CN103825441A - Power supply parallel low-ripple output control method - Google Patents
Power supply parallel low-ripple output control method Download PDFInfo
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- CN103825441A CN103825441A CN201410093202.5A CN201410093202A CN103825441A CN 103825441 A CN103825441 A CN 103825441A CN 201410093202 A CN201410093202 A CN 201410093202A CN 103825441 A CN103825441 A CN 103825441A
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Abstract
The invention discloses a power supply parallel low-ripple output control method. The method is used for controlling a parallel power supply which is formed by parallel connection of n power supply modules and controlling differing phases of excitation pulse signals of two adjacent power supply modules. According to the power supply parallel low-ripple output control method, by differing the phases of the excitation pulse signals of each power supply module in the parallel powder supply, phases of ripples generated by each power supply module are differed, and therefore, ripple waves generated by each power supply module are not overlapped, ripples of the parallel power supply are reduced, output stability is increased, and output quality is guaranteed.
Description
Technical field
The present invention relates to power technique fields, particularly a kind of power supply low ripple output control method in parallel.
Background technology
The output stage of direct-current switch power supply connects LC filter circuit conventionally, and the electric current in inductance L can fluctuate up and down at the effective value of output current, therefore the electric current of capacitor C also fluctuates, produces and the ripple of Switching Power Supply same frequency at output.Parallel power work efficiency is high, and power capacity is large, and therefore parallel power supply is widely used in modern industry field.But in now current application, only that multiple power modules are simply composed in parallel to parallel power supply, the excitation pulse signal of each power module is identical, and (frequency is identical, phase place is identical) ripple that therefore each power module produces can superpose, the output ripple of parallel power supply is increased, weaken the output stability of parallel power supply, finally reduced the output quality of parallel power supply, affected industrial production.
Summary of the invention
The object of the invention is to overcome the larger deficiency of existing parallel connection power supply output ripple in prior art, provide a kind of power supply low ripple output control method in parallel, reduce the output ripple of parallel connection power supply by the method, ensure output stability.
In order to realize foregoing invention object, the invention provides following technical scheme:
Power supply low ripple output control method in parallel, for controlling the parallel connection power supply being composed in parallel by n power module, controls the phase phasic difference of the excitation pulse signal of every adjacent two power modules
.
According to the embodiment of the present invention, by phase difference be
excitation pulse signal generating circuit realize the phase phasic difference of the excitation pulse signal of controlling every adjacent two power modules
, described excitation pulse signal generating circuit comprises timing oscillator, and described timing oscillator connects frequency divider, and described frequency divider connects pulse width modulator; Described timing oscillator produces the first clock signal of setpoint frequency, and the first clock signal is carried out n frequency division by described frequency divider, is divided into n road phase place and differs respectively
second clock signal, described pulse width modulator differs n road phase place respectively respectively
second clock signal carry out pulse-width modulation, be treated to n road phase place and differ respectively
excitation pulse signal.
compared with prior art, beneficial effect of the present invention: power supply of the present invention low ripple output control method in parallel, by controlling the phase phasic difference of the excitation pulse signal of each power module in parallel connection power supply
, the ripple phase phasic difference that each power module is produced
, the ripple that each power module produces thus can not superpose, and has reduced the ripple of parallel connection power supply, has improved output stability, has ensured output quality.
Accompanying drawing explanation:
Fig. 1 is parallel connection power supply structure composition schematic diagram.
Fig. 2 is that phase difference is
excitation pulse signal generating circuit schematic diagram.
Fig. 3 is each power module of forming parallel connection power supply in prior art ripple by identical excitation pulse signal triggering for generating.
Fig. 4 is the ripple that the parallel connection power supply under the inventive method control produces.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
With reference to figure 1, n power module composes in parallel parallel connection power supply.Power supply provided by the invention low ripple output control method in parallel is, for each power module provides misphase respectively
excitation pulse signal, that is to say the phase phasic difference of the excitation pulse signal of every adjacent two power modules
.Phase phasic difference
n road excitation pulse signal export respectively pulse width modulation module (module # control) in figure to, pulse width modulation module sends respectively phase phasic difference
pulse-width signal, the each power module of pulse-width signal control output direct current.
Can take two kinds of modes to realize the phase phasic difference of the excitation pulse signal of every two adjacent power modules
.A kind of mode is to utilize FPGA or CPLD as signal generator, and in FPGA or CPLD, integrated phase is poor is
excitation pulse signal generating circuit, make to form the phase phasic difference of the excitation pulse signal of every adjacent two power modules in each power module of parallel connection power supply
.Another kind of mode is that the hardware circuit by being made up of components and parts is realized, and sets up phase difference to be
excitation pulse signal generating circuit.
With reference to figure 2, the phase difference that the present embodiment is enumerated is
excitation pulse signal generating circuit comprise, timing oscillator, timing oscillator connects frequency divider, frequency divider connects pulse-width modulation (PWM) device.According to the direct current output frequency requirement of parallel connection power supply, timing oscillator produces the first clock signal of corresponding frequencies, exports frequency divider to.The first clock signal is carried out n frequency division by frequency divider, is divided into n road phase place and differs respectively
second clock signal, export pulse width modulator to.Pulse width modulator differs n road phase place respectively respectively
second clock signal carry out pulse-width modulation, be treated to n road phase place and differ respectively
excitation pulse signal.Phase difference is
excitation pulse signal generating circuit connect n power module in parallel connection power supply, phase difference is
excitation pulse signal trigger each power module output direct current.
With reference to figure 3, Fig. 4, Fig. 3 is each power module of forming parallel connection power supply in prior art ripple by identical excitation pulse signal triggering for generating, and Fig. 4 is the ripple that the parallel connection power supply under the inventive method control produces.As shown in Figure 4, due to the phase phasic difference of the excitation pulse signal of the each power module in parallel connection power supply
, the ripple phase place that each power module is produced also differs
, the ripple that each power module produces thus can not superpose, and has reduced the ripple of parallel connection power supply, has improved output stability, has ensured output quality.
Disclosed all features in this specification, except mutually exclusive feature and/or step, all can combine by any way.Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
Claims (2)
1. power supply low ripple output control method in parallel, for controlling the parallel connection power supply being composed in parallel by n power module, is characterized in that, controls the phase phasic difference of the excitation pulse signal of every adjacent two power modules
.
2. power supply according to claim 1 low ripple output control method in parallel, is characterized in that, by phase difference is
excitation pulse signal generating circuit realize the phase phasic difference of the excitation pulse signal of controlling every adjacent two power modules
, described excitation pulse signal generating circuit comprises timing oscillator, and described timing oscillator connects frequency divider, and described frequency divider connects pulse width modulator; Described timing oscillator produces the first clock signal of setpoint frequency, and the first clock signal is carried out n frequency division by described frequency divider, is divided into n road phase place and differs respectively
second clock signal, described pulse width modulator differs n road phase place respectively respectively
second clock signal carry out pulse-width modulation, be treated to n road phase place and differ respectively
excitation pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093202.5A CN103825441A (en) | 2014-03-14 | 2014-03-14 | Power supply parallel low-ripple output control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093202.5A CN103825441A (en) | 2014-03-14 | 2014-03-14 | Power supply parallel low-ripple output control method |
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| CN103825441A true CN103825441A (en) | 2014-05-28 |
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|---|---|---|---|
| CN201410093202.5A Pending CN103825441A (en) | 2014-03-14 | 2014-03-14 | Power supply parallel low-ripple output control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578733A (en) * | 2015-02-04 | 2015-04-29 | 四川英杰电气股份有限公司 | Low ripple output method of tandem high-voltage DC power source |
| CN109327023A (en) * | 2017-07-31 | 2019-02-12 | 许继集团有限公司 | A kind of DC/DC parallel running output adjusting method and its system |
| CN111342444A (en) * | 2020-04-03 | 2020-06-26 | 西安清泰科新能源技术有限责任公司 | Switch ripple circulating current suppression device and method of DC power supply system |
| WO2022252208A1 (en) * | 2021-06-04 | 2022-12-08 | 华为数字能源技术有限公司 | Power source system and power source system control method |
Citations (2)
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|---|---|---|---|---|
| US7839664B2 (en) * | 2007-12-11 | 2010-11-23 | Switching Power, Inc. | AC to DC power supply having zero frequency harmonic contents in 3-phase power-factor-corrected output ripple |
| CN103580476A (en) * | 2013-11-18 | 2014-02-12 | 东南大学 | Electric energy conversion device and method for determining optimal parallel connection number of direct-current circuits of electric energy conversion device |
-
2014
- 2014-03-14 CN CN201410093202.5A patent/CN103825441A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7839664B2 (en) * | 2007-12-11 | 2010-11-23 | Switching Power, Inc. | AC to DC power supply having zero frequency harmonic contents in 3-phase power-factor-corrected output ripple |
| CN103580476A (en) * | 2013-11-18 | 2014-02-12 | 东南大学 | Electric energy conversion device and method for determining optimal parallel connection number of direct-current circuits of electric energy conversion device |
Non-Patent Citations (1)
| Title |
|---|
| 吕富勇等: "模块化高精度大功率高压电源并联技术", 《高电压技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578733A (en) * | 2015-02-04 | 2015-04-29 | 四川英杰电气股份有限公司 | Low ripple output method of tandem high-voltage DC power source |
| CN109327023A (en) * | 2017-07-31 | 2019-02-12 | 许继集团有限公司 | A kind of DC/DC parallel running output adjusting method and its system |
| CN109327023B (en) * | 2017-07-31 | 2021-06-08 | 许继集团有限公司 | DC/DC parallel operation output adjusting method and system thereof |
| CN111342444A (en) * | 2020-04-03 | 2020-06-26 | 西安清泰科新能源技术有限责任公司 | Switch ripple circulating current suppression device and method of DC power supply system |
| CN111342444B (en) * | 2020-04-03 | 2024-03-19 | 西安清泰科新能源技术有限责任公司 | Switching ripple circulation suppression device and method for DC power supply system |
| WO2022252208A1 (en) * | 2021-06-04 | 2022-12-08 | 华为数字能源技术有限公司 | Power source system and power source system control method |
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Application publication date: 20140528 |
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