Magnetic leakage transformer
By adding a leakage magnetic sheet to the transformer, the high-frequency components are filtered out using the leakage inductance electromotive force, thus solving the high-frequency harmonic problem caused by the switching of power electronic devices and achieving savings in circuit size and cost.
Patent Information
- Application Number
- CN202422506056.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-10-16
AI Technical Summary
In existing power frequency UPS inverter circuits, the switching of power electronic devices generates high-frequency harmonics, increasing system power loss and interference. Furthermore, reactors need to be installed to filter out high-frequency components, increasing circuit size and cost.
By using a leakage transformer, high-frequency components are filtered out by adding leakage elements to the transformer, reducing the need for additional reactors in the circuit. The current generated by the leakage inductance electromotive force is used to filter out high-frequency components, thus reducing the circuit size.
It effectively filters out high-frequency components, reduces circuit size and cost, while maintaining power quality and avoiding the use of reactors.
Smart Images
Figure CN223638208U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field especially relates to a leakage transformer. BACKGROUND
[0002] In the power frequency UPS inverter circuit, when the power grid fails or power failure, UPS inverter switches to battery pack power supply mode, when the battery pack power supply, through the inverter converts DC into AC, and then after voltage regulation by the transformer, the power supply is carried out to the electric appliance.
[0003] The inverter usually uses power electronic devices IGBT, MOSFET etc., these devices when switching, due to its nonlinear characteristics, voltage and current will produce rapid change, this rapid change will lead to voltage and current waveform to appear discontinuous peak and steep edge, and these peak and steep edge contains high frequency component, that is, harmonic; Harmonic can lead to voltage and current distortion, increase the power loss of system, reduce the efficiency of system, even to other equipment produce interference and damage.
[0004] In actual operation and operation, usually install the reactor in front of the transformer, for filtering high frequency component, guarantee the power quality and safety of transformer output, but, this method increases the volume and cost of circuit. UTILITY MODEL CONTENTS
[0005] The utility model discloses in order to solve the existing circuit needs to install the reactor to filter high frequency component, lead to the shortcoming of large circuit volume, propose a leakage transformer, through increasing transformer leakage inductance, filter high frequency component in the circuit, install the reactor in the circuit to reduce the circuit volume.
[0006] In order to achieve the above object, the utility model adopts the following technical scheme:
[0007] A leakage transformer, including core body, primary coil and secondary coil, the core body includes three core columns, and upper and lower iron yokes arranged, three core columns are arranged in a straight line and fixedly connected between upper and lower iron yokes, and the secondary coil and the primary coil are respectively sleeved on the upper and lower ends of the core column, the transformer further includes leakage sheet, and the leakage sheet is arranged between any two adjacent core columns, and the primary coil and the secondary coil are clamped on the upper and lower sides of the leakage sheet.
[0008] Through the above setting, the leakage sheet is fixed between the two adjacent core columns through the primary coil and the secondary coil, and the leakage sheet increases the leakage of the transformer, filters high frequency component in the circuit, and installs the reactor in the circuit to reduce the circuit volume.
[0009] The core, the primary coil and the secondary coil of the present application can refer to the existing three-phase transformer, and a magnetic leakage sheet is arranged on the opposite sides of the middle core column, and the magnetic sheet is stably clamped by the primary coil and the secondary coil; when the transformer operates, the magnetic flux is not completely concentrated in the core, and part of the magnetic flux will generate magnetic leakage through air or other non-core materials, which will excite the leakage inductance electromotive force, thereby generating a certain current, and the energy generated by the current will not participate in energy transmission, so it belongs to the reactive power; and the electric reactor also does not participate in energy transmission in the circuit, and also belongs to the reactive power element. The magnetic flux generated by the three core columns in the present application is guided by the magnetic leakage sheet to generate more magnetic leakage flux, thereby reducing the main magnetic flux in the core column, and the inductance generated by the transformer is basically the same as the inductance of the circuit when the electric reactor is installed, thereby filtering out the high-frequency components in the circuit to achieve the goal of saving the electric reactor.
[0010] Further, the isolation plate is arranged between the primary coil and the lower yoke, and between the secondary coil and the upper yoke.
[0011] Through the above arrangement, the safety distance between the primary coil and the lower yoke is increased, and the safety distance between the secondary coil and the upper yoke is increased.
[0012] Further, the isolation plate is arranged between the adjacent two core columns, and the upper isolation plate is pressed on the upper side of the secondary coil by the upper yoke, and the lower isolation plate is pressed on the lower side of the primary coil by the lower yoke.
[0013] Through the above arrangement, the installation of the isolation plate is facilitated.
[0014] Further, the core includes upper silicon steel sheets, inverted mountain-shaped silicon steel sheets, mountain-shaped silicon steel sheets and lower silicon steel sheets, the upper silicon steel sheets and the inverted mountain-shaped silicon steel sheets are stacked at the upper end to form the upper yoke, the inverted mountain-shaped silicon steel sheets are tightly stacked with the upper end of the mountain-shaped silicon steel sheets to form three core columns, and the lower silicon steel sheets are stacked with the lower end of the mountain-shaped silicon steel sheets to form the lower yoke.
[0015] Through the above arrangement, the assembly of the transformer is facilitated.
[0016] Further, the transformer further includes upper clamping plates arranged on the opposite sides of the upper yoke, and lower clamping plates arranged on the opposite sides of the lower yoke, the upper clamping plates are clamped on the upper yoke by upper fasteners, and the lower clamping plates are clamped on the lower yoke by lower fasteners.
[0017] Further, the upper clamping plate is provided with a lifting hole.
[0018] Through the above arrangement, the transformer is hoisted and transported.
[0019] Further, the upper clamp plate is provided with an upper through hole, the upper yoke is provided with an upper connecting hole, and the upper fastener passes through the upper through hole and the upper connecting hole to clamp the upper yoke by the upper clamp plate.
[0020] Through the above arrangement, the upper fastener passes through the upper clamp plate and the upper yoke through the upper through hole and the upper connecting hole to press the upper clamp plate on the upper yoke; the lower fastener passes through the lower clamp plate and the lower yoke through the lower through hole and the lower connecting hole to press the lower clamp plate on the lower yoke.
[0021] Further, the transformer further comprises an upper pressure isolation plate and an upper insulation sleeve, the upper pressure isolation plate is arranged between the upper yoke and the upper clamp plate, the upper insulation sleeve is sleeved on the upper fastener and at least partially extends into the upper connecting hole, and the transformer further comprises a lower pressure isolation plate and a lower insulation sleeve, the lower pressure isolation plate is arranged between the lower yoke and the lower clamp plate, and the lower insulation sleeve is sleeved on the lower fastener and at least partially extends into the lower connecting hole.
[0022] Through the above arrangement, the short circuit between the core and the upper clamp plate and the short circuit between the core and the lower clamp plate are prevented.
[0023] Further, the primary coil comprises a primary framework sleeved on the core column, a primary coil body wound on the primary framework, and a primary insulation paper wrapped outside the primary coil body; the secondary coil comprises a secondary framework sleeved on the core column, a secondary coil body wound on the secondary framework, and a secondary insulation paper wrapped outside the secondary coil body; and the primary framework and the secondary framework clamp the magnetic leakage sheet. BRIEF DESCRIPTION OF DRAWINGS
[0024] Fig. 1 The schematic view of the transformer of the embodiment.
[0025] Fig. 2 The exploded view of the transformer of the embodiment. DETAILED DESCRIPTION
[0026] The technical scheme of the utility model will be further specifically explained below by taking an embodiment and in combination with the drawings.
[0027] As shown in Figs. 1-2 Fig. 1, a magnetic leakage transformer comprises a core, a primary coil 3 and a secondary coil 4, the core comprises three core columns, an upper yoke and a lower yoke arranged above and below, the three core columns are arranged in a straight line and fixedly connected between the upper yoke and the lower yoke, the secondary coil 4 and the primary coil 3 are sleeved on the upper and lower ends of the core columns, the transformer further comprises a magnetic leakage sheet 5, the magnetic leakage sheet 5 is arranged between any two adjacent core columns, and the primary coil 3 and the secondary coil 4 clamp the magnetic leakage sheet 5 on the upper and lower sides.
[0028] Through the above setting, the magnetic leakage sheet 5 is fixed between the two adjacent core columns by the primary coil 3 and the secondary coil 4, the magnetic leakage sheet 5 increases the transformer leakage magnetic, filters the high frequency components in the circuit, and the additional reactor in the circuit reduces the volume of the circuit.
[0029] The core, the primary coil 3 and the secondary coil 4 of the present application can refer to the existing three-phase transformer, and one magnetic leakage sheet 5 is arranged on the opposite side of the middle core column, and the magnetic sheet is stably clamped by the primary coil 3 and the secondary coil 4; during the operation of the transformer, the magnetic flux is not completely concentrated in the core, and part of the magnetic flux will generate leakage magnetic through the air or other non-core materials, which will excite the leakage inductance electromotive force, thereby generating a certain current, and the current will generate a certain energy, and this part of the energy does not participate in energy transmission, so it belongs to the reactive power; and the reactor in the circuit is also a power quality improvement element, which does not participate in energy transmission, and also belongs to the reactive power element. The magnetic flux generated by the three core columns in the present application is guided by the magnetic leakage sheet 5 to generate more leakage magnetic flux, thereby reducing the main magnetic flux in the core column, and the inductance generated is basically the same as the inductance of the circuit when the reactor is installed, thereby filtering the high frequency components in the circuit to achieve the goal of saving the reactor.
[0030] As an implementation manner, the isolation plate 6 is arranged between the primary coil 3 and the lower yoke, and between the secondary coil 4 and the upper yoke.
[0031] Through the above setting, the safety distance between the primary coil 3 and the lower yoke is increased, and the safety distance between the secondary coil 4 and the upper yoke is increased.
[0032] As an implementation manner, the isolation plate 6 is arranged between the two adjacent core columns, the upper isolation plate 6 is pressed on the upper side of the secondary coil 4 by the upper yoke, and the lower isolation plate 6 is pressed on the lower side of the primary coil 3 by the lower yoke.
[0033] Through the above setting, the installation of the isolation plate 6 is facilitated.
[0034] The isolation plate of the present application is basically a rectangular plate structure, and each of the opposite sides of the upper and lower ends of the middle core column is provided with one isolation plate 6.
[0035] As an implementation manner, the core includes an upper silicon steel sheet 7, an inverted mountain-shaped silicon steel sheet 98, a mountain-shaped silicon steel sheet 9 and a lower silicon steel sheet 10, the upper silicon steel sheet 7 and the upper end of the inverted mountain-shaped silicon steel sheet 98 are stacked to form an upper yoke, the lower end of the inverted mountain-shaped silicon steel sheet 98 and the upper end of the mountain-shaped silicon steel sheet 9 are stacked to form three core columns in close cooperation, and the lower silicon steel sheet 10 and the lower end of the mountain-shaped silicon steel sheet 9 are stacked to form a lower yoke.
[0036] Through the above setting, the assembly of the transformer is facilitated.
[0037] The core material of the present application is silicon steel, the upper silicon steel sheet 7, the lower silicon steel sheet 10, the silicon steel sheet 9 in the shape of mountain and the silicon steel sheet 98 in the shape of inverted mountain have the same thickness, which is 0.5 mm. The silicon steel sheet 9 in the shape of mountain is in the shape of mountain, with the lower side being horizontal and the upper end forming three branches. The silicon steel sheet 98 in the shape of inverted mountain is in the shape of inverted mountain, with the upper side being horizontal and the lower end forming three branches. The three branches of the upper end of the silicon steel sheet 9 in the shape of mountain and the three branches of the lower end of the silicon steel sheet 98 in the shape of inverted mountain are stacked together to form three core columns. The upper silicon steel sheet 7 is inserted between the upper ends of the silicon steel sheet 98 in the shape of inverted mountain and locked together. The lower silicon steel sheet 10 is inserted between the lower ends of the silicon steel sheet 9 in the shape of mountain and locked together to form the core.
[0038] As an implementation manner, the transformer further comprises upper clamping plates 11 arranged on the opposite sides of the upper yoke and lower clamping plates 12 arranged on the opposite sides of the lower yoke. The upper clamping plates 11 are clamped on the upper yoke through upper fasteners 13. The lower clamping plates 12 are clamped on the lower yoke through lower fasteners 14.
[0039] When the upper clamping plates 11 clamp the upper yoke, the upper end of the silicon steel sheet 98 in the shape of inverted mountain and the upper silicon steel sheet 7 are pressed together. When the lower clamping plates 12 clamp the lower yoke, the lower end of the silicon steel sheet 9 in the shape of mountain and the lower silicon steel sheet 10 are pressed together. At this time, the three branches of the silicon steel sheet 9 in the shape of mountain and the three branches of the silicon steel sheet 98 in the shape of inverted mountain are tightly matched with each other.
[0040] As an implementation manner, the upper clamping plates 11 are provided with lifting holes 15.
[0041] Through the above arrangement, the transformer is convenient to lift and carry.
[0042] As an implementation manner, the upper clamping plates 11 are provided with upper through holes 16, the upper yoke is provided with upper connecting holes 17, the upper fasteners 13 pass through the upper through holes 16 and the upper connecting holes 17 to clamp the upper clamping plates 11 on the upper yoke. The lower clamping plates 12 are provided with lower through holes 18, the lower yoke is provided with lower connecting holes 19, and the lower fasteners 14 pass through the lower through holes 18 and the lower connecting holes 19 to clamp the lower clamping plates 12 on the lower yoke.
[0043] Through the above arrangement, the upper fasteners 13 pass through the upper clamping plates 11 and the upper yoke through the upper through holes 16 and the upper connecting holes 17 to press the upper clamping plates 11 on the upper yoke. The lower fasteners 14 pass through the lower clamping plates 12 and the lower yoke through the lower through holes 18 and the lower connecting holes 19 to press the lower clamping plates 12 on the lower yoke.
[0044] The upper connecting hole 17 in the application penetrates the upper end of the upper silicon steel sheet 7 and the inverted mountain-shaped silicon steel sheet 98, the lower connecting hole 19 penetrates the lower end of the lower silicon steel sheet 10 and the mountain-shaped silicon steel sheet 9, the upper fastener 13 and the lower fastener 14 can adopt a screw rod structure, when tightened, the upper clamping plate 11, the upper silicon steel sheet 7 and the upper end of the inverted mountain-shaped silicon steel sheet 98 are locked together, and the lower clamping plate 12, the lower silicon steel sheet 10 and the lower end of the mountain-shaped silicon steel sheet 9 are locked together.
[0045] As an implementation manner, the transformer further comprises an upper pressure isolation plate 20 and an upper insulating sleeve 21, the upper pressure isolation plate 20 is arranged between the upper yoke and the upper clamping plate 11, the upper insulating sleeve 21 is sleeved on the upper fastener 13 and at least partially extends into the upper connecting hole 17, and the transformer further comprises a lower pressure isolation plate 22 and a lower insulating sleeve 23, the lower pressure isolation plate 22 is arranged between the lower yoke and the lower clamping plate 12, and the lower insulating sleeve 23 is sleeved on the lower fastener 14 and at least partially extends into the lower connecting hole 19.
[0046] Through the above arrangement, short circuits between the core and the upper clamping plate 11 and between the core and the lower clamping plate 12 are prevented.
[0047] The upper pressure isolation plate 20 of the application separates the upper clamping plate 11 from the upper yoke, the lower pressure isolation plate 22 separates the lower clamping plate 12 from the lower yoke, the upper insulating sleeve 21 separates the upper fastener 13 from the upper yoke, and the lower insulating sleeve 23 separates the lower fastener 14 from the lower yoke.
[0048] As an implementation manner, the primary coil 3 comprises a primary skeleton 31 sleeved on the core column, a primary coil body 32 wound on the primary skeleton 31, and a primary insulating paper 33 wrapped outside the primary coil body 32; the secondary coil 4 comprises a secondary skeleton 41 sleeved on the core column, a secondary coil body 42 wound on the secondary skeleton 41, and a secondary insulating paper 43 wrapped outside the secondary coil body 42; the primary skeleton 31 and the secondary skeleton 41 hold the magnetic flux leakage sheet 5.
[0049] It should be understood that for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.
Claims
1. A magnetic flux leakage transformer, characterized in that The transformer comprises a core, a primary coil and a secondary coil, the core comprises three core columns and upper and lower upper and lower iron yokes, the three core columns are arranged in a straight line and fixedly connected between the upper and lower iron yokes, the secondary coil and the primary coil are sleeved on the upper and lower ends of the core columns respectively, and the transformer further comprises magnetic leakage sheets, the magnetic leakage sheets are arranged between any two adjacent core columns, and the primary coil and the secondary coil clamp the upper and lower sides of the magnetic leakage sheets.
2. A magnetic flux leakage transformer according to claim 1, characterised in that Isolation plates are arranged between the primary coil and the lower iron yoke and between the secondary coil and the upper iron yoke.
3. A magnetic flux leakage transformer according to claim 2, characterised in that The isolation plates are arranged between two adjacent core columns, the upper isolation plates are pressed on the upper side of the secondary coil by the upper iron yoke, and the lower isolation plates are pressed on the lower side of the primary coil by the lower iron yoke.
4. A magnetic flux leakage transformer according to claim 1, characterized in that The core comprises upper silicon steel sheets, inverted mountain-shaped silicon steel sheets, mountain-shaped silicon steel sheets and lower silicon steel sheets, the upper silicon steel sheets and the upper ends of the inverted mountain-shaped silicon steel sheets are stacked to form the upper iron yoke, the lower ends of the inverted mountain-shaped silicon steel sheets and the upper ends of the mountain-shaped silicon steel sheets are tightly stacked to form the three core columns, and the lower silicon steel sheets and the lower ends of the mountain-shaped silicon steel sheets are stacked to form the lower iron yoke.
5. A magnetic flux leakage transformer according to claim 1, characterized in that The transformer further comprises upper clamping plates arranged on the opposite sides of the upper iron yoke and lower clamping plates arranged on the opposite sides of the lower iron yoke, the upper clamping plates are clamped on the upper iron yoke by upper fasteners, and the lower clamping plates are clamped on the lower iron yoke by lower fasteners.
6. A magnetic flux leakage transformer according to claim 5, characterised in that The upper clamping plates are provided with lifting holes.
7. A magnetic flux leakage transformer according to claim 5, characterised in that The upper clamping plates are provided with upper through holes, the upper iron yoke is provided with upper connecting holes, the upper fasteners pass through the upper through holes and the upper connecting holes to enable the upper clamping plates to clamp the upper iron yoke. The lower clamping plates are provided with lower through holes, the lower iron yoke is provided with lower connecting holes, and the lower fasteners pass through the lower through holes and the lower connecting holes to enable the lower clamping plates to clamp the lower iron yoke.
8. A magnetic flux leakage transformer according to claim 7, characterised in that The transformer further comprises upper pressure isolation plates and upper insulating sleeves, the upper pressure isolation plates are arranged between the upper iron yoke and the upper clamping plates, the upper insulating sleeves are sleeved on the upper fasteners and at least partially extend into the upper connecting holes, the transformer further comprises lower pressure isolation plates and lower insulating sleeves, the lower pressure isolation plates are arranged between the lower iron yoke and the lower clamping plates, and the lower insulating sleeves are sleeved on the lower fasteners and at least partially extend into the lower connecting holes.
9. A magnetic flux leakage transformer according to claim 1, characterized in that The primary coil comprises a primary framework sleeved on a core column, a primary coil body wound on the primary framework and primary insulating paper wrapped outside the primary coil body, the secondary coil comprises a secondary framework sleeved on the core column, a secondary coil body wound on the secondary framework and secondary insulating paper wrapped outside the secondary coil body, and the primary framework and the secondary framework clamp the magnetic leakage sheets.