Motor shaft power, calculation and output

Question:

How can the actual motor power be determined and output?

Answer:

Example of configuration see in appendix:

  • the actual motor torque MCTRL-MACT is reduced by the acceleration proportion (MCTRL-NACT differentiated via DT1) and possibly by the offset proportion (e.g. with hoists)
  • in case of a small speed (n < C0017) the result is saved because of the increasing inaccuracy (S&H)
  • the product resulting from S&H-OUT with the acutal speed MCTRL-NSET2 is almost proportional to the motor shaft power

    • The static motor power is calculated from the following connections:

  • actual power P_act = 2 PI * n_act * M_act
  • torque M_act = 0 ... 100 % * C0057
  • Speed n_act = 0 ... 100 % * C0011
  • P_max = 2 PI * C0057 * C0087 / 60 s
    P_max [kW] = C0057 [Nm] * C0087 [rpm] / 9550

    • The base of FB - configuration is:

  • P-ACT = (MCTRL-MACT + dv/dt - FCODE472/10) * MCTRL-NSET2

    • Typical accuracy of the signal P-ACT:

  • ± 5 % with KTY (temperature sensor)
  • ± 30 % without KTY

    • URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/20010008/1/
    Metadaten
    Taxonomy: 9300 Cam Profiler (EK) servo inverters , 9300 Position Controller (EP) servo inverters , 9300 Register Controller (ER) servo inverters , 9300 Servo PLC Logic (EI) servo inverters , 9300 Servo PLC Technology (ET) servo inverters , 9300 Standard Servo (ES) servo inverters , 9300 servo inverters , 9300 vector EVF93xx-EH hoist frequency inverters , 9300 vector EVF93xx-EV frequency inverters , 9300 vector frequency inverters
    AKB-ID: 20010008
    Last update: 2024/01/11
    Category: FAQ, Tipps und Tricks

    Lenze reserves the right to change information on this page at any time. Any liability for the accuracy of the information is excluded.

    Weitere Information

    Kontaktformular