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EC121A 121mm Brushless DC Motor

The EC121A series brushless motor is a high torque model brushless motor designed in a NEMA 56 package. It is offered in 4 motor lengths with continuous torque from 3.0 - 6.5 Nm.

Features:
  • Speeds up to 4,000 RPM
  • DC bus voltage up to 325 Vdc
  • NEMA 56 package
  • Capable of 48V Vdc bus systems
  • 8 Pole neodymium design
  • Specifications +

    MOTOR DATAUnitsEC121A-1EC121A-2EC121A-3EC121A-4
    Max DC Terminal Voltage V 325325325325
    Max Speed (Mechanical)rpm4000400040004000
    Continuous Stall TorqueNm3.03.94.56.6
    Continuous Stall Torqueoz-in430550630930
    Peak Torque (Maximum)Nm9.4121420
    Peak Torque (Maximum)oz-in1300170020002800
    Rotor Inertiakg m20.000790.00120.00170.0021
    Rotor Inertiaoz-in-s20.110.180.240.30
    Motor Weightg710099001200015000
    Motor Weightoz250350440530
  • Dimensional Drawings +


  • Performance Curves +


    EC121A-1 Speed Torque Performance Curve

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


    EC121A-2 Speed Torque Performance Curve

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


    EC121A-3 Speed Torque Performance Curve

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


    EC121A-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 +

    Page-0cd3f1b2-c187-46d7-91d0-36db138afad5
    EC121A-1Units
    Rated VoltageV60.076.076.0121152152305
    Rated TorqueNm2.22.32.42.32.32.32.3
    Rated Torqueoz-in320320330330330330320
    Rated Speedrpm4000400040004000400040004000
    Rated CurrentA2825211814118.5
    Rated PowerW930950990960970960960
    No Load Speedrpm4000400040004000400040004000
    No Load Current A1.21.00.820.700.570.450.34
    Torque Constant Nm/A0.09360.1050.1290.1520.1870.2340.315
    Torque Constant oz-in/A13.314.918.321.526.533.144.6
    Voltage ConstantV/krpm9.8011.013.515.919.624.533.0
    Terminal ResistanceΩ0.05000.07000.1000.1400.2200.3400.610
    Inductance mH0.270.340.510.721.091.703.10
    Peak Current A110998469574533
    Page-536a93f9-2c01-41f6-bc9b-f3dbe296ecee
    EC121A-2Units
    Rated VoltageV76.076.0152152305305
    Rated TorqueNm2.12.32.32.32.32.4
    Rated Torqueoz-in300320330330320330
    Rated Speedrpm400040004000400040004000
    Rated CurrentA191814117.35.3
    Rated PowerW880950980970960990
    No Load Speedrpm400040004000400040004000
    No Load Current A1.21.10.730.620.410.29
    Torque Constant Nm/A0.1310.1500.2060.2440.3740.524
    Torque Constant oz-in/A18.621.229.234.553.074.2
    Voltage ConstantV/krpm13.715.721.625.539.254.9
    Terminal ResistanceΩ0.07000.08000.1500.2100.5100.950
    Inductance mH0.320.420.801.132.675.24
    Peak Current A969066573626
    Page-5256133a-cb0e-431f-af09-2a03dc19ea63
    EC121A-3Units
    Rated VoltageV76.0152152305305305
    Rated TorqueNm2.42.72.72.62.62.7
    Rated Torqueoz-in340380390370380390
    Rated Speedrpm400040004000400040004000
    Rated CurrentA1615119.47.65.6
    Rated PowerW100011001100110011001100
    No Load Speedrpm400040004000400040004000
    No Load Current A0.790.690.510.440.350.25
    Torque Constant Nm/A0.1810.2070.2850.3300.4130.573
    Torque Constant oz-in/A25.629.340.346.858.681.1
    Voltage ConstantV/krpm19.021.729.834.643.360.0
    Terminal ResistanceΩ0.09000.1100.2000.2800.4300.790
    Inductance mH0.460.601.141.132.424.58
    Peak Current A817557483928
    Page-88816ec9-5cae-4220-9175-2a90a41244d4
    EC121A-4Units
    Rated VoltageV152305305
    Rated TorqueNm4.74.74.7
    Rated Torqueoz-in660660660
    Rated Speedrpm400040004000
    Rated CurrentA241512
    Rated PowerW200020002000
    No Load Speedrpm400040004000
    No Load Current A1.10.650.53
    Torque Constant Nm/A0.2240.3650.449
    Torque Constant oz-in/A31.851.763.6
    Voltage ConstantV/krpm23.538.247.0
    Terminal ResistanceΩ0.1300.3400.520
    Inductance mH0.931.603.72
    Peak Current A1006351
  • Encoders +


    C Encoder
    The C & D high performance incremental encoders are transmissive devices with motor commutation outputs, integrated bearing and isolating spring mount. These encoders are identical to the Q and V encoders except for the additional motor commutation signals.

    Features:
    • U V W motor phase commutation signals
    • 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 C1, C3, C5, C8
    Available Resolutions - - 1000, 2000, 2500, 5000
    Output - - 2-Channel Quadrature with Index
    Output Interface - - TTL Compatible
    Differential Line Driver Yes
    Commutation Poles 4 pole
    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
     
    ENCODER DATA SYMBOL UNITS CA, CC, CE, CH
    Available Resolutions - - 1000, 2000, 2500, 5000
    Output - - 2-Channel Quadrature with Index
    Output Interface - - TTL Compatible
    Differential Line Driver Yes
    Commutation Poles 8 pole
    Supply Voltage Vcc VDC 4.75 to 5.25
    Supply Current Icc mA 200 max
    Max. Operating Frequency fmax kHz 500
    Operating Temperature θmax °C -20 to +100

    Dimensional Drawings

    Connection Chart
    COLOR C models
    Red Vcc
    Black Encoder Ground
    Brown Channel A
    White Channel A̅
    Blue Channel B
    Green Channel B̅
    Orange Index I
    Yellow Index I̅
    Violet Output U
    Gray Output U̅
    White / Brown Output V
    White / Red Output V̅
    White / Orange Output W
    White / Yellow Output W̅
    Black / White Case Ground
    Drain Wire Cable Shield

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


    Recommended Drives
    BGE6050