Brush­less DC pan­cake mo­tors with en­coder

DEMM Engineering & Manufacturing - - ELECTRICAL TECHNOLOGY - www.max­on­mo­

The range of brush­less f lat mo­tors from Maxon Mo­tor has been widely adopted be­cause of their pan­cake form fac­tor and torque rat­ings. Adding an en­coder in the past has in­creased the over­all length of the unit re­duc­ing this ad­van­tage.

The in­te­grated mile en­coder has cre­ated a so­lu­tion that main­tains the mo­tors low pro­file and in­cludes high­res­o­lu­tion en­coder feed­back.

The en­coder op­er­ates by mea­sur­ing the fields gen­er­ated by eddy cur­rents in a tar­get disc. This of­fers im­prove­ments over tra­di­tional en­coder tech­nol­ogy in the form of en­vi­ron­men­tal ro­bust­ness, im­proved speed ca­pa­bil­i­ties and an in­crease tol­er­ance against ex­ter­nal in­ter­fer­ence.

Com­bine all the fac­tors and you have a prod­uct suit­able for driv­ing loads di­rectly with high de­grees of speed and po­si­tion con­trol in robotics and fac­tory au­to­ma­tion ap­pli­ca­tions.

There are three power lev­els 30w 50W and 70W in a 45mm di­am­e­ter and also a high torque 90W ver­sion that is 90mm di­am­e­ter.

The 45mm di­am­e­ter ver­sion is avail­able with both PCB mounted con­nec­tors or a smaller foot­print ca­ble ver­sion. The new in­te­grated en­coder when used with a match­ing mo­tor po­si­tion con­trol unit will con­trol the unit to res­o­lu­tions of up to 25,600qc per rev­o­lu­tion.

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