RF cable can be customized for other specifications

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

The large number of applications of frequency converters in production and process control has brought about a new problem: due to the harmonics generated by the operation of the inverter, the system or instrument closer to the inverter has interference problems, such as some instruments. Large measurement errors, some instruments can not even work properly, and even the system malfunctions.
The frequency converter generates harmonics with large power, and the interference path is consistent with the general electromagnetic interference path, that is, the interference voltage or current is generated through circuit coupling, electromagnetic radiation, and inductive coupling. The main sources of interference affecting the instrument and control system are: strong electromagnetic field at the scene, fluctuation of the power supply.
At the scene to determine whether it is the interference generated by the inverter? It is easier to judge other interferences. When the interference occurs, stop the inverter. If the instrument and the system return to normal immediately, you can be sure that the interference is caused by the inverter, and you should take corresponding measures.
For the disturbance of the power supply, it is only necessary to select the multi-shielded isolation transformer, and select and process the filtering and voltage regulation of the instrument power supply. However, the interference of strong electromagnetic fields is much more complicated to deal with, and it has a greater impact on the instrument and is more difficult to solve. Because such interference generates induced voltages in the circuit of the meter or system due to electromagnetic induction, thereby affecting the normal operation of the instrument and the control system or the normal operation of the program.
The following measures can be taken at the site to overcome the interference generated by the inverter: 1. Add a filter circuit to the instrument loop to block or bypass the interference signal. When the meter has a digital filtering function, a certain time constant can be set to suppress interference. 3. Use a shielded cable for the signal cable and ground the shield at a single point. 4. Connect a 4.7 μF/100V capacitor in parallel with the output signal terminal of the transmitter or connect the capacitor to the ground at the output signal line. 5 The negative end of the signal line must be grounded. 6. A signal isolator is used.