CN215897613U - High-voltage switch pulse power supply - Google Patents
High-voltage switch pulse power supply Download PDFInfo
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- CN215897613U CN215897613U CN202121397709.1U CN202121397709U CN215897613U CN 215897613 U CN215897613 U CN 215897613U CN 202121397709 U CN202121397709 U CN 202121397709U CN 215897613 U CN215897613 U CN 215897613U
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Abstract
The utility model provides a high-voltage switch pulse power supply, wherein a series resonant circuit consisting of a filter resonant capacitor bank, a high-voltage switch module, a high-voltage resonant capacitor, a high-voltage resonant inductor and a high-voltage coupling inductance circuit is arranged on the high-voltage side of a main circuit of the power supply; the main circuit also comprises a three-phase silicon controlled rectifier boosting and rectifying circuit, a current limiting inductor, a current transformer, a direct-current high-voltage divider, a signal processing and amplifying circuit and a control circuit. The high-voltage switch is adopted in the application, so that the high-voltage and low-current switching-on and switching-off are realized, and the heating and current impact caused by the high-current switching-on and switching-off are avoided; the pulse transformer is removed, the circuit is simplified, and the influence of secondary interference on the primary circuit is avoided; a group of three-phase fully-controlled rectifying circuits is adopted to achieve the purpose of flexibly adjusting the pulse charging voltage and the pulse peak voltage in real time.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of power supplies, in particular to a high-voltage switch pulse power supply.
[ background of the utility model ]
The circuit principle of the pulse power supply for the existing electric dust remover mainly comprises the following steps: firstly, through the boost circuit, a DC voltage of 2000-2500V is formed for charging the energy storage capacitor. One end of the energy storage capacitor is connected to the low-voltage power switch device to the ground, and the other end of the energy storage capacitor is connected to the primary end of the pulse transformer. The secondary end of the pulse transformer is connected with the high-voltage coupling capacitor and the cathode wire of the electric dust collector and is grounded through the anode plate to form a loop. When the low-voltage power switch is closed, the energy storage capacitor, the leakage inductance of the pulse transformer, the high-voltage coupling capacitor and the equivalent capacitor of the dust remover form series resonance, and the resonance current forms pulse voltage on the dust remover to realize the function of a pulse power supply.
The existing pulse power supply of the dust remover comprises a pulse transformer which converts low-voltage large current into high-voltage small current. The main switching device is arranged on the primary side of the pulse transformer, and the secondary side of the pulse transformer is not provided with the switching device. The parameters of the switching device are mainly power switching devices with the rated voltage of 3300V or 1700V, and the rated current is 1000A or more. Because the peak value of the primary side current of the pulse power supply is huge, when the dust remover has flashover, even the peak value may exceed 10kA, the fault rate of the switching device is high, and the stability of the equipment is poor.
Meanwhile, because the secondary side is not provided with a switch device, when the dust remover has flashover, the secondary side can form a resonant circuit, and the impulse current is induced to the primary side through the pulse transformer, so that the components on the primary side are greatly damaged, and the stability of the device is influenced.
[ Utility model ] content
The utility model aims to solve the problems in the prior art and provides a high-voltage switch pulse power supply which can realize zero-current and near-zero voltage turn-off, reduce switching loss and protect a switching device.
In order to achieve the purpose, the utility model provides a high-voltage switch pulse power supply, wherein a series resonant circuit consisting of a filter resonant capacitor bank, a high-voltage switch module, a high-voltage resonant capacitor, a high-voltage resonant inductor and a high-voltage coupling inductance circuit is arranged on the high-voltage side of a main circuit of the power supply; the main circuit also comprises a three-phase silicon controlled rectifier boosting and rectifying circuit, a current limiting inductor, a current transformer, a direct-current high-voltage divider, a signal processing and amplifying circuit and a control circuit; the three-phase silicon controlled rectifier boost rectifying circuit comprises a three-phase input reactor, three groups of anti-parallel silicon controlled rectifiers, a three-phase delta/Y boost transformer and a three-phase rectifier bridge, wherein the silicon controlled rectifiers, the three-phase delta/Y boost transformer, the three-phase rectifier bridge and the current-limiting inductor form stable direct-current high voltage on the filter resonance capacitor group, and the direct-current voltage of the filter resonance capacitor group is adjusted by controlling the conduction angle of the silicon controlled rectifier; the control circuit comprises a power supply controller, a silicon controlled drive circuit, a high-voltage switch drive circuit, a voltage and current sampling and filtering conditioning circuit, a pulse peak value sampling and filtering circuit and a temperature gas signal sampling circuit; the direct-current voltage sampling value is obtained by a direct-current high-voltage divider, and is sent to the power supply controller after being processed by the signal processing and amplifying circuit; the pulse peak voltage is obtained by a direct-current high-voltage divider and is sent to the power supply controller through a pulse peak sampling filter circuit; the resonance current is obtained by the current transformer and is sent to the power supply controller after being processed by the signal processing and amplifying circuit; temperature and gas signals are collected by a temperature gas signal sampling circuit and are sent to a power supply controller; the silicon controlled rectifier trigger signal output by the power supply controller is processed by the signal processing and amplifying circuit and then drives the three-phase rectifier bridge to realize the control of direct-current voltage; and the high-voltage switch trigger signal output by the power supply controller is processed by the signal processing and amplifying circuit to drive the high-voltage switch module.
Preferably, the filter resonance capacitor bank is formed by connecting a plurality of thin film capacitors in series and then connecting the thin film capacitors in parallel.
Preferably, each parallel capacitor group of the filter resonance capacitor group is connected with a non-inductive resistor in parallel, so that the voltage division uniformity of the series capacitors is ensured.
Preferably, the high-voltage switch module is formed by combining a plurality of small IGBT switches in a series-parallel connection mode.
Preferably, the high-voltage coupling inductance-resistance circuit comprises an inductor and a dust remover equivalent capacitor.
Preferably, the three-phase thyristor boost and rectification circuit further comprises a breaker and a contactor.
Preferably, the main circuit further comprises an RD protection circuit, a spark impact absorption RCD circuit, and a pulse voltage capacitance divider.
The utility model has the beneficial effects that: the utility model adopts a high-voltage switch mode to realize the on-off of high voltage and low current, and avoids the heating and current impact caused by the on-off of high current; the pulse transformer is removed, the circuit is simplified, and the influence of secondary interference on the primary circuit is avoided; a group of three-phase fully-controlled rectifying circuits is adopted to achieve the purpose of flexibly adjusting the pulse charging voltage and the pulse peak voltage in real time.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a main circuit diagram of a high-voltage switching pulse power supply of the utility model.
[ detailed description ] embodiments
Referring to fig. 1, the high-voltage side of the main circuit of the high-voltage switching pulse power supply of the utility model is provided with a series resonant circuit consisting of a filter resonant capacitor group 3, a high-voltage switching module 6 (an IGBT high-voltage switch), a high-voltage resonant capacitor 7, a high-voltage resonant inductor 8 and a high-voltage coupling inductance-resistance circuit 9; the main circuit also comprises a three-phase silicon controlled boost rectifying circuit 1, a current limiting inductor 2, a current transformer 4, a direct-current high-voltage divider 5, a signal processing amplifying circuit 11 and a control circuit;
the three-phase silicon controlled rectifier boost rectifying circuit 1 comprises a three-phase input reactor, three groups of anti-parallel silicon controlled rectifiers, a three-phase delta/Y boost transformer and a three-phase rectifier bridge, wherein the silicon controlled rectifiers, the three-phase delta/Y boost transformer, the three-phase rectifier bridge and the current limiting inductor 2 form stable direct current high voltage-Udc (negative voltage) on the filter resonance capacitor bank 3, and the direct current voltage of the filter resonance capacitor bank 3 is adjusted by controlling the conduction angle of the silicon controlled rectifiers;
the control circuit comprises a power controller 12, a silicon controlled drive circuit, a high-voltage switch drive circuit, a voltage and current sampling filter conditioning circuit, a pulse peak value sampling filter circuit and a temperature gas signal sampling circuit; the DC voltage sampling value is obtained by a DC high-voltage divider 5, processed by a signal processing and amplifying circuit 11 and then sent to a power controller 12; the pulse peak voltage is obtained by the direct-current high-voltage divider 5 and is sent to the power controller 12 through the pulse peak sampling filter circuit; the resonance current is obtained by the current transformer 4, processed by the signal processing and amplifying circuit 11 and then sent to the power controller 12; the temperature and gas signals are collected by a temperature gas signal sampling circuit and are sent to the power controller 12;
the silicon controlled trigger signal output by the power controller 12 is processed by the signal processing and amplifying circuit 11 and then drives the three-phase rectifier bridge to realize the control of direct current voltage-Udc (negative voltage); the high-voltage switch trigger signal output by the power controller 12 is processed by the signal processing and amplifying circuit 11 to drive the high-voltage switch module 6. The trigger signal is a series of PWM square waves, and the high level width of the square waves represents the on time of the high-voltage switch within one period, which is typically 3/4 × the series resonance period. The frequency of the PWM wave represents the frequency of the pulses, i.e., the number of pulses per second, and is typically 1-1000/second.
Furthermore, the filter resonance capacitor group 3 is formed by connecting a plurality of thin film capacitors in series and then connecting the thin film capacitors in parallel, and each parallel capacitor group of the filter resonance capacitor group 3 is connected with a non-inductive resistor in parallel, so that the voltage division uniformity of the series capacitors is ensured.
Further, the high-voltage switch module 6 is formed by combining a plurality of small IGBT switches in series-parallel connection, and realizes a withstand voltage of 140kV, a rated current effective value of 10A, and a rated ac peak withstand current of 300A100 us.
Further, the high-voltage coupling inductance-resistance circuit 9 comprises an inductor and a dust remover equivalent capacitor.
Further, the three-phase silicon controlled boost rectifying circuit 1 further comprises a circuit breaker and a contactor.
Further, the main circuit further comprises an RD protection circuit, a spark impact absorption RCD circuit and a pulse voltage capacitance divider 10.
The working process of the utility model is as follows:
the electric energy is initially stored in the filter resonance capacitor set 3 and is represented as direct current voltage, and the initial voltage and current of the rest capacitors and the inductor are zero. When the high-voltage switch is turned on, the current flows out from the positive voltage terminal of the filter resonance capacitor bank 3 under negative pressure, the positive terminal is a grounding terminal, and the current returns to the negative voltage terminal of the filter resonance capacitor bank 3 through the grounding network, the inductor in the dust remover and the high-voltage coupling inductance-resistance circuit 9, the high-voltage resonance inductor 8, the high-voltage resonance capacitor 7 and the turned-on high-voltage switch module 6 in sequence. The resonant current increases and then decreases, and when the decrease is zero, it takes half a resonant period. When the resonant current reduces zero crossing and changes into reverse direction, the current path is opposite to the previous half period and flows through the parallel diode when passing through the high-voltage switch module 6, so that the high-voltage switch module 6 is conveniently switched off in the period, the zero-current and near-zero voltage switching-off is realized, the switching loss is reduced, and the switching device is protected. Period of resonance is determined by the formula
Is calculated, wherein LGeneral assemblyIs the total inductance of the resonant tank, CGeneral assemblyIs the total capacitance of the resonant tank. The period T is controlled to be between 60 and 120 microseconds.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (7)
1. A high-voltage switch pulse power supply is characterized in that: a series resonance circuit consisting of a filter resonance capacitor group (3), a high-voltage switch module (6), a high-voltage resonance capacitor (7), a high-voltage resonance inductor (8) and a high-voltage coupling inductance-resistance circuit (9) is arranged on the high-voltage side of the main circuit of the power supply; the main circuit also comprises a three-phase silicon controlled boost rectifying circuit (1), a current limiting inductor (2), a current transformer (4), a direct-current high-voltage divider (5), a signal processing amplifying circuit (11) and a control circuit;
the three-phase silicon controlled rectifier boosting and rectifying circuit (1) comprises a three-phase input reactor, three groups of silicon controlled rectifiers which are connected in an anti-parallel mode, a three-phase delta/Y boosting transformer and a three-phase rectifying bridge, wherein the silicon controlled rectifiers, the three-phase delta/Y boosting transformer, the three-phase rectifying bridge and a current-limiting inductor (2) form stable direct-current high voltage on a filter resonance capacitor group (3), and the direct-current voltage of the filter resonance capacitor group (3) is adjusted by controlling the conduction angle of the silicon controlled rectifiers;
the control circuit comprises a power supply controller (12), a silicon controlled drive circuit, a high-voltage switch drive circuit, a voltage and current sampling filter conditioning circuit, a pulse peak value sampling filter circuit and a temperature gas signal sampling circuit; the direct-current voltage sampling value is obtained by a direct-current high-voltage divider (5), processed by a signal processing and amplifying circuit (11) and then sent to a power supply controller (12); the pulse peak voltage is obtained by a direct current high voltage divider (5) and is sent to a power supply controller (12) through a pulse peak sampling filter circuit; the resonance current is obtained by a current transformer (4), is processed by a signal processing and amplifying circuit (11) and then is sent to a power supply controller (12); temperature and gas signals are collected by a temperature gas signal sampling circuit and are sent to a power supply controller (12);
the silicon controlled trigger signal output by the power controller (12) is processed by the signal processing and amplifying circuit (11) and then drives the three-phase rectifier bridge to realize the control of direct-current voltage; the high-voltage switch trigger signal output by the power controller (12) is processed by the signal processing and amplifying circuit (11) and then drives the high-voltage switch module (6).
2. A high voltage switched pulse power supply as claimed in claim 1, wherein: the filter resonance capacitor group (3) is formed by connecting a plurality of thin film capacitors in series and then in parallel.
3. A high voltage switched pulse power supply as claimed in claim 2, wherein: each parallel capacitor group of the filter resonance capacitor group (3) is connected with a non-inductive resistor in parallel, so that the voltage division uniformity of the series capacitors is ensured.
4. A high voltage switched pulse power supply as claimed in claim 1, wherein: the high-voltage switch module (6) is formed by combining a plurality of IGBT switches in a series-parallel connection mode.
5. A high voltage switched pulse power supply as claimed in claim 1, wherein: the high-voltage coupling inductance-resistance circuit (9) comprises an inductor and a dust remover equivalent capacitor.
6. A high voltage switched pulse power supply as claimed in claim 1, wherein: the three-phase silicon controlled boost rectifying circuit (1) further comprises a circuit breaker and a contactor.
7. A high voltage switched pulse power supply as claimed in claim 1, wherein: the main circuit also comprises an RD protection circuit, a spark impact absorption RCD circuit and a pulse voltage capacitance divider (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121397709.1U CN215897613U (en) | 2021-06-23 | 2021-06-23 | High-voltage switch pulse power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121397709.1U CN215897613U (en) | 2021-06-23 | 2021-06-23 | High-voltage switch pulse power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897613U true CN215897613U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121397709.1U Active CN215897613U (en) | 2021-06-23 | 2021-06-23 | High-voltage switch pulse power supply |
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| Country | Link |
|---|---|
| CN (1) | CN215897613U (en) |
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2021
- 2021-06-23 CN CN202121397709.1U patent/CN215897613U/en active Active
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