AC Drives

Additional Details

We offer an exclusive series of AC Drives. Which refer to variable frequency drives that are used in various applications that require us to run the motor at various speeds depending on the process requirement. Applications could be simple ones like pumps and fans or conveyers. They may be stand alone drives or may need to run in a coordinated style with other drives such as in a wire drawing line. 

The system consists of power electronics that converts the incoming AC to DC and is filtered through capacitors making it practically ripple free. This DC is then converted to variable frequency AC through pwm techniques using igbt switches switching at high frequency ( between 2 to 8khz depending on the rating). 

Standard protection includes i2t, overload, over temperature, short circuit, ground fault, phase imbalance, thermistor protection, high bus voltage, stall prevention, under voltage, over voltage etc. 

These are normally single quadrant drives with a facility for dynamic braking. For more severe braking external braking units and resistors may have to be added. 

Interface with external signals is possible through the i/o ports provided. communicaiton can be incorporated through profibus, modbus etc. 

Features include controlled acceleration and deceleration, skip frequencies, speed limits, pre programmed speeds, powerful diagnostics, pid close loop control etc.