CN103364653A - Method for testing maximum load quantity in multi-lamp parallel circuit - Google Patents
Method for testing maximum load quantity in multi-lamp parallel circuit Download PDFInfo
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- CN103364653A CN103364653A CN2012101041724A CN201210104172A CN103364653A CN 103364653 A CN103364653 A CN 103364653A CN 2012101041724 A CN2012101041724 A CN 2012101041724A CN 201210104172 A CN201210104172 A CN 201210104172A CN 103364653 A CN103364653 A CN 103364653A
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- light fixture
- parallel circuit
- voltage
- current value
- line resistance
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Abstract
The invention relates to the technical field of circuit design, and provides a method for testing the maximum load quantity in a multi-lamp parallel circuit. The method has the steps of determining a parallel circuit of which the initial input voltage is V0; testing each lamp, so as to obtain the average working current of the lamps and the resistance of a lead on each lamp; and calculating the quantity of lamps which can be actually arranged according to the Ohm's law. According to the method, by calculating the maximum quantity of load lamps in an actual circuit, the lamps in the parallel circuit can be reasonably designed, accordingly, the lamps can be most reasonably arranged in the circuit, waste is avoided, and the lamps are enabled to work normally, safely and reliably.
Description
Technical field
The present invention relates to the circuit engineering field, more particularly, relate to the method for testing of the maximum load quantity of multichannel light fixture parallel circuit.
Background technology
At present, on the square, the various occasions such as coal mine roadway, plant area, oil field all adopt a large amount of priming illumination light fixtures.These priming illumination light fixtures generally all are to be connected in parallel on the primary power, and in parallel circuit during the design and installation light fixture, generally will consider following two factors: one, whether the maximum current of conductor loading is excessive in the parallel circuit; Two, whether the line pressure in the whole circuit falls excessive.When line design is unreasonable, when causing the maximum current of load excessive, can causes conductor overheating and cause potential safety hazard; When pressure drop was excessive, last a few cover light fixtures can can't start normal operation because pressure drop is excessive in the parallel circuit, cause the waste of light fixture.
Summary of the invention
Technical matters to be solved by this invention is to overcome the defective of prior art, a kind of method of testing of maximum load quantity of multichannel light fixture parallel circuit is provided, pass through the method, can in circuit, reasonably arrange to greatest extent light fixture, do not cause waste, can guarantee light fixture normal operation, safety yet, work reliably.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of method of testing of maximum load quantity of multichannel light fixture parallel circuit is provided, may further comprise the steps:
Determine that an initial input voltage is V
0Parallel circuit, select N
1The cover light fixture is measured respectively and is respectively overlapped light fixture at the current value of rated operational voltage, upper limit operating voltage and lower limit operating voltage, then obtains respectively to overlap the average current value I of light fixture according to described three current values
1, again according to N
1The average current value I of cover light fixture
1Obtain the average current value I of whole parallel circuit;
According to
Calculate the line resistance R that respectively overlaps light fixture
1, in this formula, P is the resistivity of wire, and L is the conductor length of every suit light fixture, and S is sectional area of wire, and according to N
1The line resistance R of cover light fixture
1Obtain respectively overlapping in the whole parallel circuit average line resistance R of the wire of light fixture;
According to
Calculate the value of load light fixture quantity N maximum in the side circuit, wherein, V
0Be the initial input voltage of first set light fixture in the parallel circuit, V
1Be the lower limit operating voltage, I is above-mentioned average current value, and R is above-mentioned average line resistance.
Particularly, described upper limit operating voltage and lower limit operating voltage are respectively the parameter constant that keeps respectively overlapping under the rated operational voltage light fixture, upwards the higher limit during regulation voltage and the lower limit during to downward modulation voltage.
Particularly, the parameter of described light fixture comprises the magnitude of voltage of input, the electric current of input, the magnitude of voltage of output and the current value of output.
Particularly, as described N
1When the specification of cover light fixture was identical, each overlapped the average current value I of light fixture
1The average current value I of ≈ parallel circuit, each overlaps the line resistance R of light fixture
1The average line resistance R of wire in the whole parallel circuit of ≈.
Among the present invention, utilize said method, can carry out appropriate design to light fixture in the parallel circuit, thereby can guarantee in circuit, reasonably to arrange to greatest extent light fixture, do not cause waste, also can guarantee light fixture normal operation, safety, work reliably.
Embodiment
In order to make 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, is not intended to limit the present invention.
The invention provides a kind of method of testing of maximum load quantity of multichannel light fixture parallel circuit, may further comprise the steps:
Determine that an initial input voltage is V
0Parallel circuit, select N
1The cover light fixture is measured respectively and is respectively overlapped light fixture at the current value of rated operational voltage, upper limit operating voltage and lower limit operating voltage, obtains respectively to overlap again the average current value I of light fixture according to described three current values
1, then according to N
1The average current value I of cover light fixture
1Obtain the average current value I of whole parallel circuit, wherein, described upper limit operating voltage and lower limit operating voltage are respectively the parameter constant that keeps respectively overlapping under the rated operational voltage light fixture, upwards the higher limit during regulation voltage and the lower limit during to downward modulation voltage;
According to
Calculate the line resistance R that respectively overlaps light fixture
1, in this formula, P is the resistivity of wire, and L is the conductor length of every suit light fixture, and S is sectional area of wire, and according to N
1The line resistance R of cover light fixture
1Obtain respectively overlapping in the whole parallel circuit average line resistance R of the wire of light fixture;
According to
Calculate the value of N, N is load light fixture quantity maximum in the side circuit, wherein, and V
0Be the initial input voltage of first set light fixture in the parallel circuit, V
1Be the lower limit operating voltage of light fixture, 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 the side circuit, can carry out appropriate design to light fixture in the parallel circuit, thereby can guarantee reasonably to arrange to greatest extent light fixture in the circuit, do not cause waste, can guarantee light fixture normal operation, safety yet, work reliably.
Below be described in further detail as an example of a concrete multichannel light fixture parallel circuit example.
One initial input voltage V
0The light fixture parallel circuit of=AC80V estimates to fill 30 cover light fixtures, and this 30 cover light fixture specification is the same, and each overlaps the average current value I of light fixture
1The average current value I of ≈ parallel circuit, so the time record wherein the average current value I of a cover light fixture
1Get final product.
The rated operational voltage of setting this light fixture is AC127V, the current value that utilizes the voltage/current table to record this light fixture under this rated operational voltage is 0.4A, the output electrical quantity that utilizes simultaneously digital electrical quantity to obtain light fixture under this rated operational voltage is voltage DC60V, and electric current is 0.7A;
Keep the output electrical quantity of this light fixture to remain on voltage DC60V, electric current is that 0.7A is constant, upwards regulation voltage is until the upper limit operating voltage when obtaining to keep this parameter constant is AC145V, and the current value 0.3A of light fixture when obtaining simultaneously this upper limit operating voltage AC145V; It is constant to keep the output electrical quantity of this light fixture to remain in the normal scope, and regulation voltage is until the lower limit operating voltage V when obtaining to keep this parameter constant downwards
1Be AC60V, and the current value 0.5A of light fixture when obtaining simultaneously this lower limit operating voltage AC60V; Ask the mean value of above-mentioned three current values to obtain the average current value I of this light fixture
1=0.4A namely obtains the average current value I=0.4A of parallel circuit simultaneously.
This light fixture is copper conductor, and the resistivity of copper is 0.017, and the conductor length that records every cover light fixture is 10m, and the sectional area of copper conductor is 1.5mm
2, calculate according to formula
Namely obtain simultaneously the average resistance value R=0.1133 Ω of wire of parallel circuit.
Utilize formula
In the above-mentioned formula, known V
0=AC80V, V
1=AC60V, I=0.4A, R=0.1133 Ω calculates, N=29.Can calculate thus, to carry light fixture quantity be 29 to maximum band in the whole parallel circuit, can guarantee the normal operation of each light fixture when 29 light fixtures are set.
Same, when we want to install 30 light fixtures, utilize formula
Known V
0=AC80V, I=A, R=0.1133 Ω during N=30, calculates circuit lower limit operating voltage V
1=58.93V, the operating voltage that namely is last light fixture in the parallel circuit is 58.93V, and it is lower than the lower limit operating voltage 60V of light fixture, although guaranteed that like this intensity of electric current is 0.4A in the circuit, but voltage is inadequate, can not guarantee the normal operation of last light fixture.So according to above-mentioned method for designing, we can be designed to the quantity of light fixture in the parallel circuit 29.Correlation parameter when following form shows this parallel circuit design.
Below only be preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the method for testing of the maximum load quantity of a multichannel light fixture parallel circuit is characterized in that: may further comprise the steps:
Determine that an initial input voltage is V
0Parallel circuit, select N
1The cover light fixture is measured respectively and is respectively overlapped light fixture at the current value of rated operational voltage, upper limit operating voltage and lower limit operating voltage, then obtains respectively to overlap the average current value I of light fixture according to described three current values
1, again according to N
1The average current value I of cover light fixture
1Obtain the average current value I of whole parallel circuit;
According to
Calculate the line resistance R that respectively overlaps light fixture
1, in this formula, P is the resistivity of wire, and L is the conductor length of every suit light fixture, and S is sectional area of wire, and according to N
1The line resistance R of cover light fixture
1Obtain respectively overlapping in the whole parallel circuit average line resistance R of the wire of light fixture;
According to
Calculate the value of load light fixture quantity N maximum in the side circuit, wherein, V
0Be the initial input voltage of first set light fixture in the parallel circuit, V
1Be the lower limit operating 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, it is characterized in that: described upper limit operating voltage and lower limit operating voltage are respectively the parameter constant that keeps respectively overlapping under the rated operational voltage light fixture, upwards the higher limit during regulation voltage and the lower limit during to downward modulation voltage.
3. the method for testing of the maximum load quantity of multichannel light fixture parallel circuit as claimed in claim 2, it is characterized in that: the parameter of described light fixture comprises the electric current of the magnitude of voltage of input, 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 is characterized in that: as described N
1When the specification of cover light fixture was identical, each overlapped the average current value I of light fixture
1The average current value I of ≈ parallel circuit, each overlaps the line resistance R of light fixture
1The average line resistance R of wire in the whole parallel circuit of ≈.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN103364653A (en) | 2013-10-23 |
| CN103364653B CN103364653B (en) | 2016-09-28 |
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| CN201210104172.4A Expired - Fee Related 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737113A (en) * | 2020-12-23 | 2021-04-30 | 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 |
| US20080238404A1 (en) * | 2007-03-30 | 2008-10-02 | Liebert Corporation | Method and apparatus for monitoring a load |
| 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 |
-
2012
- 2012-04-10 CN CN201210104172.4A patent/CN103364653B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20080238404A1 (en) * | 2007-03-30 | 2008-10-02 | Liebert Corporation | Method and apparatus for monitoring a load |
| 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 |
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| 刘顺航: "用电器的串、并联能随意更改吗", 《中学生数理化》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737113A (en) * | 2020-12-23 | 2021-04-30 | 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 |
| 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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| CN103364653B (en) | 2016-09-28 |
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Granted publication date: 20160928 Termination date: 20190410 |