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drive+motor efficiency calc(acs)

AC Drive Losses Formula
1. Constant Torque input data Motor 335 kW Motor eff. 96.3 % ACS 600 290 kVA Load p.u. Inverter Power Inverter Current Frequency/Hz Max 1 1 0 1 0 0.05 1 2.5 0.1 1 5 0.15 1 7.5 0.2 1 10 0.25 1 12.5 0.3 1 15 0.35 1 17.5 0.4 1 20 0.45 1 22.5 0.5 1 25 0.55 1 27.5 0.6 1 30 0.65 1 32.5 0.7 1 35 0.75 1 37.5 0.8 1 40 0.85 1 42.5 0.9 1 45 0.95 1 47.5 1 1 50 0 0 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73

Converter Losses in kW

0.1 10 0.83 0.83 0.83 0.83 0.83 0.83 0.84 0.84 0.84 0.84 0.84 0.85 0.85 0.85 0.85 0.86 0.86 0.86 0.86 0.87 0.87

0.2 20 1.02 1.02 1.03 1.03 1.03 1.04 1.04 1.05 1.05 1.06 1.06 1.07 1.07 1.08 1.09 1.10 1.10 1.11 1.12 1.13 1.14

0.3 30 1.27 1.27 1.28 1.28 1.29 1.30 1.30 1.31 1.32 1.33 1.34 1.36 1.37 1.38 1.39 1.41 1.42 1.43 1.45 1.46 1.48

2. Variable Torque

Load p.u. Inverter Power Inverter Current Frequency/Hz Max 1 1 0 0.00 0 0.05 0.00 2.5 0.1 0.01 5 0.15 0.02 7.5 0.2 0.04 10 0.25 0.06 12.5 0.3 0.09 15 0.35 0.12 17.5 0.4 0.16 20 0.45 0.20 22.5 0.5 0.25 25

0 0 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73

0.1 10 0.73 0.73 0.73 0.73 0.73 0.73 0.74 0.74 0.74 0.75 0.75

0.2 20 0.73 0.73 0.73 0.73 0.74 0.75 0.75 0.77 0.78 0.79 0.81

0.3 30 0.73 0.73 0.73 0.74 0.75 0.76 0.78 0.80 0.82 0.85 0.88

0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1

0.30 0.36 0.42 0.49 0.56 0.64 0.72 0.81 0.90 1.00

27.5 30 32.5 35 37.5 40 42.5 45 47.5 50

0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73 0.73

0.76 0.77 0.78 0.79 0.80 0.81 0.83 0.84 0.86 0.88

0.83 0.85 0.88 0.90 0.94 0.97 1.01 1.05 1.10 1.15

0.92 0.96 1.00 1.05 1.11 1.18 1.25 1.33 1.42 1.51

AC Motor Losses Formula
Sum Inverter Losses = Rectifier Losses = Cooling Fan = Leak Current = k1 = k2 = 0.4 0.5 40 1.56 1.57 1.57 1.58 1.59 1.60 1.62 1.63 1.65 1.66 1.68 1.70 1.71 1.73 1.75 1.77 1.79 1.82 1.84 1.86 1.89 50 1.90 1.90 1.91 1.92 1.94 1.95 1.97 1.99 2.01 2.03 2.06 2.08 2.11 2.13 2.16 2.19 2.22 2.25 2.28 2.31 2.35 0.1 0.0615 0.036 0.0015 0.001 0.75 0.9 0.6 60 2.27 2.27 2.29 2.30 2.32 2.34 2.36 2.39 2.42 2.44 2.48 2.51 2.54 2.58 2.61 2.65 2.69 2.73 2.77 2.81 2.86 must be 0,1 k*(InverterCurrent)^1,5 pu of total loss k*(Inverter Power)^1,5, pu of total loss p.u. of the total losses p.u. of the total losses To be selected acc. to measurements To be selected acc. to measurements 0.7 0.8 0.9 70 2.67 2.68 2.69 2.71 2.73 2.76 2.79 2.82 2.86 2.89 2.93 2.97 3.01 3.06 3.10 3.15 3.20 3.25 3.30 3.36 3.41 80 3.10 3.11 3.13 3.15 3.18 3.21 3.25 3.29 3.33 3.37 3.42 3.47 3.52 3.57 3.63 3.69 3.75 3.81 3.87 3.94 4.01 90 3.56 3.57 3.59 3.62 3.65 3.69 3.74 3.78 3.83 3.88 3.94 4.00 4.06 4.12 4.19 4.26 4.33 4.41 4.48 4.56 4.64

1 100 4.04 4.06 4.08 4.12 4.16 4.20 4.25 4.30 4.36 4.43 4.49 4.56 4.63 4.71 4.79 4.87 4.95 5.04 5.13 5.22 5.31 Max

0.4 40 0.73 0.73 0.74 0.75 0.77 0.79 0.81 0.84 0.87 0.91 0.96

0.5 50 0.73 0.73 0.74 0.76 0.78 0.81 0.84 0.88 0.93 0.99 1.06

0.6 60 0.73 0.73 0.75 0.77 0.80 0.84 0.88 0.93 1.00 1.07 1.16

0.7 70 0.73 0.73 0.75 0.78 0.82 0.86 0.92 0.99 1.07 1.16 1.28

0.8 80 0.73 0.74 0.76 0.79 0.84 0.89 0.96 1.05 1.15 1.26 1.40

0.9 90 0.73 0.74 0.77 0.81 0.86 0.93 1.01 1.11 1.23 1.37 1.53

1 100 0.73 0.74 0.78 0.82 0.88 0.96 1.06 1.17 1.31 1.48 1.66

1.02 1.08 1.15 1.23 1.32 1.42 1.53 1.66 1.79 1.94

1.13 1.22 1.32 1.43 1.56 1.70 1.86 2.03 2.22 2.42

1.26 1.38 1.51 1.66 1.82 2.01 2.21 2.44 2.69 2.96

1.40 1.55 1.71 1.90 2.11 2.34 2.60 2.88 3.20 3.54

1.55 1.73 1.93 2.16 2.42 2.70 3.02 3.36 3.74 4.16

1.71 1.93 2.17 2.44 2.74 3.08 3.46 3.87 4.33 4.83

1.88 2.13 2.41 2.73 3.09 3.49 3.93 4.41 4.94 5.53

AC Motor Losses Formula
Motor Losses 1. Constant Torque Motor kW 335 Efficiency[%] 96.3 Sinus losses 3.7 Multiplier 0.220 0.300 0.380 0.460 0.540 0.620 VSD losses(=1,1*Sinus) 4.07 No load 0.540 0.720 0.900 1.080 1.260 1.440 Inverter Power Inverter Current Frequency/Hz 0 0.1 0.2 0.3 0.4 0.5 1 1 0 10 20 30 40 50 0 1 0 1.81 2.41 3.02 3.62 4.22 4.82 0.05 1 2.5 1.96 2.62 3.27 3.93 4.59 5.25 0.1 1 5 2.11 2.82 3.53 4.25 4.96 5.67 0.15 1 7.5 2.26 3.03 3.79 4.56 5.33 6.09 0.2 1 10 2.41 3.23 4.05 4.87 5.69 6.51 0.25 1 12.5 2.56 3.43 4.31 5.19 6.06 6.94 0.3 1 15 2.71 3.64 4.57 5.50 6.43 7.36 0.35 1 17.5 2.86 3.84 4.83 5.81 6.80 7.78 0.4 1 20 3.01 4.05 5.09 6.13 7.17 8.21 0.45 1 22.5 3.16 4.25 5.35 6.44 7.53 8.63 0.5 1 25 3.31 4.46 5.61 6.75 7.90 9.05 0.55 1 27.5 3.46 4.66 5.86 7.07 8.27 9.47 0.6 1 30 3.61 4.87 6.12 7.38 8.64 9.90 0.65 1 32.5 3.76 5.07 6.38 7.69 9.01 10.32 0.7 1 35 3.91 5.28 6.64 8.01 9.37 10.74 0.75 1 37.5 4.06 5.48 6.90 8.32 9.74 11.16 0.8 1 40 4.21 5.68 7.16 8.64 10.11 11.59 0.85 1 42.5 4.36 5.89 7.42 8.95 10.48 12.01 0.9 1 45 4.51 6.09 7.68 9.26 10.85 12.43 0.95 1 47.5 4.66 6.30 7.94 9.58 11.22 12.85 1 1 50 4.81 6.50 8.20 9.89 11.58 13.28

Multipliers acc. To Type testing T

Multipliers acc. To Type testing TTMC040E.DOC

0.700 1.620 0.6 60 5.43 5.90 6.38 6.86 7.34 7.81 8.29 8.77 9.24 9.72 10.20 10.68 11.15 11.63 12.11 12.59 13.06 13.54 14.02 14.49 14.97

0.780 1.800 0.7 70 6.03 6.56 7.09 7.63 8.16 8.69 9.22 9.75 10.28 10.82 11.35 11.88 12.41 12.94 13.47 14.01 14.54 15.07 15.60 16.13 16.66

0.860 1.980 0.8 80 6.63 7.22 7.81 8.39 8.98 9.56 10.15 10.74 11.32 11.91 12.50 13.08 13.67 14.25 14.84 15.43 16.01 16.60 17.19 17.77 18.36

0.940 2.160 0.9 90 7.24 7.88 8.52 9.16 9.80 10.44 11.08 11.72 12.36 13.00 13.64 14.29 14.93 15.57 16.21 16.85 17.49 18.13 18.77 19.41 20.05

1.020 2.340 1 100 7.84 8.53 9.23 9.93 10.62 11.32 12.01 12.71 13.40 14.10 14.79 15.49 16.18 16.88 17.57 18.27 18.96 19.66 20.36 21.05 21.75

39.1 23.2 30.0 7.7 100

IEC2/978/CDV 43 25.5 33 8.5 110

Motor + Converter Losses in kW

0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 32.5 35 37.5 40 42.5 45 47.5 50

0 2.534 2.684 2.834 2.984 3.134 3.284 3.434 3.584 3.734 3.884 4.034 4.184 4.334 4.484 4.634 4.784 4.934 5.084 5.234 5.384 5.534

10 3.242 3.447 3.652 3.858 4.064 4.270 4.476 4.682 4.888 5.095 5.301 5.508 5.715 5.922 6.129 6.336 6.543 6.750 6.957 7.165 7.372

20 4.037 4.297 4.558 4.820 5.083 5.346 5.610 5.874 6.138 6.402 6.667 6.933 7.198 7.464 7.730 7.996 8.263 8.530 8.797 9.064 9.331

30 4.888 5.204 5.522 5.841 6.161 6.482 6.804 7.126 7.450 7.773 8.098 8.423 8.748 9.074 9.400 9.727 10.055 10.382 10.711 11.039 11.368

40 5.785 6.157 6.532 6.908 7.286 7.666 8.047 8.429 8.811 9.195 9.580 9.966 10.352 10.739 11.127 11.516 11.905 12.295 12.686 13.077 13.469

50 6.722 7.149 7.581 8.016 8.453 8.891 9.332 9.773 10.217 10.661 11.107 11.554 12.002 12.452 12.902 13.353 13.805 14.259 14.713 15.168 15.624

60 7.694 8.177 8.667 9.160 9.655 10.153 10.654 11.156 11.660 12.167 12.674 13.183 13.694 14.206 14.720 15.235 15.751 16.268 16.787 17.307 17.827

70 8.698 9.238 9.785 10.336 10.891 11.449 12.010 12.574 13.140 13.708 14.278 14.850 15.424 16.000 16.577 17.156 17.737 18.320 18.903 19.489 20.076

80 9.732 10.328 10.933 11.543 12.158 12.776 13.398 14.024 14.651 15.282 15.915 16.551 17.189 17.829 18.471 19.115 19.762 20.410 21.060 21.711 22.365

90 10.793 11.446 12.109 12.779 13.453 14.133 14.816 15.503 16.194 16.888 17.584 18.284 18.986 19.692 20.399 21.109 21.821 22.536 23.253 23.972 24.693

100 11.881 12.591 13.312 14.041 14.776 15.517 16.262 17.011 17.765 18.522 19.283 20.048 20.815 21.586 22.359 23.135 23.915 24.696 25.481 26.268 27.057

Motor + Converter Efficiency Motor kW Efficiency[%] Sinus losses VSD losses 335 96.3 3.7 4.07 Freq. Torque 1 0 0.0 0.5 2.5 1 5.0 1.5 7.5 2 10.0 2.5 12.5 3 15.0 3.5 17.5 4 20.0 4.5 22.5 5 25.0 5.5 27.5 6 30.0 6.5 32.5 7 35.0 7.5 37.5 8 40.0 8.5 42.5 9 45.0 9.5 47.5 10 50.0 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1 10.0 0.0 32.7 47.8 56.6 62.2 66.2 69.2 71.5 73.3 74.7 76.0 77.0 77.9 78.6 79.3 79.9 80.4 80.8 81.3 81.6 82.0 2 20.0 0.0 43.8 59.5 67.6 72.5 75.8 78.2 80.0 81.4 82.5 83.4 84.2 84.8 85.4 85.9 86.3 86.6 87.0 87.3 87.5 87.8 3 30.0 0.0 49.1 64.5 72.1 76.5 79.5 81.6 83.2 84.4 85.3 86.1 86.8 87.3 87.8 88.2 88.6 88.9 89.2 89.4 89.6 89.8 4 40.0 0.0 52.1 67.2 74.4 78.6 81.4 83.3 84.8 85.9 86.8 87.5 88.1 88.6 89.0 89.4 89.7 90.0 90.3 90.5 90.7 90.9 5 50.0 0.0 53.9 68.8 75.8 79.9 82.5 84.3 85.7 86.8 87.6 88.3 88.9 89.3 89.7 90.1 90.4 90.7 90.9 91.1 91.3 91.5 6 60.0 0.0 55.1 69.9 76.7 80.6 83.2 85.0 86.3 87.3 88.1 88.8 89.3 89.8 90.2 90.5 90.8 91.1 91.3 91.5 91.7 91.9 7 70.0 0.0 55.9 70.6 77.3 81.2 83.7 85.4 86.7 87.7 88.5 89.1 89.7 90.1 90.5 90.8 91.1 91.4 91.6 91.8 92.0 92.1

8 80.0 0.0 56.5 71.0 77.7 81.5 84.0 85.7 87.0 88.0 88.8 89.4 89.9 90.3 90.7 91.0 91.3 91.6 91.8 92.0 92.1 92.3

9 90.0 0.0 56.8 71.3 78.0 81.8 84.2 85.9 87.2 88.2 88.9 89.6 90.1 90.5 90.9 91.2 91.5 91.7 91.9 92.1 92.3 92.4

10 100.0 0.0 57.1 71.6 78.2 81.9 84.4 86.1 87.3 88.3 89.1 89.7 90.2 90.6 91.0 91.3 91.6 91.8 92.0 92.2 92.4 92.5

Motor 4,0 kW, 1500 RPM
100.0
80.0 Efficiency

60.0
40.0 20.0

80.060.040.020.0-

0.0 0.0 7.5 15.0
22.5

30.0

37.5

0.0

Load

0.0-20.0

Frequency

45.0

Motor 4,0 kW, 1500 RPM
95.0 90.0 85.0 80.0 75.0 70.0 65.0 60.0 55.0 50.0
0.0 10.0 20.0 30.0
40.0

80.0-100.0 60.0-80.0 40.0-60.0 20.0-40.0 0.0-20.0

Efficiency

50.0
60.0

70.0 80.0 90.0

Frequency

100.0


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