VDL200 • Quick installation guide - Specifications and connection 9
The inverter converts the constant frequency and voltage of an existing three-phase network into DC voltage, from
which it obtains a new three-phase network with variable voltage and frequency. With this variable three-phase network
the speed of three-phase asynchronous motors can be controlled continuously.
1. Mains supply voltage
2. Mains choke (see chapter 5.2)
Converts AC voltage into DC voltage via a three-phase full wave bridge.
4. Intermediate circuit
With pre-load resistor and levelling capacitors DC voltage (U)
5. IGBT inverter bridge
Converts DC voltage into three-phase AC voltage with variable amplitude and frequency
Cards for controlling and regulating the closed and open-loop power section. Commands, references and reactions
are connected to these.
7. Output voltage
Three-phase AC voltage.
8. Speed feedback encoder (see paragraph "7.2.3 Feedback Connection")
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