Thefrequency conversion series resonance test deviceintegrates voltage regulation, frequency regulation, control, and protection functions
Thevariable frequency series resonance test devicemainly consists of a variable frequency controller, excitation transformer (air pressure variable), high-voltage reactor, high-voltage voltage divider, etc. Variable frequency controllers are mainly divided into two categories: desktop controllers with 20KW and above, and portable box controllers with 20KW and below; Composed of a controller and a filter (filter) The main function of the series resonant frequency of the variable frequency controller of the testing device is to convert a fixed frequency AC current with amplitude and frequency (frequency) of 380V or 200V into a sine wave with adjustable amplitude and frequency. And provide power supply for the entire frequency conversion series resonance test device. The function of the excitation transformer is to raise the output voltage of the variable frequency power supply system to a suitable test working voltage. Reactor L is an important component of the resonant circuit, and when the power frequency is equal to 1/(2 π√ LCX), it undergoes series resonance with the test CX.
1. Small volume and light weight, suitable for on-site use
The frequency conversion series resonance test device integrates voltage regulation, frequency modulation, control, and protection functions, eliminating the need for bulky voltage regulators. Moreover, the frequency conversion series resonance test device is easy to operate and has intuitive readings. Due to the high system Q value (30-120) of the Chinese variable frequency series resonance test and detection device, it effectively solves the constraint of insufficient working power capacity on on-site testing. When the voltage level is high, the reactor adopts a multi-stage or stacked structure, which is convenient for transmission and on-site installation .
2. High installation reliability
The frequency conversion series resonance test device adopts advanced design concepts, high-quality IGBT and drive circuits to reduce output waveform distortion and ensure stable frequency output. The frequency conversion series resonance test device has good IGBT, overcurrent, overvoltage (protection value can be manually adjusted according to needs) and discharge protection functions, which can protect the safety of equipment and personnel; When the test sample discharges or breaks down, due to the destruction of resonance conditions, the short-circuit (current not passing through electrical appliances, directly connected to the two poles of the power supply) current is small, only 1/Q of the test current of the test sample. The variable frequency series resonance test device avoids damage to the test sample caused by breakdown.
3. Good equivalence of the experiment
The frequency conversion series resonance test device uses an AC voltage close to the power frequency (30HZ-300HZ) as the test power supply, which is very similar to the 50HZ/60HA power supply in terms of equivalence and consistency. The frequency conversion series resonance test device ensures the reliability and authenticity of the test results.
