CN103364653B - The method of testing of the maximum load quantity of multichannel light fixture parallel circuit - Google Patents
The method of testing of the maximum load quantity of multichannel light fixture parallel circuit Download PDFInfo
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- CN103364653B CN103364653B CN201210104172.4A CN201210104172A CN103364653B CN 103364653 B CN103364653 B CN 103364653B CN 201210104172 A CN201210104172 A CN 201210104172A CN 103364653 B CN103364653 B CN 103364653B
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Abstract
The present invention relates to technical field of circuit design, it is provided that the method for testing of the maximum load quantity of a kind of multichannel light fixture parallel circuit, the method determining, a start input voltage is V0Parallel circuit, test often overlapping light fixture, draw the average operating current of light fixture and each resistance value overlapping light fixture upper conductor, utilize Ohm's law to calculate the actual light fixture quantity that can install.In the present invention, utilize said method, by calculating load light fixture quantity maximum in side circuit, light fixture in parallel circuit can be carried out appropriate design, thus both can guarantee that and circuit can the most reasonably be arranged light fixture, do not cause waste, can guarantee that light fixture normally works, reliably and securely works yet.
Description
Technical field
The present invention relates to circuit engineering field, more specifically, relate to the maximum of multichannel light fixture parallel circuit
The method of testing of load number.
Background technology
At present, on square, coal mine roadway, plant area, the various occasions such as oil field all use substantial amounts of fixing illumination
Light fixture.These fixing lightings are typically all connected in parallel on main power source, and design and installation in parallel circuit
During light fixture, following two factor to be considered:, in parallel circuit whether the maximum current of conductor loading
Excessive；Two, the line pressure drop in whole circuit is the most excessive.When circuit design is unreasonable, cause load
When big electric current is excessive, conductor overheating can be caused to cause potential safety hazard；When pressure drop is excessive, in parallel circuit
Last a few set light fixture can cannot start normal work because pressure drop is excessive, causes the waste of light fixture.
Summary of the invention
The technical problem to be solved is to overcome the defect of prior art, it is provided that a kind of multichannel light fixture
The method of testing of the maximum load quantity of parallel circuit, by the method, can be the most reasonable
Layout light fixture, do not cause waste, can guarantee that light fixture normally works, reliably and securely works yet.
For solving above-mentioned technical problem, the technical scheme is that a kind of multichannel light fixture parallel circuit of offer
The method of testing of maximum load quantity, comprise the following steps:
Determine that a start input voltage is V0Parallel circuit, select N1Set light fixture, measures each set light fixture respectively
At rated operational voltage, upper limit operation voltage and the current value of lower limit running voltage, then according to described three
Individual current value obtains average current value I of each set light fixture1, further according to N1Average current value I of set light fixture1Obtain
Average current value I of whole parallel circuit；
According to
Calculate line resistance R of each set light fixture1, in this formula, P is the resistivity of wire,
L is the conductor length of every suit light fixture, and S is sectional area of wire, and according to N1Line resistance R of set light fixture1?
Average line resistance R of the wire of each set light fixture in whole parallel circuit；
According to
Calculate the value of load light fixture quantity N maximum in side circuit,
Wherein, V0For the start input voltage of first set light fixture, V in parallel circuit1For lower limit running voltage, I is
Above-mentioned average current value, R is above-mentioned average line resistance.
Specifically, described upper limit operation voltage and lower limit running voltage are respectively and keep each under rated operational voltage
The parameter constant of set light fixture, higher limit when being adjusted up voltage and the lower limit in time lowering voltage.
Specifically, the parameter of described light fixture includes the magnitude of voltage of input, the electric current of input, the magnitude of voltage of output
And the current value of output.
Specifically, as described N1When the specification of set light fixture is identical, each average current value I overlapping light fixture1≈ is in parallel
Average current value I of circuit, each line resistance R overlapping light fixture1The average line resistance of wire in the whole parallel circuit of ≈
Value R.
In the present invention, utilize said method, light fixture in parallel circuit can be carried out appropriate design, thus can
Ensure the most reasonably arrange light fixture, do not cause waste, also can guarantee that light fixture normally work,
Reliably and securely work.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment,
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to
Explain the present invention, be not intended to limit the present invention.
The invention provides the method for testing of the maximum load quantity of a kind of multichannel light fixture parallel circuit, including with
Lower step:
Determine that a start input voltage is V0Parallel circuit, select N1Set light fixture, measures each set light fixture respectively
At rated operational voltage, upper limit operation voltage and the current value of lower limit running voltage, further according to described three
Current value obtains average current value I of each set light fixture1, then according to N1Average current value I of set light fixture1Obtain
Average current value I of whole parallel circuit, wherein, described upper limit operation voltage and lower limit running voltage are respectively
For keeping each parameter constant overlapping light fixture under rated operational voltage, higher limit when being adjusted up voltage and to
Lower lower limit during voltage；
According to
Calculate line resistance R of each set light fixture1, in this formula, P is the resistivity of wire,
L is the conductor length of every suit light fixture, and S is sectional area of wire, and according to N1Line resistance R of set light fixture1?
Average line resistance R of the wire of each set light fixture in whole parallel circuit；
According to
Calculating the value of N, N is in side circuit the negative of maximum
Carry light fixture quantity, wherein, V0For the start input voltage of first set light fixture, V in parallel circuit1For light fixture
Lower limit running voltage, I is above-mentioned average current value, and R is above-mentioned average line resistance.
Utilize said method, by calculating load light fixture quantity maximum in side circuit, can be to parallel circuit
Middle light fixture carries out appropriate design, thus both can guarantee that in circuit and can the most reasonably arrange light fixture, does not makes
Become waste, also can guarantee that light fixture normally works, reliably and securely works.
It is described in further detail as a example by a concrete multichannel light fixture parallel circuit below.
One start input voltage V0The light fixture parallel circuit of=AC80V, it is contemplated that fill 30 set light fixtures, this 30 set lamp
Tool specification is the same, each average current value I overlapping light fixture1Average current value I of ≈ parallel circuit, so time survey
Obtain average current value I of the most a set of light fixture1?.
Set the rated operational voltage of this light fixture as AC127V, utilize voltage/current table to record this nominal operation
The current value of this light fixture under voltage is 0.4A, utilizes numeral electrical quantity to obtain under this rated operational voltage simultaneously
The output electrical quantity of light fixture is voltage DC60V, and electric current is 0.7A；
The output electrical quantity keeping this light fixture is maintained at voltage DC60V, and electric current is that 0.7A is constant, is adjusted up
Voltage is until obtaining upper limit operation voltage when maintaining this parameter constant is AC145V, and obtains this upper limit simultaneously
The current value 0.3A of light fixture during running voltage AC145V；The output electrical quantity keeping this light fixture is maintained at normally
In the range of constant, downwards regulation voltage is until obtaining lower limit running voltage V when maintaining this parameter constant1For
AC60V, and the current value 0.5A of light fixture when simultaneously obtaining this lower limit running voltage AC60V；Seek above three
The meansigma methods of current value obtains average current value I of this light fixture1=0.4A, obtains the average of parallel circuit the most simultaneously
Current value I=0.4A.
This light fixture is copper conductor, and the resistivity of copper is 0.017, records that often to overlap the conductor length of light fixture be 10m,
The sectional area of copper conductor is 1.5mm2, calculate according to formula
I.e. same
Time obtain parallel circuit wire average resistance R=0.1133 Ω.
Utilize formula
In above-mentioned formula, it is known that V0=AC80V, V1=AC60V,
I=0.4A, R=0.1133 Ω, calculates, N=29.Thus can calculate, in whole parallel circuit
It is 29 that big band carries light fixture quantity, can guarantee that the normal work of each light fixture when arranging 29 light fixtures.
Same, when we want to install 30 light fixtures, utilize formula
?
Know V0=AC80V, I=A, R=0.1133 Ω, during N=30, calculates circuit lower limit running voltage
V1=58.93V, is i.e. that in parallel circuit, the running voltage of last light fixture is 58.93V, and it is less than light fixture
Lower limit running voltage 60V, although so ensure that in circuit, the intensity of electric current is 0.4A, but voltage is inadequate,
It cannot be guaranteed that the normal work of last light fixture.Therefore according to above-mentioned method for designing, we can be by parallel connection
In circuit, the quantitative design of light fixture is 29.Below table shows relevant parameter during this parallel circuit design.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Any amendment, equivalent and the improvement etc. made within spirit and principle, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (4)
1. the method for testing of the maximum load quantity of a multichannel light fixture parallel circuit, it is characterised in that: include
Following steps:
Determine that a start input voltage is V0Parallel circuit, select N1Set light fixture, measures each set light fixture respectively
At rated operational voltage, upper limit operation voltage and the current value of lower limit running voltage, then according to described three
Individual current value obtains average current value I of each set light fixture1, further according to N1Average current value I of set light fixture1Obtain
Average current value I of whole parallel circuit；
According toCalculate line resistance R of each set light fixture1, in this formula, P is the resistivity of wire,
L is the conductor length of every suit light fixture, and S is sectional area of wire, and according to N1Line resistance R of set light fixture1?
Average line resistance R of the wire of each set light fixture in whole parallel circuit；
According toThe value of load number N maximum in calculating side circuit, wherein,
V0For the start input voltage of first set light fixture, V in parallel circuit1For a set of light fixture last in parallel circuit
Lower limit running voltage, I is above-mentioned average current value, and R is above-mentioned average line resistance.
2. the method for testing of the maximum load quantity of multichannel light fixture parallel circuit as claimed in claim 1, its
It is characterised by: described upper limit operation voltage and lower limit running voltage are respectively and keep respectively overlapping under rated operational voltage
The parameter constant of light fixture, higher limit when being adjusted up voltage and the lower limit in time lowering voltage.
3. the method for testing of the maximum load quantity of multichannel light fixture parallel circuit as claimed in claim 2, its
Be characterised by: the parameter of described light fixture include input magnitude of voltage, the electric current of input, the magnitude of voltage of output and
The current value of output.
4. the method for testing of the maximum load quantity of multichannel light fixture parallel circuit as claimed in claim 1, its
It is characterised by: as described N1When the specification of set light fixture is identical, each average current value I overlapping light fixture1≈ parallel connection electricity
Average current value I on road, each line resistance R overlapping light fixture1The average line resistance of wire in the whole parallel circuit of ≈
R。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210104172.4A CN103364653B (en) | 2012-04-10 | 2012-04-10 | The method of testing of the maximum load quantity of multichannel light fixture parallel circuit |
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| CN201210104172.4A CN103364653B (en) | 2012-04-10 | 2012-04-10 | The method of testing of the maximum load quantity of multichannel light fixture parallel circuit |
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| CN103364653A CN103364653A (en) | 2013-10-23 |
| CN103364653B true CN103364653B (en) | 2016-09-28 |
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| CN112737113B (en) * | 2020-12-23 | 2023-03-21 | 中煤科工集团重庆研究院有限公司 | Method for increasing number of power load slave devices based on network address |
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| JPS59197869A (en) * | 1983-04-25 | 1984-11-09 | Nissin Electric Co Ltd | Electricity quantity detecting device of signal source |
| CN1980505A (en) * | 2005-12-11 | 2007-06-13 | 常涛涛 | Efficient energy-saving lighting system |
| CN101635077A (en) * | 2009-07-31 | 2010-01-27 | 长沙理工大学 | Anti-theft detection method for road lamp cable |
| CN101702097A (en) * | 2009-11-25 | 2010-05-05 | 浪潮电子信息产业股份有限公司 | Energy-saving power supply system |
| CN201489040U (en) * | 2009-07-30 | 2010-05-26 | 比亚迪股份有限公司 | Central junction box testing apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7969156B2 (en) * | 2007-03-30 | 2011-06-28 | Liebert Corporation | Method and apparatus for monitoring a load |
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2012
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|---|---|---|---|---|
| JPS59197869A (en) * | 1983-04-25 | 1984-11-09 | Nissin Electric Co Ltd | Electricity quantity detecting device of signal source |
| CN1980505A (en) * | 2005-12-11 | 2007-06-13 | 常涛涛 | Efficient energy-saving lighting system |
| CN201489040U (en) * | 2009-07-30 | 2010-05-26 | 比亚迪股份有限公司 | Central junction box testing apparatus |
| CN101635077A (en) * | 2009-07-31 | 2010-01-27 | 长沙理工大学 | Anti-theft detection method for road lamp cable |
| CN101702097A (en) * | 2009-11-25 | 2010-05-05 | 浪潮电子信息产业股份有限公司 | Energy-saving power supply system |
Non-Patent Citations (3)
| Title |
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| 灯具产品的可靠性设计;海洋王照明科技股份有限公司;《中国质量》;20101231(第3期);第23-26页 * |
| 用电器的串、并联能随意更改吗;刘顺航;《中学生数理化》;20111231(第Z1期);第5-6页 * |
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