7 7.7 7.7.2 DC-bus operation Application examples Example 2 7.7.2 Example 2 - single-axis controller with multi axes Assumptions: ƒ 400 V, 3 AC/PE ƒ 4 axes in 3 power categories ƒ no particular dynamic performance requirements The following motors (Mx) are selected: For the above motor data, the following controllers (Gx) are selected: The power required by the drive system is determined with the below formula ( 7.5.5): P DCtotal = (10 kW / 0.93 + 0.50 kW) + (2.5 kW / 0.92 + 0.19 kW) + 2 * (1.2 kW / 0.90 + 0.12 kW) P DCtotal = 17.1 kW The calculated power requirement is used to select the single-axiscontroller with mains choke: Note:
Only the controller with mains choke reaches the required power. Checking the power efficiency: With 18.8 kW > 17.1 kW, P DC100% > P DCtotal . Select cables and fuses in accordance with the Technical data. L2 L1 L3 3 AC ... M M M M G 1 G x Fig. 7.7-2 Basic circuit diagram 7.7-2 EDS94SPP101 EN 3.1-04/2007 Motor type Rated power Efficiency Rated current Index [kW] [A] M1 MCS19P30 10.0 0.93 19 M2 MCS14H15 2.5 0.92 6.6 M3 ... M4 MCS09F38 1.2 0.90 2.5 Controller Rated power Typical motor power Power loss Pl Rated current Index [kW] [kW] [kW] [A] G1 E94ASxE0244 16.3 11.0 0.50 23.5 G2 E94AMxE0074 4.8 3.0 0.19 7.0 G3 ...
G4 E94AMxE0034 1.7 0.75 0.12 2.5 Controller (+ mains choke) Rated power (PDC100%) Index [kW] (G1) E94ASxE0244 + E94AZMS0314 18.8