LLC resonant converter

Abstract

The invention relates to the technical field of resonant converters, in particular to an LLC resonant converter, and solves the problems that when the LLC resonant converter is used, as the position of a wiring terminal is fixed, the position of the wiring terminal needs to be pulled according to the mounting position during mounting, the terminal is easy to break, an inductance element and a coil are difficult to take out, and the cost is high. The device comprises a shell assembly, an adjusting mechanism is arranged on the outer side of the bottom end of the shell assembly, and a baffle assembly is arranged on one side of the shell assembly. Two pushing plates are pressed towards the inner side at the same time, so that the pushing plates drive connecting plates to move in pushing grooves, then movable plates are driven to move in inserting grooves, the movable plates drive limiting plates to move out of the interiors of limiting grooves, and meanwhile fixing rods move out of the interiors of the inserting grooves; and therefore, the limiting of the limiting plate on the two half shells is relieved, and the two half shells can be separated towards the two sides, so that the two half shells can be conveniently overhauled.

Description

Technical Field

[0001] The present invention relates to the technical field of resonant converters, and in particular to an LLC resonant converter. Background Art

[0002] The LLC converter provides a form of a series resonant converter that provides an output voltage signal separated from an input signal. The LLC converter includes a series resonant circuit having a primary winding of a transformer. The switching circuit alternately couples the switching node of the resonant circuit or the energy storage circuit to a positive supply node and a ground node to provide an AC resonant current flowing through the primary winding of the transformer. A secondary circuit such as a rectifier provides an output voltage to drive a load. The secondary circuit may include a synchronous rectifier switch or a diode rectifier. The primary side switching circuit may be adjusted to regulate the output voltage. The LLC resonant converter has high efficiency and high power density, and can provide zero voltage switching and lower turn-off current for a wide load range for the primary side switch.

[0003] When using an existing LLC resonant converter, the position of the terminal is often fixed, so it is necessary to move the terminal according to the installation position during installation, which can easily cause the terminal to break. In addition, the inductor element and the coil are difficult to remove, making maintenance inconvenient. Therefore, it does not meet existing needs. We propose an LLC resonant converter. Summary of the invention

[0004] The object of the present invention is to provide an LLC resonant converter to solve the problems that the LLC resonant converter proposed in the above background technology is often in use, because the position of the terminal is fixed, it is necessary to move the position of the terminal according to the installation position during installation, which may easily lead to terminal breakage, and the inductor element and the coil are difficult to remove, making it inconvenient to carry out maintenance and processing.

[0005] To achieve the above object, the present invention provides the following technical solution: an LLC resonant converter, comprising a housing assembly, an adjusting mechanism is provided on the outer side of the bottom end of the housing assembly, a baffle assembly is provided on one side of the housing assembly, and a heat dissipation mechanism is provided inside the housing assembly;

[0006] The adjustment mechanism includes a power connection board, an adjustment screw rod, a sliding table, a wiring terminal and a marking plate. The power connection board is fixedly installed on one side of the bottom end of the housing assembly, and multiple adjustment screw rods are rotatably installed inside the bottom end of the power connection board. The outer surface of the adjustment screw rod is movably installed with a sliding table, and the bottom end of the sliding table is fixedly installed with a wiring terminal. One end of the adjustment screw rod is provided with a marking plate.

[0007] Preferably, the shell assembly includes a half shell, a heat dissipation window, a pushing plate, a connecting plate, a movable plate and a pushing groove, the top of the half shell is fixedly installed with a heat dissipation window, one side of the bottom end of the half shell is provided with a pushing groove, the other side of the bottom end of the half shell is provided with a plug-in groove, the inside of the pushing groove is slidably installed with a connecting plate, the bottom end of the connecting plate is fixedly installed with a pushing plate, the inner side of the connecting plate is fixedly installed with a movable plate, and the movable plate is slidably inserted into the inside of the plug-in groove at the bottom end of the other half shell.

[0008] Preferably, the shell assembly also includes a plug-in slot, a spring groove, a compression spring, a limit plate, a limit groove and a fixed rod. The inner side of the movable plate is fixedly installed with a limit plate, one side of the plug-in slot is provided with a limit groove, the inside of the push slot is fixedly installed with a fixed rod, the fixed rod is movably inserted into one side of the plug-in slot, one side of the surface of the fixed rod is provided with a spring groove, the limit plate is slidably inserted into the inside of the limit groove, and a compression spring is movably installed between the movable plate and the inside of the spring groove.

[0009] Preferably, the baffle assembly includes a baffle, a mounting rod, a mounting slot, an extrusion spring and a fixing plate, the baffle being movably mounted on one side surface of the semi-shell, fixing plates being fixedly mounted on both side surfaces of the baffle, mounting rods being fixedly mounted on one side of the fixing plate close to the semi-shell, mounting slots being provided at positions close to the mounting rods inside the semi-shell, the mounting rods being slidably inserted into the interior of the mounting slots, and extrusion springs being movably mounted on the outer surfaces of the mounting rods located inside the mounting slots.

[0010] Preferably, the heat dissipation mechanism includes an inductor element, a coil winding, a servo motor, a cooling fan, air guide holes and an installation cavity. An installation cavity is provided at a position between the interior of the semi-shell and the heat dissipation window. Three inductors are movably installed inside the installation cavity. The outer surfaces of the inductors are wound with coil windings. Multiple servo motors are provided inside the semi-shell. The output ends of the servo motors are connected to cooling fans through couplings. Multiple air guide holes are provided on the inner wall surface of the installation cavity near the cooling fan.

[0011] Preferably, a semi-groove is provided on one side surface of the baffle close to the inductor element, one end of the inductor element is inserted into the semi-groove, and the other end of the inductor element is inserted into the inner wall of the installation cavity.

[0012] Preferably, a plurality of heat dissipation openings are provided on the surface of the heat dissipation window.

[0013] Preferably, the sliding platform and the adjusting screw rod are connected via threads.

[0014] Preferably, a T-shaped plate is fixedly mounted on the bottom end of the baffle, and the T-shaped plate is inserted into the interior of the half shell from one side of the half shell.

[0015] Preferably, the lengths of the two push plates are consistent.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention cooperates with the movable plate and the limiting plate, so that when the device is in use, the two push plates can be pressed inward at the same time, so that the push plate drives the connecting plate to move inside the push slot, and then drives the movable plate to move inside the plug-in slot, so that the movable plate drives the limiting plate to move out of the limiting slot, and at the same time, the fixing rod moves out of the plug-in slot, thereby releasing the limiting of the two half shells by the limiting plate. At this time, the two half shells can be separated to both sides, so as to facilitate the maintenance of the two half shells;

[0018] 2. The present invention can block the inductor element through the cooperation of the mounting rod and the baffle plate to prevent the inductor element from shaking or falling off. After the two half shells are separated, the baffle plate can be pulled out from one side, so that the mounting rod moves to the outermost position inside the mounting groove. At this time, the inductor element can be pulled out from the inside of the mounting cavity, thereby facilitating the maintenance and replacement of the inductor element and the coil winding.

[0019] 3. The present invention cooperates with the adjusting screw and the sliding table so that when the device is in use, the marking plate can be rotated to drive the adjusting screw to rotate at the bottom end of the power board, thereby adjusting the position of the sliding table on the surface of the adjusting screw, and then adjusting the position of the terminal, so that the device can be convenient for connecting and installing electronic components such as circuit boards of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A cross-sectional front view of the present invention as a whole;

[0022] Figure 3 A sectional side view of the present invention as a whole;

[0023] Figure 4 A bottom cross-sectional view of the present invention as a whole;

[0024] Figure 5 It is a cross-sectional top view of the position of the limit plate of the present invention;

[0025] Figure 6 A cross-sectional top view of the mounting rod position of the present invention;

[0026] Figure 7 It is a cross-sectional side view of the baffle position of the present invention.

[0027] In the figure: 1. Shell assembly; 101. Half shell; 102. Heat dissipation window; 103. Push plate; 104. Connecting plate; 105. Movable plate; 106. Push slot; 107. Plug slot; 108. Spring groove; 109. Compression spring; 110. Limit plate; 111. Limit slot; 112. Fixing rod; 2. Baffle assembly; 201. Baffle; 202. Mounting rod; 203. Mounting slot; 204. Extrusion spring; 205. Fixing plate; 3. Adjustment mechanism; 301. Power board; 302. Adjustment screw rod; 303. Sliding table; 304. Terminal block; 305. Marking plate; 4. Heat dissipation mechanism; 401. Inductor; 402. Coil winding; 403. Servo motor; 404. Heat dissipation fan; 405. Air guide hole; 406. Mounting cavity. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figures 1 to 7 , an embodiment of the present invention: an LLC resonant converter, comprising a housing assembly 1, an adjusting mechanism 3 is provided on the outer side of the bottom end of the housing assembly 1, a baffle assembly 2 is provided on one side of the housing assembly 1, and a heat dissipation mechanism 4 is provided inside the housing assembly 1;

[0030] The adjustment mechanism 3 includes a power board 301, an adjustment screw rod 302, a sliding platform 303, a wiring terminal 304 and a marking plate 305. The power board 301 is fixedly installed on one side of the bottom end of the housing assembly 1. A plurality of adjustment screw rods 302 are rotatably installed inside the bottom end of the power board 301. The outer surface of the adjustment screw rod 302 is movably installed with a sliding platform 303. The bottom end of the sliding platform 303 is fixedly installed with a wiring terminal 304. One end of the adjustment screw rod 302 is provided with a marking plate 305.

[0031] By adjusting the cooperation between the screw rod 302 and the sliding platform 303, when the device is in use, the marking plate 305 can be rotated to make the marking plate 305 drive the adjusting screw rod 302 to rotate at the bottom end of the power board 301, thereby adjusting the position of the sliding platform 303 on the surface of the adjusting screw rod 302, and then adjusting the position of the terminal block 304, so that the device can be conveniently connected and installed to electronic components such as circuit boards of different sizes.

[0032] By setting the marking plate 305, when the device adjusts the position of the connecting terminal 304, the angle of the marking plate 305 can be checked, so that each connecting terminal 304 on the same side can be kept in a straight line, thereby avoiding deviation of the connecting terminal 304.

[0033] The shell assembly 1 includes a half shell 101, a heat dissipation window 102, a push plate 103, a connecting plate 104, a movable plate 105 and a push groove 106. The heat dissipation window 102 is fixedly installed on the top of the half shell 101, a push groove 106 is provided on one side of the bottom end of the half shell 101, and a plug-in groove 107 is provided on the other side of the bottom end of the half shell 101. The inside of the push groove 106 is slidably installed with a connecting plate 104, the bottom end of the connecting plate 104 is fixedly installed with a push plate 103, the inner side of the connecting plate 104 is fixedly installed with a movable plate 105, and the movable plate 105 is slidably inserted into the inside of the plug-in groove 107 at the bottom end of the other half shell 101.

[0034] The shell assembly 1 also includes a plug-in slot 107, a spring groove 108, a compression spring 109, a limit plate 110, a limit groove 111 and a fixed rod 112. The limit plate 110 is fixedly installed on the inner side of the movable plate 105, and a limit groove 111 is provided on one side inside the plug-in slot 107. A fixed rod 112 is fixedly installed inside the push slot 106. The fixed rod 112 is movably inserted into one side inside the plug-in slot 107. A spring groove 108 is provided on one side of the surface of the fixed rod 112. The limit plate 110 is slidably inserted into the inside of the limit groove 111, and a compression spring 109 is movably installed between the movable plate 105 and the inside of the spring groove 108.

[0035] Through the cooperation of the movable plate 105 and the limiting plate 110, when the device is in use, the two pushing plates 103 can be pressed inward at the same time, so that the pushing plate 103 drives the connecting plate 104 to move inside the pushing groove 106, and then drives the movable plate 105 to move inside the plug-in groove 107, so that the movable plate 105 drives the limiting plate 110 to move out from the inside of the limiting groove 111, and at the same time, the fixing rod 112 is moved out from the inside of the plug-in groove 107, thereby releasing the limiting of the two half-shells 101 by the limiting plate 110. At this time, the two half-shells 101 can be separated to both sides, so as to facilitate their maintenance.

[0036] The baffle assembly 2 includes a baffle 201, a mounting rod 202, a mounting groove 203, an extrusion spring 204 and a fixing plate 205. The baffle 201 is movably mounted on one side surface of the semi-shell 101, and the fixing plates 205 are fixedly mounted on both side surfaces of the baffle 201. The fixing rod 202 is fixedly mounted on one side of the fixing plate 205 close to the semi-shell 101. The semi-shell 101 is internally provided with a mounting groove 203 close to the mounting rod 202. The mounting rod 202 is slidably inserted into the interior of the mounting groove 203, and the outer surface of the mounting rod 202 located inside the mounting groove 203 is movably mounted with an extrusion spring 204.

[0037] By the cooperation between the mounting rod 202 and the baffle 201, the baffle 201 can block the inductor element 401 to prevent the inductor element 401 from shaking or falling off. After the two half shells 101 are separated, the baffle 201 can be pulled out from one side, so that the mounting rod 202 moves to the outermost position inside the mounting groove 203. At this time, the inductor element 401 can be pulled out from the inside of the mounting cavity 406, so as to facilitate the maintenance and replacement of the inductor element 401 and the coil winding 402.

[0038] The heat dissipation mechanism 4 includes an inductor element 401, a coil winding 402, a servo motor 403, a cooling fan 404, an air guide hole 405 and an installation cavity 406. An installation cavity 406 is provided at a position between the interior of the semi-shell 101 and the heat dissipation window 102. Three inductors 401 are movably installed inside the installation cavity 406. The outer surfaces of the inductors 401 are wound with coil windings 402. A plurality of servo motors 403 are provided inside the semi-shell 101. The output ends of the servo motors 403 are connected to the cooling fan 404 through couplings. A plurality of air guide holes 405 are provided on the inner wall surface of the installation cavity 406 near the cooling fan 404.

[0039] A semi-groove is provided on one side of the baffle 201 close to the inductor element 401 , one end of the inductor element 401 is inserted into the semi-groove, and the other end of the inductor element 401 is inserted into the inner wall of the installation cavity 406 .

[0040] The surface of the heat dissipation window 102 is provided with a plurality of heat dissipation openings.

[0041] The sliding platform 303 and the adjusting screw rod 302 are connected via threads.

[0042] A T-shaped plate is fixedly mounted on the bottom end of the baffle 201 , and the T-shaped plate is inserted into the interior of the half shell 101 from one side of the half shell 101 .

[0043] The lengths of the two push plates 103 are consistent.

[0044] When the LLC resonant converter is in use, the baffle 201 blocks the inductor element 401 to prevent the inductor element 401 from shaking or falling off;

[0045] Furthermore, the marking plate 305 can be rotated to drive the adjusting screw 302 to rotate at the bottom end of the power board 301, thereby adjusting the position of the sliding table 303 on the surface of the adjusting screw 302, and then adjusting the position of the terminal 304, so that the device can be conveniently connected and installed to electronic components such as circuit boards of different sizes;

[0046] At the same time, the servo motor 403 drives the cooling fan 404 to rotate, so that the cooling fan 404 accelerates the ventilation of the interior of the installation cavity 406 through the air guide hole 405, thereby improving the heat dissipation efficiency inside the installation cavity 406, and avoiding overheating and damage of the inductor element 401 and the coil winding 402. When it is necessary to maintain the parts of the device, the two pushing plates 103 can be pressed inward at the same time, so that the pushing plate 103 drives the connecting plate 104 to move inside the pushing groove 106, and then drives the movable plate 105 to move inside the plug-in groove 107, so that the movable plate 105 drives the limiting plate 110 to move out of the limiting groove 111, and at the same time, the fixing rod 112 is moved out of the plug-in groove 107, thereby releasing the limiting of the two half shells 101 by the limiting plate 110. At this time, the two half shells 101 can be separated to both sides, so as to facilitate the maintenance thereof.

[0047] After the two half shells 101 are separated, the baffle 201 can be pulled out from one side, so that the mounting rod 202 moves to the outermost position inside the mounting groove 203. At this time, the inductor element 401 can be pulled out from the inside of the mounting cavity 406, so as to facilitate the maintenance and replacement of the inductor element 401 and the coil winding 402.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An LLC resonant converter, comprising a housing assembly (1), characterized in that: An adjustment mechanism (3) is provided on the outer side of the bottom end of the shell assembly (1), a baffle assembly (2) is provided on one side of the shell assembly (1), and a heat dissipation mechanism (4) is provided inside the shell assembly (1); The adjustment mechanism (3) comprises a power connection board (301), an adjustment screw rod (302), a sliding platform (303), a connection terminal (304) and a marking plate (305); the power connection board (301) is fixedly mounted on one side of the bottom end of the housing assembly (1); a plurality of adjustment screw rods (302) are rotatably mounted inside the bottom end of the power connection board (301); a sliding platform (303) is movably mounted on the outer surface of the adjustment screw rod (302); a connection terminal (304) is fixedly mounted on the bottom end of the sliding platform (303); and a marking plate (305) is provided at one end of the adjustment screw rod (302).

2. The LLC resonant converter according to claim 1, characterized in that: The shell assembly (1) comprises a half shell (101), a heat dissipation window (102), a push plate (103), a connecting plate (104), a movable plate (105) and a push groove (106); the heat dissipation window (102) is fixedly mounted on the top of the half shell (101); a push groove (106) is provided on one side of the bottom end of the half shell (101); a plug groove (107) is provided on the other side of the bottom end of the half shell (101); a connecting plate (104) is slidably mounted inside the push groove (106); a push plate (103) is fixedly mounted on the bottom end of the connecting plate (104); a movable plate (105) is fixedly mounted on the inner side of the connecting plate (104); and the movable plate (105) is slidably inserted into the plug groove (107) at the bottom end of the other half shell (101).

3. An LLC resonant converter according to claim 2, characterized in that: The housing assembly (1) further comprises a plug-in slot (107), a spring groove (108), a compression spring (109), a limit plate (110), a limit groove (111) and a fixed rod (112); the limit plate (110) is fixedly installed on the inner side of the movable plate (105); a limit groove (111) is provided on one side inside the plug-in slot (107); a fixed rod (112) is fixedly installed inside the push slot (106); the fixed rod (112) is movably inserted into one side inside the plug-in slot (107); a spring groove (108) is provided on one side of the surface of the fixed rod (112); the limit plate (110) is slidably inserted into the inside of the limit groove (111); and a compression spring (109) is movably installed between the movable plate (105) and the inside of the spring groove (108).

4. The LLC resonant converter according to claim 3, characterized in that: The baffle assembly (2) comprises a baffle (201), a mounting rod (202), a mounting groove (203), a compression spring (204) and a fixing plate (205); the baffle (201) is movably mounted on a side surface of the semi-shell (101); the fixing plates (205) are fixedly mounted on both side surfaces of the baffle (201); the side of the fixing plate (205) close to the semi-shell (101) is fixedly mounted with a mounting rod (202); the inside of the semi-shell (101) is provided with a mounting groove (203) close to the mounting rod (202); the mounting rod (202) is slidably inserted into the inside of the mounting groove (203); and the outer surface of the mounting rod (202) located inside the mounting groove (203) is movably mounted with a compression spring (204).

5. The LLC resonant converter according to claim 4, characterized in that: The heat dissipation mechanism (4) comprises an inductor element (401), a coil winding (402), a servo motor (403), a heat dissipation fan (404), an air guide hole (405) and an installation cavity (406); an installation cavity (406) is provided at a position between the interior of the half shell (101) and the heat dissipation window (102); three inductors (401) are movably installed inside the installation cavity (406); the outer surfaces of the inductors (401) are wound with coil windings (402); a plurality of servo motors (403) are provided inside the half shell (101); the output ends of the servo motors (403) are connected to the heat dissipation fan (404) via couplings; and a plurality of air guide holes (405) are provided on the inner wall surface of the installation cavity (406) near the heat dissipation fan (404).

6. The LLC resonant converter according to claim 5, characterized in that: A semi-groove is provided on a surface of one side of the baffle (201) close to the inductor element (401), one end of the inductor element (401) is inserted into the interior of the semi-groove, and the other end of the inductor element (401) is inserted into the interior of the inner wall of the installation cavity (406).

7. The LLC resonant converter according to claim 3, characterized in that: The surface of the heat dissipation window (102) is provided with a plurality of heat dissipation openings.

8. The LLC resonant converter according to claim 1, characterized in that: The sliding platform (303) and the adjusting screw rod (302) are connected via threads.

9. The LLC resonant converter according to claim 4, characterized in that: A T-shaped plate is fixedly mounted on the bottom end of the baffle (201), and the T-shaped plate is inserted into the interior of the half shell (101) from one side of the half shell (101).

10. The LLC resonant converter according to claim 3, characterized in that: The lengths of the two pushing plates (103) are consistent.

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