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You may find the answer in my new page:
http://www.welding-advisers.com/High-Frequency.html
that you may copy in your site, if you like it, provided you maintain a Reference Link to the source.
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Elia Levi
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Explain seam welding and percussion welding?
Seam welding- resistance welding process involving the use of (normally) copper or copper alloy rollers to simultaneously pass high current (10^4 amps and usually in pulses) and apply pressure to bond a lap seam between two pieces of sheet metal. Percussion Welding- arc welding process involving the use of a capacitor bank to bond on the order of milliseconds. A high current electric arc is developed between the items to be joined, and the items are rapidly accelerated together.
Do living cells have a high resistance to electric current?
yes
Why the high resistance earth fault in the appliance increase the risk of electric shock when using appliance in earth situation?
If the earth connection has a high resistance it is not capable of acting as a true earth. For example, the high resistance might mean that the fuse or circuit-breaker will fail to operate when there is a fault.
What is the effect of bypass capacitor on frequency response?
Gain in a CE configuration of a BJT is collector resistance divided by emitter resistance, subject to the limit of hFe. The emitter bypass capacitor will have lower impedance at high frequency, so the gain will be higher at higher frequency, making this a high-pass amplifier.
Why capacitor short circuit in ac and open circuit in dc analysis?
Reactance of capacitor is inversely proportional to frequency. I should not need to write the exact equation here, its in your textbook. All you need is that its inversely proportional to frequency for proof.We will now assume an ideal capacitor to keep the analysis simple.at DC the frequency is zero, the inverse of this is infinite reactance: open circuitat low frequency AC frequency is low, the inverse of this is high reactanceat midrange frequency AC frequency is midrange, the inverse of this is midrange reactanceat high frequency AC frequency is high, the inverse of this is low reactanceat infinite frequency AC frequency is infinite, the inverse of this is zero reactance: short circuitThis disproves your original statement as written, except for the special cases of DC and infinite frequency AC (which does not occur), for ideal capacitors.As all real capacitors are nonideal, they have leakage resistance. This means that even for the special case of DC the capacitor is not a true open circuit, just a very high resistance resistor. Which also disproves it for the remaining case of DC in real capacitors.
What is high frequency welding?
High frequency welding is a process where plastics such as PVC are heated with high frequency waves. This is to soften the plastics for easier molding.
What is the difference between arc welding and resistance welding?
Arc welding uses an electric arc to melt and join metal pieces together, while resistance welding uses heat generated by the resistance to electric current flow between two metal pieces to join them together. Arc welding is more versatile and can be used for various types of metals, while resistance welding is more suited for high-speed production and is commonly used in automotive and appliance manufacturing.
What has the author Robert K Nichols written?
Robert K. Nichols has written: 'High frequency pipe & tube welding' -- subject(s): Pipe, High Frequency welding, Welding
What is electric resistance welding?
Electric resistance welding (ERW) is a welding process that joins materials, usually metals, by applying heat generated from electrical resistance to the workpieces. During the process, a high electric current passes through the materials, creating localized heat at the interface where they are pressed together. This heat causes the materials to soften and fuse, allowing for strong, permanent joints. ERW is commonly used in manufacturing applications, such as producing pipes and tubes, due to its efficiency and ability to create consistent welds.
What is the temperature of resistance spot welding?
Resistance spot welding typically occurs at temperatures between 1,800 and 2,500 degrees Celsius at the welding point. The high temperature is generated due to the electrical resistance between the workpieces, causing them to melt and fuse together.
What type welding current may be used with GTAW?
A C, with high frequency superimposed, when welding Aluminum. D C straight polarity on almost everything else.
Explain seam welding and percussion welding?
Seam welding- resistance welding process involving the use of (normally) copper or copper alloy rollers to simultaneously pass high current (10^4 amps and usually in pulses) and apply pressure to bond a lap seam between two pieces of sheet metal. Percussion Welding- arc welding process involving the use of a capacitor bank to bond on the order of milliseconds. A high current electric arc is developed between the items to be joined, and the items are rapidly accelerated together.
What is the name for a material that has high resistance?
The material is called a insulator. It has high resistance to the flow of electric current.
What generates the heat for fusion in resistance welding?
In resistance welding, the heat for fusion is generated by passing a high electrical current through the materials being welded. The resistance of the materials to the flow of electrical current causes them to heat up rapidly at the interface, melting and fusing together.
What welding process uses a resistive heating system to achieve metal deposition?
The welding process that uses a resistive heating system for metal deposition is known as Resistance Welding. In this process, electrical resistance is utilized to generate heat at the interface of the materials being joined, which causes them to melt and fuse together. This method is commonly used for spot welding and seam welding, particularly in the automotive industry for joining sheet metal components. The efficiency and speed of resistance welding make it suitable for high-volume production.
Do living cells have a high resistance to electric current?
yes
What material has high resistance to the flow of electric current?
The material that has high resistance to the flow of electric current is called an insulator. Examples of insulating materials include rubber, glass, and plastic.
