CN216134463U - Pulse signal generating circuit - Google Patents
Pulse signal generating circuit Download PDFInfo
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- CN216134463U CN216134463U CN202121918462.3U CN202121918462U CN216134463U CN 216134463 U CN216134463 U CN 216134463U CN 202121918462 U CN202121918462 U CN 202121918462U CN 216134463 U CN216134463 U CN 216134463U
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Abstract
The utility model discloses a pulse signal generating circuit, which comprises a control module, an amplitude adjusting module, a rectifying module, a pulse width adjusting module and a charging and discharging module, wherein the amplitude adjusting module is used for adjusting the amplitude of a pulse signal; the charging and discharging module comprises a first charging and discharging unit and a second charging and discharging unit; the pulse width adjusting module comprises a first switch unit and a second switch unit; the input end of the amplitude adjusting module is connected with the output end of the control module; the first control end is connected to the control module, and the second control end is connected to the control module; one end of the first charging and discharging unit is connected with the output end of the rectifying module. The utility model discloses a type control module and amplitude regulation module come the amplitude of control output's pulse signal, recycle the first switch unit of control module control second switch unit and switch on alternately for the pulse width adjustable pulse signal is exported to the second charge-discharge unit, finally reaches the purpose that changes the amplitude and the pulse width of the pulse signal of output in a flexible way, has the characteristics of circuit structure is simple. Can be widely applied to the technical field of electronic circuits.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to a pulse signal generating circuit.
Background
The high-voltage pulse generating circuit has the characteristic of intermittent power supply, and is widely applied to the fields of food processing and sterilization.
The traditional high-voltage pulse generating circuit is characterized in that an LC resonance circuit is formed by an energy storage capacitor, a pulse transformer, a high-voltage coupling capacitor and an electric field equivalent capacitor, voltage pulses are generated by conducting an IGBT electronic switch control circuit, and the traditional high-voltage pulse generating circuit has the defects of complex pulse width control circuit, unstable pulse amplitude and difficulty in adjustment.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one technical problem existing in the prior art to a certain extent, the utility model aims to: a pulse signal generating circuit and a control method are provided.
The technical scheme adopted by the utility model is as follows:
a pulse signal generating circuit comprises a control module, an amplitude adjusting module, a rectifying module, a pulse width adjusting module and a charging and discharging module;
the charging and discharging module comprises a first charging and discharging unit and a second charging and discharging unit; the pulse width adjusting module comprises a first switch unit and a second switch unit, the first switch unit comprises a first end, a second end and a first control end, and the second switch unit comprises a third end, a fourth end and a second control end;
the input end of the amplitude adjusting module is connected with the output end of the control module, and the output end of the amplitude adjusting module is connected with the input end of the rectifying module;
the first control end is connected to the control module, and the second control end is connected to the control module;
one end of the first charge and discharge unit is connected with the output end of the rectifying module, one end of the first charge and discharge unit is connected with the first end, the second end is connected with one end of the second charge and discharge unit, one end of the second charge and discharge unit is connected with the third end, the fourth end is connected to the ground, the other end of the first charge and discharge unit is connected to the ground, and the other end of the second charge and discharge unit is connected to the ground.
Furthermore, the pulse signal generating circuit also comprises a direct current signal generating module, and the direct current signal generating module comprises a rectifying unit and a filtering unit;
the input end of the rectifying unit is connected to an alternating current power supply, the output end of the rectifying unit is connected with the input end of the filtering unit, and the output end of the filtering unit is connected with the input end of the amplitude adjusting module.
Further, the filtering unit includes a pi-type LC filter.
Further, the amplitude adjustment module comprises an IGBT half-bridge inverter circuit.
Furthermore, the amplitude adjusting module further comprises a transformer, the primary side of the transformer is connected with the output end of the IGBT half-bridge inverter circuit, and the secondary side of the transformer is connected with the input end of the rectifying module.
Furthermore, the pulse signal generating circuit also comprises a display module, and the input end of the display module is connected with the output end of the control module.
Further, the first switching unit includes a first thyristor, and the second switching unit includes a second thyristor.
The utility model has the beneficial effects that: the control module and the amplitude adjusting module are used for controlling the amplitude of the output pulse signal, the control module is used for controlling the first switch unit and the second switch unit to be alternately conducted, so that the second charging and discharging unit outputs the pulse signal with adjustable pulse width, and finally the purpose of flexibly changing the amplitude and the pulse width of the output pulse signal is achieved.
Drawings
FIG. 1 is a block diagram of a pulse signal generating circuit of the present invention;
FIG. 2 is a circuit schematic of the pulse signal generating circuit of the present invention;
FIG. 3 is a waveform diagram of a first control signal of the present invention;
fig. 4 is a waveform diagram of a second control signal of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, the present embodiment provides a pulse signal generating circuit, which includes a control module, an amplitude adjusting module 2, a rectifying module 3, a pulse width adjusting module, and a charging and discharging module;
the charge and discharge module includes a first charge and discharge unit 41 and a second charge and discharge unit 42; the pulse width adjusting module comprises a first switch unit 51 and a second switch unit 52, the first switch unit 51 comprises a first end, a second end and a first control end, and the second switch unit 52 comprises a third end, a fourth end and a second control end;
the input end of the amplitude adjusting module 2 is connected with the output end of the control module, and the output end of the amplitude adjusting module 2 is connected with the input end of the rectifying module 3;
the first control end is connected to the control module, and the second control end is connected to the control module;
one end of the first charge and discharge unit 41 is connected to the output end of the rectifier module 3, one end of the first charge and discharge unit 41 is further connected to the first end, the second end is connected to one end of the second charge and discharge unit 42, one end of the second charge and discharge unit 42 is further connected to the third end, the fourth end is connected to the ground GND, the other end of the first charge and discharge unit 41 is connected to the ground GND, and the other end of the second charge and discharge unit 42 is connected to the ground GND.
The application provides a pulse signal generating circuit which is used for generating a pulse signal with adjustable amplitude and pulse width.
The control module is used for generating a control signal to control the amplitude adjusting module 2 and the pulse width adjusting module. The control module can adopt a singlechip, a microcontroller and the like in the prior art.
The input end of the amplitude adjusting module 2 is connected with direct current, the amplitude adjusting module 2 inverts the input direct current into alternating current according to a first control signal output by the control module, and the amplitude of the generated alternating current can be controlled by the first control signal in the process of inverting the direct current into the alternating current.
And the rectifying module 3 is used for rectifying the alternating current output by the amplitude adjusting module 2 to obtain high-voltage direct current. Referring to fig. 2, in a specific embodiment, the rectifying module 3 may include a bridge rectifier circuit BD2 composed of four diodes, and the bridge rectifier circuit BD2 has the characteristics of high rectifying efficiency and low circuit cost.
Referring to fig. 2, the charging and discharging module includes a first charging and discharging unit 41 and a second charging and discharging unit 42, the pulse width adjusting module includes a first switch unit 51 and a second switch unit 52, the first charging and discharging unit 41 includes a plurality of energy storage capacitors, and the second charging and discharging unit 42 includes a plurality of energy storage capacitors.
The first switch unit 51 is configured to control whether the first charge/discharge unit 41 charges the second charge/discharge unit 42, the high-voltage direct current (DC1200V) output by the rectifier module 3 charges the first charge/discharge unit 41, and when the first switch unit 51 is closed, the first charge/discharge unit 41 charges the second charge/discharge unit 42, and the second charge/discharge unit 42 may store electric energy; if the first switch unit 51 is turned off, the first charge/discharge unit 41 cannot charge the second charge/discharge unit 42.
The second switching unit 52 is configured to control whether the second charging and discharging unit 42 discharges to the load, when the second switching unit 52 is turned on, the second charging and discharging unit 42 storing the electric quantity discharges to the load, and if the second switching unit 52 is turned off, the second charging and discharging unit 42 cannot discharge to the load, and the second charging and discharging unit 42 is controlled to discharge intermittently by controlling the second switching unit 52 to be turned on intermittently, that is, the second charging and discharging unit 42 outputs a pulse signal with an adjustable pulse width. In a specific embodiment, referring to fig. 4, the control module generates a second control signal, that is, a PWM signal, for controlling the first charge and discharge unit 41 and the second charge and discharge unit 42, in the first half period, the first switch unit 51 receives a high level signal, the second switch unit 52 receives a low level signal, the first switch unit 51 is closed, the second switch unit 52 is opened, and at this time, the first charge and discharge unit 41 charges the second charge and discharge unit 42, and no current flows through the load due to the open second switch unit 52; in the next half period, the first switch unit 51 receives a low level signal, the second switch unit 52 receives a high level signal, the first switch unit 51 is turned off, the first charge/discharge unit 41 cannot charge the second charge/discharge unit 42, the second switch unit 52 is turned on, and the charged second charge/discharge unit 42 discharges to the load. In the same way, in the following period, the second charging and discharging unit 42 is first charged, and then the second charging and discharging unit 42 is controlled to discharge, and the cycle is repeated, so that the second charging and discharging unit 42 outputs the pulse signal with the adjustable pulse width.
To sum up, the amplitude of the output pulse signal is controlled by the control module and the amplitude adjusting module 2, and then the control module controls the first switch unit 51 and the second switch unit 52 to be alternately switched on, so that the second charging and discharging unit 42 outputs the pulse signal with adjustable pulse width, and finally the purpose of flexibly changing the amplitude and the pulse width of the output pulse signal is achieved.
As a further alternative implementation, referring to fig. 1 and 2, the pulse signal generating circuit further includes a direct current signal generating module, where the direct current signal generating module includes a rectifying unit 11 and a filtering unit 12;
the input end of the rectifying unit 11 is connected to an alternating current power supply, the output end of the rectifying unit 11 is connected with the input end of the filtering unit 12, and the output end of the filtering unit 12 is connected with the input end of the amplitude adjusting module 2.
Specifically, in one embodiment, the direct current input to the amplitude adjustment module 2 may be generated by a direct current signal generation module. Referring to fig. 2, the DC signal generating module includes a rectifying unit 11 and a filtering unit 12, the rectifying unit 11 is configured to rectify an AC power input from an AC power source (AC220V) to obtain a DC power (DC311V), and in a specific embodiment, the rectifying unit 11 may include a bridge rectifier circuit BD1 composed of four diodes, and the bridge rectifier circuit BD1 has a high rectifying efficiency and a low circuit cost.
And the filtering unit 12 is configured to perform filtering processing on the pulse direct current output by the rectifying unit 11 to obtain relatively smooth direct current. In a specific embodiment, the filtering unit 12 may adopt a pi-type LC filter composed of a first capacitor C1, a second capacitor C2 and a first inductor L1.
Further as an alternative embodiment, the amplitude adjustment module 2 comprises an IGBT half-bridge inverter circuit.
Specifically, referring to fig. 2, the IGBT half-bridge inverter circuit includes a third capacitor C3, a fourth capacitor C4, a first IGBT VT1, and a second IGBT VT 2.
In this embodiment, referring to fig. 3, the IGBT half-bridge inverter circuit is configured to invert an input ac power into an ac power with a variable amplitude according to a first control signal of the control module, where the first control signal is an SPWM signal.
When the first IGBT VT1 is conducted, the third capacitor C3 is discharged, and when the second IGBT VT2 is conducted, the fourth capacitor C4 is discharged, and the first IGBT VT1 and the second IGBT VT2 are conducted in turn, so that alternating current is obtained at the output end of the IGBT half-bridge inverter circuit. The control module adjusts the amplitude of the alternating current output by the IGBT half-bridge inverter circuit by controlling the output SPWM signal.
Further as an alternative implementation, referring to fig. 2, the amplitude adjusting module 2 further includes a transformer T1, a primary side of the transformer T1 is connected to the output terminal of the IGBT half-bridge inverter circuit, and a secondary side of the transformer T1 is connected to the input terminal of the rectifying module 3.
Specifically, the matching of the IGBT half-bridge inverter circuit in the control module and the amplitude adjustment module 2 can make the amplitude of the obtained ac variable, and in order to make the rectifier module 3 output high-voltage dc, the ac output from the IGBT half-bridge inverter circuit needs to be boosted, therefore, a transformer T1 is additionally provided in the amplitude adjustment module 2, and the transformer T1 is used to boost the ac obtained by inverting the IGBT half-bridge inverter circuit, so as to obtain high-voltage ac, and the high-voltage ac enters the rectifier module 3 for rectification, so as to obtain high-voltage dc.
As a further alternative, referring to fig. 1, the pulse signal generating circuit further includes a display module, and an input end of the display module is connected to an output end of the control module.
Specifically, the display module is further arranged, and the control module controls the display module to display the oscillogram of the first control signal and the second control signal output by the display module in real time.
Further as an alternative embodiment, referring to fig. 2, the first switching unit 51 includes a first thyristor Q1, and the second switching unit 52 includes a second thyristor Q2.
Specifically, in the present embodiment, a thyristor is used as an implementation manner of the first switch unit 51 and the second switch unit 52, and it is mainly considered that the thyristor has a characteristic of high voltage resistance as a high-power switch tube, and can bear input high-voltage direct current.
The working principle of the utility model is as follows:
after the system is powered on, the alternating current output by the alternating current power supply is input into the direct current signal generating module, the direct current signal generating module rectifies and filters the alternating current input by the alternating current power supply (the rectifying unit 11 and the filtering unit 12) to obtain direct current (DC311V), and the direct current enters the amplitude adjusting module 2, wherein the control module outputs a first control signal (SPWM signal) to control a first IGBT VT1 and a second IGBT VT2 of an IGBT half-bridge inverter circuit to output alternating current with adjustable amplitude, the alternating current is subjected to voltage boosting processing by a transformer T1 and then is rectified by the rectifying module 3 to output high-voltage direct current (DC1200V) at the output end of the rectifying module 3, the high-voltage direct current is used for charging the first charging and discharging unit 41, and the control module outputs a second control signal (PWM signal) to control the first switching unit 51 and the second switching unit 52 to be alternately conducted, therefore, the second charging and discharging unit 42 discharges after being charged, and finally outputs a pulse signal with adjustable pulse width.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (7)
1. A pulse signal generating circuit is characterized by comprising a control module, an amplitude adjusting module, a rectifying module, a pulse width adjusting module and a charging and discharging module;
the charging and discharging module comprises a first charging and discharging unit and a second charging and discharging unit; the pulse width adjusting module comprises a first switch unit and a second switch unit, the first switch unit comprises a first end, a second end and a first control end, and the second switch unit comprises a third end, a fourth end and a second control end;
the input end of the amplitude adjusting module is connected with the output end of the control module, and the output end of the amplitude adjusting module is connected with the input end of the rectifying module;
the first control end is connected to the control module, and the second control end is connected to the control module;
one end of the first charge and discharge unit is connected with the output end of the rectifying module, one end of the first charge and discharge unit is connected with the first end, the second end is connected with one end of the second charge and discharge unit, one end of the second charge and discharge unit is connected with the third end, the fourth end is connected to the ground, the other end of the first charge and discharge unit is connected to the ground, and the other end of the second charge and discharge unit is connected to the ground.
2. The pulse signal generating circuit according to claim 1, further comprising a dc signal generating module, wherein the dc signal generating module comprises a rectifying unit and a filtering unit;
the input end of the rectifying unit is connected to an alternating current power supply, the output end of the rectifying unit is connected with the input end of the filtering unit, and the output end of the filtering unit is connected with the input end of the amplitude adjusting module.
3. The pulse signal generating circuit according to claim 2, wherein the filter unit includes a pi-type LC filter.
4. The pulse signal generating circuit as claimed in claim 1, wherein the amplitude adjusting module comprises an IGBT half-bridge inverter circuit.
5. The pulse signal generating circuit according to claim 4, wherein the amplitude adjusting module further comprises a transformer, a primary side of the transformer is connected to the output terminal of the IGBT half-bridge inverter circuit, and a secondary side of the transformer is connected to the input terminal of the rectifying module.
6. The pulse signal generating circuit according to any one of claims 1 to 5, further comprising a display module, wherein an input terminal of the display module is connected to an output terminal of the control module.
7. The pulse signal generating circuit according to any one of claims 1 to 5, wherein the first switching unit comprises a first thyristor, and the second switching unit comprises a second thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121918462.3U CN216134463U (en) | 2021-08-16 | 2021-08-16 | Pulse signal generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121918462.3U CN216134463U (en) | 2021-08-16 | 2021-08-16 | Pulse signal generating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216134463U true CN216134463U (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121918462.3U Active CN216134463U (en) | 2021-08-16 | 2021-08-16 | Pulse signal generating circuit |
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| CN (1) | CN216134463U (en) |
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2021
- 2021-08-16 CN CN202121918462.3U patent/CN216134463U/en active Active
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