment mechanism to change the inductance. Manual inductance adjustment involves loosening two nuts 100 to adjust the gap between a pair of magnetic cores 101, and then tightening the two nuts. Figure 1 As shown, if the inductance needs to be adjusted, the chassis must be disassembled before adjustment can be made, making inductance adjustment cumbersome and inconvenient. Utility Model Content

[0003] The purpose of this invention is to design an electrically adjustable inductor to address the aforementioned technical deficiencies.

[0004] The inductor with electrically adjustable inductance designed in this utility model includes an air coil and two magnetic cores at least partially inserted into the air coil. The two magnetic cores are symmetrically arranged, and a first base plate and an adjustment plate are respectively fixed on the two magnetic cores. A second base plate is arranged on the side of the adjustment plate, and an electric regulator for driving the magnetic cores on the adjustment plate to move is installed on the second base plate. The driving part of the electric regulator is connected to the adjustment plate.

[0005] According to the inductor with electrically adjustable inductance described above, the electric regulator includes a rotary driver fixed on a second substrate. The adjustment plate is provided with a threaded hole, and the rotary screw on the rotary driver passes through the second substrate and is threadedly connected to the threaded hole.

[0006] According to the inductor with electrically adjustable inductance described above, the electric regulator includes an electric linear actuator or a linear motor fixed on the second base plate, and the telescopic rod of the electric linear actuator or the translation slider of the linear motor is connected to the adjustment plate.

[0007] The inductor with electrically adjustable inductance described above also includes several guide rods, one end of which is connected to the first substrate, and the other end of which passes through the guide hole of the adjustment plate and is connected to the second substrate.

[0008] According to the inductor with electrically adjustable inductance described above, the first end of the guide rod is inserted into the through hole of the first substrate, and the first end of the guide rod has a first external thread, on which two first nuts are threadedly connected, and the two first nuts clamp the first substrate.

[0009] According to the inductor with electrically adjustable inductance described above, the second end of the guide rod is inserted into the through hole of the second substrate, and the second end of the guide rod has a second external thread. Two second nuts are threadedly connected to the second external thread, and the two second nuts clamp the second substrate.

[0010] According to the inductor with electrically adjustable inductance described above, the two magnetic cores are E-shaped magnetic cores or U-shaped magnetic cores.

[0011] According to the inductor with electrically adjustable inductance described above, it further includes a control module and an inductance measurement module. The inductance measurement module includes an auxiliary winding wound around the hollow coil. The auxiliary winding is connected to the control module, and the electric regulator is electrically connected to the control module.

[0012] According to the inductor with electrically adjustable inductance described above, springs are provided between both ends of the second substrate and both ends of the adjusting plate respectively.

[0013] According to the inductor with electrically adjustable inductance described above, the first substrate is a "C"-shaped aluminum plate, and the second substrate is an I-shaped aluminum plate.

[0014] According to the inductor with electrically adjustable inductance described above, the adjusting plate is an aluminum block, and the first substrate, the adjusting plate, and the second substrate are arranged parallel to each other.

[0015] For the inductor with electrically adjustable inductance designed by the present utility model, after the rotary driver (rotary motor) is powered on and drives the rotary screw to rotate, the rotary screw is engaged with the threaded hole to achieve the lifting displacement of the magnetic core on the adjusting plate, so as to adjust the air gap between the pair of magnetic cores. Or the motor of the electric linear push rod or the linear motor is powered on to drive the magnetic core on the adjusting plate to perform lifting displacement, so as to adjust the air gap between the pair of magnetic cores, so as to achieve the adjustment of the inductance of the inductor. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the prior art;

[0017] Figure 2 is a schematic structural diagram (one) of the electrically adjustable inductor;

[0018] Figure 3 is a schematic structural diagram (two) of the electrically adjustable inductor;

[0019] Figure 4 is a schematic structural diagram (three) of the electrically adjustable inductor;

[0020] Figure 5 is a schematic structural diagram of the motor drive circuit;

[0021] Figure 6 is a schematic structural diagram of the control chip;

[0022] Figure 7 It is a schematic diagram of an inductance measurement structure.

[0023] Figure 8 It is a schematic diagram (IV) of the structure of an electrically adjustable inductor;

[0024] Figure 9 It is a schematic diagram (V) of the structure of an electrically adjustable inductor. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] As Figure 2-5 shown, the inductor with electrically adjustable inductance described in this embodiment includes a hollow coil T1 and two magnetic cores 9 at least partially inserted into the hollow coil T1. The two magnetic cores 9 are symmetrically arranged, and the two magnetic cores 9 are E-shaped magnetic cores 9 or U-shaped magnetic cores 9. A first substrate 2 and an adjustment plate 4 are respectively fixed on the two magnetic cores 9. The first substrate 2 and the adjustment plate 4 are respectively fixed on the back surfaces of the two magnetic cores 9 by glue or the like. A second substrate 3 is arranged above the adjustment plate 4. Moreover, the first substrate 2 is a "C"-shaped aluminum plate, the second substrate 3 is an I-shaped aluminum plate, and the adjustment plate 4 is an aluminum block. The first substrate 2, the adjustment plate 4, and the second substrate 3 are arranged parallel to each other.

[0028] In order to realize the electric displacement adjustment of the magnetic core 9 on the adjustment plate 4, an electric regulator for driving the magnetic core 9 on the adjustment plate 4 to displace is installed on the second substrate 3, and the driving part of the electric regulator is connected to the adjustment plate 4. Specifically, the electric regulator includes a rotary driver 5 fixed to the second substrate 3 by bolts, a threaded hole is provided on the adjustment plate 4, and the rotary screw 51 on the rotary driver 5 passes through the second substrate 3 and is threadedly connected to the threaded hole. Among them, the rotary driver 5 generally uses a servo motor, and the rotary screw 51 is fixed on the rotating shaft of the servo motor. The rotary screw 51 is made of a hard material, and when fixing, the central hole of the rotary screw 51 can be sleeved on the rotating shaft of the servo motor and then fixed by bolts between the two, or the two are fixed by interference fit; when the reduction motor is powered on and drives the rotary screw 51 to rotate, the rotary screw 51 is matched with the threaded hole to achieve the lifting displacement of the magnetic core 9 on the adjustment plate 4, so as to adjust the air gap between the pair of magnetic cores 9, so as to realize the adjustment of the inductance of the inductor. The larger the gap, the smaller the inductance, and the smaller the gap, the larger the inductance.

[0029] In this embodiment, a control module and an inductance measurement module are also included. The inductance measurement module includes an auxiliary winding T2 wound around a hollow coil T1. The auxiliary winding T2 is connected to the control module. An electric regulator is electrically connected to the control module. The control module consists of a chip U1 and a motor drive circuit (composed of transistors Q1, Q2, Q3, and Q4). The motor drive circuit is connected to a servo motor. When adjusting the gap, the inductance parameter value to be adjusted is input to the control module. The control module obtains the current inductance of the auxiliary winding in real time through the auxiliary winding based on the parameter value, and calculates the inductance of the hollow coil of the inductor based on the inductance. If the detected inductance value is greater than the inductance value to be adjusted, then... The chip controls the geared motor to operate, which in turn drives the rotating screw 51 to rotate, thereby causing the magnetic core 9 on the adjusting plate 4 to rise. This increases the gap between the two magnetic cores 9, thus gradually reducing the inductance. When the detected inductance value equals the inductance value to be adjusted, the chip controls the geared motor to stop operating. Conversely, if the detected inductance value is less than the inductance value to be adjusted, the chip controls the geared motor to operate, which in turn drives the rotating screw 51 to rotate, thereby causing the upper magnetic core 9 on the adjusting plate 4 to fall. This decreases the gap between the two magnetic cores 9, thus gradually increasing the inductance. When the detected inductance value equals the inductance value to be adjusted, the chip controls the geared motor to stop operating. The chip U1 contains programs for controlling the motor's start and stop, as well as programs for comparing the detected inductance value with the inductance value to be adjusted, thus enabling automatic adjustment of the inductor's inductance based on the input parameter values.

[0030] In this embodiment, a plurality of guide rods 6 are also included. One end of the guide rod 6 is connected to the first substrate 2, and the other end passes through the guide hole of the adjustment plate 4 and is connected to the second substrate 3. The structure makes the displacement of the adjustment plate 4 more stable and reliable, thereby improving the stability and reliability of the inductance adjustment. When the guide rod 6 is connected, the first end of the guide rod 6 is inserted into the through hole of the first substrate 2, and the first end of the guide rod 6 has a first external thread. Two first nuts 7 are threaded on the first external thread, and the two first nuts 7 clamp the first substrate 2. The second end of the guide rod 6 is inserted into the through hole of the second substrate 3, and the second end of the guide rod 6 has a second external thread. Two second nuts 8 are threaded on the second external thread, and the two second nuts 8 clamp the second substrate 3.

[0031] In this embodiment, springs are provided between the two ends of the second substrate 3 and the two ends of the adjustment plate 4, respectively. The springs 10 are sleeved on the guide rod. The structure is designed to achieve a balance of displacement distance at both ends under the setting of the two springs 10. The two ends of the springs 10 abut against the second substrate and the adjustment plate, respectively.

[0032] Example 2:

[0033] like Figure 6 and Figure 7 As shown, the electrically adjustable inductor described in this embodiment has a general structure similar to that of Embodiment 1, but differs in that the electric regulator includes an electric linear actuator 10 or a linear motor 11 fixed to the second substrate 3 by bolts. The telescopic rod of the electric linear actuator 10 or the translation slider of the linear motor 11 is connected to the adjustment plate 4 by bolts. The inductance measurement module includes an auxiliary winding wound on a hollow coil T1, which is connected to the control module. The electric regulator is electrically connected to the control module. The control module consists of a chip U1 and a motor drive circuit (composed of transistors Q1, Q2, Q3, and Q4). The motor of the electric linear actuator 10 or the linear motor 11 is electrically connected to the motor drive circuit of the control module. When adjusting the gap, the inductance parameter value to be adjusted is input to the control module. The control module obtains the current inductance of the inductor in real time through the auxiliary winding based on the parameter value. If the detected inductance value is greater than the inductance value to be adjusted, the motor of the electric linear actuator 10 or the linear motor is controlled by the chip. The linear actuator 11 operates, thereby driving the electric linear actuator 10 or the linear motor 11 to operate. This causes the telescopic rod of the electric linear actuator 10 to retract or the translation slider of the linear motor 11 to move upward, causing the magnetic core 9 on the adjusting plate 4 to rise. This increases the gap between the two magnetic cores 9, thereby gradually reducing the inductance. When the detected inductance value equals the inductance value to be adjusted, the chip controls the electric linear actuator 10 or the linear motor 11 to stop operating. If the detected inductance value is less than the inductance value to be adjusted, then... The chip controls the operation of the electric linear actuator 10 or the linear motor 11, thereby driving the electric linear actuator 10 or the linear motor 11 to extend its telescopic rod or move the translation slider of the linear motor 11 downwards. This causes the magnetic core 9 on the adjustment plate 4 to descend, reducing the gap between the two magnetic cores 9 and gradually increasing the inductance. When the detected inductance value equals the inductance value to be adjusted, the chip controls the electric linear actuator 10 or the linear motor 11 to stop working. The chip U1 contains programs for controlling the motor's start and stop, as well as programs for comparing the detected inductance value with the inductance value to be adjusted, thus enabling automatic adjustment of the inductance based on the input parameter values.

[0034] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. An inductor with electrically adjustable inductance, comprising an air-core coil (T1) and two magnetic cores (9) at least partially inserted into the air-core coil (T1), the two magnetic cores (9) being symmetrically arranged, characterized in that, A first substrate (2) and an adjusting plate (4) are respectively fixed on two magnetic cores (9). A second substrate (3) is arranged beside the adjusting plate (4). An electric regulator for driving the magnetic core (9) on the adjusting plate (4) to displace is installed on the second substrate (3), and the driving part of the electric regulator is connected to the adjusting plate (4).

2. The inductor with electrically adjustable inductance according to claim 1, characterized in that, The electric regulator includes a rotary driver (5) fixed on the second substrate (3). Threaded holes are provided on the adjusting plate (4). A rotary screw rod (51) on the rotary driver (5) penetrates through the second substrate (3) and is threadedly connected to the threaded holes.

3. The inductor with electrically adjustable inductance according to claim 1, characterized in that, The electric regulator includes an electric linear push rod (10) or a linear motor (11) fixed on the second substrate (3). The telescopic rod of the electric linear push rod (10) or the translation slider of the linear motor (11) is connected to the adjusting plate (4).

4. The inductor with electrically adjustable inductance according to claim 2 or 3, characterized in that, It further includes a plurality of guide rods (6). One end of the guide rod (6) is connected to the first substrate (2), and the other end thereof penetrates through the guide holes of the adjusting plate (4) and is connected to the second substrate (3).

5. The inductor with electrically adjustable inductance according to claim 4, characterized in that, The first end of the guide rod (6) is inserted into the through hole of the first substrate (2), and the first end of the guide rod (6) has a first external thread. Two first nuts (7) are threadedly connected to the first external thread, and the two first nuts (7) clamp the first substrate (2).

6. The inductor with electrically adjustable inductance according to claim 4, characterized in that, The second end of the guide rod (6) is inserted into the through hole of the second substrate (3), and the second end of the guide rod (6) has a second external thread. Two second nuts (8) are threadedly connected to the second external thread, and the two second nuts (8) clamp the second substrate (3).

7. The inductor with electrically adjustable inductance according to claim 1, characterized in that, The two magnetic cores (9) are E-shaped magnetic cores (9) or U-shaped magnetic cores (9).

8. The inductor with electrically adjustable inductance according to claim 2 or 3, characterized in that, It further includes a control module and an inductance measurement module. The inductance measurement module includes an auxiliary winding wound around a hollow coil (T1). The auxiliary winding is connected to the control module, and the electric regulator is electrically connected to the control module.

9. The electrically adjustable inductor according to any one of claims 1-3, 5, and 6, characterized in that, Springs are provided between the two ends of the second substrate and the two ends of the adjusting plate respectively.

10. The electrically adjustable inductor according to any one of claims 1-3 and 5-7, characterized in that, The first substrate (2) is a "C"-shaped aluminum plate, the second substrate (3) is an I-shaped aluminum plate, and the adjusting plate (4) is an aluminum block. The first substrate (2), the adjusting plate (4) and the second substrate (3) are arranged parallel to each other.

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