CN104811168A - Dual-duty-ratio switching pulse width modulator driving method - Google Patents
Dual-duty-ratio switching pulse width modulator driving method Download PDFInfo
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- CN104811168A CN104811168A CN201510077978.2A CN201510077978A CN104811168A CN 104811168 A CN104811168 A CN 104811168A CN 201510077978 A CN201510077978 A CN 201510077978A CN 104811168 A CN104811168 A CN 104811168A
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Abstract
The invention discloses a dual-duty-ratio switching pulse width modulator driving method, which comprises the steps 1, carrying out system initialization; 2, configuring a PWM module, wherein the switching frequency f1 of a PWM1 is 1-5kHz, the duty ratio D1 of the PWM1 is 75-90%, the switching frequency f2 of a PWM2 is 1-5kHz and the duty ratio of the PWM2 is 45-65%; and 3, controlling a pin to output high level when the driving circuit is at a driving-maintaining state, wherein the PWM module outputs the PWM1 when the driving circuit drives and the PWM module outputs the PWM2 when the driving circuit maintains, controlling the pin to output low level with the driving circuit exits driving, and executing the step 3 in a circulation mode. The method disclosed by the invention solves a problem that an existing driving method is poor in energy efficiency and low in comprehensive benefit and influences the service life of relevant devices when completing a driving function.
Description
Technical field
The present invention relates to driving method, particularly relate to the pulse width modulator driving method that a kind of pair of duty ratio switches.
Background technology
In electromagnetic load drives, the magnetic resistance due to magnetic circuit can produce and change significantly in transpose process.Therefore, such load just has the monopolizing characteristic being obviously different from other loads---and driving and the electrical quantity required for maintenance state exist significantly different, and usual driving method does not consider the social value that this characteristic has.But the potentiality of this value are but of great advantage to the raising of efficiency.
Summary of the invention
In view of this, the object of the invention is for the deficiencies in the prior art, the pulse width modulator driving method that a kind of pair of duty ratio switches is provided, solve existing driving method when completing driving function, there is efficiency not good, comprehensive benefit is unexcellent, the problem in the useful life of the relevant components and parts of impact.
For achieving the above object, the present invention by the following technical solutions:
The pulse width modulator driving method that pair duty ratio switches, wherein, comprises the steps:
Step 1, system initialization;
Step 2, configuration PWM module is: PWM1:f1=1-5kHz, D1=75-90%; PWM2:f2=1-5kHz, D2=45-65%;
Step 3, the operating state of query driven circuit, when drive circuit is when driving-maintaining state, controls pin and exports high level; During driving, PWM module exports PWM1; During maintenance, PWM module exports PWM2; When exiting driving, control pin output low level; Circulation performs step 3.
As preferably, the D1 of described step 2 is 85%.
As preferably, the D2 of described step 2 is 55%.
As preferably, the f1 of described step 2 is 1kHz.
As preferably, the f2 of described step 2 is 1kHz.
The beneficial effect of the invention is:
The present invention is directed in electromagnetic load drives, such load just has the monopolizing characteristic being obviously different from other loads---and driving and the electrical quantity required for maintenance state exist significantly different, adopt the pulse width modulator driving method that two duty ratio switches, two duty ratio PWM exports stand-by simultaneously, time delay and the switching of high low duty ratio are completed by hardware, the driving method usual with routine compares and produces following effect: improve efficiency, reduces heating, improves the useful life of effect components and parts.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes following steps:
Step 001, system initialization;
Step 002, configuration PWM module is: PWM1:f1=1-5kHz, D1=75-90%(f1 and D1 refer to switching frequency and the duty ratio of PWM1 respectively); PWM2:f2=1-5kHz, D2=45-65%(f2 and D2 refer to switching frequency and the duty ratio of PWM2 respectively).The value of f1, f2, D1, D2 all can be adjusted to reach optimal effectiveness according to working control object.
Step 003, the operating state of query driven circuit, when drive circuit is when driving-maintaining state (refer to driving condition, drive to maintenance transition status and maintenance state), (during driving, PWM module exports PWM1 to control pin output high level; During maintenance, PWM module exports PWM2); When exiting driving, control pin output low level; Circulation performs step 3.
The detailed process of step 003: this step describes the specific practice realizing driving method, can realize as long as corresponding control pin is exported high level by described driving-maintenance state; Exit driving condition as long as described corresponding control pin output low level can be realized.
Embodiment 1:
The present embodiment comprises the steps:
Step 001, system initialization;
Step 002, configuration PWM module is: PWM1:f1=1kHz, D1=85%; PWM2:f2=1kHz, D2=55%;
Step 003, the operating state of query driven circuit, when drive circuit is when driving-maintaining state (refer to driving condition, drive to maintenance transition status and maintenance state), (during driving, PWM module exports PWM1 to control pin output high level; During maintenance, PWM module exports PWM2); When exiting driving, control pin output low level; Circulation performs step 3.
Of the present invention couple of duty ratio PWM exports stand-by simultaneously, and time delay and the switching of high low duty ratio are completed by hardware, improve efficiency, reduce heating, improve the useful life of effect components and parts simultaneously.The time delay of high low duty ratio realizes the charging of electric capacity by resistance, also can be realized by other hardware time-delay methods.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those skilled in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a pulse width modulator driving method for two duty ratio switching, is characterized in that: comprise the steps:
Step 1, system initialization;
Step 2, configuration PWM module is: PWM1:f1=1-5kHz, D1=75-90%; PWM2:f2=1-5kHz, D2=45-65%;
Step 3, the operating state of query driven circuit, when drive circuit is when driving-maintaining state, controls pin and exports high level; During driving, PWM module exports PWM1; During maintenance, PWM module exports PWM2; When exiting driving, control pin output low level; Circulation performs step 3.
2. the pulse width modulator driving method of a kind of pair of duty ratio switching according to claim 1, is characterized in that: the D1 of described step 2 is 85%.
3. the pulse width modulator driving method of a kind of pair of duty ratio switching according to claim 2, is characterized in that: the D2 of described step 2 is 55%.
4. the pulse width modulator driving method of a kind of pair of duty ratio switching according to claim 3, is characterized in that: the f1 of described step 2 is 1kHz.
5. the pulse width modulator driving method of a kind of pair of duty ratio switching according to claim 4, is characterized in that: the f2 of described step 2 is 1kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077978.2A CN104811168A (en) | 2015-02-14 | 2015-02-14 | Dual-duty-ratio switching pulse width modulator driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077978.2A CN104811168A (en) | 2015-02-14 | 2015-02-14 | Dual-duty-ratio switching pulse width modulator driving method |
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| CN104811168A true CN104811168A (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510077978.2A Pending CN104811168A (en) | 2015-02-14 | 2015-02-14 | Dual-duty-ratio switching pulse width modulator driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010657A (en) * | 2016-11-02 | 2018-05-08 | 佛山市顺德区美的电热电器制造有限公司 | The drive control method and apparatus of household electrical appliance and electromagnet for household electrical appliance |
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| US6400232B1 (en) * | 2000-05-10 | 2002-06-04 | Delphi Technologies, Inc. | Variable duty cycle oscillator circuit with fixed minimum and maximum duty cycles |
| CN1567703A (en) * | 2003-07-01 | 2005-01-19 | 达隆科技股份有限公司 | Control method of multiple PWM for fan |
| CN101361260A (en) * | 2006-08-30 | 2009-02-04 | 罗姆股份有限公司 | Motor drive circuit, drive method, and motor unit and electronic device using the motor unit |
| CN101503060A (en) * | 2009-01-23 | 2009-08-12 | 西安智源电气有限公司 | Heavy truck electric appliance load driving device based on PWM control |
| CN102437806A (en) * | 2010-09-27 | 2012-05-02 | 安森美半导体贸易公司 | Startup control circuit of drive circuit |
| US20130069702A1 (en) * | 2011-09-15 | 2013-03-21 | Semiconductor Components Industries, Llc | Pwm signal output circuit |
| US20150028840A1 (en) * | 2012-01-31 | 2015-01-29 | Continental Automotive Gmbh | Control of an inductive load by pulse width modulation |
| CN104344055A (en) * | 2014-09-16 | 2015-02-11 | 三一重机有限公司 | Proportional electromagnetic valve driving method and system based on PWM (Pulse Width Modulation) |
-
2015
- 2015-02-14 CN CN201510077978.2A patent/CN104811168A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6400232B1 (en) * | 2000-05-10 | 2002-06-04 | Delphi Technologies, Inc. | Variable duty cycle oscillator circuit with fixed minimum and maximum duty cycles |
| CN1567703A (en) * | 2003-07-01 | 2005-01-19 | 达隆科技股份有限公司 | Control method of multiple PWM for fan |
| CN101361260A (en) * | 2006-08-30 | 2009-02-04 | 罗姆股份有限公司 | Motor drive circuit, drive method, and motor unit and electronic device using the motor unit |
| CN101503060A (en) * | 2009-01-23 | 2009-08-12 | 西安智源电气有限公司 | Heavy truck electric appliance load driving device based on PWM control |
| CN102437806A (en) * | 2010-09-27 | 2012-05-02 | 安森美半导体贸易公司 | Startup control circuit of drive circuit |
| US20130069702A1 (en) * | 2011-09-15 | 2013-03-21 | Semiconductor Components Industries, Llc | Pwm signal output circuit |
| US20150028840A1 (en) * | 2012-01-31 | 2015-01-29 | Continental Automotive Gmbh | Control of an inductive load by pulse width modulation |
| CN104344055A (en) * | 2014-09-16 | 2015-02-11 | 三一重机有限公司 | Proportional electromagnetic valve driving method and system based on PWM (Pulse Width Modulation) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010657A (en) * | 2016-11-02 | 2018-05-08 | 佛山市顺德区美的电热电器制造有限公司 | The drive control method and apparatus of household electrical appliance and electromagnet for household electrical appliance |
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Application publication date: 20150729 |
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| RJ01 | Rejection of invention patent application after publication |