SHEPWM

[JC_MI]

Hi.

  How can i implement an angle control switching for  4 Mosfet in labview ? (shepwm). I tried to read the angle from a sin wave form  like a reference (60hz,amp= 5 volts, offset =0), then when the sin is 1.45 or  55 or  80 or 235 or 360 grad it sent a pulse to Mosfet via DAC, but I cant read the angle position from sin  wave form.

[mikeporter]

I don't know what you mean by a sine wave form. Could you post the code you have tried and explain what it is that you want?

Mike...

[JC_MI]

I know the angles , but I don't know how to do that. (image)

[JC_MI]

[GerdW]

Hi JC,

judging from your image I would try to compare the sine wave to some threshold values to switch the MOSFETs…

[JC_MI]

I did it , but is dificult because is not possible to read the position angle from the senusoidal signal to compare directly with angle, other option  was calculate the amplitud in each interval but is not very exact, in similar projects a PIC is used for  do that.