• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. AC INverter to AC, containing connected to the terminals of the AC source through a three-phase transformer, a termination device forming the DC terminals of the source to which the inverter of the current is connected with its own commutation, consisting of at least of one main tyris.tornoho bridge and commuting circuits, which is: with, the cathode of the first limiting diode 93 and the anode of the first kbmut are connected to the positive terminal 1.1 of the direct current of source 1 thyristor 21, and the fourth limiting diode 96 anode and the cathode of the second commutation thyristor 22 to the negative terminal 1.2, and a booster capacitor 10 connected by an anode of the first and fourth limiting diodes 93.96, shunted by a discharge resistor 11 and a booster with a voltage of 9 , the anode of the first limiting diode 93 is connected through the fifth separating diode 91 to the anodes of the anode group of the bridge diode 5, through the second limiting diode 94 to the anode of the second commuting diode thyristor 22 and through the first booster thyristor 41 and booster choke 15 ° with the anode of the third 31 and the cathode of the fourth 32 switching thyristors connected via a serial LC circuit with the cathode of the first 21 and the anode of the second 22 switching thyristors of the fourth limiting diode 96 connected through the sixth dividing diode 92 to the cathodes of the cathode Group of the bridge diode 6, through the third limiting diode 95 to the first commutating thyristor 22, and through the second additional voltage t Ristor 42 - with the anode of the second commutating thyristor 22, connected through a serial line from the second smoothing throttle of the 14th and second emission diode 52 to the anode of the fourth commutating thyristor 32 and cathode; 0 of the second separating diode 62, and through a serial chain from the first smoothing throttle 13, and the first emission diode 51 -.c with the cathode of the third switching thyristor 31 and the anode of the first distribution diode 61, the cathode of which is connected to the cathode of the fifth separating diode 9Gi via a but connected to a storage capacitor 8 and the third and fourth dividing diodes 77,78 to the anode of the sixth diode spacer 92, the capacitor 6 is connected in parallel a block retraction accumulated energies 7 and AC outlets
    公开号:SU1119141A1
    申请号:SU797770971
    申请日:1979-12-11
    公开日:1984-10-15
    发明作者:Иржи Винклер；Иосиф Цибулка；Ян Брыкси；Рихард Елинек；Владимир Мичкал；Ян Кртек；Брослав Глоушек；Милан Кондр
    申请人:Чкд Прага (Инопредприятие)；
    IPC主号:
    专利说明:

    Bridge storage diodes 3 ° and 6 are connected to the output pins 4.1, 4.2, 4.3 of the inverter.
    2, the Converter according to claim 1, which makes it clear that the accumulated energy removal unit 7 is made in the form of a resistor.
    1119141
    3. The converter according to claim 1, similar to the fact that the 7 ° power storage unit is made in the form of an additional controllable rectifier, the alternating current outputs of which are connected to the additional secondary winding of the three-phase power supply transformer.
    The invention relates to an AC-to-AC converter, comprising connected via a three-phase transformer to the terminals of an AC power source, a driver forming the DC terminals of the source to which a current inverter with its own switching consisting of at least one primary switch is connected via an input choke. thyristor bridge and commutation circuits and is intended primarily for high power converters with a parallel connection of the main thyristors.
    There are known circuits of current inverters with their own commutation, where the switching process takes place in two steps, since the inverters have two-step commutation (USSR Treasury Certificate No. 226008, class N 02 M 7/515, 1965).
    Commutation capacitors of these inverters must, in addition to their own switching off the thyristor, provide for the accumulation of energy from the load inductance, and for asynchronous motors, the energy of the magnetic field of the dissipation. This leads to significant capacitances of these capacitors and to difficulties in limiting resistances, for example, to a limited frequency range.
    Three-step commutation inverters are known, where the rf & functions of the switching circuits are assigned to their own switching off of the thyristor and to the accumulation of energy (USSR author's certificate No. 277982, class. H 02 M 7/513, 1968).
    However, the use of three-step switching does not provide
    all the properties necessary for a gok inverter, for example, the ability to impose an overload, reliable switching. A three-stage switching inverter is not convenient for high power, mainly for parallel connection of main thyristors and separation reactors. This is because as the switching currents increase, the inductances in the commuting emission circuits decrease and it is not possible to compare them with the inductances of the separation reactors or with the own inductances of the supply wires. As a result, the known inverters are inconvenient in operation.
    The essence of the invention is that in an AC-to-AC converter, there is an expander connected via a three-phase transformer to the terminals of the alternating current source, which form the DC terminals of the source to which the external switching inverter is connected to at least one main thyristor bridge and switching circuits, the positive terminal of the DC source is connected to the cathode of the first limiting diode and the anode of the first comm Iruk tseg of the thyristor and to the negative terminal of the anode of the fourth limiting diode and a cathode of the second switching thyristor and the anode of the first and fourth limit lnyh diodes connected voltodobavochsh second capacitor shunted discharge dnym resistor and voltodo3 bavochnym voltage source, the anode of the first clamping diode is coupled via the fifth separating diode with anodes of the anode group of the bridge diode, through the second limiting diode - with the anode of the second commuting thyristor and through the first Voltage-supplementary thyristor and booster choke with the anode of the third and the cathode of the fourth switching thyristor connected through a serial LC circuit to the cathode of the first and anode of the second switching thyristor, the cathode of the fourth limiting diode is connected through the sixth separating diode to the cathode of the cathode group of the accumulating diode through the limiting diode from the cathodes of the first commutation thyristor, and through the second booster thyristor - with the anode the commutating thyristor, connecting via a series of second smoothing thrusters and a second emission diode with an anode of the fourth commutation thyristor and a cathode of the second separation diode, and through a serial of a network of the first smoothing polaris and the first diode of the third switching thyristor and anode of the first separating diode, the cathode of which is connected with the cathode of the fifth separating diode and through the series-connected storage capacitor and the third and fourth separation diodes with the anode sixth About the separation diode, and parallel to the capacitor, the accumulated energy removal unit is connected, and the AC terminals of the storage diode bridge are connected to the output terminals of the inverter. The power storage unit can be made in the form of a resistor. In addition, the accumulated energy removal unit can be made in the form of an additional controlled rectifier of the unit, the alternating current leads of which are connected to the additional secondary winding of the three-phase transformer of the power source. Figure 1 shows the general schemes of the proposed converter with the exception of a part of the power supply; on Fig. 2011 4. an example of the implementation of a part of the converter power supply, in Fig. 26, a block for the removal of stored energy. The current inverter is powered by a current source of 1 ° formed by two controlled thyristor three-phase bridges connected in parallel through distribution reactors to a variable side and a smoothing inductance to the constant side of these amplifiers. The variable side of the power supply of these bridges (variable terminals 1.3, 1.4, 1.5 of the current source 1 °) is connected to the outputs of the first secondary winding of the three-winding transformer, power supply 16 (Fig. 2a), the second secondary winding of which is connected to the controlled rectifier of the unit removal of stored energy. Two main thyristor bridges 2, 3 °, containing thyristors 1-6 and 1-6 and separation reactors 2.3, are connected in parallel to the first and second constant terminals 1.1, 1.2 of the current source 1. 2.4, 2.5 and 3.3, 3.4, 3.5. The first limiting diode 93 is connected to the first output terminal 1.1 of the current source 1 with its cathode and the first switching thyristor 21 with its own anode. The fourth limiting diode 96 is connected to the second output terminal 1.2 of the current source with its anode and using its second cathode switching thyristor 22. Between the anode of the first limiting diode 93 and the cathode of the fourth limiting diode 96 is included a booster capacitor 10. to which a constant volt booster is connected in parallel -screw voltage source 9 which can be formed, for example, using a serial combination of circuit breaker, a transformer and a diode bridge vmp tel. A discharge resistor of 11 ° is also connected in parallel with the boost voltage capacitor 10. Next, the anode of the first limiting diode 93 is connected on one side through the five separating diode 91 to the fixed-side terminal 5.4 of the anode unit of the storage diodes containing the diodes 71.73 75 and on the other side via the second negative diode 94 to the anode of the second switching thyristor 22 and also through the first booster thyristor. 41 and a boost reactor 15 (with terminals 15.1, 15.2) to the anode of the third switching thyristor 32, connected via a serial 12 ° LC circuit (with terminals 12.1, 12.2) to the cathode of the first switching thyristor 22. The cathode of the fourth negative diode 96 is connected to one hundred through the sixth isolation diode, 93 to terminal 6.4 of the fixed side of the cathode block of 6 ° storage diodes (containing diodes 72, 74, 76), on the other hand, through the third limiting diode 95, to the cathode of the first switching thyristor 21 and also through the second volt The left thyristor 42 to the anode of the second commutation thyristor 21. This anode is connected from one side through a serial combination of the second smoothed throttle 14 (with terminals 14.1, 14.2) and the second diode of the emission 52 to the anode of the fourth switching thyristor 32 and to the cathode second dividing diode 62 and on the other hand through the successive combination of the first smoothing throttle 13 ° (with terminals 13.1, 13.2) and the first emission diode 51 to the cathode of the third switching thyristor 31 and the anode of the first dividing diode 61. The cathode of the first p The separating diode 61 is connected on the one hand to the cathode of the fifth split diode 91 and on the other hand through a series combination of a storage capacitor 8 and a third or fourth separating diode. 77 and 78 to the anode of the sixth separation diode 92, connected to the anode of the second separation diode 62, parallel to the storage capacitor 8 is connected to the accumulated energy removal unit 7, forming, for example, using a resistor (shown on terminals 7.1,7.2) Variable-side terminals 5.1, 5.2, 5.3 and 6.1, 6.2, 6.3 of the anode and cathode block of storage diodes 5, are connected to the output terminals 4.1, 4.2, 4.3 of the current inverter (connected further to the inverter load 4 formed, for example, by an induction motor) and need to. divide 2.3, 2.4, 2.6 and 3.3, 3.4, 3.5 main thyristor bridges 2,3. The Converter operates as follows. The current from the source 1 to the load 4 goes from the first terminal 1.1 of the current source 1 to the terminals 2.1 and 3.1 of the main thyristor bridges 2 °, and through the pair of thyristors 2.2 separation reactors 2.5 and 3.5 to the output terminal 4.3 of the inverter. From load 4 to the source current through the terminal 4.2 of the inverter, separation reactors 2.4, 3.4, thyristors 3.3 and dc terminals 2.2, 3.2 to terminal 1.2 of the current source 1. At the time of switching it is necessary to interrupt the current in the thyristor .2,2 and turn on the thyristors 4.4. The polarity of the switching capacitor in the series LC chain before switching is positive on the side of terminal 12.1. When switching on switching thyristors 31 and 21, the load current from thyristors 2.2 switches to switching thyristor 21, terminal 12.2, terminal 12.1, switching thyristor 31 and isolation diode 61, terminal 5.4 diode 75 and inverter terminal 4.3. The steepness of the switching currents is determined by the separation reactors in blocks 2 and 3 and the switching reactors in the LC-chain 12. Simultaneously with this process, the capacitor is discharged in block 12 through a thyristor 31j and a diode 51 and a smoothing choke 13. After the thyristors 2.2 are turned off, the load current then passes through the described circuit through the commutation capacitor to the load and recharges this capacitor to the opposite polarity, i.e. terminal 12.2 is positive polarity. After the thyristor 2.2 is turned off, when the voltage at terminal 12.1 is almost the same as at the beginning of the switching, the current flows through the circuit: terminal 4.1, diode 74, diode 92, capacitor of the unit 10 °, diode 93, thyristor 21, LC circuit 12 , tiris.tor 31, diode 61, diode 75, terminal 4.3. The current along this path is caused by the fact that at the time of turning off thyristors 2.2, the voltage at terminals 71–4.1, 4.3 is so polar that there is a positive value at terminal 4.1. Consequently, the voltage sources of the chain 12 (switching capacitor) and the voltage at terminals 4.1 and 4.3 are connected in series. These successively included sources, through diode 74, 92 and 93, cause such a current in the booster capacitor 10 that a voltage drop occurs on the internal load impedance at terminals 4.1 and 4.3. This pulsating current quickly decreases because the voltage across the capacitor in the bc-chain 12 drops to zero and, finally, changes polarity. This process is very important because it determines the negative voltage on the switched off thyristors 2.2. The voltage on them cannot be, as a result of the process described, greater than the voltage on the booster capacitor 10. Using a discharge resistor of 11 ° on capacitor 10, an equilibrium is established between the charge and discharge energies of the capacitor. The switching process continues with using recharging of the switching capacitor of the LC-chain 12. At the moment of the voltage passing through the cp nil, the polarity of the voltage of the thyristor being turned off 2.2 changes. Thus, the turn-off time of these thyristors is determined. The voltage in the switching capacitor changes its polarity to positive at terminal 12.2. When this voltage reaches such a magnitude that increases the magnitude of the linear voltage between terminals 4.1 and 4. 3 the thyristor -4.4 is turned on, and the current passes from the commutation capacitor circuit to the newly switched on main thyristors 4.4. It is possible to regulate the moment of this SWITCHING by means of the delayed switching on of thyristors 4.4. This is important when it is necessary to vary the voltage on the switching capacitor depending on the current. The moment of switching on the main thyristors (in this case, thyristors 4.4) can be regulated, for example, a voltage sensor on the switching capacitor of the LC circuit 12 If the main thyristors 4.4 are switched on, current is switched between the phases 4.1 and 4.3. The in-phase current at terminal 4.3 drops because a storage capacitor 8 is sequentially turned on through this diode 74.78, 77.76 so that it reduces the polarity of the current in the old phase at terminal 4.3, and a current appears in phase at terminal 4.1; Dozarzha zhatsya only one polarity (at terminal 12.2 - positive polarity). With the help of thyristors 42 and 41 (their switching on) Dozar is supplied from the source - booster capacitor 10, the commutation capacitor through the booster reactor 15. After charging the capacitor, the thyristors 41,42 turn off on their own. This unidirectional metering mainly ensures the start-up of the inverter. Further metering is possible to carry out the aforementioned delay of the main thyristors in blocks of 2 ° and 3 °. The described commutation takes place in three stages. The steps for switching between the load terminals or the output terminals of the inverter 4.3 and 4.1 are as follows: t step: switching from the main thyristor to the auxiliary switching circuit, i.e. from chain 2: 1 and 3.1, 2.2, 2.5 and 3.5 and 4.3 on the chain: 2.1 and 3.1, 21, 12.31, 61.75.43. P stage: switching from circuit 2.1 and 3.1,21,12,31,61,75,4.3 along the circuit of the newly switched on main thyristors 2.1 and 3.1, 4 and 4, 2.3 and 3.3 e 74.78.8 °, 77.76, 4.3. W stage: switching between the phases from the circuit 2.1 and 3.1,4..3 3.3, 74,78, 8, 77,75, 4.3 on the circuit of the new phase 2.1 3.1 and 4.4 2.3 3.3 and 4.1. In addition to these switching stages, the following processes take place in parallel: voltage limiting on the thyristor using diodes 92.93 and booster capacitor 10, polarizing the terminal 12.2, switching circuit capacitor LC12, discharging the switching capacitor to diode 31 and smoothing choke 13 ° The switching overvoltages are limited on thyristors 2.2 using diodes 72.92, 93 and a charge-capacitor capacitor 10.
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    权利要求:
    Claims (3)
    [1]
    1. AC to AC converter, comprising a rectifier connected through a three-phase transformer to the terminals of the AC source, forming the DC terminals of the source, to which, through the input inductor, a self-switching current inverter consisting of at least one main thyristor bridge and switching circuits, characterized in that the cathode of the first limiting diode 93 and the anode of the first switching thyristor are connected to the positive DC terminal 1.1 of the source 1 a 21, and to the negative terminal
    1.2 - the anode of the fourth limiting diode. 96 and the cathode of the second switching thyristor 22, and between the anode of the first and fourth limiting diodes 93.96 is connected a boost capacitor 10, mounted by a discharge resistor 11 and a voltage boost source 9 °, the anode of the first restriction diode 93 is connected through the fifth dividing diode 91 with anodes of the anode group of the bridge of storage diodes 5, through the second limiting diode 94 - with the anode of the second switching thyristor 22 and through the first boost thyristor a torus 41 and a 15 ° boost choke with an anode of the third 31 and a cathode of the fourth 32 switching thyristors connected via a serial LC circuit to the cathode of the first 21 and the anode of the second 22 switching thyristors, the cathode of the fourth limiting diode 96 is connected through the sixth isolation diode 92 to the cathode cathodes The bridge diode bridge groups are 6 °, through the third limiting diode 95, with the cathode of the first switching thyristor 22, and through the second boost thyristor 42, with the anode of the second switching thyristor 22, connected through a serial chain from the second smoothing inductor of the 14th and second emission diodes 52 with the anode of the fourth switching thyristor 32 and the cathode of the second isolation diode 62, · and through the serial chain from the first smoothing inductor 13 and the first emission diode 51 -, with the cathode of the third switching thyristor 31 and the anode of the first distribution diode 61, the cathode of which is connected to the cathode of the fifth separation diode 91 and through series-connected storage capacitor 8 ° and the third and fourth sections Yelnia diodes 77,78 to the anode of the sixth diode spacer 92, the capacitor 6 is connected in parallel a block retraction accumulated energies 7 °, and the AC power outlets
    SU „„ 1119141 of the bridge of storage diodes 3 ° and 6 ° are connected to the output terminals 4.1,
    4.2, 4.3 inverters.
    [2]
    2. The Converter according to claim 1, characterized in that> that the accumulated energy removal unit 7 ° is made in the form of a resistor.
    [3]
    3. The converter according to π.ί, characterized in that the accumulated energy removal unit 7 ° is made in the form of an additional controlled rectifier, the AC terminals of which are connected to an additional secondary winding of a three-phase power supply transformer.
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    同族专利:
    公开号 | 公开日
    FI793901A|1980-07-03|
    FI73546C|1987-10-09|
    FR2446029B1|1984-01-27|
    GB2039169B|1983-05-11|
    DD159961A3|1983-04-20|
    CS215272B1|1982-08-27|
    FI73546B|1987-06-30|
    DE2950800A1|1980-07-17|
    GB2039169A|1980-07-30|
    US4317166A|1982-02-23|
    FR2446029A1|1980-08-01|
    DE2950800C2|1987-04-30|
    JPS55114186A|1980-09-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SE352496B|1968-02-15|1972-12-27|Danfoss As|
    US3707668A|1971-12-16|1972-12-26|Precision Products Co|Compound inverter of variable output voltage and frequency|
    US3838330A|1973-04-13|1974-09-24|Westinghouse Electric Corp|Arrangement and method for converting electrical power without external supply of reactive power requirements|
    US3924173A|1973-06-28|1975-12-02|Sushil Kumar Goswami|Commutation circuits in inverter circuits|
    CS169899B1|1974-09-12|1976-07-29|CS214533B1|1980-04-02|1982-04-09|Jiri Winkler|Connection of the current alterner with proper commutation|
    WO1986003903A1|1984-12-20|1986-07-03|Proizvodstvennoe Obiedinenie "Tallinsky Elektrotek|Autonomous inverter|
    KR890001475B1|1986-01-11|1989-05-04|한국과학 기술원|Inverter|
    US5214366A|1989-11-13|1993-05-25|Siemens Aktiengesellschaft|Three-phase converter for polyphase induction motors|
    DE4441758A1|1994-11-23|1996-05-30|Siemens Ag|Method and device for reducing harmonic network effects of a self-guided multi-level inverter|
    US5933339A|1998-03-23|1999-08-03|Electric Boat Corporation|Modular static power converter connected in a multi-level, multi-phase, multi-circuit configuration|
    US6340851B1|1998-03-23|2002-01-22|Electric Boat Corporation|Modular transformer arrangement for use with multi-level power converter|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CS7940A|CS215272B1|1979-01-02|1979-01-02|Connection of the current alternator with proper commutation|
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