CN109194108A - A kind of variable-frequency power sources output short circuit protection control method - Google Patents
A kind of variable-frequency power sources output short circuit protection control method Download PDFInfo
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- CN109194108A CN109194108A CN201811388570.7A CN201811388570A CN109194108A CN 109194108 A CN109194108 A CN 109194108A CN 201811388570 A CN201811388570 A CN 201811388570A CN 109194108 A CN109194108 A CN 109194108A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The invention discloses a kind of variable-frequency power sources output short circuit protection control methods, including sine wave signal conditioning circuit and short-circuit conditioning circuit, in sine wave signal conditioning circuit, introduce short-circuit conditioning circuit, the short circuit conditioning circuit includes resistance, potentiometer, three end diodes and chip, the resistance of the short circuit conditioning circuit input terminal is set as R1, the output end of the R1 is equipped with UIA voltage follower circuit, the resistance of the UIA voltage follower circuit output end is set as R2, the output end of the R2 is equipped with UIB voltage follower circuit, the input terminal of UIB voltage follower circuit access double limiting circuit also in parallel.The present invention passes through in sine wave signal conditioning circuit, introduce short-circuit conditioning circuit, it has no requirement to variable-frequency power sources load equipment short-circuit conditions, any occasion suitable for variable-frequency power sources powered operation, it can be all carried out in the case where any possible short circuit using improving the reliability and adaptability of variable-frequency power sources.
Description
Technical field
The present invention relates to variable-frequency power sources control technology field, in particular to a kind of variable-frequency power sources output short circuit protection controlling party
Method.
Background technique
Variable-frequency power sources short-circuit protection currently on the market is mainly IGBT driving overcurrent protection.He is mainly outlet device tune
Try aging power supply, import equipment power supply；When variable-frequency power sources power supply to the device, load is set may be due to artificial origin's wiring error
Short circuit or load equipment internal abnormality short circuit；When variable-frequency power sources load equipment short circuit, if variable-frequency power sources equipment cannot can
By protection, very serious consequence will cause to load equipment, variable-frequency power sources equipment itself is also possible to damage；Existing variable-frequency power sources
Mostly IGBT drives overcurrent protection, it is difficult to which 100% plays the requirement of short-circuit protection.
Therefore, it is necessary to solve the above problems to invent a kind of variable-frequency power sources output short circuit protection control method.
Summary of the invention
The purpose of the present invention is to provide a kind of variable-frequency power sources output short circuit protection control methods, by sine wave signal
In conditioning circuit, short-circuit conditioning circuit is introduced, is had no requirement to variable-frequency power sources load equipment short-circuit conditions, frequency conversion is suitable for
Any occasion of power supply power supply work can be all carried out in the case where any possible short circuit using improve variable-frequency power sources can
By property and adaptability, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of variable-frequency power sources output short circuit protection controlling party
Method, including sine wave signal conditioning circuit and short-circuit conditioning circuit introduce short circuit conditioning electricity in sine wave signal conditioning circuit
Road, the short circuit conditioning circuit includes resistance, potentiometer, three end diodes and chip, the short circuit conditioning circuit input terminal
Resistance is set as R1, and the output end of the R1 is equipped with UIA voltage follower circuit, the electricity of the UIA voltage follower circuit output end
Resistance is set as R2, and the output end of the R2 is equipped with UIB voltage follower circuit, and the input terminal of the UIB voltage follower circuit is also simultaneously
Couple into double limiting circuit；
The given sine wave signal SIN that the R1 input terminal input variable-frequency power sources control occurs；
The UIA voltage follower circuit output end exports sine wave signal SIN-QW；
The UIB voltage follower circuit output end exports sine wave signal SIN-OUT；
The double limiting circuit includes UIC voltage follower circuit, UID negater circuit and RP1, the UIC voltage follower circuit,
UID negater circuit and RP1 series connection；
The RP1 input terminal input direct-current level signal adjusts RP1, an available DC level signal QW；
The DC level signal QW is transmitted in U1C voltage follower circuit, converted to obtain DC level signal QW+；
The DC level signal QW+ is transmitted in UID negater circuit, converted to obtain DC level signal QW-；
Wherein, specifically comprise the following steps:
Step 1, practical debugging is tested during variable-frequency power sources, when output voltage reaches rated value, sine wave signal SIN width
It is worth size, can be with output loading size variation, it is completely the same that amplitude changes step；
Step 2, by adjusting RP1, can make output electric current exist when output load current reaches design current maximum value
The 1 boundary's point reduced, at this point, the output maximum current of variable-frequency power sources is limited, maximum current is design current maximum value；
Step 3, when there is short circuit phenomenon at load equipment end, the controlled current flow of variable-frequency power sources output is design current maximum value,
It will not increase.
Preferably, the DC level signal QW is the DC level signal of 0-10V/DC.
Preferably, the DC level signal QW+ amplitude size is equal to DC level signal QW, and is all positive signal.
Preferably, the Ω value of the potentiometer is 10K.
Technical effect and advantage of the invention: the present invention is by sine wave signal conditioning circuit, introducing short circuit conditioning
Circuit has no requirement to variable-frequency power sources load equipment short-circuit conditions, suitable for any occasion of variable-frequency power sources powered operation,
It can be all carried out in the case where any possible short circuit using improving the reliability and adaptability of variable-frequency power sources.
Detailed description of the invention
Fig. 1 is electrical block diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
A kind of variable-frequency power sources output short circuit protection control method as shown in Figure 1, including sine wave signal conditioning circuit and short circuit
Conditioning circuit introduces short-circuit conditioning circuit, the short circuit conditioning circuit includes resistance, electricity in sine wave signal conditioning circuit
Position device, three end diodes and chip, the Ω value of the potentiometer are 10K, the resistance setting of the short circuit conditioning circuit input terminal
Output end for R1, the R1 is equipped with UIA voltage follower circuit, and the resistance of the UIA voltage follower circuit output end is set as
The output end of R2, the R2 are equipped with UIB voltage follower circuit, and the access also in parallel of the input terminal of the UIB voltage follower circuit is double
To amplitude limiter circuit；
The given sine wave signal SIN that the R1 input terminal input variable-frequency power sources control occurs；
The UIA voltage follower circuit output end exports sine wave signal SIN-QW；
The UIB voltage follower circuit output end exports sine wave signal SIN-OUT；
The double limiting circuit includes UIC voltage follower circuit, UID negater circuit and RP1, the UIC voltage follower circuit,
UID negater circuit and RP1 series connection；
The RP1 input terminal input direct-current level signal adjusts RP1, an available DC level signal QW, wherein straight
Flow the DC level signal that level signal QW is 0V/DC；
The DC level signal QW is transmitted in U1C voltage follower circuit, converted to obtain DC level signal QW+, described
DC level signal QW+ amplitude size is equal to DC level signal QW, and is all positive signal；
The DC level signal QW+ is transmitted in UID negater circuit, converted to obtain DC level signal QW-, the direct current
Level signal QW- amplitude size is equal to DC level signal QW, and is negative signal；
Wherein, specifically comprise the following steps:
Step 1, practical debugging is tested during variable-frequency power sources, when output voltage reaches rated value, sine wave signal SIN width
It is worth size, can be with output loading size variation, it is completely the same that amplitude changes step；
Step 2, by adjusting RP1, can make output electric current exist when output load current reaches design current maximum value
The 1 boundary's point reduced, at this point, the output maximum current of variable-frequency power sources is limited, maximum current is design current maximum value；
Step 3, when there is short circuit phenomenon at load equipment end, the controlled current flow of variable-frequency power sources output is design current maximum value,
It will not increase.
Embodiment 2
A kind of variable-frequency power sources output short circuit protection control method as shown in Figure 1, including sine wave signal conditioning circuit and short circuit
Conditioning circuit introduces short-circuit conditioning circuit, the short circuit conditioning circuit includes resistance, electricity in sine wave signal conditioning circuit
Position device, three end diodes and chip, the Ω value of the potentiometer are 10K, the resistance setting of the short circuit conditioning circuit input terminal
Output end for R1, the R1 is equipped with UIA voltage follower circuit, and the resistance of the UIA voltage follower circuit output end is set as
The output end of R2, the R2 are equipped with UIB voltage follower circuit, and the access also in parallel of the input terminal of the UIB voltage follower circuit is double
To amplitude limiter circuit；
The given sine wave signal SIN that the R1 input terminal input variable-frequency power sources control occurs；
The UIA voltage follower circuit output end exports sine wave signal SIN-QW；
The UIB voltage follower circuit output end exports sine wave signal SIN-OUT；
The double limiting circuit includes UIC voltage follower circuit, UID negater circuit and RP1, the UIC voltage follower circuit,
UID negater circuit and RP1 series connection；
The RP1 input terminal input direct-current level signal adjusts RP1, an available DC level signal QW, wherein straight
Flow the DC level signal that level signal QW is 5V/DC；
The DC level signal QW is transmitted in U1C voltage follower circuit, converted to obtain DC level signal QW+, described
DC level signal QW+ amplitude size is equal to DC level signal QW, and is all positive signal；
The DC level signal QW+ is transmitted in UID negater circuit, converted to obtain DC level signal QW-, the direct current
Level signal QW- amplitude size is equal to DC level signal QW, and is negative signal.
Wherein, specifically comprise the following steps:
Step 1, practical debugging is tested during variable-frequency power sources, when output voltage reaches rated value, sine wave signal SIN width
It is worth size, can be with output loading size variation, it is completely the same that amplitude changes step；
Step 2, by adjusting RP1, can make output electric current exist when output load current reaches design current maximum value
The 1 boundary's point reduced, at this point, the output maximum current of variable-frequency power sources is limited, maximum current is design current maximum value；
Step 3, when there is short circuit phenomenon at load equipment end, the controlled current flow of variable-frequency power sources output is design current maximum value,
It will not increase.
Embodiment 3
A kind of variable-frequency power sources output short circuit protection control method as shown in Figure 1, including sine wave signal conditioning circuit and short circuit
Conditioning circuit introduces short-circuit conditioning circuit, the short circuit conditioning circuit includes resistance, electricity in sine wave signal conditioning circuit
Position device, three end diodes and chip, the Ω value of the potentiometer are 10K, the resistance setting of the short circuit conditioning circuit input terminal
Output end for R1, the R1 is equipped with UIA voltage follower circuit, and the resistance of the UIA voltage follower circuit output end is set as
The output end of R2, the R2 are equipped with UIB voltage follower circuit, and the access also in parallel of the input terminal of the UIB voltage follower circuit is double
To amplitude limiter circuit；
The given sine wave signal SIN that the R1 input terminal input variable-frequency power sources control occurs；
The UIA voltage follower circuit output end exports sine wave signal SIN-QW；
The UIB voltage follower circuit output end exports sine wave signal SIN-OUT；
The double limiting circuit includes UIC voltage follower circuit, UID negater circuit and RP1, the UIC voltage follower circuit,
UID negater circuit and RP1 series connection；
The RP1 input terminal input direct-current level signal adjusts RP1, an available DC level signal QW, wherein straight
Flow the DC level signal that level signal QW is 10V/DC；
The DC level signal QW is transmitted in U1C voltage follower circuit, converted to obtain DC level signal QW+, described
DC level signal QW+ amplitude size is equal to DC level signal QW, and is all positive signal；
The DC level signal QW+ is transmitted in UID negater circuit, converted to obtain DC level signal QW-, the direct current
Level signal QW- amplitude size is equal to DC level signal QW, and is negative signal.
Wherein, specifically comprise the following steps:
Step 1, practical debugging is tested during variable-frequency power sources, when output voltage reaches rated value, sine wave signal SIN width
It is worth size, can be with output loading size variation, it is completely the same that amplitude changes step；
Step 2, by adjusting RP1, can make output electric current exist when output load current reaches design current maximum value
The 1 boundary's point reduced, at this point, the output maximum current of variable-frequency power sources is limited, maximum current is design current maximum value；
Step 3, when there is short circuit phenomenon at load equipment end, the controlled current flow of variable-frequency power sources output is design current maximum value,
It will not increase.
Working principle of the present invention:
Referring to Figure of description 1, the given sine wave signal SIN that variable-frequency power sources control occurs first passes through UIA voltage follower circuit,
A new sine wave signal SIN-QW is formed, is incorporated to a double limiting circuit here, then pass through a UIB voltage follow
Circuit synthesizes new sine wave signal SIN-OUT, when double limiting circuit works, adjusts RP1, an available 0-10V/
The DC level signal QW of DC, DC level signal QW obtain a new DC level signal by UIC voltage follower circuit
QW+；DC level signal QW+ amplitude size is equal to DC level signal QW, is all positive signal；DC level signal QW+ passes through
U1D negater circuit obtains a new DC level signal QW-；DC level signal QW- amplitude size is equal to direct current ordinary mail
Number QW, but be negative signal；During practical debugging test variable-frequency power sources, when output voltage reaches rated value, sine wave signal
SIN amplitude size, can be with output loading size variation, and it is completely the same that amplitude changes step；It is set when output load current reaches
When counting current maxima, by adjusting RP1, it can to export electric current in 1 boundary's point of reduction.At this point, the output of variable-frequency power sources
Maximum current is limited, and maximum current is design current maximum value；When there is short circuit phenomenon at load equipment end, variable-frequency power sources output
Controlled current flow, be design current maximum value, will not increase.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (5)
1. a kind of variable-frequency power sources output short circuit protection control method, including sine wave signal conditioning circuit and short-circuit conditioning circuit,
It is characterized by: in sine wave signal conditioning circuit, introduce short-circuit conditioning circuit, the short circuit conditioning circuit include resistance,
The resistance of potentiometer, three end diodes and chip, the short circuit conditioning circuit input terminal is set as R1, and the output end of the R1 is set
There is UIA voltage follower circuit, the resistance of the UIA voltage follower circuit output end is set as R2, and the output end of the R2 is equipped with
UIB voltage follower circuit, the input terminal of UIB voltage follower circuit access double limiting circuit also in parallel；
The given sine wave signal SIN that the R1 input terminal input variable-frequency power sources control occurs；
The UIA voltage follower circuit output end exports sine wave signal SIN-QW；
The UIB voltage follower circuit output end exports sine wave signal SIN-OUT；
The double limiting circuit includes UIC voltage follower circuit, UID negater circuit and RP1, the UIC voltage follower circuit,
UID negater circuit and RP1 series connection；
The RP1 input terminal input direct-current level signal adjusts RP1, an available DC level signal QW；
The DC level signal QW is transmitted in U1C voltage follower circuit, converted to obtain DC level signal QW+；
The DC level signal QW+ is transmitted in UID negater circuit, converted to obtain DC level signal QW-；
Wherein, specifically comprise the following steps:
Step 1, practical debugging is tested during variable-frequency power sources, when output voltage reaches rated value, sine wave signal SIN width
It is worth size, can be with output loading size variation, it is completely the same that amplitude changes step；
Step 2, by adjusting RP1, can make output electric current exist when output load current reaches design current maximum value
The 1 boundary's point reduced, at this point, the output maximum current of variable-frequency power sources is limited, maximum current is design current maximum value；
Step 3, when there is short circuit phenomenon at load equipment end, the controlled current flow of variable-frequency power sources output is design current maximum value,
It will not increase.
2. a kind of variable-frequency power sources output short circuit protection control method according to claim 1, it is characterised in that: the direct current
Level signal QW is the DC level signal of 0-10V/DC.
3. a kind of variable-frequency power sources output short circuit protection control method according to claim 1, it is characterised in that: the direct current
Level signal QW+ amplitude size is equal to DC level signal QW, and is all positive signal.
4. a kind of variable-frequency power sources output short circuit protection control method according to claim 1, it is characterised in that: the direct current
Level signal QW- amplitude size is equal to DC level signal QW, and is negative signal.
5. a kind of variable-frequency power sources output short circuit protection control method according to claim 1, it is characterised in that: the current potential
The Ω value of device is 10K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811388570.7A CN109194108A (en) | 2018-11-21 | 2018-11-21 | A kind of variable-frequency power sources output short circuit protection control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811388570.7A CN109194108A (en) | 2018-11-21 | 2018-11-21 | A kind of variable-frequency power sources output short circuit protection control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142668A (en) * | 2011-03-21 | 2011-08-03 | 湖北网安科技有限公司 | Overcurrent rapid-disconnection protection circuit based on digital control potentiometer technology |
| CN202014297U (en) * | 2011-03-24 | 2011-10-19 | 鸟取三洋电机（广州）有限公司 | Sidetone control circuit for telephone |
| CN107528295A (en) * | 2017-09-29 | 2017-12-29 | 中国西电电气股份有限公司 | A kind of three-phase protective circuit and method for VSC |
| CN108037787A (en) * | 2017-11-23 | 2018-05-15 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of A/D chip input voltages limiter protection circuit |
| CN108627191A (en) * | 2018-07-06 | 2018-10-09 | 哈尔滨理工大学 | Position sensor automatic detection device and detection method |
-
2018
- 2018-11-21 CN CN201811388570.7A patent/CN109194108A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142668A (en) * | 2011-03-21 | 2011-08-03 | 湖北网安科技有限公司 | Overcurrent rapid-disconnection protection circuit based on digital control potentiometer technology |
| CN202014297U (en) * | 2011-03-24 | 2011-10-19 | 鸟取三洋电机（广州）有限公司 | Sidetone control circuit for telephone |
| CN107528295A (en) * | 2017-09-29 | 2017-12-29 | 中国西电电气股份有限公司 | A kind of three-phase protective circuit and method for VSC |
| CN108037787A (en) * | 2017-11-23 | 2018-05-15 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of A/D chip input voltages limiter protection circuit |
| CN108627191A (en) * | 2018-07-06 | 2018-10-09 | 哈尔滨理工大学 | Position sensor automatic detection device and detection method |
Non-Patent Citations (1)
| Title |
|---|
| ZH6817719: "正弦波经过限幅之后出现的这种下冲现象该如何消除", 《中国电子网技术论坛，》 * |
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Application publication date: 20190111 |