層間短絡試験機 7750シリーズ
7750-10S/5S/5H/5E/1S

When layer short happened, the loss of power on coil increase, the resonance damping coefficient increase, resonance amplitude decrease, the total area decrease. These are the basic parameters we check layer short.

By calculating and comparing the deference of area between golden sample and DUT.

Show by percentage
Analysis the power loss by this data.

Add up the difference between normal wave and DUT wave call “ Area differential”.

When layer short happened, the inductance reduce(similar the transformer). The wave phase change and the area differential also change. This will show “fail” on the instrument.

However, the parameter might cause deviation because of the deviation of inductance, resonance phase shift. (Silicon steel product such as motor and traditional transformer is not suitable)

By calculating and comparing the deference of area between golden sample and DUT. To determine the degree of waveform overlap.
Compare the inductance by this.

In pulse test, the insulation defect will cause discharge and create corona. This function is able to count the times that corona happened base on the degree of deviation.

Detect the discharge phenomenon on the coil.

LAPLACIAN Comparison

Poor insulation quality of the coil results in discharge under high voltage impact, causing rapid changes in the oscillation waveform. By employing the 7750 second-order differentiation algorithm, the maximum discharge capacity is obtained, effectively detecting quality issues related to electrical leakage caused by poor solder joints in the monolithic inductor.

COMP Comparison

By setting an allowable waveform range for the standard wave, this feature can simultaneously determine the
amplitude and phase of the resonant wave. It enhances the detection capability of inter-turn short circuits.

FLUT Comparison

When there is inter-turn discharge in the winding coil, the waveform will exhibit tremors or fluctuations. Therefore, the instrument quantifies the degree of waveform tremors into numerical values for comparison.

USB Host/Device、RS-232、Remote、LAN

GPIB (Option)