CN109814017A - The IGBT on off operating mode detection circuit and its detection method of three-phase phase-change switch and application - Google Patents
The IGBT on off operating mode detection circuit and its detection method of three-phase phase-change switch and application Download PDFInfo
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Abstract
The invention discloses the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detection method and applications, wherein the IGBT on off operating mode detection circuit has the detection signal input module for being electrically connected to the power module including a power module and respectively and a detection signal receiving module.The power module be used to provide additional DC power supply to the IGBT on state detection circuit of the three-phase phase-change switch, wherein the detection signal input module generates specific detection signal, and by the detection signal in wherein the detection signal receiving module be used to receive in the three-phase phase-change switch in phase line major loop that particular detection signal generated is coupled in the three-phase phase-change switch phase line major loop, and judge according to detection signal the IGBT on state of the three-phase phase-change switch.
Description
Technical field
The present invention relates to a field of power transmission, in more detail, are related to the IGBT on off operating mode of a three-phase phase-change switch
Detection circuit and its detection method and application.
Background technique
In three-phase four-wire system, if three-phase load is unevenly distributed (phase line is to the neutral conductor), residual voltage will be generated, make zero point
Displacement, a phase voltage reduce, another voltage increases, and increase voltage deviation.Same line-to-line load is uneven, then causes between line
Voltage unbalance increases voltage deviation, and the excessive most common accident that may cause of the deviation of voltage is exactly to burn electrical equipment.
At present in power industry, has generally for the way for adjusting three-phase load unbalance following several: passing through APF
(Active Power Filter) active filter mode is compensated by SVG (Static Var Generator) Static Synchronous
Device mode passes through Load adjustment mode and the three-phase phase-change switch mode of manually relocating.In these four regulative modes, pass through
APF active filter is in addition to harmonic carcellation, moreover it is possible to compensating action played to three-phase imbalance to a certain extent, but use at
This is high, is not the solution for inherently realizing balancing the load.SVG static synchronous compensator can to three-phase imbalance into
Row compensation, same cost is very high, can only accomplish step down side three-phase current approximate equilibrium, not be inherently to realize load
The method of balance.The third is the efficiency highest of this mode using manually relocating mode, but it is big to put into manpower, needs to power off,
It is difficult to adapt to the changing rule of load for a long time.Three-phase imbalance rate then can inherently be adjusted using three-phase phase-change switch, together
When use cost it is lower, be suitable for dynamic load variations situation.
Correspondingly, in three-phase phase-change switch, A.C. contactor or IGBT (Insulated Gate are generallyd use
Bipolar Transistor, insulated gate bipolar transistor) it is used as phase-change switch.Making phase-change switch with A.C. contactor has
The feature that structure is simple, capacity is big, low in cost, but the disadvantage is that the commutation time it is longer, usually 100 milliseconds of magnitude.With
IGBT is as phase-change switch, and feature is that rate of phase change is exceedingly fast, about microsecond rank, but the disadvantage is that long-term conducting has heat dissipation and wants
It asks, and capacity is not allowed to be easy to do greatly.That is, two kinds of phase-change switches have certain advantage and disadvantage, if be used alone not
It is able to satisfy use demand.So in order to balance with rate of phase change and capacity problem, it can be in parallel using A.C. contactor and IGBT
The mode of operation, for A.C. contactor as during longtime running, IGBT is then used as commutation device in short-term.Its operating mode is desirable
This is first mutually switched to IGBT operating mode, then this phase IGBT is first turned off, then the IGBT of target phase is opened, then when commutation
The A.C. contactor of target phase is closed again, then the IGBT of target phase is disconnected, thereby realizes quick commutation and great Rong
The advantages of amount operation takes into account.Since IGBT is short-term conducting, so cooling requirements can substantially reduce.
In phase-change switch, no matter commutation device uses A.C. contactor or IGBT, all must only at any time
There is a phase as conducting phase, and to follow strictly the sequence of break-before-make in commutation, because once there is two-phase or three-phase
Simultaneously turn on, directly will lead to phase fault, thus in use and relevant software and hardware design in it is all necessary
In view of this point.When A.C. contactor is as phase-change switch, the auxiliary contact of A.C. contactor can be acquired to judge to connect
Whether tentaculum disconnects, and has very strong operability, so being easier to distinguish.When using IGBT as phase-change switch, due to electricity
The characteristic of power electronic device, there is no the things of similar auxiliary contact to judge whether device turns off, typically only by removing
The delay of a period of time is artificially added after trigger signal again to guarantee IGBT reliable turn-off, when not only additionally increasing commutation in this way
Between, the case where not turning off due to not caused enough the IGBT of time delay can not be excluded, so that the risk of phase fault increases
Add.
Summary of the invention
A purpose of the present invention is that providing IGBT on off operating mode detection circuit and its detection side of a three-phase phase-change switch
Method and application, wherein the IGBT on off operating mode detection circuit be used to detect each phase line three-phase phase-change switch in three-phase circuit
The conducting situation of IGBT, thus in accurate judgement three-phase circuit phase line conducting situation.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications, wherein the IGBT on off operating mode detection circuit accurately determines institute in the case where not needing and additionally increasing time delay
The on-off of three-phase phase-change switch IGBT is stated, to reduce the risk of phase fault in three-phase circuit.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications, wherein the IGBT on off operating mode detection circuit increases the stabilization of the three-phase phase-change switch IGBT work
Property.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications, wherein special detection signal is coupled into described three using safety capacitor by the IGBT on off operating mode detection circuit
In the major loop of circuitry phase, do not need manually to be changed the phase line of the three-phase circuit, to reduce manually-operated
Risk, while also achieving the function of detecting automatically.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications, wherein when the wherein phase line in the three-phase circuit is in the conductive state, the three-phase phase-change switch
IGBT device allows to detect signal and passes through, and then detects and show that the phase line is in the conductive state.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications, wherein the IGBT on off operating mode detection circuit during the work time will not be to each phase line of the three-phase circuit
Primary path impact, the on-off of the detection three-phase circuit-changing switch that can be more stable.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications, wherein the IGBT on off operating mode detection circuit include an isolated power supply module, the isolated power supply module and
External power supply electrical isolation prevents influence of the isolated power supply during the work time by extraneous power supply, while also reducing outer
The noise that portion's power supply generates the IGBT on off operating mode detection circuit.
Another object of the present invention is to provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch and its detections
Methods and applications do not need to open original three-phase wherein the IGBT on off operating mode detection circuit structure is simply easily operated
Putting row replacement into can be detected the on off operating mode for locating the IGBT device, and cost is relatively low.
One aspect under this invention, the present invention provide the IGBT on off operating mode detection circuit of a three-phase phase-change switch, quilt
For detecting the on off operating mode of the IGBT of three-phase phase-change switch comprising:
One power module；
One detection signal input module, wherein the detection signal input module is electrically connected to the power module,
Described in detection signal input module generate detection signal, and couple the three-phase phase-change switch for detection signal generated
In phase line major loop in；With
One detection signal receiving module, wherein the detection signal receiving module is electrically connected to the power module,
Described in detection signal receiving module be used to receive the detection signal in the phase line major loop in the three-phase phase-change switch, and
The IGBT on off operating mode of the three-phase phase-change switch is judged according to detection signal, wherein when the detection signal receiving module is from institute
It states when receiving corresponding detection signal in phase line major loop, the three-phase phase-change switch IGBT is in the conductive state, when described
When detection signal receiving module cannot receive corresponding detection signal from the phase line major loop, three phase-change switches
IGBT is in an off state.
According to one embodiment of present invention, the detection signal input module includes a pulse signal generation module,
Described in pulse signal generation device be used to generate certain pulses signal, and pulse signal generated is changed to the three-phase
Mutually transmitted in the phase line major loop in switch.
According to one embodiment of present invention, the detection signal input module further comprises a detection signal isolation mould
Block, the pulse signal that the detection signal isolation module generates the pulse signal generation module carry out electrical isolation, and will
Pulse signal transmission after light-coupled isolation is in the phase line major loop into the three-phase phase-change switch.
According to one embodiment of present invention, the detection signal input module further comprises a detection signal coupled mode
Block, wherein the detection signal coupling module is used for the detection signal by the detection signal isolation module Jing Guo light-coupled isolation
It is coupled into the phase line major loop in the three-phase phase-change switch.
According to one embodiment of present invention, the pulse signal generation module of the detection signal input module is institute
State the signal output end of the CPU of three-phase phase-change switch.
According to one embodiment of present invention, the power module and external power supply electrical isolation, to prevent external electrical
Source impacts the power module.
According to one embodiment of present invention, the power module further comprises a working power module, an isolation electricity
Source and an isolated power supply module, wherein input power of the working power as the isolated power supply module, the isolation
The working power is isolated into the isolated power supply with certain voltage by power module.
According to one embodiment of present invention, the isolated power supply of the power module is the three-phase phase-change switch
The measure loop of IGBT on off operating mode detection circuit is powered.
According to one embodiment of present invention, the working power module of the power module is to be built in the three-phase
The built-in power of phase-change switch.
According to one embodiment of present invention, the detection signal receiving module includes that a signal receives coupling module,
Described in signal receive coupling module and be communicably electrically connected to the output end of the phase line, and will be on the major loop of the phase line
Detection signal be coupled to detection optocoupler primary side.
According to one embodiment of present invention, the detection signal receiving module further comprises that a signal receives isolation mode
Block, wherein the signal, which receives isolation module, carries out electrical isolation for the detection signal for receiving coupling module from the signal
The input terminal output of backward CPU.
According to one embodiment of present invention, the detection signal receiving module further comprises that a signal extraction judges mould
Block, wherein the signal extraction judgment module, which be used to receive, receives the arteries and veins after isolation module light-coupled isolation from the signal
Signal is rushed, and determines the IGBT on state of the three-phase phase-change switch according to the pulse signal received.
According to one embodiment of present invention, the signal extraction judgment module is the CPU's of the three-phase phase-change switch
Signal input part.
According to one embodiment of present invention, when the IGBT of the three-phase phase-change switch is in the conductive state, the arteries and veins
Rush the pulse signal of signal generation apparatus generation and the pulse signal one that the signal extraction judgment module is reached after transmitting
It causes, waveform having the same and frequency.
Other side under this invention, the present invention further provides a three-phase phase-change switch IGBT on off operating mode detection sides
Method, wherein detection method includes the following steps for the IGBT on off operating mode:
(a) one detection letter of input in the phase line major loop by a detection signal input module into a three-phase phase-change switch
Number；With
(b) letter of the detection in the phase line major loop in the three-phase phase-change switch is received by a detection signal receiving module
Number, if the detection signal receiving module receives corresponding detection signal from the phase line major loop, the three-phase is changed
Mutually switch IGBT is in the conductive state, if the detection signal receiving module cannot receive accordingly from the phase line major loop
Detection signal when, the three-phase phase-change switch IGBT is in an off state.
According to one embodiment of present invention, in the above-mentioned methods, by a power module respectively to the detection signal
Input module and the detection signal output module supply electric energy.
According to one embodiment of present invention, further comprise step in the step (a):
(a.1) pulse signal is generated by a pulse signal generation module；
(a.2) optocoupler electrical isolation is carried out to the pulse signal to generate a detection by a detection signal isolation module
Signal；And
(a.3) the detection signal is inputted into the phase line major loop in the three-phase phase-change switch.
Other side under this invention, the present invention further provides a three-phase phase-change switch devices, for adjusting three-phase
Three-phase load unbalance in circuit comprising:
One input terminal, wherein the input terminal by can be led to be electrically coupled to the neutral conductor of the three-phase circuit input terminal and
The input terminal of three phase lines；
One output end, wherein the output end can be led to the output end for being electrically coupled to the neutral conductor and three described
The load end of phase line；
At least three IGBT devices, wherein the three IGBT device be arranged at the triple line input terminal and output end it
Between, it is used to control the on-off of the triple line of the three-phase circuit；With
The IGBT on off operating mode detection circuit of one three-phase phase-change switch, wherein the IGBT on off operating mode detection circuit is set
The on state for being used to detect the IGBT device in the two sides of the IGBT device is set, wherein the IGBT on off operating mode
Detection circuit further comprises:
One power module；
One detection signal input module, wherein the detection signal input module is electrically connected to the power module,
Described in detection signal input module generate detection signal, and couple the three-phase phase-change switch for detection signal generated
In phase line major loop in；With
One detection signal receiving module, wherein the detection signal receiving module is electrically connected to the power module,
Described in detection signal receiving module be used to receive the detection signal in the phase line major loop in the three-phase phase-change switch, and
The IGBT on off operating mode of the three-phase phase-change switch is judged according to detection signal, wherein when the detection signal receiving module is from institute
It states when receiving corresponding detection signal in phase line major loop, the three-phase phase-change switch IGBT is in the conductive state, when described
When detection signal receiving module cannot receive corresponding detection signal from the phase line major loop, three phase-change switches
IGBT is in an off state.
Detailed description of the invention
Fig. 1 is the three-phase phase-change switch IGBT schematic diagram of the first preferred embodiment according to the present invention.
Fig. 2 is the IGBT on state detection circuit module according to the three-phase phase-change switch of the first preferred embodiment of the invention
Schematic diagram.
Fig. 3 is the IGBT on state detection circuit signal of the three-phase phase-change switch of the first preferred embodiment according to the present invention
Figure.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.It defines in the following description
Basic principle of the invention can be applied to other embodiments, deformation scheme, improvement project, equivalent program and do not carry on the back
Other technologies scheme from the spirit and scope of the present invention.
Fig. 1 to Fig. 3 of reference attached drawing of the present invention, a three-phase phase-change switch of a preferred embodiment according to the present invention
10 this elaboration in following description of IGBT on state detection circuit, wherein the IGBT on-off shape of the three-phase phase-change switch
State detection circuit 10 be used to detect the conducting and disconnection of each phase line of a three-phase phase-change switch 20 in three-phase circuit.Preferably,
The IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch is built in the three-phase commutation in the three-phase circuit
Switch 20.It is highly preferred that the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch is integrated in the three-phase commutation
In the internal circuit board of switch 20, integral structure is formed with the three-phase phase-change switch 20, to reduce to a certain extent
The cost of the IGBT on off operating mode detection circuit 10 of the manufacture three-phase phase-change switch, but also the three-phase phase-change switch 20
It is more light and handy, it is convenient.Those skilled in the art will envision that the IGBT on off operating mode of the three-phase phase-change switch detects electricity
Road 10 can also be designed independently from an outer circuits of the three-phase phase-change switch 20.
As shown in Figure 1, wherein the three-phase phase-change switch 20 can be set in the three-phase circuit with being powered, quilt
To adjust the balance of the three-phase circuit.The three-phase phase-change switch 20 has an input terminal 21 and an output end
22, wherein the input terminal 21 of the three-phase phase-change switch 20 can lead to the neutral conductor for being electrically coupled to the three-phase circuit
The output end 22 of the input terminal of the input terminal of N and three phase lines A, B, C, the three-phase phase-change switch 20 can be connected with being powered
It is connected to the output end of the neutral conductor N and the load end of described three phase lines A, B, C.It will be appreciated by those skilled in the art that
It is that the neutral conductor N is exactly the zero curve in three-phase circuit, described three phase lines A, B, C are in three-phase circuit respectively
Three firewires.That is, the input terminal 21 of the three-phase phase-change switch 20, which can be led to, is electrically coupled to the three-phase
Zero curve and three firewires in alternating current circuit, the output end 22 of the three-phase phase-change switch 20, which can be led to, to be electrically coupled to
Zero curve and firewire load end in the three-phase circuit.The output end of the firewire load end and the neutral conductor N are connect
Enter to user, to form a complete circuit, to customer power supply.
The three-phase phase-change switch 20 further comprises three IGBT devices (Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor) 23, wherein the IGBT device 23 can be set to three intersection with being powered
Between the input terminal and load end of three phase lines A, B, C in current circuit, it is used to control in the three-phase circuit three
The conducting and disconnection of phase line.The IGBT device 23 is the main switching device of the three-phase phase-change switch 20, and described
There are two types of working condition, an on state and an off-states for the tool of IGBT device 23, and the IGBG device 23 can be in institute
It states and switches between on state and the off-state.When the IGBT device 23 that wherein a phase line is electrically connected is on
When state, the input terminal for the phase line that the IGBT device 23 is electrically connected is electrically connected to the load end, at this time described
Phase line is load end power supply, that is to say, that the phase line is in the conductive state at this time, phase line and phase line institute at this time
The IGBT device 23 of connection allows electric signal and other signals of communication to pass through.Correspondingly, described in wherein a phase line is connected
When IGBT device 23 is in an off state, the phase line that the IGBT device 23 is connected is in high-impedance state, and the IGBT is filled
It sets 23 prevention electric signals and other signals of communication therefrom transmits and pass through.
In normal work, can only have wherein that an IGBT device 23 is in the conductive state, when the three-phase alternating current
When IGBT device 23 in road in any one phase line is in the conductive state, other two in the three-phase phase-change switch 20 at this time
The needs of IGBT device 23 are in an off state, and load end at this time is connected to the phase line that the IGBT device 23 is connected,
It is exactly the phase line by the conducting to load supplying.At the IGBT device 23 of the three-phase phase-change switch of the phase line
When off-state, the phase line is not to the load supplying.
It is noted that it is mutually indepedent between three IGBT devices 23 of the three-phase phase-change switch 20, in work
During work, the closure for the IGBT device 23 that isopen is not connected mutually be will not influence.
As shown in Figures 2 and 3, the IGBT on-off shape of the three-phase phase-change switch of a preferred embodiment according to the present invention
State detection circuit 10 includes a detection signal input module 11, and a power module 12 and one detects signal receiving module 13,
Described in detection signal input module 11 be electrically connected to the input terminal of the phase line, the generation of detection signal input module 11
One detection signal, and the detection signal of generation is coupled into the major loop of the phase line.The power module 12 be used for
The detection signal input module 11 and the detection of the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch
Signal receiving module 13 provides electric energy.On the other hand, the power module 12 the IGBT device 23 can also be carried out electrically every
From with eliminate signal noise.Correspondingly, the detection signal receiving module 13 is electrically connected to the three-phase phase-change switch
The output end of IGBT on off operating mode detection circuit 10 be used to receive the detection signal input module 11 and be coupled into the phase line
Detection signal.Signal is detected accordingly when the detection signal receiving module 13 receives, and illustrates that the phase line is on
State, and will test signal and be transmitted to the external world, testing result is obtained, such as bright light shows the phase line conducting.On the contrary, working as institute
The IGBT device 23 believed is stated when being in an off state, signal caused by the detection signal input module 11 is described
IGBT device 23 prevents, and the detection signal receiving module 13 cannot receive the detection signal at this time, and user is also corresponding
Ground obtains testing result, for example signal lamp is in close state at this time.
The first preferred embodiment according to the present invention is installed in A phase line described in the three-phase circuit, B phase line and C
The structure of the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch of phase line is identical with working principle, description below
In by taking A phase line as an example.
When the A phase line is in the conductive state, that is to say, that the IGBT device 23 of the A phase line is on shape
When state, the detection for the detection signal input module 11 generation that the IGBT device 23 allows the A phase line to be connected
Signal is transmitted by the major loop of the A phase line to output extreme direction, that is, flows to the load end.Correspondingly, as the A
When phase line is in an off state, that is to say, that the IGBT device 23 that the A phase line is connected is in an off state, then this
When the IGBT device 23 be in high-impedance state, with prevent it is described detection signal input module 11 generate the detection signal phase
Output end transmitting, that is to say, that signal at this time is blocked at the IGBT device 23.
Shown in Fig. 2 and Fig. 3 according to attached drawing of the present invention, wherein the detection signal input module 11 includes a pulse signal
Module 111, a detection signal isolation module 112 and a detection signal coupling module 113, the detection signal isolation mould occurs
Block 112 is communicably electrically connected to the pulse signal generation module 111 and the detection signal coupling module 113 respectively, and
And the detection signal isolation module 112 can be by the phase line major loop of the pulse signal generation module 111 and three-phase circuit
Electrical isolation is carried out, to avoid influence of the phase line major loop to the detection signal input module 11 in use, together
When certain protective effect is also functioned to the detection signal input module 11.
In detail, the pulse signal generation module 111 can generate the pulse signal of specific frequency, and by the spy
The pulse signal for determining frequency is transferred to the detection signal isolation module 112.Preferably, the pulse signal generation module 111
For a CPU (central processing unit), the detection signal exports outward from the output end I/O pin of the CPU, that is to say, that by institute
CPU output certain pulses signal so far pin is stated, then believes the pulse signal transmission to the detection by the pin
Number isolation module 112.It is highly preferred that the namely described CPU of pulse signal generation module 111 is to be built in the three-phase to change
The mutually CPU of switch 20.That is, the detection signal source of the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch
In the internal processor of the three-phase phase-change switch 20.The IGBT on off operating mode of the three-phase phase-change switch is not only saved in this way
The occupied space of detection circuit 10 is arranged inside the three-phase phase-change switch 20 simultaneously because the detection circuit is integrated,
So also saving the manufacturing cost of the three-phase phase-change switch 20 to a certain extent.It may occur to persons skilled in the art that
It is that the generation of the pulse signal can also be generated by other signal generation apparatus independently of the three-phase phase-change switch,
And the pulse signal is further transmitted to the detection signal isolation module 112.
Correspondingly, the detection signal isolation module 112 receives under the action of power module 12 and comes from the arteries and veins
The certain pulses signal of signal generating module 111 is rushed, and certain pulses detection signal is subjected to electrical isolation, and generate suitable
When detection signal, the detection signal of generation is further then transmitted to the detection signal coupling module 113.
It is noted that the certain pulses signal generated of pulse signal generation module 111 and the inspection
Survey the detection signal frequency having the same that signal isolation module 112 generates.In other words, the detection signal isolation module
112 generate the detection signal under the action of pulse signal.
Preferably, the detection signal isolation module 112 is an optocoupler, and the detection signal isolation module 112 can
With uniaxially from 111 return pulse signal of pulse signal generation module, then by the detection signal isolation module 112
Input terminal and output end are electrically isolated completely to.It will be appreciated by persons skilled in the art that the detection signal isolation module 112
It is generated under the pulse signal effect and correspondingly detects signal, to couple the detection signal of this specific frequency and amplitude
Into the electric loop of the A phase line.
It is noted that the detection signal that this optocoupler exports during the work time will not be to input terminal namely
The pulse signal generation module has an impact, that is to say, that detection signal one-way transmission in the optocoupler, and institute
The strong antijamming capability of optocoupler is stated, Comparision is stablized.
The detection signal coupling module 113 is communicably electrically connected to the detection signal isolation module 112, and institute
It states detection signal coupling module 113 and receives the detection signal from the detection signal isolation module 112, and by the detection
Signal is coupled into the main electric loop of the A phase line.Preferably, the detection signal coupling module 113 is a safety capacitor, this
Field technical staff is it is understood that the safety constant volume selects capacitance appropriate can be by the detection signal isolation module
The 112 detection signals generated are coupled in the main electric loop of the A phase line.On the other hand, the one of the safety capacitor
The A phase line being electrically connected in the three-phase circuit is held, even if since the safety capacitor will not cause after failure
Electric shock, so the detection signal coupling module 113 can protect during the work time and the safety of the person and equipment.
As shown in Figures 2 and 3, wherein the power module 12 is used for for the IGBT to the three-phase phase-change switch
The detection signal input module 11 of on off operating mode detection circuit 10 and the detection signal receiving module 13 provide electric energy.
Due to the three-phase phase-change switch IGBT on off operating mode detection circuit 10 during the work time, the detection signal input module
11 and the detection signal receiving module 13 need to use DC power supply, so the power module 12 is to the three-phase
The IGBT on off operating mode detection circuit 10 of phase-change switch provides additional DC power supply.Further, since 12 quilt of power module
It is directly superimposed upon the AC portion of the phase line major loop of the three-phase circuit, so the power module 12 and external power supply carry out
Electrical isolation, to prevent external power supply from impacting to the power module 12.
In detail, the power module 12 includes a working power module 121, an isolated power supply 122 and an isolation
Power module 123, wherein input power of the working power 121 as the isolated power supply module 123, the isolated power supply
The working power 121 is isolated into the isolated power supply with certain voltage by module 123, it is preferable that the electricity of the isolated power supply
Pressure is 12V.In other words, the working power 121, which is isolated under the action of isolated power supply module 123 as voltage, is
The DC power supply of 12V.Preferably, the electric energy of the power module 12 is mentioned as the power supply device built in the three-phase phase-change switch 20
For.It is highly preferred that the working power module 121 is the built-in power device of the three-phase phase-change switch 20, not only save in this way
The occupied space of the manufacture IGBT on off operating mode detection circuit has been saved, the three-phase commutation has also been saved to a certain extent and opens
The manufacturing cost of pass.It may occur to persons skilled in the art that the power module 12 can be and be arranged on the three-phase
The external power supply of the outside of phase-change switch 20, that is to say, that the working power module 121 of the power module 12 is set
It is individually IGBT on off operating mode detection circuit power supply in the outside of the three-phase phase-change switch 20.
It is noted that the isolated power supply 122 isolation is become the direct current of 12V by the isolated power supply module 123
Source, the isolated power supply 122 are the measure loop power supply of the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch, institute
End occurs with the detection signal of the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch and detects signal receiving end
Peak value is correspondingly also 12V.
The isolated power supply module 123 can be set to the working power module 121 and the isolated power supply with being powered
Between 122.The isolated power supply 122 is used for described in the IGBT on off operating mode detection circuit 10 for the three-phase phase-change switch
It detects signal input module 11 and the detection signal receiving module 13 provides direct current energy.The three-phase phase-change switch
IGBT on off operating mode detection circuit 10 is by the individually energy supply of isolated power supply 122, to prevent the high pressure of the three-phase circuit phase line
The influence of electric discharge or other reasons to the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch.On the other hand, it adopts
It is individually powered with the IGBT on off operating mode detection circuit 10 that the isolated power supply 122 is the three-phase phase-change switch, by described three
The IGBT on off operating mode detection circuit 10 of phase phase-change switch and the power supply in the three-phase circuit carry out electrical isolation, avoid
The danger got an electric shock in use process.
Preferably, the isolated power supply module 123 is a DC-DC power module, that is to say, that by the working power 121
10 work of IGBT on off operating mode detection circuit for being suitble to the three-phase phase-change switch is transformed by the isolated power supply module 123
The isolated power supply 122 made.It is highly preferred that the isolated power supply module 123 is F05505S-1WR2, wherein the isolation is electric
The input voltage of source module 123 is 5V, is exported by the isolated power supply module 123, that is, after the F05505S-1WR2
Voltage is 12V DC power supply.It will be appreciated by persons skilled in the art that the type and model of the isolated power supply module 123
It is codetermined by the working power 121 and 122 voltage of required isolated power supply.
It is noted that in order to be effectively prevented from the isolated power supply 122 during the work time to the three-phase
The IGBT on off operating mode detection circuit 10 of phase-change switch generates the influence of noise, the both ends difference of the isolated power supply module 123
Including an input terminal decoupling capacitor 124 and output end decoupling capacitor 125, wherein the input terminal decoupling capacitor 124 is arranged on
The working power 121, to provide stable isolated power supply modular power source, correspondingly, the output end decoupling capacitor 125 is set
It sets in the isolated power supply 122, to provide stable isolated power supply.It is noted that 124 He of input terminal decoupling capacitor
The output end decoupling capacitor can both provide more stable power supply, it is also possible to which reducing detection signal is coupled to power supply
The noise at end also just reduces the detection signal of the IGBT on off operating mode detection circuit 10 of the three-phase phase-change switch in this way
The influence of noise of input module 11 and the detection signal output module 13.That is, the power module 12 is described defeated
Enter to hold decoupling capacitor 124 and output end decoupling capacitor 125 to enhance the IGBT on off operating mode detection electricity of the three-phase phase-change switch
The anti-interference ability on road 10, to make 122 steady operation of the isolated power supply module 123 and the isolated power supply.
As shown in Figures 2 and 3, wherein the detection signal receiving module 13 be arranged for receiving the detection signal it is defeated
Enter the detection signal that module 11 is coupled into the A phase line major loop.When the institute of the three-phase phase-change switch 20 of the A phase line
State that IGBT device 23 is in the conductive state, the IGBT device of the three-phase phase-change switch 20 allows the detection signal to pass through
The A phase line major loop, the detection signal receiving module 13 can receive the detection signal, and be believed according to the detection
Number make conducting situation judgement.On the contrary, when the IGBT device 23 of the three-phase phase-change switch 20 of the A phase line is in
The IGBT device of off-state, the three-phase phase-change switch 20 is in high-impedance state, to prevent the detection signal from passing through
The A phase line major loop, the detection signal receiving module 13 cannot receive the detection signal at this time, and then respond,
To indicate off-state.
In detail, the detection signal receiving module 13 include a signal receive coupling module 131, a signal receive every
From module 132 and a signal extraction judgment module 133, wherein the signal of the detection signal receiving module 13 receives coupling
Molding block 131 is communicably electrically connected to the output end of the A phase line, that is, IGBT device described in the A phase line is defeated
Outlet, and detection signal is received from the output end of the A phase line.The signal, which receives coupling module 131, can extract the A phase
The detection signal of line, and the detection signal is transferred to the signal and receives isolation module 132.Preferably, the signal connects
Receipts coupling module 131 is a safety capacitor, it will be appreciated by persons skilled in the art that the safety capacitor selects appearance appropriate
Value can couple the detection signal on the A phase line major loop to the primary side of detection optocoupler.On the other hand, the safety capacitor
One end be electrically connected to the A phase line in the three-phase circuit, even if since the safety capacitor will not after failure
Cause to shock by electricity, so the signal receives coupling module 131 further protection and personal and equipment safety during the work time.
The signal, which receives isolation module 132 and is communicably electrically connected to the signal, receives coupling module 131, and from institute
It states signal and receives the reception detection signal of coupling module 131, and the detection signal is subjected to electrical isolation.The signal receive every
Corresponding pulse signal is generated according to the detection signal that the signal receives coupling module 131 from module 132, then by the arteries and veins
It rushes signal and is transmitted to the signal extraction judgment module 133.It is given birth to it is noted that the signal receives isolation module 132
At the pulse signal and the signal receive coupling module 131 received by the detection signal frequency having the same
Rate.Since the detection signal comes from the detection signal input module 11, the signal extraction judgment module 133
Received signal frequency is identical as signal frequency generated in the detection signal input module.That is, detection
There is no variations for the frequency of signal signal during transmitting.Preferably, it is a light that the signal, which receives isolation module 132,
Coupling device, the signal, which receives isolation module 132 and uniaxially can receive coupling module 131 from the signal and receive to detect, to be believed
Number, then the input terminal of the detection signal receiving module 13 and output end are electrically isolated completely to.Those skilled in the art can
With understanding, the signal receives isolation module 132 and generates correspondingly pulse signal under the detection signal function, so as to
The pulse signal of this specific frequency and amplitude is transferred to the signal extraction judgment module 133.
It is noted that the pulse signal that this optocoupler exports during the work time will not be to input terminal namely
The signal receives coupling module 131 and has an impact, that is to say, that signal one-way transmission in the optocoupler, and institute
The strong antijamming capability of optocoupler is stated, Comparision is stablized.
Corresponding pulse signal is generated since the detection signal receives isolation module 132 by the signal, at this time
Pulse signal and it is described detection signal input module 11 the pulse signal generation module 111 generate pulse signal wave
Shape is consistent with frequency.It can be according to the arteries and veins after the signal extraction judgment module 133 receives corresponding pulse signal
Rushing the IGBT device of signal judgement at this time, whether it is in a conductive state.It is generated that the signal receives isolation module 132
Pulse signal is exactly the signal that the signal extraction judgment module 133 finally needs to extract.Preferably, the signal extraction judgement
Module 133 is a CPU, that is to say, that detection signal pulse signal generated is finally input in the CPU.Institute
It states pulse signal and is input to the CPU from the input terminal of the CPU, then CPU pulse signal based on the received
Waveform and frequency judge the IGBT device of the A phase line whether it is in a conductive state.Those skilled in the art can be with
Understand, the CPU is a device with computing function, can be believed based on the received after receiving pulse signal
Number judged either to calculate, then output judgement or calculated result outward, such as at the IGBT of the A phase line
When on state, the CPU can export judging result, such as display lamp either other condition prompting results outward.
It is highly preferred that the detection signal generation apparatus 111 is that same CPU is filled with the signal extraction judgment means 133
It sets, that is to say, that the signal output end of the CPU device i.e. the detection signal generation apparatus 111 send out an arteries and veins
Signal is rushed, then by the pulse signal by the detection signal isolation module 112 and the detection signal coupling module 113
It is coupled into the primary path of the A phase line, under 23 on state of IGBT device of the A phase line, the detection signal
Coupling module 131 can be received by the signal of the signal receiving module 13 to extract, then receive and be isolated by the signal
Module 132 is by the pulse signal transmission to the signal extraction judgment module 133, that is, the signal input part of the CPU.
In other words, the CPU will test signal and export outward from the output end of the CPU, then via returning after the detection circuit
The input terminal of the CPU is returned to, then judges the IGBT's of the three-phase phase-change switch by the calculating arbitration functions of the CPU
On state.
It is noted that the pulse that pulse signal and the CPU input terminal that the output end of the CPU exports are inputted
Signal is consistent, and with this, come the IGBT device 23 that judges the A phase line, whether it is in a conductive state.
When the IGBT device 23 of the A phase line is in an off state, the IGBT device 23 is in cut-off high resistant
State, the output end of CPU detection signal generated is prevented from passing through, so the input terminal of the CPU cannot receive at this time
To the detection signal, to be judged as off-state.It will be appreciated by persons skilled in the art that the signal extraction judgement
Its main function of device 133 is to receive the pulse signal that isolation module 132 is received from the signal, and according to the detection
Signal judges that the IGBT device of the A phase line is in the conductive state, as long as the pulse is identified and judgeed so having
The device of signal.
First preferred embodiment according to the present invention, the present invention provide a three-phase phase-change switch IGBT condition detection method, institute
State method the following steps are included:
(A) one detection letter of input in the phase line major loop by a detection signal input module into a three-phase phase-change switch
Number；
(B) letter of the detection in the phase line major loop in the three-phase phase-change switch is received by a detection signal receiving module
Number, if the detection signal receiving module receives corresponding detection signal from the phase line major loop, the three-phase is changed
Mutually switch IGBT is in the conductive state, if the detection signal receiving module cannot receive accordingly from the phase line major loop
Detection signal when, the three-phase phase-change switch IGBT is in an off state.
In step a, wherein further comprising step in the step (a):
(a.1) pulse signal is generated by a pulse signal generation module；
(a.2) optocoupler electrical isolation is carried out to the pulse signal to generate a detection by a detection signal isolation module
Signal；And
(a.3) the detection signal is inputted into the phase line major loop in the three-phase phase-change switch.
When the three-phase phase-change switch IGBT device 23 is in the conductive state, the three-phase phase-change switch IGBT device 23
The detection signal is allowed to pass through and transmit in the major loop of the phase line.On the contrary, working as the three-phase phase-change switch IGBT
When device 23 is in an off state, the three-phase phase-change switch IGBT device 23 is in high-impedance state, to prevent the detection signal
Pass through and transmit in the major loop of the phase line.
When the three-phase phase-change switch IGBT device 23 is in the conductive state, the pulse signal generation device 111 is raw
At pulse signal with to reach the pulse signal of the signal extraction judgment module consistent after transmitting, that is to say, that there is phase
Same waveform and frequency.
It should be understood by those skilled in the art that foregoing description and the embodiment of the present invention shown in the drawings are only used as illustrating
And it is not intended to limit the present invention.The purpose of the present invention has been fully and effectively achieved.Function and structural principle of the invention exists
It shows and illustrates in embodiment, under without departing from the principle, embodiments of the present invention can have any deformation or modification.
Claims (10)
1. the IGBT on off operating mode detection circuit of a three-phase phase-change switch, be used to detect the on-off of the IGBT of three-phase phase-change switch
State characterized by comprising
One power module；
One detection signal input module, wherein the detection signal input module is electrically connected to the power module, wherein institute
It states detection signal input module and generates detection signal, and couple detection signal generated in the three-phase phase-change switch
In phase line major loop；With
One detection signal receiving module, wherein the detection signal receiving module is electrically connected to the power module, wherein institute
State the detection signal in the phase line major loop that be used to receive in the three-phase phase-change switch of detection signal receiving module, and according to
Detection signal judges the IGBT on off operating mode of the three-phase phase-change switch, wherein when the detection signal receiving module is from the phase
When receiving corresponding detection signal in line major loop, the three-phase phase-change switch IGBT is in the conductive state, when the detection
When signal receiving module cannot receive corresponding detection signal from the phase line major loop, the three-phase phase-change switch IGBT
It is in an off state.
2. IGBT on off operating mode detection circuit as described in claim 1, wherein the detection signal input module includes a pulse
Signal generating module, wherein the pulse signal generation device be used to generate certain pulses signal, and by pulse generated
Signal transmits in the phase line major loop into the three-phase phase-change switch.
3. IGBT on off operating mode detection circuit as claimed in claim 2, wherein the detection signal input module further comprises
One detection signal isolation module, the detection signal isolation module pulse signal that generates the pulse signal generation module into
Row electrical isolation, and by the pulse signal transmission after light-coupled isolation in the phase line major loop into the three-phase phase-change switch.
4. IGBT on off operating mode detection circuit as claimed in claim 3, wherein the detection signal input module further comprises
One detection signal coupling module, wherein the detection signal coupling module is used for the detection signal isolation module by light
The detection signal of coupling isolation is coupled into the phase line major loop in the three-phase phase-change switch.
5. IGBT on off operating mode detection circuit as described in claim 1, wherein the detection signal receiving module includes a signal
Coupling module is received, wherein the signal, which receives coupling module, is communicably electrically connected to the output end of the phase line, and by institute
State the primary side that the detection signal on the major loop of phase line is coupled to detection optocoupler.
6. IGBT on off operating mode detection circuit as claimed in claim 5, wherein the detection signal receiving module further comprises
One signal receives isolation module, wherein the signal receives the detection that isolation module will receive coupling module from the signal
Signal exports after carrying out electrical isolation to the input terminal of CPU.
7. IGBT on off operating mode detection circuit as claimed in claim 6, wherein the detection signal receiving module further comprises
One signal extraction judgment module, wherein the signal extraction judgment module, which be used to receive, receives isolation mode from the signal
Pulse signal after block light-coupled isolation, and determine that shape is connected in the IGBT of the three-phase phase-change switch according to the pulse signal received
State.
8. a three-phase phase-change switch IGBT on off operating mode detection method, which comprises the following steps:
(a) one detection signal of input in the phase line major loop by a detection signal input module into a three-phase phase-change switch；
With
(b) the detection signal in the phase line major loop in the three-phase phase-change switch is received by a detection signal receiving module,
If the detection signal receiving module receives corresponding detection signal from the phase line major loop, the three-phase commutation is opened
It is in the conductive state to close IGBT, if the detection signal receiving module cannot receive corresponding inspection from the phase line major loop
When surveying signal, the three-phase phase-change switch IGBT is in an off state.
9. IGBT on off operating mode detection method according to claim 8, wherein further comprising in the step (a)
Step:
(a.1) pulse signal is generated by a pulse signal generation module；
(a.2) optocoupler electrical isolation is carried out to the pulse signal by a detection signal isolation module to generate detection letter
Number；And
(a.3) the detection signal is inputted into the phase line major loop in the three-phase phase-change switch.
10. a three-phase phase-change switch device, for adjusting the three-phase load unbalance in three-phase circuit characterized by comprising
One input terminal, wherein the input terminal can be led to the input terminal for being electrically coupled to the neutral conductor of the three-phase circuit and three
The input terminal of phase line；
One output end, wherein the output end can be led to the output end for being electrically coupled to the neutral conductor and three phase lines
Load end；
At least three IGBT devices, wherein the three IGBT device is arranged between the input terminal and output end of the triple line,
It is used to control the on-off of the triple line of the three-phase circuit；With
The IGBT on off operating mode detection circuit of one three-phase phase-change switch, wherein the IGBT on off operating mode detection circuit is arranged on
The two sides of the IGBT device are used to detect the on state of the IGBT device, wherein the IGBT on off operating mode detects
Circuit further comprises:
One power module；
One detection signal input module, wherein the detection signal input module is electrically connected to the power module, wherein institute
It states detection signal input module and generates detection signal, and couple detection signal generated in the three-phase phase-change switch
In phase line major loop；With
One detection signal receiving module, wherein the detection signal receiving module is electrically connected to the power module, wherein institute
State the detection signal in the phase line major loop that be used to receive in the three-phase phase-change switch of detection signal receiving module, and according to
Detection signal judges the IGBT on off operating mode of the three-phase phase-change switch, wherein when the detection signal receiving module is from the phase
When receiving corresponding detection signal in line major loop, the three-phase phase-change switch IGBT is in the conductive state, when the detection
When signal receiving module cannot receive corresponding detection signal from the phase line major loop, three phase-change switch IGBT
It is in an off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159694.3A CN109814017A (en) | 2017-11-20 | 2017-11-20 | The IGBT on off operating mode detection circuit and its detection method of three-phase phase-change switch and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159694.3A CN109814017A (en) | 2017-11-20 | 2017-11-20 | The IGBT on off operating mode detection circuit and its detection method of three-phase phase-change switch and application |
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|---|---|
| CN109814017A true CN109814017A (en) | 2019-05-28 |
Family
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|---|---|---|---|
| CN201711159694.3A Pending CN109814017A (en) | 2017-11-20 | 2017-11-20 | The IGBT on off operating mode detection circuit and its detection method of three-phase phase-change switch and application |
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