CN103618464A - Frequency converter of heading machine - Google Patents
Frequency converter of heading machine Download PDFInfo
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- CN103618464A CN103618464A CN201310622360.0A CN201310622360A CN103618464A CN 103618464 A CN103618464 A CN 103618464A CN 201310622360 A CN201310622360 A CN 201310622360A CN 103618464 A CN103618464 A CN 103618464A
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Abstract
The invention relates to the technology of heading machine main cutting motor variable frequency speed control, in particular to a frequency converter of a heading machine. The frequency converter solves the problem that smooth speed control cannot be achieved in the existing heading machine main cutting motor speed control technology. The frequency converter of the heading machine comprises a three-phase bridge type uncontrollable rectifying circuit, a filter circuit, a precharge circuit, a discharging circuit, an inverter circuit and a detection circuit. The three-phase bridge type uncontrollable rectifying circuit is composed of a first rectifying diode, a second rectifying diode, a third rectifying diode, a fourth rectifying diode, a fifth rectifying diode and a sixth rectifying diode. The filter circuit comprises a filter inductor and a supporting capacitor. The precharge circuit comprises a precharge resistor. The discharging circuit comprises a first discharging resistor and a second discharging resistor. The inverter circuit comprises a first IGBT, a second IGBT, a third IGBT, a fourth IGBT, a fifth IGBT, a sixth IGBT, a first drive board, a second drive board, a third drive board, a fourth drive board, a fifth drive board, a sixth drive board, a first absorption capacitor, a second absorption capacitor and a third absorption capacitor. The detection circuit comprises a Hall voltage sensor, a first Hall current sensor, a second Hall current sensor and a third Hall current sensor. The frequency converter is suitable for the heading machine, especially for the EBZ260 type heading machine.
Description
Technical field
The present invention relates to tunnel owner's cutting motor variable-frequency control technique, specifically a kind of development machine frequency converter.
Background technology
Development machine is the visual plant of coal mine operation.Development machine is when carrying out operation, and along with its walking mechanism is pushed ahead, its main cutting motor is fractured rock constantly, then detritus is transported.Under prior art condition, the main cutting motor of development machine all adopts the speed regulating method of pole-changing logarithm to carry out speed governing.Pole-changing logarithm speed regulating method specifically refers to: by changing the mode of connection of motor stator winding, change motor stator number of pole-pairs, reach thus speed governing object.Practice shows, because pole-changing logarithm speed regulating method belongs to step speed regulation, it is differential larger, causes the main cutting motor of development machine cannot obtain stepless speed control characteristic.Particularly, when adopting pole-changing logarithm speed regulating method to carry out speed governing to the main cutting motor of development machine, main cutting motor can only a kind of or or two kinds of speed under move, its governor control characteristics can not meet the needs of cutting various grades rock stratum, once encounter hard rock stratum, just cannot keep normal operation (motor rotation blockage when serious, have to stop cutting, exit cutterhead), not only have a strong impact on thus manufacturing schedule, and can cause heavy economic losses.Based on this, be necessary to invent a kind of brand-new speed regulating device that are applicable to tunnel owner's cutting motor, to solve existing driving owner cutting motor speed adjusting technique, cannot realize the problem of stepless speed control.
Summary of the invention
The present invention cannot realize the problem of stepless speed control in order to solve existing driving owner cutting motor speed adjusting technique, and a kind of development machine frequency converter is provided.
The present invention adopts following technical scheme to realize: development machine frequency converter, comprises the uncontrollable rectification circuit of three-phase bridge, filter circuit, pre-charge circuit, discharge circuit, inverter circuit, testing circuit;
The uncontrollable rectification circuit of described three-phase bridge is comprised of first-, six rectifier diodes;
Described filter circuit comprises filter inductance, Support Capacitor; The left end of filter inductance is connected with the positive output end of the uncontrollable rectification circuit of three-phase bridge; The positive pole of Support Capacitor is connected with the right-hand member of filter inductance; The negative pole of Support Capacitor is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described pre-charge circuit comprises pre-charge resistance; The left end of pre-charge resistance is connected with the right-hand member of filter inductance; The right-hand member of pre-charge resistance is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described discharge circuit comprises the first discharge resistance, the second discharge resistance; The left end of the left end of the first discharge resistance, the second discharge resistance is all connected with the right-hand member of filter inductance; The right-hand member of the right-hand member of the first discharge resistance, the second discharge resistance is all connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described inverter circuit comprises first-, six IGBT, first-, six drive plates, first-, tri-Absorption Capacitances; The one collector electrode of IGBT and the right-hand member of filter inductance are connected; Two signal output parts of the first drive plate are connected with emitter with the grid of an IGBT respectively; The collector electrode of the 2nd IGBT is connected with the emitter of an IGBT; Two signal output parts of the second drive plate are connected with emitter with the grid of the 2nd IGBT respectively; The emitter of the 2nd IGBT is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the first Absorption Capacitance is connected with the collector electrode of an IGBT; The negative pole of the first Absorption Capacitance is connected with the emitter of the 2nd IGBT; The 3rd collector electrode of IGBT and the right-hand member of filter inductance are connected; Two signal output parts of the 3rd drive plate are connected with emitter with the grid of the 3rd IGBT respectively; The collector electrode of the 4th IGBT is connected with the emitter of the 3rd IGBT; Two signal output parts of the 4th drive plate are connected with emitter with the grid of the 4th IGBT respectively; The emitter of the 4th IGBT is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the second Absorption Capacitance is connected with the collector electrode of the 3rd IGBT; The negative pole of the second Absorption Capacitance is connected with the emitter of the 4th IGBT; The 5th collector electrode of IGBT and the right-hand member of filter inductance are connected; Two signal output parts of the 5th drive plate are connected with emitter with the grid of the 5th IGBT respectively; The collector electrode of the 6th IGBT is connected with the emitter of the 5th IGBT; Two signal output parts of the 6th drive plate are connected with emitter with the grid of the 6th IGBT respectively; The emitter of the 6th IGBT is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the 3rd Absorption Capacitance is connected with the collector electrode of the 5th IGBT; The negative pole of the 3rd Absorption Capacitance is connected with the emitter of the 6th IGBT;
Described testing circuit comprises Hall voltage transducer, first-, tri-Hall current sensors; The positive input terminal of Hall voltage transducer is connected with the right-hand member of filter inductance; The negative input end of Hall voltage transducer is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The first Hall current sensor is serially connected with the exit of the emitter of an IGBT; The second Hall current sensor is serially connected with the exit of the emitter of the 3rd IGBT; The 3rd Hall current sensor is serially connected with the exit of the emitter of the 5th IGBT.
During work, the three-phase input end of the uncontrollable rectification circuit of three-phase bridge is connected with three phase line.The exit of the emitter of the exit of the emitter of the exit of the emitter of the one IGBT, the 3rd IGBT, the 5th IGBT is connected with the three phase supply input of driving owner cutting motor respectively.The signal input part of first-, six drive plates is all connected with development machine frequency changer controller.Specific works process is as follows: the three-phase alternating current from three phase line carries out rectification by the uncontrollable rectification circuit of three-phase bridge, the direct current that rectification produces carries out filtering by filter circuit, filtered direct current carries out inversion by inverter circuit, the three-phase alternating current that inversion produces offers the main cutting motor of development machine, and development machine carries out operation thus.In this process, development machine frequency changer controller is controlled in real time respectively first-, six IGBT by first-, six drive plates and is carried out conducting or shutoff, the waveform of the three-phase alternating current of inversion generation is changed in real time, make thus the rotating speed that tunnels owner's cutting motor change in real time, thereby realize the stepless speed control to driving owner cutting motor.The effect of pre-charge circuit is as follows: when the voltage of Support Capacitor is during lower than set point; the direct current that rectification produces charges gradually to Support Capacitor; pre-charge resistance can prevent from producing in Support Capacitor charging process excessive charging current, and then protection Support Capacitor and other circuit.The effect of discharge circuit is as follows: when needs overhaul driving owner cutting motor, the direct current electric charge of storing on Support Capacitor is released on the first discharge resistance and the second discharge resistance, prevents thus the direct current injury maintainer who stores on Support Capacitor.The effect of testing circuit is as follows: Hall voltage transducer detects the DC input voitage (being filtered DC voltage) of inverter circuit in real time, for vector control, calculates and overvoltage protection use.The first Hall current sensor, the second Hall current sensor, the 3rd Hall current sensor detect the three-phase alternating current output current (being the three-phase alternating current electric current that inversion produces) of inverter circuit in real time, for vector control, calculate and overcurrent protection use.The effect of first-, tri-Absorption Capacitances in inverter circuit is as follows: when first-, six IGBT carry out conducting or turn-off; first-, tri-Absorption Capacitances can absorb the peak overvoltage in inverter circuit; prevent that thus first-, six IGBT are breakdown, and then protection inverter circuit.Based on said process, to compare with existing driving owner cutting motor speed adjusting technique, development machine frequency converter tool of the present invention has the following advantages: development machine frequency converter of the present invention can be realized stepless speed regulation.Therefore, adopt development machine frequency converter of the present invention can make the main cutting motor of development machine obtain stepless speed control characteristic.In other words, main cutting motor can meet the needs of cutting various grades rock stratum, even if encounter hard rock stratum, still can keep normal operation, has not only effectively guaranteed thus manufacturing schedule, and has effectively avoided economic loss.In sum, development machine frequency converter of the present invention, by adopting brand new, efficiently solves the problem that existing driving owner cutting motor speed adjusting technique cannot be realized stepless speed control.
The present invention efficiently solves the problem that existing driving owner cutting motor speed adjusting technique cannot be realized stepless speed control, is applicable to development machine, is particularly useful for EBZ260 type development machine.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: R, S, T are the three-phase input end of the uncontrollable rectification circuit of three-phase bridge.
Embodiment
Development machine frequency converter, comprises the uncontrollable rectification circuit of three-phase bridge, filter circuit, pre-charge circuit, discharge circuit, inverter circuit, testing circuit;
The uncontrollable rectification circuit of described three-phase bridge is comprised of first-, six rectifier diode D1-D6;
Described filter circuit comprises filter inductance L, Support Capacitor C1; The left end of filter inductance L is connected with the positive output end of the uncontrollable rectification circuit of three-phase bridge; The positive pole of Support Capacitor C1 is connected with the right-hand member of filter inductance L; The negative pole of Support Capacitor C1 is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described pre-charge circuit comprises pre-charge resistance Rc; The left end of pre-charge resistance Rc is connected with the right-hand member of filter inductance L; The right-hand member of pre-charge resistance Rc is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described discharge circuit comprises the first discharge resistance Rf1, the second discharge resistance Rf2; The left end of the left end of the first discharge resistance Rf1, the second discharge resistance Rf2 is all connected with the right-hand member of filter inductance L; The right-hand member of the right-hand member of the first discharge resistance Rf1, the second discharge resistance Rf2 is all connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described inverter circuit comprises first-, six IGBTT1-T6, first-, six drive plate K1-K6, first-, tri-Absorption Capacitance C11-C13; The collector electrode of the one IGBTT1 is connected with the right-hand member of filter inductance L; Two signal output parts of the first drive plate K1 are connected with emitter with the grid of an IGBTT1 respectively; The collector electrode of the 2nd IGBTT2 is connected with the emitter of an IGBTT1; Two signal output parts of the second drive plate K2 are connected with emitter with the grid of the 2nd IGBTT2 respectively; The emitter of the 2nd IGBTT2 is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the first Absorption Capacitance C11 is connected with the collector electrode of an IGBTT1; The negative pole of the first Absorption Capacitance C11 is connected with the emitter of the 2nd IGBTT2; The collector electrode of the 3rd IGBTT3 is connected with the right-hand member of filter inductance L; Two signal output parts of the 3rd drive plate K3 are connected with emitter with the grid of the 3rd IGBTT3 respectively; The collector electrode of the 4th IGBTT4 is connected with the emitter of the 3rd IGBTT3; Two signal output parts of the 4th drive plate K4 are connected with emitter with the grid of the 4th IGBTT4 respectively; The emitter of the 4th IGBTT4 is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the second Absorption Capacitance C12 is connected with the collector electrode of the 3rd IGBTT3; The negative pole of the second Absorption Capacitance C12 is connected with the emitter of the 4th IGBTT4; The collector electrode of the 5th IGBTT5 is connected with the right-hand member of filter inductance L; Two signal output parts of the 5th drive plate K5 are connected with emitter with the grid of the 5th IGBTT5 respectively; The collector electrode of the 6th IGBTT6 is connected with the emitter of the 5th IGBTT5; Two signal output parts of the 6th drive plate K6 are connected with emitter with the grid of the 6th IGBTT6 respectively; The emitter of the 6th IGBTT6 is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the 3rd Absorption Capacitance C13 is connected with the collector electrode of the 5th IGBTT5; The negative pole of the 3rd Absorption Capacitance C13 is connected with the emitter of the 6th IGBTT6;
Described testing circuit comprises Hall voltage transducer SV1, first-, tri-Hall current sensor SC1-SC3; The positive input terminal of Hall voltage transducer SV1 is connected with the right-hand member of filter inductance L; The negative input end of Hall voltage transducer SV1 is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The first Hall current sensor SC1 is serially connected with the exit U of the emitter of an IGBTT1; The second Hall current sensor SC2 is serially connected with the exit V of the emitter of the 3rd IGBTT3; The 3rd Hall current sensor SC3 is serially connected with the exit W of the emitter of the 5th IGBTT5.
During concrete enforcement, the reverse breakdown voltage of described first-, six rectifier diode D1-D6 is 5000V, and on-state average current is 300A.The capacitance of described Support Capacitor C1 is 3.6mF.The resistance value of described pre-charge resistance Rc is 100 Ω, and power is 300W.The rated voltage of described first-, six IGBTT1-T6 is 3300V, and rated current is 800A.Described first-, six drive plate K1-K6 are 1IPSE1A33-60 type drive plate.The rated voltage of described first-, tri-Absorption Capacitance C11-C13 is 2000V, and capacitance is 1.0 μ F.
Claims (7)
1. a development machine frequency converter, is characterized in that: comprise the uncontrollable rectification circuit of three-phase bridge, filter circuit, pre-charge circuit, discharge circuit, inverter circuit, testing circuit;
The uncontrollable rectification circuit of described three-phase bridge is comprised of first-, six rectifier diodes (D1-D6);
Described filter circuit comprises filter inductance (L), Support Capacitor (C1); The left end of filter inductance (L) is connected with the positive output end of the uncontrollable rectification circuit of three-phase bridge; The positive pole of Support Capacitor (C1) is connected with the right-hand member of filter inductance (L); The negative pole of Support Capacitor (C1) is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described pre-charge circuit comprises pre-charge resistance (Rc); The left end of pre-charge resistance (Rc) is connected with the right-hand member of filter inductance (L); The right-hand member of pre-charge resistance (Rc) is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described discharge circuit comprises the first discharge resistance (Rf1), the second discharge resistance (Rf2); The left end of the left end of the first discharge resistance (Rf1), the second discharge resistance (Rf2) is all connected with the right-hand member of filter inductance (L); The right-hand member of the right-hand member of the first discharge resistance (Rf1), the second discharge resistance (Rf2) is all connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge;
Described inverter circuit comprises first-, six IGBT(T1-T6), first-, six drive plates (K1-K6), first-, tri-Absorption Capacitances (C11-C13); The one IGBT(T1) collector electrode is connected with the right-hand member of filter inductance (L); Two signal output parts of the first drive plate (K1) respectively with an IGBT(T1) grid be connected with emitter; The 2nd IGBT(T2) collector electrode and an IGBT(T1) emitter be connected; Two signal output parts of the second drive plate (K2) respectively with the 2nd IGBT(T2) grid be connected with emitter; The 2nd IGBT(T2) emitter is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the first Absorption Capacitance (C11) and an IGBT(T1) collector electrode be connected; The negative pole of the first Absorption Capacitance (C11) and the 2nd IGBT(T2) emitter be connected; The 3rd IGBT(T3) collector electrode is connected with the right-hand member of filter inductance (L); Two signal output parts of the 3rd drive plate (K3) respectively with the 3rd IGBT(T3) grid be connected with emitter; The 4th IGBT(T4) collector electrode and the 3rd IGBT(T3) emitter be connected; Two signal output parts of the 4th drive plate (K4) respectively with the 4th IGBT(T4) grid be connected with emitter; The 4th IGBT(T4) emitter is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the second Absorption Capacitance (C12) and the 3rd IGBT(T3) collector electrode be connected; The negative pole of the second Absorption Capacitance (C12) and the 4th IGBT(T4) emitter be connected; The 5th IGBT(T5) collector electrode is connected with the right-hand member of filter inductance (L); Two signal output parts of the 5th drive plate (K5) respectively with the 5th IGBT(T5) grid be connected with emitter; The 6th IGBT(T6) collector electrode and the 5th IGBT(T5) emitter be connected; Two signal output parts of the 6th drive plate (K6) respectively with the 6th IGBT(T6) grid be connected with emitter; The 6th IGBT(T6) emitter is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The positive pole of the 3rd Absorption Capacitance (C13) and the 5th IGBT(T5) collector electrode be connected; The negative pole of the 3rd Absorption Capacitance (C13) and the 6th IGBT(T6) emitter be connected;
Described testing circuit comprises Hall voltage transducer (SV1), first-, tri-Hall current sensors (SC1-SC3); The positive input terminal of Hall voltage transducer (SV1) is connected with the right-hand member of filter inductance (L); The negative input end of Hall voltage transducer (SV1) is connected with the negative output terminal of the uncontrollable rectification circuit of three-phase bridge; The first Hall current sensor (SC1) is serially connected with an IGBT(T1) the exit (U) of emitter; The second Hall current sensor (SC2) is serially connected with the 3rd IGBT(T3) the exit (V) of emitter; The 3rd Hall current sensor (SC3) is serially connected with the 5th IGBT(T5) the exit (W) of emitter.
2. development machine frequency converter according to claim 1, is characterized in that: the reverse breakdown voltage of described first-, six rectifier diodes (D1-D6) is 5000V, and on-state average current is 300A.
3. development machine frequency converter according to claim 1, is characterized in that: the capacitance of described Support Capacitor (C1) is 3.6mF.
4. development machine frequency converter according to claim 1, is characterized in that: the resistance value of described pre-charge resistance (Rc) is 100 Ω, and power is 300W.
5. development machine frequency converter according to claim 1, is characterized in that: rated voltage described first-, six IGBT(T1-T6) is 3300V, and rated current is 800A.
6. development machine frequency converter according to claim 1, is characterized in that: described first-, six drive plates (K1-K6) are 1IPSE1A33-60 type drive plate.
7. development machine frequency converter according to claim 1, is characterized in that: the rated voltage of described first-, tri-Absorption Capacitances (C11-C13) is 2000V, and capacitance is 1.0 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310622360.0A CN103618464A (en) | 2013-11-30 | 2013-11-30 | Frequency converter of heading machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310622360.0A CN103618464A (en) | 2013-11-30 | 2013-11-30 | Frequency converter of heading machine |
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| CN103618464A true CN103618464A (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310622360.0A Pending CN103618464A (en) | 2013-11-30 | 2013-11-30 | Frequency converter of heading machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105227039A (en) * | 2015-09-22 | 2016-01-06 | 株洲时代装备技术有限责任公司 | For cut frequency-converting control device and the control method thereof of cantilever type coal mine development machine |
| CN107370343A (en) * | 2017-07-03 | 2017-11-21 | 中车大连电力牵引研发中心有限公司 | Auxiliary power module and circuit |
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| CN105227039A (en) * | 2015-09-22 | 2016-01-06 | 株洲时代装备技术有限责任公司 | For cut frequency-converting control device and the control method thereof of cantilever type coal mine development machine |
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