Thermal accounting requires information such as power loss, thermal resistance of the package, and ambient temperature. The power loss is the same as the power accounting, which is purely the value of the output input voltage difference multiplied by the input current. The thermal resistance should have a technical standard documented, and if it is not, it is necessary to ask the manufacturer. Basically, the thermal resistance and θja between the chip (junction) and the surrounding area (Ambient) are used. Although some ICs can provide the thermal resistance θjc to the case, it is still necessary to find the thermal resistance to the θja stop. The final is the ambient temperature, which can be calculated based on the additional value of the whole machine, such as 50°C. If the requirements are high, it is necessary to carry out actual measurements.
The idea is to find the heat of the IC chip based on the power loss and thermal resistance, and then add the surrounding temperature to find the temperature of the chip, and check whether the calculated Tj (chip temperature) does not have Tjmax (the maximum additional chip temperature). If Tjmax is exceeded, either condition must be changed. As explained in the preceding paragraph, not all of them can be used as standard, and they are limited depending on the output input voltage, output current, and ambient temperature.
Generally speaking, there should not be many examples that can change the input voltage or output voltage beyond the extra. It may be possible to reduce the load current (output current) as a way to deal with this. At this moment, it is necessary to choose the device that can receive the power supply with the lowest current consumption as much as possible. Other possible ways to reduce the ambient temperature are to reduce the ambient temperature. For example, we can change from natural convection air cooling to fan cooling, improve cooling capabilities if we already have fans, and re-evaluate convection. In addition, although there are ways to install heat sinks in linear regulators to reduce thermal resistance and reduce emissions, the cost and size of heat sinks must be a big discussion. In addition, from the viewpoint of increasing the power of the power supply and reducing heat generation, it is possible to consider the use of switching regulators described in the next item.
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Delixi inverter selection
1. According to the load type, confirm the type of inverter: different load types, speed requirements and power size, and the need to choose different types of Delixi inverters. Therefore, it is necessary to understand in detail the type of motor load to be controlled to find the most suitable type.
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Delixi integrated voltage regulator knowledge
The role of a voltage regulator is to convert an unstable DC voltage into a stable DC voltage. The integrated voltage regulator has a wider and wider range of applications due to its advantages such as small size, good voltage regulation performance and perfect maintenance function. There are two types of integrated voltage regulators: linear power supply regulators and switching power supply regulators.
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Delixi voltage regulator fault performance and elimination
Regulator problem 1: The regulator cannot be started
Reason: Whether the phase sequence of the input power cord has been changed, and the air switch in the machine is not turned on or broken.
Repair methods: 1. Swap the two power supply wires arbitrarily or check whether the power supply line is correct; 2. Close or replace the switch.
Voltage Regulator ...
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Instrumentation overhaul method - Delixi
Contrasting method
The specific method is to let the problematic meter and the normal meter operate under the same conditions, and then detect the signals at some points and compare the two sets of signals measured, if there are differences, you can conclude that the fault is here. This method requires maintenance personnel to have considerable knowledge and skills.
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Introduction to the type classification of voltage regulators - Delixi
Voltage regulators have become an integral part of many appliances in household, industrial, and commercial systems. Earlier, manually operated or switchable regulators were used to raise or lower the input voltage to supply the output voltage within the desired range. This stabilizer is built with electromechanical relays as switchgear ...
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The reason why the switch socket is hot - Delixi
1. The socket quality is low quality
First of all, we should check whether the socket is a miscellaneous and inferior product, the copper clamping force in the defective socket is not good, resulting in poor contact between the socket and the plug, and the socket and plug will heat up after a long time of electrical use. So be sure not to buy cheap miscellaneous ...
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Capacitor identification method of Delixi inverter
1. The capacitance is generally indicated by "C" plus a number in the circuit (e.g., C25 indicates the capacitance numbered 25).
A capacitor is an element composed of two metal films that are placed next to each other and separated by an insulating material. The characteristic of the capacitor is first and foremost the communication through the DC block. The size of the capacitance is ...
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Delixi product parameter unit VF and V difference
Voltage vf and v difference: The two have different meanings, vf on the battery represents the feedback voltage, while v represents the capacity of the battery, which is the unit of measurement of voltage. Lithium battery is a kind of battery with lithium metal or lithium alloy as the positive/negative electrode data and the use of non-aqueous electrolyte solution.
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Delixi voltage regulator power selection
1. The output power of Delixi voltage regulator is the maximum power
Basically, most of the nominal power of household appliances refers to active power, and the so-called refrigerators, air conditioners and those water pumps used in the home, etc., most of them are also rational loads that start instantaneous currents.
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Precautions for the use of Delixi three-phase AC voltage regulator
There are many types of three-phase communication regulators in Delixi, the most commonly used ones are SJW and SBW, etc., so we need to pay attention to the process of application:
First of all, it must be operated correctly according to the instructions of the voltage regulator.
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Delixi circuit breaker product characteristics classification
The function of Delixi circuit breaker is to make the circuit breaker internal electromagnetic tripping when the electrical equipment produces short circuit, overload, etc., resulting in the circuit breaker disconnecting the power supply, and maintaining the safety of electrical equipment and personnel.
When the electrical equipment is running, the circuit may produce abnormalities, which is the demand circuit breaker in the ...
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Delixi time control switch adjustment
Press the revoke function key first, then press and hold the school time function key, then adjust the time and date to the current moment, press the punctual function key again, adjust the time when the demand is closed and open to the specified value, if the demand is set to multiple groups, then press the punctual function key to set, without multiple groups ...
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Delixi three-phase circuit breaker classification
Delixi's three-phase circuit breaker is generally divided into three types, namely 3P, 3P+N and 4P.
(1) Differences:
3P: Pure three-phase electrical equipment only uses three wirings, and in the case of no single-phase load, it trips when it is short circuited to ground or phase; Otherwise, when a one-phase N-line load is generated, the N-line is disconnected ...
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Delixi control transformer use precautions
Delixi control transformer is the most used type is BK, JBK, BKC and other types, these transformers use some precautions as follows!
1. Before purchasing, estimate the total capacity of the electrical appliances used, and choose a transformer with a certain capacity to ensure that it will not burn out when it starts instantaneously.
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Delixi inverter selection points
Variable-frequency Drive (VFD) is an electric power control equipment that uses frequency conversion skills and microelectronics skills to control and communicate motors by changing the frequency of the working power supply of the motor. The inverter is mainly composed of rectifier (communication to DC), filtering, inverter (DC to ditch) ...
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Delixi inverter selection principles and steps
Inverter selection is a skill, if the selection is not appropriate, it may damage the inverter explosion, and seriously affect the normal production of the factory, so it is very important to select the inverter scientifically and reasonably. The following are the principles of inverter selection:
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Delixi launched a new 6 series CDW6i frame circuit breaker
At the end of July, Delixi Electric launched a new 6 series CDW6i structural circuit breaker and a number of industrial control accessories.
The new 6 series CDW6i structural circuit breaker has complete product specifications, which can provide professional customers with more choices, excellent functions, and ...
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Delixi CDI-EM60 series inverter
Delixi CDI-EM60 series inverter is a high-performance inverter, with the following characteristics and use:
Characteristic:
1. It has good stability and reliability to ensure the stability and safety of the system operation.
2. High degree, wide range of speed control, ...
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Is a circuit breaker an air switch? - Delixi
1. Circuit breaker refers to a switchgear that can turn on, carry and turn off the current under normal circuit conditions and turn on, carry and turn off the current under abnormal circuit conditions within a regular time.
According to the voltage of Delixi circuit breaker, there are high-voltage circuit breakers and low-voltage circuit breakers. Below 1kV ...
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Delixi frequency converter E series precautions
1. Before the inverter device is in place and debugged, please tighten the components, especially the connecting bolts of the wire part, if not tightened, the connection will be heated and cause fire.
2. The on-site planning of the installation should be reasonable, and the excellent ventilation environment should be maintained.
3. The incoming and outgoing power lines of the inverter are not ...
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