CN203800906U - Nanosecond square wave generator - Google Patents
Nanosecond square wave generator Download PDFInfo
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- CN203800906U CN203800906U CN201420207867.XU CN201420207867U CN203800906U CN 203800906 U CN203800906 U CN 203800906U CN 201420207867 U CN201420207867 U CN 201420207867U CN 203800906 U CN203800906 U CN 203800906U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 63
- 230000002457 bidirectional effect Effects 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000006837 decompression Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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Abstract
The utility model discloses a nanosecond square wave generator, comprising a power supply circuit, a square wave conversion circuit and low voltage square wave generation circuit. The power supply circuit comprises an output connected to the input terminal of the low voltage square generation circuit and an output connected to the input terminal of the square wave conversion circuit; and the output terminal of the square wave generation circuit is connected to the other input terminal of the square wave conversion circuit. The square wave generator can produce square wave signals voltage of which is 1000V and ascension time of which reaches ns level.
Description
Technical field:
The utility model relates to a kind of square-wave generator, and being specifically related to a kind of voltage is the nanosecond square-wave generator of 1000V.
Background technology:
In electric power system, due to thunderbolt or switching manipulation, occur that sometimes the wave head time is than standard lightning wave 1.2 μ s short impulse overvoltage also, this class Overvoltage Amplitude is high, the rise time is short, can arrive ns level, harm to system safety operation is large, therefore need to carry out Measurement accuracy and further investigation to superpotential amplitude, frequency characteristic etc., for understanding and dealing with problems;
The square-wave generator of studying for impact overvoltage at present, its rise time is difficult to reach ns level, and square-wave voltage only has tens volts, and voltage is too low can affect measurement result, can not meet the superpotential research of impact.
Utility model content:
The object of the present invention is to provide a kind of voltage is the nanosecond square-wave generator of 1000V, low pressure square wave circuit for generating by adjustable duty ratio and frequency is controlled the high speed-sensitive switch of withstand voltage, thereby produce the high-voltage nanosecond square wave that the wave head rise time can reach ns level, thereby for generating, transmission of electricity, instrument and meter being measured to performance study and the design of test and electric power system electric equipment.
Technical scheme provided by the invention is: a kind of nanosecond square-wave generator, and its improvements are:
Described square-wave generator comprises power circuit, square wave conversion circuit and and low pressure square wave circuit for generating;
Described power circuit comprises the output being connected with the input of described low pressure square wave circuit for generating and the output being connected with the input of described square wave conversion circuit, and the output of described square wave circuit for generating is connected with another input of described square wave conversion circuit.
Preferably, described power circuit comprises isolating transformer BT1, isolating transformer BT2, voltage doubling rectifing circuit and current rectifying and wave filtering circuit; Winding of described isolating transformer BT1 and a winding parallel of described isolation transformation BT2, the input that winding two ends of described isolating transformer BT1 are 220V alternating voltage; The secondary winding of described isolating transformer BT1 is in parallel with the input of described voltage doubling rectifing circuit, and the secondary winding of described isolating transformer BT2 is in parallel with the input of described current rectifying and wave filtering circuit.
Further, described voltage doubling rectifing circuit comprises capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6;
One end of described isolating transformer BT1 secondary winding is connected with one end of described capacitor C 1, and the other end is connected with the anode of described diode D1 and one end of described capacitor C 4 respectively; The other end of described capacitor C 1 is connected with one end of the negative electrode of described diode D1, the anode of described diode D2 and described capacitor C 2 respectively; The other end of described capacitor C 2 is connected with one end of the negative electrode of described diode D3, the anode of described diode D4 and described capacitor C 3 respectively; The other end of described capacitor C 3 respectively with the negative electrode of described diode D5 and the anodic bonding of described diode D6; The other end of described capacitor C 4 is connected with one end of the negative electrode of described diode D2, the anode of described diode D3 and described capacitor C 5 respectively; The other end of described capacitor C 5 is connected with one end of the negative electrode of described diode D4, the anode of described diode D5 and described capacitor C 6 respectively; The other end of described capacitor C 6 is connected with negative electrode and the ground of described diode D6 respectively; The two ends of described diode D6 are the output of described voltage doubling rectifing circuit.
Further, described current rectifying and wave filtering circuit comprises diode D7 and capacitor C 7, the anodic bonding of one end of the secondary winding of described isolating transformer BT2 and described diode D7, and the other end is connected with one end and the ground of described capacitor C 7 respectively; The other end of described capacitor C 7 is connected with the negative electrode of described diode D7; The two ends of described capacitor C 7 are the output of described current rectifying and wave filtering circuit.
Preferably, described low pressure square wave circuit for generating comprises N555 chip, resistance R 9, resistance R 10, slide rheostat RP1, diode D8, diode D9, capacitor C 8, capacitor C 9;
Described resistance R 9, described slide rheostat RP1, described resistance R 10 connect successively, and the other end of described resistance R 9 is connected with pin 4 with the signal output part of described current rectifying and wave filtering circuit, the pin 8 of described N555 chip respectively; The other end of described resistance R 10 is connected with the negative electrode of described diode D8, and the anode of described diode D8 is connected with the negative electrode of pin 6, described diode D9 and one end of described capacitor C 8 with the pin 2 of described N555 chip respectively; The other end of described capacitor C 8 respectively with the pin 1 of described N555 chip, one end of described capacitor C 9 and ground be connected; The other end of described capacitor C 9 is connected with the pin 5 of described N555 chip; The anode of described diode D9 is connected with the sliding end of described slide rheostat, the pin 7 of described N555 chip respectively; The pin 3 of described N555 chip is signal output part.
Further, square wave conversion circuit comprises capacitor C, resistance R 0, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, triode V1, triode V2, thyristor V3, bidirectional triode thyristor V4, biphase rectification bridge UR and optical coupler;
Described optical coupler is comprised of light-emitting diode and photistor;
One end of described resistance R 0 and described light-emitting diode anodic bonding, the other end is connected with the pin 3 of described N555 chip, the minus earth of described light-emitting diode; The collector electrode of described photistor is connected with the base stage of described triode V1 with one end of described resistance R 1 respectively, the emitter of described photistor respectively with the emitter of described triode V1, one end of one end of described resistance R 3, described resistance R 5, the DC output end of the negative electrode of the emitter of described triode V2, described thyristor V3 and described biphase rectification bridge UR is anodal is connected; The other end of described resistance R 1 respectively with one end of described resistance R 2, the anode of one end of described resistance R 4, described thyristor V3 be connected with the DC output end negative pole of described biphase rectification bridge UR; The other end of described resistance R 2 respectively with the collector electrode of described triode V1, the collector electrode of the other end of described resistance R 3, described triode V2 and the control utmost point of described thyristor V3 be connected; The other end of described resistance R 4 is connected with the base stage of described triode V2 with the other end of described resistance R 5 respectively; One end of described resistance R 6 is connected with the ac input end of described biphase rectification bridge UR, the other end is connected with one end of described resistance R 8 with the first anode of described bidirectional triode thyristor V4 respectively, the other end of described resistance R 8 is connected with one end of described capacitor C, and the other end of described capacitor C is connected with one end of described resistance R 7 with the second plate of described bidirectional triode thyristor V4 respectively; The other end of described resistance R 7 is connected with another ac input end of described biphase rectification bridge UR and the control utmost point of described bidirectional triode thyristor V4 respectively.
Further, the first anode of described bidirectional triode thyristor V4 is connected with the signal output part of voltage doubling rectifing circuit, the signal output part that the second plate of described bidirectional triode thyristor is described square wave conversion circuit.
The present invention has following beneficial effect:
1) power circuit adopts voltage doubling rectifing circuit and current rectifying and wave filtering circuit, for square wave conversion circuit provides signal conversion source, is also the power supply of low pressure square wave circuit for generating simultaneously;
2) square wave circuit for generating adopts N555 to be designed to the low pressure square-wave signal of adjustable duty ratio and frequency, drives square wave conversion circuit, thereby realized square wave conversion circuit, high-voltage dc signal source is converted to the function of high-voltage nanosecond level square-wave signal;
3) square wave conversion circuit adopts that contactless electronic beam switch solid-state relay is changed, solid-state relay reliable operation, life-span is long, antijamming capability is strong, can be compatible with the logical circuit such as TTL, DTL, HTL, thus reach the object that the small control signal producing with square wave circuit for generating directly drives large current load.
Accompanying drawing explanation:
Fig. 1 is the schematic diagram of nanosecond square-wave generator;
Fig. 2 is the circuit theory diagrams of power circuit in Fig. 1;
Fig. 3 is the circuit theory diagrams of Fig. 1 mesolow square wave circuit for generating;
Fig. 4 is the schematic diagram of square wave conversion circuit in Fig. 1;
Fig. 5 is the internal circuit schematic diagram of square wave conversion circuit in Fig. 4.
Embodiment:
In order better to understand the utility model, below in conjunction with example and accompanying drawing, content of the present utility model is described further:
In Fig. 2, the alternating voltage of 220V is divided into two-way, and a road is through isolating transformer BT1 (1; 1) at the alternating current of a 220V of secondary output after the voltage doubling rectifing circuit that D1～D6 and C1～C6 form, the direct voltage that 220V alternating current is transformed into 1000V provides switching signal source for square wave conversion circuit below, another road becomes the alternating current decompression transformation of 220V through transformer BT2 the alternating voltage of 24V, then the direct voltage square wave circuit for generating that the current rectifying and wave filtering circuit forming through D7 and C7 obtains 12V is powered.
In Fig. 3, with N555 chip, form square wave circuit for generating, circuit needs only one and adds voltage VDD, and oscillator is starting of oscillation just.During just energising, because the voltage on C8 can not suddenly change, the initial level of 2 pin current potentials is end current potential, makes N555 set, and 3 pin are high level.C8 charges to it by R9, D9, when the upper voltage of C8 is charged to threshold level 2/3VDD, N555 resets, 3 pin are transmitted low level, now C8 discharges by the discharge tube of D9, R10, N555 inside, by capacitor C 8 ceaselessly charging and discharging at 3 pin of N555, just export the square-wave signal V0 that continuous voltage is 12V; Regulate RP1 can change frequency and the duty ratio of V0, it is 5HZ that this circuit regulates the frequency of V0 according to demand, control 1 pin in square wave conversion circuit as Fig. 4, in square wave conversion circuit, 1 pin connects control signal, 2 pin ground connection to make control signal can form 1000V DC source, 4 pin that loop, 3 pin connect power circuit is output;
In Fig. 5, with the solid-state relay that withstand voltage is 1000V, form described square wave conversion circuit; Solid-state relay is mainly comprised of input (control) circuit, drive circuit and output (load) circuit three parts, and its input control signal is under the control of the square-wave signal of low pressure square-wave generator, and the break-make that realizes solid-state relay is switched; 1,2 is input, and 3,4 is input, output.R0 is current-limiting resistance; optical coupler is kept apart input and output circuit on electric; V1 forms inverter, and R4, R5, V2 and thyristor V3 form zero cross detection circuit, and UR is biphase rectification bridge; the two-way trigger impulse that in order to acquisition, bidirectional triode thyristor V4 is opened by V3 and UR; R3, R7 are shunt resistance, are used for respectively protecting V3 and V4, and R8 and C form surge absoption network; with absorb in power supply with peak voltage or surge current, prevent switching circuit to produce and impact or disturb.When the voltage signal of V0 output rising adds 1 pin input, the lumination of light emitting diode in optical coupler, photistor is saturated, makes V
1cut-off.When now if V3 both end voltage is within the scope of-(10～25) V or 10～25V, as long as suitably select divider resistance R
4and R
5, just can make V
2cut-off, makes V3 triggering and conducting like this, thereby makes to obtain from R in the control extremely of V4
6→ UR → V3 → UR → R
7or reciprocal trigger impulse, and make V
4conducting, makes 3,4 pin inputs, output conducting; When the voltage signal of V0 output decline adds 1 pin input, the photistor cut-off in optical coupler, V
1saturated, V
3cut-off, but V now
4still keep conducting, until load current with supply voltage be reduced to be less than bidirectional thyristor maintain electric current time 3,4 pin inputs, output just transfer cut-off to.Like this 4 pin outputs and 2 pin just hold and produced a square-wave signal that the voltage magnitude changing with 1 pin input V0 signal intensity is different, the amplitude of this square-wave signal is 1000V, the rise time can reach ns level.
These are only embodiment of the present utility model, be not limited to the utility model, all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the claim scope of the present utility model that application awaits the reply.
Claims (7)
1. a nanosecond square-wave generator, is characterized in that:
Described square-wave generator comprises power circuit, square wave conversion circuit and low pressure square wave circuit for generating;
Described power circuit comprises the output being connected with the input of described low pressure square wave circuit for generating and the output being connected with the input of described square wave conversion circuit, and the output of described square wave circuit for generating is connected with another input of described square wave conversion circuit.
2. a kind of nanosecond square-wave generator as claimed in claim 1, is characterized in that:
Described power circuit comprises isolating transformer BT1, isolating transformer BT2, voltage doubling rectifing circuit and current rectifying and wave filtering circuit; Winding of described isolating transformer BT1 and a winding parallel of described isolation transformation BT2, the input that winding two ends of described isolating transformer BT1 are 220V alternating voltage; The secondary winding of described isolating transformer BT1 is in parallel with the input of described voltage doubling rectifing circuit, and the secondary winding of described isolating transformer BT2 is in parallel with the input of described current rectifying and wave filtering circuit.
3. a kind of nanosecond square-wave generator as claimed in claim 2, is characterized in that:
Described voltage doubling rectifing circuit comprises capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6;
One end of described isolating transformer BT1 secondary winding is connected with one end of described capacitor C 1, and the other end is connected with the anode of described diode D1 and one end of described capacitor C 4 respectively; The other end of described capacitor C 1 is connected with one end of the negative electrode of described diode D1, the anode of described diode D2 and described capacitor C 2 respectively; The other end of described capacitor C 2 is connected with one end of the negative electrode of described diode D3, the anode of described diode D4 and described capacitor C 3 respectively; The other end of described capacitor C 3 respectively with the negative electrode of described diode D5 and the anodic bonding of described diode D6; The other end of described capacitor C 4 is connected with one end of the negative electrode of described diode D2, the anode of described diode D3 and described capacitor C 5 respectively; The other end of described capacitor C 5 is connected with one end of the negative electrode of described diode D4, the anode of described diode D5 and described capacitor C 6 respectively; The other end of described capacitor C 6 is connected with negative electrode and the ground of described diode D6 respectively; The two ends of described diode D6 are the output of described voltage doubling rectifing circuit.
4. a kind of nanosecond square-wave generator as claimed in claim 2, is characterized in that:
Described current rectifying and wave filtering circuit comprises diode D7 and capacitor C 7, the anodic bonding of one end of the secondary winding of described isolating transformer BT2 and described diode D7, and the other end is connected with one end and the ground of described capacitor C 7 respectively; The other end of described capacitor C 7 is connected with the negative electrode of described diode D7; The two ends of described capacitor C 7 are the output of described current rectifying and wave filtering circuit.
5. a kind of nanosecond square-wave generator as claimed in claim 1, is characterized in that:
Described low pressure square wave circuit for generating comprises N555 chip, resistance R 9, resistance R 10, slide rheostat RP1, diode D8, diode D9, capacitor C 8, capacitor C 9;
Described resistance R 9, described slide rheostat RP1, described resistance R 10 connect successively, and the other end of described resistance R 9 is connected with pin 4 with the signal output part of described current rectifying and wave filtering circuit, the pin 8 of described N555 chip respectively; The other end of described resistance R 10 is connected with the negative electrode of described diode D8, and the anode of described diode D8 is connected with the negative electrode of pin 6, described diode D9 and one end of described capacitor C 8 with the pin 2 of described N555 chip respectively; The other end of described capacitor C 8 respectively with the pin 1 of described N555 chip, one end of described capacitor C 9 and ground be connected; The other end of described capacitor C 9 is connected with the pin 5 of described N555 chip; The anode of described diode D9 is connected with the sliding end of described slide rheostat, the pin 7 of described N555 chip respectively; The pin 3 of described N555 chip is signal output part.
6. a kind of nanosecond square-wave generator as claimed in claim 5, is characterized in that:
Square wave conversion circuit comprises capacitor C, resistance R 0, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, triode V1, triode V2, thyristor V3, bidirectional triode thyristor V4, biphase rectification bridge UR and optical coupler;
Described optical coupler is comprised of light-emitting diode and photistor;
One end of described resistance R 0 and described light-emitting diode anodic bonding, the other end is connected with the pin 3 of described N555 chip, the minus earth of described light-emitting diode; The collector electrode of described photistor is connected with the base stage of described triode V1 with one end of described resistance R 1 respectively, the emitter of described photistor respectively with the emitter of described triode V1, one end of one end of described resistance R 3, described resistance R 5, the DC output end of the negative electrode of the emitter of described triode V2, described thyristor V3 and described biphase rectification bridge UR is anodal is connected; The other end of described resistance R 1 respectively with one end of described resistance R 2, the anode of one end of described resistance R 4, described thyristor V3 be connected with the DC output end negative pole of described biphase rectification bridge UR; The other end of described resistance R 2 respectively with the collector electrode of described triode V1, the collector electrode of the other end of described resistance R 3, described triode V2 and the control utmost point of described thyristor V3 be connected; The other end of described resistance R 4 is connected with the base stage of described triode V2 with the other end of described resistance R 5 respectively; One end of described resistance R 6 is connected with the ac input end of described biphase rectification bridge UR, the other end is connected with one end of described resistance R 8 with the first anode of described bidirectional triode thyristor V4 respectively, the other end of described resistance R 8 is connected with one end of described capacitor C, and the other end of described capacitor C is connected with one end of described resistance R 7 with the second plate of described bidirectional triode thyristor V4 respectively; The other end of described resistance R 7 is connected with another ac input end of described biphase rectification bridge UR and the control utmost point of described bidirectional triode thyristor V4 respectively.
7. a kind of nanosecond square-wave generator as claimed in claim 6, is characterized in that:
The first anode of described bidirectional triode thyristor V4 is connected with the signal output part of voltage doubling rectifing circuit, the signal output part that the second plate of described bidirectional triode thyristor is described square wave conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420207867.XU CN203800906U (en) | 2014-04-25 | 2014-04-25 | Nanosecond square wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420207867.XU CN203800906U (en) | 2014-04-25 | 2014-04-25 | Nanosecond square wave generator |
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| Publication Number | Publication Date |
|---|---|
| CN203800906U true CN203800906U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420207867.XU Expired - Lifetime CN203800906U (en) | 2014-04-25 | 2014-04-25 | Nanosecond square wave generator |
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| Country | Link |
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| CN (1) | CN203800906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290910A (en) * | 2020-10-20 | 2021-01-29 | 云南电网有限责任公司临沧供电局 | Voltage-multiplying triangular pulse source circuit for positioning injection fault of distribution transformer low-voltage side pulse |
-
2014
- 2014-04-25 CN CN201420207867.XU patent/CN203800906U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290910A (en) * | 2020-10-20 | 2021-01-29 | 云南电网有限责任公司临沧供电局 | Voltage-multiplying triangular pulse source circuit for positioning injection fault of distribution transformer low-voltage side pulse |
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| CX01 | Expiry of patent term |
Granted publication date: 20140827 |