Can any body has idea to design low cost Harmonic filter to be connected at the input of drive and  sinus filter for drive pwm o/p? Need the factors to consider while designing.

What is the requirement, IEEE-519?

It depends on the specific converter topology in the drive you are currently using. For common 6-pulse diode front-end rectifier, a 3-phase line reactor (e.g, 3% per unit) is the most simple approach to meet the harmonic restriction posed by IEEE std 519-1992. For the drive output filter, you could design a passive LC filter, but you need to consider the switching frequency f_sw, fundamental frequency f_0, as well as the losses across the filter. As a rule of thumb, for a sinewave filter, the LC parameters should meet: f0<1/[2*pi*sqrt(LC)]<f_sw, as as to avoid resonance with the ac drive and load. The specific LC value can be determined by minimizing losses when tune the LC filter.

What is the requirement of IEE -519? On what basis calculation is done that 3% line reactor is sufficient to meet IEE -519? As per IEC -519 what should be the Voltage harmonic and what should be the current harmonic?

Thanks

Great answer Jiangbiao!

As far as cost it is cheaper to tune out higher frequencies because there are fewer turns of copper wire. If you can increase your carrier frequency you can save money on the filter. There is a point where a higher carrier frequency causes a de-rating. Larger motors like a lower carrier frequency. The de-ratings should be in the inverter manual.