1, Advantages in application
1. Significantly reduced the required power supply capacity. The power supply uses resonant reactors and capacitors to generate high voltage and high current through resonance. In the entire system, the power supply only needs to provide the active power consumption part of the system. Therefore, the required power for testing is only 1/Q of the testing capacity.
2. And it greatly reduces the weight and volume of the series resonance withstand voltage test device The series resonant power supply not only eliminates the need for high-power voltage regulators and commonly used high-power test transformers, but also requires only 1/Q of the test capacity for the resonant excitation power supply, greatly reducing the weight and volume of the system, typically ranging from 1/10 to 1/30 of t. He is an ordinary testing equipment.
3. And the output voltage waveform has been improved. The resonant power supply is a resonant filtering circuit that can improve the waveform distortion of the output voltage, obtain a good sine waveform, and effectively prevent harmonic peaks from causing false breakdown of the sample.
4. To prevent large short-circuit currents from burning out the fault point, in the series resonance state, when the insulation weak point of the sample is damaged, the circuit immediately loses resonance, and the loop current quickly drops to 1/Q of the normal test current. When parallel resonance or test transformers undergo withstand voltage tests, the breakdown current can reach several tens of times, and the short-circuit current differs from the breakdown current by hundreds of times. Therefore, series resonance can effectively detect weak links in insulation, and there is no large short-circuit current burning fault point.
5. There will be no overvoltage recovery. When the sample malfunctions, due to the loss of resonance conditions, the high voltage will immediately disappear, the arc will immediately extinguish, and the reconstruction process of restoring voltage is long. It is easy to disconnect the power supply before reaching the flashover voltage again. This voltage recovery process is an intermittent oscillation process of energy accumulation, which takes a long time and does not occur. Any restoration of overvoltage now.
2, Technical features:
1. The series resonant withstand voltage test device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashover). The overvoltage and overcurrent protection values can be adjusted according to the user's needs. It is possible to record the flashover protection effect of the test product and record the flashover voltage value for experimental analysis.
2. There are three working modes of the series resonance withstand voltage test device. Facilitating users to flexibly choose based on on-site conditions and improving testing speed; The working modes include: fully automatic mode, manual mode, and automatic tuning manual boost mode.
3. Data can be stored and printed in different locations, and the stored data numbers are digital for easy identification and retrieval by users.
4. When the series resonance withstand voltage test device automatically scans the frequency, the frequency starting point can be set arbitrarily within the specified range, and the scanning direction can be selected up and down. At the same time, the scanning curve can be displayed on a large LCD screen, allowing users to directly understand whether the resonance point has been found.
5. Adopting DSP platform technology. According to user requirements, the functionality and upgrades have been conveniently reduced, making the human-machine interface more user-friendly.