CN114400830B - Double-flyback switch reluctance pulse power generation system with double-winding structure - Google Patents
Double-flyback switch reluctance pulse power generation system with double-winding structure Download PDFInfo
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- CN114400830B CN114400830B CN202111682294.7A CN202111682294A CN114400830B CN 114400830 B CN114400830 B CN 114400830B CN 202111682294 A CN202111682294 A CN 202111682294A CN 114400830 B CN114400830 B CN 114400830B
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- 238000004804 winding Methods 0.000 title claims abstract description 115
- 238000010248 power generation Methods 0.000 title claims abstract description 29
- 230000005284 excitation Effects 0.000 claims abstract description 26
- 238000011217 control strategy Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000011160 research Methods 0.000 description 6
- 230000005347 demagnetization Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- 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
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/12—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal
- H02P9/123—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal for demagnetising; for reducing effects of remanence
Abstract
The invention discloses a double-flyback switch reluctance pulse power generation system with a double-winding structure, which comprises the following components: the device comprises a double flyback power converter, a double-winding switch reluctance pulse generator, a motor control system, an excitation power supply, a pulse load and a prime motor. The invention is a novel pulse source with small volume, simple structure, low cost and good environmental adaptability, and has long service life, low maintenance cost and low requirement on the input quality of the prime motor under severe environment; the initial power and energy of the double-winding switch reluctance pulse generator are directly from the prime motor, so that a large number of intermediate links are omitted, and the energy conversion efficiency of a pulse source and the miniaturization and integration of the device are improved; the structure topology, the converter topology and the control strategy of the switch reluctance pulse generator are flexible, and the switch reluctance pulse generator has good adaptability under the condition of complex working conditions such as power supply load type change, random open circuit and the like, and can meet the industrial application requirements of pulse power technology.
Description
Technical Field
The invention relates to the technical field of pulse power, in particular to a double-flyback switch reluctance pulse power generation system with a double-winding structure.
Background
Pulse power technology is an emerging discipline for studying high power, high voltage, and high current, and a typical pulse power device comprises four parts, namely a primary energy source, an energy storage or pulse generation system, a pulse forming system, and a pulse load. It is an emerging science and technology field which researches to store energy for a relatively long time, and through rapid compression and conversion, finally, release the energy to a load effectively, and is one of the main basic subjects of modern high-tech. In the past, the high pulse power technology is mainly national defense scientific research service and is mainly single pulse operation, but in practical application, the high pulse power technology is often required to have high pulse source power density and high pulse repetition frequency, can provide high average power, and how to meet the requirements in practical industrial application becomes a research hot spot of the pulse power technology. Pulse power technology has been developed and rapidly developed in the fields of controllable nuclear fusion research and plasma physics research, emerging strong laser, high-energy electron and ion accelerator, electromagnetic pulse, new weapon research and the like, and meanwhile, the application of the pulse power technology is gradually developed to the civil science and technology fields such as flue gas desulfurization and denitrification, wastewater treatment, sea water desalination, medical equipment, electric spark machining and the like.
The switch reluctance motor (Switched Reluctance Machine is called SRM for short) is a novel motor proposed in the last eighties of century, and because the stator and the rotor of the motor are of salient pole solid lamination structures, concentrated windings are wound on the stator, and the rotor is free of windings, permanent magnet materials and other structures, the motor is simple and firm in structure and low in cost. Meanwhile, the switch reluctance motor has the advantages of multiple controllable parameters, flexible control, high efficiency, good starting performance and the like, so that the switch reluctance motor is widely applied to the fields of electric vehicle driving systems, household appliances, general industry, servo driving, mining machinery and the like. The switched reluctance generator (Switched Reluctance Generator, SRG for short) has all the advantages of an SRM system, is widely used as an energy conversion device, can convert mechanical energy applied to a generator rotor by a prime mover into electric energy to be transmitted to a load during the preset rotor angle by controlling the on-off of a switch tube through a controller, has the pulse current source characteristic of high output impedance, and is very suitable for high-voltage pulse power supply occasions.
Conventional pulse sources typically power-convert electrical energy and regulate the output pulse waveform through a pulse shaping circuit. The storage battery using the electrochemical energy storage technology has the highest energy storage density, but the power density of the storage battery is short, so that the requirement of high-power load is difficult to meet; the capacitor for electric field energy storage has the highest power density, but the energy storage density is limited, and the volume of the matched charging device is overlarge, so that the complexity of the whole system is high. Conventional pulse sources are typically bulky, complex, expensive and require a high level of operating environment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-flyback switch reluctance pulse power generation system with a double-winding structure, which has better adaptability under the conditions of changing power supply load types and complicating working conditions and can meet the industrial application requirements of pulse power technology.
In order to solve the technical problems, the invention provides a double-flyback switched reluctance pulse power generation system with a double-winding structure, which comprises: the double flyback power converter 1, the double-winding switch reluctance pulse generator 2, the motor control system 3, the exciting power supply 5, the prime mover 9, the pulse load 10 and the power diode 11; the motor control system 3 is connected with the double flyback power converter 1 to control the on-off of a switching tube therein, the exciting power supply 5 supplies power to the motor winding 4 in the double-winding switched reluctance pulse generator 2 through the power converter 1, the prime mover 9 is coaxially connected with the double-winding switched reluctance pulse generator 2 and provides mechanical energy to drive the rotor to rotate, and the pulse winding in the motor winding 4 is connected with the power diode 11 in series to supply power to the pulse load 10 in a pulse mode.
Preferably, the double flyback power converter 1 adopts an asymmetric half-bridge structure at the excitation winding side, each phase branch is provided with two switching tube control windings for excitation, and a follow current loop is formed by two diodes for current feedback; the pulse load at the pulse winding side is connected with the diode in series, and forms a flyback circuit with the exciting winding side, and a mode of supplying power to the pulse load jointly or independently by each phase is adopted according to different pulse power supply requirements.
Preferably, the double-winding switch reluctance pulse generator 2 body adopts a single-phase structure, a two-phase structure, a three-phase structure or a multi-phase structure.
Preferably, two sets of motor windings 4 are arranged on each tooth of the stator of the double-winding switch reluctance pulse generator 2, and are respectively an excitation winding A 1 And pulse winding A 2 The method comprises the steps of carrying out a first treatment on the surface of the Exciting winding A 1 And pulse winding A 2 Highly coupled and electrically isolated between windings, winding A 1 、A 2 The turn ratio between the two is adjustable, and the pulse power supply requirements of different voltage classes are met.
Preferably, the motor control system 3 comprises a voltage sensor 6, a current sensor 7 and a position sensor 8; the voltage sensor 6 is used for monitoring bus voltage, the current sensor 7 is used for detecting each phase of current and bus current, the position sensor 8 is used for collecting rotor position signals, and the motor control system 3 controls the on-off of a switching tube of the power converter to complete the processes of motor winding excitation and pulse power generation by monitoring the parameters.
Preferably, the motor control system 3 adopts an angular position control APC, a current chopping control CCC and a voltage pulse width modulation PWM mode to adjust the motor operation state, so as to control the amplitude, frequency and pulse width parameters of the output pulse.
The beneficial effects of the invention are as follows: the invention is a novel pulse source with small volume, simple structure, low cost and good environmental adaptability, and has long service life, low maintenance cost and low requirement on the input quality of the prime motor under severe environment; the initial power and energy of the double-winding switch reluctance pulse generator are directly from the prime motor, so that a large number of intermediate links are omitted, and the energy conversion efficiency of a pulse source and the miniaturization and integration of the device are improved; the structure topology, the converter topology and the control strategy of the switch reluctance pulse generator are flexible, and the switch reluctance pulse generator has better adaptability under the conditions of changing the power supply load type and complicating working conditions, and can meet the industrial application requirements of the pulse power technology.
Drawings
FIG. 1 is a schematic diagram of a dual-winding structure dual-flyback switched reluctance pulse power generation system according to the present invention.
FIG. 2 is a schematic diagram of a winding structure distribution of a dual-winding switched reluctance generator according to the present invention.
FIG. 3 is a schematic diagram of a dual winding switched reluctance pulse generator power converter according to the present invention.
Fig. 4 is a schematic diagram of the current flow when the system of the present invention is operating in an excitation mode.
FIG. 5 is a schematic diagram of the current flow of the system of the present invention operating in a freewheel power generation mode.
FIG. 6 is a schematic diagram of the current flow of the system of the present invention operating in freewheel power generation mode two.
FIG. 7 is a schematic diagram of the current flow of the system of the present invention operating in freewheel power generation mode three.
Fig. 8 is a waveform diagram of winding current when the load is 100deg.C resistor in the present invention.
Fig. 9 is a waveform diagram of winding current when a 200V battery pack is loaded in the present invention.
Fig. 10 is a waveform diagram of winding current when the load is 300V battery pack in the present invention.
Fig. 11 is a graph of winding current waveforms for secondary side open circuit or pulse load random open circuit in the present invention.
Detailed Description
As shown in fig. 1, a dual-winding structure dual-flyback switched reluctance pulse power generation system includes: the double flyback power converter 1, the double-winding switch reluctance pulse generator 2, the motor control system 3, the exciting power supply 5, the prime mover 9, the pulse load 10 and the power diode 11; the motor control system 3 is connected with the double flyback power converter 1 to control the on-off of a switching tube therein, the exciting power supply 5 supplies power to the motor winding 4 in the double-winding switched reluctance pulse generator 2 through the power converter 1, the prime mover 9 is coaxially connected with the double-winding switched reluctance pulse generator 2 and provides mechanical energy to drive the rotor to rotate, and the pulse winding in the motor winding 4 is connected with the power diode 11 in series to supply power to the pulse load 10 in a pulse mode.
The double-winding switch reluctance motor 2 can adopt a single-phase structure (comprising 4/4, 6/6 and the like), a two-phase structure (comprising 4/2, 8/4 and the like), a three-phase structure (comprising 6/4, 12/8 and the like) or a multi-phase structure, and two sets of motor windings 4 which are highly coupled are respectively an excitation winding and a pulse winding are arranged on each tooth of a generator stator. The field windings and the pulse windings in the same phase may be connected in parallel in addition to the series arrangement shown in fig. 1. The exciting winding and the pulse winding are highly coupled, the specific winding mode can take various forms, as two typical winding modes are shown in fig. 2, two sets of windings are concentrically wound on each stator tooth, and the exciting winding and the pulse winding are stacked up and down and are nested inside and outside.
The control strategy of the motor control system 3 in the invention can adopt modes of Angle Position Control (APC), current Chopping Control (CCC), voltage Pulse Width Modulation (PWM) and the like to adjust the running state of the motor. The system is provided with a voltage sensor, a current sensor and a position sensor which are respectively used for collecting bus voltage signals, current of each phase and rotor position signals. The motor control system controls the on-off of the switching tube to regulate and control the excitation and resetting processes of the excitation winding by monitoring the parameters, so that parameters such as amplitude, frequency, pulse width and the like of output pulses are regulated and controlled.
The dual flyback power converter 1 part of the dual-winding structure dual-flyback switch reluctance pulse power generation system takes a three-phase structure as an example, and adopts the structure in fig. 3. The power converter in the system comprises an excitation part and a pulse power generation part, and is correspondingly connected with an excitation winding and a pulse winding in the motor. The exciting power supply supplies power to the three-phase exciting winding of the switch reluctance motor through the primary side asymmetric half-bridge circuit in fig. 3, and the secondary side pulse winding is connected with a diode in series to form a flyback circuit to supply power to the pulse load as shown in fig. 3. For the whole pulse power generation system, the excitation part is electrically isolated from the pulse power supply part and is highly coupled on a magnetic field, so that the efficient transmission of pulse energy from the excitation part to the pulse shaping part is realized. The main switching device of the asymmetric half-bridge topology of the excitation part adopts a power field effect transistor or an insulated gate transistor, and the follow current device adopts a diode; the pulse power supply part is connected with a diode in series to form a flyback pulse output circuit.
In the following, for convenience of explanation, four different operation modes of the dual-winding dual-flyback switched reluctance pulse power generation system are explained by taking the change of the operation state of the single-phase power converter of the switched reluctance pulse power generation system in fig. 3 as an example. The excitation mode is shown in figure 4, the primary side switching tube is on, the secondary side diode is off, and the excitation power supply is at voltage V bus Exciting the primary exciting winding, and continuously increasing the current in the exciting winding. The follow current power generation mode is shown in figure 5, when the primary side switch tube is turned off, the counter potential of the primary side winding is greater than the exciting voltage V bus The free-wheeling diode is conducted, and the primary winding terminal voltage is clamped at-V bus Until the primary flywheel ends. The polarity of the secondary pulse winding voltage changes to lead the secondary diode to be conducted and supply power to the pulse load, and meanwhile, the secondary pulse winding end voltage is clamped to the converted V according to the turns ratio between windings bus . In the working mode, the primary exciting winding and the secondary pulse winding are in a power generation state, and the demagnetization process is completed together. The second follow current generation mode is shown in FIG. 6, after the follow current of the exciting winding is finished, the counter potential of the primary exciting winding is smaller than the exciting voltage V bus The primary flywheel diode is disconnected, and the secondary pulse winding continues to supply pulse loadAnd (5) independently finishing the demagnetization process of the secondary pulse winding. As shown in FIG. 7, for pulse loads such as corona breakdown and spark discharge or high-impedance characteristic loads (the loads tend to be randomly open), no output current is output by the pulse winding, and the counter potential of the secondary pulse winding is larger than the converted V bus At the moment, the primary winding is clamped in follow current, and the primary winding independently completes the power generation and demagnetization process. Most of the energy in the exciting winding is fed back to the primary exciting power supply, and the working state of the exciting winding is the same as that of a traditional switch reluctance generator.
Taking a double-flyback switch reluctance pulse generator with a three-phase 12/8 structure as an example, exciting current and pulse output current of each phase under different pulse load conditions are simulated by using Maxwell software. In the simulation, an excitation power supply is set to be 30V direct current, and the turns ratio of an excitation winding to a pulse winding is set to be 1:9, the rotation speed is constant at 6000rpm, and the opening angle theta on The pulse repetition frequency is 0.8kHz for each phase, and the three phases cooperatively supply 2.4kHz. Fig. 8 shows simulation experiment data when the pulse load is 100deg.C and the conduction width θ is 13 °, 14 ° and 15 ° respectively, and when a part of winding energy is fed back to a part of exciting power supply to supply power to the load, the system works in an exciting mode and a first freewheel power generation mode; as the excitation current peak value and the effective value are increased along with the increase of the conduction width, the pulse current waveform is similar to a square wave, the pulse width is about 0.39ms, the pulse rising time is about 0.02ms, the pulse current amplitude is slightly increased from 2.9A to 3.0A, and the output power is increased from 0.3kW to 0.35kW. Fig. 9 shows simulation experiment data when the pulse load is 200V and the conduction width θ is 13 °, 14 ° and 15 ° respectively, and the primary freewheeling diode is turned off, so that the pulse winding supplies power to the load to independently complete the demagnetization process, and the system operates in an excitation mode and a freewheeling power generation mode two; as the excitation current peak value and the effective value are increased along with the increase of the conduction width, the pulse current waveform is developed from an approximate square wave to a sharp peak wave, the pulse width is increased from 0.47ms to 0.53ms, the pulse rising time is about 0.02ms, the pulse current amplitude is increased from 31.5A to 57.9A, and the output power is increased from 3.6kW to 6.9kW. When the pulse load is 300V storage battery pack, no current is output on the load when the conduction width theta is 13 DEG and 14 DEG, and the pulse load is shown in figure 10 respectivelyFor simulation experiment data when the conduction width theta is 15 degrees, 16 degrees and 17 degrees, the secondary calculated voltage is larger than the exciting voltage, part of energy is fed back to the exciting power supply when the generating winding supplies power to the load, and the system works in an exciting mode and a follow current generating mode I; with the increase of the conduction width, the peak value and the effective value of the exciting current are obviously increased, the waveform of the pulse current is a sharp peak wave, the pulse width is increased from 0.30s to 0.46ms, the pulse rising time change is smaller and is about 0.20ms, the pulse current amplitude is increased from 5.8A to 27.7A, and the output power is increased from 0.4kW to 2.2kW. Under the condition of open circuit of pulse load or random open circuit of pulse load, no current is output on the load, the exciting winding feeds back electric energy to the exciting power supply to complete the power generation process, and the system works in an exciting mode and a follow current power generation mode III. The pulse power supply parameters can be continuously regulated and controlled through the structural design of the switch reluctance generator, the motor operation PWM, APC, CCC and the like, and the requirements of the industrial application on the corresponding pulse power supply parameters can be met.
Claims (4)
1. A dual-winding structure dual-flyback switched reluctance pulse power generation system, comprising: the double flyback power converter (1), a double-winding switch reluctance pulse generator (2), a motor control system (3), an excitation power supply (5), a prime motor (9), a pulse load (10) and a power diode (11); the motor control system (3) is connected with the double flyback power converter (1) to control the switching tube therein to be turned on and off, the exciting power supply (5) is used for exciting the motor winding (4) in the double-winding switched reluctance pulse generator (2) through the power converter (1), the prime mover (9) is coaxially connected with the double-winding switched reluctance pulse generator (2) and provides mechanical energy to drive the rotor to rotate, and the pulse winding in the motor winding (4) is connected with the power diode (11) in series to pulse power the pulse load (10);
the double flyback power converter (1) adopts an asymmetric half-bridge structure at the excitation winding side, each phase branch is provided with two switching tube control windings for excitation, and a follow current loop is formed by two diodes for current feedback; the pulse load at the pulse winding side is connected with the diode in series, and forms a flyback circuit with the exciting winding side, and a mode of supplying power to the pulse load by multiphase or independent phases is adopted according to different pulse power supply requirements;
two sets of motor windings (4) are arranged on each tooth of a stator of the double-winding switch reluctance pulse generator (2), and are respectively an excitation winding A 1 And pulse winding A 2 The method comprises the steps of carrying out a first treatment on the surface of the Exciting winding A 1 And pulse winding A 2 Highly coupled and electrically isolated between windings, winding A 1 、A 2 The turn ratio between the two is adjustable, and the pulse power supply requirements of different voltage classes are met.
2. The double-winding structure double-flyback switched reluctance pulse power generation system according to claim 1, wherein the double-winding switched reluctance pulse power generator (2) body adopts a single-phase structure, a two-phase structure, a three-phase structure or a multi-phase structure.
3. The dual-winding structure dual-flyback switched reluctance pulse power generation system according to claim 1, wherein the motor control system (3) comprises a voltage sensor (6), a current sensor (7) and a position sensor (8); the voltage sensor (6) is used for monitoring bus voltage, the current sensor (7) is used for detecting each phase of current and bus current, the position sensor (8) is used for collecting rotor position signals, and the motor control system (3) controls the on-off of a switching tube of the power converter to complete the excitation and pulse power generation process of the motor winding through monitoring the parameters.
4. The dual-winding structure dual-flyback switched reluctance pulse power generation system of claim 1 wherein the control strategy of the motor control system (3) adopts an angular position control APC, a current chopping control CCC and a voltage pulse width modulation PWM mode to adjust the running state of the motor so as to control the amplitude, frequency and pulse width parameters of the output pulse.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299553A (en) * | 2008-03-25 | 2008-11-05 | 南京航空航天大学 | Non-bearing switch reluctance motor complete-period electrification operating control method |
| CN112104277A (en) * | 2020-08-26 | 2020-12-18 | 南京航空航天大学 | Switched reluctance repetition frequency power pulse generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299553A (en) * | 2008-03-25 | 2008-11-05 | 南京航空航天大学 | Non-bearing switch reluctance motor complete-period electrification operating control method |
| CN112104277A (en) * | 2020-08-26 | 2020-12-18 | 南京航空航天大学 | Switched reluctance repetition frequency power pulse generator |
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