maxon

EC 25 25 mm, brushless, 250 WattHigh Speedmaxon EC motorM 3:2Stock programStandard programSpecial program (on request)Article NumbersMotor Data (provisional)Values at nominal voltage1 Nominal voltage V2 No load speed rpm3 No load current mA4 Nominal speed rpm5 Nominal torque (max. continuous torque) mNm6 Nominal current (max. continuous current) A7 Stall torque mNm8 Starting current A9 Max. efficiency %Characteristics10 Terminal resistance phase to phase 11 Terminal inductance phase to phase mH12 Torque constant mNm/A13 Speed constant rpm/V14 Speed/torque gradient rpm/mNm15 Mechanical time constant ms16 Rotor inertia gcm 235114436641002426230032.86.311580294940.1220.01375.36178040.62.325.45Specifications Operating Range CommentsThermal data17 Thermal resistance housing-ambient 6.54 K/W18 Thermal resistance winding-housing 0.1 K/W19 Thermal time constant winding 0.509 s20 Thermal time constant motor 332 s21 Ambient temperature -20…+100°C22 Max. permissible winding temperature +125°CMechanical data (preloaded ball bearings)23 Max. permissible speed 70000 rpm24 Axial play at axial load < 8 N 0 mm> 8 N max. 0.14 mm25 Radial play 0.025 mm26 Max. axial load (dynamic) 7 N27 Max. force for press fits (static) 120 N(static, shaft supported)5650 N28 Max. radial loading, 5 mm from flange 20 NOther specifications29 Number of pole pairs 130 Number of phases 331 Weight of motor 207 gValues listed in the table are nominal.n [rpm]70000600005000040000300002000010000125010 20 30 40 503 5 7 9 11351144Continuous operationIn observation of above listed thermal resistance(lines 17 and 18) the maximum permissible windingtemperature will be reached during continuousoperation at 25°C ambient.= Thermal limit.Short term operationThe motor may be briefly overloaded (recurring).Assigned power ratingmaxon Modular System Overview on page 16 - 21Connection motor (Cable AWG 18)red Motor winding 1black Motor winding 2white Motor winding 3Connection sensors (Cable AWG 26)green V Hall 3…24 VDCblue GNDred/grey Hall sensor 1black/grey Hall sensor 2white/grey Hall sensor 3Recommended Electronics:ESCON 50/5 Page 292DEC 70/10 305Notes 20May 2012 edition / subject to changemaxon EC motor155