3-88
Engineering Guide CDA3000
3 Selection of inverter module
Example: Calculation example for Figure 3.41
• Inverter module
CDA34.005
• Minimum ohmic resistance
of an external braking resistor
180
Ω
• Load cycle see
Figure 3.41
1. Calculation with L
U
D
RIVE
Figure 3.42
Calculation of effective braking power with L
U
D
RIVE
2. Choice of braking resistor (See section 6.3)
Braking resistor BR-270.02,541 was chosen
Peak braking power:
2080 W
Continuous braking power: 300 W
Resistance:
270
Ω
The resistance must not be less than the minimum ohmic connected load
permitted by the inverter module.