About TEC temperature control:
TEC:also called semiconductor refrigeration film, or thermoelectric refrigeration film, which uses the Peltier effect, that is, when direct current flows in different directions through a couple of two different semiconductor materials in series, the heat generated is unidirectional Flow effect, which can achieve the purpose of cooling or heating, and made a semiconductor chip device.
TEC temperature control board:use DC power supply, use TEC as the temperature control element, use a temperature probe to detect the temperature of the controlled object, and use PID algorithm inside the temperature control board to adjust the size and direction of the current supplied to the TEC element in real time, so as to achieve The purpose of constant temperature.
- Long-term verification in the field of industrial lasers.
- High stability (+-0.01), universal TEC temperature control.
-Two-way temperature control, automatic switching between heating and cooling, supporting various types of TEC; can also be set to one-way mode, supporting one-way devices such as resistance wires and ceramic heating rods.
-For temperature probe, the standard version supports 10K NTC by default, and PT100/PT1000 versions are available for selection.
-Can run independently. Parameter viewing and setting can be connected to the display screen, or other single-chip serial port control, or use general-purpose serial port software or dedicated upper computer software.
-Support multi-channel control, with specific documentation.
-Accessories: plugs and ferrules for board docking; NTC version comes with a 10K NTC by default, the same specifications as shop NTC.
model:TCB-NA(TCB-NC/NE simplified edition)
this board is small in size and has high cost performance. It is suitable for occasions requiring high-precision temperature control and high TEC power, such as the temperature control of LD laser diode. Note that before selecting NA, be sure to see the following "TCB-NA Special reminder".
Temperature control panel selection table:
temperature control board model
|
stability
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TEC drive capability
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electric voltage (V)
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Size (mm)
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characteristics
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link
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TCB-NE
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0.01
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10A@24V /12A@12V
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5-24
|
75*65
|
General version
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TCB-NE
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TCB-NE-AH
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0.01
|
18A@24V /24A@12V
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7-24
|
95*65
|
general version, enhanced power
|
NE-AH
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TCB-NC
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0.01
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10A@24V /12A@12V
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5-24
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60*42
|
NE smaller version
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TCB-NC
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TCB-NA
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0.1
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12A@24V /15A@12V
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5-24
|
60*42
|
NC simplified edition
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TCB-NA
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TCB-SV
|
0.01
|
4.5V2.5A
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7-24
|
60*42
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suitable for small TEC
|
TCB-SV
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TCB-SA
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0.01
|
4.5V3A
|
5
|
60*42
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suitable for small TEC
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TCB-SA
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TCB-SS
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0.01
|
4.5V3A
|
5
|
40*40
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SA smaller version
|
TCB-SS
|
TCB-NA Special reminder:
TCB-NAit is a product with small volume and high cost performance. It has been applied to the temperature control of LASER DIODE in large quantities and has been applied for more than 15 years. Its principle and reliability have been verified for a long time. However, compared with other models of our company, pay special attention to the following points when using TCB-NA:
1. The electric voltage of the TCB-NA board must be less than or equal to the fixed voltage of TEC to avoid the overload of TEC, that is, the output of the TCB-NA has no voltage limit function, other temperature control boards (NE // NE-AH/NC/Sx) can limit the output voltage through instructions.
2. TCB-NA control mode will increase the ripple of electric switching power supply,if there are other boards or devices that are sensitive to the ripple of the switching power supply, do not share a switching power supply with NA. In this case, power NA alone.
3. Compared with higher TCB-NA, TCB-NE not only has low temperature control resolution, but also has a cooling efficiency of about 10%.
The divisionTECthe temperature control panel is specially designed for the temperature control system using semiconductor refrigerating plate (TEC), and adopts innovative design scheme., high reliabilityTECvoltageand currentwide range. NAtemperature control stability is +-0.1the serial port is used to directly modify the set temperature or summon information. Provides an alert ready interface. This plate has been widely used in the laser field for a long time.
Product features:
Digital integral separationPIDalgorithm with adjustable parameters and periods
0.1 high precision temperature control, +-0.1 ° stability
no additional heat dissipation measures are required, and no heat dissipation bottom plate is required.
High precision voltage reference, temperature measurement accuracy is guaranteed to be +-0.25 °, full range +-0.5 °, and can be corrected
board electric voltage:depending on TEC
TECmaximum applicable range of voltage: 5V~24V
TEClarge current range:10A(24V electricity),12A(12v Electricity)
two 12706 in parallel, or two 12710 in series
bidirectional Control, heating and refrigeration (can be configured as single heating or single cooling through the communication protocol)
heating elements such as ceramic and resistance wire in single heating mode
you can set and detect the temperature through a serial port (ASCIIcode protocol, instructions)
alarm, ready signal output, yesDISABLE TECoutput
control mode:PWM &ON/OFF
Recommended applications
the temperature control element isTEC (semiconductor refrigerator, thermoelectric refrigerator)the temperature control system
applicable but not limited to temperature control of laser diodes
applicable in various fields such as industry and household appliances
Parameter table
board electric voltage:basisTECdepending on the voltage, the electric voltage isTECvoltage
board electric current:basisTEChowever, the rated current of the electric switching power supply should be greaterTECcurrent
TECvoltage: 5V - 24V
TECelectric current:10A(24V electricity),12A(12v Electricity)
temperature sensor:10K NTC(Bdefault value3950, actualBthe value can be unlimited. It only affects the temperature and does not affect the relatively stable temperature. It is basically meaningless for temperature control. When the value B is 3950, the initial error of the probe itself is not considered, the measurement error is within 0.1)
temperature control resolution:0.1 °
set temperature resolution:0.1 °
stability: +-0.1 °
temperature measurement range of NTC version:-60 ° ~ +170 °
NTC version control temperature range:-20° ~ +100Degree
PT version temperature measurement range:-60 ° ~ +212 °
PT version control temperature range:-50° ~ +200°
Boundary dimension:60mm*42mmheight23mm(Board18.5mm, plate thickness1.5mm, the pin under the board cannot exceed3MM)
board control mode:
this board uses serial communication to modify and monitor information. There are several control methods:
1. Our special display screen DISP-TCB(Connect the serial port of the temperature control board to the display screen)
click link: DISP-TCB temperature control display screen
2. Our company's dedicated PC software TCBMate(Connect the serial port of the temperature control board to the computer)
3, directly use serial port to send commands to control (single chip microcomputer, or PC), refer to the communication protocol section of the instruction manual
system diagram:
as shown in the following figure, to form a complete temperature control system, in addition to the temperature control board, it is also necessary to select the appropriate TEC according to the actual needs of the project (TEC models are many, different, different sizes, different current and voltage), A suitable switching power supply is also needed to supply direct current to the board, and a temperature probe is also needed. If it is an NTC version of the temperature control board, our company will attach a 10K NTC probe by default. If it is an PT version, customers are required to purchase. Then, according to different methods of viewing and modifying parameters, appropriate serial port lines may also be needed. The application materials of our company have instructions on serial ports.
Signal connection diagram:
as shown in the following figure, the connection method of the temperature control board of our company is similar, that is, connecting the probe (the two feet of the probe have no direction), connecting the TEC (the TEC has direction, and there is a description of the connection method), connecting the wires, note that the wires must not be connected back to the serial port control line.
?Othe note:
1. About TEC
When considering the current-voltage relationship of TEC, TEC can be simply understood as a resistor, such as a 12V6A TEC, which can be regarded as a 2 ohm resistor. Then give this TEC 6V drive voltage, its output current is 3A. Limiting the maximum current of the TEC is the same as limiting the maximum voltage. Limiting the maximum driving voltage of the board to the TEC is also equivalent to limiting the maximum current of the TEC. The board has the SU instruction to limit the maximum output voltage (except TCB-NA). TEC can work in parallel or in series. For example, two 12V/4A TECs become 24V/4A in series, and 12V/8A in parallel.
2. About the temperature sensor
The default temperature sensor used by our temperature control board is: Thermistor (10k NTC, B value 3950). Some boards support the selection of another commonly used temperature sensor: thermal resistance (PT100 or PT1000). If it is thermal resistance, our board adopts two-wire measurement method.
The thermistor and thermal resistance have no difference in accuracy. The accuracy is determined by the measurement circuit, not by the sensor. It is generally recommended to use NTC. NTC has the advantages of small package, many types and manufacturers, cheap and easy to use. The advantage of PT100/PT1000 is that it has a wide range of temperature measurement and control.
3. Call information about serial port, set temperature, monitor temperature
If you use a computer to view and set the parameters, you need to make a serial cable (available in our shop) to connect to the computer. If your computer does not have a serial port, you need to buy another USB to serial cable. For details, please refer to the description of the document <<Serial Communication Guidelines>>.
4. About the interface
The manual has detailed interface definitions. The board interface uses 2510 terminals. The manufacturer will provide plugs and ferrules, and no additional purchase is required.
5. About stability
The stability of temperature control, such as +-0.01, that is, the temperature of the controlled object in the normal system can be stabilized within +-0.01 of the set value. Generally speaking, for temperature control systems, the most important parameter is stability.
But note that people who have no practical experience in temperature control applications may have deviations in their understanding of stability!
The temperature control boards of our company have been tested on our load, and the marked accuracy parameters can be confirmed to be achieved, such as +-0.01 stability! Note, however, that the nominal rating can be achieved, which does not mean that the customer can simply build a system to achieve it! Because temperature control is a system, the temperature control board is only one of them. For example, the installation method of the probe has a great influence on the temperature control effect. For details, please see the instructions on the product manual and the application data. Another example is the temperature control range, the nominal range of the board, which means the range supported by the board's algorithm, not that it can be achieved with this board. For example, the board's nominal minimum can be controlled to -20 degrees. If the user's TEC power is not enough, or the object design has other problems, such as poor heat dissipation, let alone -20, even 0 degrees may not be reached.
6. Regarding temperature accuracy
Accuracy represents the error between the current measured temperature and the absolute true temperature in a physical sense. For general systems, this value is not important, because for example, the currently measured measured temperature is 25 degrees, and the absolute true temperature is 24.5 If the object is stable at the measured temperature of 25 degrees, the object is also stable at the true temperature of 24.5 degrees. This is enough for a general system. As for the current real temperature, it does not matter (for example, for laser applications, it is necessary to adjust to find an optimal temperature to obtain the best output). However, if the temperature measurement accuracy is high, it is also beneficial. One is that some applications may require high accuracy (for example, to achieve a certain temperature scene to measure other characteristics of the object), the other is high The accuracy can realize the interchangeability of the boards, that is, for the same controlled object, even if the temperature control board is changed, as long as it is set to the original setting value, there is no need to find an optimal temperature again. If the customer has requirements for accuracy, if the accuracy of the board itself cannot meet the customer's requirements, you can calibrate to meet specific needs according to the calibration and accuracy assurance methods provided by our company.
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