The testing method of thefrequency conversion series resonance test setdevice is to change the inductance and testing frequency of the testing system to make the circuit in a resonant state. In this way, most of the capacitance current on the test object in the test circuit is offset by the induced current on the reactor. The energy provided by the power supply is only the working power consumed by the circuit, which is 1/Q of the tested capacity (Q is the resonance multiple of the system), greatly reducing the capacity and weight of the tested power supply. The complete set offrequency conversion series resonance test equipmentcan be divided into two categories: induction type and frequency modulation type. The adjustable inductance resonance test system can meet the withstand voltage requirements, but due to its large weight and poor mobility, it is mainly used in laboratories. The variable frequency series resonance test device is a new type of high-voltage test method and power flow, which has been widely used at home and abroad. The complete set of variable frequency series resonance test device is a resonant current filtering circuit that can improve the waveform distortion of the power supply, obtain a better sine voltage waveform, and effectively prevent the measured object from being mistakenly broken down by harmonic peak values.
The complete set ofvariable frequency series resonance test equipmentconsists of a variable frequency power supply, excitation transformer, reactor, and capacitive voltage divider. The internal structure is relatively complex, and if unfamiliar, there may be electrical hazards. To avoid electric shock or personal injury, and to avoid damage to the instrument, test sample, and equipment, please read this user manual carefully before using the variable frequency series resonance test equipment. At the same time, here are some common knowledge about the electrical safety of the variable frequency series resonance test equipment:
1. The power cord and electrical equipment have good insulation. The live parts of the lamp head, socket, and switch shall not be exposed to prevent electric shock.
2. It is strictly prohibited to randomly pull or connect wires to avoid electric shock or fire.
3. Do not move charged objects on damp ground to prevent electric shock.
4. The selection of fuses should be fair. It is strictly prohibited to use copper, aluminum, or iron wires as substitutes to prevent fires.
5. Household appliances such as refrigerators, freezers, washing machines, etc. A socket with a grounding wire that meets the requirements for product use should be equipped.
6. Check or replace the lamp head. Even if the switch is turned off, do not touch it directly with your hands to avoid electric shock.
7. When a fire occurs inside an electrical appliance, the power supply should be blocked first, and direct use of water is strictly prohibited to prevent electric shock.
8. When getting an electric shock, the power should be disconnected first (such as from a height and measures should be taken to prevent falling due to electric shock), and then first aid should be given.
9. When moving the complete set ofvariable frequency series resonance test equipment, the gate must be pulled out first to cut off the power supply, and then the equipment must be moved without any movement. After moving electrical equipment with metal casings such as electric motors to a new location, the grounding wire should be installed first, and the complete set of frequency conversion series resonance test equipment should be checked to confirm that the equipment is problem free before use.
