One: The power capacity required for the test is greatly reduced. Because the power supply of the series resonance withstand voltage test device uses the resonance of the resonant reactor and the capacitance of the tested product to generate high voltage and large current, in the test system, the power supply only needs to provide the part of the active power consumption in the test system, so , The power capacity required for the test is greatly reduced.
Two: The weight and volume of the entire test device are reduced a lot. The power supply capacity of the device is reduced, so that neither a large and medium-sized high-power voltage regulator nor an ordinary high-power power frequency test transformer is needed, so the volume and weight of the entire device are greatly reduced.
Three: The waveform of the output voltage of the device is improved. Because of this device, the resonant power supply is a resonant filter circuit, which not only improves the waveform distortion of the output voltage and can obtain a good sinusoidal waveform, but also plays a great role in preventing the false breakdown of the test product by the harmonic peak. effect.
Four: The large short-circuit current burns the fault point to be prevented. When the test device is in series resonance state, when the insulation weakness of the test product is broken down, the circuit will be detuned immediately, and the loop current will quickly drop to 1/Q of the normal test current. However, if you use parallel resonance or test transformer to do withstand voltage test, the breakdown current will immediately increase dozens of times. The two different test methods let us see that the test short-circuit current and the breakdown current are hundreds of times different. Therefore, the series resonance can effectively find the insulation weakness, and there is no worry of large short-circuit current burning the fault point.
Five: The test device will not show any form of recovery overvoltage. When a breakdown occurs in the test, the high voltage disappears immediately due to the loss of resonance conditions, the arc is extinguished immediately, and the restoration of the voltage is very long. The test is very easy to disconnect the power before the flashover voltage is reached again. The recovery process, there is an intermittent oscillation process of energy accumulation, this process is very long, and there will be no recovery overvoltage. So the whole test is effective and safe!
