CN204013323U - A kind of improvement type gang saw mill frequency converter - Google Patents
A kind of improvement type gang saw mill frequency converter Download PDFInfo
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- CN204013323U CN204013323U CN201420464724.7U CN201420464724U CN204013323U CN 204013323 U CN204013323 U CN 204013323U CN 201420464724 U CN201420464724 U CN 201420464724U CN 204013323 U CN204013323 U CN 204013323U
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- gang saw
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Abstract
The utility model relates to a kind of improvement type gang saw mill frequency converter, it comprises three-phase bridge rectifier circuit, filter circuit, charge circuit circuit, DC bus-bar voltage sample circuit U1, motor side voltage sample circuit U2, frequency converter inter-process circuit U 3, frequency converter operate power control circuit U4, voltage follower circuit.The setting of the utility model circuit is more reasonable, little to the impact of motor and electrical network, more energy-conservation.
Description
Technical field
The utility model relates to a kind of frequency converter, is specifically related to a kind of gang saw mill frequency converter.
Background technology
Gang saw is that one group of gang saw such as (tens to up to a hundred not) is contained on reciprocating saw frame, drive saw frame to move reciprocatingly by the toggle on the large flywheel of motor driving, do continuously feed motion downwards by elevating drive mechanism exerts pressure to saw blade simultaneously, make diamond saw blade do relative cutting movement to stone material, reach the object of cutting stone material.The main electric motor starting of gang saw mainly uses following several at present: star three starts, and is excessively started by soft initiator, is started by Frequency Converter Control.
Star delta reduced-voltage starting is one reduced-voltage starting mode simply and easily, the squirrel-cage asynchronous motor that is delta connection for the stator winding of normal operation, if stator winding is connected into star in the time starting, after waiting to start, be connected into again triangle, just can reduce starting current, alleviate its impact to electrical network.While adopting star triangle start, when starting current only has originally by delta connection across-the-line starting 1/3, if starting current when across-the-line starting is calculated with 6～7 times of rated current, in the time that star triangle starts, just 2～2.3 times of starting currents, 1/ √ 3 when starting resistor only has original delta connection directly to start simultaneously, starting torque also only has 1/3 of former delta connection across-the-line starting, so while adopting the starting of star triangle, current characteristics is fine, and torque characteristics is poor, so be objectively only applicable to the occasion of no-load or light start.
Soft initiator (soft initiator) is a kind of novel motor control assembly that integrates electric machine soft starting, soft stop, light-load energy saving and multi-protective function, is called SoftStarter abroad.Soft initiator adopts three-phase anti-parallel thyristor as voltage regulator, is accessed between power supply and motor stator.Sort circuit is as three-phase thyristor bridge rectification circuit.While using soft initiator actuating motor, the output voltage of thyristor increases gradually, and motor accelerates gradually, until the full conducting of thyristor, motor is operated in the mechanical property of rated voltage, realizes smoothly and starting, and reduces starting current, avoids starting overcurrent tripping.In the time that motor reaches rated revolution, start-up course finishes, soft initiator replaces the thyristor of having finished the work from employing bypass contactor, for running well, motor provides rated voltage, to reduce the thermal losses of thyristor, extend the useful life of soft initiator, improve its operating efficiency, make again electrical network avoid harmonic pollution.Soft initiator also provides soft stop function simultaneously, and soft stop is contrary with soft start-up process, and voltage reduces gradually, and revolution drops to zero gradually, the torque shock ends of avoiding free parking to cause.But no matter which kind of Starting mode soft initiator uses, its result is also finally to transfer to bypass contactor to realize the follow-up operation of main motor, for energy-saving and cost-reducing still few of improvement.
It is also more and more that gang saw uses the producer of Frequency Converter Control at present, but be all to use frequency converter to add brake resistance or add brake unit to power up resistance form substantially, it is exactly the protective device that DC bus-bar voltage in order to protect frequency converter is no more than the rated voltage of the device in frequency converter that what is called adds brake unit, reality is started in process at gang saw, this brake unit can move very frequently, a lot of energy are released in brake resistance from DC bus, become heat energy, and this brake resistance power of releasing is all tens KW, waste, if do not released, can threaten the safety of frequency converter, because large flywheel meeting drive motor is often in generating state, the electricity sending and frequency converter busbar voltage superpose, can cause that busbar voltage sharply raises.
Star three starts energy loss maximum as can be seen here, and soft initiator impacts less in start-up course to electrical network, but long-term work is started with star three, frequency converter adds brake unit, and power consumption, all larger to electrical network and shock effect thereof more.
Summary of the invention
Goal of the invention: the purpose of this utility model is in order to overcome deficiency of the prior art, provides a kind of circuit setting more reasonable, little to the impact of motor and electrical network, more energy-conservation improvement type gang saw mill frequency converter.
Technical scheme: in order to solve the problems of the technologies described above, a kind of improvement type gang saw mill frequency converter described in the utility model, it comprises three-phase bridge rectifier circuit, filter circuit, charge circuit circuit, DC bus-bar voltage sample circuit U1, motor side voltage sample circuit U2, frequency converter inter-process circuit U 3, frequency converter operate power control circuit U4, voltage follower circuit, described voltage follower circuit has the output U end being connected with motor, V end and W end, on frequency converter, there is positive terminal and the negative pole end of DC bus, described three-phase bridge rectifier circuit, filter circuit, charge circuit circuit is connected successively with voltage follower circuit, in described voltage follower circuit one side, frequency converter operate power control circuit U4 is from the close-by examples to those far off set respectively, frequency converter inter-process circuit U 3 and DC bus-bar voltage sample circuit U1, described DC bus-bar voltage sample circuit U1 is connected with negative pole end with the positive terminal of DC bus, the output U end that described motor side voltage sample circuit U2 is connected with motor, V end is connected, and motor side voltage sample circuit U2 is connected with frequency converter inter-process circuit U 3.
Described filter circuit comprises two groups of filter units; Every group of filter unit comprises capacitor C and resistance R, and they are arranged in parallel.
Described charge circuit circuit comprises charging resistor and contact-making switch, and they are arranged in parallel.
Described voltage follower circuit comprises triode Q1, Q2, Q3, Q4, Q5 and Q6, wherein Q1 and Q2 series connection are arranged between the positive terminal and negative pole end of DC bus, Q3 and Q4 series connection are arranged between the positive terminal and negative pole end of DC bus, and Q5 and Q6 series connection are arranged between the positive terminal and negative pole end of DC bus.
Described triode Q1, Q2, Q3, Q4, Q5 and Q6 are connected with frequency converter operate power control circuit U4.
Operation logic of the present utility model is: by D1, D2, D3, D4, D5, D6 will be from R, S, the three-phase alternating current that T comes in carries out rectification, again by C1, C2, R1, R2 carries out filtering, at the beginning of powering on, by R3, the voltage on DC bus is slowly released in loop of power circuit, so that frequency converter operate power control circuit U4 and frequency converter inter-process circuit U 3 check that whether power component is normal, normally control K2 inhale and, whole frequency converter in the course of the work, all the time detect the voltage on voltage and the DC bus of motor side by U1 and U2, and result is submitted to U3, if U3 detects that motor side voltage is higher than busbar voltage, control U4 and cut off Q1, Q2, Q3, Q4, Q5, the output of Q6 etc., treat that U3 detects that motor side voltage is lower than DC bus-bar voltage, normally work again.
Beneficial effect: the utility model compared with prior art, its remarkable advantage is: the utility model circuit arranges rationally, safe and reliable to operation, adopt frequency converter operate power control circuit U4 and frequency converter inter-process circuit U 3, ensure that frequency converter accurately moves, adopt DC bus-bar voltage sample circuit U1 and motor side voltage sample circuit U2, by its signal feedback to processor, whether judge whether to carry out frequency converter by processor exports, that is to say, when flywheel turn fast time, motor is in generating state, the electricity sending is higher than busbar voltage, output stops, when voltage is exported lower than busbar voltage, play more energy-conservation effect, each circuit coordinates operation, impact to motor and electrical network is little, realistic instructions for use.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below by drawings and Examples, the utility model is further described.
As shown in Figure 1, a kind of improvement type gang saw mill frequency converter described in the utility model, it comprises three-phase bridge rectifier circuit 1, filter circuit 2, charge circuit circuit 3, DC bus-bar voltage sample circuit U1, motor side voltage sample circuit U2, frequency converter inter-process circuit U 3, frequency converter operate power control circuit U4, voltage follower circuit 4, described voltage follower circuit 4 has the output U end being connected with motor, V end and W end, on frequency converter, there is positive terminal and the negative pole end of DC bus, described three-phase bridge rectifier circuit 1, filter circuit 2, charge circuit circuit 3 is connected successively with voltage follower circuit 4, in described voltage follower circuit 4 one sides, frequency converter operate power control circuit U4 is from the close-by examples to those far off set respectively, frequency converter inter-process circuit U 3 and DC bus-bar voltage sample circuit U1, described DC bus-bar voltage sample circuit U1 is connected with negative pole end with the positive terminal of DC bus, the output U end that described motor side voltage sample circuit U2 is connected with motor, V end is connected, and motor side voltage sample circuit U2 is connected with frequency converter inter-process circuit U 3, described filter circuit 2 comprises two groups of filter units, every group of filter unit comprises capacitor C and resistance R, and they are arranged in parallel, described charge circuit circuit 3 comprises charging resistor and contact-making switch, and they are arranged in parallel, described voltage follower circuit 4 comprises triode Q1, Q2, Q3, Q4, Q5 and Q6, wherein Q1 and Q2 series connection are arranged between the positive terminal and negative pole end of DC bus, Q3 and Q4 series connection are arranged between the positive terminal and negative pole end of DC bus, and Q5 and Q6 series connection are arranged between the positive terminal and negative pole end of DC bus, described triode Q1, Q2, Q3, Q4, Q5 and Q6 are connected with frequency converter operate power control circuit U4.The utility model circuit arranges rationally, safe and reliable to operation, adopt frequency converter operate power control circuit U4 and frequency converter inter-process circuit U 3, ensure that frequency converter accurately moves, adopt DC bus-bar voltage sample circuit U1 and motor side voltage sample circuit U2, by its signal feedback to processor, whether judge whether to carry out frequency converter by processor exports, that is to say, when flywheel turn fast time, motor is in generating state, the electricity sending is higher than busbar voltage, output stops, when voltage is exported lower than busbar voltage, play more energy-conservation effect, each circuit coordinates operation, impact to motor and electrical network is little, realistic instructions for use.
The utility model provides a kind of thinking and method; method and the approach of this technical scheme of specific implementation are a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art, not departing under the prerequisite of the utility model principle, can also make some improvements and modifications; these improvements and modifications also should be considered as protection range of the present utility model, in the present embodiment not clear and definite each part all available prior art realized.
Claims (5)
1. an improvement type gang saw mill frequency converter, it is characterized in that: it comprises three-phase bridge rectifier circuit (1), filter circuit (2), charge circuit circuit (3), DC bus-bar voltage sample circuit U1, motor side voltage sample circuit U2, frequency converter inter-process circuit U 3, frequency converter operate power control circuit U4, voltage follower circuit (4), described voltage follower circuit (4) has the output U end being connected with motor, V end and W end, on frequency converter, there is positive terminal and the negative pole end of DC bus, described three-phase bridge rectifier circuit (1), filter circuit (2), charge circuit circuit (3) is connected successively with voltage follower circuit (4), in described voltage follower circuit (4) one sides, frequency converter operate power control circuit U4 is from the close-by examples to those far off set respectively, frequency converter inter-process circuit U 3 and DC bus-bar voltage sample circuit U1, described DC bus-bar voltage sample circuit U1 is connected with negative pole end with the positive terminal of DC bus, the output U end that described motor side voltage sample circuit U2 is connected with motor, V end is connected, and motor side voltage sample circuit U2 is connected with frequency converter inter-process circuit U 3.
2. improvement type gang saw mill frequency converter according to claim 1, is characterized in that: described filter circuit (2) comprises two groups of filter units; Every group of filter unit comprises capacitor C and resistance R, and they are arranged in parallel.
3. improvement type gang saw mill frequency converter according to claim 1, is characterized in that: described charge circuit circuit (3) comprises charging resistor and contact-making switch, and they are arranged in parallel.
4. improvement type gang saw mill frequency converter according to claim 1, it is characterized in that: described voltage follower circuit (4) comprises triode Q1, Q2, Q3, Q4, Q5 and Q6, wherein Q1 and Q2 series connection are arranged between the positive terminal and negative pole end of DC bus, Q3 and Q4 series connection are arranged between the positive terminal and negative pole end of DC bus, and Q5 and Q6 series connection are arranged between the positive terminal and negative pole end of DC bus.
5. improvement type gang saw mill frequency converter according to claim 4, is characterized in that: described triode Q1, Q2, Q3, Q4, Q5 and Q6 are connected with frequency converter operate power control circuit U4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464724.7U CN204013323U (en) | 2014-08-15 | 2014-08-15 | A kind of improvement type gang saw mill frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464724.7U CN204013323U (en) | 2014-08-15 | 2014-08-15 | A kind of improvement type gang saw mill frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN204013323U true CN204013323U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420464724.7U Expired - Fee Related CN204013323U (en) | 2014-08-15 | 2014-08-15 | A kind of improvement type gang saw mill frequency converter |
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| CN (1) | CN204013323U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337556A (en) * | 2014-08-15 | 2016-02-17 | 先驰（无锡）数控装备有限公司 | Improved-type frequency converter for gang saw machine |
-
2014
- 2014-08-15 CN CN201420464724.7U patent/CN204013323U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337556A (en) * | 2014-08-15 | 2016-02-17 | 先驰（无锡）数控装备有限公司 | Improved-type frequency converter for gang saw machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20180815 |