CN210041672U - High-power high-energy pulse power supply main circuit - Google Patents
High-power high-energy pulse power supply main circuit Download PDFInfo
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- CN210041672U CN210041672U CN201921244812.5U CN201921244812U CN210041672U CN 210041672 U CN210041672 U CN 210041672U CN 201921244812 U CN201921244812 U CN 201921244812U CN 210041672 U CN210041672 U CN 210041672U
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Abstract
The utility model discloses a high-power high-energy pulse power supply main circuit, which comprises a direct current power supply circuit, a pulse circuit and an RLC resonance coupling circuit which are sequentially connected, wherein the direct current power supply circuit comprises a three-phase inductance filter, a three-phase bidirectional thyristor inverter circuit, a high-frequency transformer and a three-phase rectifier filter circuit which are sequentially connected; the pulse circuit includes: the circuit comprises a first inductor, a second inductor, a first resistor, a second resistor, a first energy storage capacitor, a second energy storage capacitor, a first switching tube, a second switching tube, a first spike pulse absorption circuit, a second spike pulse absorption circuit, a first pulse transformer and a second pulse transformer; the pulse transformer is provided with 5 annular iron cores, primary side windings of the first pulse transformer and the second pulse transformer are wound in the 5 annular iron cores in a penetrating mode, the number of the wound turns is 2-8, and 5 secondary side windings of the first pulse transformer and the second pulse transformer are sequentially wound in the corresponding annular iron cores. The embodiment has the advantages of high output pulse voltage, large pulse current, high pulse energy, good output pulse waveform and the like, and has higher stability and reliability.
Description
Technical Field
The utility model belongs to the technical field of power electronic equipment, especially, relate to a high-power high energy pulse power supply main circuit.
Background
Electrostatic dust collection is widely applied to processing air pollution dust at present, and plays an important role in environmental protection. The traditional electric dust remover adopts a direct-current power supply mode, so that when high-specific-resistance dust is treated, the dust deposited on a dust collecting polar plate is difficult to release charges, back corona is easy to cause secondary flying of the dust, and the dust removing efficiency is not high; with the development of the IGBT technology, a high-frequency pulse power supply appears, and the dust removal efficiency is greatly improved; but still cannot obtain better dust removal effect on fine dust and high specific resistance dust and still cannot reach the emission standard required by the national standard; the high-energy pulse power supply is formed by superposing high-energy pulses on a direct-current component, has short pulse duration, effectively prevents back corona, has good dust removal effect on common dust particles and medium-low specific resistance dust, also has good improvement on high-specific resistance dust, and meets the new national standard requirement of 10mg/m3Even 5mg/m3The emission standard of (1). At present, most of high-energy pulse power supplies in the market are in the research and development stage, and certain problems exist in the working reliability and the stability of the high-energy pulse power supplies.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is that: in order to solve the problems of low stability and reliability and the like of most high-energy pulse power supplies in the prior art, the embodiment provides a main circuit of a high-power high-energy pulse power supply.
The technical scheme is as follows: the utility model provides a high-power high energy pulse power supply main circuit, this circuit includes: the direct current power supply circuit, the pulse circuit and the RLC resonance coupling circuit are sequentially connected;
the pulse circuit includes: the circuit comprises a first inductor, a second inductor, a first resistor, a second resistor, a first energy storage capacitor, a second energy storage capacitor, a first switching tube, a second switching tube, a first spike pulse absorption circuit, a second spike pulse absorption circuit, a first pulse transformer and a second pulse transformer; one end of the first inductor is connected with one end of the first energy storage capacitor through the first resistor; the other end of the first energy storage capacitor is connected with the first end of the primary side of the first pulse transformer; the other end of the first inductor is connected with the positive output end of the direct-current power supply circuit and one end of a second inductor, and the other end of the second inductor is connected with one end of a second energy storage capacitor through a second resistor; the other end of the second energy storage capacitor is connected with the first end of the primary side of the second pulse transformer; the second end of the primary side of the first pulse transformer is connected with the negative output end of the direct-current power supply circuit and the second end of the primary side of the second pulse transformer; the first switch tube and the second switch tube are connected with a diode in parallel in a reverse direction; a collector of the first switching tube is connected with one end of the first energy storage capacitor, and an emitter of the first switching tube is connected with a second end of the primary side of the first pulse transformer; a collector of the second switching tube is connected with one end of the second energy storage capacitor, and an emitter of the second switching tube is connected with a second end of the primary side of the second pulse transformer; the input end of the first sharp pulse absorption circuit is connected with the collector of the first switching tube, and the output end of the first sharp pulse absorption circuit is grounded; the input end of the second sharp pulse absorption circuit is connected with the collector of the second switching tube, and the output end of the second sharp pulse absorption circuit is grounded; the first end of the secondary side of the first pulse transformer is connected with one end of the RLC resonance coupling circuit, the second end of the secondary side of the second pulse transformer is connected with the first end of the secondary side of the second pulse transformer, and the second end of the secondary side of the second pulse transformer is grounded; and the other end of the RLC resonant coupling circuit is connected with a load.
The direct current power supply circuit further comprises a three-phase inductance filter, a three-phase bidirectional thyristor inverter circuit, a high-frequency transformer and a three-phase rectifier filter circuit which are sequentially connected.
Furthermore, the first spike pulse absorption circuit and the second spike pulse absorption circuit respectively comprise a first diode, a third capacitor and a third resistor; the anode of the first diode is connected with the collector of the first switching tube, the cathode of the first diode is connected with one end of a third capacitor, and the other end of the third capacitor is grounded; the third resistor is shown in parallel with the first diode.
Further, the RLC resonant coupling circuit comprises a high-voltage direct-current power supply, a third inductor, a fourth coupling capacitor and a fourth damping resistor; one end of the fourth coupling capacitor is connected with the first end of the secondary side of the first pulse transformer, and the other end of the fourth coupling capacitor is connected with one end of the third inductor and one end of the fourth damping resistor; the other end of the third inductor is connected with a high-voltage direct-current power supply; the other end of the fourth damping resistor is connected with a load.
Furthermore, the first pulse transformer and the second pulse transformer are identical in structure and are respectively provided with 5 annular iron cores, a primary side winding penetrates and winds the 5 annular iron cores, the number of winding penetrating turns is 2-8, and 5 secondary side windings connected in series are sequentially wound on the corresponding annular iron cores; the annular iron core is made of an ultra-microcrystalline material.
Furthermore, the first and second switch tubes adopt IGBTs, and are both connected with the same control signal.
Has the advantages that: the inverter circuit of the high-energy pulse power supply main circuit of the utility model adopts two groups of inverters to be connected in parallel, thus reducing the current bearing capacity of a single tube IGBT; two groups of TGBTs adopt synchronous driving, so that the phenomenon of step-out during the operation of two groups is avoided, and the operational reliability and stability of the inverter circuit are improved. The pulse transformer is composed of two groups of pulse transformer units, and the primary sides of the two pulse transformer units are connected in parallel to reduce the current carried by the IGBT; the secondary side is connected in series to improve the output voltage, the transformer core adopts a multi-core multi-magnetic circuit structure, the core adopts an ultracrystalline material and is composed of a plurality of annular cores, a primary winding is wound for 2-8 turns and is penetrated and wound in the multi-annular core, and a secondary winding is wound in the corresponding annular core, so that the alternating current skin effect and the proximity effect are reduced, the pulse transformer has small heat productivity and good heat dissipation effect; because the primary side winding has few turns and small leakage reactance, when the pulse circuit is used as a charge-discharge loop, the rising edge and the falling edge of the pulse are steeper, the utility model discloses the pulse output waveform that can be improved; just the utility model discloses a sharp pulse absorption circuit can protect IGBT not take place to damage because of bearing too high sharp pulse circuit on the one hand, has further improved pulse output waveform in addition.
Drawings
FIG. 1 is a schematic diagram of the present invention;
fig. 2 is an overall circuit diagram of the present invention;
fig. 3 is a schematic structural diagram of the pulse transformer of the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment provides a main circuit of a high-power high-energy pulse power supply, the functional block diagram of the circuit is shown in figure 1, and the high-power pulse power supply and a high-voltage direct-current power supply are applied to two ends of an electrostatic dust collector (load) through capacitive coupling and inductive coupling.
The circuit diagram of the present embodiment is shown in fig. 2, and includes a main circuit of a high-power high-energy pulse power supply and a control system; the main circuit comprises a high-voltage direct-current power supply circuit, a pulse circuit and an RLC coupling circuit; the control system comprises a detection circuit, a DSP controller, a power supply module and an IGBT driving module; the output of the main circuit is subjected to closed-loop control, protection and fault treatment through the circuit.
As shown in fig. 2, the main circuit of the high-power high-energy pulse power supply includes: the direct current power supply circuit comprises a three-phase inductance filter 1, a three-phase bidirectional thyristor inverter circuit 2, a high-frequency transformer 3 and a three-phase rectifier filter circuit 4 which are sequentially connected.
The pulse circuit includes: the pulse-width modulation circuit comprises a first inductor (51), a second inductor (52), a first resistor (61), a second resistor (62), a first energy-storage capacitor (91), a second energy-storage capacitor (92), a first switching tube (71), a second switching tube (72, in the embodiment, the switching tubes adopt IGBTs), a first spike pulse absorption circuit, a second spike pulse absorption circuit, a first pulse transformer (101), a second pulse transformer (102); one end of the first inductor 51 is connected to one end of the first energy storage capacitor 91 through the first resistor 61; the other end of the first energy storage capacitor 91 is connected with a first end of the primary side of the first pulse transformer 101; the other end of the first inductor 51 is connected to the positive output end of the dc power supply circuit and one end of the second inductor 52, and the other end of the second inductor 52 is connected to one end of the second energy-storage capacitor 92 through the second resistor 62; the other end of the second energy storage capacitor 92 is connected to a first end of the primary side of the second pulse transformer 102; a second end of the primary side of the first pulse transformer 101 is connected with a negative output end of the direct-current power supply circuit and a second end of the primary side of the second pulse transformer 102; the first and second switch tubes 71 and 72 are connected in parallel with a diode in reverse direction; a collector of the first switching tube 71 is connected to one end of the first energy storage capacitor 91, and an emitter thereof is connected to a second end of the primary side of the first pulse transformer 101; the collector of the second switch tube 72 is connected to one end of the second energy-storage capacitor 92, and the emitter is connected to the second end of the primary side of the second pulse transformer 102; the input end of the first spike absorption circuit is connected with the collector of the first switch tube 71, and the output end is grounded; the input end of the second spike pulse absorption circuit is connected with the collector of the second switch tube 72, and the output end is grounded; a first end of a secondary side of the first pulse transformer 101 is connected with one end of the RLC resonance coupling circuit, a second end of the secondary side of the second pulse transformer 102 is connected with a first end of the secondary side of the second pulse transformer 102, and a second end of the secondary side of the second pulse transformer 102 is grounded; and the other end of the RLC resonant coupling circuit is connected with a load.
The first spike pulse absorption circuit and the second spike pulse absorption circuit respectively comprise a first diode (81/82), a third capacitor (171/172) and a third resistor (161/162); the anode of the first diode is connected with the collector of the first switching tube, the cathode of the first diode is connected with one end of a third capacitor, and the other end of the third capacitor is grounded; the third resistor is connected in parallel with the first diode.
The RLC resonant coupling circuit comprises a high-voltage direct-current power supply 14, a third inductor 13, a fourth coupling capacitor 11 and a fourth damping resistor 12; one end of the fourth coupling capacitor is connected with the first end of the secondary side of the first pulse transformer, and the other end of the fourth coupling capacitor is connected with one end of the third inductor and one end of the fourth damping resistor; the other end of the third inductor is connected with a high-voltage direct-current power supply; the other end of the fourth damping resistor is connected with a load.
As shown in fig. 3, the first and second pulse transformers have the same structure and each have 5 toroidal cores, and a primary winding is wound in the 5 toroidal cores, and the number of windings wound is 2-8; the primary sides of the first pulse transformer and the second pulse transformer are connected in parallel; the 5 secondary side windings are sequentially wound in the corresponding annular iron cores, and the 5 secondary side windings are sequentially connected in series; the annular iron core is made of an ultra-microcrystalline material.
The main circuit of the high-power high-energy pulse power supply has the following specific working principle: the three-phase alternating current passes through the three-phase inductance filter, the three-phase bidirectional thyristor inverter circuit, the high-frequency transformer and the three-phase rectifier filter circuit to output adjustable direct current voltage Ups，UpsThe range of (2000) and (2500) V, the IGBT71 and the IGBT72 are driven synchronously, and when the IGBT71 and the IGBT72 are controlled to be turned off, the direct current power supply UpsThe inductor 52 and the resistor 62 charge the energy storage capacitors 91 and 92 through the inductor 51 and the resistor 61, respectively; when the switches of the IGBT71 and the IGBT72 are controlled to be switched on, the energy storage capacitors 91 and 92 form a series resonance loop through the leakage impedances of the transformers 101 and 102, the coupling capacitor 11, the damping resistor 12 and the dust remover to generate sine wave current, the sine wave current is boosted through the pulse transformers 101 and 102, and negative pulse voltage of cosine waves is formed at two ends of the dust remover; one pulse period, i.e. the resonance period T0Then, the IGBT71 and the IGBT72 are in soft turn-off, the resonant circuit is disconnected, the current in the circuit is zero, and the pulse voltage loaded at the two ends of the dust remover disappears; at the same time, the high-voltage DC power supply charges the capacitor 11 through the inductor 13, and only the high-voltage DC negative voltage-U is on the dust removerdc(ii) a And repeating the processes until the next pulse comes after a pulse repetition period, wherein the voltage obtained at two ends of the dust remover is a negative voltage superposed with the high-energy narrow negative pulse on the basis of the direct-current negative voltage. The two windings on the primary sides of the pulse transformers 101 and 102 are connected in parallel, so that the current borne by the IGBT is reduced, and the secondary sides are connected in series, so that the output voltage is improved; the first spike pulse absorption circuit and the second spike pulse absorption circuit protect the IGBT, prevent the IGBT from being damaged due to the fact that the IGBT bears too high spike pulse voltage, and improve output waveforms.
The voltage of the high-voltage direct-current power supply in the embodiment is 0-60KV, and the voltage amplitude can be adjusted to be proper for just starting corona; the current is 0.5-2.0A; the voltage of the pulse power supply is: the voltage is adjustable between 0kV and 80kV, the corona effect is good, and the pulse sparking rate is low; the pulse current is: 100-500A; the pulse width is adjustable within 75-120 us and is determined by circuit resonance parameters; the pulse frequency is adjustable at 50-400 Hz and is adjusted by the controller, so that the best corona effect is achieved, and the best dedusting effect is achieved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (6)
1. A high-power high-energy pulse power supply main circuit is characterized by comprising: the direct current power supply circuit, the pulse circuit and the RLC resonance coupling circuit are sequentially connected;
the pulse circuit includes: the circuit comprises a first inductor, a second inductor, a first resistor, a second resistor, a first energy storage capacitor, a second energy storage capacitor, a first switching tube, a second switching tube, a first spike pulse absorption circuit, a second spike pulse absorption circuit, a first pulse transformer and a second pulse transformer; one end of the first inductor is connected with one end of the first energy storage capacitor through the first resistor; the other end of the first energy storage capacitor is connected with the first end of the primary side of the first pulse transformer; the other end of the first inductor is connected with the positive output end of the direct-current power supply circuit and one end of the second inductor; the other end of the second inductor is connected with one end of a second energy storage capacitor through a second resistor; the other end of the second energy storage capacitor is connected with the first end of the primary side of the second pulse transformer; the second end of the primary side of the first pulse transformer is connected with the negative output end of the direct-current power supply circuit and the second end of the primary side of the second pulse transformer; the first switch tube and the second switch tube are connected with a diode in parallel in a reverse direction; a collector of the first switching tube is connected with one end of the first energy storage capacitor, and an emitter of the first switching tube is connected with a second end of the primary side of the first pulse transformer; a collector of the second switching tube is connected with one end of the second energy storage capacitor, and an emitter of the second switching tube is connected with a second end of the primary side of the second pulse transformer; the input end of the first sharp pulse absorption circuit is connected with the collector of the first switching tube, and the output end of the first sharp pulse absorption circuit is grounded; the input end of the second sharp pulse absorption circuit is connected with the collector of the second switching tube, and the output end of the second sharp pulse absorption circuit is grounded; the first end of the secondary side of the first pulse transformer is connected with one end of the RLC resonance coupling circuit, the second end of the secondary side of the second pulse transformer is connected with the first end of the secondary side of the second pulse transformer, and the second end of the secondary side of the second pulse transformer is grounded; and the other end of the RLC resonant coupling circuit is connected with a load.
2. The main circuit of claim 1, wherein the dc power circuit comprises a three-phase inductance filter, a three-phase bidirectional thyristor inverter circuit, a high-frequency transformer and a three-phase rectifier filter circuit, which are sequentially connected.
3. The main circuit of claim 1, wherein the first and second spike absorption circuits each comprise a first diode, a third capacitor and a third resistor; the anode of the first diode is connected with the collector of the first switching tube, the cathode of the first diode is connected with one end of a third capacitor, and the other end of the third capacitor is grounded; the third resistor is shown in parallel with the first diode.
4. The main circuit of claim 1, wherein the RLC resonant coupling circuit comprises a high voltage dc power supply, a third inductor, a fourth coupling capacitor, and a fourth damping resistor; one end of the fourth coupling capacitor is connected with the first end of the secondary side of the first pulse transformer, and the other end of the fourth coupling capacitor is connected with one end of the third inductor and one end of the fourth damping resistor; the other end of the third inductor is connected with a high-voltage direct-current power supply; the other end of the fourth damping resistor is connected with a load.
5. The main circuit of claim 1, wherein the first and second pulse transformers have the same structure and each have 5 toroidal cores, the primary winding is wound through the 5 toroidal cores, the number of windings is 2-8, and the 5 serially connected secondary windings are sequentially wound on the corresponding toroidal cores; the annular iron core is made of an ultra-microcrystalline material.
6. The main circuit of claim 1, wherein the first and second switching tubes are IGBTs, and both the first and second switching tubes are connected to the same control signal.
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| CN201921244812.5U CN210041672U (en) | 2019-08-02 | 2019-08-02 | High-power high-energy pulse power supply main circuit |
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| CN201921244812.5U CN210041672U (en) | 2019-08-02 | 2019-08-02 | High-power high-energy pulse power supply main circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285627A (en) * | 2021-04-12 | 2021-08-20 | 中科石金(安徽)中子技术有限公司 | Pulse power supply system and neutron generator |
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2019
- 2019-08-02 CN CN201921244812.5U patent/CN210041672U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285627A (en) * | 2021-04-12 | 2021-08-20 | 中科石金(安徽)中子技术有限公司 | Pulse power supply system and neutron generator |
| CN113285627B (en) * | 2021-04-12 | 2022-03-15 | 中科石金(安徽)中子技术有限公司 | Pulse power supply system and neutron generator |
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