CN105119469B - Multi-path driving signal switching circuit and method for mining explosion-proof frequency converter - Google Patents
Multi-path driving signal switching circuit and method for mining explosion-proof frequency converter Download PDFInfo
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- CN105119469B CN105119469B CN201510538425.2A CN201510538425A CN105119469B CN 105119469 B CN105119469 B CN 105119469B CN 201510538425 A CN201510538425 A CN 201510538425A CN 105119469 B CN105119469 B CN 105119469B
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- 238000005065 mining Methods 0.000 title claims abstract description 12
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- 238000004880 explosion Methods 0.000 claims description 10
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Abstract
The invention relates to the technical field of explosion-proof frequency converters, and discloses a multi-path driving signal switching circuit and a switching method for a mining explosion-proof frequency converter, wherein a first upper bridge arm photoelectric converter 1 and a first lower bridge arm photoelectric converter which are connected with an upper computer controller 6 are connected with a multi-path parallel signal processing interface circuit 5 through a logic interlocking circuit 2, and the driving output end and the signal input end of the multi-path parallel signal processing interface circuit 5 are respectively connected with a fully-controlled switching element 7; the signal output end of the multi-path parallel signal processing interface circuit 5 is connected with an upper computer controller 6 through an indication display circuit 4 and a second upper and lower bridge arm photoelectric converter 2; the output end of the first upper and lower bridge arm photoelectric converter 1 is connected with the indication display circuit 4. The invention can effectively improve the performance of the system. The modularized and functional design idea enhances the expandability of the system and has strong universality while accurately processing the multi-path parallel driving signals.
Description
Technical field
The present invention relates to explosion-proof frequency converter technical fields more particularly to a kind of mining anti-explosion frequency converter multi-channel drive signal to turn
Connect circuit and method.
Background technique
For underground special occasions, currently used voltage class is mainly 660V/1140V, however coal mine hoist, skin
Driving motor with machine, scrapper conveyor also tends to high-power, high-power, low-voltage, certainly will lead to high current, however switching tube list
Permitted operating current is managed to be limited, according to circuit theory --- parallel circuit total current is equal to each parallel branch electric current
The sum of, paralleled power switches, which construct single-phase circuit, just becomes a kind of feasible scheme to solve the above problems.However, how to guarantee simultaneously
Connection switching tube can be simultaneously turned on, be turned off, and just again at another urgent problem to be solved, current existing mine-used frequency-converter is more
Road driving signal switching circuit board generallys use discrete component, and signal collection is not comprehensive enough, not only increases in this way
Cost also reduces the reliability of overall performance.It is easy to cause switching tube to break down, causes heavy economic losses.
Summary of the invention
It is not high that there are reliabilities in order to overcome existing mine-used frequency-converter multi-channel drive signal switching circuit board, at high cost
Problem, the invention proposes a kind of mine-used frequency-converter multi-channel drive signal built-up circuit and methods, are replaced using integrated chip
Discrete component, and increase switching tube fault-signal channel, the performance of system can be effectively improved.
The present invention solves its technical problem, and used technical solution is：
A kind of mining anti-explosion frequency converter multi-channel drive signal built-up circuit, including：First upper and lower bridge arm photoelectric converter 1,
Second upper and lower bridge arm photoelectric converter 2, logical interlock circuit 3, instruction display circuit 4, multi-channel parallel signal processing interface circuit
5, the first upper and lower bridge arm photoelectric converter 1 of connection supervisory controller 6 passes through at logical interlock circuit 2 and multi-channel parallel signal
Interface circuit 5 is managed to be connected, the drive output of multi-channel parallel signal processing interface circuit 5, signal input part respectively with full-control type
Switch element 7 is connected；The signal output end of multi-channel parallel signal processing interface circuit 5 passes through instruction display circuit 4, about second
Bridge arm photoelectric converter 2 is connected with supervisory controller 6；Wherein, 1 output end of the first upper and lower bridge arm photoelectric converter and instruction are aobvious
Show that circuit 4 is connected.
A kind of mining anti-explosion frequency converter multi-channel drive signal built-up circuit, the logical interlock circuit 3, including：NOT gate electricity
Road 8, capacitor charge and discharge circuit 9, AND gate circuit 10, the not circuit pass through 10 electricity of capacitor charge and discharge circuit 9 and AND gate circuit
Connection；The not circuit 8 is six reverse phase Schmitt triggers, and the AND gate circuit 10 is four group of two input terminal AND gate circuit
（10）.
A kind of mining anti-explosion frequency converter multi-channel drive signal forwarding method, its step are as follows：
1）, host computer/controller（6）Two-way driving optical signal pass through photoelectric converter（1）Obtain corresponding electric mould
Quasi- signal,
2）, using logical interlock circuit（3）Corresponding logical process is carried out to its electric analoging signal, obtaining 1 tunnel has
The complementary signal of Dead Zone,
3）, using multi-channel parallel signal processing interface circuit（5）Processing, if single-phase bridge arm needs n single tube switching tube
2 tunnels then there is the complementary signal of Dead Zone to be extended to the road n/2 complementary signal by parallel connection,
4）, finally by multi-channel parallel signal processing interface circuit（5）The obtained road n/2 complementary drive signals are passed by winding displacement
Give full-controlled switch component（7）, drive the conducting and shutdown of main circuit of converter switching tube.
5）And full-controlled switch component（7）The fault-signal that detects of driving plate pass through at multi-channel parallel signal
Manage interface circuit（5）Feed back instruction display circuit（4）, meanwhile, by photoelectric converter（1）Obtained driving signal is also passed to
Indicate display circuit（4）, so indicate display circuit（4）Not only can whether normal with display drive signals, but also can show whether have
Failure occurs,
6）, finally indicate display circuit（4）Fault-signal is exported to photoelectric converter（2）, convert electrical signals to light letter
Number feed back to host computer/controller（6）.
A kind of mining anti-explosion frequency converter multi-channel drive signal forwarding method, the photoelectric converter（1）The electric signal of output,
It is first transmitted to six reverse phase Schmitt triggers（8）, it is carried out to negate processing, then passes through capacitor charge and discharge circuit（9）It will
Complementary signal increases dead time, finally passes through four group of two input terminal AND gate circuit（10）Processing obtain it is required have it is dead
The complementary driving signal of zone properties.
Due to the adoption of the technical scheme as described above, of the invention to have the following advantages：
A kind of mine-used frequency-converter multi-channel drive signal built-up circuit and method, discrete member device is replaced using integrated chip
Part, and increase switching tube fault-signal channel, the performance of system can be effectively improved.In accurately processing multi-channel parallel driving
While signal, modularization, functionalized design thinking enhance the scalability of system, have very strong versatility.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is multi-channel drive signal built-up circuit block diagram.
Fig. 2 is logical interlock circuit block diagram.
1 in figure, driving signal photoelectric converter, 2, fault-signal photoelectric converter, 3, logical interlock circuit, 4, instruction it is aobvious
Show circuit, 5, multi-channel parallel signal processing interface circuit, 6, host computer/controller, 7, full-controlled switch component, 8, six reverse phases
Schmitt trigger, 9, capacitor charge and discharge circuit, 10, four group of two input terminal AND gate circuit.
Specific embodiment
As shown in Figure 1, 2, a kind of mining anti-explosion frequency converter multi-channel drive signal built-up circuit, including：First upper and lower bridge arm
Photoelectric converter 1, the second upper and lower bridge arm photoelectric converter 2, logical interlock circuit 3, instruction display circuit 4, multi-channel parallel signal
First upper and lower bridge arm photoelectric converter 1 of Processing Interface circuit 5, connection supervisory controller 6 passes through logical interlock circuit 2 and more
Road parallel signal Processing Interface circuit 5 is connected, the drive output of multi-channel parallel signal processing interface circuit 5, signal input part
It is connected respectively with full-controlled switching element 7；The signal output end of multi-channel parallel signal processing interface circuit 5 passes through instruction display electricity
Road 4, the second upper and lower bridge arm photoelectric converter 2 are connected with supervisory controller 6；Wherein, the first upper and lower bridge arm photoelectric converter 1 is defeated
Outlet is connected with instruction display circuit 4.
The logical interlock circuit 3, including：Not circuit 8, capacitor charge and discharge circuit 9, AND gate circuit 10, the NOT gate
Circuit is electrically connected by capacitor charge and discharge circuit 9 with AND gate circuit 10；The not circuit 8 is six reverse phase Schmitt triggers,
The AND gate circuit 10 is four group of two input terminal AND gate circuit.
In Fig. 1, host computer/controller（6）Two-way driving optical signal pass through photoelectric converter（1）It obtains corresponding
Electric analoging signal passes through logical interlock circuit later（3）Corresponding logical process is carried out to it, obtains 1 tunnel with Dead Zone
Complementary signal, using multi-channel parallel signal processing interface circuit（5）Processing, if single-phase bridge arm needs n single tube switching tube
2 tunnels then there is the complementary signal of Dead Zone to be extended to the road n/2 complementary signal, finally by multi-channel parallel signal processing by parallel connection
Interface circuit（5）The obtained road n/2 complementary drive signals send full-controlled switch component to by winding displacement（7）, drive frequency conversion
The conducting and shutdown of device main circuit switch pipe.In addition, full-controlled switch component（7）The fault-signal that detects of driving plate it is logical
Cross multichannel parallel signal Processing Interface circuit（5）Feed back instruction display circuit（4）, meanwhile, by photoelectric converter（1）It obtains
Driving signal is also passed to instruction display circuit（4）, so indicate display circuit（4）It both can be with display drive signals whether just
Often, but can show whether faulty appearance, finally indicate display circuit（4）Fault-signal is exported to photoelectric converter（2）, will
Electric signal is converted to optical signal feedback to host computer/controller（6）.
In Fig. 2, photoelectric converter（1）The electric signal of output is first transmitted to six reverse phase Schmitt triggers（8）, to it
It carries out negating processing, then passes through capacitor charge and discharge circuit（9）Complementary signal is increased into dead time, finally passes through four group two
Input terminal AND gate circuit（10）Processing obtain the required complementary driving signal with Dead Zone.
Claims (3)
1. a kind of mining anti-explosion frequency converter multi-channel drive signal built-up circuit, it is characterized in that：Including：First upper and lower bridge arm photoelectricity turns
Parallel operation（1）, the second upper and lower bridge arm photoelectric converter（2）, logical interlock circuit（3）, instruction display circuit（4）, multi-channel parallel letter
Number Processing Interface circuit（5）, connect supervisory controller（6）The first upper and lower bridge arm photoelectric converter（1）Pass through logical interlock
Circuit（3）With multi-channel parallel signal processing interface circuit（5）It is connected, multi-channel parallel signal processing interface circuit（5）Driving it is defeated
Outlet, signal input part respectively with full-controlled switching element（7）It is connected；Multi-channel parallel signal processing interface circuit（5）Signal
Output end passes through instruction display circuit（4）, the second upper and lower bridge arm photoelectric converter（2）With supervisory controller（6）It is connected；Its
In, the first upper and lower bridge arm photoelectric converter（1）Output end and instruction display circuit（4）It is connected；The logical interlock circuit（3）,
Including：Not circuit（8）, capacitor charge and discharge circuit（9）, AND gate circuit（10）, it is electric that the not circuit passes through capacitor charge and discharge
Road（9）With AND gate circuit（10）Electrical connection；The not circuit（8）For six reverse phase Schmitt triggers, the AND gate circuit
（10）For four group of two input terminal AND gate circuit（10）.
2. special using a kind of forwarding method of mining anti-explosion frequency converter multi-channel drive signal built-up circuit described in claim 1
Sign is：Its step are as follows：
1）, supervisory controller（6）Two-way driving optical signal pass through the first upper and lower bridge arm photoelectric converter（1）It obtains corresponding
Electric analoging signal；
2）, using logical interlock circuit（3）Corresponding logical process is carried out to its electric analoging signal, obtains 1 tunnel with dead zone
The complementary signal of characteristic；
3）, using multi-channel parallel signal processing interface circuit（5）Processing, if the first upper and lower bridge arm of single-phase bridge arm, on second
Lower bridge arm needs n single tube paralleled power switches, then there is the complementary signal of Dead Zone to be extended to the road n/2 complementary drive 2 tunnels
Signal；
4）, finally by multi-channel parallel signal processing interface circuit（5）The obtained road n/2 complementary drive signals are sent to by winding displacement
Full-controlled switching element（7）, drive the conducting and shutdown of main circuit of converter switching tube；
5）And full-controlled switching element（7）The fault-signal that detects of driving plate pass through multi-channel parallel signal processing interface
Circuit（5）Feed back instruction display circuit（4）, meanwhile, by the first upper and lower bridge arm photoelectric converter（1）Obtained driving signal
Send instruction display circuit to（4）, so indicate display circuit（4）Not only can whether normal with display drive signals, but also can show
Whether faulty appearance；
6）, finally indicate display circuit（4）Fault-signal is exported to the second upper and lower bridge arm photoelectric converter（2）, electric signal is turned
Optical signal feedback is changed to supervisory controller（6）.
3. a kind of forwarding method of mining anti-explosion frequency converter multi-channel drive signal built-up circuit according to claim 2,
It is characterized in：The first upper and lower bridge arm photoelectric converter（1）The electric signal of output is first transmitted to six reverse phase Schmitt triggers
（8）, it is carried out to negate processing, then passes through capacitor charge and discharge circuit（9）Complementary signal is increased into dead time, is most passed through afterwards
Cross four group of two input terminal AND gate circuit（10）Processing obtain the required complementary driving signal with Dead Zone.
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| CN201510538425.2A CN105119469B (en) | 2015-08-28 | 2015-08-28 | Multi-path driving signal switching circuit and method for mining explosion-proof frequency converter |
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| CN201510538425.2A CN105119469B (en) | 2015-08-28 | 2015-08-28 | Multi-path driving signal switching circuit and method for mining explosion-proof frequency converter |
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| CN105119469B true CN105119469B (en) | 2018-11-30 |
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| CN105471234B (en) * | 2015-12-16 | 2018-02-23 | 山西惠特科技有限公司 | Fiber-optic signal change-over circuit for the driving of 3300V high-power IGBTs |
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| CN205178857U (en) * | 2015-08-28 | 2016-04-20 | 洛阳中重自动化工程有限责任公司 | Multi-path driving signal switching circuit of mining explosion-proof frequency converter |
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| CN102263490A (en) * | 2011-08-09 | 2011-11-30 | 湖南中科电气股份有限公司 | High-voltage frequency converter power unit drive-pulse transmission and communication system |
| CN102710103B (en) * | 2012-05-24 | 2014-11-26 | 中国矿业大学 | Double-circuit high-voltage large power IGBT (Insulated Gate Bipolar Translator) drive circuit |
| CN103532357A (en) * | 2012-07-04 | 2014-01-22 | 北京精密机电控制设备研究所 | MOSFET-based power driving circuit |
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