CN209613252U - A kind of frequency conversion dual-pulse power supply - Google Patents
A kind of frequency conversion dual-pulse power supply Download PDFInfo
- Publication number
- CN209613252U CN209613252U CN201920196442.6U CN201920196442U CN209613252U CN 209613252 U CN209613252 U CN 209613252U CN 201920196442 U CN201920196442 U CN 201920196442U CN 209613252 U CN209613252 U CN 209613252U
- Authority
- CN
- China
- Prior art keywords
- diode
- resistance
- frequency
- variable
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to electrostatic precipitation technology fields, in particular to a kind of frequency conversion dual-pulse power supply, including three facies tract buckle releaser air switches, three-phase controlled rectifier, first filter, second filter, the first single-phase variable frequency inverter, the second single-phase variable frequency inverter, dsp controller, the first variable-frequency pulse transformer, the second variable-frequency pulse transformer, the first frequency conversion dipulse rectifier, the second frequency conversion dipulse rectifier, the first pulse sampling circuit and the second pulse sampling circuit；The basic voltage height and pulse voltage that the frequency conversion dual-pulse power supply of this programme design not only exports are high, and the repeatable frequency of pulse can achieve 1000pps, flashover frequency is 1000 times/min and does not damage equipment, it is able to solve frequent flashover inside electric precipitator, so that the operation of frequency conversion dual-pulse power supply reaches ideal emission reduction effect.
Description
Technical field
The utility model relates to electrostatic precipitation technology field, in particular to a kind of frequency conversion dual-pulse power supply.
Background technique
Due to inevitably resulting from a large amount of flue gas and flying dust in the industrial production, and also containing a large amount of in flue gas
Fine solid particle will cause serious environmental pollution if these dust and flying dust are directly discharged in environment, to give environment
Different degrees of pollution is brought, harm is brought to people's health.Play the part of during past electric precipitation is in control atmosphere pollution
Critically important role is drilled；Living environment is required to be continuously improved however as people, haze is more serious, both at home and abroad environmental protection group
It knits and improves discharge standard year by year, the control and electric dust-removing equipment to pollution sources have higher requirement.Although existing under existing situation
There is the efficiency of dust collection of the electric precipitator of technology to can reach 99.9% or more, but be equipped with due to current electric precipitator power frequency, high frequency,
The pulse power, power frequency supply lead to three-phase imbalance, and secondary voltage is relatively low, and the current density of electric field is small, and are easy to happen anti-electricity
Dizzy, high frequency electric source is similar with power frequency supply all to fail the effective control of the realization of the discharge to PM2.5 particle below, during which people
Many improvement, the thyristor supply of three-phase have also been made, high frequency electric source, becomes the capacitive coupling examination pulse power (the abbreviation pulse power)
Frequency power etc., wherein the effect of the pulse power is best, but due to the existing condition of high tension apparatus with it is desired have it is huge
Gap, cause the pulse power that can not adapt to frequent flashover inside electric precipitator, cause often to burn the pulse power
Coupled capacitor, equipment are placed on tens meters of high-altitude, and running environment is severe, and maintenance condition is harsh, lead to the operation of the pulse power
And not up to ideal emission reduction effect.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of frequency conversion dual-pulse power supplies.
In order to solve the above-mentioned technical problem, the scheme that the utility model uses are as follows:
A kind of frequency conversion dual-pulse power supply, including three facies tract buckle releaser air switches, three-phase controlled rectifier, the first filtering
Device, second filter, the first single-phase variable frequency inverter, the second single-phase variable frequency inverter, dsp controller, the first variable-frequency pulse become
Depressor, the second variable-frequency pulse transformer, the first frequency conversion dipulse rectifier, the second frequency conversion dipulse rectifier, the first pulse are adopted
Sample circuit and the second pulse sampling circuit；
The output end of the three facies tracts buckle releaser air switch connects the input terminal and DSP of the three-phase controlled rectifier respectively
The input of the input terminal of controller, the three facies tracts buckle releaser air switch terminates three-phase alternating-current supply；
The output end of the three-phase controlled rectifier connects the input terminal and second filter of the first filter respectively
Input terminal；
The output of the first filter terminates the input terminal of the first single-phase variable frequency inverter, the second filter
Output terminate the input terminal of the second single-phase variable frequency inverter；
The output of the first single-phase variable frequency inverter terminates the input terminal of the first variable-frequency pulse transformer, and described the
The output of two single-phase variable frequency inverters terminates the input terminal of the second variable-frequency pulse transformer；
The input of the first frequency conversion dipulse rectifier terminates the output end of the first variable-frequency pulse transformer, described
The input of second frequency conversion dipulse rectifier terminates the output end of the second variable-frequency pulse transformer, the double arteries and veins of first frequency conversion
The output for rushing rectifier terminates the input terminal of first pulse sampling circuit, the output of the second frequency conversion dipulse rectifier
Terminate the input terminal of second pulse sampling circuit；
The input terminal of the dsp controller connects the output end and the second impulse sampling of first pulse sampling circuit respectively
The output end of circuit, the output end of the dsp controller connect the input terminal and second of the described first single-phase variable frequency inverter respectively
The input terminal of single-phase variable frequency inverter.
The utility model has the beneficial effects that:
Compared with the pulse power of conventional capacitive coupling superposition, conventional power frequency, high frequency electric source, this programme passes through setting
Three facies tract buckle releaser air switches, three-phase controlled rectifier, first filter, second filter, the first single-phase variable frequency inverter,
Second single-phase variable frequency inverter, dsp controller, the first variable-frequency pulse transformer, the second variable-frequency pulse transformer, the first frequency conversion are double
Pulse rectifier, the second frequency conversion dipulse rectifier, the first pulse sampling circuit and the second pulse sampling circuit constitute frequency conversion
Dual-pulse power supply；First pulse sampling circuit and the second pulse sampling circuit are electrically connected with dsp controller respectively, pass through difference
Pulse sampling circuit feed back to dsp controller；The input with the first single-phase variable frequency inverter respectively of the output end of dsp controller
End is connected with the input terminal of the second single-phase variable frequency inverter, can be by dsp controller to the first single-phase variable frequency inverter and the
Two single-phase variable frequency inverter output control signals are to adjust base voltage-frequency rate and amplitude, pulse frequency and amplitude.This programme design
The basic voltage height and pulse voltage that frequency conversion dual-pulse power supply not only exports are high, but also pulse repeats frequency and can achieve
1000pps, flashover frequency are 1000 times/min and do not damage equipment, are able to solve frequent flashover inside electric precipitator,
So that the operation of frequency conversion dual-pulse power supply reaches ideal emission reduction effect；And first variable-frequency pulse transformer and connecting cable can
With the Industrial Frequency Transformer and original cable for reusing original, the second variable-frequency pulse volume of transformer be Industrial Frequency Transformer four/
One, cost is extremely low；Transformer separates, outside transformer holding chamber with the control cabinet for loading control element, and control cabinet is placed and interior
(electronic component is in the relatively good interior of environment, increases reliability), the two can reach 600 meters apart from maximum, support
Line transformation, which is reduced, shuts down transformation bring capacity loss, while also greatly improving the maintainability of equipment.In addition, this programme designs
Frequency conversion dual-pulse power supply be widely used, it both can be applied to newly-built deduster construction, also can be applied to old electric field and changes
It makes.
Detailed description of the invention
Fig. 1 is the circuit module schematic block diagram according to a kind of frequency conversion dual-pulse power supply of the utility model；
Fig. 2 is the circuit diagram according to a kind of embodiment one of frequency conversion dual-pulse power supply of the utility model；
Fig. 3 is the circuit diagram according to a kind of embodiment two of frequency conversion dual-pulse power supply of the utility model；
Fig. 4 is the circuit diagram according to a kind of embodiment three of frequency conversion dual-pulse power supply of the utility model；
Label declaration:
1, three facies tract buckle releaser air switch；2, three-phase controlled rectifier；3, first filter；4, second filter；5,
First single-phase variable frequency inverter；6, the second single-phase variable frequency inverter；7, the first variable-frequency pulse transformer；8, the second variable-frequency pulse becomes
Depressor；9, the first frequency conversion dipulse rectifier；10, the second frequency conversion dipulse rectifier；11, the first pulse sampling circuit；12,
Two pulse sampling circuits；13, dsp controller；14, three-phase alternating-current supply；15, fusible core；16, the first EMI circuit；17, the 2nd EMI
Circuit；R1, first resistor；R2, second resistance；R3,3rd resistor；R4, the 4th resistance；R5, the 5th resistance；R6, the 6th resistance；
R7, the 7th resistance；R8, the 8th resistance；D1, first diode；
D2, the second diode；D3, third diode；D4, the 4th diode；D5, the 5th diode；D6, the six or two pole
Pipe；D7, the 7th diode；D8, the 8th diode.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is: by the way that three facies tract buckle releaser air switches, three-phase controlled rectification are arranged
Device, first filter, second filter, the first single-phase variable frequency inverter, the second single-phase variable frequency inverter, dsp controller, first
Variable-frequency pulse transformer, the second variable-frequency pulse transformer, the first frequency conversion dipulse rectifier, the second frequency conversion dipulse rectifier,
First pulse sampling circuit and the second pulse sampling circuit constitute frequency conversion dual-pulse power supply, are able to solve frequency inside electric precipitator
Numerous flashover, so that the operation of frequency conversion dual-pulse power supply reaches ideal emission reduction effect.
Fig. 1 is please referred to, technical solution provided by the utility model:
A kind of frequency conversion dual-pulse power supply, including three facies tract buckle releaser air switches, three-phase controlled rectifier, the first filtering
Device, second filter, the first single-phase variable frequency inverter, the second single-phase variable frequency inverter, dsp controller, the first variable-frequency pulse become
Depressor, the second variable-frequency pulse transformer, the first frequency conversion dipulse rectifier, the second frequency conversion dipulse rectifier, the first pulse are adopted
Sample circuit and the second pulse sampling circuit；
The output end of the three facies tracts buckle releaser air switch connects the input terminal and DSP of the three-phase controlled rectifier respectively
The input of the input terminal of controller, the three facies tracts buckle releaser air switch terminates three-phase alternating-current supply；
The output end of the three-phase controlled rectifier connects the input terminal and second filter of the first filter respectively
Input terminal；
The output of the first filter terminates the input terminal of the first single-phase variable frequency inverter, the second filter
Output terminate the input terminal of the second single-phase variable frequency inverter；
The output of the first single-phase variable frequency inverter terminates the input terminal of the first variable-frequency pulse transformer, and described the
The output of two single-phase variable frequency inverters terminates the input terminal of the second variable-frequency pulse transformer；
The input of the first frequency conversion dipulse rectifier terminates the output end of the first variable-frequency pulse transformer, described
The input of second frequency conversion dipulse rectifier terminates the output end of the second variable-frequency pulse transformer, the double arteries and veins of first frequency conversion
The output for rushing rectifier terminates the input terminal of first pulse sampling circuit, the output of the second frequency conversion dipulse rectifier
Terminate the input terminal of second pulse sampling circuit；
The input terminal of the dsp controller connects the output end and the second impulse sampling of first pulse sampling circuit respectively
The output end of circuit, the output end of the dsp controller connect the input terminal and second of the described first single-phase variable frequency inverter respectively
The input terminal of single-phase variable frequency inverter.
As can be seen from the above description, the utility model has the beneficial effects that:
Compared with the pulse power of conventional capacitive coupling superposition, conventional power frequency, high frequency electric source, this programme passes through setting
Three facies tract buckle releaser air switches, three-phase controlled rectifier, first filter, second filter, the first single-phase variable frequency inverter,
Second single-phase variable frequency inverter, dsp controller, the first variable-frequency pulse transformer, the second variable-frequency pulse transformer, the first frequency conversion are double
Pulse rectifier, the second frequency conversion dipulse rectifier, the first pulse sampling circuit and the second pulse sampling circuit constitute frequency conversion
Dual-pulse power supply；First pulse sampling circuit and the second pulse sampling circuit are electrically connected with dsp controller respectively, pass through difference
Pulse sampling circuit feed back to dsp controller；The input with the first single-phase variable frequency inverter respectively of the output end of dsp controller
End is connected with the input terminal of the second single-phase variable frequency inverter, can be by dsp controller to the first single-phase variable frequency inverter and the
Two single-phase variable frequency inverter output control signals are to adjust base voltage-frequency rate and amplitude, pulse frequency and amplitude.This programme design
The basic voltage height and pulse voltage that frequency conversion dual-pulse power supply not only exports are high, but also pulse repeats frequency and can achieve
1000pps, flashover frequency are 1000 times/min and do not damage equipment, are able to solve frequent flashover inside electric precipitator,
So that the operation of frequency conversion dual-pulse power supply reaches ideal emission reduction effect；And first variable-frequency pulse transformer and connecting cable can
With the Industrial Frequency Transformer and original cable for reusing original, the second variable-frequency pulse volume of transformer be Industrial Frequency Transformer four/
One, cost is extremely low；Transformer separates, outside transformer holding chamber with the control cabinet for loading control element, and control cabinet is placed and interior
(electronic component is in the relatively good interior of environment, increases reliability), the two can reach 600 meters apart from maximum, support
Line transformation, which is reduced, shuts down transformation bring capacity loss, while also greatly improving the maintainability of equipment.In addition, this programme designs
Frequency conversion dual-pulse power supply be widely used, it both can be applied to newly-built deduster construction, also can be applied to old electric field and changes
It makes.
Further, the first variable-frequency pulse transformer includes armature winding and secondary windings, the second frequency conversion arteries and veins
Rushing transformer includes armature winding and secondary windings, and the first frequency conversion dipulse rectifier includes first diode, the two or two
Pole pipe, third diode and the 4th diode, the second frequency conversion dipulse rectifier include the 5th diode, the six or two pole
Pipe, the 7th diode and the 8th diode, first pulse sampling circuit include first resistor, second resistance and third electricity
Resistance, second pulse sampling circuit includes second resistance, 3rd resistor and the 4th resistance；
The armature winding of the first variable-frequency pulse transformer connects AC power source, time of the first variable-frequency pulse transformer
One end of grade winding is electrically connected with the anode of the cathode of the first diode and third diode respectively, the first diode
Anode respectively with the anode of second diode, one end of first resistor, one end of the 4th resistance, the 5th diode yin
The electrical connection of the cathode of pole and the 6th diode, the cathode of second diode respectively with the anode of the 4th diode and the
The other end of the secondary windings of one variable-frequency pulse transformer is electrically connected, and the cathode of the 4th diode is respectively with the described 3rd 2
The cathode of pole pipe and one end electrical connection of second resistance, the other end of the first resistor and one end of the 3rd resistor are electrically connected
It connects, the other end of the second resistance is electrically connected with the other end of the 3rd resistor, the other end difference of the 4th resistance
Be electrically connected with the anode of the anode of the 7th diode and the 8th diode, the anode of the 5th diode respectively with it is described
One end of the secondary windings of the cathode of 7th diode and the second variable-frequency pulse transformer is electrically connected, and second variable-frequency pulse becomes
The other end of the secondary windings of depressor is electrically connected with the cathode of the anode of the 6th diode and the 8th diode respectively, described
The armature winding of second variable-frequency pulse transformer connects AC power source.
Seen from the above description, second resistance can acquire the two of the first pulse sampling circuit and the second pulse sampling circuit
Primary current；The first variable-frequency pulse transformer work and the second variable-frequency pulse transformer do not work when, the second frequency conversion dipulse is whole
The 5th diode, the 6th diode, the 7th diode and the 8th diode flowed in device becomes the first variable-frequency pulse transformer pair
The diode of electric field power supply；The second variable-frequency pulse transformer work and the first variable-frequency pulse transformer do not work when, first become
First diode, the second diode, third diode and the 4th diode in frequency dipulse rectifier become the second frequency conversion arteries and veins
Rush the diode that transformer powers to electric field；The work of first variable-frequency pulse transformer and the second variable-frequency pulse transformer work at the same time
When, it is equivalent to two capacitor series coupleds；To realize that each variable-frequency pulse transformer can be individually to an electric field
Basic voltage and pulse voltage are provided.
The work of the first variable-frequency pulse transformer adds pulse mode, the second variable-frequency pulse transformation in basic voltage under normal circumstances
Device works in pulse mode, and the second variable-frequency pulse transformer automatically switches to base if the first variable-frequency pulse transformer breaks down
Plinth voltage adds pulse mode, and switching time is Millisecond, electric field power supply is not influenced, to guarantee electric field receipts steady in a long-term
Dirt.
Further, the frequency conversion dual-pulse power supply further includes the 7th resistance and the 8th resistance, first variable-frequency pulse
Transformer includes armature winding and secondary windings, and the second variable-frequency pulse transformer includes armature winding and secondary windings, institute
Stating the first frequency conversion dipulse rectifier includes first diode, the second diode, third diode and the 4th diode, and described
Two frequency conversion dipulse rectifiers include the 5th diode, the 6th diode, the 7th diode and the 8th diode, first arteries and veins
Rushing sample circuit includes first resistor, second resistance and 3rd resistor, and second pulse sampling circuit includes the 4th resistance, the
Five resistance and the 6th resistance；
The armature winding of the first variable-frequency pulse transformer connects AC power source, time of the first variable-frequency pulse transformer
One end of grade winding is electrically connected with the anode of the cathode of the first diode and third diode respectively, the first diode
Anode be electrically connected respectively with one end of the anode of second diode, one end of first resistor and the 7th resistance, described
The cathode of two diodes is another with the secondary windings of the anode of the 4th diode and the first variable-frequency pulse transformer respectively
End electrical connection, cathode of the cathode of the 4th diode respectively with one end of the second resistance and third diode are electrically connected
Connect, the other end of the first resistor is electrically connected with one end of the 3rd resistor, the other end of the 3rd resistor with it is described
The other end of second resistance is electrically connected, and the other end of the 7th resistance is electrically connected with one end of the 8th resistance, and described the
One end, the anode of fiveth diode and the anode of sixth resistance of the other end of eight resistance respectively with the 4th resistance are electrically connected
Connect, the cathode of the 6th diode respectively with the anode of the 8th diode and the second variable-frequency pulse transformer it is secondary around
One end electrical connection of group, the cathode of the 8th diode cathode with one end of the 6th resistance and the 7th diode respectively
Electrical connection, time with the cathode of the 5th diode and the second variable-frequency pulse transformer respectively of the anode of the 7th diode
The other end electrical connection of grade winding, the other end of the 4th resistance are electrically connected with one end of the 5th resistance, and the described 5th
The other end of the other end of resistance respectively with the other end of the second resistance, the other end of 3rd resistor and the 6th resistance is electrically connected
It connects, the other end of the 5th resistance and the other end of the 6th resistance are grounded, the primary of the second variable-frequency pulse transformer
Winding connects AC power source.
Further, the frequency conversion dual-pulse power supply further includes the 7th resistance and the 8th resistance, first variable-frequency pulse
Transformer includes armature winding and secondary windings, and the second variable-frequency pulse transformer includes armature winding and secondary windings, institute
Stating the first frequency conversion dipulse rectifier includes first diode, the second diode, third diode and the 4th diode, and described
Two frequency conversion dipulse rectifiers include the 5th diode, the 6th diode, the 7th diode and the 8th diode, first arteries and veins
Rushing sample circuit includes first resistor, second resistance and 3rd resistor, and second pulse sampling circuit includes the 4th resistance, the
Five resistance and the 6th resistance；
The armature winding of the first variable-frequency pulse transformer connects AC power source, time of the first variable-frequency pulse transformer
One end of grade winding is electrically connected with the anode of the cathode of the first diode and third diode respectively, the first diode
Anode be electrically connected respectively with one end of the anode of second diode, one end of first resistor and the 7th resistance, described
The cathode of two diodes is another with the secondary windings of the anode of the 4th diode and the first variable-frequency pulse transformer respectively
End electrical connection, the one end of the cathode of the 4th diode respectively with the cathode of the third diode and second resistance is electrically connected
Connect, the other end of the first resistor is electrically connected with one end of the 3rd resistor, the other end of the second resistance respectively with
One end of the other end of the 3rd resistor, one end of the 5th resistance and the 6th resistance is electrically connected, one end of the 5th resistance
It being grounded with one end of the 6th resistance, the other end of the 5th resistance is electrically connected with one end of the 4th resistance, and the described 4th
One end, the anode of fiveth diode and the anode of sixth diode of the other end of resistance respectively with the 8th resistance are electrically connected
Connect, the cathode of the 6th diode respectively with the anode of the 8th diode and the second variable-frequency pulse transformer it is secondary around
One end electrical connection of group, the cathode of the 8th diode yin with the other end of the 6th resistance and the 7th diode respectively
Pole electrical connection, the anode of the 7th diode respectively with the cathode of the 5th diode and the second variable-frequency pulse transformer
The other end of secondary windings is electrically connected, and the armature winding of the second variable-frequency pulse transformer connects AC power source.
Further, the frequency conversion dual-pulse power supply further includes fusible core, and the input of the fusible core terminates AC power source, described
The output of fusible core terminates the input terminal of the three facies tracts buckle releaser air switch.
Seen from the above description, by the way that fusible core is arranged, to prevent because certain reason leads to three facies tract buckle releaser air
Switch fault can not provide apparent physics breakpoint when separating brake, guarantee the reliability of frequency conversion dual-pulse power supply, during maintenance
Fusible core can be dismantled, be loaded on fusible core after the completion of maintenance, avoid leading to personal safety because of maloperation.
Further, the frequency conversion dual-pulse power supply further includes the first EMI circuit and the 2nd EMI circuit, the first EMI
The input of circuit terminates the output end of the first single-phase variable frequency inverter, the output termination of the first EMI circuit described the
The input of the input terminal of one variable-frequency pulse transformer, the 2nd EMI circuit terminates the defeated of the second single-phase variable frequency inverter
Outlet, the output of the 2nd EMI circuit terminate the input terminal of the second variable-frequency pulse transformer.
Seen from the above description, by the first EMI circuit of setting and the 2nd EMI circuit, the height of extraneous power grid can be filtered out
The interference of frequency pulse pair the first variable-frequency pulse transformer and the first variable-frequency pulse transformer, while also functioning to and reducing by the first frequency conversion arteries and veins
Transformer and the first variable-frequency pulse transformer itself are rushed to extraneous electromagnetic interference.
Referring to Fig.1 and 2, the embodiments of the present invention one are as follows:
A kind of frequency conversion dual-pulse power supply, including the filtering of three facies tract buckle releaser air switches 1, three-phase controlled rectifier 2, first
Device 3, second filter 4, the first single-phase variable frequency inverter 5, the second single-phase variable frequency inverter 6, dsp controller 13, the first frequency conversion
Pulse transformer 7, the second variable-frequency pulse transformer 8, the first frequency conversion dipulse rectifier 9, the second frequency conversion dipulse rectifier 10,
First pulse sampling circuit 11 and the second pulse sampling circuit 12；
The output end of the three facies tracts buckle releaser air switch 1 connect respectively the three-phase controlled rectifier 2 input terminal and
The input of the input terminal of dsp controller 13, the three facies tracts buckle releaser air switch 1 terminates three-phase alternating-current supply；
The output end of the three-phase controlled rectifier 2 connects the input terminal and second filter 4 of the first filter 3 respectively
Input terminal；
The output of the first filter 3 terminates the input terminal of the first single-phase variable frequency inverter 5, second filtering
The output of device 4 terminates the input terminal of the second single-phase variable frequency inverter 6；
The output of the first single-phase variable frequency inverter 5 terminates the input terminal of the first variable-frequency pulse transformer 7, described
The output of second single-phase variable frequency inverter 6 terminates the input terminal of the second variable-frequency pulse transformer 8；
The input of the first frequency conversion dipulse rectifier 9 terminates the output end of the first variable-frequency pulse transformer 7, institute
The input for stating the second frequency conversion dipulse rectifier 10 terminates the output end of the second variable-frequency pulse transformer 8, and described first becomes
The output of frequency dipulse rectifier 9 terminates the input terminal of first pulse sampling circuit 11, and the second frequency conversion dipulse is whole
The output for flowing device 10 terminates the input terminal of second pulse sampling circuit 12；
The input terminal of the dsp controller 13 connects output end and the second pulse of first pulse sampling circuit 11 respectively
The output end of sample circuit 12, the output end of the dsp controller 13 connect the input of the described first single-phase variable frequency inverter 5 respectively
The input terminal at end and the second single-phase variable frequency inverter 6.
The frequency conversion dual-pulse power supply further includes fusible core 15, the first EMI circuit 16 and the 2nd EMI circuit 17, the fusible core
15 input terminates AC power source, and the output of the fusible core 15 terminates the input terminal of the three facies tracts buckle releaser air switch 1, institute
The input for stating the first EMI circuit 16 terminates the output end of the first single-phase variable frequency inverter 5, the first EMI circuit 16
Output terminates the input terminal of the first variable-frequency pulse transformer 7, and the input termination described second of the 2nd EMI circuit 17 is single
The output of the output end of phase inverter inverter 6, the 2nd EMI circuit 17 terminates the defeated of the second variable-frequency pulse transformer 8
Enter end.
The first variable-frequency pulse transformer 7 includes armature winding and secondary windings, the second variable-frequency pulse transformer 8
Including armature winding and secondary windings, the first frequency conversion dipulse rectifier 9 includes first diode D1, the second diode
D2, third diode D3 and the 4th diode D4, the second frequency conversion dipulse rectifier 10 include the 5th diode D5, the 6th
Diode D6, the 7th diode D7 and the 8th diode D8, first pulse sampling circuit 11 include first resistor R1, second
Resistance R2 and 3rd resistor R3, second pulse sampling circuit 12 include second resistance R2,3rd resistor R3 and the 4th resistance
R4；
The armature winding of the first variable-frequency pulse transformer 7 connects AC power source, the first variable-frequency pulse transformer 7
One end of secondary windings is electrically connected with the anode of the cathode of the first diode D1 and third diode D3 respectively, and described first
The anode of diode D1 respectively with the anode of the second diode D2, one end of first resistor R1, the 4th resistance R4 one end,
The electrical connection of the cathode of the cathode of 5th diode D5 and the 6th diode D6, the cathode of the second diode D2 respectively with it is described
The other end of the secondary windings of the anode of 4th diode D4 and the first variable-frequency pulse transformer 7 is electrically connected, the four or two pole
The cathode of pipe D4 is electrically connected with one end of the cathode of the third diode D3 and second resistance R2 respectively, the first resistor R1
The other end be electrically connected with one end of the 3rd resistor R3, the other end of the second resistance R2 and the 3rd resistor R3's
Other end electrical connection, the other end of the 4th resistance R4 anode and the 8th diode D8 with the 7th diode D7 respectively
Anode electrical connection, the anode of the 5th diode D5 cathode and the second variable-frequency pulse with the 7th diode D7 respectively
One end of the secondary windings of transformer 8 is electrically connected, the other end of the secondary windings of the second variable-frequency pulse transformer 8 respectively with
The anode of the 6th diode D6 and the cathode of the 8th diode D8 are electrically connected, at the beginning of the second variable-frequency pulse transformer 8
Grade winding connects AC power source.
The basic voltage of the frequency conversion dual-pulse power supply that the present embodiment one designs in practical applications is 65Kv, and pulse voltage reaches
To 63Kv, 128Kv can reach by peak-peak voltage after superposition, wherein the repeatable frequency of pulse voltage reaches 836pps,
Pulse width 50us~198us, flashover number 1113 times per minute.
Referring to figure 3., the embodiments of the present invention two are as follows:
Embodiment two and the difference of embodiment one are: the frequency conversion dual-pulse power supply further includes the 7th resistance R7 and the 8th
Resistance R8, the first variable-frequency pulse transformer 7 include armature winding and secondary windings, the second variable-frequency pulse transformer 8
Including armature winding and secondary windings, the first frequency conversion dipulse rectifier 9 includes first diode D1, the second diode
D2, third diode D3 and the 4th diode D4, the second frequency conversion dipulse rectifier 10 include the 5th diode D5, the 6th
Diode D6, the 7th diode D7 and the 8th diode D8, first pulse sampling circuit 11 include first resistor R1, second
Resistance R2 and 3rd resistor R3, second pulse sampling circuit 12 include the 4th resistance R4, the 5th resistance R5 and the 6th resistance
R6；
The armature winding of the first variable-frequency pulse transformer 7 connects AC power source, the first variable-frequency pulse transformer 7
One end of secondary windings is electrically connected with the anode of the cathode of the first diode D1 and third diode D3 respectively, and described first
The anode of diode D1 respectively with the anode of the second diode D2, one end of first resistor R1 and one end of the 7th resistance R7
Electrical connection, the cathode of the second diode D2 respectively with the anode and the first variable-frequency pulse transformer of the 4th diode D4
The other end of 7 secondary windings is electrically connected, the cathode of the 4th diode D4 respectively with one end of the second resistance R2 and
The cathode of third diode D3 is electrically connected, and the other end of the first resistor R1 is electrically connected with one end of the 3rd resistor R3,
The other end of the 3rd resistor R3 is electrically connected with the other end of the second resistance R2, the other end of the 7th resistance R7 with
One end of the 8th resistance R8 is electrically connected, the other end of the 8th resistance R8 respectively with one end of the 4th resistance R4,
The electrical connection of the anode of the anode of 5th diode D5 and the 6th resistance R6, the cathode of the 6th diode D6 is respectively with described the
One end of the secondary windings of the anode of eight diode D8 and the second variable-frequency pulse transformer 8 is electrically connected, the 8th diode D8
Cathode be electrically connected respectively with the cathode of one end of the 6th resistance R6 and the 7th diode D7, the 7th diode D7's
The other end of the anode respectively with the cathode of the 5th diode D5 and the secondary windings of the second variable-frequency pulse transformer 8 is electrically connected
It connects, the other end of the 4th resistance R4 is electrically connected with one end of the 5th resistance R5, the other end of the 5th resistance R5
It is electrically connected respectively with the other end of the other end of the second resistance R2, the other end of 3rd resistor R3 and the 6th resistance R6, institute
The other end of the other end and the 6th resistance R6 of stating the 5th resistance R5 is grounded, the primary of the second variable-frequency pulse transformer 8
Winding connects AC power source.
Since field working conditions and electric field insulation variation cause electric field internal current bigger than normal in electric precipitation, when electric current reaches electricity
Even if voltage is unable to reach ceiling voltage when source electrode threshold currents, power supply can not also be further continued for increasing output, and existing power supply is all adopted
It is powered with separate unit or separate unit basic voltage is powered.Initial stage is created in electric field in order to which no load test electric field performance uses simultaneously substantially
Alliance electricity, and to realize that parallel operation has phase problem, current parallel operation solves the problems, such as that phase mostly uses two power supplys
The mode being in communication with each other realizes, poor reliability, and because communication delay causes certain phase difference, in electric field flashover
Probably due to wherein one do not detect that flashover signal causes arcing inside electric field to cause equipment damage.Therefore currently on the market
Electric dust-removing power supply parallel operation be not suitable for long-term work, when can only testing work half an hour within.The utility model makes
With a set of dsp controller, drives two power modules to control two transformers connected in parallel and power to an electric field, disobeyed in control
Rely communication, phase difference 0, while detecting flashover signal, will not arcing, can be with non-stop run, reliability is high.Therefore this reality
Have structure simple with novel, the characteristics of high reliablity.
The basic voltage of the frequency conversion dual-pulse power supply that the present embodiment two designs in practical applications is 65Kv, and pulse voltage reaches
To 42Kv, 128Kv is reached by peak-peak voltage after superposition, wherein the repeatable frequency of pulse voltage reaches 1033pps, arteries and veins
Rush width 50us~360us, flashover number 2362 times per minute.
Referring to figure 4., the embodiments of the present invention three are as follows:
Embodiment three and the difference of embodiment one are: the frequency conversion dual-pulse power supply further includes the 7th resistance R7 and the 8th
Resistance R8, the first variable-frequency pulse transformer 7 include armature winding and secondary windings, the second variable-frequency pulse transformer 8
Including armature winding and secondary windings, the first frequency conversion dipulse rectifier 9 includes first diode D1, the second diode
D2, third diode D3 and the 4th diode D4, the second frequency conversion dipulse rectifier 10 include the 5th diode D5, the 6th
Diode D6, the 7th diode D7 and the 8th diode D8, first pulse sampling circuit 11 include first resistor R1, second
Resistance R2 and 3rd resistor R3, second pulse sampling circuit 12 include the 4th resistance R4, the 5th resistance R5 and the 6th resistance
R6；
The armature winding of the first variable-frequency pulse transformer 7 connects AC power source, the first variable-frequency pulse transformer 7
One end of secondary windings is electrically connected with the anode of the cathode of the first diode D1 and third diode D3 respectively, and described first
The anode of diode D1 respectively with the anode of the second diode D2, one end of first resistor R1 and one end of the 7th resistance R7
Electrical connection, the cathode of the second diode D2 respectively with the anode and the first variable-frequency pulse transformer of the 4th diode D4
The other end of 7 secondary windings is electrically connected, the cathode of the 4th diode D4 cathode with the third diode D3 respectively
It being electrically connected with one end of second resistance R2, the other end of the first resistor R1 is electrically connected with one end of the 3rd resistor R3,
The other end of the second resistance R2 respectively with the other end of the 3rd resistor R3, one end of the 5th resistance R5 and the 6th resistance
One end of R6 is electrically connected, and one end of the 5th resistance R5 and one end ground connection of the 6th resistance R6, the 5th resistance R5's is another
One end is electrically connected with one end of the 4th resistance R4, and the other end of the 4th resistance R4 is respectively with the 8th resistance R8's
The anode of one end, the anode of the 5th diode D5 and the 6th diode D6 is electrically connected, the cathode difference of the 6th diode D6
It is electrically connected with one end of the anode of the 8th diode D8 and the secondary windings of the second variable-frequency pulse transformer 8, the described 8th
The cathode of diode D8 is electrically connected with the cathode of the other end of the 6th resistance R6 and the 7th diode D7 respectively, and the described 7th
The anode of diode D7 is another with the secondary windings of the cathode of the 5th diode D5 and the second variable-frequency pulse transformer 8 respectively
One end electrical connection, the armature winding of the second variable-frequency pulse transformer 8 connect AC power source, the other end of the 7th resistance R7
Disconnecting switch is connect respectively with the other end of the 8th resistance R8, and is connected to the cathode line of respective electric field by disconnecting switch respectively.
It is frequently encountered same field current phenomenon bigger than normal in electric precipitation, the area Liang Ge is divided by electric field, is provided
Two sets of power supplys make an original electric field form different voltage gradients, and field practice works well, but due to switchgear house
Space limitation, it is huge usually to implement cost, sometimes also cannot achieve, and the frequency conversion dual-pulse power supply of this programme design is equipped with
First variable-frequency pulse transformer and the second variable-frequency pulse transformer, can be good at nothing caused by solving switchgear house insufficient space
The problem of method electric field subregion independent power source, and low cost, facilitate implementation；And can power simultaneously to two different electric fields,
Save space, save the cost.
The basic voltage of the frequency conversion dual-pulse power supply that the present embodiment three designs in practical applications is 65Kv, and pulse voltage reaches
To 36Kv, 128Kv is reached by peak-peak voltage after superposition, wherein the repeatable frequency of pulse voltage reaches 836pps, arteries and veins
Rush width 50us~289us, flashover number 2360 times per minute.
In conclusion a kind of frequency conversion dual-pulse power supply provided by the utility model, the arteries and veins being superimposed with conventional capacitive coupling
It rushes power supply, conventional power frequency, high frequency electric source to compare, this programme is controllably whole by three facies tract buckle releaser air switches of setting, three-phase
Flow device, first filter, second filter, the first single-phase variable frequency inverter, the second single-phase variable frequency inverter, dsp controller, the
One variable-frequency pulse transformer, the second variable-frequency pulse transformer, the first frequency conversion dipulse rectifier, the rectification of the second frequency conversion dipulse
Device, the first pulse sampling circuit and the second pulse sampling circuit constitute frequency conversion dual-pulse power supply；By the first pulse sampling circuit
It is electrically connected respectively with dsp controller with the second pulse sampling circuit, DSP control is fed back to by different pulse sampling circuits
Device；The output end of dsp controller is defeated with the input terminal of the first single-phase variable frequency inverter and the second single-phase variable frequency inverter respectively
Enter end connection, can be believed by dsp controller to the first single-phase variable frequency inverter and the second single-phase variable frequency inverter output control
Number to adjust base voltage-frequency rate and amplitude, pulse frequency and amplitude.The base that the frequency conversion dual-pulse power supply of this programme design not only exports
Plinth voltage height and pulse voltage are high, and pulse repeats frequency can achieve 1000pps, flashover frequency be 1000 times/min and
Equipment is not damaged, frequent flashover inside electric precipitator is able to solve, so that the operation of frequency conversion dual-pulse power supply reaches reason
The emission reduction effect thought；And first variable-frequency pulse transformer and the connecting cable Industrial Frequency Transformer that can reuse original and original
Cable, the second variable-frequency pulse volume of transformer are a quarters of Industrial Frequency Transformer, and cost is extremely low；Transformer and loading control member
The control cabinet of part separates, outside transformer holding chamber, and (electronic component is in the relatively good room of environment with interior for control cabinet placement
It is interior, increase reliability), the two can reach 600 meters apart from maximum, support online transformation is reduced to shut down transformation bring production capacity damage
It loses, while also greatly improving the maintainability of equipment.In addition, the frequency conversion dual-pulse power supply of this programme design is widely used, it was both
It can be applied to newly-built deduster construction, also can be applied to old electric field transformation.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technology neck
Domain is also included in the patent protection scope of the utility model.
Claims (6)
1. a kind of frequency conversion dual-pulse power supply, which is characterized in that including three facies tract buckle releaser air switches, three-phase controlled rectifier,
First filter, second filter, the first single-phase variable frequency inverter, the second single-phase variable frequency inverter, dsp controller, first become
Frequency pulse transformer, the second variable-frequency pulse transformer, the first frequency conversion dipulse rectifier, the second frequency conversion dipulse rectifier,
One pulse sampling circuit and the second pulse sampling circuit；
The output end of the three facies tracts buckle releaser air switch connects input terminal and the DSP control of the three-phase controlled rectifier respectively
The input of the input terminal of device, the three facies tracts buckle releaser air switch terminates three-phase alternating-current supply；
The output end of the three-phase controlled rectifier connects the input terminal of the first filter and the input of second filter respectively
End；
The output of the first filter terminates the input terminal of the first single-phase variable frequency inverter, the second filter it is defeated
The input terminal of the described second single-phase variable frequency inverter is terminated out；
The output of the first single-phase variable frequency inverter terminates the input terminal of the first variable-frequency pulse transformer, and described second is single
The output of phase inverter inverter terminates the input terminal of the second variable-frequency pulse transformer；
The output end of input termination the first variable-frequency pulse transformer of the first frequency conversion dipulse rectifier, described second
The input of frequency conversion dipulse rectifier terminates the output end of the second variable-frequency pulse transformer, and the first frequency conversion dipulse is whole
The output for flowing device terminates the input terminal of first pulse sampling circuit, the output termination of the second frequency conversion dipulse rectifier
The input terminal of second pulse sampling circuit；
The input terminal of the dsp controller connects the output end and the second pulse sampling circuit of first pulse sampling circuit respectively
Output end, the output end of the dsp controller connects the input terminal of the described first single-phase variable frequency inverter and second single-phase respectively
The input terminal of variable frequency inverter.
2. frequency conversion dual-pulse power supply according to claim 1, which is characterized in that the first variable-frequency pulse transformer includes
Armature winding and secondary windings, the second variable-frequency pulse transformer include armature winding and secondary windings, first frequency conversion
Dipulse rectifier includes first diode, the second diode, third diode and the 4th diode, the double arteries and veins of second frequency conversion
Rushing rectifier includes the 5th diode, the 6th diode, the 7th diode and the 8th diode, first pulse sampling circuit
Including first resistor, second resistance and 3rd resistor, second pulse sampling circuit includes second resistance, 3rd resistor and
Four resistance；
The armature winding of the first variable-frequency pulse transformer connects AC power source, the first variable-frequency pulse transformer it is secondary around
One end of group is electrically connected with the anode of the cathode of the first diode and third diode respectively, the sun of the first diode
Pole respectively with the anode of second diode, one end of first resistor, one end of the 4th resistance, the 5th diode cathode and
The cathode of 6th diode is electrically connected, and the cathode of second diode becomes with the anode of the 4th diode and first respectively
The other end of the secondary windings of frequency pulse transformer is electrically connected, the cathode of the 4th diode respectively with the third diode
Cathode and second resistance one end electrical connection, the other end of the first resistor is electrically connected with one end of the 3rd resistor,
The other end of the second resistance is electrically connected with the other end of the 3rd resistor, the other end of the 4th resistance respectively with institute
The anode electrical connection of the anode and the 8th diode of the 7th diode is stated, the anode of the 5th diode is respectively with the described 7th
One end of the secondary windings of the cathode of diode and the second variable-frequency pulse transformer is electrically connected, the second variable-frequency pulse transformer
The other end of secondary windings be electrically connected respectively with the cathode of the anode of the 6th diode and the 8th diode, described second
The armature winding of variable-frequency pulse transformer connects AC power source.
3. frequency conversion dual-pulse power supply according to claim 1, which is characterized in that the frequency conversion dual-pulse power supply further includes
Seven resistance and the 8th resistance, the first variable-frequency pulse transformer include armature winding and secondary windings, the second frequency conversion arteries and veins
Rushing transformer includes armature winding and secondary windings, and the first frequency conversion dipulse rectifier includes first diode, the two or two
Pole pipe, third diode and the 4th diode, the second frequency conversion dipulse rectifier include the 5th diode, the six or two pole
Pipe, the 7th diode and the 8th diode, first pulse sampling circuit include first resistor, second resistance and third electricity
Resistance, second pulse sampling circuit include the 4th resistance, the 5th resistance and the 6th resistance；
The armature winding of the first variable-frequency pulse transformer connects AC power source, the first variable-frequency pulse transformer it is secondary around
One end of group is electrically connected with the anode of the cathode of the first diode and third diode respectively, the sun of the first diode
Pole is electrically connected with one end of the anode of second diode, one end of first resistor and the 7th resistance respectively, and the described 2nd 2
The cathode of pole pipe is electric with the other end of the anode of the 4th diode and the secondary windings of the first variable-frequency pulse transformer respectively
Connection, the cathode of the 4th diode are electrically connected with the cathode of one end of the second resistance and third diode respectively, institute
The other end for stating first resistor is electrically connected with one end of the 3rd resistor, the other end of the 3rd resistor and second electricity
The other end of resistance is electrically connected, and the other end of the 7th resistance is electrically connected with one end of the 8th resistance, the 8th resistance
The other end be electrically connected respectively with one end, the anode of the 5th diode and the anode of the 6th resistance of the 4th resistance, it is described
The cathode of 6th diode respectively with the anode of the 8th diode and the secondary windings of the second variable-frequency pulse transformer one
End electrical connection, cathode of the cathode of the 8th diode respectively with one end of the 6th resistance and the 7th diode are electrically connected
Connect, the anode of the 7th diode respectively with the cathode of the 5th diode and the second variable-frequency pulse transformer it is secondary around
The other end electrical connection of group, the other end of the 4th resistance are electrically connected with one end of the 5th resistance, the 5th resistance
The other end be electrically connected respectively with the other end of the other end of the second resistance, the other end of 3rd resistor and the 6th resistance,
The other end of 5th resistance and the other end of the 6th resistance are grounded, the armature winding of the second variable-frequency pulse transformer
Connect AC power source.
4. frequency conversion dual-pulse power supply according to claim 1, which is characterized in that the frequency conversion dual-pulse power supply further includes
Seven resistance and the 8th resistance, the first variable-frequency pulse transformer include armature winding and secondary windings, the second frequency conversion arteries and veins
Rushing transformer includes armature winding and secondary windings, and the first frequency conversion dipulse rectifier includes first diode, the two or two
Pole pipe, third diode and the 4th diode, the second frequency conversion dipulse rectifier include the 5th diode, the six or two pole
Pipe, the 7th diode and the 8th diode, first pulse sampling circuit include first resistor, second resistance and third electricity
Resistance, second pulse sampling circuit include the 4th resistance, the 5th resistance and the 6th resistance；
The armature winding of the first variable-frequency pulse transformer connects AC power source, the first variable-frequency pulse transformer it is secondary around
One end of group is electrically connected with the anode of the cathode of the first diode and third diode respectively, the sun of the first diode
Pole is electrically connected with one end of the anode of second diode, one end of first resistor and the 7th resistance respectively, and the described 2nd 2
The cathode of pole pipe is electric with the other end of the anode of the 4th diode and the secondary windings of the first variable-frequency pulse transformer respectively
Connection, the cathode of the 4th diode are electrically connected with one end of the cathode of the third diode and second resistance respectively, institute
The other end for stating first resistor is electrically connected with one end of the 3rd resistor, and the other end of the second resistance is respectively with described
One end of the other end of three resistance, one end of the 5th resistance and the 6th resistance is electrically connected, one end and the 6th of the 5th resistance
One end of resistance is grounded, and the other end of the 5th resistance is electrically connected with one end of the 4th resistance, the 4th resistance
The other end is electrically connected with one end, the anode of the 5th diode and the anode of the 6th diode of the 8th resistance respectively, described
The cathode of 6th diode respectively with the anode of the 8th diode and the secondary windings of the second variable-frequency pulse transformer one
End electrical connection, cathode of the cathode of the 8th diode respectively with the other end of the 6th resistance and the 7th diode are electrically connected
Connect, the anode of the 7th diode respectively with the cathode of the 5th diode and the second variable-frequency pulse transformer it is secondary around
The other end electrical connection of group, the armature winding of the second variable-frequency pulse transformer connect AC power source.
5. frequency conversion dual-pulse power supply according to claim 1, which is characterized in that the frequency conversion dual-pulse power supply further includes melting
Core, the input of the fusible core terminate AC power source, and the output of the fusible core terminates the defeated of the three facies tracts buckle releaser air switch
Enter end.
6. frequency conversion dual-pulse power supply according to claim 1, which is characterized in that the frequency conversion dual-pulse power supply further includes
One EMI circuit and the 2nd EMI circuit, the input of the first EMI circuit terminate the output of the first single-phase variable frequency inverter
End, the output of the first EMI circuit terminate the input terminal of the first variable-frequency pulse transformer, the 2nd EMI circuit
Input terminates the output end of the second single-phase variable frequency inverter, and the output of the 2nd EMI circuit terminates second frequency conversion
The input terminal of pulse transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920196442.6U CN209613252U (en) | 2019-02-14 | 2019-02-14 | A kind of frequency conversion dual-pulse power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920196442.6U CN209613252U (en) | 2019-02-14 | 2019-02-14 | A kind of frequency conversion dual-pulse power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209613252U true CN209613252U (en) | 2019-11-12 |
Family
ID=68453454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920196442.6U Active CN209613252U (en) | 2019-02-14 | 2019-02-14 | A kind of frequency conversion dual-pulse power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209613252U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663669A (en) * | 2019-02-14 | 2019-04-23 | 厦门锐传科技有限公司 | A kind of frequency conversion dual-pulse power supply |
-
2019
- 2019-02-14 CN CN201920196442.6U patent/CN209613252U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663669A (en) * | 2019-02-14 | 2019-04-23 | 厦门锐传科技有限公司 | A kind of frequency conversion dual-pulse power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201724988U (en) | Input phase failure detector for power unit of high-voltage frequency converter | |
| CN103399215B (en) | Phase-lack and low-voltage detection circuit for three-phase alternating current | |
| CN101325366A (en) | Circuit with protective circuit for correcting active power factor | |
| CN209233734U (en) | The power module of frequency converter | |
| CN201749157U (en) | Frequency converter power module test circuit of wind driven generator | |
| CN109560708A (en) | A kind of CNC high-pressure direct current generating device and method | |
| CN105915068B (en) | A kind of dedusting power control method, apparatus and system | |
| CN209613252U (en) | A kind of frequency conversion dual-pulse power supply | |
| CN201616764U (en) | High-voltage direct-current power supply controlled by frequency converter | |
| CN208862564U (en) | A kind of photovoltaic DC-to-AC converter lightning protection device | |
| CN204858542U (en) | Active state type neutral point earthing device | |
| CN202066930U (en) | Test system for loading of frequency converter | |
| CN109663669A (en) | A kind of frequency conversion dual-pulse power supply | |
| CN102882393B (en) | Power supply device for converter valve of static VAR generator | |
| CN208904870U (en) | The power module of frequency converter | |
| CN208561318U (en) | The device and system of elevator device power supply are realized based on elevator power supply device | |
| CN110190760A (en) | High pressure generator fairing | |
| CN102957311A (en) | Anti-electromagnetic interference system of megawatt-level wind power converter | |
| CN206135742U (en) | High frequency power supply for electric precipitation | |
| CN106443268A (en) | Low-voltage ride-through capability detection device and method of low-voltage auxiliary engine frequency converter of thermal power plant | |
| CN208085523U (en) | Railway contact line electricity getting system | |
| CN202930939U (en) | Intelligent type three phase electricity-saving appliance | |
| CN204244087U (en) | A kind of motor test electric supply installation with transformer and filter | |
| CN208283489U (en) | A kind of offline testing device of subway train subordinate inverter module | |
| CN102545223A (en) | High-voltage dynamic filtering power-saving device for mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |