Hi everybody,

am working on a PMSM running, and I´ve noticed something like...

When i run the motor without load, there are huge current spikes/ripple in the waveform, but as i load the motor the spikes starts decreasing and it runs good, so can anyone suggets me how to get the good sine wave while running without load.
the inductance of the machine is 1.6mh.

Thanks.

 

Welcome to the forums.

Posting into a stale thread - http://forum.allaboutcircuits.com/showthread.php?t=21455 is not going to get much of a response, a the principals have gone on.

We can't make more than guesses without a complete schematic and operating details.