An inverter ac PCB board usually is the PCB with multi-inputs and high-voltage outputs. For a large-screen television, if there's an LCD panel with modulator tubes in it, an inverter PCB or inverters used for separate outputs would be common solutions. Also, because of the high voltage, many clients require components of inverter PCB board, such as inverter transformers, PCBs, and output sockets, which are products of Underwriters Laboratories recognized materials or products with corresponding fire resistance. In this way, safety can be guaranteed.
Right now, according to China Compulsory Certification, there are several aspects to consider during the safety evaluation of PCB board for inverter:
Temperature Rise: testing whether there will be extremely high temperatures which can be potential threats to human safety and normal operation, in components, be it in normal operation or in single fault.
Fireproofing: testing whether the inner components like inverter transformers and PCBs, which can easily generate high temperatures, are fireproof or not, or testing their fireproofing ability so that an inverter ac PCB can prevent itself from the ignition and be the cushion and prevention of the spread of fire when other components are on fire.
Dielectric Withstanding Voltage: testing whether the insulation of the inverter transformer can withstand the high voltage and won’t let the high voltage affect the low-voltage input.
Current-limiting Circuit: inverter PCB board produce high voltage and power modulator tubes of the LCD panel. However, there exists the possibility that the user may touch the voltage generated by inverters when the LCD is broken. In such a condition, we cannot directly lower the output voltage but limit the current to secure users’ safety. Therefore, tests based on the current limiting circuit are especially important during a product safety test. If a company reports related information of an inverter of an inverted PCB, current-limiting tests need to be done to the inverter.
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Alternating current (AC) is a current that varies periodically in magnitude and direction from time to time. PCB board in AC has a running average of zero over a period. Unlike direct current, its direction changes over time.
There are two types of currents in circuit board circuits: AC and DC, which play different roles in the circuit. Their main difference is: AC circuit is a conversion of the direction line, and DC circuit is not, but for purely resistive circuit, AC, DC circuit is no difference, and in not purely resistive circuit, because of the existence of capacitance and inductance, capacitance and inductance of the two kinds of circuit induction is not the same, so there is the difference between AC circuit and DC circuit.
AC is the current from the transformer on the board, in the process of current flow to pass through the diode, in the subsequent is DC. In the circuit board if there is no voltmeter, at this time to distinguish between DC or AC method of general method is: to see if there is a rectifier diode can determine whether there is no AC in this circuit. If you find no rectifier diode, in this case the circuit is no AC, the board up is DC; now the rectifier circuit is mostly bridge rectifier, if the circuit has a "full bridge", then in the "full bridge" before the AC power In the "full bridge" after the DC.
Line board AC, DC distinction is mainly based on whether the rectifier diode is found, in general, if the rectifier diode is found, it is the AC circuit, there are many ways to judge, it takes a long time to accumulate and try to accurately distinguish the DC circuit, or AC circuit.
The inverter circuit board works through a control circuit to control the operation of the whole system. The inverter circuit performs the function of converting DC to AC, and the filter circuit is used to filter out the unwanted signals. The work of the inverter circuit board can also be refined as follows: firstly, the oscillation circuit converts DC to AC; secondly, the coil boost changes the irregular AC to square wave AC; finally, the rectification makes the AC change to sinusoidal AC via square wave.
Inverter Circuit is the counterpart of Rectifier, which turns DC power into AC power and is called inverter. Inverter circuits can be used to form various AC power supplies and are widely used in industry.
The development of inverter technology has always been closely integrated with the development of power devices and their control technology.
The design of the main circuit of the inverter requires a control circuit for its implementation.
The design of the PCB naturally becomes an important part of the hardware design.
SPEEDA provides great inverter PCB design for customers to meet their different demands.We also have the competitive inverter circuit board price.
Inverter ac pcb board is generally used for air conditioner system, applied to air conditioning circuit board of all brands. Meanwhile, inverter ac pcb board is commonly used in repairing process of air conditioning circuit board of all brands, and repairing parts as well as general air conditioning control system.
Besides, inverter ac pcb boards are genrally used in home thearters, electric sanders, power tools, sewing machines, DVD, VCD, computers, TVs, washing machines, refrigerators, lighting devices, etc,.
Speeda provides high quality inverter ac pcb board for many years. There are all types of products for your different needs, commonly used in general AC compressor. Customers can click Speeda to find more information.
Inverter ac pcb board has following basic characteristics.
-overheating protection and changing
-freezing proofing protection
As for the definition of inverter ac pcb board, we can divide into three parts to identify.
Inverter is the transformation of direct current into alternating current. Generally speaking, an inverter is a device that converts direct current into alternating current. It consists of an inverter bridge, control logic and a filter circuit.
An AC circuit is a circuit in which the electric potential of the power supply varies periodically from time to time, causing the voltage and current in the circuit to vary periodically from time to time.
PCB is an important electronic component, a support body for electronic components, and a carrier for the electrical interconnection of electronic components.
Above all the statements, we can know that inverter ac pcb board is the PCB with multi-inputs and high-voltage outputs.
To start inverter ac pcb board design usually follows three steps:
1.Determine the topology according to the power level and output requirements. And determine the circuit parameters of each part according to the specific design requirement, then draw the schematic diagram and perform simulation.
2.Draw the inverter ac pcb board and make the printed board throught the manufacturer.
3.Debug the board and test running. The common parameters of inverter in step 1 include switching tube voltage stress and power loss, bus filter capacitor capacitance, output LC filter parameter design and pi parameter adjustment in the control loop.
Above all is general steps of starting inverter ac pcb board design.
1.Inverter ac pcb board should be placed in a ventilated and dry place, protected from rain, with a distance of more than 20cm from surrounding objects, away from flammable and explosive materials. Avoid placing or covering other items on the machine, and use an ambient temperature of not more than 40℃.
2.Charging and Invertering can not be carried out at the same time. It means that the inverter can not be charged plug into the electrial circuit of the inverter output.
3.Please wipe with a dry cloth or anti-static cloth to keep the inverter ac pcb board neat and clean.
The inverter circuit board is only a part of the inverter. Commonly used inverters are generally first filtered circuit, then boost circuit. The DC voltage is raised, followed by a full-bridge or half-bridge inverter circuit, reverse into AC, and then filtered output again. In between there may be isolation transformers, various sampling circuits, control sections, leakage current protection and other configurations, which vary according to the products of different manufactures.
With high conversion efficiency and fast start-up, good safety performance, good physical performance and strong adaptability and stability with load, inverter pcb can be used in a wide range, including:
1.Office equipment: computers, fax machines, printers, scanners, etc.
2.Life appliances: game consoles, DVDs, stereos, video cameras, electric fans, lighting lamps, etc.
3.Charge batteries: batteries for mobile phones, electric shavers, digital cameras, camcorders, etc.
Based on safety and performance considerations, the installation environment of inverter pcb board should have the following conditions.
1.Dry: no water immersion or rain.
2.Shade: temperature between 0℃ and 40℃.
3.Ventilation: keep no foreign objects within 5cm, and other ends are well ventilated.