Nidec Leroy-Somer Powerdrive MD Smart, Integration Manual

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15
GENERAL INFORMATION
Powerdrive MD Smart Integration Guide
5751 en - 2021.10 / e
GENERAL
INFORMA
TION
Absorbed line current, MDR
THDI (*) <5%
The active rectifier is incorporated into an MD3INV inverter chassis.
Since the DC output of an active rectifier consists of a high value of capacitors, it is imperative, when powering on, to gradually
raise the voltage of the DC bus before unlocking the rectifier. This preload operation is possible with the MD3PRG module (for
details, see §1.2.3 ).
For normal conditions of use, the active rectifier shall incorporate:
- Filtering: an RFI filter, a Regen reactor and a LC sine filter,
- an MD3INV inverter,
- an MD3PRG preload module.
Filtering
MD3PRG
Rectifier
MD3INV