EC-max 40 ∅40 mm, brushless, 120 Watt

maxonEC
maxon motor
EC-max
M 1:2
Stock program Article Numbers
Standard program
Special program (on request)

283870 283871 283872 283873

Motor Data
Values at nominal voltage
1 Nominal voltage V 48 48 48 48
2 No load speed rpm 10100 7240 4720 3610
3 No load current mA 310 188 104 72.8
4 Nominal speed rpm 9260 6290 3770 2670
5 Nominal torque (max. continuous torque) mNm 168 184 203 211
6 Nominal current (max. continuous current) A 4.02 3.09 2.19 1.74
7 Stall torque mNm 2090 1490 1050 838
8 Starting current A 46.7 23.7 10.9 6.68
9 Max. efficiency % 85 83 82 80
Characteristics
10 Terminal resistance phase to phase W 1.03 2.02 4.4 7.19
11 Terminal inductance phase to phase mH 0.204 0.4 0.937 1.6
12 Torque constant mNm/A 44.8 62.8 96.1 126
13 Speed constant rpm/V 213 152 99.4 76.1
14 Speed/torque gradient rpm/mNm 4.89 4.9 4.55 4.35
15 Mechanical time constant ms 5.17 5.19 4.81 4.61
16 Rotor inertia gcm2 101 101 101 101

Specifications Operating Range Comments

Thermal data n [rpm] Continuous operation
17 Thermal resistance housing-ambient 3.45 K/W In observation of above listed thermal resistance
18 Thermal resistance winding-housing 0.29 K/W 120 (lines 17 and 18) the maximum permissible winding
19 Thermal time constant winding 3.96 s 12000 temperature will be reached during continuous
20 Thermal time constant motor 1240 s 283871
operation at 25°C ambient.
21 Ambient temperature -40…+100°C = Thermal limit.
22 Max. permissible winding temperature +155°C 8000
Mechanical data (preloaded ball bearings) Short term operation
23 Max. permissible speed 12000 rpm 4000 The motor may be briefly overloaded (recurring).
24 Axial play at axial load < 12.0 N 0 mm
> 12.0 N 0.14 mm
25 Radial play  preloaded Assigned power rating
26 Max. axial load (dynamic) 9N 50 100 150 200
27 Max. force for press fits (static) 211 N 1.0 2.0 3.0 4.0
(static, shaft supported)  4000 N
28 Max. radial loading, 5 mm from flange 80 N
Other specifications
29 Number of pole pairs 1
maxon Modular System  Overview on page 16 - 21
30 Number of phases 3 Planetary Gearhead Encoder MR
31 Weight of motor 720 g ∅52 mm 256 - 1024 CPT,
Values listed in the table are nominal. 4 - 30 Nm 3 channels
Page 246 Page 273
Connection motor (Cable AWG 20) Encoder HEDL 5540
red Motor winding 1 Pin 1 500 CPT,
black Motor winding 2 Pin 2 3 channels
white Motor winding 3 Pin 3 Page 279
N.C. Pin 4
Brake AB 28
Connector Article number
24 VDC
Molex 39-01-2040
Recommended Electronics: 0.4 Nm
Connection Sensors (Cable AWG 26)
ESCON 50/5 Page 292 Page 329
yellow Hall sensor 1 Pin 1
brown Hall sensor 2 Pin 2 DECS 50/5 297
grey Hall sensor 3 Pin 3 DEC Module 50/5 299
blue GND Pin 4 DEC 70/10 305
green VHall 3…24 VDC Pin 5 DES 50/5, 70/10 306
N.C. Pin 6 EPOS2 24/5 313
Connector Article number EPOS2 50/5, 70/10 313
Molex 430-25-0600 EPOS2 P 24/5 316
Wiring diagram for Hall sensors see p. 27 EPOS3 70/10 EtherCAT 319
Notes 20
May 2012 edition / subject to change maxon EC motor 171

1206_EC_motor.indd 171 08.05.2012 13:26:05