CN102751853A - Novel method for generating push-pull PWM (pulse width modulation) signal of digital power supply - Google Patents
Novel method for generating push-pull PWM (pulse width modulation) signal of digital power supply Download PDFInfo
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- CN102751853A CN102751853A CN2012102679732A CN201210267973A CN102751853A CN 102751853 A CN102751853 A CN 102751853A CN 2012102679732 A CN2012102679732 A CN 2012102679732A CN 201210267973 A CN201210267973 A CN 201210267973A CN 102751853 A CN102751853 A CN 102751853A
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Abstract
The invention discloses a novel method for generating a push-pull PWM (pulse width modulation) signal of a digital power supply. The novel method is a scheme designed for lots of single chips with PWM modules. Two complementary PWM signals can be generated by the single chip, and dead time can be adjusted, but the push-pull PWM signal for a push-pull circuit cannot be generated. Due to the method, the push-pull PWM signal can be generated by the single chip. The method is characterized by comprising the following steps: firstly, generating two complementary PWM signals; secondly, setting the duty ratio of the two complementary PWM signals to be 50% so as to obtain two push-pull PWM signals with the duty ratio of 50%; and thirdly, enabling the duty ratio of the push-pull PWM signals to change in a range of 0-50% through adjusting the dead time.
Description
Affiliated technical field:
In Power Electronic Circuit, the method for PWM (pulse width modulation pulse width modulation) signal is recommended in a kind of generation.
Background technology:
In Power Electronic Circuit, digital power is the focus and the trend of research recently, also is very general with Single-chip Controlling.The single-chip microcomputer that much contains the PWM module can't produce push-pull circuit required recommend pwm signal, but it is adjustable to produce two-way complementary pwm signal and Dead Time.The present invention can let forenamed single-chip microcomputer produce push-pull circuit required recommend pwm signal.Wherein, the pwm signal of recommending that the present invention carried is meant that the two-way cycle is identical, and duty ratio equates, the pwm signal in phase place phase difference of half cycle is as shown in Figure 2; The complementary pwm signal of two-way is meant that the cycle of this two-way pwm signal is identical, and the signal level opposite states is as shown in Figure 1 at any time; Dead Time is meant that pwm signal should be at t
1Constantly from the low transition to the high level (high level is effective), but in fact through behind one section delay time, at t
2Constantly from the low transition to the high level, this section delay time t
d=t
2-t
1Be exactly Dead Time, as shown in Figure 3.
Summary of the invention:
In digital power control field, the single-chip microcomputer that much contains the PWM module can't produce push-pull circuit required recommend pwm signal, but it is adjustable to produce two-way complementary pwm signal and Dead Time.Recommend pwm signal in order to let aforesaid single-chip microcomputer produce, the present invention proposes a kind of production method of recommending pwm signal of digital power of novelty.
Technical scheme:
In digital power control field, the single-chip microcomputer that much contains the PWM module can't produce push-pull circuit required recommend pwm signal, but it is adjustable to produce two-way complementary pwm signal and Dead Time.The present invention lets foregoing single-chip microcomputer produce a kind of novel scheme of the required pwm signal of push-pull circuit.The concrete steps of this scheme are: the complementary pwm signal of PWM module output two-way that the first, makes single-chip microcomputer; The second, the duty ratio that the complementary pwm signal of two-way is set is 50%, has so just become the pwm signal of complementation and has recommended pwm signal, and the pwm signal duty ratio of recommending at this moment is 50%; Three, through regulating Dead Time the duty ratio of recommending pwm signal is changed between 0～50%, thereby obtain the desired pwm signal of recommending.It is 50% that core of the present invention is to be provided with the complementary pwm signal duty ratio of two-way,, make it to become duty ratio and be 50% the pwm signal of recommending, through regulating Dead Time the duty ratio of recommending pwm signal is changed between 0～50% again.
Beneficial effect of the present invention:
In digital power control field, the single-chip microcomputer that much contains the PWM module can't produce push-pull circuit required recommend pwm signal, but it is adjustable to produce two-way complementary pwm signal and Dead Time.The present invention lets foregoing single-chip microcomputer produce a kind of novel scheme of the required pwm signal of push-pull circuit.This scheme is practical requirement both, and is succinct again economical.
Description of drawings:
Fig. 1 is the oscillogram of the complementary pwm signal of two-way.
Fig. 2 is the oscillogram of recommending pwm signal.
Fig. 3 is the oscillogram of Dead Time.
Embodiment:
Below in conjunction with the PIC16F616 single-chip microcomputer implementation method of the present invention is described.
PIC16F616 has the PWM module, and Dead Time is adjustable.Below be provided with and can let the output of PIC16F616 single-chip microcomputer the two-way cycle be 40us, duty ratio is the adjustable pwm signal of recommending between 0～50%.Its concrete embodiment is: the first step is that 0x8c selects half-bridge mode through register CCP1CON is set in the PWM module that PIC16F616 carries, the complementary pwm signal of output two-way; In second step, it is 119 that register PR2 is set, and CCPR1L is 60, and the cycle that makes the two-way complementary PWM signals is 40us, and duty ratio is 50%, and such signal also is that the two-way duty ratio is 50% the pwm signal of recommending; The 3rd step, adjust Dead Time through the value that changes register PWM1CON, thereby the required duty ratio of output push-pull circuit between 0～50%, change recommend pwm signal.The duty ratio that core point of the present invention is to be provided with the complementary pwm signal of two-way is 50%, again through regulate Dead Time export push-pull circuit required recommend pwm signal.
Claims (3)
1. the digital power of a novelty recommends the pwm signal production method; It is characterized in that: it is 50% that the complementary pwm signal duty ratio of two-way is set;, make it to become duty ratio and be 50% the pwm signal of recommending, through regulating Dead Time the duty ratio of recommending pwm signal is changed between 0～50% again.
2. the pwm signal production method of recommending according to claim 1 is characterized in that: the duty ratio that the complementary pwm signal of two-way is set is 50%, and so just having become duty ratio to the pwm signal of complementation is 50% the pwm signal of recommending.
3. the pwm signal production method of recommending according to claim 1; It is characterized in that: through regulating Dead Time the duty ratio of recommending pwm signal is changed between 0～50%, thereby obtain the pwm signal of recommending that desired duty ratio changes between 0～50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267973.2A CN102751853B (en) | 2012-07-31 | 2012-07-31 | A kind of novel digital power recommends pwm signal generation circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267973.2A CN102751853B (en) | 2012-07-31 | 2012-07-31 | A kind of novel digital power recommends pwm signal generation circuit |
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| CN102751853A true CN102751853A (en) | 2012-10-24 |
| CN102751853B CN102751853B (en) | 2017-09-05 |
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| CN201210267973.2A Expired - Fee Related CN102751853B (en) | 2012-07-31 | 2012-07-31 | A kind of novel digital power recommends pwm signal generation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098239A (en) * | 2021-03-30 | 2021-07-09 | 深圳市雷能混合集成电路有限公司 | Control method and device of digital power supply |
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| CN101420189A (en) * | 2008-12-04 | 2009-04-29 | 南通大学 | Ultrasonic motor controlling integrated circuit based on voltage controlled oscillator |
| CN101640526A (en) * | 2009-08-19 | 2010-02-03 | 广州金升阳科技有限公司 | IGBT driving circuit embedded with isolating source |
| US20110203779A1 (en) * | 2008-02-15 | 2011-08-25 | Warwick Graham Andrew Dawes | Uninterruptible cooling system and apparatus |
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Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092610A (en) * | 1977-02-17 | 1978-05-30 | Raytheon Company | Modulated carrier amplifying system |
| US4348621A (en) * | 1980-01-08 | 1982-09-07 | Danfoss A/S | Control circuit for a multi-phase load |
| US5510974A (en) * | 1993-12-28 | 1996-04-23 | Philips Electronics North America Corporation | High frequency push-pull converter with input power factor correction |
| CN2458814Y (en) * | 2000-12-12 | 2001-11-07 | 北京通力环电气有限公司 | Full-bridge phase-shift drive |
| CN101019317A (en) * | 2004-08-23 | 2007-08-15 | 密克罗奇普技术公司 | Digital processor with pulse width modulation module having dynamically adjustable phase offset capability, high speed operation and simultaneous update of multiple pulse width modulation duty cycle r |
| JP2007088926A (en) * | 2005-09-22 | 2007-04-05 | Victor Co Of Japan Ltd | D-class amplifier |
| JP2008172323A (en) * | 2007-01-09 | 2008-07-24 | Nec Electronics Corp | Dead time control circuit |
| CN101388603A (en) * | 2007-09-11 | 2009-03-18 | 华为技术有限公司 | Method and apparatus for regulating power source voltage |
| US20110203779A1 (en) * | 2008-02-15 | 2011-08-25 | Warwick Graham Andrew Dawes | Uninterruptible cooling system and apparatus |
| CN101373937A (en) * | 2008-10-08 | 2009-02-25 | 南京航空航天大学 | Ultrasound motor drive controller based on embedded system level chip |
| CN101420189A (en) * | 2008-12-04 | 2009-04-29 | 南通大学 | Ultrasonic motor controlling integrated circuit based on voltage controlled oscillator |
| CN101640526A (en) * | 2009-08-19 | 2010-02-03 | 广州金升阳科技有限公司 | IGBT driving circuit embedded with isolating source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113098239A (en) * | 2021-03-30 | 2021-07-09 | 深圳市雷能混合集成电路有限公司 | Control method and device of digital power supply |
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| CN102751853B (en) | 2017-09-05 |
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Address after: 430068 School of electrical and electronic engineering, Hubei University of Technology, 28, South Hongshan, Wuhan, Hubei Applicant after: Hubei Industry University Address before: 430064 School of electrical and electronic engineering, Hubei University of Technology, Wuhan 1, Hubei, Hongshan Province Applicant before: Hubei Industry University Applicant before: Wang Chao |
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