Five-phase inverter non-sinusoidal random SVPWM modulation method
A technology of five-phase inverter and modulation method, applied in the direction of AC motor control, control system, conversion of AC power input to DC power output, etc., can solve the problems of high-frequency performance improvement, and achieve suppression of electromagnetic interference and high-frequency noise , Suppress electromagnetic interference, reduce the effect of the amplitude
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[0032] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0033] The topology of the five-phase voltage source inverter bridge is as follows: figure 1 shown. The DC bus voltage is U DC , each bridge arm has two upper and lower power switch tubes, whose turn-on and turn-off are controlled by PWM modulation signals. Define the switch function S=[S a ,S b ,S c ,S d ,S e ], taking phase a as an example, when the upper bridge arm switch is turned on, S a =1, when the lower bridge arm switch is turned on, S a = 0, and the other phases are the same. At the same time, only one switch tube of the upper and lower bridge arms is turned on, then the space voltage vector can be expressed as:
[0034]
[0035] In formula (1), k=0, 1, 2, 3...31 is a decimal number converted from a binary switching function.
[0036] According to the different combinations of the switch states of the bridge arms of each phas...
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