I need some clarifications on how and when to switch between voltage vector states (for the sake of discussion lets take V1 and V2 in the image below).
Below is the image of 6 possible voltage vector states for SVPWM drive. To modulate Vref at inverter output, we need to apply V1 state and V2 for specific amounts to times. Equations time T1 and T2 are given below Okay now I know the time, the sector I am in (sector 1 in this case) and angle, Vref magnitude. All is set.
It can be seen that for V1 top 2 switches are on and one bottom switch is on.(lets call them S3,S5,S2 respectively), similarly switches on for all V-states can be interpreted from the image.
Given the following table for switching time for each Switch (S1,S2 and so on):
Q) Lets say Im setting switches on for V1 state (S3,S5,S2), I need to know, do I need to set these switches On simultaneously ?
Q) Relating to question asked before, once all the switches are on, do I also need to turn them off simultaneously ? (By that I mean, adding times for S3,S5,S2 and switch them according to their sum and not by their individual time)
Also please clarify, if we donot need to switch switches on simultaneously then which switch shall be turn on first(For each V-state) ? What will be the precedence ?
Please be explicit when answering my queries, since im coding algorithm for this, I need to know exactly whats going on. Thanks!