Filtering: in the power supply circuit, the rectifier circuit changes the AC into pulsating DC, and after the rectifier circuit, an electrolytic capacitor with a large capacity is connected, and the charge-discharge characteristics are utilized. The pulsating DC voltage after rectifying is changed i

Bypass (decoupling): provides a low impedance path for some shunt elements in an AC circuit. In electronic circuits, decoupling capacitors and bypass capacitors play a role in anti-jamming, capacitance in different positions, the address is different. On the same circuit, the bypass capacitor is to

Isolated DC: the function is to prevent the passage of direct current and allow the AC to pass through. Coupling: as a connection between two circuits, AC signals are allowed to pass through and transmit to the next level of the circuit.

Harmonic treatment measures. To deal with harmonic problems and to suppress the interference of radiation and power supply system, shielding, isolating, grounding and filtering can be adopted. 1. Using passive or active filters.2. The method of increasing the capacity of transformer, reducing the im

Related Standards for Harmonic ControlFrequency converter harmonic control should pay attention to the following several standards, anti-jamming standards: en 50082-1, -2n 61800-3: radiation standard: en 5008l-1, -2. EN61800-3. Especially IECl0003, IEC l800-3(EN61800-3), IEC555(EN60555) and IEEE519-

What are harmonics? The fundamental cause of harmonic generation is caused by the nonlinear load. When the current flows through the load, there is no linear relationship between the current and the applied voltage, so that the non-sinusoidal current is formed and the harmonics are generated. The ha

To sum up, we can clearly understand the causes of harmonic, in the specific treatment passive filter, active filter can be used to reduce loop impedance.Cutting off the transmission path of harmonics and developing and using the green inverter without harmonic pollution, the harmonic produced by th

The operating voltage of shunt capacitor must be strictly controlled within the allowable range. That is, the long-term operating voltage of shunt capacitor must not be greater than its rated voltage value of 10, the operating voltage is too high, will greatly shorten the service life of the capacit

In the normal environment, it is generally required that the hottest temperature of the shunt capacitor shell should not be greater than 60 ℃, otherwise, the cause must be found out and treated.

Shunt capacitors should be checked regularly, at least once every quarter, mainly to check whether there is dirt such as dust accumulation in the shell of capacitor, porcelain casing, installation support and so on, and to carry out a serious cleaning. Inspection should pay special attention to the