CN105162309A - Passive alternating current/direct current energized display circuit and method for explosion-proof frequency converter used in mines - Google Patents
Passive alternating current/direct current energized display circuit and method for explosion-proof frequency converter used in mines Download PDFInfo
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- CN105162309A CN105162309A CN201510538429.0A CN201510538429A CN105162309A CN 105162309 A CN105162309 A CN 105162309A CN 201510538429 A CN201510538429 A CN 201510538429A CN 105162309 A CN105162309 A CN 105162309A
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Abstract
The invention relates to the technical field of an explosion-proof frequency converter, and discloses a passive alternating current/direct current energized display circuit and method for an explosion-proof frequency converter used in mines. The passive alternating current/direct current energized display circuit adopted by the method comprises a passive alternating current energized display circuit, a passive direct current energized display circuit and a PCB; the passive alternating current energized display circuit on the PCB is connected with main loop incoming line three-phase alternating current power supplies R, S and T through A, B and C electrodes; and the passive direct current energized display circuit on the PCB is connected with the positive electrode and the negative electrode of a direct current bus through a positive electrode and a negative electrode. The adopted passive alternating current/direct current energized display circuit in the invention has the characteristics of small volume, wide indication voltage scope and high reliability.
Description
Technical field
The present invention relates to explosion-proof frequency converter technical field, especially relate to a kind of charged display circuit of the passive alternating current-direct current of mine explosion-proof frequency converter of underground coal mine and method.
Background technology
At present, explosion-proof frequency converter is as a kind of novel energy-saving environment-friendly product, more and more general in the application in the inflammable and explosive property such as underground coal mine, dust atmosphere place.According to the technological requirement of mine hoist, also need to realize four quadrant running while speed governing.But, underground coal mine bad environments, hot and humid, and to space and safety requirements extremely harsh, explosion-proof frequency converter should realize flame proof to ensure safety, realizes frequency control performance again, to meet technological requirement and energy-saving index, temperature rise, EMC, reliability, installation and maintenance simplification, body hold the problems such as ratio, speed ratio and have become the short slab of product design, especially be applied in mine hoist occasion, if these short slabs process bad, very big hidden danger will be brought to Safety of Coal Mine Production.
According to the requirement of underground coal mine peace mark, explosion-proof casing can be opened after power-off and carry out operation and maintenance, therefore safety interlock or warning marker must be set and be in dissengaged positions with power supply before ensureing to open explosion-proof casing.Existing explosion-proof frequency converter is most of without charged display, or adopts active charged display, namely cannot continue index strip electricity condition after power-off, there is great potential safety hazard.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention proposes the charged display circuit of the passive alternating current-direct current of a kind of mine explosion-proof frequency converter and method.
For solving the problems of the technologies described above, the invention provides following technical scheme:
The charged display circuit of a kind of passive alternating current-direct current of mine explosion-proof frequency converter, comprise: the charged display circuit of passive interchange, the charged display circuit of passive direct current, pcb board, the charged display circuit of passive interchange on described pcb board is connected with three phase mains by A, B, C electrode, and the charged display circuit of passive direct current on described pcb board is connected with DC power supply by positive and negative electrode.
The charged display circuit of a kind of passive alternating current-direct current of mine explosion-proof frequency converter, the charged display circuit of described passive interchange, by three groups of illuminating circuit Y-connections, often organizes illuminating circuit in series by current-limiting resistor voltage divider (5) and light-emitting diode (6).
The charged display circuit of a kind of passive alternating current-direct current of mine hoist explosion-proof frequency converter, the charged display circuit of described passive direct current is made up of current-limiting resistor voltage divider (5), light-emitting diode (6) and voltage stabilizing didoe (7), n current-limiting resistor voltage divider R one end is connected with DC power supply positive electrode, and n the current-limiting resistor voltage divider R other end is connected with the positive pole of voltage stabilizing didoe (7) by light-emitting diode (6);
Wherein, the first voltage stabilizing didoe (7) is to the n-th voltage stabilizing didoe (7) for being connected in series, and the negative pole of the n-th voltage stabilizing didoe (7) is connected with DC power cathode.
The charged display packing of a kind of passive alternating current-direct current of mine explosion-proof frequency converter, its step is as follows:
1) circuit is connected directly between major loop inlet wire AC power R, S, T(660V/1140VAC) side and DC bus positive and negative electrode (1100V/1900VDC), by the dividing potential drop of n resistance R and the voltage stabilizing of voltage stabilizing circuit WY, low-tension supply is supplied to LED and carries out the charged display independently of AC three-phase, direct current two-phase;
2) in the frequency converter course of work, DC energy storage circuit preserves electric energy, by charged for passive direct current display circuit directly in parallel and DC side positive and negative electrode, makes it bear accumulator voltage;
When frequency converter normally works, both positive and negative polarity bears full-load voltage, and voltage stabilizing didoe WY0-WY9 on average bears full-load voltage, LED 4-LED13 ON operation;
When DC energy storage voltage drop is low to moderate 1800V, voltage stabilizing didoe WY9 does not meet turn-on condition, then corresponding with it LED 4 can not work, and can see that direct voltage reduces like this from frequency converter box panel;
After frequency converter quits work power-off, along with the carrying out of discharge process, DC energy storage voltage is in reduction state always, so corresponding voltage stabilizing didoe (7) turns off step by step, and then corresponding light-emitting diode (6) also quits work with it, for this reason, frequency converter box front panel also can indicate the process that power supply electric energy is decayed, observation frequency converter direct current electriferous state;
Simultaneously for ensureing safety, if display circuit fault, resistance will be made to blow and become open circuit, automatic and major loop disconnects, and avoids failure propagation.
The charged display packing of a kind of passive alternating current-direct current of mine explosion-proof frequency converter, described circuit also has good versatility and transplantability, for different electric pressures, select the number of voltage stabilizing didoe (7) model, number and the light-emitting diode (6) matched can realize charged Presentation Function.
The charged display packing of a kind of passive alternating current-direct current of mine explosion-proof frequency converter, described circuit also have select the current-limiting resistor voltage divider (5) of different size according to different electric pressures, voltage stabilizing didoe (7) can meet charged Presentation Function.
Owing to adopting technical scheme as above, of the present invention have following superiority:
A kind of charged display circuit of the passive alternating current-direct current of mine explosion-proof frequency converter and method, have the feature that volume is little, instructed voltage wide ranges, reliability are high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is explosion-proof frequency converter case overall structure schematic diagram;
Fig. 2 is the charged display circuit block diagram of passive alternating current-direct current;
Fig. 3 is the charged display circuit schematic diagram of passive interchange;
Fig. 4 is the charged display circuit schematic diagram of passive direct current.
1. frequency converter box housings, 2. button fly front, the 3. charged display circuit of passive alternating current-direct current, 4. touch-screen, 5. current-limiting resistor voltage divider, 6. light-emitting diode, 7. voltage stabilizing didoe in figure.
Embodiment
As shown in Figure 1,2,3, 4, the charged display circuit of a kind of passive alternating current-direct current of mine explosion-proof frequency converter, comprise: the charged display circuit of passive interchange, the charged display circuit of passive direct current, pcb board, the charged display circuit of passive interchange on described pcb board is connected with three phase mains by A, B, C electrode, and the charged display circuit of passive direct current on described pcb board is connected with DC power supply by positive and negative electrode.The charged display circuit of described passive interchange, by three groups of illuminating circuit Y-connections, often organizes illuminating circuit in series by current-limiting resistor voltage divider (5) and light-emitting diode (6).The charged display circuit of described passive direct current is made up of current-limiting resistor voltage divider (5), light-emitting diode (6) and voltage stabilizing didoe (7), n current-limiting resistor voltage divider R one end is connected with DC power supply positive electrode, and n the current-limiting resistor voltage divider R other end is connected with the positive pole of voltage stabilizing didoe (7) by light-emitting diode (6);
Wherein, the first voltage stabilizing didoe (7) is to the n-th voltage stabilizing didoe (7) for being connected in series, and the negative pole of the n-th voltage stabilizing didoe (7) is connected with DC power cathode.
In FIG, frequency converter box (1), button fly front (2), the charged display circuit of passive alternating current-direct current (3) and touch-screen (4) form explosion-proof frequency converter jointly, and wherein the charged display circuit of passive alternating current-direct current (3) and touch-screen (4) outer surface are by toughened glass, rubber blanket and steel ring encapsulation process.
In fig. 2, the charged display circuit of this passive alternating current-direct current is in order to show explosion-proof frequency converter electriferous state., be made up of current-limiting resistor voltage divider (5), light-emitting diode (6) and voltage stabilizing didoe (7).This circuit is connected directly between major loop inlet wire AC power R, S, T(660V/1140VAC) side and DC bus positive and negative electrode (1100V/1900VDC), by n resistance R series connection dividing potential drop and voltage stabilizing circuit WY voltage stabilizing, low-tension supply after voltage stabilizing is supplied to LED and carries out the independently charged display of AC three-phase, direct current two-phase, this circuit can continuous firing, both the process that power supply electric energy is decayed can also be indicated after having made power-off, the minimum direct current showing about 200V; Simultaneously for ensureing safety, if display circuit fault, resistance will be made to blow and become open circuit, automatic and major loop disconnects, and avoids failure propagation.
In figure 3, to be made up of with light-emitting diode (6) current-limiting resistor voltage divider (5) and passively to exchange charged display circuit, when after the energising of R, S, T three-phase, by current-limiting resistor voltage divider (5) dividing potential drop, light-emitting diode (6) is normally worked, display frequency converter input end of incoming cables electriferous state.For different electric pressures, as long as select suitable divider resistance, there is good versatility.
In the diagram, by current-limiting resistor voltage divider (5), light-emitting diode (6) and voltage stabilizing didoe (7) form the charged display circuit of passive direct current, in the frequency converter course of work, DC energy storage circuit preserves electric energy, by charged for passive direct current display circuit directly in parallel with DC side just, negative pole, it is made to bear accumulator voltage, the current-limiting resistor voltage divider (5) of different size is selected according to different electric pressures, voltage stabilizing didoe (7) can meet charged Presentation Function, when frequency converter normally works, both positive and negative polarity bears full-load voltage, voltage stabilizing didoe WY0-WY9 on average bears full-load voltage, LED 4-LED13 ON operation, , when DC energy storage voltage drop is low to moderate 1800V, voltage stabilizing didoe WY9 does not meet turn-on condition, then corresponding with it LED 4 can not work, and can see that direct voltage reduces like this from frequency converter box panel, after frequency converter quits work, along with the carrying out of discharge process, DC energy storage voltage is in reduction state always, so corresponding voltage stabilizing didoe (7) turns off step by step, and then corresponding light-emitting diode (6) also quits work with it, so, namely frequency converter box front panel can observe frequency converter direct current electriferous state.In addition, this circuit also has good versatility and transplantability, for different electric pressures, selects the number of voltage stabilizing didoe (7) model, number and the light-emitting diode (6) matched can realize charged Presentation Function.
Claims (6)
1. the charged display circuit of the passive alternating current-direct current of mine explosion-proof frequency converter (3), it is characterized in that: comprising: the charged display circuit of passive interchange, the charged display circuit of passive direct current, pcb board, the charged display circuit of passive interchange on described pcb board is connected by A, B, C electrode and major loop inlet wire three-phase alternating-current supply R, S, T-phase, and the charged display circuit of passive direct current on described pcb board is connected with DC bus positive and negative electrode by positive and negative electrode.
2. the charged display circuit of the passive alternating current-direct current of a kind of mine explosion-proof frequency converter according to claim 1, it is characterized in that: the charged display circuit of described passive interchange, by three groups of illuminating circuit Y-connections, often organizes illuminating circuit in series by current-limiting resistor voltage divider (5) and light-emitting diode (6).
3. the charged display circuit of the passive alternating current-direct current of a kind of mine explosion-proof frequency converter according to claim 1, it is characterized in that: the charged display circuit of described passive direct current is made up of current-limiting resistor voltage divider (5), light-emitting diode (6) and voltage stabilizing didoe (7), n current-limiting resistor voltage divider R one end is connected with DC bus positive electrode, and n the current-limiting resistor voltage divider R other end is connected with the positive pole of voltage stabilizing didoe (7) by light-emitting diode (6);
Wherein, the first voltage stabilizing didoe (7) is to the n-th voltage stabilizing didoe (7) for being connected in series, and the negative pole of the n-th voltage stabilizing didoe (7) is connected with DC bus negative pole.
4. adopt the method for the charged display circuit of the passive alternating current-direct current of a kind of mine explosion-proof frequency converter described in claim 1, it is characterized in that: its step is as follows:
1) circuit is connected directly between major loop inlet wire AC power R, S, T(660V/1140VAC) side and DC bus positive and negative electrode (1100V/1900VDC), by the dividing potential drop of n resistance R and the voltage stabilizing of voltage stabilizing circuit WY, low-tension supply is supplied to LED and carries out the charged display independently of AC three-phase, direct current two-phase;
2) in the frequency converter course of work, DC energy storage circuit preserves electric energy, by charged for passive direct current display circuit directly in parallel and DC side positive and negative electrode, makes it bear accumulator voltage;
When frequency converter normally works, both positive and negative polarity bears full-load voltage, and voltage stabilizing didoe WY0-WY9 on average bears full-load voltage, LED 4-LED13 ON operation;
When DC energy storage voltage drop is low to moderate 1800V, voltage stabilizing didoe WY9 does not meet turn-on condition, then corresponding with it LED 4 can not work, and can see that direct voltage reduces like this from frequency converter box panel;
After frequency converter quits work power-off, along with the carrying out of discharge process, DC energy storage voltage is in reduction state always, so corresponding voltage stabilizing didoe (7) turns off step by step, and then corresponding light-emitting diode (6) also quits work with it, for this reason, frequency converter box front panel also can indicate the process that power supply electric energy is decayed, observation frequency converter direct current electriferous state;
Simultaneously for ensureing safety, if display circuit fault, resistance will be made to blow and become open circuit, automatic and major loop disconnects, and avoids failure propagation.
5. the charged display packing of the passive alternating current-direct current of a kind of mine explosion-proof frequency converter according to claim 4, it is characterized in that: described circuit also has good versatility and transplantability, for different electric pressures, select the number of voltage stabilizing didoe (7) model, number and the light-emitting diode (6) matched can realize charged Presentation Function.
6. the charged display packing of the passive alternating current-direct current of a kind of mine explosion-proof frequency converter according to claim 4, is characterized in that: described circuit also have select the current-limiting resistor voltage divider (5) of different size according to different electric pressures, voltage stabilizing didoe (7) can meet charged Presentation Function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510538429.0A CN105162309B (en) | 2015-08-28 | 2015-08-28 | A kind of powered display circuit of the passive alternating current-direct current of mine explosion-proof frequency converter and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510538429.0A CN105162309B (en) | 2015-08-28 | 2015-08-28 | A kind of powered display circuit of the passive alternating current-direct current of mine explosion-proof frequency converter and method |
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| CN105162309A true CN105162309A (en) | 2015-12-16 |
| CN105162309B CN105162309B (en) | 2018-02-16 |
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