PWM Voltage Rise Time and Pulse Width Control to Minimize Partial Discharge Exposure
Paper in proceeding, 2021
introduced and utilized to investigate what influence the pulse width and rise time has on the partial discharge (PD) characteristics in the test object. Specifically, it is demonstrated that the presence of PDs can be reduced by adjusting the rise times at some of the voltage flanks only. Further the influence of pulse width and peak amplitude on these filtered flanks are explored. This to enable the use of higher carrier frequency and to reduce the inverter level otherwise required. It is confirmed that when applying a sufficiently wide pulse with increased rise time at the critical voltage flanks only, the PD exposure drops considerably. The demonstrated approach presents a promising principle to reduce the stress appearing in motor windings when applying ultra-short rise times.
Pulse width modulation
Twisted pair cables
Chalmers, Electrical Engineering, Electric Power Engineering
Proceedings ICEMS 2021
Gyeongju, South Korea,
Mechanisms of partial discharges in polymeric HVDC power cables
Chalmers, 2018-08-01 -- .
Areas of Advance
Other Electrical Engineering, Electronic Engineering, Information Engineering
Chalmers Materials Analysis Laboratory