An adjustable high-precision high-voltage power supply and a high-voltage output control method thereof

Abstract

The present invention discloses an adjustable high-precision high-voltage power supply, including a power supply body, one side of which is provided with an output terminal and an input terminal; a protective device is provided on the outside of the power supply body, and the protective device includes: a telescopic mechanism, which is provided on the outside of the power supply body; a sealing bearing mechanism, which is provided on the inside of the telescopic mechanism; and a limiting mechanism, which is provided on the inside of the telescopic mechanism. The present invention utilizes a setting method in which the telescopic mechanism, the sealing bearing mechanism and the limiting mechanism cooperate with each other, so that the output terminal and the input terminal of the high-voltage power supply can be sealed when the high-voltage power supply is not in use, thereby preventing foreign objects such as dust and impurities from entering the inside of the output terminal and the input terminal. At the same time, when the high-voltage power supply is in use, the connection wires plugged into the output terminal and the input terminal can be limited, thereby preventing the connection wires from falling off due to external factors, thereby ensuring the normal use of the high-voltage power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic dust removal related equipment, and in particular to an adjustable high-precision high-voltage power supply and a high-voltage output control method thereof. Background Art

[0002] At present, the domestic electrostatic precipitator power supplies mainly include single-phase industrial frequency power supply, single-phase constant current power supply, three-phase industrial frequency power supply, high-voltage power supply and pulse power supply. The high-voltage power supply is mainly used to generate a strong electric field to charge the dust particles in the dust-laden gas and adsorb them onto the dust collecting plate under the action of the electric field force, thereby achieving gas purification.

[0003] The existing high-voltage power supply is powered by a 24V DC power supply and is compact and thin. It can be combined with applications that require high-precision high voltage. It is widely used in industries such as electrostatic detection standard generators and semiconductor detection high-precision anti-static control.

[0004] When not in use, the output and input ends of the above-mentioned high-voltage power supply are in an exposed state. In an environment where electrostatic dust removal is required, dust and impurities are more likely to enter the interior, thus affecting normal use. When in use, the output and input ends are connected to external machine connection lines. In order to avoid contact with various external factors, the high-voltage power supply is generally placed on the top of the machine. When the machine is operating, vibrations will be generated, which may cause the connection lines to gradually loosen, requiring regular climbing inspection and maintenance, which is relatively inconvenient. Summary of the invention

[0005] The object of the present invention is to provide an adjustable high-precision high-voltage power supply and a high-voltage output control method thereof to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an adjustable high-precision high-voltage power supply, comprising a power supply body, one side of which is provided with an output terminal and an input terminal;

[0007] A protective device is arranged outside the power source body, and the protective device comprises a telescopic mechanism, a sealing bearing mechanism and a limiting mechanism;

[0008] The telescopic mechanism is arranged outside the power supply body and is used for sealing the input end and limiting the position of the connecting wire with the output end. The telescopic mechanism includes:

[0009] A sleeve, wherein the sleeve is fixedly connected to the outer wall of the power source body;

[0010] A telescopic rod, the telescopic rod is parallel to the long side of the power source body and is slidably connected with the inner cavity of the sleeve;

[0011] A rotating block, wherein the outer wall of the telescopic rod is provided with a rotating groove, the rotating block is slidably connected with the inner cavity of the rotating groove, and the cross section of the rotating block is T-shaped;

[0012] An L-shaped plate, wherein the L-shaped plate is rotatably connected to the telescopic rod through a rotating block, a sealing groove is provided at the bottom end of the L-shaped plate, and a groove is provided at the top end of the L-shaped plate;

[0013] A positioning component, which is arranged inside the L-shaped plate and is used for multi-point positioning of the L-shaped plate and the telescopic rod;

[0014] A limiting component, wherein the limiting component is arranged inside the L-shaped plate;

[0015] The sealing bearing mechanism is arranged inside the sealing groove and is used for sealing the output end and supporting the connection line with the output end;

[0016] The limiting mechanism is arranged inside the groove and is used to limit the input end connecting line.

[0017] Preferably, the positioning component comprises:

[0018] A slider, wherein a slide groove is provided at the bottom end of the L-shaped plate, the slider is slidably connected with the inner cavity of the slide groove, and the cross-sections of the slider and the slide groove are both T-shaped;

[0019] A pull block, the pull block is fixedly connected to the bottom end of the slider, the cross section of the pull block is triangular, a linkage groove is provided in the middle of the pull block, and the limit assembly cooperates with the linkage groove;

[0020] A positioning rod, wherein the outer wall of the rotating block is provided with a through hole, the inner wall of the sleeve is provided with a plurality of positioning holes at equal intervals, one end of the positioning rod is fixedly connected to the slider, and the other end of the positioning rod passes through the through hole and is slidably connected to the inner cavity of the positioning hole;

[0021] A first compression spring, wherein the first compression spring is arranged inside the slide slot, one end of the first compression spring is fixedly connected to the slider, and the other end of the first compression spring is fixedly connected to the inner wall of the slide slot;

[0022] A clamping assembly is arranged inside the positioning assembly.

[0023] Preferably, the clamping assembly comprises:

[0024] A clamping rod, wherein a clamping groove is provided in the middle of the pull block, one end of the clamping rod is slidably connected with the inner cavity of the clamping groove, and the other end of the clamping rod passes through the pull block and is slidably connected with the inner cavity of the linkage groove;

[0025] Sliding blocks, wherein a plurality of the sliding blocks are respectively fixedly connected to the two sides of the clamping rod, and sliding grooves are provided on both sides of the inner wall of the clamping groove, and the sliding blocks are slidably interlaced with the inner cavity of the sliding groove;

[0026] A second compression spring, wherein the second compression spring is arranged inside the sliding groove, one end of the second compression spring is fixedly connected to the sliding block, and the other end of the second compression spring is fixedly connected to the inner wall of the sliding groove.

[0027] Preferably, the limiting component comprises:

[0028] An extrusion plate, wherein a plurality of extrusion grooves are symmetrically opened inside the L-shaped plate with the sealing groove as the center, and the extrusion plate is slidably interlaced with the inner cavity of the extrusion groove;

[0029] A limiting rod, wherein both sides of the inner wall of the sealing groove are provided with limiting grooves, one end of the limiting rod is slidably interlaced with the inner cavity of the limiting groove, and the limiting rod is slidably interlaced with the inner cavity of the extrusion plate;

[0030] Extrusion blocks, wherein a plurality of the extrusion blocks are respectively fixedly connected to both sides of the limit rod, and both sides of the inner wall of the extrusion plate are provided with oblique grooves, and the extrusion blocks are slidably interlaced with the inner cavity of the oblique grooves;

[0031] A connecting rope, both ends of which are fixedly connected to the plurality of extrusion plates;

[0032] A linkage rod, one end of which is fixedly connected to one of the extrusion plates, and the linkage rod cooperates with the inner cavity of the linkage groove;

[0033] The third compression spring, multiple third compression springs are respectively sleeved on the outside of the connecting rope and the linkage rod, one ends of the multiple third compression springs are respectively fixedly connected to the multiple extrusion plates, and the other ends of the multiple third compression springs are respectively fixedly connected to the inner walls of the multiple extrusion grooves.

[0034] Preferably, a C-shaped groove is opened between the multiple extrusion grooves, and multiple reversing wheels are fixedly installed inside the C-shaped groove. The connecting rope is located inside the C-shaped groove, and the connecting rope cooperates with the multiple reversing wheels.

[0035] Preferably, the sealing bearing mechanism comprises:

[0036] A supporting plate, the supporting plate is located inside the sealing groove, and limiting holes are provided on both sides of the supporting plate, and the other end of the limiting rod is slidably connected with the inner cavity of the limiting hole;

[0037] A sealing plug, which is fixedly connected to a side of the supporting plate close to the power supply body and is used to seal the output end;

[0038] A connecting plate, wherein a plurality of the connecting plates are fixedly connected to the top of the supporting plate, a plurality of connecting grooves are equidistantly provided at the top of the inner wall of the sealing groove, and the connecting plates are slidably connected with the inner cavity of the connecting groove;

[0039] The rotating rods are fixedly connected to the two sides of the connecting plate respectively, and the two sides of the inner wall of the connecting groove are provided with transverse grooves, and the rotating rods are connected with the inner cavity of the transverse grooves by sliding insertion.

[0040] Preferably, the limiting mechanism comprises:

[0041] A U-shaped block, the U-shaped block is located inside the groove;

[0042] Support blocks, wherein a plurality of the support blocks are respectively fixedly connected to the two sides of the U-shaped block, and support grooves are provided on both sides of the inner wall of the groove, and the support blocks are slidably interlaced with the inner cavity of the support grooves;

[0043] Steel balls, a U-shaped groove is provided inside the U-shaped block, and a plurality of the steel balls are located inside the U-shaped groove;

[0044] The partition is fixedly connected to the center of the U-shaped groove, and the plurality of steel balls are symmetrically arranged with the partition as the center.

[0045] Preferably, an indicator light is provided on one side of the power supply body, and the indicator light is located inside the groove.

[0046] The present invention also provides a high-voltage output control method of an adjustable high-precision high-voltage power supply, comprising the following specific steps:

[0047] Step 1: Initialize ADC, DAC, USART, GPIO, timer, HRTIM, DMA, I2C and EEPROM, preset a specific address of EEPROM to store communication data, and initialize the device address to 0x01;

[0048] Step 2: Output two PWM waveforms with different phases through the high-precision timer HRTIM to generate the corresponding voltage;

[0049] Step 3: Use the incremental PID algorithm to control the voltage output voltage value and use PID to achieve closed-loop control;

[0050] Step 4: The hardware divides the feedback voltage to three ADCs and calibrates the three ADCs respectively. The measured actual output voltage is transmitted to the MCU through 485 communication, and compared with the current value calculated by the feedback value to obtain the functional relationship. The proportional coefficient data of the functional relationship is stored in the EEPROM through I2C control, and the MCU reads the specific EEPROM address;

[0051] Step 5: Use DAC driver to convert the current value into the corresponding voltage;

[0052] Step 6: Transmit the control information to the microcontroller through the industrial control screen, and display the feedback voltage on the screen;

[0053] Step 7: The timer controls the flashing time, and the GPIO low level controls the lighting.

[0054] Technical effects and advantages of the present invention:

[0055] (1) The present invention utilizes a configuration mode in which a telescopic mechanism, a sealing bearing mechanism and a limiting mechanism are coordinated, and utilizes the positive and negative flipping of the L-shaped plate in the telescopic mechanism. When the high-voltage power supply is not in use, the output end and the input end of the high-voltage power supply can be sealed by the L-shaped plate and the sealing bearing mechanism, thereby preventing foreign objects such as dust and impurities from entering the interior of the output end and the input end, thereby affecting the use of the high-voltage power supply. At the same time, when the high-voltage power supply is in use, the connection wires plugged into the output end and the input end can be limited by the flipping of the L-shaped plate and the limiting mechanism, thereby preventing the connection wires plugged into the output end and the input end of the high-voltage power supply from falling off due to external factors, thereby ensuring the normal use of the high-voltage power supply.

[0056] (2) The present invention utilizes a sleeve, a telescopic rod, a rotating block, an L-shaped plate, a positioning assembly and a limiting assembly in a coordinated arrangement. The telescopic rod slides inside the sleeve, so that the L-shaped plate can be turned over under the rotation of the rotating block, and the positioning assembly can be used to position the L-shaped plate after turning over. The positioning assembly can also position the telescopic rod while positioning the L-shaped plate, so that the L-shaped plate can be re-attached to the outer wall of the high-voltage power supply. The L-shaped plate can be turned over and positioned and the telescopic rod can be telescoped and positioned by a positioning assembly, which is easy to use. The limiting assembly can fix the sealing bearing mechanism. Inside the L-shaped plate, when the high-voltage power supply is not in use, the input end and the output end of the high-voltage power supply are sealed by utilizing the shape of the L-shaped plate itself and the sealing bearing mechanism, thereby preventing foreign objects such as dust and impurities from entering the inside of the output end and the input end, thereby affecting the use of the high-voltage power supply. At the same time, when the high-voltage power supply is in use, the L-shaped plate can be turned over, and the limiting assembly and the limiting mechanism can be used to limit the connection wires plugged into the output end and the input end, thereby preventing the connection wires plugged into the output end and the input end of the high-voltage power supply from falling off due to external factors, thereby ensuring the normal use of the high-voltage power supply;

[0057] (3) The present invention utilizes a setting method in which the slider, the pull block, the positioning rod, the first compression spring and the clamping assembly cooperate with each other. The pull block can not only release the position limit of the positioning rod on the L-shaped plate and the telescopic rod, so that the L-shaped plate can be displaced by the telescopic rod and flipped by the rotating block, but also can use its own shape to drive the linkage rod to move while pulling, thereby releasing the limit of the support plate or the screw on the output terminal connecting line by the limit rod in the limit assembly. The clamping assembly is easy to use. The clamping assembly can prevent the insertion and sliding of the pull block and the linkage rod after the positioning is completed, thereby effectively preventing the positioning function from failing and making the whole more stable when in use.

[0058] (4) The present invention utilizes a supporting plate, a sealing plug, a connecting plate and a rotating rod to coordinate with each other, so that when the high-voltage power supply is not in use, the supporting plate can be limited inside the L-shaped plate by a limiting assembly, so that the sealing plug can seal the output end of the high-voltage power supply. When the high-voltage power supply is in use, the supporting plate can be flipped out of the L-shaped plate by the connecting plate and the rotating rod to support the connecting wire plugged into the output end of the high-voltage power supply, thereby reducing the weight of the connecting wire itself and the stress generated at the connection point by the possible pulling force, reducing the risk of loose connection or damage, avoiding excessive bending or twisting of the connecting wire at the interface, extending its service life, and making the arrangement of the connecting wire more regular, which is convenient for subsequent maintenance and management;

[0059] (5) The present invention utilizes a U-shaped block, a support block, a steel ball and a partition plate in a coordinated arrangement. When the high-voltage power supply is not in use, the steel ball can be stored inside the L-shaped plate by the gravity of the steel ball, and the central cavity of the U-shaped block corresponds exactly to the position of the indicator light, which can protect the indicator light while not affecting the operator's normal observation of the indicator light. When the high-voltage power supply is in use, the gravity of the steel ball can be utilized so that when the L-shaped plate is flipped, the U-shaped block slides out through the support block, thereby preventing the connection line plugged into the input end of the high-voltage power supply from falling off and limiting the position. At the same time, the sliding out of the U-shaped block will not affect the operator's normal observation of the indicator light, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is one of the overall structural schematic diagrams of the present invention.

[0061] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0062] Figure 3 It is a schematic diagram of the internal structure of the protective device of the present invention from the side.

[0063] Figure 4 It is a schematic diagram of the internal structure of the telescopic mechanism of the present invention from the side.

[0064] Figure 5 It is a schematic diagram of the internal structure of the limiting mechanism of the present invention from the side.

[0065] Figure 6 It is a schematic diagram of the internal structure of the sealing bearing mechanism of the present invention at the front side.

[0066] Figure 7 It is a structural schematic diagram of the pull block of the present invention.

[0067] Figure 8 It is a schematic diagram of the internal structure of the pull block of the present invention viewed from above.

[0068] Fig. 9 It is a schematic diagram of the PID algorithm formula of the present invention.

[0069] Fig.10 This is the output voltage logic flow chart of the present invention.

[0070] Fig.11 This is a principle block diagram of the high voltage power supply of the present invention.

[0071] Fig.12 This is a schematic diagram of the interface circuit principle of the DB9 plug part of the present invention.

[0072] Fig.13 This is a schematic diagram of the DC\DC output circuit principle of the present invention.

[0073] Fig.14 It is a schematic diagram of the principle of the high-voltage abnormal fault detection circuit of the present invention.

[0074] Fig.15 This is one of the schematic diagrams of the principle structure of the voltage doubler drive component circuit of the present invention.

[0075] Fig.16 This is the second schematic diagram of the circuit principle structure of the voltage doubler driving component of the present invention.

[0076] Fig.17 It is a schematic diagram of the principle structure of the positive / negative high voltage component circuit of the present invention.

[0077] Fig.18 This is a schematic diagram of the circuit principle of the 485 communication component of the present invention.

[0078] Fig.19 This is a schematic diagram of the circuit principle of the high-voltage sampling feedback component of the present invention.

[0079] In the figure: 1. power supply body; 2. output end; 3. input end; 4. indicator light; 5. telescopic mechanism; 51. sleeve; 52. telescopic rod; 53. rotating block; 54. L-shaped plate; 55. positioning assembly; 551. slider; 552. pull block; 553. positioning rod; 554. first compression spring; 555. clamping assembly; 5551. clamping rod; 5552. sliding block; 5553. second compression spring; 56. limiting assembly; 561. extrusion plate; 562. limiting rod; 563. extrusion block; 564. connecting rope; 565. linkage rod; 566. third compression spring; 567. reversing wheel; 6. sealing bearing mechanism; 61. supporting plate; 62. sealing plug; 63. connecting plate; 64. rotating rod; 7. limiting mechanism; 71. U-shaped block; 72. supporting block; 73. steel ball; 74. partition. DETAILED DESCRIPTION

[0080] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0081] The present invention provides Figure 1-19 An adjustable high-precision high-voltage power supply shown includes a power supply body 1, and an output terminal 2 and an input terminal 3 are provided on one side of the power supply body 1;

[0082] Furthermore, a protective device is provided on the outside of the power supply body 1, and the protective device includes a telescopic mechanism 5, a sealing bearing mechanism 6 and a limiting mechanism 7. The telescopic mechanism 5 is provided on the outside of the power supply body 1, and is used to seal the input end 3 and limit the connection line with the output end 2; the sealing bearing mechanism 6 is provided inside the telescopic mechanism 5, and is used to seal the output end 2 and support the connection line with the output end 2; the limiting mechanism 7 is provided inside the telescopic mechanism 5, and is used to limit the connection line of the input end 3. By turning the L-shaped plate 54 in the telescopic mechanism 5 positively and negatively, the high-voltage power supply can be When not in use, the output terminal 2 and the input terminal 3 of the high-voltage power supply are sealed by the L-shaped plate 54 and the sealing bearing mechanism 6, so as to prevent foreign objects such as dust and impurities from entering the interior of the output terminal 2 and the input terminal 3, thereby affecting the use of the high-voltage power supply. At the same time, when the high-voltage power supply is in use, the connection wires plugged into the output terminal 2 and the input terminal 3 can be limited by flipping the L-shaped plate 54 and the limiting mechanism 7, so as to prevent the connection wires plugged into the output terminal 2 and the input terminal 3 of the high-voltage power supply from falling off due to external factors, thereby ensuring the normal use of the high-voltage power supply.

[0083] Specifically, the telescopic mechanism 5 includes: a sleeve 51, a telescopic rod 52, a rotating block 53, an L-shaped plate 54, a positioning assembly 55 and a limiting assembly 56. The sleeve 51 is fixedly connected to the outer wall of the power supply body 1; the telescopic rod 52 is parallel to the long side of the power supply body 1 and is slidably connected with the inner cavity of the sleeve 51; the outer wall of the telescopic rod 52 is provided with a rotating groove, and the rotating block 53 is slidably connected with the inner cavity of the rotating groove, and the cross section of the rotating block 53 is T-shaped; the L-shaped plate 54 is rotatably connected to the telescopic rod 52 through the rotating block 53, and a sealing groove is provided at the bottom end of the L-shaped plate 54, and the sealing bearing mechanism 6 is arranged inside the sealing groove, L The top of the L-shaped plate 54 is provided with a groove, and the limiting mechanism 7 is arranged inside the groove. When the L-shaped plate 54 is turned over by the rotating block 53, the telescopic rod 52 needs to be horizontally displaced inside the sleeve 51 to complete the turning. Therefore, the positioning component 55 can not only rotate and position the L-shaped plate 54, but also limit the position of the telescopic rod 52, which is convenient for use. The positioning component 55 is arranged inside the L-shaped plate 54 for multi-point positioning of the L-shaped plate 54 and the telescopic rod 52; the limiting component 56 is arranged inside the L-shaped plate 54 for positioning the sealing bearing mechanism 6 and the connecting line of the output end 2. The telescopic rod 52 is slidable inside the sleeve 51, so that the L-shaped plate 54 can be turned over under the rotation of the rotating block 53, and the positioning assembly 55 can be positioned so that the L-shaped plate 54 can be positioned after turning over. The positioning assembly 55 can also position the telescopic rod 52 while positioning the L-shaped plate 54, so that the L-shaped plate 54 can be re-attached to the outer wall of the high-voltage power supply. The flipping positioning of the L-shaped plate 54 and the telescopic positioning of the telescopic rod 52 are realized by a positioning assembly 55, which is convenient for use, and the limiting assembly 56 can fix the sealing bearing mechanism 6 inside the L-shaped plate 54, so that When the high-voltage power supply is not in use, the shape of the L-shaped plate 54 and the sealing bearing mechanism 6 are used to seal the input terminal 3 and the output terminal 2 of the high-voltage power supply, thereby preventing foreign objects such as dust and impurities from entering the interior of the output terminal 2 and the input terminal 3, thereby affecting the use of the high-voltage power supply. At the same time, when the high-voltage power supply is in use, the L-shaped plate 54 can be flipped, and the limiting component 56 and the limiting mechanism 7 can be used to limit the connection wires plugged into the output terminal 2 and the input terminal 3, respectively, thereby preventing the connection wires plugged into the output terminal 2 and the input terminal 3 of the high-voltage power supply from falling off due to external factors, thereby ensuring the normal use of the high-voltage power supply.

[0084] Furthermore, the positioning assembly 55 includes: a slider 551, a pull block 552, a positioning rod 553, a first compression spring 554 and a clamping assembly 555. A slide groove is provided at the bottom end of the L-shaped plate 54. The slider 551 is slidably connected with the inner cavity of the slide groove. The cross-sections of the slider 551 and the slide groove are both T-shaped. The pull block 552 is fixedly connected to the bottom end of the slider 551. The cross-section of the pull block 552 is triangular. A linkage groove is provided in the middle of the pull block 552. The limit assembly 56 is connected with the linkage. The grooves cooperate with each other; a through hole is opened on the outer wall of the rotating block 53, and a plurality of positioning holes are opened at equal intervals on the inner wall of the sleeve 51; one end of the positioning rod 553 is fixedly connected to the slider 551, and the other end of the positioning rod 553 passes through the through hole and is slidably connected with the inner cavity of the positioning hole; a first compression spring 554 is arranged inside the slide groove, one end of the first compression spring 554 is fixedly connected to the slider 551, and the other end of the first compression spring 554 is fixedly connected to the inner wall of the slide groove, and the first compression spring 5 54 is always in a compressed state, so that a stable elastic force can be provided to the positioning rod 553 through the slider 551, so that the positioning rod 553 can stably position the telescopic rod 52 and the L-shaped plate 54; the clamping assembly 555 is arranged inside the positioning assembly 55, and the pulling block 552 can not only release the position limitation of the positioning rod 553 on the L-shaped plate 54 and the telescopic rod 52, so that the L-shaped plate 54 can be displaced by the telescopic rod 52 and turned over by the rotating block 53, but also can use its own shape to drive the linkage rod 565 to move while pulling, thereby releasing the limitation of the limiting rod 562 in the limiting assembly 56 on the supporting plate 61 or the screws on the output end connecting line, achieving multiple goals at one stroke and being easy to use. The setting of the clamping assembly 555 can make the clamping assembly 555 hinder the interlacing and sliding of the pulling block 552 and the linkage rod 565 after the overall positioning is completed, thereby effectively preventing the positioning function from failing and making the overall more stable when in use.

[0085] Furthermore, the clamping assembly 555 includes: a clamping rod 5551, a sliding block 5552 and a second compression spring 5553. A clamping groove is provided in the middle of the pull block 552. One end of the clamping rod 5551 is slidably inserted and connected with the inner cavity of the clamping groove. The other end of the clamping rod 5551 passes through the pull block 552 and is slidably inserted and connected with the inner cavity of the linkage groove. A plurality of sliding blocks 5552 are respectively fixedly connected to the two sides of the clamping rod 5551. Both sides of the inner wall of the clamping groove are provided with sliding grooves. The sliding blocks 5552 are slidably inserted and connected with the inner cavity of the sliding groove. The second compression spring 5553 is arranged inside the sliding groove. The second compression spring 555 One end of the second compression spring 5553 is fixedly connected to the sliding block 5552, and the other end of the second compression spring 5553 is fixedly connected to the inner wall of the sliding groove. The second compression spring 5553 is always in a compressed state, so that the sliding block 5552 can provide a stable elastic force to the clamping rod 5551, so that one end of the clamping rod 5551 always extends out of the pulling block 552, and the other end can always be able to extend into the interior of the linkage groove. When the positioning rod 553 is released to position the telescopic rod 52 and the L-shaped plate 54, one end of the clamping rod 5551 can be pressed by a finger, so that the pulling block 552 can be pulled while the limit of the clamping rod 5551 is released, which is convenient for use.

[0086] Specifically, the limiting assembly 56 includes: an extrusion plate 561, a limiting rod 562, an extrusion block 563, a connecting rope 564, a linkage rod 565 and a third compression spring 566. The L-shaped plate 54 has a plurality of extrusion grooves symmetrically arranged with the sealing groove as the center. The extrusion plate 561 is slidably connected with the inner cavity of the extrusion groove; limiting grooves are arranged on both sides of the inner wall of the sealing groove, one end of the limiting rod 562 is slidably connected with the inner cavity of the limiting groove, and the limiting rod 562 is slidably connected with the inner cavity of the extrusion plate 561; a plurality of extrusion blocks 563 are fixedly connected On both sides of the limiting rod 562, both sides of the inner wall of the extrusion plate 561 are provided with oblique grooves, and the extrusion block 563 is slidably connected with the inner cavity of the oblique groove; the two ends of the connecting rope 564 are respectively fixedly connected with the multiple extrusion plates 561; one end of the linkage rod 565 is fixedly connected with one of the extrusion plates 561, and the linkage rod 565 cooperates with the inner cavity of the linkage groove; multiple third compression springs 566 are respectively sleeved on the outside of the connecting rope 564 and the linkage rod 565, and one end of the multiple third compression springs 566 is respectively fixedly connected with the multiple extrusion plates 561, and multiple The other ends of the third compression springs 566 are respectively fixedly connected to the inner walls of the plurality of extrusion grooves, and the third compression springs 566 are always in a compressed state, thereby providing a stable elastic force to the extrusion plate 561, and then the extrusion block 563 can drive the limiting rod 562 to always extend into the interior of the sealing groove through the inclined groove, so as to limit the fixing screws on the support plate 61 or the connecting line plugged with the output end 2, and when the pull block 552 is pulled, the linkage rod 565 can be squeezed by the shape of the pull block 552 itself, so that the linkage rod 565 is in the linkage groove. The pull block 552 can slide inside and continuously pull the extrusion plate 561 as the pull block 552 moves, so that the inner wall of the inclined groove can squeeze the extrusion block 563, so that the limiting rod 562 releases the limiting of the fixing screws on the supporting plate 61 or the connecting line plugged with the output end 2. While the pull block 552 pulls the positioning rod 553 to release the positioning of the telescopic rod 52 and the L-shaped plate 54, it can also apply force to the linkage rod 565, so that the limiting rod 562 can release the limiting of the fixing screws on the supporting plate 61 or the connecting line plugged with the output end 2, which is convenient for use.

[0087] Furthermore, a C-shaped groove is opened between the multiple extrusion grooves, and a plurality of reversing wheels 567 are fixedly installed inside the C-shaped groove. The connecting rope 564 is located inside the C-shaped groove. The connecting rope 564 cooperates with the multiple reversing wheels 567. The reversing wheels 567 support and reverse the connecting rope 564, so that the connecting rope 564 avoids direct friction with the inner wall of the C-shaped groove, thereby extending the service life of the device.

[0088] Specifically, the sealing bearing mechanism 6 includes: a supporting plate 61, a sealing plug 62, a connecting plate 63 and a rotating rod 64. The supporting plate 61 is located inside the sealing groove. Limiting holes are provided on both sides of the supporting plate 61. The other end of the limiting rod 562 is slidably inserted and connected with the inner cavity of the limiting hole; the sealing plug 62 is fixedly connected to the side of the supporting plate 61 close to the power supply body 1, and is used to seal the output end 2; multiple connecting plates 63 are fixedly connected to the top of the supporting plate 61, and multiple connecting grooves are equidistantly provided at the top of the inner wall of the sealing groove. The connecting plate 63 is slidably inserted and connected with the inner cavity of the connecting groove; multiple rotating rods 64 are respectively fixedly connected to both sides of the connecting plate 63, and transverse grooves are provided on both sides of the inner wall of the connecting groove. The rotating rod 64 and the transverse grooves The inner cavity is slidably connected. When the high-voltage power supply is not in use, the support plate 61 can be limited inside the L-shaped plate 54 by the limit rod 562, so that the sealing plug 62 can seal the output end 2 of the high-voltage power supply. When the high-voltage power supply is in use, the support plate 61 can be flipped out of the L-shaped plate 54 by the connecting plate 63 and the rotating rod 64 to support the connecting wire plugged into the output end 2 of the high-voltage power supply, thereby reducing the weight of the connecting wire itself and the stress generated at the connection point by the possible pulling force, reducing the risk of loose connection or damage, avoiding excessive bending or twisting of the connecting wire at the interface, extending its service life, and making the arrangement of the connecting wire more regular, which is convenient for subsequent maintenance and management.

[0089] Specifically, the limiting mechanism 7 includes: a U-shaped block 71, a support block 72, a steel ball 73 and a partition 74. The U-shaped block 71 is located inside the groove; a plurality of support blocks 72 are respectively fixedly connected to the two sides of the U-shaped block 71, and support grooves are provided on both sides of the inner wall of the groove. The support blocks 72 are slidably connected with the inner cavity of the support groove; a U-shaped groove is provided inside the U-shaped block 71, and a plurality of steel balls 73 are located inside the U-shaped groove; the partition 74 is fixedly connected to the center of the U-shaped groove, and a plurality of steel balls 73 are symmetrically arranged with the partition 74 as the center, so that the high-voltage power supply can be used when not in use. The steel ball 73 is accommodated inside the L-shaped plate 54 by the gravity, and the middle cavity of the U-shaped block 71 corresponds to the position of the indicator light 4, which can protect the indicator light 4 without affecting the operator's normal observation of it. When the high-voltage power supply is used, the gravity of the steel ball 73 can be used to make the U-shaped block 71 slide out through the support block 72 when the L-shaped plate 54 is flipped, so that the connecting line plugged into the high-voltage power supply input terminal 3 can be prevented from falling off and limited. At the same time, the sliding of the U-shaped block 71 will not affect the operator's normal observation of the indicator light 4, which is convenient for use.

[0090] Furthermore, an indicator light 4 is provided on one side of the power supply body 1 , and the indicator light 4 is located inside the groove. The display of the indicator light 4 can be used to determine whether the internal operation is normal.

[0091] High voltage output control method of the present invention:

[0092] Initialize GPIO configuration and preset values: initialize ADC, DAC, USART, GPIO, timer, HRTIM, DMA, I2C and EEPROM, preset a specific address of EEPROM to store communication data, and initialize the device address to 0x01;

[0093] Driving voltage: The high-precision timer HRTIM outputs two PWM waveforms with different phases to generate the corresponding voltage. The driving frequency is 48kHz. Different PWM duty cycles (0-45%) correspond to different voltages (0-10KV). The relationship between the duty cycle and voltage of the PWM waveform is similar to a downward-opening parabola, and the peak value is exactly at 45%.

[0094] Control algorithm: Use the incremental PID algorithm to control the voltage output voltage value, and use PID to achieve closed-loop control, where P refers to proportion, I refers to integration, and D refers to differentiation. The PID algorithm has two parameters: the set value and the current value, a total of two input quantities;

[0095] The incremental PID function is to calculate the increment required to use the current value to approach the set value;

[0096] For 010P: the set value is the voltage desired by the user, which is set by the user through 485 communication, or converted from the voltage of the potentiometer / analog input; the current value is the real voltage of the hardware output end, which is converted from the feedback voltage collected by the ADC;

[0097] The PID algorithm is used to obtain the duty cycle increment or decrement of the PWM waveform that controls the real voltage. The increment or decrement plus the current duty cycle is used to obtain the actual PWM duty cycle desired for the next cycle. This is used to control the voltage output and complete the closed-loop control. The specific formula is as follows: Fig. 9 As shown;

[0098] Calibration function: The hardware divides the feedback voltage to three ADCs. The three ADCs represent voltage ranges of 0-3333, 0-6666, and 0-10000 respectively. The three ADCs are calibrated separately. The measured actual output voltage is transmitted to the microcontroller through 485 communication. The measured actual voltage is compared with the current value calculated by the feedback value to obtain the function relationship. The proportional coefficient and other data of the function relationship are stored in the EEPROM through I2C control. The microcontroller reads a specific EEPROM address. If there is a value, the calibration is completed through arithmetic conversion.

[0099] DAC output: Use DAC driver to convert the current value into the corresponding voltage;

[0100] Communication function: transmit control information to the microcontroller through the industrial control screen, and display the feedback voltage on the screen;

[0101] LED light control: timer controls the flashing time, GPIO low level controls the lighting.

[0102] There are two ways to judge short circuit in short circuit protection. The first is that when the voltage has been adjusted to near the set voltage, but there is a sudden increase or decrease in voltage, and the increase or decrease ratio is about 30%, it is judged as a short circuit. The second is that the current value cannot approach the set value for more than 3s for a long time, which is judged as a short circuit.

[0103] The output voltage logic diagram of this high voltage power supply is as follows Fig.10 As shown;

[0104] The principle block diagram of this high voltage power supply is as follows Fig.11 As shown;

[0105] The interface schematic diagram of the DB9 plug is as follows: Fig.12 As shown, the main functions are 24V positive and negative power input and 485 communication connection port, and the main indicators are voltage input, high-voltage regulation signal input and high-voltage feedback signal output;

[0106] The DC\DC output schematic diagram is as follows Fig.13 As shown, the main functions are voltage input DC24V, reverse connection protection and DC\DC output, the main indicators are EMC processing, DC\DC output 5V / 1A. The output voltage can be adjusted by adjusting the R4 and R6 resistors, the voltage output formula is: (R4+R6 / R6)*0.8;

[0107] The high voltage abnormal fault detection principle diagram is as follows Fig.14 As shown, the main function is high-voltage short-circuit detection. The main indicator is the signal taken out from the voltage doubling circuit. When a short circuit occurs, the signal rises and turns on the transistor, so that the MCU triggers a short-circuit alarm when it detects 0.

[0108] The schematic diagram of the voltage doubler drive component is as follows Fig.15 and Fig.16 As shown, the main function is to use the voltage drive signal and PWM voltage doubling control signal to control the voltage doubling circuit to generate positive / negative high voltage. The main indicator is that the 24V voltage after EMC treatment is input to the TD1509 power chip and the fixed voltage for voltage doubling is output. The MCU controls the motor driver chip and uses the PWM signal to adjust the voltage doubling circuit. The PWM amplitude is the output voltage amplitude of the TD1509. In order to adapt to different transformers, the TD1509 output needs to be debugged and adapted to the corresponding circuit;

[0109] The schematic diagram of the positive / negative high voltage components is as follows Fig.17 As shown, the main function is positive high voltage output, which can change the output polarity of the diode to output negative high voltage. The main indicator is that the PWM full-bridge driver chip drives the primary end of the transformer to form a loop, and the output voltage can be adjusted by adjusting the duty cycle. The output voltage terminal is connected to the sampling resistor for ADC detection;

[0110] The schematic diagram of the 485 communication component is as follows Fig.18 As shown, the main function is 485 communication circuit, and the main indicators are input voltage 3.3V and 485 communication general circuit;

[0111] The schematic diagram of the high voltage sampling feedback component is as follows Fig.19 As shown, the main function is 3-way ADC detection. The main indicator is the high-voltage output after the ground resistor divider, followed by the operational amplifier, and amplified. The 3-way ADC detects the MCU for processing, and the input voltage and output voltage are calibrated. The calibrated detection value is stored in the EEPROM. According to the stored data, the high-voltage output is reversely adjusted through the real-time feedback value to make the output stable.

[0112] This high-voltage power supply achieves stable high-voltage output through hierarchical multi-channel detection, calibration data, and software algorithms, and the maximum error of 10KV voltage is less than 2V.

[0113] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable high-precision high-voltage power supply, comprising: A power supply body (1), wherein one side of the power supply body (1) is provided with an output end (2) and an input end (3); The feature is that a protective device is arranged outside the power source body (1), and the protective device comprises a telescopic mechanism (5), a sealing bearing mechanism (6) and a limiting mechanism (7); The telescopic mechanism (5) is arranged outside the power source body (1) and is used to seal the input end (3) and limit the position of the connection line with the output end (2). The telescopic mechanism (5) comprises: A sleeve (51), wherein the sleeve (51) is fixedly connected to an outer wall of the power source body (1); A telescopic rod (52), the telescopic rod (52) being parallel to the long side of the power source body (1) and being slidably interlaced with the inner cavity of the sleeve (51); A rotating block (53), wherein the outer wall of the telescopic rod (52) is provided with a rotating groove, the rotating block (53) is slidably interlaced with the inner cavity of the rotating groove, and the cross section of the rotating block (53) is T-shaped; An L-shaped plate (54), the L-shaped plate (54) being rotatably connected to the telescopic rod (52) via a rotating block (53), a sealing groove being provided at the bottom end of the L-shaped plate (54), and a groove being provided at the top end of the L-shaped plate (54); A positioning component (55), the positioning component (55) being arranged inside the L-shaped plate (54) and used for multi-point positioning of the L-shaped plate (54) and the telescopic rod (52); a limiting assembly (56), wherein the limiting assembly (56) is arranged inside the L-shaped plate (54); The sealing bearing mechanism (6) is arranged inside the sealing groove and is used for sealing the output end (2) and supporting a wire connected to the output end (2); The limiting mechanism (7) is arranged inside the groove and is used to limit the connection line of the input end (3).

2. The adjustable high-precision high-voltage power supply according to claim 1, characterized in that: The positioning component (55) comprises: A sliding block (551), wherein a sliding groove is provided at the bottom end of the L-shaped plate (54), the sliding block (551) is slidably interlaced with the inner cavity of the sliding groove, and the cross-sections of the sliding block (551) and the sliding groove are both T-shaped; A pulling block (552), the pulling block (552) being fixedly connected to the bottom end of the sliding block (551), the cross section of the pulling block (552) being triangular, a linkage groove being provided in the middle of the pulling block (552), the limiting assembly (56) being matched with the linkage groove; A positioning rod (553), wherein the outer wall of the rotating block (53) is provided with a through hole, and the inner wall of the sleeve (51) is provided with a plurality of positioning holes at equal intervals, one end of the positioning rod (553) is fixedly connected to the slider (551), and the other end of the positioning rod (553) passes through the through hole and is slidably connected to the inner cavity of the positioning hole; A first compression spring (554), wherein the first compression spring (554) is arranged inside the slide groove, one end of the first compression spring (554) is fixedly connected to the slider (551), and the other end of the first compression spring (554) is fixedly connected to the inner wall of the slide groove; A clamping assembly (555), wherein the clamping assembly (555) is arranged inside the positioning assembly (55).

3. The adjustable high-precision high-voltage power supply according to claim 2, characterized in that: The clamping assembly (555) comprises: A clamping rod (5551), a clamping groove is provided in the middle of the pull block (552), one end of the clamping rod (5551) is slidably inserted into the inner cavity of the clamping groove, and the other end of the clamping rod (5551) passes through the pull block (552) and is slidably inserted into the inner cavity of the linkage groove; Sliding blocks (5552), wherein a plurality of the sliding blocks (5552) are respectively fixedly connected to two sides of the clamping rod (5551), and sliding grooves are provided on both sides of the inner wall of the clamping groove, and the sliding blocks (5552) are slidably interlaced with the inner cavity of the sliding groove; A second compression spring (5553), wherein the second compression spring (5553) is arranged inside the sliding groove, one end of the second compression spring (5553) is fixedly connected to the sliding block (5552), and the other end of the second compression spring (5553) is fixedly connected to the inner wall of the sliding groove.

4. The adjustable high-precision high-voltage power supply according to claim 2, characterized in that: The limiting component (56) comprises: An extrusion plate (561), wherein a plurality of extrusion grooves are symmetrically provided inside the L-shaped plate (54) with the sealing groove as the center, and the extrusion plate (561) is slidably interlaced with the inner cavity of the extrusion groove; A limiting rod (562), wherein limiting grooves are provided on both sides of the inner wall of the sealing groove, one end of the limiting rod (562) is slidably interpenetratingly connected with the inner cavity of the limiting groove, and the limiting rod (562) is slidably interpenetratingly connected with the inner cavity of the extrusion plate (561); An extrusion block (563), wherein a plurality of the extrusion blocks (563) are respectively fixedly connected to two sides of the limiting rod (562), and an oblique groove is provided on both sides of the inner wall of the extrusion plate (561), and the extrusion block (563) is slidably interlaced with the inner cavity of the oblique groove; A connecting rope (564), wherein both ends of the connecting rope (564) are respectively fixedly connected to the plurality of extrusion plates (561); A linkage rod (565), one end of which is fixedly connected to one of the extrusion plates (561), and the linkage rod (565) cooperates with the inner cavity of the linkage groove; A third compression spring (566), wherein a plurality of the third compression springs (566) are respectively sleeved on the outside of the connecting rope (564) and the linkage rod (565), one end of the plurality of the third compression springs (566) are respectively fixedly connected to the plurality of extrusion plates (561), and the other end of the plurality of the third compression springs (566) are respectively fixedly connected to the inner walls of the plurality of extrusion grooves.

5. The adjustable high-precision high-voltage power supply according to claim 4, characterized in that: A C-shaped groove is provided between the plurality of extrusion grooves, a plurality of reversing wheels (567) are fixedly installed inside the C-shaped groove, the connecting rope (564) is located inside the C-shaped groove, and the connecting rope (564) cooperates with the plurality of reversing wheels (567).

6. The adjustable high-precision high-voltage power supply according to claim 4, characterized in that: The sealing bearing mechanism (6) comprises: A supporting plate (61), the supporting plate (61) being located inside the sealing groove, and limiting holes being provided on both sides of the supporting plate (61), and the other end of the limiting rod (562) being slidably interlaced with the inner cavity of the limiting hole; A sealing plug (62), the sealing plug (62) being fixedly connected to a side of the supporting plate (61) close to the power source body (1) and used for sealing the output end (2); A connecting plate (63), wherein a plurality of the connecting plates (63) are fixedly connected to the top of the supporting plate (61), a plurality of connecting grooves are equidistantly formed at the top of the inner wall of the sealing groove, and the connecting plates (63) are slidably interlaced with the inner cavity of the connecting groove; A plurality of rotating rods (64) are respectively fixedly connected to two sides of the connecting plate (63); two sides of the inner wall of the connecting groove are provided with transverse grooves; the rotating rods (64) are slidably connected with the inner cavity of the transverse groove.

7. The adjustable high-precision high-voltage power supply according to claim 1, characterized in that: The limiting mechanism (7) comprises: A U-shaped block (71), wherein the U-shaped block (71) is located inside the groove; Support blocks (72), wherein a plurality of the support blocks (72) are respectively fixedly connected to two sides of the U-shaped block (71), support grooves are provided on two sides of the inner wall of the groove, and the support blocks (72) are slidably interlaced with the inner cavity of the support grooves; Steel balls (73), wherein a U-shaped groove is provided inside the U-shaped block (71), and a plurality of the steel balls (73) are located inside the U-shaped groove; A partition plate (74) is fixedly connected to the center of the U-shaped groove, and the plurality of steel balls (73) are symmetrically arranged with the partition plate (74) as the center.

8. The adjustable high-precision high-voltage power supply according to claim 7, characterized in that: An indicator light (4) is provided on one side of the power source body (1), and the indicator light (4) is located inside the groove.

9. A high voltage output control method of an adjustable high-precision high voltage power supply according to any one of claims 1 to 8, characterized in that: The specific usage steps are as follows: Step 1: Initialize ADC, DAC, USART, GPIO, timer, HRTIM, DMA, I2C and EEPROM, preset a specific address of EEPROM to store communication data, and initialize the device address to 0x01; Step 2: Output two PWM waveforms with different phases through the high-precision timer HRTIM to generate the corresponding voltage; Step 3: Use the incremental PID algorithm to control the voltage output voltage value and use PID to achieve closed-loop control; Step 4: The hardware divides the feedback voltage to three ADCs and calibrates the three ADCs respectively. Then, the measured actual output voltage is transmitted to the MCU through 485 communication, and compared with the current value calculated by the feedback value to obtain the functional relationship. The proportional coefficient data of the functional relationship is stored in the EEPROM through I2C control, and the MCU reads the specific EEPROM address. Step 5: Use DAC driver to convert the current value into the corresponding voltage; Step 6: Transmit the control information to the microcontroller through the industrial control screen, and display the feedback voltage on the screen; Step 7: The timer controls the flashing time, and the GPIO low level controls the lighting.

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