The secret of series resonant boost

In the series resonance test, we often encounter that the voltage cannot be boosted to the test voltage. What are the reasons that cause the series resonance device to not boost the test voltage? Today we will analyze and solve this problem together.

Phenomenon:

1) The tuning curve is a straight line with lower spikes;

2)During the test, the primary voltage is high, but the high voltage is low. Even when the test voltage is not raised, the primary voltage has reached the rated voltage, and the circuit will automatically step down;

The reason:

1) The reactor does not match the capacitance of the test product, and the resonance point is not accurately found;

2) The sample loss is high, and the system Q value is too low;

3) The high-voltage output voltage of the excitation transformer is low;

3)The high-voltage connection line is too long or no high-voltage halo line is used.

Elimination method:

1) Connect the compensation capacitor to the test circuit to increase the circuit capacity;

2) Connect as many reactors as possible to increase the loop inductance;

3) Increase the output voltage of the excitation transformer;

4) Dry the test object, improve the insulation strength of the test object, and reduce the active power loss of the circuit;

5) Generally, when the equipment has a high voltage output, a high-voltage halo wire is used, or the ordinary high-voltage output wire is changed to a shorter wire, which generally does not exceed 5 meters.

If the problem still cannot be solved after all processing, please contact the manufacturer. Do not disassemble the instrument!