CN117614425A - Long pulse modulation control device - Google Patents
Long pulse modulation control device Download PDFInfo
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- CN117614425A CN117614425A CN202311569238.1A CN202311569238A CN117614425A CN 117614425 A CN117614425 A CN 117614425A CN 202311569238 A CN202311569238 A CN 202311569238A CN 117614425 A CN117614425 A CN 117614425A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
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- H03K19/017545—Coupling arrangements; Impedance matching circuits
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Abstract
The invention discloses a long pulse modulation control device, which comprises: a main control module and a plurality of H-bridge control modules; the main control module is electrically connected with the H-bridge control modules and is used for simultaneously outputting pulse enabling signals, synchronous clock pulse signals and voltage regulating signals to any one H-bridge control module so as to control the H-bridge control module to output pulse width modulation signals; wherein the pulse width modulated signal comprises a millisecond pulse width modulated signal. By adopting the technical means, the pulse enable signals, the synchronous clock pulse signals and the voltage regulating signals are simultaneously output to the H-bridge control modules through the main control module, so that the H-bridge control modules can be ensured to output millisecond pulse width modulation signals, and the output precision of the modulation device is improved.
Description
Technical Field
The invention relates to the technical field of modulators, in particular to a long pulse modulation control device.
Background
The long pulse high power modulator has important application in the high current proton accelerator, the traditional solid state long pulse modulator is realized by adopting a pulse transformer, long pulse with the millisecond level or more is difficult to obtain, and the modulator of the system is difficult to reach the design target especially under the condition that indexes such as single pulse power level, pulse rising/falling edge time, pulse internal flatness, volume weight and the like are very severe.
Disclosure of Invention
The embodiment of the invention provides a long pulse modulation control device, which is used for improving the output precision of the modulation control device.
The embodiment of the invention provides a long pulse modulation control device, which comprises: a main control module and a plurality of H-bridge control modules;
the main control module is electrically connected with the H-bridge control modules and is used for simultaneously outputting pulse enabling signals, synchronous clock pulse signals and voltage regulating signals to any one of the H-bridge control modules so as to control the H-bridge control modules to output pulse width modulation signals;
wherein the pulse width modulated signal comprises a millisecond pulse width modulated signal.
Optionally, the master control module is further configured to output the pulse enable signal, the synchronous clock pulse signal, and the voltage regulation signal to the plurality of H-bridge control modules in a time-sharing manner.
Optionally, the long pulse modulation control device further includes: a signal conditioning module;
the signal conditioning module is electrically connected with the main control module and is used for receiving the analog voltage signal output by the long pulse modulation control device, isolating and amplifying the analog voltage signal to form a conditioning voltage signal and then inputting the conditioning voltage signal to the main control module; the main control module is also used for adjusting the voltage regulating signal according to the conditioning voltage signal and a preset voltage signal.
Optionally, the main control module includes: the analog-to-digital sampling unit and the main control unit;
the analog-to-digital sampling unit is electrically connected with the signal conditioning module and is used for converting the conditioning voltage signal into a digital voltage signal and inputting the digital voltage signal to the main control unit.
Optionally, the signal conditioning module includes: the first signal amplifying unit, the second signal amplifying unit and the signal isolating unit;
the signal isolation unit is electrically connected with the first signal amplification unit and the second signal amplification unit respectively; the first signal amplifying unit is used for receiving the analog voltage signal, amplifying the analog voltage signal to form a first amplified signal and inputting the first amplified signal to the signal isolating unit; the signal isolation unit is used for isolating the first amplified signal and inputting the first amplified signal to the second signal amplification unit for second signal amplification.
Optionally, the main control module includes: the digital-to-analog conversion unit and the isolation amplifying unit;
the isolation amplifying unit is respectively and electrically connected with the digital-to-analog conversion unit and the H-bridge control modules, the digital-to-analog conversion unit is used for converting the voltage regulating signals into analog voltage regulating signals, and the isolation amplifying unit is used for carrying out isolation amplification on the analog voltage regulating signals and then inputting the analog voltage regulating signals into the H-bridge control modules.
Optionally, the long pulse modulation control device further includes: the device comprises a light emitting module, a light receiving module and a central control module;
the light emitting module is respectively and electrically connected with the central control module and the main control module, and is used for converting an interlocking electric signal output by the main control module into an interlocking light signal and inputting the interlocking light signal into the central control module when the long pulse modulation control device fails, and the central control module is used for controlling the long pulse modulation control device to stop working according to the interlocking light signal;
the light receiving module is electrically connected with the main control module and is used for receiving external interlocking light signals, converting the external interlocking light signals into external interlocking electric signals and inputting the external interlocking electric signals into the main control module, and the main control module is also used for controlling the long pulse modulation control device to stop working according to the external interlocking electric signals.
Optionally, the main control module further includes: a level conversion unit;
the level conversion unit is electrically connected with the light emitting module and the light receiving module respectively.
Optionally, the long pulse modulation control device further includes: a transfer module;
the switching module is electrically connected with the main control module and the H bridge control modules respectively.
Optionally, the main control module includes: an ethernet interface and a serial communication interface.
According to the technical scheme, the long pulse modulation control device comprises a main control module and a plurality of H-bridge control modules, wherein the main control module simultaneously outputs pulse enabling signals, synchronous clock pulse signals and voltage regulating signals to any one H-bridge control module so as to control the H-bridge control modules to output pulse width modulation signals. That is, the main control module can input pulse enable signals, synchronous clock pulse signals and voltage regulating signals to each H-bridge control module at the same time, so that the H-bridge control module can output millisecond pulse width modulation signals by adjusting the pulse width and the repetition frequency of the pulse enable signals, and further the output precision of the modulation device can be improved to meet the application requirements of different fields.
Drawings
Fig. 1 is a schematic structural diagram of a long pulse modulation control device according to an embodiment of the present invention;
fig. 2 is a schematic phase-shifting diagram of a master control module outputting a pulse enable signal, a synchronous clock pulse signal and a voltage-regulating signal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of closed loop voltage regulation of a long pulse modulation control device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another long pulse modulation control device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a long pulse modulation control device according to an embodiment of the present invention, where, as shown in fig. 1, the long pulse modulation control device includes: a main control module 10 and a plurality of H-bridge control modules 20; the main control module 10 is electrically connected with the H-bridge control modules 20, and is configured to output a pulse enable signal, a synchronous clock pulse signal and a voltage regulation signal to any one of the H-bridge control modules 20, so as to control the H-bridge control modules 20 to output a pulse width modulation signal; wherein the pulse width modulated signal comprises a millisecond pulse width modulated signal.
Specifically, the main control module 10 is used as a control core of the long pulse modulation control device 100, and the control chip may be a field programmable gate array (Field Programmable Gate Array, FPGA). The FPGA chip has larger parallelism and can ensure that a plurality of modules can simultaneously perform independent calculation. The main control module 10 is electrically connected with the H-bridge control modules 20, and the main control module 10 can output pulse enable signals, synchronous clock pulse signals and voltage regulating signals to any one H-bridge control module 20 at the same time, so that the H-bridge control module 20 can output pulse width modulation signals, further drive the H-bridge modules 30 outside the long-pulse modulation control device 100 to work, and realize system pulse form output.
Further, the H-bridge control module 20 can output the millisecond pulse width modulation signal by adjusting the pulse width and the repetition frequency of the pulse enable signal, so that the output precision of the modulation device can be improved to meet the application requirements of different fields.
Illustratively, the H-bridge control module 20 may be understood as a pulse width modulation (Pulse Width Modulation, PWM) controller whose output pulse width modulated signal is capable of driving the H-bridge module 30 to operate.
It should be noted that fig. 1 only shows a technical solution that the long pulse modulation control device 100 includes 6H-bridge control modules 20, and it is understood that the number of the H-bridge control modules 20 may be greater than or less than 6, and the number of the H-bridge control modules 20 is not specifically limited and may be set according to specific actual requirements in the embodiment of the present invention.
The number of H-bridge control modules 20 may also be, for example, 3, 4, 8, 9, etc.
The long pulse modulation control device provided by the embodiment of the invention comprises a main control module and a plurality of H-bridge control modules, wherein the main control module outputs pulse enabling signals, synchronous clock pulse signals and voltage regulating signals to any one H-bridge control module at the same time so as to control the H-bridge control modules to output pulse width modulation signals. That is, the main control module can input pulse enable signals, synchronous clock pulse signals and voltage regulating signals to each H-bridge control module at the same time, so that the H-bridge control module can output millisecond pulse width modulation signals by adjusting the pulse width and the repetition frequency of the pulse enable signals, and further the output precision of the modulation control device can be improved to meet the application requirements of different fields.
Optionally, with continued reference to fig. 1, the main control module 10 is further configured to output pulse enable signals, synchronous clock pulse signals, and voltage regulation signals to the plurality of H-bridge control modules 20 in a time-sharing manner.
Specifically, the H-bridge control module 20 may employ a PWM controller with a phase shift function, and the main control module 10 outputs pulse enable signals, synchronous clock pulse signals, and voltage regulation signals to the plurality of H-bridge control modules 20 in a time-sharing manner instead of outputting pulse enable signals, synchronous clock pulse signals, and voltage regulation signals to the plurality of H-bridge control modules 20 at the same time.
Fig. 2 is a schematic phase-shifting diagram of a master control module outputting a pulse enable signal, a synchronous clock pulse signal and a voltage regulating signal according to an embodiment of the present invention, as shown in fig. 2, when the long pulse modulation control device includes 6H-bridge control modules 20, one of the H-bridge control modules 20 may be fixed to serve as a reference, and pulse enable signals received by the other 5H-bridge control modules 20 are phase-shifted based on the reference pulse enable signal, where it is understood that the phase-shifting may be an advanced reference pulse enable signal or a delayed reference pulse enable signal. Because the pulse enable signal is phase-shifted, the corresponding synchronous clock signal and the voltage regulating signal are also phase-shifted. According to the embodiment of the invention, the pulse enabling signals, the synchronous clock pulse signals and the voltage regulating signals are output to the H bridge control modules 20 in a time sharing manner through the main control module 10, so that the pulse enabling signals, the synchronous clock pulse signals and the voltage regulating signals which are input to the H bridge control modules 20 can be phase-shifted, and further the H bridge modules 30 can be driven by the pulse modulating signals output by the H bridge control modules 20, so that the waveforms output by the H bridge modules 30 are overlapped with wave crests and wave troughs, the high-voltage pulse ripple can be reduced, the high-voltage drop is low, the rapid high-voltage top drop compensation can be realized, and the problem that the cost of the compensation is high when the traditional modulating device is used for maintaining the ultra-long high-voltage pulse waveform in the prior art can be solved.
For example, based on the pulse enable signal a1 received by the first H-bridge control module 201, the pulse enable signal a2 received by the second H-bridge control module 202 may lag the reference pulse enable signal a1 by time t, and thus, the synchronous clock signal b2 and the voltage regulation signal c2 received by the second H-bridge control module 202 lag the synchronous clock signal b1 and the voltage regulation signal c1 received by the first H-bridge control module 201 by time t. Similarly, the pulse enable signals received by the third H-bridge control module 203, the fourth H-bridge control module 204, the fifth H-bridge control module 205, and the sixth H-bridge control module 206 all lag the previous H-bridge control module 20 (not shown) by time t. The frequency setting value of the synchronous clock pulse signal may be 32kHz, and the frequency of the output pulse width modulation signal of the h-bridge control module 20 is half of that of the synchronous clock pulse signal, namely 16kHz, so that the phase shift time t should not be greater than 62.5 μs. The phase sequence relation of the 6 paths of pulse enabling signals is reasonably set, so that high-voltage pulse ripple waves output by the modulation device can be reduced, and the actual application requirements are met.
Optionally, fig. 3 is a schematic diagram of closed loop voltage regulation of a long pulse modulation control device according to an embodiment of the present invention, and with continued reference to fig. 1 and fig. 3, the long pulse modulation control device 100 further includes: a signal conditioning module 40; the signal conditioning module 40 is electrically connected with the main control module 10, and is configured to receive the analog voltage signal output by the long pulse modulation control device 100, perform isolation amplification on the analog voltage signal to form a conditioned voltage signal, and input the conditioned voltage signal to the main control module 10; the main control module 10 is further configured to adjust the voltage regulation signal according to the conditioning voltage signal and the preset voltage signal.
Specifically, the voltage sensor can collect the analog voltage signal output by the long pulse modulation control device 100, the analog voltage signal is isolated and amplified by the signal conditioning module 40 to form a conditioning voltage signal, and the main control module 10 adjusts the voltage regulating signal according to the difference value between the conditioning voltage signal and the preset voltage signal, so that closed loop voltage regulation can be realized and flat top compensation can be flexibly performed. In other words, the overall voltage-stabilizing output of the long pulse modulation control device 100 can be realized by closed-loop voltage regulation, so that the flat-top degree of the output pulse can be ensured to meet the index requirement. It should be noted that the main control module 10 may include an analog-to-digital sampling unit, and the analog-to-digital sampling unit may convert the conditioning voltage signal into a digital voltage signal.
Further, the closed loop voltage regulation can adopt a typical proportional integral (Proportional Integral, PI) control algorithm to realize error regulation of the system. The PI control algorithm has the fast response of P control and the stability of I control, so that the closed-loop voltage regulation efficiency can be ensured. When the preset voltage signal and the analog voltage signal output by the long pulse modulation control device 100 have a difference value, the duty ratio of the pulse width modulation signal of the H-bridge control module can be adjusted by adjusting the voltage regulation signal, so that closed loop voltage regulation is realized.
It will be appreciated that the preset voltage signal may be set by human.
It should be noted that, the current sensor may collect an analog current signal output by the long pulse modulation control device 100, where the analog current signal may include a total analog current signal output by the long pulse modulation control device 100 and a sub-analog current signal output by each functional module, and the analog current signal is isolated and amplified by the signal conditioning module 40 to form a conditioned current signal, and then passed through the main control module 10 and then displayed by the display module.
Further, fig. 4 is a schematic structural diagram of another long pulse modulation control device according to an embodiment of the present invention, and as shown in fig. 4, a main control module 10 includes: an analog-to-digital sampling unit 101 and a master control unit 102; the analog-to-digital sampling unit 101 is electrically connected to the signal conditioning module 40, and is configured to convert the conditioning voltage signal into a digital voltage signal and input the digital voltage signal to the main control unit 102.
Specifically, the analog voltage signal output by the long pulse modulation control device 100 is isolated and amplified by the signal conditioning module 40 to form a conditioning voltage signal, and the analog-to-digital sampling unit 101 can convert the conditioning voltage signal into a digital voltage signal and input the digital voltage signal to the main control unit 102, so that the main control unit 102 calculates a difference value between the digital voltage signal and a preset voltage signal, and adjusts the voltage regulating signal of the main control module 10 according to the difference value of the digital voltage signal and the preset voltage signal, so as to realize closed-loop voltage regulation.
Optionally, with continued reference to fig. 4, the signal conditioning module 40 includes: a first signal amplifying unit 401, a second signal amplifying unit 402, and a signal isolating unit 403; the signal isolation unit 403 is electrically connected to the first signal amplification unit 401 and the second signal amplification unit 402, respectively; the first signal amplifying unit 401 is configured to receive an analog voltage signal, amplify the analog voltage signal to form a first amplified signal, and input the first amplified signal to the signal isolating unit 403; the signal isolation unit 403 is configured to isolate the first amplified signal and then input the isolated first amplified signal to the second signal amplification unit 402 for second signal amplification.
Specifically, the analog voltage signal output by the long pulse modulation control device 100 enters the signal conditioning module 40, and is amplified by the first signal amplifying unit 401 to form a first amplified signal, and then the first amplified signal is isolated by the signal isolating unit 403, and the isolated signal is input to the second signal amplifying unit 402 for second signal amplification. Because the signal conditioning module 40 is electrically connected with the main control module 10, the signal after the second amplification is converted into a digital voltage signal by the analog-digital sampling unit 101 and then is input into the main control unit 102.
Optionally, with continued reference to fig. 4, the master control module 10 includes: a digital-to-analog conversion unit 103 and an isolation amplification unit 104; the isolation amplifying unit 104 is electrically connected to the digital-to-analog conversion unit 103 and the H-bridge control modules 20, the digital-to-analog conversion unit 103 is configured to convert the voltage regulation signal into an analog voltage regulation signal, and the isolation amplifying unit 104 is configured to isolate and amplify the analog voltage regulation signal and input the amplified analog voltage regulation signal to the H-bridge control modules 20.
Specifically, in the closed-loop voltage regulation process, the main control module 10 can receive the voltage signal output by the long-pulse modulation control device, perform operation according to the difference value between the preset voltage and the voltage signal through a PI control algorithm, and the voltage signal output by the operation result is digital, and can be converted into an analog voltage regulation signal through the digital-to-analog conversion unit 103, and the analog voltage regulation signal is input to the plurality of H-bridge control modules 20 after being isolated and amplified by the isolation amplifying unit 104.
Further, the isolation amplifying unit 104 may further include a voltage dividing subunit, an optical coupling isolation subunit, and a digital isolation subunit, where the voltage dividing subunit is configured to divide the analog voltage regulating signal into n and input the n to the plurality of H-bridge control modules 20, where n represents the number of the H-bridge control modules 20; the optocoupler isolation subunit is configured to input the analog pulse enable signal to the plurality of H-bridge control modules 20 after performing optocoupler isolation; the digital isolation subunit is configured to digitally isolate the analog synchronous clock signal and input the analog synchronous clock signal to the plurality of H-bridge control modules 20.
Optionally, with continued reference to fig. 1, the long pulse modulation control apparatus 100 further includes: a light emitting module 50, a light receiving module 60, and a central control module 70; the light emitting module 50 is electrically connected with the central control module 70 and the main control module 10 respectively, and is used for converting an interlocking electric signal output by the main control module 10 into an interlocking optical signal and inputting the interlocking optical signal to the central control module 70 when the long pulse modulation control device 100 fails, and the central control module 70 is used for controlling the long pulse modulation control device 100 to stop working according to the interlocking optical signal; the light receiving module 60 is electrically connected with the main control module 10, and is configured to receive an external interlocking light signal, convert the external interlocking light signal into an external interlocking electrical signal, and input the external interlocking electrical signal to the main control module 10, where the main control module 10 is further configured to control the long pulse modulation control device 100 to stop working according to the external interlocking electrical signal.
Specifically, the main control module 10 is electrically connected to the H-bridge control modules 20, the main control module 10 may receive feedback signals of the H-bridge control modules 20, where the feedback signals may include signals such as a switching state, a temperature, a current, and a voltage of an Insulated Gate Bipolar Transistor (IGBT) in the H-bridge control modules 20, when the long pulse modulation control device 100 fails, that is, when the signals such as the switching state, the temperature, the current, or the voltage of the IGBT are in an abnormal state, the main control module 10 may output an interlocking electrical signal to the light emitting module 50, the light emitting module 50 may convert the interlocking electrical signal into an interlocking optical signal and then input the interlocking optical signal to the central control module 70, and the central control module 70 may control the long pulse modulation control device 100 to stop working according to the interlocking optical signal, so that the long pulse modulation control device 100 can stop in time when failing, and loss of the modulation control device is reduced.
It will be appreciated that the long pulse modulation control apparatus 100 may further include a display module electrically connected to the main control module 10, so that the feedback signal may be displayed by the display module for the user to check.
Specifically, the light receiving module 60 may receive an external interlocking light signal, where the external interlocking light signal may include an emergency stop signal, a fire striking signal, etc., the light receiving module 60 may convert the external interlocking light signal into an external interlocking electric signal, and then input the external interlocking electric signal to the main control module 10, and the main control module 10 may control the long pulse modulation control device 100 to stop working according to the external interlocking electric signal.
It can be understood that the optical transmitting module 50 and the optical receiving module 60 can perform conversion between an electrical signal and an optical signal, and the transmission speed of the optical signal is close to the optical speed and is far greater than the transmission speed of the electrical signal, so that the embodiment of the invention can stop working in time when the inside of the long pulse modulation control device 100 fails or the outside fails by adopting the optical transmitting module 50 and the optical receiving module 60, thereby reducing the loss of the modulation control device.
It should be noted that, only when the parameter performance (such as temperature, voltage, and current) of each functional module in the long pulse modulation control device 100 is normal, the main control module 10 can normally output the pulse enable signal, the synchronous clock signal, and the voltage regulation signal, otherwise, the output of the pulse enable signal, the synchronous clock signal, and the voltage regulation signal is stopped, and the long pulse modulation control device 100 does not operate.
Further, with continued reference to fig. 4, the main control module 10 further includes: a level conversion unit 105; the level conversion unit 105 is electrically connected to the light emitting module 50 and the light receiving module 60, respectively.
Specifically, since the working voltages of the light emitting module 50 and the light receiving module 60 are different from the working voltage of the main control module 10, the level conversion can be realized by setting the level conversion unit 105 in the main control module 10, so that the light emitting module, the light receiving module 60 and the main control module 10 can work normally, and further, the signal transmission can be ensured, and the operation can be stopped in time when the inside or the outside of the modulation control device fails.
When the main control module 10 includes the main control unit 102, the level conversion unit 105 may be electrically connected to the main control unit 102, and when the main control unit 102 adopts an FPGA chip, the normal operating voltage of the main control unit is 3.3V, and the normal operating voltages of the light emitting module and the light receiving module 60 are 5V, so that the conversion of the voltage value can be realized by the level conversion unit 105, and the normal operating performance of the long pulse modulation control device 100 is ensured.
Optionally, with continued reference to fig. 1, the long pulse modulation control apparatus 100 further includes: a transfer module 80; the switching module 80 is electrically connected to the main control module 10 and the H-bridge control modules 20.
Specifically, the switching module 80 may be used as a bridge between the main control module 10 and the H-bridge control modules 20 or other functional modules, and by setting the switching module 80, on one hand, signal transmission between the main control module 10 and other functional modules can be achieved, and on the other hand, the expansibility of the long pulse modulation control device 100 can be improved.
It can be understood that the long pulse modulation control device 100 may include more functional modules, so in structural design, the main control module 10 and the switching module 80 may be tiled at the bottom of the system, and the other functional modules may be erected at the back plate of the system, and the connection on the board is exposed through the back plate hole, so that the space can be saved, and the system wiring is facilitated.
Optionally, with continued reference to fig. 4, the master control module 10 includes: an ethernet interface 91 and a serial communication interface 92.
Specifically, the ethernet interface 91 may be connected to a programmable logic controller (Programmable Logic Controller, PLC) to realize remote control of the long pulse modulation control device. The serial communication interface 92 may be connected to a touch screen, and may implement switching between a local control mode (manual control) and a remote control mode (remote control) through the touch screen, where parameter configuration, enabling output and stopping, fault resetting, H-bridge operation status, and modulation control device output status display may be completed in the local control mode.
It can be understood that the long pulse modulation control device may include an internal synchronization and an external synchronization, where the internal synchronization is to start the main control module to output a pulse enable signal, a synchronous clock pulse signal and a voltage regulation signal after completing parameter configuration through the touch screen, where the parameter configuration may include setting a pulse width, a repetition frequency, a voltage regulation signal, a total output voltage value, a phase shift parameter, a soft start parameter, and the like of the pulse enable signal. The external synchronization is to receive a pulse enabling signal outside the system, and start the main control module to output the pulse enabling signal, the synchronous clock pulse signal and the voltage regulating signal after finishing setting the voltage regulating signal, the total output voltage value, the phase shifting parameter and the soft starting parameter through the touch screen. It should be noted that, no matter the internal synchronization or the external synchronization, the pulse enable signal, the synchronous clock pulse signal and the voltage regulating signal are output through the main control module.
It can be understood that the working modes of the long pulse modulation control device can include a continuous mode and a debugging mode, the continuous mode can be understood as that the main control module controls the plurality of H-bridge control modules to continuously output pulse width modulation signals, and the debugging mode can be understood as that the main control module controls the plurality of H-bridge control modules to discontinuously output pulse width modulation signals, so that performance test is conveniently performed on the modulation device.
By way of example, the serial communication interface 92 may employ an RS485 communication interface.
In summary, the long pulse modulation control device provided by the embodiment of the invention comprises a main control module and a plurality of H-bridge control modules, wherein the main control module outputs pulse enabling signals, synchronous clock pulse signals and voltage regulating signals to any one H-bridge control module at the same time so as to control the H-bridge control modules to output pulse width modulation signals. That is, the main control module can input the pulse enable signal, the synchronous clock pulse signal and the voltage regulating signal to each H-bridge control module at the same time, so that the H-bridge control module can output the pulse width modulation signal by adjusting the pulse width and the repetition frequency of the pulse enable signal to drive the H-bridge module 30, and further, the output precision of the modulation device can be improved to meet the application requirements of different fields. In addition, through signal conditioning module and main control module electricity connection, main control module adjusts the voltage regulation signal according to the difference of conditioning voltage signal and preset voltage signal, can realize closed loop voltage regulation and can carry out flat top compensation in a flexible way. Further, the master control module outputs pulse enable signals, synchronous clock pulse signals and voltage regulating signals to the H-bridge control modules 20 in a time-sharing manner, so that the problem that in the prior art, when a traditional modulation device is adopted to maintain an ultra-long high-voltage pulse waveform, top drop is easy to generate and compensation cost is high can be solved.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A long pulse modulation control apparatus comprising: a main control module and a plurality of H-bridge control modules;
the main control module is electrically connected with the H-bridge control modules and is used for simultaneously outputting pulse enabling signals, synchronous clock pulse signals and voltage regulating signals to any one of the H-bridge control modules so as to control the H-bridge control modules to output pulse width modulation signals;
wherein the pulse width modulated signal comprises a millisecond pulse width modulated signal.
2. The long pulse modulation control apparatus of claim 1, wherein the master control module is further configured to output the pulse enable signal, the synchronous clock pulse signal, and the voltage regulation signal to the plurality of H-bridge control modules in a time-sharing manner.
3. The long-pulse modulation control apparatus according to claim 1, characterized in that the long-pulse modulation control apparatus further comprises: a signal conditioning module;
the signal conditioning module is electrically connected with the main control module and is used for receiving the analog voltage signal output by the long pulse modulation control device, isolating and amplifying the analog voltage signal to form a conditioning voltage signal and then inputting the conditioning voltage signal to the main control module; the main control module is also used for adjusting the voltage regulating signal according to the conditioning voltage signal and a preset voltage signal.
4. The long-pulse modulation control apparatus according to claim 3, wherein the main control module comprises: the analog-to-digital sampling unit and the main control unit;
the analog-to-digital sampling unit is electrically connected with the signal conditioning module and is used for converting the conditioning voltage signal into a digital voltage signal and inputting the digital voltage signal to the main control unit.
5. A long pulse modulation control apparatus in accordance with claim 3, wherein said signal conditioning module comprises: the first signal amplifying unit, the second signal amplifying unit and the signal isolating unit;
the signal isolation unit is electrically connected with the first signal amplification unit and the second signal amplification unit respectively; the first signal amplifying unit is used for receiving the analog voltage signal, amplifying the analog voltage signal to form a first amplified signal and inputting the first amplified signal to the signal isolating unit; the signal isolation unit is used for isolating the first amplified signal and inputting the first amplified signal to the second signal amplification unit for second signal amplification.
6. The long pulse modulation control apparatus of claim 1, wherein the master control module comprises: the digital-to-analog conversion unit and the isolation amplifying unit;
the isolation amplifying unit is respectively and electrically connected with the digital-to-analog conversion unit and the H-bridge control modules, the digital-to-analog conversion unit is used for converting the voltage regulating signals into analog voltage regulating signals, and the isolation amplifying unit is used for carrying out isolation amplification on the analog voltage regulating signals and then inputting the analog voltage regulating signals into the H-bridge control modules.
7. The long-pulse modulation control apparatus according to claim 1, characterized in that the long-pulse modulation control apparatus further comprises: the device comprises a light emitting module, a light receiving module and a central control module;
the light emitting module is respectively and electrically connected with the central control module and the main control module, and is used for converting an interlocking electric signal output by the main control module into an interlocking light signal and inputting the interlocking light signal into the central control module when the long pulse modulation control device fails, and the central control module is used for controlling the long pulse modulation control device to stop working according to the interlocking light signal;
the light receiving module is electrically connected with the main control module and is used for receiving external interlocking light signals, converting the external interlocking light signals into external interlocking electric signals and inputting the external interlocking electric signals into the main control module, and the main control module is also used for controlling the long pulse modulation control device to stop working according to the external interlocking electric signals.
8. The long pulse modulation control apparatus of claim 7, wherein the master control module further comprises: a level conversion unit;
the level conversion unit is electrically connected with the light emitting module and the light receiving module respectively.
9. The long-pulse modulation control apparatus according to claim 1, characterized in that the long-pulse modulation control apparatus further comprises: a transfer module;
the switching module is electrically connected with the main control module and the H bridge control modules respectively.
10. The long pulse modulation control apparatus of claim 1, wherein the master control module comprises: an ethernet interface and a serial communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311569238.1A CN117614425A (en) | 2023-11-22 | 2023-11-22 | Long pulse modulation control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311569238.1A CN117614425A (en) | 2023-11-22 | 2023-11-22 | Long pulse modulation control device |
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| Publication Number | Publication Date |
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| CN117614425A true CN117614425A (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311569238.1A Pending CN117614425A (en) | 2023-11-22 | 2023-11-22 | Long pulse modulation control device |
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| Country | Link |
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| CN (1) | CN117614425A (en) |
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- 2023-11-22 CN CN202311569238.1A patent/CN117614425A/en active Pending
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