detailed description:

The current problem with conventional hysteresis loop testing equipment for measuring capacitance energy density under high voltage is that the charge on the test sample is discharged back to the high voltage power supply, rather than onto an effective and meaningful load.

The main manifestations of the problem are:
1) The discharge speed of the power supply is very slow (10-100 milliseconds), while in reality, the discharge of the load is generally in microseconds to milliseconds;
2) When discharging the power supply, the voltage to be measured decreases linearly, while when discharging the load, the voltage decreases exponentially;
3) In the process of measuring hysteresis loops, the program controls the actual output voltage of the power supply (assuming that the sample voltage is the same as the power supply voltage), and the sample energy is returned to the high-voltage power supply;
4) When discharging the load, it is like a free fall, and the voltage is completely determined by the sample performance, load (impedance), and wiring. You can choose a load similar to the application (proportionally reduced) to accurately measure an energy density related to the application;
5) In general, the energy density measured by the hysteresis loop is greater than the energy density that the capacitor can release in practical applications, which may mislead users;

Main features:
1) This tester uses a special high-voltage switch to control the charging and discharging processes separately. The discharge switch has a very fast speed, with corresponding speeds in the nanosecond range;
2) Using high-precision high-voltage non inductive resistors as discharge loads, the released energy is collected by an oscilloscope and directly given the discharge energy density through program analysis;
3) Two operating modes:
-Manual control: Users manually control the charge and discharge switch;
-Automatic control: The computer program automatically controls the testing process and saves the test results. Especially suitable
Long term charge and discharge life testing;

Main specifications:
1) Test voltage: 10 kV (determined by the selected high voltage switch);
2) Sample capacitance:< 100 pF to > 100 μF；
3) Maximum discharge current:< 15A (discharge switch model determined);
4) Discharge resistance:< 1Ω to > 1 MΩ；
5) Discharge speed: High voltage MOSFET switch, discharge speed<100 nanoseconds;
6) The accuracy of testing current and voltage is determined by the power supply used, sample size, and discharge resistance;
7) Equipment options: Test temperature can be saved;

New features added:
1) Testing the dielectric breakdown strength of dielectric materials: DC breakdown at constant DC voltage breakdown time (withstand time), AC breakdown strength at constant AC voltage breakdown time (withstand time);
2) Can simultaneously test discharge current (within a certain current range);
3) Built in oscilloscope;
4) Allow the use of specific inductor/resistor combinations to study discharge oscillations;
5) Allow reverse voltage/current;
6) Provide software and hardware to enable users to polarize piezoelectric materials;
7) New testing fixtures;
8) Customized low-voltage charge and discharge test film samples (100V);

Welcome to inquire!