How to build variable frequency drive (VFD) with MPPT facility for solar pump

[Nitin Arun Kallole]

Hi,

I have a solar pump with 3hp capacity, with 8Ampere current rating . To control the pump i need to design a variable frequency drive(VFD) with Maximum Power Point Tracking (MPPT) facility.

VFD is a type of adjustable-speed drive used in electro-mechanical drive systems to control motor speed and torque by varying motor input frequency and voltage.

VFD is a power conversion device. The VFD converts a basic fixed-frequency, fixed-voltage sine-wave power(line power) to a variable frequency, variable-voltage output used to control speed of motors.

Please help me.

Thanks & Regards,

Nitin Arun Kallole
Sangli-416416
Maharashtra

 

[MikeMl]

Sounds like a job for a processor, quite a powerful one...

Parameters directly controlled by the processor are VFD output voltage and output frequency.
Dependent parameters to be measured by the processor are Solar panel voltage and current.

 

[shortbus=]

May be misunderstanding this question, but you say "solar" and "VFD". Since a variable frequency drive (VFD) is an AC device, what are you converting the DC from the solar panel into AC with? And you mention no voltage values that your using.

 

[MikeMl]

To me, a VFD is a fancy switch-mode power supply which can synthesize a sine wave with frequency variable from a few Hz up to ~double or triple line frequency. It happens to rectify the AC line to make DC, but that is incidental to its operation. The DC could just as easily come from a solar panel or a battery.