How can we choose and calculate the cost of LED tape
Title: Svetlinna LED strip 
In recent years, this LED strip has become especially popular. The name of the price is low and it is truly universal in relation to the application, that one has been used successfully for both decorative lighting and clarification. The main difficulty, with some difficulty, start looking for a story, and choose to store the block behind the LED strip (SL). Dnes sche opitame yes we will solve tozi problems.
Containment: 1. Principle for action on impulse protection 2. Main selection criteria 3. How can we calculate the power for storage for LED strip 4. Connecting LED strip 5. Differences between zashranvaneto and drivers
Principalt to work on the impulse data protection
Dnes for storing on LED tape this block is used, which is based on the principle of converting to impulse voltage. Objectives on tosi type protection e trace:
- Premahvane on intermediary tension.
- Protects the voltage of the primary winding on the transformer under the format for high-frequency pulses. Those work at frequencies above 20 kHz, and improved circuits on the SMPS spypit work at frequencies from 100 kHz.
- The voltage can be painted as desired with the help of a pulsed transformer.
- At the beginning of the stage, undervoltage is the corrige and stabilizer.
For example, considering the classic circuit for an impulse converter for a voltage of 220 V to 12 V AC, the Top242 chip is tilted at the top.
AC220 / DC12 V
The input voltage is intermittent, supplying the current converter, consisting of a diode bridge BR1 and smoothing the filter C1-C4, L1.Obtained by tosi, the voltage was constantly applied by supplying the DA1 microcircuit, at the top it was mounted a high-frequency (up to 100 kHz) generator, the transformer T1 was equipped at the top. The principle for working on a transformer is to change the cathotosi to a classic one. The only difference is that work on a temple of honesty, but it’s better for a comrade in a kasno way.
High-frequency voltage, dimmed up to 12 V, supplying the current converter (diode D3) and smoothing the filter (C9, C10, L1). At a certain time, the voltage was increased by supplying the pres of the optocoupler U1, the stabilization circuit, embedded in the DA1 microcircuit. All this is stabilized with the help of pulse width modulation (PWM), which is important to note.
With an increase in the initial voltage, the stabilization circuit (PWM controller) changes the operation of the cycle (duration) on the impulse, supplying the transformer, and effectively the initial voltage is drawn. If the initial voltage is firmly low, increase the pulse duration further. As a result, the output on the module is set to exactly 12 V, something that needs to be stored correctly on the LED tape.
How can you take advantage of the impulse protection of the transformer? Thy kato tension is transforming at a relatively high frequency, size and tegloto on the transformer, and from there and on the whole module, it will paint in response. Osvent tova paints them significantly - dozens of five. For the given reason, measure on the condenser and remove the paint. PWM modulation, from a different country, you allow yourself to give up the classic linear stabilizers, which have low efficiency and sophisticated cooling radiators.
The result is exceptionally compact and reliable storage with up to 95% efficiency.
Main selection criteria
Once you choose to save the block for SL, try and pay attention to the following main characteristics:
- Method for converting to voltage.
- Cooling principle.
- Execution.
- Initial voltage.
- Power
- Additional functionality.
Method on transform
Somehow, the Kazakh is on the mountain, it can be stored even if it is transformer or pulsed. If you need to protect the block with a relatively low power, then in a better way you will give preference to the pulsed design. Purchased at Seriozen TBP also pay for itself with a capacitance from the cost of electricity - UPS with the same power as the skypi and the frequency of the cooling fan, which makes noise and collects dust.
cooling
Cooling can be passive or active. In the first case, it is cooled on the block on the device, which is from a natural beginning, secondly for the basin, the fan serves as a whole. As for the power to protect the block e-nisk, then it’s better to refuse the device with forced cooling: the fan makes noise and is jammed from the air out of the air from the dust, the module is put aside at the top of the module. Takiva from the source is a perfect redovna support and nay - it is important to protect yourself from moisture.
Such a device does not itself make noise, but also the appearance of a dust-smoker.
execution
The degree of environmental protection depends on the design. If you want to keep the work open or in a damp / dusty flock, if you choose it is resistant to dust and moisture, or even better, the design is sealed. No dupki, no puknatini and, you know, no fans.For difficult mechanical conditions (vibrations, shocks, shocks, etc.), the device in a healthy metal case is ideal. For a normal living space, you can choose a module in an open housing with many ventilation openings - cool it down in a good way.
Sealed plastic sealed (clearly), opened metal, protected from dust, moisture, shock sealed (clearly)
Initial voltage
Here everything is simple. SL is offered in 2 voltages - 12 or 24 V. Read on a wrap or dori on a samata tape for which voltage it is intended. Next, select the save block that you need the parameters for.
Tozi SL is designed for 12 V, which means that it needs to be stored for a lower voltage.
Power
On tov zahranvane sa socheni somehow tokt, so is the power.
The power to store the block trebva and even more 15-20% higher from the consumerate from the tape (lentite) power. Vsichko izglazhda is simple, but I have only one warning. Row, but all cases are not stored, but not recorded on the storage, but even the maximum allowable current is set. How do you turn it into power? Elementary. Multiply the operating voltage (12 or 24 V) by the device, then from negativity the maximum allowable current in amperes and get the power in watts.
Tozi saves the block (picture on the mountain) showing power 20 W, current 1.67 A and voltage 12 V. Check for interest: 12 * 1.67 = 20.04 W.
Additional functions
Save the block behind the SL with a lifeless remote control and a graded dimer
In addition to the main work, the block can be protected by performing some additional functions.Ima, for example, devices with dimers (dimers), timers, automatic effects and dory lifeless remote controls. It’s up to your price, but keep in mind that every additional function is reflected in the price of the construct.
How can we calculate the power for storage for LED strip
Ako imate a calculator or a dori samo sheet charter with a chemical agent under the river, calculated on the storage of less than a minute. Osventova za tova is not enough special knowledge, enough 3rd degree for a secondary school.
In the first place, calculate the energy consumption for SL. For yes, send Comrade, there is a need for two parameters: the illuminator is long for the work and the power density is negligible. Long, sort it out, elect yourself, depending on the idea behind the design. The specific power of the LED tape is included in the friendly documentation and very directly at the top of the packaging. Unite on the same parameter W / m.
Yes, let's say you bought SL ccc specific consumption for energy from 14.4 W / m. Tova means that every meter from such a tape is still “out of the way” 14.4 vata. In this case, the voltage on the device is stored in the same value. For lighting, decide and use 3-meter SL. Nie broim: 14.4 * 3 = 43.2 vata. And so, your idea is still a consumer of 43.2 watts. For reliable work on the storage of that plant and ima, a (15-20%) reserve for power has been determined. Add a little margin to the result and get 50 vata.
According to Tozi, Imate need from a 50W adapter or better. Nai-probably in the standard series of storage of yama yes, you intend exactly such a capacity, so you can buy nai-close in terms of cost with more power. For example 60 watts.
So decide and save a little of the barrel with a single adapter, calculate the energy consumption for everything and add the result. Tape more to connect in parallel (look at the bottom of the diagram on the link), something meaning that they are capacitated by them all sumira.
Connecting LED strip
Connected to the "transformer" (adapter) kam LED strip is generally not difficult and hardly likely to cause difficulties. Here it is enough and solve 3 main questions:
- Correct this from the polarity to the vrzkata.
- Take the conductor from the required area.
- Choose a schematic for your connection.
Polarity on svarzvane
Take a good look at it carefully and intend to place the plus sign on the exit (exit or exit) of the cleme and where there is a minus sign. Ako, instead of sticking a conductor in the block, they will additionally bloom: in response, red “plus”, black “minus”. Send a photo with LED tape:
Polarity on vrazkat on SL and Neunoto zahranvane
Important! Colored on a conductor - red and black - conditionally. Many manufacturers do not adhere to the same standard, technical conductors can be protected from any color, so you can lead yourself from marking.
Selection for a straight section on a conductor
Now on a straight line. The fact that SL ce protects against relatively low voltage, without meaning that contrary to the protection of conductors, can be neglected. Conversely, a sharply low voltage is stored, an intelligent more current is still needed for power development.
For example, a current from just 300 mA (70/220 = 0.31) is pre-mined by a 70-watt plug with a voltage of 220 V, then a current of almost 6 A is also required for storage on a 12-volt LED strip!
Ako svyarzhete such a ribbon with a conductor thread, first, the tension is even lower at the top and the ribbon is half shiny. Secondly, prepare the conductors and they can heat it up and stop the fire. Therefore, the cross section on the conductor cannot be neglected.
How can you figure out how to keep the current flowing and protect the lines on the SL conductor? The calculation is simple. For yes, send the goods, and divide the power by the tape in watts by the saved voltage in volts. I’ll send the calculation uphill, show me, how the 70-watt 12-volt tape is still getting the current from 5.83 A. Ako ima nyakolko SL, togawa tyahnata power trebva and behold, add the front of the calculation.
How does the size per conductor depend on the current? Tuk dori do not need to be calculated, just cut off the squares along the valley and choose bodies with a completely cross-section not down from the preporchanoto:
Dependence on the straight section on the conductor on the current and length on the line (copper stranded zhitsa)
Current, A Cross section per conductor mm², not small, from length to line2 m 3m 4 m 5 m 6 m 8 m 10 m 1.60.30.40.60.70.91.11.430.50.81.01.31.52.02.54.10.71.11.41.82.12.93.68.51.52.33.03.84.56.07.5122.13.24.35.46.48.610.7162.94.35.77.18.611.414.3203.65.47.18.910.714.317.9254.36.48.610.712.917.121.4
Many times the diameter of the conductor to protect it, choosing to remove the cathode from the conductors from the adapter. You can't but send Comrade! Kolkoto for a long time, the line is protected, it is sensible in a naked way, and if there is a straight section on the conductor.
Election on the electrical diagram
Ako ima is the only SL, then the diagram on the link is still elementary, dori e shamefully yes I draw:
Scheme for the connection to the storage of the unit SL
It's a little bit difficult, but a little bit lazy. A typical sin for a beginner designer is connected to several main lines in series in one long line:
Incorrectly connected to the trunk of the kam single adapter
So, save the rails on the tape and those, as a rule, will burn out. And the togawa SL can be hacked. Ako ima is a bit lazy, the only correct decision can be yes, it’s the same:
Correctly connected to a short barrel kjm single adapter back kjm sdzharzhanieto ↑
Differences between zashranvaneto and drivers
Just a device, some osigureva stored on SL, se barka with driver for LED protection... Protected and driver sa completely different devices and in any case not tryabva and se barkat!
LED driver is essentially a current regulator. That by limiting the amount of current, opposing the LED and stabilizing the current to the given field, regardless of the goleminatum on the input voltage. Those are not insured against the unification, but they can and will burn out from the turnover on the right move (XX).
Do not follow the adapter for SL from the source of the current: that one is sensible, the sharp samata is a tape of an iziskva. The device itself is occupied by voltage stabilization itself, and a special current limiting resistor monitors the current in the SL. Ako tapeta all need, so to speak, from 12 V, togawa save it more give exactly 12, ty kato high-quality work on the illuminator on the tape depends on the tosi parameter. Takiva zahranvaniya ce insured against koso connection, but ce feel terribly at XX near zero current is emitted.
By the way, the adapter with the driver and the supplies is the same instead of a friend, in a better case, you will get a non-working design. In most cases, you will ruin either the lighting device or the source on the storage - it all depends on the characteristics and power of the equipment.
Such a brahma zahranvaniyata for LED lenti. Now you know how you need it and how it is necessary, you can choose tosi, from someone you need it, without outside help.
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