CN210608940U

CN210608940U - High-voltage power supply converter with high isolation voltage

Info

Publication number: CN210608940U
Application number: CN201922159559.XU
Authority: CN
Inventors: 高露; 张凯; 张涛
Original assignee: Dalian Haifu Technology Co Ltd
Current assignee: Dalian Haifu Technology Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-05-22
Anticipated expiration: 2029-12-05

Abstract

The utility model provides a high isolation voltage's high voltage power supply converter, include: the power supply system comprises an input electromagnetic interference EMI filtering module, a PFC power factor correction module, an inversion module, a high-isolation high-voltage transformer module, a high-voltage rectification module, an auxiliary power supply module, a high-isolation auxiliary power supply module, a high-voltage and current sampling module, a digital receiving control module, a front panel module for displaying setting and a rear panel module for remote control. The utility model completes isolation through MCU solution; the system is reduced in size from the application point of view; the casing is not electrified and can be touched, so that the safety is effectively improved; the communication is the same as the conventional communication, and isolation is not needed; and simultaneously, the polarity of the power supply can be switched by double outputs.

Description

High-voltage power supply converter with high isolation voltage

Technical Field

The utility model relates to a high voltage power supply converter technical field particularly, especially relates to a high voltage power supply converter of high isolation voltage.

Background

The high-voltage power supply converter is different from a conventional low-voltage power supply converter, the generated high voltage is difficult to be completely isolated, and the voltage is generally obtained in a single-ended grounding mode, so that particularly the difference of the output to ground potential reference can be divided into a positive power supply and a negative power supply, and the polarity of the general voltage can not be switched except the voltage polarity which is added with a special device can be switched.

In some applications requiring high voltage isolation, a power frequency high voltage isolation transformer is generally added due to transformer isolation limitations and non-isolation factors of output sampling. The mains supply is isolated from the power supply used by the power supply converter by a power frequency high-voltage isolation transformer, and the whole power supply is suspended above the potential to be isolated. The capacity of the power frequency isolation transformer directly determines the output power of the power supply, the capacity of the power frequency isolation transformer is the volume of the power supply in high-power application occasions, and the high voltage determines that the shell of the power frequency isolation transformer needs to be correspondingly insulated, so that the weight of the power supply is increased, and the use space is wasted.

Because the whole of the power supply is attached with high voltage, an optical fiber communication mode is needed to be adopted during control, and a control signal is transmitted to the current power supply. When no optical fiber communication port exists, the external control is required to be converted into digital or analog control quantity for control, so that the complexity of the system is improved, and the anti-interference capability of the system is reduced.

Summary the main reasons for the deficiencies of the existing solutions are:

1. the power supply is related to an isolation transformer, and the volume is limited;

2. an isolated power supply optical fiber controller needs to be added, so that the complexity of the system is increased;

3. the high-voltage power supply is integrally isolated, so that people get an electric shock;

4. an isolation device is added, and the set cost of the power supply is increased;

5. the whole case is an equivalent capacitor of a potential increasing power supply and cannot be applied to reverse polarity;

6. the floating potential space is not shielded, and the power supply is easy to be interfered.

The high-voltage power converter is an energy conversion device for generating high voltage, the input of the high-voltage power converter can have single phase and three phase according to different powers, direct current power supply can also be provided due to application limitation, and the output of the power converter is generally different from thousands of volts to hundreds of kilovolts according to different applied voltages.

The high-voltage high-current electromagnetic gun is mainly applied to various fields of high-voltage withstand voltage testers, ray generators, particle accelerators, strong current generators, national defense electromagnetic guns, food sterilization equipment, laser generators, scientific research and the like.

A similar power supply system appears in the applied patent CN203674983U, which uses a fiber-optic scheme, but its use is limited to eliminating the interference caused by the common ground of the control and output. The main transformer, the high-voltage pack and the output sampling power supply are not strongly isolated, so that the high-voltage power supply device cannot be used in the application of high-voltage suspension output.

Disclosure of Invention

In light of the above-identified problems, a high voltage power converter with high isolation voltage is provided. The utility model discloses mainly utilize a high isolation voltage's high voltage power supply converter, a serial communication port, include:

input electromagnetic interference EMI filter module, PFC is Power Factor Correction module promptly, and the contravariant module, high-voltage transformer module is kept apart to the height, high-voltage rectifier module, auxiliary Power source module, the supplementary Power module of high isolation, high-voltage current sampling module, digital receiving control module, the front panel module that shows to set for and remote control's rear panel module. The input EMI filtering module includes: the device comprises a protective tube arranged at the front end, an anti-detonator behind the protective tube, two groups of double pi filters consisting of an x capacitor and a common mode inductor, and a grounded y capacitor.

Furthermore, as the input alternating current charges the energy storage capacitor through the internal rectifying diode, current spikes can be brought to cause phase differences of voltage and current, and the condition of low power factor is formed, and the power factor is corrected through the FPC module to enable the current to follow the phase of the voltage; the FPC module enables the voltage on the energy storage capacitor to be stable through the boost topology boost.

Further, alternating current input passes through the EMI filtering module and is changed into direct current 380V through the PFC power factor correction module; the digital receiving control module sends PWM waves to the inversion module and converts direct current 380V into alternating current; the alternating current is converted into high-voltage alternating current through the high-isolation high-voltage transformer module; the high-voltage alternating current is converted into direct current through the high-voltage rectifying module; the sampling module collects the output voltage and current and transmits the voltage and current to the digital receiving control module; and the digital receiving control module performs loop operation to control the waveform of the inverter so that the output reaches a preset value.

Furthermore, the inverter module is provided with four full-bridge IGBT inverter circuits, each path of driving signal is isolated by an optical coupler, the four full-bridge IGBT inverter circuits are controlled to be switched on and switched off, and direct current output by the FPC module can be converted into high-frequency alternating current which can be input into a transformer.

Furthermore, the high-isolation high-voltage transformer module adopts a primary secondary separation framework, the primary secondary is arranged outside the inner secondary, the secondary is polytetrafluoroethylene, the winding is wound by a honeycomb winding method, the outgoing line is led out by a high-voltage silica gel line, and the secondary is encapsulated by the silica gel to achieve the required voltage resistance.

Furthermore, the high-voltage and current sampling module adopts an MCU with a high-speed 16-bit ADC; the high-voltage and current sampling module converts an analog signal into a digital signal;

the power supply adopts a digital control mode, the digital receiving control module receives digital signals, the MKV31F512 is adopted to realize the processing of input signals, the output of power supply inversion signals and the calculation of a power supply loop.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model completes isolation through MCU solution; the system is reduced in size from the application point of view; the casing is not electrified and can be touched, so that the safety is effectively improved; the communication is the same as the conventional communication, and isolation is not needed; and simultaneously, the polarity of the power supply can be switched by double outputs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is the utility model discloses high isolation high voltage power transformer schematic diagram.

Fig. 3 is a schematic diagram of the high isolation auxiliary power supply module of the present invention.

Fig. 4 is the utility model discloses high-voltage current sampling module schematic diagram.

Fig. 5 is a schematic diagram of the digital reception control module of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below 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 efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-5, the present invention provides a high voltage power converter with high isolation voltage, which includes: input electromagnetic interference EMI filter module, PFC is Power Factor Correction module promptly, and the contravariant module, high-voltage transformer module is kept apart to the height, high-voltage rectifier module, auxiliary Power source module, the supplementary Power module of high isolation, high-voltage current sampling module, digital receiving control module, the front panel module that shows to set for and remote control's rear panel module. The input EMI filtering module includes: the device comprises a protective tube arranged at the front end, an anti-detonator behind the protective tube, two groups of double pi filters consisting of an x capacitor and a common mode inductor, and a grounded y capacitor.

As a preferred embodiment, because the input alternating current charges the energy storage capacitor through the internal rectifying diode, which brings current spikes to cause a phase difference between voltage and current, a power factor bottom is formed, and the power factor is corrected through the FPC module to cause the current to follow the phase of the voltage; the FPC module enables the voltage on the energy storage capacitor to be stable through the boost topology boost.

In the application, as a preferred embodiment, an alternating current input passes through the EMI filter module and is converted into a direct current 380V by the PFC power factor correction module; the digital receiving control module sends PWM waves to the inversion module and converts direct current 380V into alternating current; the alternating current is converted into high-voltage alternating current through the high-isolation high-voltage transformer module; the high-voltage alternating current is converted into direct current through the high-voltage rectifying module; the sampling module collects the output voltage and current and transmits the voltage and current to the digital receiving control module; and the digital receiving control module performs loop operation to control the waveform of the inverter so that the output reaches a preset value.

As a preferred embodiment, the inverter module has four full-bridge IGBT inverter circuits, and the optical coupler isolates each path of driving signal, controls the on and off of the four full-bridge IGBT inverter circuits, and can convert the dc power output by the FPC module into a high-frequency ac power that can be input to the transformer.

Preferably, in this application, high isolation high voltage transformer module adopts elementary secondary separation skeleton, and elementary secondary is outside including, and secondary adopts polytetrafluoroethylene, and the winding adopts honeycomb wire winding method coiling, and the lead-out wire adopts high-pressure silica gel line to draw forth, and secondary reaches required withstand voltage with the silica gel embedment processing. The high-voltage and current sampling module adopts an MCU with a high-speed 16-bit ADC; the high-voltage and current sampling module converts an analog signal into a digital signal; the power supply adopts a digital control mode, the digital receiving control module receives digital signals, the MKV31F512 is adopted to realize the processing of input signals, the output of power supply inversion signals and the calculation of a power supply loop.

Example (b):

30kV voltage needs to be isolated for a 1kW/10kV power supply, and transformation of suspension output can be completed without increasing the volume only by replacing an original circuit correspondingly. If the scheme of the utility model is not used, the weight of 1.5kVa/220V transformer needs to be increased by about 5kg, and extra circuits need to be added to complete the control of the output, so that the weight and the volume are increased.

When the converter valve for flexible direct current transmission needs to be quickly turned off, if a conventional technology is adopted, great design difficulty is caused on design, the size is large, more places need to be isolated, and the power supply is unstable in work. The adoption of the prior art can realize the advantages of small volume, safe case, reliable work and the like.

The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, and the units implement the purpose of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A high isolation voltage high voltage power converter, comprising:

the system comprises an input electromagnetic interference EMI filtering module, a PFC (Power Factor Correction) module, an inversion module, a high-isolation high-voltage transformer module, a high-voltage rectification module, an auxiliary Power supply module, a high-isolation auxiliary Power supply module, a high-voltage and current sampling module, a digital receiving control module, a front panel module for displaying setting and a rear panel module for remote control;

the input EMI filtering module includes: the device comprises a protective tube arranged at the front end, an anti-detonator arranged behind the protective tube, two groups of double pi filters consisting of an x capacitor and a common mode inductor, and a grounded y capacitor;

because the input alternating current charges the energy storage capacitor through the internal rectifying diode, current peak is brought to cause the voltage and the current to have phase difference, and the FPC module corrects a power factor to cause the current to follow the phase of the voltage; the FPC module enables the voltage on the energy storage capacitor to be stable through a boost topology boost;

the alternating current input passes through the EMI filtering module and is changed into direct current 380V through the PFC power factor correction module; the digital receiving control module sends PWM waves to the inversion module and converts direct current 380V into alternating current; the alternating current is converted into high-voltage alternating current through the high-isolation high-voltage transformer module; the high-voltage alternating current is converted into direct current through the high-voltage rectifying module; the sampling module collects the output voltage and current and transmits the voltage and current to the digital receiving control module; and the digital receiving control module performs loop operation to control the waveform of the inverter so that the output reaches a preset value.

2. A high isolation voltage high voltage power converter as recited in claim 1, further characterized by:

the inversion module is provided with four full-bridge IGBT inversion circuits, optically couples and isolates each path of driving signals, controls the on and off of the four full-bridge IGBT inversion circuits, and can change direct current output by the FPC module into high-frequency alternating current capable of being input into a transformer.

3. A high isolation voltage high voltage power converter as recited in claim 1, further characterized by:

the high-isolation high-voltage transformer module adopts a primary secondary separation framework, a primary inner secondary is arranged outside, a secondary polytetrafluoroethylene is adopted, a winding is wound by a honeycomb winding method, a leading-out wire is led out by a high-voltage silica gel wire, and the secondary uses silica gel for encapsulation treatment to achieve the required pressure resistance.

4. A high isolation voltage high voltage power converter as recited in claim 1, further characterized by:

the high-voltage and current sampling module adopts an MCU with a high-speed 16-bit ADC; the high-voltage and current sampling module converts an analog signal into a digital signal; the power supply adopts a digital control mode, the digital receiving control module receives digital signals, the MKV31F512 is adopted to realize the processing of input signals, the output of power supply inversion signals and the calculation of a power supply loop.