CN201893761U - Pulse-width modulation (PWM) pulse generator - Google Patents
Pulse-width modulation (PWM) pulse generator Download PDFInfo
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- CN201893761U CN201893761U CN2010206248065U CN201020624806U CN201893761U CN 201893761 U CN201893761 U CN 201893761U CN 2010206248065 U CN2010206248065 U CN 2010206248065U CN 201020624806 U CN201020624806 U CN 201020624806U CN 201893761 U CN201893761 U CN 201893761U
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Abstract
The utility model discloses a pulse-width modulation (PWM) pulse generator, comprising a controller and a pulse generating unit. The output end of the controller is connected with the input end of the pulse generating unit, and the output end of the pulse generating unit outputs pulse signals. The relative independence of pulse generation and pulse width modulation is realized. The controller can control the pulse generating unit to generate pulse and modulate the characteristic parameters of the pulse generated by the pulse generating unit. The characteristic parameters of the pulse comprise pulse frequency, duty ratio and the like. The controller endows characteristic values corresponding to parameters of the required pulse to the pulse generating unit which has a memory function, therefore, when the controller can not normally work due to interference, the pulse generating unit can still generate pulse signals corresponding to the previously received pulse characteristic values, therefore, the anti-interference performance of the pulse generator is improved.
Description
Technical field
The application relates to PWM (Pulse Width Modulation, pulse width modulation) pulse generator technical field, particularly relates to independently two-way pulse generator of pulse generation and pulse-width regulated difference.
Background technology
At present, the direct current that the electrolysis industry needs uses rectifier transformer, reaches the diode rectification mode, and adopt the saturable reactor rectifier transformer usually at the hundreds of thousands ampere, makes the direct current stable and controllable of rectification output.Regulate the secondary voltage of rectifier transformer and regulate direct current output, regulate the electric current of the control winding of saturable reactor exactly, essence is by regulating the duty ratio of IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) trigger impulse.
Rectifier transformer is the one drag two form, need two groups of trigger impulses, it is that control control core device produces and regulate pwm pulse that trigger generator adopts mostly with the single-chip microcomputer, promptly two groups of trigger impulses are directly sent by two I/O ports of single-chip microcomputer, switching between the high-low level that single-chip microcomputer sends realizes the adjusting of trigger impulse duty ratio, two group pulses of single-chip microcomputer output by shaping after, the driver module that connects IGBT, the pulse of driver module output offers IGBT, accurately control the switch of IGBT, thereby finish the copped wave function.
By research to prior art, the inventor finds: this pulse generator produces pulse and regulating impulse produces by Single-chip Controlling, under the environment in the big magnetic field of the big electric current of electrolysis, single-chip microcomputer is easy to be interfered, and causes existing pulse generator interference free performance extreme difference, in case single-chip microcomputer is interfered, to cause the Control current of saturable reactor out of control, make that the average anode current of rectifier transformer is unbalance, whole electrolysis system is cisco unity malfunction, even burns out IGBT.
The utility model content
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of pwm pulse generator, and is separate to realize pulse generation and pulse-width regulated, thereby improves the interference free performance of whole two-way pulse generating unit, and technical scheme is as follows:
A kind of pwm pulse generator comprises: controller and pulse generation unit, wherein:
The output of described controller links to each other with the input of described pulse generation unit, at the output output pulse signal of described pulse generation unit.
Preferably, described pwm pulse generator also comprises: the pulse limit for width unit that links to each other with described pulse generation unit.
Preferably, described controller is a single-chip microcomputer.
Preferably, described pulse generation unit comprises: counter unit and flip-flop element, described flip-flop element comprise first flip-flop element and second flip-flop element, wherein:
The input of described counter unit links to each other with described controller output end as the input of described pulse generation unit;
First output of described counter unit links to each other with the set end of first trigger and second flip-flop element;
Second output of described counter unit links to each other with the reset terminal of first trigger;
The 3rd output of described counter unit links to each other with the reset terminal of second trigger;
The output of described first trigger, second trigger links to each other with first input end, second input of described pulse limit for width unit respectively.
Preferably, described first flip-flop element and described second flip-flop element are d type flip flop.
Preferably, described pwm pulse generator also comprises the power circuit unit, and its power output end links to each other with the power end of described controller, pulse generation unit, pulse limit for width unit respectively.
The technical scheme that provides by above the embodiment of the present application as seen, described pwm pulse generator is controlled described pulse generation unit by controller and is produced required pulse, has realized that pulse generation and pulse-width regulated are relatively independent; Described controller can produce pulse by the control impuls generation unit, and characteristic parameter that can regulating impulse pulse that generation unit produces, described pulse characteristics parameter comprises parameters such as pulse frequency, duty ratio, controller is given the pulse generation unit with the parameter characteristic of correspondence numerical value of required pulse, this pulse unit has memory function, when controller is interfered cisco unity malfunction, described pulse generation unit still can produce the pairing pulse signal of pulse characteristics numerical value that receives before, thereby has improved the interference free performance of described pulse generator.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the disclosed a kind of pwm pulse generator of the embodiment of the present application;
Fig. 2 is the structural representation of the disclosed another kind of pwm pulse generator of the embodiment of the present application;
Fig. 3 is the structural representation of the disclosed another kind of pwm pulse generator of the embodiment of the present application;
Fig. 4 is the structural representation of the disclosed another kind of pwm pulse generator of the embodiment of the present application.
Embodiment
The embodiment of the present application provides a kind of pwm pulse generator, be applied in the saturable reactor rectifying device, be used to trigger IGBT and realize DC chopped-wave, this pulse generator comprises controller and pulse generation unit, controller control impuls generation unit produces pulse, the characteristic parameter of the pulse that can the regulating impulse generation unit be produced of controller simultaneously, described pwm pulse generator has been realized the relatively independent of pulse generation and pulse regulation, thereby has improved the interference free performance of pulse generator.This pulse generator is applied in the saturable reactor rectifying device, and the IGBT in the pulse-triggered rectifying device that this pulse generator produces finishes the copped wave function, the direct current output of the duty cycle adjustment saturable reactor rectifying device by regulating trigger impulse.
In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all should belong to the scope of the application's protection.
A kind of pwm pulse generator referring to shown in Figure 1 mainly comprises: controller 100, pulse generation unit 200,
The output of described controller 100 links to each other with the input of described pulse generation unit 200, can obtain required pulse signal at the output of described pulse generation unit 200.
During concrete enforcement, described controller 100 can be by chip microcontroller, and described pulse generation unit 200 can be realized by counter and trigger.
Because pulse generation unit 200 has memory function, after an assignment, can produce pulse signal continuously to the control word correspondence, can't operate as normal even controller 100 is interfered, pulse this moment generation unit still can continue to produce pulse signal according to the control word that receives before, thereby has improved the interference free performance of this pulse generator.
Referring to another kind of pwm pulse generator shown in Figure 2, be applied in the saturable reactor rectifying device, trigger IGBT and finish the copped wave function, mainly comprise controller 100, pulse generation unit 200.
Described pulse generation unit 200 comprises: counter unit 210 and flip-flop element 220, flip-flop element 220 comprise first trigger 221 and second trigger 222.
The output of controller 100 links to each other with the input of counter unit 210, and first output of counter unit 210 links to each other with the set end of first trigger 221 with second trigger 222;
Second output of counter unit 210, the 3rd output link to each other with the reset terminal of first trigger 221, second trigger 222 respectively.
The output of first trigger 221, second trigger 222 links to each other with first output, second output of described pulse limit for width unit 300 respectively.
Parameters such as the frequency of the pwm pulse generator generation pulse in the present embodiment, duty ratio are regulated by controller 100, described controller 100 specifically can be by chip microcontroller, single-chip microcomputer is according to the current value of described saturable reactor rectifying device output and the size of the error passing ratio between the predetermined current value-controlled amount of integral PI computing, and then calculate the count value of the characteristic parameter of required trigger impulse, be transferred to counter unit 210 by the data/address bus timesharing then.
At least include three independently counters in the described counter unit 210, the output of three counters is three outputs of corresponding counter unit 210 respectively.
When first rolling counters forward reaches corresponding preset numerical value in the counter unit 210, first output output significant level, first trigger 221 and second trigger 222 are all exported high level.
When second rolling counters forward reaches corresponding preset numerical value in the counter unit 210, second output output significant level, the output of first trigger 221 switches to low level by high level.
When the 3rd rolling counters forward reaches corresponding preset numerical value in the counter unit 210, the 3rd output output significant level, the output of second trigger 221 switches to low level by high level.
Concrete, described controller 100 can be a single-chip microcomputer, and described counter unit 210 can be a programmable counter 8254, and described first trigger 221 and second trigger 222 can be d type flip flops.Single-chip microcomputer converts the characteristic parameter of required pulse to count value and offers programmable counter 8254, include 3 independently counters in the described programmable counter 8254, counter 0, counter 1 sum counter 2, wherein, first output of counter unit 210, second output, the 3rd output are respectively the outputs of counter 0, counter 1, counter 2.
Referring to another kind of pwm pulse generator shown in Figure 3, and the difference between the pulse generator shown in Figure 2 is to increase pulse limit for width unit 300, described pulse generator mainly comprises: controller 100, pulse generation unit 200, pulse limit for width unit 300, described pulse generation unit 200 comprises counter unit 210, flip-flop element 220, flip-flop element 220 comprise first trigger 221 and second trigger 222.Described pulse limit for width unit 300 comprises the first pulse limit for width subelement 301, the second pulse limit for width subelement 302,
Annexation between controller 100, counter unit 210, first trigger 221 and second trigger 222 is identical with the annexation of pulse generator shown in Figure 2, repeats no more herein.
The output of first trigger 221 links to each other with the input of the first pulse limit for width subelement 301, and the output of second trigger 222 links to each other with the input of the second pulse limit for width subelement 302.Pulse signal after the output of the first pulse limit for width subelement 301 and the second pulse limit for width subelement 302 can obtain the two-way limit for width.
The high level that comprises predetermined width in the pulse that pulse limit for width unit 300 produces, pulse signal process that pulse signal that pulse generation unit 200 is produced and pulse limit for width unit 300 produce and output behind the door, thereby avoided because accident causes the duty ratio of pulse generation unit 200 output pulse signals unbalance, caused this pulsed circuit that passes through of back level the non-normal working situation to occur.
Concrete, pulse limit for width unit 300 can realize by monostable flipflop 74LS123 and resistance, electric capacity, the limit width of resistance regulating impulse limit for width unit 300 output pulse signals by regulating resistance.Synchronous for guaranteeing the pulse signal that the pulse signal that pulse limit for width unit is produced and first trigger and second trigger produced, the clear terminal of monostable flipflop need be connected with first output of counter unit 210.
Pwm pulse generator in the present embodiment increased pulse limit for width unit, avoided because accident causes the duty ratio of pulse signal of pulse generation unit output unbalance, thereby solved the improper situation of IGBT trigger impulse.
Referring to another kind of pwm pulse generator shown in Figure 4, the pulse generator in the present embodiment and the difference of pulse generator shown in Figure 3 are, also comprise power circuit unit 400, the output of described power circuit unit 400 provides working power respectively at each circuit unit that the power end of controller 100, pulse generation unit 200, pulse limit for width unit 300 is connected in the pulse generator.
The needed operating voltage of circuit unit in the described pulse generator comprises :+5V ,+15V ,-10V, this power circuit unit 400 converts the 24V Switching Power Supply to each circuit unit needed operating voltage respectively, specifically can realize voltage transitions by the power supply chip of LM2576 series.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each embodiment, and each embodiment stresses all is difference with other embodiment.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
The above only is the application's a embodiment; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection range.
Claims (6)
1. a pwm pulse generator is characterized in that, comprising: controller and pulse generation unit, wherein:
The input of described pulse generation unit links to each other with the output of described controller, and the output of described pulse generation unit obtains pulse signal.
2. pwm pulse generator according to claim 1 is characterized in that, also comprises: the pulse limit for width unit that links to each other with described pulse generation unit.
3. pwm pulse generator according to claim 1 and 2 is characterized in that, described controller is a single-chip microcomputer.
4. pwm pulse generator according to claim 3 is characterized in that, described pulse generation unit comprises: counter unit and flip-flop element, described flip-flop element comprise first flip-flop element and second flip-flop element, wherein:
The input of described counter unit links to each other with described controller output end as the input of described pulse generation unit;
First output of described counter unit links to each other with the set end of first trigger and second flip-flop element;
Second output of described counter unit links to each other with the reset terminal of first trigger;
The 3rd output of described counter unit links to each other with the reset terminal of second trigger;
The output of described first trigger, second trigger links to each other with first input end, second input of described pulse limit for width unit respectively.
5. pwm pulse generator according to claim 4 is characterized in that, described first flip-flop element and described second flip-flop element are d type flip flop.
6. according to each described pwm pulse generator in the claim 1,2,4 or 5, it is characterized in that, also comprise the power circuit unit, its power output end links to each other with the power end of described controller, pulse generation unit, pulse limit for width unit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010206248065U CN201893761U (en) | 2010-11-24 | 2010-11-24 | Pulse-width modulation (PWM) pulse generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206248065U CN201893761U (en) | 2010-11-24 | 2010-11-24 | Pulse-width modulation (PWM) pulse generator |
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| CN201893761U true CN201893761U (en) | 2011-07-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811745A (en) * | 2015-06-01 | 2016-07-27 | 扬州大学 | Switch tube control pulse driving method |
| CN108254749A (en) * | 2017-11-21 | 2018-07-06 | 安徽四创电子股份有限公司 | One kind can moving type weather radar beam control device |
| CN109245762A (en) * | 2018-09-28 | 2019-01-18 | 中国科学院长春光学精密机械与物理研究所 | A kind of single-channel monopulse turns the device of multichannel phase shift adjustable pulse |
| CN112534703A (en) * | 2018-08-21 | 2021-03-19 | 通用电气公司 | System and method for generating high frequency switching signals for power converters |
-
2010
- 2010-11-24 CN CN2010206248065U patent/CN201893761U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811745A (en) * | 2015-06-01 | 2016-07-27 | 扬州大学 | Switch tube control pulse driving method |
| CN105811745B (en) * | 2015-06-01 | 2019-03-01 | 扬州大学 | A kind of driving method of switch controlled pulse |
| CN108254749A (en) * | 2017-11-21 | 2018-07-06 | 安徽四创电子股份有限公司 | One kind can moving type weather radar beam control device |
| CN112534703A (en) * | 2018-08-21 | 2021-03-19 | 通用电气公司 | System and method for generating high frequency switching signals for power converters |
| CN112534703B (en) * | 2018-08-21 | 2024-05-24 | 通用电气可再生能源西班牙有限公司 | System and method for generating high frequency switching signals for a power converter |
| CN109245762A (en) * | 2018-09-28 | 2019-01-18 | 中国科学院长春光学精密机械与物理研究所 | A kind of single-channel monopulse turns the device of multichannel phase shift adjustable pulse |
| CN109245762B (en) * | 2018-09-28 | 2021-08-03 | 中国科学院长春光学精密机械与物理研究所 | Device for converting single-path single pulse into multi-path phase-shift adjustable pulse |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20111124 |