CN116722848B - Power control method and system based on pulse modulation signal - Google Patents
Power control method and system based on pulse modulation signal Download PDFInfo
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- CN116722848B CN116722848B CN202310978192.2A CN202310978192A CN116722848B CN 116722848 B CN116722848 B CN 116722848B CN 202310978192 A CN202310978192 A CN 202310978192A CN 116722848 B CN116722848 B CN 116722848B
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- 238000000034 method Methods 0.000 title claims description 15
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 42
- 238000012544 monitoring process Methods 0.000 claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000001960 triggered effect Effects 0.000 abstract description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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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
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
- H03K5/05—Shaping pulses by increasing duration; by decreasing duration by the use of clock signals or other time reference signals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention relates to a power control system based on a pulse modulation signal, which is characterized in that the output end of a pulse modulation signal generation module is connected with a pulse modulation signal monitoring compensation module to monitor the pulse modulation signal generated by the pulse modulation signal generation module, timing is carried out according to the pulse modulation signal, if the power detection module sends a trigger signal to the pulse modulation signal generation module in a timing period, the pulse modulation signal generation module is triggered to generate the pulse modulation signal, and the system stops timing when the system works normally; when the system is abnormal, the power detection circuit cannot detect the power drop and cannot trigger the starting pulse modulation signal generation module to output a pulse modulation signal, so that the timing exceeds the preset time, and a compensated trigger signal is generated to trigger the pulse modulation signal generation module to output the pulse modulation signal, so that the power is stable; therefore, the problem of unstable output power caused by the loss of triggering of the pulse modulation signal when the system is loaded or has strong interference can be avoided.
Description
Technical Field
The present invention relates to the field of comparator technologies, and in particular, to a power control method and system based on a pulse modulation signal.
Background
A pulse modulation signal (pulse width modulation) signal is a technique of controlling output power by changing the pulse width of a signal. In the power control circuit, the pulse modulation signal is used for driving a load, and when the pulse modulation signal is in a high level state, the load outputs power; and when the pulse modulation signal is in a low level state, the load stops outputting power. To achieve a smooth output of dynamic power maintenance, a power detection circuit is typically added. The power detection circuit is used for monitoring the power level of the load output. When a power drop is detected, it triggers the start of the pulse modulated signal output. The purpose of this is to make the output power of the load stable at a preset level and maintain a smooth output by detecting the power change in time and adjusting. Through the combination of the pulse modulation signal and the power detection circuit, the power control circuit can realize the accurate control and dynamic adjustment of the output power of the load, thereby meeting the requirements of different application scenes on power requirements.
However, this control approach generally has the following drawbacks: when the system is loaded, the power is not increased, the power drop cannot be detected, and the power detection circuit is not triggered, so that the driving signal output by the pulse modulation signal is lost, and the power circuit can reduce the power after not receiving the driving, so that the power is unstable; when the system has strong interference, the power drop can not be detected, and the trigger is lost, so that the power is unstable.
Based on this, a new solution is needed.
Disclosure of Invention
The invention aims to provide a power control system based on a pulse modulation signal, which aims to solve the problem of unstable output power caused by the loss of the trigger of the pulse modulation signal when the system is loaded or has strong interference.
According to an aspect of the present invention, there is provided a power control system based on a pulse modulation signal, which is connected to an input terminal of a power control circuit, and includes a power detection module, a pulse modulation signal generation module, and a pulse modulation signal monitoring compensation module, wherein an output terminal of the power detection module is connected to an input terminal of the pulse modulation signal generation module, an output terminal of the pulse modulation signal generation module is connected to an input terminal of the power control circuit and an input terminal of the pulse modulation signal monitoring compensation module, an output terminal of the pulse modulation signal monitoring compensation module is connected to an input terminal of the pulse modulation signal generation module, an output terminal of the power control circuit is connected to an input terminal of the power detection module,
the power detection module is used for detecting the output power of the power control circuit, and sending a trigger signal to the pulse modulation signal generation module when the output power of the power control circuit is reduced;
the pulse modulation signal monitoring compensation module is used for monitoring the pulse modulation signal generated by the pulse modulation signal generation module, timing according to the pulse modulation signal, and sending a trigger signal to the pulse modulation signal generation module and resetting when the timing time exceeds a preset value;
the pulse modulation signal generation module is used for generating the pulse modulation signal according to the trigger signal so as to drive the power control circuit.
In the power control system based on the pulse modulation signal, the pulse modulation signal monitoring compensation module starts timing when the output period of the pulse modulation signal is ended, and stops timing and clears when the output period of the pulse modulation signal is started.
In the power control system based on the pulse modulation signal, the pulse modulation signal monitoring compensation module comprises a signal monitoring unit, a timing unit and a judging unit,
the signal monitoring unit is used for monitoring the pulse modulation signal, generating a timing starting signal when the output period of the pulse modulation signal is ended, and generating a timing stopping signal when the output period of the pulse modulation signal is started;
the timing unit is used for starting timing under the control of the starting signal, stopping timing under the control of the timing stopping signal and resetting;
the judging unit is used for judging whether the timing time of the timing unit exceeds a preset value, and generating a trigger signal when the timing time exceeds the preset value.
In the power control system based on the pulse modulation signal provided by the invention, the timing unit comprises a counter and an or gate, wherein the input end of the or gate is connected with the timing stop signal and the output end of the judging unit, the starting end of the counter receives the timing start signal, and the reset end of the counter receives the output end of the or gate.
According to another aspect of the present invention, there is also provided a power control method based on a pulse modulation signal, including:
detecting the output power of a power control circuit, and sending a trigger signal to a pulse modulation signal generation module when the output power of the power control circuit is reduced;
generating a pulse modulation signal according to the trigger signal to drive the power control circuit;
and monitoring the pulse modulation signal, timing according to the pulse modulation signal, and sending a trigger signal to the pulse modulation signal generation module and resetting when the timing time exceeds a preset value.
In the power control method based on the pulse modulation signal provided by the invention, the pulse modulation signal is monitored, timing is performed according to the pulse modulation signal, and when the timing time exceeds a preset value, the step of sending a trigger signal to the pulse modulation signal generation module and resetting the trigger signal comprises the following steps:
monitoring the pulse modulation signal and generating a timing start signal or a timing stop signal;
starting timing under the control of the starting signal, judging whether the timing time exceeds a preset value, and generating a trigger signal and resetting when the timing time exceeds the preset value;
and stopping timing under the control of the timing stop signal and resetting.
In the power control method based on a pulse modulation signal according to the present invention, in the step of generating a timing start signal or a timing stop signal by monitoring the pulse modulation signal, the timing is started at the end of the output period of the pulse modulation signal, and the timing is stopped at the start of the output period of the pulse modulation signal
The power control method and system based on the pulse modulation signal have the following beneficial effects: according to the power control system based on the pulse modulation signal, the pulse modulation signal generated by the pulse modulation signal generation module is monitored by the pulse modulation signal monitoring compensation module connected with the output end of the pulse modulation signal generation module, timing is carried out according to the pulse modulation signal, and if the power detection module sends a trigger signal to the pulse modulation signal generation module in a timing period, the pulse modulation signal generation module is triggered to generate the pulse modulation signal, and the system is stopped from timing when normally working; when the system is abnormal, the power detection circuit cannot detect the power drop and cannot trigger the starting pulse modulation signal generation module to output a pulse modulation signal, so that the timing exceeds the preset time, and a compensated trigger signal is generated to trigger the pulse modulation signal generation module to output the pulse modulation signal, so that the power is stable; therefore, the problem of unstable output power caused by the loss of triggering of the pulse modulation signal when the system is loaded or has strong interference can be avoided.
Drawings
For a clearer description of an embodiment of the invention or of a technical solution in the prior art, the drawings that are needed in the description of the embodiment or of the prior art will be briefly described, it being obvious that the drawings in the description below are only embodiments of the invention, and that other drawings can be obtained, without inventive effort, by a person skilled in the art from the drawings provided:
fig. 1 is a schematic diagram of a power control system based on a pulse modulation signal according to the present invention.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Exemplary embodiments of the present invention are illustrated in the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention has the following general ideas: aiming at the problem that when the existing system has load or strong interference, the triggering of a pulse modulation signal is lost and the output power is unstable, the power control system based on the pulse modulation signal is provided, the pulse modulation signal generated by the pulse modulation signal generating module is monitored by a pulse modulation signal monitoring compensation module connected with the output end of the pulse modulation signal generating module, the timing is carried out according to the pulse modulation signal, if the power detection module sends the triggering signal to the pulse modulation signal generating module in the timing period, the pulse modulation signal generating module is triggered to generate the pulse modulation signal, and the timing is stopped when the system is indicated to work normally; when the system is abnormal, the power detection circuit cannot detect the power drop and cannot trigger the starting pulse modulation signal generation module to output a pulse modulation signal, so that the timing exceeds the preset time, and a compensated trigger signal is generated to trigger the pulse modulation signal generation module to output the pulse modulation signal, so that the power is stable; therefore, the problem of unstable output power caused by the loss of triggering of the pulse modulation signal when the system is loaded or has strong interference can be avoided.
In order to better understand the above technical solutions, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and it should be understood that specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features in the embodiments and examples of the present invention may be combined with each other without conflict.
Fig. 1 is a schematic diagram of a power control system based on a pulse modulation signal according to the present invention. As shown in fig. 1, the power control system based on a pulse modulation signal provided by the present invention is connected to an input end of a power control circuit 40, and includes a power detection module 10, a pulse modulation signal generation module 20 and a pulse modulation signal monitoring compensation module 30.
Specifically, in one embodiment of the present invention, the input terminal of the power detection module 10 is connected to the output terminal of the power control circuit 40, and the output terminal of the power detection module 10 is connected to the input terminal of the pulse modulation signal generation module 20. The power detection module 10 detects the output power of the power control circuit, and when the output power of the power control circuit decreases, sends a trigger signal to the pulse modulation signal generation module.
Specifically, in one embodiment of the present invention, the output terminal of the pulse modulation signal generating module 20 is connected to the input terminal 40 of the power control circuit and the input terminal of the pulse modulation signal monitoring compensation module 30, and the pulse modulation signal is generated according to the trigger signal to drive the power control circuit.
Specifically, in an embodiment of the present invention, the output end of the pwm signal monitoring compensation module 30 is connected to the input end of the pwm signal generating module 20, and is configured to monitor the pwm signal generated by the pwm signal generating module, time according to the pwm signal, and send a trigger signal to the pwm signal generating module and clear when the time exceeds a preset value, where the preset value of the time is related to the load of the power control circuit. Normally, the pulse modulation signal monitoring compensation module 30 starts timing when the output period of the pulse modulation signal is ended, and stops timing and clears when the output period of the pulse modulation signal is started. Specifically, the pulse modulation signal monitoring and compensating module 30 starts timing when detecting that the pulse modulation signal generating module does not output a signal, if the system works normally, the power detecting module sends a trigger signal to the pulse modulation signal generating module when detecting that the output power of the power control circuit decreases in the timing period, the pulse modulation signal generating module is triggered to generate a pulse modulation signal, and at the moment, the pulse modulation signal monitoring and compensating module 30 stops timing when detecting that the pulse modulation signal generating module outputs a signal; if the system is abnormal, the power detection circuit cannot detect the output power drop of the power control circuit, and cannot trigger the starting pulse modulation signal generation module to output the pulse modulation signal, so that the timing exceeds the preset time, and at the moment, a compensated trigger signal is generated to trigger the pulse modulation signal generation module to output the pulse modulation signal, so that the power is stable. Thus, the pulse modulated signal monitoring compensation module 30 includes:
a signal monitoring unit 310, configured to monitor the pulse modulation signal, generate a timing start signal when an output period of the pulse modulation signal is over, and generate a timing stop signal when the output period of the pulse modulation signal is over;
a timing unit 320, configured to start timing under control of the start signal, stop timing under control of the timing stop signal, and clear;
and a judging unit 330, configured to judge whether the timing time of the timing unit exceeds a preset value, and generate a trigger signal when the timing time exceeds the preset value.
Further, the timing unit 320 includes a counter and an or gate, where an input end of the or gate is connected to the timing stop signal and an output end of the judging unit, a start end of the counter receives the timing start signal, and a reset end of the counter receives an output end of the or gate. Specifically, the start signal of the counter is an output period end signal of the pulse modulation signal, and the signal that is stopped and reset is an output period start signal of the pulse modulation signal; the counter sets the maximum count value to cnt_max, and if the count exceeds cnt_max, actively generates a trigger signal of a pulse modulation signal, and clears itself to be ready for the next operation.
The invention also provides a power control method based on the pulse modulation signal, which comprises the following steps:
s1, detecting output power of a power control circuit, and sending a trigger signal to a pulse modulation signal generation module when the output power of the power control circuit is reduced;
s2, generating a pulse modulation signal according to the trigger signal so as to drive the power control circuit;
and S3, monitoring the pulse modulation signal, timing according to the pulse modulation signal, and sending a trigger signal to the pulse modulation signal generation module and clearing when the timing time exceeds a preset value.
Specifically, in an embodiment of the present invention, when it is detected that the pulse modulation signal generating module does not output a signal, timing is started, if the system works normally, in a timing period, a trigger signal is sent to the pulse modulation signal generating module when it is detected that the output power of the power control circuit decreases, the pulse modulation signal generating module is triggered to generate a pulse modulation signal, and when it is detected that the pulse modulation signal generating module outputs a signal, timing is stopped; if the system is abnormal, the output power of the power control circuit cannot be detected to be reduced, the starting pulse modulation signal generating module cannot be triggered to output the pulse modulation signal, the timing exceeds the preset time, and at the moment, a compensated trigger signal is generated to trigger the pulse modulation signal generating module to output the pulse modulation signal, so that the power is stable. Thus, step S3 comprises:
s31, monitoring the pulse modulation signal and generating a timing start signal or a timing stop signal; starting timing at the end of the output period of the pulse modulation signal, and stopping timing at the start of the output period of the pulse modulation signal;
s32, starting timing under the control of the starting signal, judging whether the timing time exceeds a preset value, and generating a trigger signal and resetting when the timing time exceeds the preset value;
s33, stopping timing under the control of the timing stop signal and resetting.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
Claims (7)
1. The power control system based on the pulse modulation signal is connected with the input end of a power control circuit and is characterized by comprising a power detection module, a pulse modulation signal generation module and a pulse modulation signal monitoring compensation module, wherein the output end of the power detection module is connected with the input end of the pulse modulation signal generation module, the output end of the pulse modulation signal generation module is connected with the input end of the power control circuit and the input end of the pulse modulation signal monitoring compensation module, the output end of the pulse modulation signal monitoring compensation module is connected with the input end of the pulse modulation signal generation module, the output end of the power control circuit is connected with the input end of the power detection module,
the power detection module is used for detecting the output power of the power control circuit, and sending a first trigger signal to the pulse modulation signal generation module when the output power of the power control circuit is reduced;
the pulse modulation signal monitoring compensation module is used for monitoring the pulse modulation signal generated by the pulse modulation signal generation module, timing according to the pulse modulation signal, and sending a second trigger signal to the pulse modulation signal generation module and clearing when the timing time exceeds a preset value;
the pulse modulation signal generation module is used for generating the pulse modulation signal according to the first trigger signal or the second trigger signal so as to drive the power control circuit.
2. The pulse modulated signal based power control system of claim 1, wherein the pulse modulated signal monitoring compensation module starts timing at the end of the output period of the pulse modulated signal and stops timing and clears at the start of the output period of the pulse modulated signal.
3. The system of claim 2, wherein the pulse modulated signal monitoring and compensating module comprises a signal monitoring unit, a timing unit and a judging unit,
the signal monitoring unit is used for monitoring the pulse modulation signal, generating a timing starting signal when the output period of the pulse modulation signal is ended, and generating a timing stopping signal when the output period of the pulse modulation signal is started;
the timing unit is used for starting timing under the control of the starting signal, stopping timing under the control of the timing stopping signal and resetting;
the judging unit is used for judging whether the timing time of the timing unit exceeds a preset value, and generating a second trigger signal when the timing time exceeds the preset value.
4. The pulse modulated signal based power control system of claim 3, wherein the timing unit comprises a counter and an or gate, an input terminal of the or gate is connected to the timing stop signal and an output terminal of the judging unit, an enable terminal of the counter receives the timing start signal, and a reset terminal of the counter receives the output terminal of the or gate.
5. A power control method of a power control system based on a pulse modulated signal according to any one of claims 1-4, characterized by comprising the steps of:
detecting the output power of a power control circuit, and sending a first trigger signal to a pulse modulation signal generation module when the output power of the power control circuit is reduced;
generating a pulse modulation signal according to the first trigger signal to drive the power control circuit;
and monitoring the pulse modulation signal, timing according to the pulse modulation signal, and sending a second trigger signal to the pulse modulation signal generation module and resetting when the timing time exceeds a preset value.
6. The method of claim 5, wherein monitoring the pulse modulated signal, timing according to the pulse modulated signal, and transmitting a second trigger signal to the pulse modulated signal generating module and clearing when the timing time exceeds a preset value comprises:
monitoring the pulse modulation signal and generating a timing start signal or a timing stop signal;
starting timing under the control of the starting signal, judging whether the timing time exceeds a preset value, and generating a second trigger signal and clearing when the timing time exceeds the preset value;
and stopping timing under the control of the timing stop signal and resetting.
7. The power control method according to claim 6, wherein in the step of monitoring the pulse modulation signal and generating a timing start signal or a timing stop signal, timing is started at the end of an output period of the pulse modulation signal, and timing is stopped at the start of the output period of the pulse modulation signal.
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| CN202310978192.2A CN116722848B (en) | 2023-08-04 | 2023-08-04 | Power control method and system based on pulse modulation signal |
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| CN202310978192.2A CN116722848B (en) | 2023-08-04 | 2023-08-04 | Power control method and system based on pulse modulation signal |
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