CN210110488U

CN210110488U - Special filter transformer for PWM waveform

Info

Publication number: CN210110488U
Application number: CN201921400333.8U
Authority: CN
Inventors: 任贵林; 叶剑桥; 任琪
Original assignee: Satons (shanghai) Power Supply Co Ltd
Current assignee: Satons (shanghai) Power Supply Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-02-21
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses a special filter transformer of PWM waveform, including input winding and frame, the inboard of input winding is provided with output winding, and output winding's both sides install the epoxy interlayer, the middle part of epoxy interlayer is provided with the isolation layer, the support is installed on input winding's top, the frame sets up in the top of support, the internal distribution of frame has the backing plate, and the inside middle part of backing plate is connected with fastening bolt, the iron core has been settled to the inboard of frame. This special filter transformer of PWM wave form can dismantle the fastening bolt between frame and the backing plate, and convenient to use person changes the maintenance to the iron core between frame and the backing plate, helps the user to carry out fixed mounting to filter transformer, adopts single transformer to constitute filtering circuit with the electric capacity simultaneously, almost need not complicated control circuit, has reduced under the prerequisite of dead center, has reduced manufacturing cost, is convenient for maintain filter transformer's inner structure.

Description

Special filter transformer for PWM waveform

Technical Field

The utility model relates to a filter transformer technical field specifically is a special filter transformer of PWM waveform.

Background

With the development of new energy industry, a large amount of emerging energy sources such as wind power, solar energy and the like are utilized, supporting equipment is widely adopted and provided with a filter transformer, but the converted power of the energy sources cannot be directly utilized, so that the inverter power supply industry is derived, a DC-AC subject scheme is diversified in an inverter system, a complex filter circuit is basically and largely applied to the DC-AC scheme to ensure the normal application of continuous power and the use of high-density electrical elements, but the general scheme is complex and has a high fault rate, so that the filter transformer needs to be improved.

When the filter transformer in the market is used, a large number of complex filter circuits are basically applied to the existing DC-AC scheme to ensure the normal application of continuous power, but the use of high-density electrical elements also increases the fault points of the circuit, the service life is not high generally, the later maintenance is complex and the like (the popularization rate is not high due to the fact that the later maintenance is violated with the energy-saving policy advocated by the state).

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a special filter transformer of PWM waveform to solve the filter transformer in use on the market that proposes in the above-mentioned background art, complicated filter circuit has been used in a large amount basically to current DC-AC scheme, guarantees the normal application of continuing electric power, but the electric elements's of high density use, also increases the fault point of circuit, and general life is not high, the problem of later maintenance complicacy etc. (the energy-conserving policy of advocating with the country is violated mutually, so the prevalence is not high).

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a special filter transformer of PWM wave form, includes input winding and frame, the inboard of input winding is provided with output winding, and output winding's both sides install the epoxy interlayer, the middle part of epoxy interlayer is provided with the isolation layer, the support is installed on input winding's top, the frame sets up in the top of support, the internal distribution of frame has the backing plate, and the inside middle part of backing plate is connected with fastening bolt, the iron core has been settled to the inboard of frame, the foot rest is installed to input winding's bottom.

Preferably, the inner wall of the input winding is tightly attached to the outer wall of the epoxy interlayer, and the epoxy interlayer is movably connected with the output winding.

Preferably, the input winding is fixedly connected with the bracket, and the bracket and the frame are in a vertical structure.

Preferably, the frame is movably connected with the backing plate, and the frame and the fastening bolt form a thread structure through the backing plate.

Preferably, the central axis between the input winding and the iron core is crossed, and the iron core is fixedly connected with the foot rest.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a closely laminate between the inside inner wall of input winding and the outside of epoxy interlayer, and be swing joint between epoxy interlayer and the output winding, can reduce the coupling area between input winding and the output winding, increase the primary and secondary winding and leak the inductance, cooperate corresponding electric capacity, can filter out most harmonic in the system, play the safety in utilization of protection rear end electrical apparatus;

2. the utility model discloses a be swing joint between frame and the backing plate, and the frame passes through the backing plate and constitutes the helicitic texture with fastening bolt, can dismantle the fastening bolt between frame and the backing plate, and convenient to use person changes the maintenance to the iron core between frame and the backing plate, helps the user to carry out fixed mounting to filter transformer, adopts single transformer to add the electric capacity to constitute the filtering circuit simultaneously, hardly need complicated control circuit, under the prerequisite that has reduced the dead pixel, has reduced manufacturing cost, is convenient for maintain filter transformer's inner structure;

3. the utility model discloses an axis between input winding and the iron core is crossing, and is fixed connection between iron core and the foot rest, can simply slide complicated filter circuit, is favorable to guaranteeing the normal application of continuous electric power, reduces the electric elements's of high density service failure, helps improving power utilization rate height, reduces the running cost, has improved the operational safety nature, and the fault rate is low, reduces extravagantly, energy-concerving and environment-protective.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a right side view of the structure of the present invention;

fig. 3 is a schematic diagram of the circuit operation of the present invention.

In the figure: 1. an input winding; 2. an epoxy interlayer; 3. an output winding; 4. a support; 5. a frame; 6. a base plate; 7. an isolation layer; 8. an iron core; 9. fastening a bolt; 10. a foot rest.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a special filter transformer for PWM waveforms comprises an input winding 1 and a frame 5, wherein an output winding 3 is arranged on the inner side of the input winding 1, epoxy interlayers 2 are arranged on two sides of the output winding 3, an isolation layer 7 is arranged in the middle of the epoxy interlayer 2, the inner wall of the input winding 1 is tightly attached to the outer wall of the epoxy interlayer 2, the epoxy interlayer 2 is movably connected with the output winding 3, the epoxy interlayer 2 and the isolation layer 7 between the input winding 1 and the output winding 3 are protected between the input winding 1 and the output winding 3, the epoxy interlayer 2 and the isolation layer 7 are distinguished between the frame 4 and the frame 5, the coupling area between the input winding 1 and the output winding 3 can be reduced, the primary and secondary winding inter-leakage inductance is increased, the corresponding capacitance is matched, most of harmonic waves in a system can be filtered, and the use safety of rear-end electric appliances is protected, the top end of the input winding 1 is provided with a support 4, the frame 5 is arranged at the top of the support 4, the input winding 1 is fixedly connected with the support 4, and a vertical structure is arranged between the support 4 and the frame 5.

The inner part of the frame 5 is distributed with a backing plate 6, the middle part of the inner part of the backing plate 6 is connected with a fastening bolt 9, the inner side of the frame 5 is provided with an iron core 8, the bottom end of the input winding 1 is provided with a foot rest 10, the frame 5 is movably connected with the backing plate 6, the frame 5 forms a thread structure with the fastening bolt 9 through the backing plate 6, the iron core 8 can be arranged between the input winding 1 and the output winding 3 through the iron core 8 between the frame 5 and the backing plate 6, so that the foot rest 10 and the frame 5 are fixed between the input winding 1 and the output winding 3, the epoxy interlayer 2 and the isolation layer 7 can be arranged in the iron core, a complex and complex filter circuit can simply slide, the normal application of continuous power is ensured, the use fault of high-density electrical elements is reduced, the high utilization rate of a power supply is improved, the running cost is, reducing waste, saving energy and protecting environment.

The working principle is as follows: when the special filter transformer for PWM waveform is used, firstly, the filter transformer is input by 50HZPWM waveform when working, after being processed by an AC filter capacitor, 50HZPWM sine waveform is output to realize a working circuit process, the fastening bolt 9 between the frame 5 and the backing plate 6 is screwed, so that the thread of the fastening bolt 9 moves between the frame 5 and the backing plate 6, the connection between the frame 5 and the backing plate 6 can be loosened, the fastening bolt 9 between the frame 5 and the backing plate 6 can be disassembled, a user can conveniently replace and maintain the iron core 8 between the frame 5 and the backing plate 6, the filter transformer is favorably and fixedly installed by the user, meanwhile, a single transformer is adopted to add capacitor to form a filter loop, a complex control circuit is hardly used, the manufacturing cost is reduced on the premise of reducing dead spots, the internal structure of the filter transformer is convenient to maintain, meanwhile, the iron core 8 between the frame 5 and the backing plate 6 can install the iron core 8 between the input winding 1 and the output winding 3, so that the foot rest 10 and the frame 5 are fixed between the input winding 1 and the output winding 3, the epoxy interlayer 2 and the isolation layer 7 can be installed therein, a complex and complex filter circuit can simply slide, the normal application of continuous power is ensured, the use faults of high-density electrical elements are reduced, the high power utilization rate is improved, the running cost is reduced, the operation safety is improved, the fault rate is low, the waste is reduced, the energy is saved, the environment is protected, and finally, the epoxy interlayer 2 and the isolation layer 7 are protected between the input winding 1 and the output winding 3 through the epoxy interlayer 2 and the isolation layer 7 between the input winding 1 and the output winding 3, the iron core 8 is distinguished between the bracket 4 and the frame 5, and the coupling area between the input winding 1 and the output winding 3 can be reduced, the leakage inductance between the primary and secondary windings is increased, and most of harmonic waves in the system can be filtered out by matching with corresponding capacitors, so that the use safety of rear-end electric appliances is protected, and the working principle of the special PWM waveform filter transformer is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A special filter transformer for PWM waveform, comprising an input winding (1) and a frame (5), characterized in that: the utility model discloses a solar energy water heater, including input winding (1), epoxy interlayer (2) are installed to the inboard of input winding (1), and the both sides of output winding (3) install epoxy interlayer (2), the middle part of epoxy interlayer (2) is provided with isolation layer (7), support (4) are installed on the top of input winding (1), frame (5) set up in the top of support (4), the internal distribution of frame (5) has backing plate (6), and the inside middle part of backing plate (6) is connected with fastening bolt (9), iron core (8) have been settled to the inboard of frame (5), foot rest (10) are installed to the bottom of input winding (1).

2. The special filter transformer for PWM waveform of claim 1, wherein: the inner wall of the input winding (1) is tightly attached to the outer wall of the epoxy interlayer (2), and the epoxy interlayer (2) is movably connected with the output winding (3).

3. The special filter transformer for PWM waveform of claim 1, wherein: the input winding (1) is fixedly connected with the support (4), and the support (4) is vertical to the frame (5).

4. The special filter transformer for PWM waveform of claim 1, wherein: the frame (5) is movably connected with the backing plate (6), and the frame (5) forms a thread structure with the fastening bolt (9) through the backing plate (6).

5. The special filter transformer for PWM waveform of claim 1, wherein: the central axis between the input winding (1) and the iron core (8) is crossed, and the iron core (8) and the foot rest (10) are fixedly connected.