The toroidal core on the inverter output end eleven effects

(1) please use separate power supply frequency converter, away from the high frequency high power dc arc welding machine, welding machine's own grounding should be good. (2) and frequency converter in the same electric cabinet should choose high quality contactor contactor, had better choose arcing products with good effect, and keep a certain distance with frequency converter. (3) the power supply voltage to avoid mutation, more stable. (4) inverter grounding end to correctly. (5) line is separated from power line to walk the line, can't put in the same trough. Use shielding wire line, best can wear a pipe line, metal hose connected to good. (6) with the circular frequency converter input and output end, parallel and around 3-4 laps, helping to suppress high order harmonic. If further enhance anti-jamming effect, can be mounted to the reactor, filter, etc. (7) on the inverter control line or analog signal with the circular. RS485 communication port (8) are connected to the PC using photoelectric isolation. (9) to reduce the carrier frequency. (10) on interference instrument equipment to shield, shielding enclosure grounding, right in the instrument of power into the terminal with the circular, the signal wire side filter capacitance. (11) on the line end and inductance, etc. The role of copper in PCB circuit design to select the right magnetic beads, must pay attention to the following: 1, don't need the signal frequency range is how much; 2, who is noise source; 3, how much noise attenuation; What is 4, environmental conditions (temperature, dc voltage, the structural strength); How much is 5, circuit and load impedance; 6 is there any space to placed on the PCB board, magnetic beads; Circular and the first three by observing the manufacturer to provide the impedance of the frequency curve can be judged. Three curves in the impedance curve is very important, namely the resistance, inductance and the total impedance. The total impedance by ZR22 PI fL (2 +) : = fL. In the hope that through this curve, selection with maximum impedance and attenuation of noise frequency range under the low frequency and dc signal attenuation model as far as possible small magnetic beads. Chip magnetic beads under excessive dc voltage, impedance characteristics will be affected, in addition, if the working temperature is too high, or the external magnetic field is too large, the impedance of the magnetic beads will be affected by the bad. Using electronic magnetic ring and chip inductor reason: is the use of electronic magnetic beads or chip inductance main also lies in the application. You need to use the chip inductor in the resonant circuit. And the need to eliminate EMI noise, you don't need to use chip magnetic bead is the best choice. Electronic magnetic beads and chip inductance applications: chip inductors, radio frequency (RF) and wireless communications, information technology equipment, radar detector, cars, cellular phones, pagers, audio equipment, PDAs (personal digital assistant), wireless remote control system, and low voltage power supply module, etc.