CN110071668B - High-speed switch reluctance generator current transformation system - Google Patents
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
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Abstract
A high-speed switched reluctance generator current transformation system comprises a current transformation circuit with the same structure of a three-phase winding consisting of a three-phase winding, eighteen diodes, fifteen capacitors and six switching tubes, and a variable excitation current transformation circuit; the current transformation circuits of the windings of all phases have the same structure and are connected in parallel, so that the expandability is strong; under the structure and the control method of the variable excitation converter circuit in the self-excitation mode, the excitation voltage can be adjusted in a wide range according to the requirement; each phase winding current transformation circuit is connected in parallel to directly obtain high voltage, so that part of current transformation links are saved; because the switching tube of each phase winding current transformation circuit works in a single pulse mode, the switching loss is low; meanwhile, the invention can support the realization of the latest continuous operation mode; each phase of winding is divided to obtain the excitation voltage independently, so that the excitation capacity is improved; and the whole system control method is simple and easy, and is suitable for various fields of the current high-speed switched reluctance generator.
Description
Technical Field
The invention relates to the field of switched reluctance generator systems, in particular to a converter of a high-speed switched reluctance generator and a control method thereof.
Background
The switched reluctance motor has simple structure, low cost, no winding on the rotor, small heat dissipation pressure and great application value as a generator.
At present, the switched reluctance generator systems which are more mature in commercial application are mostly operated at high speed.
In many fields applying the switched reluctance generator, a voltage which is much higher than the voltage directly output by the switched reluctance generator is often needed, and a circuit for increasing the voltage is needed to complete the operation.
The switched reluctance generator works in two major stages of excitation and power generation and carries out the two major stages in a time-sharing manner, the excitation stage absorbs electric energy, and the power generation stage releases the electric energy, so that in order to obtain positive power output, the electric energy released in the power generation stage is more than the electric energy absorbed in the excitation stage as much as possible, the energy storage operation time of the excitation stage is required to be as short as possible, and the current rises as fast as possible; in reality, each phase winding of the switched reluctance generator is not only provided with one winding but also is provided with two or integral multiples of the two windings, so that an objective condition is provided for separately exciting, further increasing exciting voltage and increasing exciting current establishing speed.
At present, the switched reluctance motor subject group of the university of bordegoriscan in black and mountain republic achieves a full-time continuous operation mode of each phase winding current when the switched reluctance generator operates, but most current conversion systems cannot well support the mode, for example, a plurality of switching tubes are required to operate in a PWM mode, and a large amount of switching loss is caused.
Considering that input mechanical power is unstable or when a load changes, output electric energy is required to be automatically adjusted or electric energy output capacity is required to be improved according to changes of surrounding conditions, the adjustability of an excitation power supply is an important and convenient operation regulation and control mode, but most of current variable excitation converter systems are limited in variation range, the ratio of the highest value to the lowest value is less than 3, the range is narrow, and the greater flexibility and the adaptability of the converter systems are limited.
Disclosure of Invention
According to the background technology, the invention provides a current transformation system structure for a high-speed switched reluctance generator and a control method thereof, and the current transformation system structure has the characteristics of strong expandability, low switching loss, adaptation to a continuous operation mode, direct voltage raising after double excitation and parallel connection, and wide excitation power supply change range.
The technical scheme of the invention is as follows:
a high-speed switch reluctance generator current transformation system comprises a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode, an eleventh diode, a twelfth diode, a thirteenth diode, a fourteenth diode, a fifteenth diode, a sixteenth diode, a seventeenth diode, an eighteenth diode, a nineteenth diode, a twentieth diode, a twenty-first diode, a first phase winding first winding, a first phase winding second winding, a second phase winding first winding, a second phase winding second winding, a third phase winding first winding, a third phase winding second winding, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, The high-voltage power supply comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, an isolation converter, a first inductor and a second inductor One end of the third capacitor, the anode of the fourth diode, the cathode of the second switch tube is connected with the other end of the first capacitor and the anode of the third diode, the other end of the third capacitor is connected with the cathode of the fifth diode and the anode of the sixth diode, the anode of the fifth diode is connected with the cathode of the fourth diode, one end of the fourth capacitor and one end of the fifth capacitor, the cathode of the sixth diode is connected with the other end of the fourth capacitor, one end of the ninth capacitor, the cathode of the twelfth diode, one end of the fourteenth capacitor, the cathode of the eighteenth diode and the input positive end of the isolating converter, the anode of the first diode is connected with the anode of the seventh diode, the anode of the thirteenth diode, one end of the first inductor, one end of the seventeenth capacitor, one end of the eighteenth capacitor and the cathode of the twenty-first diode, the cathode of the seventh diode is connected with one end of the first winding of the second phase winding, the other end of the first winding of the second phase winding is connected with the anode of the eighth diode, one end of the sixth capacitor and the anode of the third switching tube, the cathode of the eighth diode is connected with one end of the second winding of the second phase winding and one end of the seventh capacitor, the other end of the second winding of the second phase winding is connected with the anode of the fourth switching tube, one end of the eighth capacitor and the anode of the twelfth diode, the cathode of the fourth switching tube is connected with the other end of the sixth capacitor and the anode of the ninth diode, the other end of the eighth capacitor is connected with the cathode of the eleventh diode and the anode of the twelfth diode, the cathode of the twelfth diode is connected with the anode of the eleventh diode, the other end of the ninth capacitor and one end of the tenth capacitor, the other end of the first winding of the third phase winding is connected with the anode of the fifth switch tube, one end of the eleventh capacitor and the anode of the fourteenth diode, the cathode of the fourteenth diode is connected with one end of the second winding of the third phase winding and one end of the twelfth capacitor, the other end of the second winding of the third phase winding is connected with the anode of the sixth switch tube, one end of the thirteenth capacitor and the anode of the sixteenth diode, the cathode of the sixth switch tube is connected with the other end of the eleventh capacitor and the anode of the fifteenth diode, the other end of the thirteenth capacitor is connected with the cathode of the seventeenth diode and the anode of the eighteenth diode, the cathode of the sixteenth diode is connected with the anode of the seventeenth diode, the other end of the fourteenth capacitor and one end of the fifteenth capacitor, the cathode of the first switch tube is connected with the other, A cathode of a third switching tube, the other end of a seventh capacitor, a cathode of a ninth diode, the other end of a tenth capacitor, a cathode of a fifth switching tube, the other end of a twelfth capacitor, a cathode of a fifteenth diode, the other end of a fifteenth capacitor, one end of a second inductor, an anode of a twentieth diode, one end of a sixteenth capacitor, the other end of an eighteenth capacitor, and an input cathode end of an isolation converter, the positive output end of the isolation converter is connected with the anode of the nineteenth diode, the cathode of the nineteenth diode is connected with the anode of the seventh switch tube and the other end of the sixteenth capacitor, the cathode of the seventh switch tube is connected with the other end of the first inductor and the cathode of the twentieth diode, the negative output end of the isolation converter is connected with the cathode of the eighth switch tube and the other end of the seventeenth capacitor, and the anode of the eighth switch tube is connected with the other end of the second inductor and the anode of the twenty-first diode.
The invention discloses a control method of a high-speed switched reluctance generator current transformation system, which comprises the following steps:
according to the position information of the rotor of the switched reluctance generator, when a first phase winding and a second phase winding need to be put into operation, a first switching tube and a second switching tube are closed to excite the first phase winding and the second phase winding at the same time, and the first switching tube and the second switching tube are turned off at the same time when the excitation stage is finished according to the position information of the rotor, and the power generation stage is started;
according to the position information of the rotor of the switched reluctance generator, when a first winding and a second winding of a second phase winding need to be put into operation, a third switching tube and a fourth switching tube are closed simultaneously to excite the first winding and the second winding of the second phase winding, and the third switching tube and the fourth switching tube are turned off simultaneously when the excitation stage is finished according to the position information of the rotor, and a power generation stage is started;
according to the position information of the rotor of the switched reluctance generator, when a first winding and a second winding of a third phase winding are required to be put into operation, a fifth switching tube and a sixth switching tube are closed to excite the first winding and the second winding of the third phase winding at the same time, and the fifth switching tube and the sixth switching tube are turned off at the same time according to the end of the rotor position information excitation phase to enter a power generation phase;
during the working period of the switched reluctance generator, the seventh switching tube and the eighth switching tube are simultaneously switched on and off to carry out PWM mode work, and the duty ratio of the switched reluctance generator is determined according to the requirements of a first winding and a second winding of each phase winding on excitation voltage.
The invention has the following main technical effects:
(1) compared with the traditional asymmetric half-bridge type converter structure of a switched reluctance generator, the structure of each phase winding current transformation circuit only adds a plurality of uncontrollable switching devices such as capacitors and diodes, and importantly, the voltage of the output end of each phase winding current transformation circuit is far higher than the electromotive force of a phase winding, so that a voltage transformation circuit with a switching tube is not required to be added for boosting in a certain range.
(2) Because each phase winding of a typical switched reluctance generator is at least divided into two branch windings which are symmetrically distributed on the stator, the two branch windings are directly and separately connected, and respectively and directly bear the voltage from respective excitation power supplies, the reaction is faster, the excitation is more direct, which is important for the switched reluctance generator and creates conditions for reserving the power generation stage for a longer time and further improving the power generation output capability.
(3) The first capacitor to the fifteenth capacitor in each phase winding current transformation circuit can realize the excitation and the power generation of each phase winding not only according to the rotor position information by designing the capacitors with different capacitance values, but also can select whether the current of the phase winding is cut off or continuous before the next excitation comes after the power generation is finished, and particularly can meet the continuous current mode, thereby providing new hardware conditions for the leading-edge research practice of the switched reluctance generator industry on the continuous current type operation control in recent years.
(4) The output of each phase winding current transformation circuit is connected in parallel, so that the problem that the output voltage is averagely increased by three times but the power quality is low due to the characteristic of time-sharing operation of the switched reluctance generator in series connection is solved, the voltage of a capacitor at each output end can be neutralized to the maximum extent no matter the overlapping coefficient of a motor is large after the parallel connection, the output power quality is high, and the effect of high voltage transformation of each phase output in series of the traditional converter can be achieved due to the fact that the output voltage of each phase winding current transformation circuit is relatively increased.
(5) Two switching tubes in the variable excitation current converting circuit work in a switching mode simultaneously, high-frequency PWM is adopted, the output voltage is instantaneously zero when the two switching tubes are switched off, so that the total average output voltage is lower than that from an input end, the common practice that the overall requirement of the excitation voltage of the switched reluctance generator is averagely lower than the generation voltage at the output side is met, and importantly, the output excitation voltage can be adjusted by adjusting the duty ratios of the two switching tubes, so that the variable excitation current converting circuit makes a contribution to the improvement of the electric energy output capability of the switched reluctance generator, such as strengthening and accelerating the excitation; meanwhile, due to the fact that two switching tubes adopt a mode of changing excitation output in two ways, the fault tolerance is strong, namely if a loop where one switching tube is located fails, the other switching tube can continue to work; moreover, compared with the traditional direct current voltage transformation and current transformation circuit, the adjustable output voltage range of the variable excitation current transformation circuit can be wider.
(6) The structure of the invention has strong expandability, and except for the three-phase switched reluctance generator, no matter the switched reluctance generator with two phases, four phases or more phases, the invention only increases and deletes the number of the phase winding current transformation circuits.
(7) Except for the seventh switch tube and the eighth switch tube, each switch tube in each phase winding current transformation circuit works in a single pulse wave mode or a non-PWM mode, so that the switching loss in the system working process is greatly reduced, and the system efficiency and the running reliability are improved.
Drawings
Fig. 1 is a circuit diagram of a high-speed switched reluctance generator converter system according to the present invention.
In the figure, 11: a first phase winding current transformation circuit; 12: a second phase winding current transformation circuit; 13: a third phase winding current transformation circuit; 2: a variable excitation current transformation circuit.
Detailed Description
As shown in fig. 1, the high-speed switched reluctance generator converter system of this embodiment includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, a twelfth diode D10, an eleventh diode D10, a twelfth diode D10, a thirteenth diode D10, a fourteenth diode D10, a fifteenth diode D10, a sixteenth diode D10, a seventeenth diode D10, an eighteenth diode D10, a nineteenth diode D10, a twentieth diode D10, a twenty-first diode D10, a first phase winding M10, a first switching tube V10, a second switching tube V10, a third switching tube V10, a fourth switching tube V10, a fifth switching tube V10, a sixth switching tube V10, a seventh, An eighth switching tube V8, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C3, a fifth capacitor C3, a sixth capacitor C3, a seventh capacitor C3, an eighth capacitor C3, a ninth capacitor C3, a tenth capacitor C3, an eleventh capacitor C3, a twelfth capacitor C3, a thirteenth capacitor C3, a fourteenth capacitor C3, a fifteenth capacitor C3, a sixteenth capacitor C3, a seventeenth capacitor C3, an eighteenth capacitor C3, an isolation converter, a first inductor L3, and a second inductor L3, a cathode of the first diode D3 is connected to one end of the first phase winding M3, the other end of the first phase winding M3 is connected to an anode of the second diode D3, one end of the first capacitor C3, a first switching tube V3, an anode of the second diode D3 is connected to one end of the first phase winding M3, and the other end of the second diode D3 is connected to one end of the first switch M3, an anode of the second phase winding M3, one end of the second switch M3 is connected to one end of the first diode D3, and the second switch M, One end of a third capacitor C3, an anode of a fourth diode D4, a cathode of a second switching tube V2 is connected with the other end of the first capacitor C1 and an anode of a third diode D3, the other end of the third capacitor C3 is connected with a cathode of a fifth diode D5 and an anode of a sixth diode D6, an anode of the fifth diode D5 is connected with a cathode of a fourth diode D4, one end of a fourth capacitor C4 and one end of a fifth capacitor C5, a cathode of a sixth diode D6 is connected with the other end of a fourth capacitor C4, one end of a ninth capacitor C9, a cathode of a twelfth diode D12, one end of a fourteenth capacitor C14, a cathode of an eighteenth diode D18 and an isolation converter input positive end, an anode of a first diode D1 is connected with an anode of a seventh diode D1, an anode of a thirteenth diode D1, one end of a first inductor L1, one end of a seventeenth capacitor C1, one end of a twenty-phase capacitor C1, one end of a twenty-eighteenth diode D1, the other end of the first winding N1 of the second phase winding is connected with the anode of an eighth diode D8, one end of a sixth capacitor C6 and the anode of a third switching tube V3, the cathode of an eighth diode D8 is connected with one end of the second winding N2 and one end of a seventh capacitor C7, the other end of the second winding N2 of the second phase winding is connected with the anode of a fourth switching tube V4, one end of an eighth capacitor C8 and the anode of a twelfth diode D10, the cathode of a fourth switching tube V4 is connected with the other end of a sixth capacitor C6 and the anode of a ninth diode D9, the other end of an eighth capacitor C8 is connected with the cathode of an eleventh diode D11, the anode of a twelfth diode D12, the cathode of a twelfth diode D10 is connected with the anode of an eleventh diode D11, the other end of a ninth capacitor C9 and one end of a tenth capacitor C10, the cathode of a thirteenth diode D13 is connected with one end of a third winding P1, and the, One end of an eleventh capacitor C11, the anode of a fourteenth diode D14, the cathode of a fourteenth diode D14 is connected with one end of a third-phase winding secondary winding P2 and one end of a twelfth capacitor C12, the other end of the third-phase winding secondary winding P2 is connected with the anode of a sixth switching tube V6, one end of a thirteenth capacitor C13 and the anode of a sixteenth diode D16, the cathode of a sixth switching tube V6 is connected with the other end of an eleventh capacitor C11 and the anode of a fifteenth diode D15, the other end of a thirteenth capacitor C13 is connected with the cathode of a seventeenth diode D17 and the anode of an eighteenth diode D18, the cathode of a sixteenth diode D16 is connected with the anode of a seventeenth diode D17, the other end of a fourteenth capacitor C14 and one end of a fifteenth capacitor C15, the cathode of a first switching tube V1 is connected with the other end of a second capacitor C2, the cathode of a third diode D3, the cathode of a fifth capacitor C, The cathode of a ninth diode D9, the other end of a tenth capacitor C10, the cathode of a fifth switching tube V5, the other end of a twelfth capacitor C12, the cathode of a fifteenth diode D15, the other end of a fifteenth capacitor C15, one end of a second inductor L2, the anode of a twentieth diode D20, one end of a sixteenth capacitor C16, the other end of an eighteenth capacitor C18 and the input cathode of an isolation converter, the positive output end of the isolation converter is connected with the anode of a nineteenth diode D19, the cathode of a nineteenth diode D19 is connected with the anode of a seventh switching tube V7 and the other end of a sixteenth capacitor C16, the cathode of a seventh switching tube V7 is connected with the other end of a first inductor L1 and the cathode of a twentieth diode D20, the negative output end of the isolation converter is connected with the cathode of an eighth switching tube V8 and the other end of a seventeenth capacitor C17, and the anode of an eighth switching tube V573.
As shown in fig. 1, the first phase winding M is composed of a first phase winding M1 and a second phase winding M2, and the inverter circuit thereof is a first phase winding inverter circuit 11; the second phase winding N consists of a first phase winding N1 and a second phase winding N2, and the converter circuit in which the second phase winding N is arranged is a second phase winding converter circuit 12; the third phase winding P consists of a first winding P1 and a second winding P2 of the third phase winding, and the converter circuit in which the third phase winding is arranged is a third phase winding converter circuit 13; the variable excitation converter circuit 2 of the converter system of the invention is shown in figure 1.
The control method of the high-speed switched reluctance generator current transformation system comprises the steps that firstly, according to rotor position information of a switched reluctance generator, a current transformation circuit where each phase winding is located works in a time-sharing mode, and the working period is divided into an excitation stage and a power generation stage and is carried out in a time-sharing mode;
when the windings of each phase work, the needed excitation power supply comes from the variable excitation current-converting circuit 2, according to the requirement of the system on the voltage of the excitation power supply, the seventh switch tube V7 and the eighth switch tube V8 are controlled in a PMW mode, the duty ratio is adjusted according to the real-time requirement of the output excitation power supply voltage, the seventh switch tube V7 and the eighth switch tube V8 are switched simultaneously, when the inductor is switched on, two loops D19-V7-L1-C17 and D19-C16-L2-V8 are formed to charge the first inductor L1 and the second inductor L2, meanwhile, an excitation power supply is output, when the seventh switching tube V7 and the eighth switching tube V8 are disconnected, the stored energy of the first inductor L1 and the second inductor L2 are both output and released towards the eighteenth capacitor C18, in this way, the seventh switch tube V7 and the eighth switch tube V8 operate in the high frequency PWM mode, and the voltage at the output end, i.e., the eighteenth capacitor C18 side, can be adjusted by adjusting the duty ratio.
According to the position information of the rotor of the switched reluctance generator, when a first phase winding M1 and a second phase winding M2 are required to be put into operation, the first phase winding current transformation circuit 11 works, and the first switching tube V1 and the second switching tube V2 are closed and opened to excite the first phase winding M1 and the second phase winding M2, and the excitation loops are respectively as follows: D1-M1-V1 and C2-M2-V2-C1-V1, when the variable excitation converter circuit 2 outputs power as the excitation power of M1, the first capacitor C1 and the second capacitor C2 are used as the excitation power of M2, besides the above two excitation loops, when there is a loop working: C5-D5-C3-V2-C1-V1, and the loop is that a third capacitor C3 is charged; according to the rotor position information, when the excitation stage is finished, the first switch tube V1 and the second switch tube V2 are turned off at the same time, the power generation stage is started, at the moment, four power generation loops exist, the stored energy of the first phase winding M is released, and the four loops are respectively as follows: the first D-M-C-D, the first phase winding first winding M and input excitation power connect in series and charge the first capacitor C together, the second D-M-D-C, the first phase winding first winding M and input excitation power (eighteenth capacitor C side) connect in series and charge the second capacitor C together, the third D-M-D-M-D-C, the first phase winding first winding M second winding M and input excitation power connect in series and charge the output to the fifth capacitor C together, the fourth D-M-D-M-C-D-C, the first phase winding first winding M second winding M and input excitation power, the third capacitor C four connect in series and charge the output to the fourth capacitor C and fifth capacitor C together;
according to the position information of the rotor of the switched reluctance generator, when a first winding N1 and a second winding N2 of the second phase winding are required to be put into operation, the second phase winding current transformation circuit 12 works, and the third switching tube V3 and the fourth switching tube V4 are closed and switched on to excite the first winding N1 and the second winding N2 of the second phase winding, wherein the excitation loops are respectively as follows: D7-N1-V3 and C7-N2-V4-C6-V3, when the variable excitation converter circuit 2 outputs power as the excitation power of N1, the sixth capacitor C6 and the seventh capacitor C7 are used as the excitation power of N2, besides the above two excitation loops, when there is a loop working: C10-D11-C8-V4-C6-V3, the circuit is that the eighth capacitor C8 is charged by the tenth capacitor C10 and the sixth capacitor C6; according to the end of the rotor position information excitation phase, the third switch tube V3 and the fourth switch tube V4 are turned off at the same time, the power generation phase is started, at the moment, four power generation loops are provided, the stored energy of the second phase winding N is released, and the four loops are respectively as follows: the first D-N-C-D, the second phase winding first winding N and input excitation power connect in series and charge the sixth capacitor C together, the second D-N-D-C, the second phase winding first winding N and input excitation power (eighteenth capacitor C side) connect in series and charge the seventh capacitor C together, the third D-N-D-N-D-C, the second phase winding first winding N, second winding N and input excitation power connect in series and charge the output to the tenth capacitor C together, the fourth D-N-D-N-C-D-C-C, the second phase winding first winding N, second winding N, input excitation power, the eighth capacitor C connects in series and charge the output to the ninth capacitor C and tenth capacitor C together;
according to the position information of the rotor of the switched reluctance generator, when a first winding P1 and a second winding P2 of a third phase winding are required to be put into operation, the third phase winding current transformation circuit 13 works, and the fifth switching tube V5 and the sixth switching tube V6 are closed and opened to excite the first winding P1 and the second winding P2 of the third phase winding, and the excitation loops are respectively: D13-P1-53 and C12-P2-V6-C11-V5, when the variable excitation converter circuit 2 outputs power as the excitation power of P1, the eleventh capacitor C11 and the twelfth capacitor C12 are used as the excitation power of P2, besides the above two excitation loops, when there is a loop working: C15-D17-C13-V6-C11-V5, the circuit is that the thirteenth capacitor C13 is charged by the fifteenth capacitor C15 and the eleventh capacitor C11; according to the end of the rotor position information excitation phase, the fifth switching tube V5 and the sixth switching tube V6 are turned off at the same time, the power generation phase is started, at the moment, four power generation loops are arranged, the stored energy of the third phase winding P is released, and the four loops are respectively: the first D13-P1-C11-D15, the third phase winding P1 and the input excitation power supply are connected in series to charge the eleventh capacitor C11, the second D13-P1-D14-C12, the third phase winding P1 and the input excitation power supply (on the C18 side) are connected in series to charge the twelfth capacitor C12, the third D13-P1-D14-P2-D16-C15, the third phase winding P1, the second winding P2 and the input excitation power supply are connected in series to charge the fifteenth capacitor C15, the fourth D13-P1-D14-P2-C13-D18-C14-C15, the third phase winding, i.e., the first winding P1, the second winding P2, the input excitation power supply and the thirteenth capacitor C13 are connected in series to charge the fourteenth capacitor C14 and the fifteenth capacitor C15 and output the charged voltage.
From the above working modes, the working modes of the phase winding current transformation circuits are completely the same, the voltage of the output end of each phase winding current transformation circuit is obviously larger than the generated electromotive force of each phase winding, and the output ends of the phase windings are connected in parallel for improving the quality of the output power supply in consideration of the time-sharing work of each phase winding according to the position information of the rotor in the working process of the switched reluctance generator.
All the switch tubes of the embodiment are all control type power electronic switch devices, and a diode is connected in parallel in each switch tube in an anti-parallel mode.
Although the present embodiment describes a three-phase switched reluctance generator, it can be seen from the above that, for switched reluctance generators with other phases, the structure and control are the same, and only the problem of reducing or increasing the number of parallel converter circuits still belongs to the protection scope.
Claims (2)
1. A high-speed switch reluctance generator current transformation system comprises a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode, an eleventh diode, a twelfth diode, a thirteenth diode, a fourteenth diode, a fifteenth diode, a sixteenth diode, a seventeenth diode, an eighteenth diode, a nineteenth diode, a twentieth diode, a twenty-first diode, a first phase winding first winding, a first phase winding second winding, a second phase winding first winding, a second phase winding second winding, a third phase winding first winding, a third phase winding second winding, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, The high-voltage power supply comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, an isolation converter, a first inductor and a second inductor One end of the third capacitor, the anode of the fourth diode, the cathode of the second switch tube is connected to the other end of the first capacitor and the anode of the third diode, the other end of the third capacitor is connected to the cathode of the fifth diode and the anode of the sixth diode, the anode of the fifth diode is connected to the cathode of the fourth diode, one end of the fourth capacitor and one end of the fifth capacitor, the cathode of the sixth diode is connected to the other end of the fourth capacitor, one end of the ninth capacitor, the cathode of the twelfth diode, one end of the fourteenth capacitor, the cathode of the eighteenth diode and the input positive end of the isolating converter and serves as the output positive end of the current converting system, the anode of the first diode is connected to the anode of the seventh diode, the anode of the thirteenth diode, one end of the first inductor, one end of the seventeenth capacitor, one end of the eighteenth, The twenty-first diode cathode, the seventh diode cathode are connected with one end of the first winding of the second phase winding, the other end of the first winding of the second phase winding is connected with the anode of the eighth diode, one end of the sixth capacitor and the anode of the third switching tube, the cathode of the eighth diode is connected with one end of the second winding of the second phase winding and one end of the seventh capacitor, the other end of the second winding of the second phase winding is connected with the anode of the fourth switching tube, one end of the eighth capacitor and the anode of the twelfth diode, the cathode of the fourth switching tube is connected with the other end of the sixth capacitor and the anode of the ninth diode, the other end of the eighth capacitor is connected with the cathode of the eleventh diode and the anode of the twelfth diode, the cathode of the twelfth diode is connected with the anode of the eleventh diode, the other end of the ninth capacitor and one end of the tenth capacitor, the other end of the first winding of the third phase winding is connected with the anode of the fifth switch tube, one end of the eleventh capacitor and the anode of the fourteenth diode, the cathode of the fourteenth diode is connected with one end of the second winding of the third phase winding and one end of the twelfth capacitor, the other end of the second winding of the third phase winding is connected with the anode of the sixth switch tube, one end of the thirteenth capacitor and the anode of the sixteenth diode, the cathode of the sixth switch tube is connected with the other end of the eleventh capacitor and the anode of the fifteenth diode, the other end of the thirteenth capacitor is connected with the cathode of the seventeenth diode and the anode of the eighteenth diode, the cathode of the sixteenth diode is connected with the anode of the seventeenth diode, the other end of the fourteenth capacitor and one end of the fifteenth capacitor, the cathode of the first switch tube is connected with the, A cathode of a third switching tube, another end of a seventh capacitor, a cathode of a ninth diode, another end of a tenth capacitor, a cathode of a fifth switching tube, another end of a twelfth capacitor, a cathode of a fifteenth diode, another end of a fifteenth capacitor, one end of the second inductor, an anode of the twentieth diode, one end of the sixteenth capacitor, another end of an eighteenth capacitor, and an input cathode of an isolating converter, and serve as an output cathode of the current converting system, an output anode of the isolating converter is connected with an anode of the nineteenth diode, a cathode of the nineteenth diode is connected with an anode of the seventh switching tube and another end of the sixteenth capacitor, a cathode of the seventh switching tube is connected with another end of the first inductor and a cathode of the twentieth diode, an output cathode of the isolating converter is connected with a cathode of the eighth switching tube and another end of the seventeenth capacitor, A twenty-first diode anode.
2. The control method of the high-speed switched reluctance generator converter system according to claim 1, wherein according to the position information of the rotor of the switched reluctance generator, when the first winding and the second winding of the first phase winding are required to be put into operation, the first switching tube and the second switching tube are simultaneously closed to excite the first winding and the second winding of the first phase winding, and when the excitation phase is finished according to the position information of the rotor, the first switching tube and the second switching tube are simultaneously closed to enter the power generation phase;
according to the position information of the rotor of the switched reluctance generator, when a first winding and a second winding of a second phase winding need to be put into operation, a third switching tube and a fourth switching tube are closed simultaneously to excite the first winding and the second winding of the second phase winding, and the third switching tube and the fourth switching tube are turned off simultaneously when the excitation stage is finished according to the position information of the rotor, and a power generation stage is started;
according to the position information of the rotor of the switched reluctance generator, when a first winding and a second winding of a third phase winding are required to be put into operation, a fifth switching tube and a sixth switching tube are closed to excite the first winding and the second winding of the third phase winding at the same time, and the fifth switching tube and the sixth switching tube are turned off at the same time according to the end of the rotor position information excitation phase to enter a power generation phase;
during the working period of the switched reluctance generator, the seventh switching tube and the eighth switching tube are simultaneously switched on and off to carry out PWM mode work, and the duty ratio of the switched reluctance generator is determined according to the requirements of a first winding and a second winding of each phase winding on excitation voltage.
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