Delta Electronics VFD-E manual Introduction

Chapter 1 Introduction

1.2.2DC-bus Sharing: Connecting the DC-bus of the AC Motor Drives in Parallel

1.This function is not for VFD-E-T series.

2.The AC motor drives can absorb mutual voltage that generated to DC bus when deceleration.

3.Enhance brake function and stabilize the voltage of the DC bus.

4.The brake module can be added to enhance brake function after connecting in parallel.

5.Only the same power system can be connected in parallel.

6.It is recommended to connect 5 AC motor drives in parallel (no limit in horsepower).

power s hould be applied at the same time

(only the same power sy stem can be connected in parallel)

Power 115/208/220/230/380/440/480 (depend on models)

U V W	U V W	U V W	U V W
Brak e
module
IM	IM	IM	IM

For frame A, terminal + (- ) is c onnec ted to the terminal + ( -) of the brak e module.

For frame B and C, terminal + /B1 (- ) is c onnec ted to the terminal + ( -) of the brak e module.

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 1-11