Mumbai-based Crompton Greaves manufactures D C motors that are custom-built motors of optimum design with wide range of ratings to select from, for any application/requirement of industry. Lightweight and lower GD sq value enable swift mechanical response to meet frequent reversal. These motors are available in standards IEC34-1, DIN VDE 0530, BS 5000 PART 99 and IS 4722. The DC motors can be selected to meet the requirement of NEMA standard MG1. The shaft centre height and mounting dimensions are generally in line with IEC 72. Facilities to which these motors are useful are design centre equipped with state of art CAD & mechanical automation software facilities; stator fabrication shop; CNC cylindrical grinding machine; 5-tonne dynamic balancing machine; dust-free coil winding shop; rotor assembly shop; final assembly shop; VPI plant and testing facilities. Salient features * Class F insulation with vacuum pressure impregnation for armature winding ensuring high insulation strength. Frames 100 to 280 are offered with class “H” insulation * Fully laminated magnetic circuit construction offering excellent commutation suitable for 6-pulse thyristor power supply * High over load capacity, low field power and high overall efficiency * Frames 315 to 630 are fully compensated to withstand high short time overloads under field weakening condition * Sturdy mechanical construction * Compact, low weight and highly energy efficient * Large size of bearing for longer life and trouble-free operations * Special commutator design with fibre-glass taper rings, light weight and low GD sq construction * Constant force brush holders with longer brushes for excellent brush contact, better commutation and longer brush life * Modular design for flexibility of terminal box and F C unit position * Minimised vibrations, noise and longer bearings life through minimized unbalance at every stage and precision balancing of rotors using state of art dynamic balancing machine to grade better than 1.5 * Minimised noise level and torque pulsations through unique parallel skewed armature slot construction * Electrical brazing of armature conductor to commutator riser connection for 315-630 frames and high temperature soldering for 100-280 frames for best mechanical and electrical joints Applications * Steel industry: re-rolling drives, table rollers, pinch rollers, coilers and uncoilers, screw down and shear drives * Paper industry: wire section, press section, dryers, and dandy rolls * Sugar industry: sugar mill drives, centrifuge, crushers, ID/FD fan * Cement industry: cement mill, kiln drive, apron feeders, raw mill, fan drives, and grate cooler * Rubber industry: rubber extruders, Banburry rolls * Textile industry * Printing machines * Plastic extruders * Machine tools * Cable industry * Material handling
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