MDA900Iss1.pdf

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EF

Installation Guide

MDA900

Parallel 24 Pulse Interbridge Lockout

Circuit

Part Number: 0410-0014

Issue Number: 1

www.controltechniques.com

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General Information

The manufacturer accepts no liability for any consequences resulting from inappro-

priate, negligent or incorrect installation or adjustment of the optional operating pa-

rameters of the equipment or from mismatching the variable speed drive (drive) with

the motor.

Thecontentsofthisguidearebelievedtobecorrectatthetimeofprinting. Inthe

interests of a commitment to a policy of continuous development and improvement,

the manufacturer reserves the right to change the specification of the product or its

performance, or the contents of the guide, without notice.

All rights reserved. No parts of this guide may be reproduced or transmitted in any

form or by any means, electrical or mechanical including photocopying, recording or

by an information storage or retrieval system, without permission in writing from the

publisher.

Copyright

© December 2001 Control Techniques Drives Limited

Issue Code:

1

Contents

1

Introduction

1

1.1

Circuit Function

1

2

Electrical Installation

2

2.1

Terminal Description

2

3

Mechanical Installation

4

MDA900 User Guide

Issue Number: 1

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1

I tr cti n

It is possible to extend the 12 pulse function of the Mentor drives to provide a 24 pulse

system by supplying two parallel 12 pulse systems from a transformer with four phase

shifted windings as shown in Figure 1.1 below.

24 Pulse system

power circuit wiring

0 o

30 o

15 o

45 o

E1

E2 E3

L1 L2 L3

E1

E2 E3

L1 L2 L3

E1

E2 E3

L1 L2 L3

E1

E2 E3

L1 L2 L3

Mentor

Drive 1

Mentor

Drive 2

Mentor

Drive 3

Mentor

Drive 4

A2

A1

A2

A1

A2

A1

A2

A1

IBR

IBR

IBR

M

Figure 1.1 System Overview

IBR = inter-bridge reactor

If any further information is required on 12 pulse systems, refer to the document Mentor

12 Pulse and 24 Pulse Systems which is available from the supplier of the drive.

1.1

Circuit Function

The drives should be programmed and connected for parallel 12 pulse operation, there

are no additional parameters to be set for 24 pulse operation.

If the drives are four quadrant then some extra logic is needed to control the bridge

interlocking.

The function of the circuit is to monitor which bridge is operating on each drive using

digital outputs on each drive. If any one drive tries to change bridge this circuit will

prevent the bridge changeover taking place until all of the drives are in a state which

allows a bridge changeover safely.

1

MDA900 User Guide

www.controltechniques.com

Issue Number: 1

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2

Electrical Installation

2.1

Terminal Description

Connector

Terminal number

Description

1

24V supply

2

0V

PL1 (Slave 3)

3

ST5 input

4

F10 output

1

24V supply

2

0V

PL2 (Master)

3

ST5 input

4

F10 output

1

24V supply

2

0V

PL3 (Slave 1)

3

ST5 input

4

F10 output

1

24V supply

2

0V

PL4 (Slave 2)

3

ST5 input

4

F10 output

MDA900 Iss.00.00

SIDE 1

CONTROL TECHNIQUES LTD

3130-0574

7004-1033

IC3

PARALLEL 24 PULSE INTERBRIDGE LOCKOUT CIRCUIT

C5

Output

St at u s

IC2

C6

IC1

1

PL2

4

1

PL3

4

1

PL4

4

1

PL1

4

Figure 2.1 MDA900 Board Layout

2

MDA900 User Guide

Issue Number: 1

www.controltechniques.com

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