Mechanical engineer here - I'm designing a power-cycling test setup to assess the physical degradation of power modules. General schematic of test setup: https://ibb.co/b2VwVa
The module is a 1200V 450A half bridge inverter.
The power supply will be a supplying approximately 10V, 200A and I chose a resistive load bank such that approximately 1kW will be dissipated through the module and 1kW will be dissipated in the load bank as heat. For reference the load bank will consist of four 0.0984ohm power resistors in parallel yielding an equivalent resistance of apprx 0.025ohm
While not specifically determined yet, the gates will be switching anywhere between 0.033 - 1000 Hz. The main goal of this test is to induce physical degradation via continuous thermal expansion/contraction of the semiconductors, attach materials, and wirebonds. Most likely I'll be conducting two different tests, one using low frequency and the other using a higher frequency.
My question is how to spec out the capacitors according to the schematic. I'm assuming this will be frequency dependent and am assuming that they may not needed for very low frequency switching.
Any input would be greatly appreciated. Thanks!
The module is a 1200V 450A half bridge inverter.
The power supply will be a supplying approximately 10V, 200A and I chose a resistive load bank such that approximately 1kW will be dissipated through the module and 1kW will be dissipated in the load bank as heat. For reference the load bank will consist of four 0.0984ohm power resistors in parallel yielding an equivalent resistance of apprx 0.025ohm
While not specifically determined yet, the gates will be switching anywhere between 0.033 - 1000 Hz. The main goal of this test is to induce physical degradation via continuous thermal expansion/contraction of the semiconductors, attach materials, and wirebonds. Most likely I'll be conducting two different tests, one using low frequency and the other using a higher frequency.
My question is how to spec out the capacitors according to the schematic. I'm assuming this will be frequency dependent and am assuming that they may not needed for very low frequency switching.
Any input would be greatly appreciated. Thanks!
