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EC057A 57mm Brushless DC Motor

The EC057A series brushless DC motor is a high torque model brushless motor designed in a NEMA 23 package. It is offered in 3 motor lengths with continuous torque from 0.38 - 0.93 Nm.

Features:
  • Speeds up to 6,000 RPM possible
  • DC bus voltage up to 170 Vdc
  • NEMA 23 configuration
  • Six standard windings
  • 4 Pole Rare Earth design
  • Specifications +

    MOTOR DATAUnitsEC057A-1EC057A-2EC057A-3
    Max DC Terminal Voltage V 170170170
    Max Speed (Mechanical)rpm600060006000
    Continuous Stall TorqueNm0.390.710.94
    Continuous Stall Torqueoz-in55100130
    Peak Torque (Maximum)Nm1.22.22.9
    Peak Torque (Maximum)oz-in170310410
    Rotor Inertiakg m20.0000130.0000260.000039
    Rotor Inertiaoz-in-s20.00190.00370.0055
    Motor Weightg66010001400
    Motor Weightoz233648
  • Dimensional Drawings +


  • Performance Curves +


    EC057A-1 Speed Torque Performance Curve

    S.O.A.C. = Safe Operating Area for Continuous duty


    EC057A-2 Speed Torque Performance Curve

    S.O.A.C. = Safe Operating Area for Continuous duty


    EC057A-3 Speed Torque Performance Curve

    S.O.A.C. = Safe Operating Area for Continuous duty


    NOTE: All values specified at 25°C ambient temperature. Peak values are theoretical and for reference only.
  • Winding Performance Data +

    Page-01021c44-bf88-41c2-b367-aa3153d0aae0
    EC057A-1Units
    Rated VoltageV38.048.060.076.076.0152152
    Rated TorqueNm0.320.340.340.330.340.330.34
    Rated Torqueoz-in46484846484648
    Rated Speedrpm6000600060006000600060006000
    Rated CurrentA9.67.45.94.83.72.42.4
    Rated PowerW200210210210210210210
    No Load Speedrpm6000600060006000600060006000
    No Load Current A0.510.380.310.260.190.130.13
    Torque Constant Nm/A0.04010.05350.06680.08020.1070.1600.167
    Torque Constant oz-in/A5.687.579.4711.415.122.723.7
    Voltage ConstantV/krpm4.205.607.008.4011.216.817.5
    Terminal ResistanceΩ0.3100.5200.8201.232.094.915.12
    Inductance mH0.220.400.620.901.603.603.90
    Peak Current A33262017138.48.1
    Page-2017a6d0-3a73-4c14-928f-e1ff73a44ad2
    EC057A-2Units
    Rated VoltageV48.060.076.0121152152170
    Rated TorqueNm0.530.520.540.530.530.530.53
    Rated Torqueoz-in75737775747575
    Rated Speedrpm6000600060006000600060006000
    Rated CurrentA129.36.94.73.63.02.4
    Rated PowerW330330340330330330330
    No Load Speedrpm6000600060006000600060006000
    No Load Current A0.720.580.410.290.230.180.15
    Torque Constant Nm/A0.05350.06680.09360.1340.1740.2140.267
    Torque Constant oz-in/A7.579.4713.318.924.630.337.9
    Voltage ConstantV/krpm5.607.009.8014.018.222.428.0
    Terminal ResistanceΩ0.1900.2900.5401.161.962.964.64
    Inductance mH0.170.260.521.071.802.734.28
    Peak Current A4536271814119.3
    Page-4cd08ffd-006d-4958-8ced-4bcebd8cd16c
    EC057A-3Units
    Rated VoltageV48.060.076.076.0152152
    Rated TorqueNm0.510.500.500.500.510.71
    Rated Torqueoz-in7270717172100
    Rated Speedrpm600060006000600060004570
    Rated CurrentA117.96.45.33.22.7
    Rated PowerW320310310320320340
    No Load Speedrpm600060006000600060004500
    No Load Current A1.20.840.670.560.340.17
    Torque Constant Nm/A0.06020.08020.1000.1200.2010.321
    Torque Constant oz-in/A8.5211.414.217.028.445.4
    Voltage ConstantV/krpm6.308.4010.512.62133.6
    Terminal ResistanceΩ0.1500.2600.4100.5901.563.92
    Inductance mH0.130.240.370.541.503.84
    Peak Current A543933271711
  • Encoders +


    Q Encoder
    The Q & V high performance incremental encoders are transmissive devices with integrated bearing and isolating spring mount. The encoders are identical except for the mounting spring is configured for different motors.

    Features:
    • Resolutions from 1000 to 5000
    • Differential line driver is standard
    • Frequency response to 500 kHz
    • Rugged mechanical design
    • Good for higher temperature
    • Shielded cable

    Specifications
    ENCODER DATA SYMBOL UNITS Q1, Q3, Q5, Q8
    Available Resolutions - - 1000, 2000, 2500, 5000
    Output - - 2-Channel Quadrature with index
    Output Interface - - TTL Compatible
    Supply Voltage Vcc VDC 4.75 to 5.25
    Supply Current Icc mA 125 max
    Max. Operating Frequency fmax kHz 500
    Operating Temperature θmax °C -20 to +100

    Dimensional Drawings

    Connection Chart
    PIN COLOR Q
    1 Red Vcc
    2 Black Encoder Ground
    3 Brown Channel A
    4 White Channel A̅
    5 Blue Channel B
    6 Green Channel B̅
    7 Orange Index I
    8 Yellow Index I̅
    N/C Black / White Case Ground
    N/C Drain Wire Cable Shield

    Recommended Encoder Data Sheets
    Q Encoder Data Sheet pdf

    Alternate Encoder Data Sheets
    H Encoder Data Sheet pdf
  • Gearheads +


    G3000 Gear
    The G3000 is a 57 mm, NEMA 23 planetary gearbox suitable for applications where DC Servo brush or BLDC motor technology is specified. The G3000 is a direct mount to a NEMA 23 motor face using a clamp on pinion.

    Features:
    • Maximum Load torque up to 6.8 Nm
    • All steel gearing for high torque capacity
    • Dual ball bearings on output shaft to withstand high loads
    • 75 lb Radial and Axial Load Capacity
    • Easy “bolt on” to NEMA 23 motors

    Specifications
    GEAR DATA UNITS G3005
    5:1
    G3010
    10:1
    G3015
    15:1
    G3025
    25:1
    G3050
    50:1
    G3100
    100:1
    Maximum Load Nm 6.78 6.78 6.78 6.78 6.78 6.78
    oz-in 960 960 960 960 960 960
    Weight (Mass) g 410 590 820 820 1000 1180
    oz 14.4 20.8 28.8 28.8 35.2 41.6
    Length (LG) mm 75.4 98.3 98.3 98.3 113.0 128.3
    in 2.97 3.87 3.87 3.87 4.45 5.05
    Stages - 1 2 2 2 3 4
    Ratio - 5/1 10/1 15/1 25/1 50/1 100/1
    Efficiency - 0.90 0.80 0.80 0.80 0.70 0.60
    Shaft Rotation - CW CW CW CW CW CW

    Dimensional Drawings


    Combined Length
    G3000 Gearmotor
    Motor Length LGM mm
    Stage 1 2 3 4
    EC057A-1 146.5 169.4 184.1 199.4
    EC057A-2 171.9 194.8 209.5 224.8
    EC057A-3 197.3 220.2 234.9 250.2

    Recommended Gearbox Data Sheets
    G3000 Gearbox Data Sheet pdf
  • Brakes +


    B3 Brake
    The B3 power off, fail safe holding brake is a 57mm NEMA23 version designed to mount directly on the front of Pittman NEMA23 motors without adapter. Like the B49A it is designed to hold a load in position when power is removed from the motor and brake.

    Features:
    • Holding torque of 0.339 Nm
    • NEMA 23 mounting – motor and load
    • 24Vdc
     
    Specifications
    BRAKE DATA UNITS B3
    Applied Voltage Vdc 24
    Holding Torque Nm 0.339
    lb-in 3.0
    Current A 0.18
    Resistance Ohms 132
    Inertia Kg-m2 3.60E-06
    oz-in-sec2 5.1E-04
    Weight Kg 0.5
    Lbs 1.1

    Dimensional Drawings

    DIMENSIONS - inches (mm)
    Model B3
    A (3) 2.250 (57.15)
    B (4x) 0.205 (5.21)
    C (2) 16.75 (425.0)
    H (3) 1.18 (29.97)
    L (1) 1.78 (45.2)
    U (1) 0.250 (6.35)
    U2 (3) 0.145 (3.68)
    AH (3) 0.70 (17.78)
    AJ (3) 2.625 (66.68)
    AK (1) 1.500 (38.1)
    BB (3) 0.10 (2.54)
    Notes:
    All Brake Data is at 20 degrees C
    (1) Maximum Values, (2) Minimum Values, (3) Nominal, (4x) 4 places

    Recommended Brake Data Sheets
    B3 Brake Data Sheet pdf
  • Drives +


    Recommended Drives
    BGE6050

    Alternate Drives
    BGE6010