AmetekHaydonKerk AmetekAMS
Skip to content

EC057B 57mm Brushless DC Motor

Brushless DC Motor EC057B
The EC057B series brushless motor is a high torque model brushless motor designed in a NEMA 23 package. It is offered in 4 motor lengths with continuous torque from 0.148 - 0.586 Nm.

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

NEW! Pittman Express Motor Calculator Tutorial

How Motor Curves are Created and How to Use Them
When should a gearbox be used in your DC motor application?

  • Specifications +

    MOTOR DATAUnitsEC057B-1EC057B-2EC057B-3EC057B-4
    Max DC Terminal Voltage V 170170170170
    Max Speed (Mechanical)rpm6000600060006000
    Continuous Stall TorqueNm0.150.320.400.60
    Continuous Stall Torqueoz-in21455784
    Peak Torque (Maximum)Nm0.460.981.31.8
    Peak Torque (Maximum)oz-in65140180260
    Rotor Inertiakg m20.00000710.0000120.0000180.000023
    Rotor Inertiaoz-in-s20.00100.00170.00250.0032
    Motor Weightg54074010001300
    Motor Weightoz19263645
  • Dimensional Drawings +

  • Performance Curves +

    EC057B-1 Speed Torque Performance Curve

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

    EC057B-2 Speed Torque Performance Curve

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

    EC057B-3 Speed Torque Performance Curve

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

    EC057B-4 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 +

    Rated VoltageV30.
    Rated TorqueNm0.
    Rated Torqueoz-in191919191919
    Rated Speedrpm600060006000600060006000
    Rated CurrentA5.
    Rated PowerW838383838484
    No Load Speedrpm600060006000600060006000
    No Load Current A0.340.
    Torque Constant Nm/A0.02670.03340.04300.05280.06580.0840
    Torque Constant oz-in/A3.794.736.097.489.3211.9
    Voltage ConstantV/krpm2.803.504.505.536.898.80
    Terminal ResistanceΩ0.4200.6601.081.652.514.10
    Inductance mH0.691.091.802.684.176.80
    Peak Current A2016129.98.16.3
    Rated VoltageV38.
    Rated TorqueNm0.
    Rated Torqueoz-in393939393939
    Rated Speedrpm600060006000600060006000
    Rated CurrentA8.
    Rated PowerW170170170170170170
    No Load Speedrpm600060006000600060006000
    No Load Current A0.460.390.310.250.200.12
    Torque Constant Nm/A0.03720.04420.05610.06980.08700.143
    Torque Constant oz-in/A5.276.267.959.8912.320.3
    Voltage ConstantV/krpm3.904.635.887.319.1115.0
    Terminal ResistanceΩ0.2800.4000.6401.001.554.08
    Inductance mH0.570.801.
    Peak Current A30252016137.8
    Rated VoltageV3848.
    Rated TorqueNm0.330.340.340.340.340.340.33
    Rated Torqueoz-in47484848494947
    Rated Speedrpm6000600060006000600060006000
    Rated CurrentA118.
    Rated PowerW210210210210220220210
    No Load Speedrpm6000600060006000600060006000
    No Load Current A0.550.460.360.
    Torque Constant Nm/A0.03660.04390.05610.07080.08790.1440.204
    Torque Constant oz-in/A5.186.227.9510.012.520.428.9
    Voltage ConstantV/krpm3.834.605.887.419.2115.121.4
    Terminal ResistanceΩ0.1900.2800.4500.7101.122.886.42
    Inductance mH0.390.570.931.492.306.1712.52
    Peak Current A39332520169.96.6
    Rated VoltageV48.
    Rated TorqueNm0.500.500.500.520.510.52
    Rated Torqueoz-in707071747274
    Rated Speedrpm600060006000577060005840
    Rated CurrentA13108.
    Rated PowerW310310310310320320
    No Load Speedrpm600060006000600060006000
    No Load Current A0.640.500.400.240.190.12
    Torque Constant Nm/A0.04390.05610.07080.1180.1530.235
    Torque Constant oz-in/A6.227.9410.016.821.633.3
    Voltage ConstantV/krpm4.605.877.4112.416.024.6
    Terminal ResistanceΩ0.1700.2700.4401.201.944.63
    Inductance mH0.440.741.203.305.4812.85
    Peak Current A48362918149.0
  • Wiring Diagram +

    Color Signal
    Red Phase R
    White Phase S
    Black Phase T
    Bare Case Ground

    Note: EC057B uses a Z-Series Commutation Encoder. See Encoder section for wire color and signal designations.
  • Encoders +

    Z Encoder 
    The Z Series incremental encoders represents state of the art in ASIC sensor technology. This technology requires fewer components thereby increasing product quality while providing improved precision from a smaller package. Additionally, the precision of the commutation channels is superior to that typically achieved with Hall signals resulting in improved system performance. These units are factory mounted on PITTMAN dc motors and aligned to the motor’s electrical properties which allows “drop-in” replacement capability without the need to “initialize” each new motor. Connections to the encoder are made through the motor’s 16 pin connector referenced below. 

    • Output Channels- Incremental A, B, C, & Commutation U, V, W
    • Differential Line Drivers – all 6 Channels
    • Commutation for 4 & 8 Pole Motors
    • Power Requirement – 200mA @5VDC
    • 500KHz Operating Frequency – All Channels
    • Inertia – 0.00015 oz-in-sec2
    • RoHS Compliant to EU Directive 2002/95/EC
    • Factory Installed Only

    Available Resolutions - - 1000 2000
    Output - - 2-Channel Quadrature with index 2-Channel Quadrature with Index
    Output Interface - - TTL Compatible TTL Compatible
    Differential Line Driver

    Yes Yes
    Commutation Poles

    4 pole 4 pole
    Supply Voltage Vcc VDC 4.75 to 5.25 4.75 to 5.25
    Supply Current Icc mA 200 max 200 max
    Max. Operating Frequency fmax kHz 500 500
    Operating Temperature θmax °C -20 to +100 -20 to +100

    Dimensional Drawings
    Connection Chart
    PIN Color
    Z models
    1 Red Vcc
    2  Brown Channel A
    3  Blue Channel B
    4  Orange Index I
    5  Violet Output U
    6  White/Brown Output V
    7  White/Orange Output W
    8  White/Black Case Ground
    9  Black Common
    10  White Channel A̅
    11  Green Channel B̅
    12  Yellow Index I̅
    13  Grey Output U̅
    14  White/Red Output V̅
    15  White/Yellow Output W̅
    16  Bare Cable Shield

    Recommended Encoder Data Sheets
    Z Encoder Data Sheet pdf 
  • Drives +

    Recommended Drives

    Alternate Drives