CN109507508A - A kind of circuit and method controlling short dot phase and duration - Google Patents
A kind of circuit and method controlling short dot phase and duration Download PDFInfo
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- CN109507508A CN109507508A CN201811394023.XA CN201811394023A CN109507508A CN 109507508 A CN109507508 A CN 109507508A CN 201811394023 A CN201811394023 A CN 201811394023A CN 109507508 A CN109507508 A CN 109507508A
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- circuit
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- phase
- duration
- starting point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a kind of circuits and method for controlling short dot phase and duration, described method includes following steps: step S1, current phase zero passage detection is carried out using sampled measurements module, when current phase reaches zero point, according to required short dot phase settings short circuit starting point timer, and start short-circuit starting point timer；Step S2, judges whether short-circuit starting point timer timing reaches；Short circuit then occurs for step S3, and set short-circuit duration when short-circuit starting point timer timing reaches, and starts short-circuit duration timer；Step S4, judges whether short-circuit duration timer timing reaches；Step S5 reaches in short-circuit duration timer timing, then stops short-circuit condition, by the invention it is possible to realize the purpose of control short dot phase and duration.
Description
Technical field
The present invention relates to architectural electricity fireproofing technique fields, more particularly to a kind of electricity for controlling short dot phase and duration
Road and method.
Background technique
Currently, there is a kind of new product for electric short circuit current limliting, this kind of product building ring in architectural electricity fire protection field
Border is in short-circuit limit state, and is the current limliting speed of Microsecond grade again, in order to guarantee the consistency of detection, needs in specific phase
Short circuit occurs for site.Therefore, it is necessary to the circuits and method of a kind of controllable short dot phase.
Summary of the invention
In order to overcome the deficiencies of the above existing technologies, purpose of the present invention is to provide a kind of control short dot phase and
The circuit and method of duration, to realize the purpose of control short dot phase and duration.
In view of the above and other objects, the present invention proposes a kind of circuit for controlling short dot phase and duration, comprising:
Power module, for alternating voltage needed for providing measurement；
Sample module, for generating current limiting effect to be measured in short circuit；
Sampled measurements module, for zero passage phase-detection to be sampled and carried out to load current to control short circuit generation
Phase and duration；
Load blocks, for switching on and off short circuit path by setting phase under the control of the sampled measurements module.
Preferably, the sampled measurements module includes noninductive sample resistance, phase detecting circuit and delay control circuit.
Preferably, one end of the noninductive sample resistance is connected with the anode of phase detecting circuit by the sample module
The power module, the other end of the noninductive sample resistance and the negative terminal of phase detecting circuit are commonly connected to the load mould
Block, the output end of the phase detecting circuit are connected to the input terminal of the delay control circuit, the delay control circuit
Output end is connected to the load blocks.
Preferably, the load blocks include resistive load and synchronous switch.
Preferably, the other end of the noninductive sample resistance and the negative terminal of phase detecting circuit are commonly connected to described resistive
One end of load and one end of synchronous switch, the output end of the delay control circuit are connected to the control of the synchronous switch
The other end of end, the other end of the synchronous switch and the resistive load is connected to the power module.
In order to achieve the above objectives, the present invention also provides a kind of methods for controlling short dot phase and duration, including walk as follows
It is rapid:
Step S1, the sampled measurements module carry out current phase zero passage detection, with when current phase reaches zero point, root
According to required short dot phase settings short circuit starting point timer, and start short-circuit starting point timer；
Step S2, judges whether short-circuit starting point timer timing reaches；
Short circuit then occurs for step S3, and set short-circuit duration when short-circuit starting point timer timing reaches, and starts
Short-circuit duration timer；
Step S4, judges whether short-circuit duration timer timing reaches；
Step S5 reaches in short-circuit duration timer timing, then stops short-circuit condition.
Preferably, in step S1, if current phase is not up to zero point, intermittent current phase zero passage detection.
Preferably, in step S1, whether detection current phase reaches zero point rising edge.
Preferably, in step S3, if the short circuit starting point timer timing does not arrive, return step S2 continues to sentence
It is disconnected.
Preferably, in step S5, if the short circuit duration timer timing does not reach, return step S4 continues
Judgement.
Compared with prior art, the circuit and method of a kind of control short dot phase of the present invention and duration may be implemented to control
The purpose of short dot phase and duration processed.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of the circuit of a kind of control short dot phase of the present invention and duration；
Fig. 2 is the step flow chart of the method for a kind of control short dot phase of the present invention and duration；
Fig. 3 is the step flow chart that the method for short dot phase and duration is controlled in the specific embodiment of the invention.
Specific embodiment
Below by way of specific specific example and embodiments of the present invention are described with reference to the drawings, those skilled in the art can
Understand further advantage and effect of the invention easily by content disclosed in the present specification.The present invention can also pass through other differences
Specific example implemented or applied, details in this specification can also be based on different perspectives and applications, without departing substantially from
Various modifications and change are carried out under spirit of the invention.
Fig. 1 is the circuit structure diagram of the circuit of a kind of control short dot phase of the present invention and duration.As shown in Figure 1, this hair
Bright a kind of circuit for controlling short dot phase and duration, comprising: including power module 10, sample module 20, sampled measurements module
30 and load blocks 40.
Wherein, power module 10 is made of alternating-current voltage source GR (220V/380V 50HZ) and single-pole single-throw switch (SPST) S, is used for
Alternating voltage needed for measurement is provided；Sample module 20 is made of one or more sample TR, to be measured for generating in short circuit
Current limiting effect；Sampled measurements module 30 is by noninductive sample resistance R (0.001~0.1 Europe, 0.01 Europe of representative value), phase-detection electricity
Road PD1 and delay control circuit Delay1 composition, for being sampled and being carried out zero passage phase-detection to load current to control
The phase and duration that short circuit occurs；Load blocks 40 are made of resistive load Z1 and synchronous switch K, in sampled measurements module
Short circuit path is switched on and off by setting phase under 30 control.
When measurement, power module 10, sample module 20, sampled measurements module 30 and load blocks 40 are successively contacted, specifically
For, the firewire of alternating-current voltage source GR is connected to one end of single-pole single-throw switch (SPST) S, and the other end of single-pole single-throw switch (SPST) S is connected to
The end of incoming cables of sample TR, the leading-out terminal of sample TR are connected to one end of noninductive sample resistance R and the anode of phase-detection PD1, nothing
The negative terminal of the other end and phase-detection PD1 of feeling sample resistance R is commonly connected to one end and the synchronous switch K of resistive load Z1
One end, the output end of phase-detection PD1 is connected to the input terminal of delays time to control Delay1, the output end of delays time to control Delay1
It is connected to the control terminal of synchronous switch K, the other end of synchronous switch K and the other end of resistive load Z1 are connected to voltage source GR's
Zero curve.
Preferably, single-pole single-throw switch (SPST) S can control the firewire and zero curve of voltage source GR simultaneously using double-point double-throw switch
(or two phase lines) to ensure safety, correspondingly, the other end of synchronous switch K and the other end of resistive load Z1 are connected to double-pole
The zero curve normally open end of commutator, the firewire and zero curve of voltage source GR be connected to double-point double-throw switch firewire and zero curve it is normally closed
End.
Fig. 2 is the step flow chart of the method for a kind of control short dot phase of the present invention and duration.As shown in Fig. 2, this hair
A kind of bright method for controlling short dot phase and duration, includes the following steps:
Step S1, the sampled measurements module carry out current phase zero passage detection, to reach zero point (i.e. zero in current phase
Point rising edge) when, according to required short dot phase settings short circuit starting point timer (using delay control circuit), and start short
Road starting point timer；If current phase is not up to zero point (rising edge), intermittent current phase zero passage detection.
Step S2, judges whether short-circuit starting point timer timing reaches；
When reaching short-circuit phase point, then short circuit occurs for step S3 when short-circuit starting point timer timing reaches,
And short-circuit duration is set, start short-circuit duration timer (using delay control circuit)；If when short-circuit starting point timer timing
Between do not arrive, then return step S2 continues to judge；
Step S4, judges whether short-circuit duration timer timing reaches；
Step S5 reaches in short-circuit duration timer timing, then stops short-circuit condition；If otherwise short-circuit duration timing
Device timing does not reach, then return step S4 continues to judge.
Fig. 3 is the step flow chart that the method for short dot phase and duration is controlled in the specific embodiment of the invention.In this hair
In bright specific embodiment, the process for controlling short dot phase and duration is as follows:
1, current phase zero passage detection (rising edge)；2, current phase reaches zero point (rising edge)；3, according to required short
Road phase point opens short-circuit starting point timer (timer is 56us/ degree)；4, it reaches phase point and short circuit occurs；5, it sets short
Road duration timer is to be arranged short-circuit duration；6, start short-circuit duration timer；7, arrival time stops short-circuit condition.
As it can be seen that control short dot phase may be implemented in the circuit and method of a kind of control short dot phase of the present invention and duration
The purpose of position and duration.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.Any
Without departing from the spirit and scope of the present invention, modifications and changes are made to the above embodiments by field technical staff.Therefore,
The scope of the present invention, should be as listed in the claims.
Claims (10)
1. a kind of circuit for controlling short dot phase and duration, comprising:
Power module, for alternating voltage needed for providing measurement；
Sample module, for generating current limiting effect to be measured in short circuit；
Sampled measurements module controls the phase of short circuit generation for zero passage phase-detection to be sampled and carried out to load current
And duration；
Load blocks, for switching on and off short circuit path by setting phase under the control of the sampled measurements module.
2. a kind of circuit for controlling short dot phase and duration as described in claim 1, it is characterised in that: the sampled measurements
Module includes noninductive sample resistance, phase detecting circuit and delay control circuit.
3. a kind of circuit for controlling short dot phase and duration as claimed in claim 2, it is characterised in that: the noninductive sampling
One end of resistance connects the power module, the noninductive sampling electricity by the sample module with the anode of phase detecting circuit
The other end of resistance and the negative terminal of phase detecting circuit are commonly connected to the load blocks, the output end of the phase detecting circuit
It is connected to the input terminal of the delay control circuit, the output end of the delay control circuit is connected to the load blocks.
4. a kind of circuit for controlling short dot phase and duration as claimed in claim 3, it is characterised in that: the load blocks
Including resistive load and synchronous switch.
5. a kind of circuit for controlling short dot phase and duration as claimed in claim 4, it is characterised in that: the noninductive sampling
The other end of resistance and the negative terminal of phase detecting circuit be commonly connected to the resistive load one end and synchronous switch one
End, the output end of the delay control circuit are connected to the control terminal of the synchronous switch, the other end of the synchronous switch and
The other end of the resistive load is connected to the power module.
6. a kind of method for controlling short dot phase and duration, includes the following steps:
Step S1, using sampled measurements module carry out current phase zero passage detection, in current phase reach zero point when, according to institute
Short dot phase settings short circuit starting point timer is needed, and starts short-circuit starting point timer；
Step S2, judges whether short-circuit starting point timer timing reaches；
Short circuit then occurs for step S3, and set short-circuit duration when short-circuit starting point timer timing reaches, starting short circuit
Duration timer；
Step S4, judges whether short-circuit duration timer timing reaches；
Step S5 reaches in short-circuit duration timer timing, then stops short-circuit condition.
7. a kind of method for controlling short dot phase and duration as claimed in claim 6, it is characterised in that: in step S1,
If current phase is not up to zero point, intermittent current phase zero passage detection.
8. a kind of method for controlling short dot phase and duration as claimed in claim 6, it is characterised in that: in step S1,
Whether detection current phase reaches zero point rising edge.
9. a kind of method for controlling short dot phase and duration as claimed in claim 6, it is characterised in that: in step S3,
If the short circuit starting point timer timing does not arrive, return step S2 continues to judge.
10. a kind of method for controlling short dot phase and duration as claimed in claim 6, it is characterised in that: in step S5,
If the short circuit duration timer timing does not reach, return step S4 continues to judge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811394023.XA CN109507508A (en) | 2018-11-21 | 2018-11-21 | A kind of circuit and method controlling short dot phase and duration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811394023.XA CN109507508A (en) | 2018-11-21 | 2018-11-21 | A kind of circuit and method controlling short dot phase and duration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109507508A true CN109507508A (en) | 2019-03-22 |
Family
ID=65749491
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811394023.XA Pending CN109507508A (en) | 2018-11-21 | 2018-11-21 | A kind of circuit and method controlling short dot phase and duration |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569725A (en) * | 2015-01-09 | 2015-04-29 | 广东电网有限责任公司佛山供电局 | Electric power system short circuit fault test device capable of precisely controlling short circuit time |
| CN106159876A (en) * | 2016-07-10 | 2016-11-23 | 珠海派诺科技股份有限公司 | Electric fireproof current-limiting type protector and fault current detection method |
| CN106159875A (en) * | 2015-04-27 | 2016-11-23 | 华中科技大学 | A kind of short circuit current zero predicting method and short circuit current phase selection disjunction control method |
| CN106538068A (en) * | 2014-05-22 | 2017-03-22 | 杰拉德照明控股私人有限公司 | A zero-crossing detection circuit for a dimmer circuit |
| CN206686151U (en) * | 2017-03-20 | 2017-11-28 | 上海神明控制工程有限公司 | A kind of high-energy igniter charge/discharge control circuit |
-
2018
- 2018-11-21 CN CN201811394023.XA patent/CN109507508A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106538068A (en) * | 2014-05-22 | 2017-03-22 | 杰拉德照明控股私人有限公司 | A zero-crossing detection circuit for a dimmer circuit |
| CN104569725A (en) * | 2015-01-09 | 2015-04-29 | 广东电网有限责任公司佛山供电局 | Electric power system short circuit fault test device capable of precisely controlling short circuit time |
| CN106159875A (en) * | 2015-04-27 | 2016-11-23 | 华中科技大学 | A kind of short circuit current zero predicting method and short circuit current phase selection disjunction control method |
| CN106159876A (en) * | 2016-07-10 | 2016-11-23 | 珠海派诺科技股份有限公司 | Electric fireproof current-limiting type protector and fault current detection method |
| CN206686151U (en) * | 2017-03-20 | 2017-11-28 | 上海神明控制工程有限公司 | A kind of high-energy igniter charge/discharge control circuit |
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Application publication date: 20190322 |