Common-Mode Voltage of an Electric Coaxial UAV Drive System and Its Suppression
The study aims at electromagnetic compatibility of high-power electric propulsion UAV.With a coaxial dual-rotor UAV's electric propulsion as the research object,the paper analyzes the common-mode voltage in the permanent magnet synchronous motor under different vector synthesis strategies.A comparison is made between the non-zero vector strategies(AZSPWM,NSPWM,and GAZSPWM)in their effectiveness and limitations.A method is proposed that combines the non-zero vector modulation strategy with an active LC filter at the output of the inverter.This method can effectively suppress electromagnetic interference in the UAV power system with no additional shielding weight.Simulation and tests are conducted to compare the suppression effect of the three non-zero vector modulation strategies on the common-mode voltage under the passive filter.The results indicate that GAZSPWM combined with an LC filter can better suppress the common-mode voltage without affecting existing control performance.This method will provide a theoretical reference for the research on high-power electric propulsion UAVs which require high electromagnetic compatibility.
万方数据
维普
