CN206135737U

CN206135737U - A excitation power source for adjusting dc magnetic biasing

Info

Publication number: CN206135737U
Application number: CN201621131363.XU
Authority: CN
Inventors: 陈绪轩; 马祥; 陈元杰
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE; Wuhan University of Science and Technology WHUST
Priority date: 2016-10-17
Filing date: 2016-10-17
Publication date: 2017-04-26
Anticipated expiration: 2026-10-17

Abstract

The utility model discloses an excitation power source for adjusting dc magnetic biasing, close the active power factor correction circuit of step -down type including the three -phase sixmo, the active power factor correction circuit electric connection of step -down type is closed to the three -phase sixmo has sampling circuit and power module, the three -phase sixmo is closed the active power factor correction circuit of step -down type and is included three -phase input a, b, c, three -phase input a, b, c have concatenated inductance la, lb, lc respectively, inductance la, lb, lc are all and connect electric capacity and two sets of N type power switch, three groups the output of electric capacity links together, three groups the N type power switch at top links together, can play overvoltage protection's effect through the protection circuit, and this power supply unit has the output voltage precision height, and arrival current power factor is high, and harmonic distortion is little, and output voltage is low, and EMI common mode noise advantage such as little has improved the measurement accuracy of C type sensor.

Description

A kind of field power supply for adjusting D.C. magnetic biasing

Technical field

This utility model relate to field power supply technical field, specially a kind of excitation electricity for adjusting D.C. magnetic biasing Source.

Background technology

D.C. magnetic biasing is a kind of abnormal operating state of transformator, refers to and occurs in that in transformer magnetizing current necessarily DC component, the problems such as the low harmonic of power factor can be produced polluting, therefore be to the magnetic-flux measurement under Direct Current Bias It is very important, it is existing a kind of without the need for print, the c-type sensor D.C. magnetic biasing dynamic magnetic flux measurement apparatus of real-time online, but Because DC power output voltage precision common on market is 1% or so, but we need one kind can be in the range of 0.1% The DC source of accurate adjustment, also not disclosure satisfy that on the market the regulated power supply that this e measurement technology is required, for this purpose, I proposes A kind of field power supply for adjusting D.C. magnetic biasing.

Utility model content

The purpose of this utility model is to provide a kind of field power supply for adjusting D.C. magnetic biasing, to solve above-mentioned background Also not disclosure satisfy that on the market of proposing in the technology regulated power supply that this e measurement technology requires is solving this c-type sensor Measurement produce the problem of larger error.

For achieving the above object, this utility model provides following technical scheme：A kind of excitation for adjusting D.C. magnetic biasing Power supply, including the switching buck APFC of three-phase six, the switching buck active power of the three-phase six because Number correcting circuit is electrically connected with sample circuit and power module, the switching buck APFC of the three-phase six electricity Road includes three-phase input end a, b, c, and described three-phase input end a, b, c are serially connected with respectively inductance La, Lb, Lc, the inductance La, Lb, Lc and are connected to electric capacity and two groups of N-type power switch, and the outfan of electric capacity links together described in three groups, push up described in three groups The N-type power switch in portion links together, and the N-type power switch of bottom described in three groups links together, the N at top described in three groups Type power switch together and is connected to diode D and inductance L1, and the N-type power switch of bottom described in three groups together and is connected to diode D and inductance L2, is provided with electric capacity C between the inductance L1 and inductance L2, the sample circuit include output voltage amplifier and Filter circuit, input voltage amplifier and filter circuit and input current amplifier and filter circuit, the power module Turning in power supply circuits, analog signal processing power supply circuits, sampling module is driven including control loop power-supplying circuit, IGBT Change circuit power supply circuits and DSP28335 power supply circuits.

Preferably, the output voltage amplifier and filter circuit include voltage sensor, the voltage sensor Outfan is simultaneously connected to No. 3 ports of resistance R109, resistance R34 9 and amplifier, the outfan of the resistance R109 and resistance R34 9 And No. 2 ports of earth lead and amplifier, No. 7 ports of the amplifier are simultaneously connected to+15V voltages and electric capacity C92, the electric capacity The output head grounding of C92, No. 4 ports of the amplifier are simultaneously connected to -15V voltages and electric capacity C96, the output of the electric capacity C96 No. 5 ports and the ground wire of amplifier are held and connect, No. 6 ports of the amplifier are serially connected with resistance R107, and the resistance R107 is simultaneously It is connected to resistance R108 and electric capacity C93, the resistance R108 is simultaneously connected to No. 3 ports and the electric capacity C94 of voltage comparator U26A, described The output head grounding of electric capacity C94, the outfan of the electric capacity C93 and be connected to voltage comparator U26A No. 2 ports and No. 1 end Mouthful, No. 8 of the voltage comparator U26A and No. 4 ports are connected to+15V voltages and -15V voltages, the voltage ratio compared with No. 1 port of device U26A is serially connected with resistance R110, and the resistance R110 is simultaneously connected to resistance R111 and electric capacity C95, the resistance The output head grounding of R111 and electric capacity C95, the input of the electric capacity C95 connects No. 5 ports of voltage comparator U26B, described No. 6 ports of voltage comparator U26B and No. 7 ports connect and together export.

Preferably, the outfan of the output voltage amplifier and filter circuit is connected with protection circuit, the protection Circuit includes resistance R112, and the top input of the resistance R112 is simultaneously connected to+15V voltages and resistance R113, the resistance The bottom outfan of R112 is simultaneously connected to No. 5 of electric capacity C97, No. 3 ports of voltage comparator U27A and voltage comparator U27B ends Mouthful, the outfan of the electric capacity C97 is simultaneously connected to ground wire and resistance R114, the outfan string of the resistance R114 and resistance R113 Connect, No. 2 ports of the voltage comparator U27A and No. 6 ports of voltage comparator U27B connect respectively AC-input voltage end No. 4 of mouthful VDCCOM1 and VDCCOM2, the voltage comparator U27A and No. 8 ports are connected to -15V voltages and+15V is electric Pressure, No. 1 port of the voltage comparator U27A is simultaneously connected to resistance R97, No. 7 ports of voltage comparator U27B and diode The top input of D7, the resistance R97 is serially connected with+15V voltages, and the diode D7 is serially connected with resistance R117, the resistance R117 is simultaneously connected to output port and resistance R122, the bottom output head grounding of the R122.

Compared with prior art, the beneficial effects of the utility model are：By the switching buck active power of three-phase six because Number correcting circuit figure, with stable DC output power factor corrective rectifier, and ensures that input current is sine wave and guarantor High efficiency is held, outputting inductance is divided into L1 and L2, and L1=L2, there is provided symmetrical positive and negative output rail, it is symmetrical in order to provide Resistive degeneration, reduces conduction common mode noise current, and two pipes up and down of a phase are always simultaneously open-minded in the design, simultaneously close off , so can cause to be got up easily with DSP controls, overvoltage protection can be played a part of by protection circuit, the power supply Device has output voltage high precision, and input current power factor is high, and harmonic distortion is little, and output voltage is low, and EMI common-mode noises are little The advantages of, improve the certainty of measurement of c-type sensor.

Description of the drawings

Fig. 1 is the switching buck APFC figure of this utility model three-phase six；

Fig. 2 is this utility model output voltage amplifier and filter circuit figure；

Fig. 3 is this utility model protection circuit figure；

Fig. 4 is this utility model input voltage amplifier and filter circuit figure；

Fig. 5 is this utility model input current amplifier and filter circuit figure；

Fig. 6 is this utility model control loop power-supplying circuit figure；

Fig. 7 is that this utility model IGBT drives power supply circuit；

Fig. 8 is this utility model analog signal processing power supply circuit；

Fig. 9 is the change-over circuit power supply circuit in this utility model sampling module；

Figure 10 is this utility model DSP28335 power supply circuits.

Specific embodiment

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of this utility model protection.

Fig. 1 to Figure 10 is referred to, this utility model provides a kind of technical scheme：A kind of excitation for adjusting D.C. magnetic biasing Power supply, including the switching buck APFC of three-phase six, the switching buck active power of the three-phase six because Number correcting circuit is electrically connected with sample circuit and power module, the switching buck APFC of the three-phase six electricity Road includes three-phase input end a, b, c, and described three-phase input end a, b, c are serially connected with respectively inductance La, Lb, Lc, the inductance La, Lb, Lc and are connected to electric capacity and two groups of N-type power switch, and the outfan of electric capacity links together described in three groups, push up described in three groups The N-type power switch in portion links together, and the N-type power switch of bottom described in three groups links together, the N at top described in three groups Type power switch together and is connected to diode D and inductance L1, and the N-type power switch of bottom described in three groups together and is connected to diode D and inductance L2, is provided with electric capacity C between the inductance L1 and inductance L2, the sample circuit include output voltage amplifier and Filter circuit, input voltage amplifier and filter circuit and input current amplifier and filter circuit, the power module Turning in power supply circuits, analog signal processing power supply circuits, sampling module is driven including control loop power-supplying circuit, IGBT Change circuit power supply circuits and DSP28335 power supply circuits.

Wherein, the output voltage amplifier and filter circuit include voltage sensor, the voltage sensor it is defeated Go out to hold and be connected to the outfan of No. 3 ports of resistance R109, resistance R34 9 and amplifier, the resistance R109 and resistance R34 9 simultaneously No. 2 ports of earth lead and amplifier, No. 7 ports of the amplifier are simultaneously connected to+15V voltages and electric capacity C92, the electric capacity The output head grounding of C92, No. 4 ports of the amplifier are simultaneously connected to -15V voltages and electric capacity C96, the output of the electric capacity C96 No. 5 ports and the ground wire of amplifier are held and connect, No. 6 ports of the amplifier are serially connected with resistance R107, and the resistance R107 is simultaneously It is connected to resistance R108 and electric capacity C93, the resistance R108 is simultaneously connected to No. 3 ports and the electric capacity C94 of voltage comparator U26A, described The output head grounding of electric capacity C94, the outfan of the electric capacity C93 and be connected to voltage comparator U26A No. 2 ports and No. 1 end Mouthful, No. 8 of the voltage comparator U26A and No. 4 ports are connected to+15V voltages and -15V voltages, the voltage ratio compared with No. 1 port of device U26A is serially connected with resistance R110, and the resistance R110 is simultaneously connected to resistance R111 and electric capacity C95, the resistance The output head grounding of R111 and electric capacity C95, the input of the electric capacity C95 connects No. 5 ports of voltage comparator U26B, described No. 6 ports of voltage comparator U26B and the connection of No. 7 ports are simultaneously together exported, the output voltage amplifier and filter circuit Outfan be connected with protection circuit, the protection circuit includes resistance R112, and the top input of the resistance R112 simultaneously connects Have+15V voltages and a resistance R113, the bottom outfan of the resistance R112 and be connected to electric capacity C97, the 3 of voltage comparator U27A Number port and No. 5 ports of voltage comparator U27B, the outfan of the electric capacity C97 is simultaneously connected to ground wire and resistance R114, described The outfan concatenation of resistance R114 and resistance R113, No. 2 ports of the voltage comparator U27A and the 6 of voltage comparator U27B Number port connects respectively AC-input voltage port VDCCOM1 and VDCCOM2, No. 4 and No. 8 ends of the voltage comparator U27A Mouth is connected to -15V voltages and+15V voltages, and No. 1 port of the voltage comparator U27A is simultaneously connected to resistance R97, voltage No. 7 ports of comparator U27B and diode D7, the top input of the resistance R97 is serially connected with+15V voltages, two pole Pipe D7 is serially connected with resistance R117, and the resistance R117 is simultaneously connected to output port and resistance R122, the bottom outfan of the R122 Ground connection.

Operation principle：

（1）, this utility model by the switching buck APFC figure of three-phase six, with stable DC Output power factor corrective rectifier, and ensure input current be sine wave and keep high efficiency, outputting inductance be divided into L1 and L2, and L1=L2, there is provided symmetrical positive and negative output rail, in order to provide symmetrical resistive degeneration, reduce conduction common-mode noise Electric current, two pipes up and down of a phase are always simultaneously open-minded in the design, simultaneously close off, and so can cause to use DSP controls Get up easily.

（2）, this utility model by output voltage amplifier and filter circuit figure, when voltage acquisition uses voltage sensor Device LV25-P collects voltage through amplifying with after filter circuit, in being sent to DSP28335, allows DSP to analyze and process.

（3）, this utility model by protection circuit figure, if the voltage of VDCCOM1 is more than 10V, the output voltage of LM293 Negative voltage can be jumped to from positive voltage, when the saltus step for detecting voltage, system can quit work, and play a part of overvoltage protection.

（4）, this utility model by input voltage amplifier and filter circuit figure, when in the ADC using DSP28335 During modular converter, the input range of the A/D of DSP28335 is 0 to 3V, if input negative voltage or the voltage higher than 3V will burn out A/D modules, and the voltage of input is sinusoidal voltage, it is impossible to directly sampled with the circuit of Fig. 2, need again rear end to carry out electricity Pressure process, as shown in figure 4, solving the problems, such as that being input into negative voltage burns out A/D modules well, the design has 2 input voltages Acquisition module, is respectively intended to gather Vab and Vbc, then through being calculated Ua and Ub.

（5）, this utility model by input current amplifier and filter circuit figure, when current acquisition uses voltage sensor Device La100-P collects voltage through amplifying with after filter circuit, in being sent to DSP28335, allows DSP to analyze and process, together Sample, the electric current of input is simple sinusoidal alternating current, so also having connect a change-over circuit in rear end.

（6）, this utility model by control loop power-supplying circuit figure, when input 24V DC voltages, through DC/DC Changer TEN5-2411, exports 5V DC voltages.

（7）, this utility model by IGBT drive power supply circuit, when input 24V DC voltages, through DC/DC conversion Device TEN20-2413, exports 15V DC voltages.

（8）, this utility model by analog signal processing power supply circuit, when input 24V DC voltages, through DC/DC Changer TEN20-2423, exports positive and negative 15V DC voltages.

（9）, this utility model by the change-over circuit power supply circuit in sampling module, as input 24V DC voltages, Jing DC/DC changer REF5030I are crossed, 3V DC voltages are exported.

（10）, this utility model by DSP28335 power supply circuits, when input 24V DC voltages, through LM2596- 3.3, export 3V DC voltages.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out various changes in the case of without departing from principle of the present utility model and spirit, repaiies Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of field power supply for adjusting D.C. magnetic biasing, including three-phase six switching buck APFC electricity Road, it is characterised in that：The switching buck APFC of the three-phase six is electrically connected with sample circuit and electricity Source module, the switching buck APFC of the three-phase six includes three-phase input end a, b, c, and the three-phase is defeated Enter to hold a, b, c to be serially connected with inductance La, Lb, Lc respectively, described inductance La, Lb, Lc and are connected to electric capacity and two groups of N-type power are opened Close, the outfan of electric capacity links together described in three groups, the N-type power switch at top links together described in three groups, three groups of institutes The N-type power switch for stating bottom links together, and the N-type power switch at top described in three groups together and is connected to diode D and electricity Sense L1, the N-type power switch of bottom described in three groups together and is connected to diode D and inductance L2, the inductance L1 and inductance L2 it Between be provided with electric capacity C, the sample circuit includes output voltage amplifier and filter circuit, input voltage amplifier and filtering Circuit and input current amplifier and filter circuit, the power module includes that control loop power-supplying circuit, IGBT drive Change-over circuit power supply circuits and DSP28335 in dynamic power supply circuits, analog signal processing power supply circuits, sampling module are powered electricity Road.

2. the field power supply for adjusting D.C. magnetic biasing according to claim 1, it is characterised in that：The output voltage is adopted Sample amplifies and filter circuit includes voltage sensor, and the outfan of the voltage sensor is simultaneously connected to resistance R109, resistance R34 9 Outfan and earth lead and No. 2 ports of amplifier with No. 3 ports of amplifier, the resistance R109 and resistance R34 9, institute State No. 7 ports of amplifier and be connected to+15V voltages and electric capacity C92, the output head grounding of the electric capacity C92, the amplifier No. 4 ports are simultaneously connected to -15V voltages and electric capacity C96, and the outfan of the electric capacity C96 simultaneously connects No. 5 ports and the ground wire of amplifier, No. 6 ports of the amplifier are serially connected with resistance R107, and the resistance R107 is simultaneously connected to resistance R108 and electric capacity C93, the electricity Hinder R108 and be connected to No. 3 ports and the electric capacity C94 of voltage comparator U26A, the output head grounding of the electric capacity C94, the electric capacity The outfan of C93 is simultaneously connected to No. 2 ports and No. 1 port of voltage comparator U26A, No. 8 and 4 of the voltage comparator U26A Number port is connected to+15V voltages and -15V voltages, and No. 1 port of the voltage comparator U26A is serially connected with resistance R110, The resistance R110 is simultaneously connected to resistance R111 and electric capacity C95, the output head grounding of the resistance R111 and electric capacity C95, the electricity The input for holding C95 connects No. 5 ports of voltage comparator U26B, No. 6 ports and No. 7 ports of the voltage comparator U26B Connection is simultaneously together exported.

3. the field power supply for adjusting D.C. magnetic biasing according to claim 2, it is characterised in that：The output voltage is adopted Sample amplifies and the outfan of filter circuit is connected with protection circuit, and the protection circuit includes resistance R112, the resistance R112 Top input and be connected to+15V voltages and resistance R113, the bottom outfan of the resistance R112 is simultaneously connected to electric capacity C97, electricity No. 3 ports of pressure comparator U27A and No. 5 ports of voltage comparator U27B, the outfan of the electric capacity C97 is simultaneously connected to ground wire With resistance R114, the outfan concatenation of the resistance R114 and resistance R113, No. 2 ports of the voltage comparator U27A and electricity No. 6 ports of pressure comparator U27B connect respectively AC-input voltage port VDCCOM1 and VDCCOM2, the voltage comparator No. 4 of U27A and No. 8 ports are connected to -15V voltages and+15V voltages, and No. 1 port of the voltage comparator U27A is simultaneously The top input for being connected to resistance R97, No. 7 ports of voltage comparator U27B and diode D7, the resistance R97 is serially connected with+ 15V voltages, the diode D7 is serially connected with resistance R117, and the resistance R117 is simultaneously connected to output port and resistance R122, described The bottom output head grounding of R122.