CN105207515A - Repetition frequency pulse power current source - Google Patents
Repetition frequency pulse power current source Download PDFInfo
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- CN105207515A CN105207515A CN201510591452.6A CN201510591452A CN105207515A CN 105207515 A CN105207515 A CN 105207515A CN 201510591452 A CN201510591452 A CN 201510591452A CN 105207515 A CN105207515 A CN 105207515A
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Abstract
The invention relates to the technical field of pulse power, in particular to a repetition frequency pulse power current source which is composed of a primary energy source-preceding stage DC/DC or AC/DC convertor, an intermediate energy storing device and pulse forming topology. According to the repetition frequency pulse power current source, automatic control over the size of currents charged from a primary energy source to the intermediate energy storing device in the pulse power occurring and pulse power interval stage is achieved; buck topology, at the low edge, of a power switch tube is adopted as a power conversion circuit, and the circuit is simple and easy to achieve; control is precise, and dynamic responding is fast; the pulse edge is steep, and feedback regeneration of energy can be achieved; the repetition frequency and the pulse width of pulse power occurrence can be changed.
Description
Technical field
The present invention relates to technical field of pulse power, particularly relate to a kind of repetitive frequency pulsed power current source.
Background technology
Impulse power electrical source is a kind of accumulation energy within the time relatively grown and the particular power source it discharged fast, its objective is raising transient power.The characteristic parameter of pulse comprises voltage levvl, and the rise time etc. depend on the demand of pulse load.The most initial pulse power is pulse, for producing high peak power in military and nuclear industry, and the electric pressure of the pulse power of repetition rate is lower, but food processing, therapeutic treatment, waste water treatment, exhaust-gas treatment, ozone manufacture, engine ignition is widely used in, ion implantation, materials processing etc.
Traditional Marx generator, magnetic pulse compression, the schemes such as pulse forming network exist that efficiency is low, the shortcoming such as very flexible and complex structure.In today that power electronic technology and power semiconductor technologies develop rapidly, switch converters is used to make impulse power electrical source.Because most pulse power application scenario has capacitance-resistance or LC characteristic, therefore current source type topology can be used to provide pulse power.
The topology that current pulse current source often adopts has: Buck topology, Buck and bridge-type inverter series connection, synchronous Buck type topology and Buck-Boost are topological.The derivative topology of these buck classes does voltage-regulation and overcurrent protection by feedback control loop usually.The temporal variations at the response time specific output load pulse edge of control loop is much slow.Therefore, power conversion lags behind porch demand and can form the slow and pulse overshoot of pulse climbing speed when pulse starts, and can form pulse stretching when end-of-pulsing.The more important thing is, control loop can not respond the Rapid Variable Design of input voltage and output voltage in a switch periods, cannot the edge of temporal variations of trace pulse load.In this case, pulse current source just cannot meet the requirement of the application scenario paired pulses edge steepness such as similar laser pumping, laser lighting.
Summary of the invention
For the defect existed in prior art or deficiency, technical problem to be solved by this invention is: provide a kind of repetitive frequency pulsed power current source, possesses the automatic control of intermediate energy storage device charge power, pulse generation topological structure is simple, control accurately, dynamic response is fast, and porch is precipitous, energy feedback regenerates, the features such as controlled repetition rate and pulse duration.
To achieve these goals, the technical scheme that the present invention takes is for providing a kind of repetitive frequency pulsed power current source, comprise primary energy transform part, intermediate energy storage device and pulse shaping topology, described primary energy transform part comprises converter, first current detection circuit, electric current and voltage dual-loop control circuit, energy storage device, energy storage device voltage detecting circuit, described electric current and voltage dual-loop control circuit is for controlling converter work, described first current detection circuit is used for providing detected energy to described electric current and voltage dual-loop control circuit, described energy storage device is for receiving the energy saved and provide from converter, described energy storage device voltage detecting circuit is used for carrying out voltage detecting to described energy storage device,
Described intermediate energy storage device comprises electric capacity battle array, super capacitor and storage battery;
Described pulse shaping topology comprises low limit buck code converter, Pulse Width Control switch, Hysteresis control circuit, the second current detection circuit and sequential control circuit, described second current detection circuit is used for providing detected energy to described Hysteresis control circuit, the break-make of low limit buck code converter described in described Hysteresis control control circui, described Pulse Width Control switch comprises the first Pulse Width Control switch and the second Pulse Width Control switch of series connection, and described first Pulse Width Control switch and described second Pulse Width Control switch are controlled to open or turn off by described sequential control circuit.
As a further improvement on the present invention, described low limit buck code converter comprises main power change switch, topological inductance, fly-wheel diode, oad freewheels diode, energy feedback diode, and the form of energy energy of described intermediate energy storage device being obtained pulse load demand by the mode conversion of this switch on and off is responsible for by described main power change switch; Described topological inductance is used for described main power change switch and is carrying out the energy compression in energy conversion process; Described fly-wheel diode is used for providing continuous current circuit to energy storage inductor when main power change switch turns off; Described oad freewheels diode is used for providing continuous current circuit for the inductive part of pulse load, and makes load obtain steeper porch; Described energy feedback diode is for the dump energy stored in inductance provides circulation path during pulse generation, and passes through this path by energy feedback in energy storage device; Described oad freewheels diode and described first Pulse Width Control switch and described second Pulse Width Control switch in parallel.
As a further improvement on the present invention, the sample circuit that described first current detection circuit or described second current detection circuit are Hall current testing circuit, sampling resistor adds the sample circuit of instrument amplifier, sampling resistor adds current mirror.
As a further improvement on the present invention, described converter is AC/DC converter or DC/DC converter.
As a further improvement on the present invention, described energy storage device voltage detecting circuit is resistance pressure-dividing network testing circuit or difference ratio voltage detecting circuit.
The invention has the beneficial effects as follows: realize pulse power occur and pulse power interval of rest primary energy to the automatic control of intermediate energy storage device charging current; Adopt the buck topology of power switch pipe on low limit as power conversion circuit, circuit is simply easy to realize; Control accurately, dynamic response is fast; Porch is precipitous, can realize the feedback regeneration of energy; Repetition rate and the pulse duration of pulse power generation can be changed.
Accompanying drawing explanation
Fig. 1 is pulse current source system schema block diagram of the present invention;
Fig. 2 is the switching sequence figure of pulse current source of the present invention;
Fig. 3 is inductive current and the load pulse current waveform figure of pulse current source of the present invention;
Fig. 4 is the pulse command of pulse current source of the present invention, the oscillogram of S1, S2 and S3;
Fig. 5 is the pulse command of pulse current source of the present invention, S1 load pulse electric current and inductive current oscillogram;
Wherein numeral: 1, converter; 2, the first testing circuit; 3, energy storage device voltage detecting circuit; 4, energy storage device; 5, electric current and voltage double-loop control; 6, the second current detection circuit; 7, Hysteresis control; 8, sequencing control; 9, pulse load.
Embodiment
Illustrate below in conjunction with accompanying drawing and embodiment the present invention is further described.
The break-make of main power change switch described in described Hysteresis control control circui
As shown in Figure 1, the invention provides a kind of repetitive frequency pulsed power current source, comprise primary energy transform part, intermediate energy storage device and pulse shaping topology, described primary energy transform part comprises converter 1, first current detection circuit 2, electric current and voltage dual-loop control circuit 5, energy storage device 4, energy storage device voltage detecting circuit 3, described electric current and voltage dual-loop control circuit 5 works for controlling converter 1, described first current detection circuit 2 provides detected energy for giving described electric current and voltage dual-loop control circuit 5, described energy storage device 4 is for receiving the energy saved and provide from converter 1, described energy storage device voltage detecting circuit 3 is for carrying out voltage detecting to described energy storage device 4,
As shown in Figure 1, described intermediate energy storage device comprises electric capacity battle array, super capacitor and storage battery;
As shown in Figure 1, described pulse shaping topology comprises low limit buck code converter, Pulse Width Control switch, Hysteresis control circuit 7, second current detection circuit 6 and sequential control circuit 8, described second current detection circuit 6 is for providing detected energy to described Hysteresis control circuit 7, described Hysteresis control circuit 7 controls the break-make of described low limit buck code converter, described Pulse Width Control switch comprises the first Pulse Width Control switch S 2 and the second Pulse Width Control switch S 3 of series connection, described first Pulse Width Control switch S 2 and described second Pulse Width Control switch S 3 are controlled to open or turn off by described sequential control circuit 8.The realization of Hysteresis control circuit detects inductive current, and it maximum, minimum set point with inductive current compared, and realize the control to master power switch pipe S1 in conjunction with pulse command.
As shown in Figure 1, described low limit buck code converter comprises main power change switch S1, topological inductance L, sustained diode 1, oad freewheels diode D3, energy feedback diode D2, S1 is main power change switch, S2 and S3 is pulse shaping control switch, L is topological inductance, and D1 is fly-wheel diode, and D2 is energy feedback diode, D3 is oad freewheels diode, the due to voltage spikes that when preventing S3 from turning off, the inductance characteristic of load connecting line causes.
Described main power change switch S1 is responsible for the form of energy energy of described intermediate energy storage device being obtained pulse load demand by the mode conversion of this switch on and off; Described topological inductance L is used for described main power change switch S1 and is carrying out the energy compression in energy conversion process; Described sustained diode 1 provides continuous current circuit to energy storage inductor when turning off for main power change switch S1; Described oad freewheels diode D3 is used for providing continuous current circuit for the inductive part of pulse load 9, and makes load obtain steeper porch; Described energy feedback diode D2 is for the dump energy stored in inductance provides circulation path during pulse generation, and passes through this path by energy feedback in energy storage device; Described oad freewheels diode D3 is in parallel with described first Pulse Width Control switch S 2 and described second Pulse Width Control switch S 3.Pulse shaping topology by power tube based on the buck converter on low limit, and access Pulse Width Control switch and energy feedback diode formation, the pulse power realizing high dynamic response in conjunction with sequencing control and Hysteresis control occurs, have that structure is simple, corresponding speed is fast, porch is precipitous, energy can the feature such as feedback regeneration.
As shown in Figure 1, the sample circuit that described first current detection circuit 2 or described second current detection circuit 6 are Hall current testing circuit, sampling resistor adds the sample circuit of instrument amplifier, sampling resistor adds current mirror.
As shown in Figure 1, primary energy can be AC power also can be DC power supply, and described converter 1 is AC/DC converter or DC/DC converter.Converter 1 provides energy to energy storage device, is an energy processes.Detect the control that converter realizes DC/DC or AC/DC converter to the charging current of energy storage device and energy storage device terminal voltage, in the pulse generation stage, energy storage device terminal voltage will be dragged down, impel electric current and voltage double-loop control automatically to set converter and provide energy with maximum current to energy storage device, and provide energy according to the power demand of energy storage device to energy storage device in the pulse interval stage.
As shown in Figure 1, described energy storage device voltage detecting circuit is resistance pressure-dividing network testing circuit or difference ratio voltage detecting circuit.
External pulse instruction to the time sequence control logic of three switching tubes, as shown in Figure 2.
First stage (t0-t1): inductive current ascent stage.Power change switch S1 and Pulse Width Control switch S 2 all closed, S2 is by load short circuits, and storage capacitor is only to induction charging, until inductive current reaches set point.
Second stage (t1-t2): pulse current output stage.In the t1 moment, inductive current reaches set point, and S2 turns off S3 conducting simultaneously, and inductive current is transferred to rapidly in load, and now S1 is by Hysteresis control break-make, and load current equals inductive current, and current value changes between maximin.
Three phases (t2-t3): end-of-pulsing energy feedback stage.In the t2 moment, end-of-pulsing, all switches all disconnect, load by D3 afterflow, inductance L by D1 and D2 by energy feedback to electric capacity C.
The pulse current waveform obtained via above-mentioned three phases as shown in Figure 3, Fig. 4, Fig. 5 give experimental result oscillogram, Fig. 4 shows the waveform being followed successively by pulse command, S1, S2 and S3 from top to bottom, and Fig. 5 shows to be followed successively by pulse command, S1 load pulse electric current and inductive current waveform from top to bottom.
The pulse power system Scheme Characteristics main manifestations of this patent is:
1, the automatic control of intermediate energy storage device charge power
Primary energy and pulse power occur by interconnected to middle energy storage device, by the power setting to middle energy storage device, can realize pulse power occur and pulse power interval of rest primary energy to the automatic control of intermediate energy storage device charging current.
2, pulse generation topological structure is simple
Adopt the buck topology of power switch pipe on low limit as power conversion circuit, circuit is simply easy to realize.
3, control accurately, dynamic response is fast
Adopt hysteretic loop current control, inductive current is limited between maximum current and minimum current, can realize accurately controlling to inductive current, also can change the control of minimax current value realization to inductive current size easily simultaneously, achieve the restriction to load current on the one hand, simultaneously in single cycle, response can be made to load current change, the stable output that has nothing to do with duty ratio and excellent transient response characteristic can be realized.
4, porch is precipitous
Access control switch S 2 and S3 between buck power transfer and load, by the break-make of specific sequencing control S2 and S3.Start the initial stage in pulse, S2 closes, and S3 turns off, and when inductive current rises to higher value, turns off S2, closed S3, and be transferred to instantaneously in load by larger inductor current value, load current rising edge is along precipitous; And when end-of-pulsing, the shutoff of control S3, load current reduces instantaneously, and trailing edge is precipitous.
5, energy feedback regeneration
When end-of-pulsing, also saving the energy of I^2L in inductance L, and the shutoff of S3 makes these energy not to load transmission, these energy cannot be kept in inductance simultaneously.Now, increase sustained diode 2 in circuit, inductive current forms closed loop through L, D1, D2 and C, charges to electric capacity C, realizes the feedback regeneration of energy.
6, controlled repetition rate and pulse duration
By generation and the end of pulse command determination pulse, the frequency of change pulse command and duty ratio can change repetition rate and the pulse duration of pulse power generation.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a repetitive frequency pulsed power current source, is characterized in that: comprise primary energy transform part, intermediate energy storage device and pulse shaping topology,
Described primary energy transform part comprises converter, the first current detection circuit, electric current and voltage dual-loop control circuit, energy storage device, energy storage device voltage detecting circuit, described electric current and voltage dual-loop control circuit is for controlling converter work, described first current detection circuit is used for providing detected energy to described electric current and voltage dual-loop control circuit, described energy storage device is for receiving the energy saved and provide from converter, and described energy storage device voltage detecting circuit is used for carrying out voltage detecting to described energy storage device;
Described intermediate energy storage device comprises electric capacity battle array, super capacitor and storage battery;
Described pulse shaping topology comprises low limit buck code converter, Pulse Width Control switch, Hysteresis control circuit, the second current detection circuit and sequential control circuit, described second current detection circuit is used for providing detected energy to described Hysteresis control circuit, the break-make of low limit buck code converter described in described Hysteresis control control circui, described Pulse Width Control switch comprises the first Pulse Width Control switch and the second Pulse Width Control switch of series connection, and described first Pulse Width Control switch and described second Pulse Width Control switch are controlled to open or turn off by described sequential control circuit.
2. repetitive frequency pulsed power current source according to claim 1, it is characterized in that: described low limit buck code converter comprises main power change switch, topological inductance, fly-wheel diode, oad freewheels diode, energy feedback diode, the form of energy energy of described intermediate energy storage device being obtained pulse load demand by the mode conversion of this switch on and off is responsible for by described main power change switch; Described topological inductance is used for described main power change switch and is carrying out the energy compression in energy conversion process; Described fly-wheel diode is used for providing continuous current circuit to energy storage inductor when main power change switch turns off; Described oad freewheels diode is used for providing continuous current circuit for the inductive part of pulse load, and makes load obtain steeper porch; Described energy feedback diode is for the dump energy stored in inductance provides circulation path during pulse generation, and passes through this path by energy feedback in energy storage device; Described oad freewheels diode and described first Pulse Width Control switch and described second Pulse Width Control switch in parallel.
3. repetitive frequency pulsed power current source according to claim 1, is characterized in that: the sample circuit that described first current detection circuit or described second current detection circuit are Hall current testing circuit, sampling resistor adds instrument amplifier, sampling resistor add the sample circuit of current mirror.
4. repetitive frequency pulsed power current source according to claim 1, is characterized in that: described converter is AC/DC converter or DC/DC converter.
5. repetitive frequency pulsed power current source according to claim 1, is characterized in that: described energy storage device voltage detecting circuit is resistance pressure-dividing network testing circuit or difference ratio voltage detecting circuit.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655871A (en) * | 2016-12-27 | 2017-05-10 | 杭州天明电子有限公司 | Energy-saving type narrow-pulse high voltage power supply |
| CN110967572A (en) * | 2019-09-04 | 2020-04-07 | 南京理工大学 | On-vehicle pulse power source voltage current fault rapid detection device |
| CN111900895A (en) * | 2020-07-14 | 2020-11-06 | 中国电子科技集团公司第十八研究所 | Multi-phase pulse power supply and pulse forming method |
| CN114598178A (en) * | 2022-03-15 | 2022-06-07 | 清华大学 | Method for compensating transient non-ideal characteristics of power electronic power pulse edge switch |
| CN117978133A (en) * | 2024-01-29 | 2024-05-03 | 华中科技大学 | Heavy frequency pulse current source generating device |
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| US20020180276A1 (en) * | 2001-05-31 | 2002-12-05 | Ngk Insulators, Ltd. | Circuit for generating high voltage pulse |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655871A (en) * | 2016-12-27 | 2017-05-10 | 杭州天明电子有限公司 | Energy-saving type narrow-pulse high voltage power supply |
| CN110967572A (en) * | 2019-09-04 | 2020-04-07 | 南京理工大学 | On-vehicle pulse power source voltage current fault rapid detection device |
| CN111900895A (en) * | 2020-07-14 | 2020-11-06 | 中国电子科技集团公司第十八研究所 | Multi-phase pulse power supply and pulse forming method |
| CN114598178A (en) * | 2022-03-15 | 2022-06-07 | 清华大学 | Method for compensating transient non-ideal characteristics of power electronic power pulse edge switch |
| CN114598178B (en) * | 2022-03-15 | 2024-07-12 | 清华大学 | Non-ideal characteristic compensation method for power electronic power pulse edge switch Guan Shuntai |
| CN117978133A (en) * | 2024-01-29 | 2024-05-03 | 华中科技大学 | Heavy frequency pulse current source generating device |
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