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V012024 • © 2024 Portescap. Specifications subject to change without notice.Dimensions in mmBrushless DC Slotless Motors55°120°55°twisted & tinned8 x Flat cable (ribbon)Insulation: PVC, AWG 24, 300V,105°CØ11.5±0.16x M23.1 min. depth6x60°Ø134±1Ø16+0.05-0.10 300+20 0 52±0.1Ø3-0.006-0.009 Ø10 0-0.02 A10±0.21 0-0.116±50.1 A16ECS52 Ultra EC™Electrical Data Symbol 16ECS52-8B-xxx.01 Unit 49 30 211 Nominal Voltage UN 24 24 24 Volt2 Optimization Direction - Symmetrical Symmetrical Symmetrical -3 No Load Speed n0 27,800 45,400 66,380 rpm4 Typical No Load Current I0 85 135 240 mA5 Max Continuous Mechanical Power (@25°C) Pmax 66 66 66 W6 Max Continuous Current Ie max 2 3.2 4.6 A7 Max Continuous Torque Me max 16.1 (2.28) 15.9 (2.25) 15.8 (2.23) mNm (oz-in)8 Back EMF Constant kE 0.84 0.52 0.36 V/1000 rpm9 Torque Constant kM 7.99 4.93 3.45 mNm/A10 Motor Regulation R/k2 15.35 15.6 15.9 103/Nms11 Motor Regulation k/R½ 8.1 (1.15) 8 (1.13) 7.9 (1.11) mNm/W½ (oz-in/W½)12 Internal Resistance - phase to phase RI 0.98 0.38 0.19 ohms13 Line to Line Resistance at Connectors RL 1.06 0.43 0.24 ohms14 Inductance Phase to Phase L 0.12 0.02 0.01 mH15 Mechanical Time Constant τm 1.5 1.6 1.6 ms16 Electrical Time Constant τe 0.12 0.06 0.05 msGeneral Data17 Maximum Motor Speed nmax 73,000 rpm18 Ambient Working Temperature Range - -30 to +100 (-22 to +212) °C (°F)19 Ambient Storage Temperature Range - -40 to +100 (-40 to +212) °C (°F)20 Ball Bearings Preload - 5.3 N21 Axial Static Force w/o Shaft Support (max) - 34 N22 Maximum Winding Temperature - 125 (257) °C (°F)23 Thermal Resistance Rth 3 / 15 °C/W24 Thermal Time Constant τw 750 s25 Weight - 62 (2.19) g (oz)26 Rotor Inertia J 1 g-cm227 Hall Sensor Electrical Phasing* - 120 Electrical °Wire DescriptionGray Phase 1Violet Phase 2Blue Phase 3Green 3 to 24V DCYellow GNDOrange Sensor 1Red Sensor 2Brown Sensor 3with hall effect sensorTorque [oz-in]Speed (rpm)Torque [mNm]Max. continuous operation at 25°CContinuousShort time30W45W60W75W0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25010,00020,00030,00040,00050,00060,00070,0000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1715W214930010,00020,00030,00040,00050,00060,00070,0000 6 12 18 24No load speed (rpm)Power supply voltage (V)No load speed for each coilØ 16 mm • 2-pole • 68 W *Also available without Hall sensors26