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Summary of Contents for Control Techniques FXM5
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Page 1: User Guide
User Guide FXM5 Part Number: 0410-0011-05 Issue Number: 5 www.controltechniques.com... - Page 2 All rights reserved. No part of this User Guide may be reproduced or transmitted in any form or by any means, electrical or mechanical including photocopying, record- ing or by any information storage or retrieval system, without permission in writing from the publisher. Copyright © Septemaber 2002 Control Techniques Drives Ltd Issue Code: 5...
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Page 3: Table Of Contents
Contents Introduction Purpose of the FXM5 field-current controller System control modes Main features Data Installation Hazardous areas Environment Mounting instructions Cables and fuses Access to the power and signal connectors Power connections Armature connections and fuses EMC recommendations Signal connections... -
Page 4: Declaration Of Conformity
Declaration of Conformity Control Techniques, The Gro, Newtown, Powys, UK. SY16 3BE The AC variable speed drive product FXM5, current range 2A to 20A has been designed and manufactured in accordance with the following European harmonised, national and international standards:... -
Page 5: Introduction
1.2.4 Internal control of the field current The field current is set at a fixed level using a preset potentiometer in the FXM5 controller. The motor can then be run with a reduced field current at fixed or varying speed. - Page 6 1.3.3 Mounting arrangement The FXM5 controller is contained in a module which must be mounted on a vertical surface. Heat generated in the thyristors is dissipated to the air by a finned heatsink. Ingress protection conforms to IP10.
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Page 7: Data
Data The voltages present in the FXM5 controller are capable of inflicting a severe electric shock and may be lethal. The Stop function of the Drive does not remove dangerous voltages from the FXM5 controller or the driven machine. WARNING AC supplies to the FXM5 controller must be disconnected at least 5 minutes before any cover is removed or servicing work is performed. -
Page 8: Installation
This heater must be switched off when the FXM5 is in use; automatic switching is recommended. Install the FXM5 vertically for best flow of cooling air. When the FXM5 is installed in an enclosure, install the FXM5 as low as possible (without contravening EMC requirements). -
Page 9: Cables And Fuses
Figure 3-1 Mounting details Cables and fuses The AC supply inputs in the FXM5 controller are fitted with fuses for protection against overload and short circuits in the FXM5 controller and field-winding of the motor. These fuses will not protect the supply cables to the FXM5 controller. The... -
Page 10: Access To The Power And Signal Connectors
Cable size Maximum current and fuse rating Fuses fitted to the FXM5 controller printed-circuit board are as follows: Fuse Rating Type Protects... CT Part number 500mA 30mm Control-circuits power supply 3537-3251 Thyristor bridge and field 3537-3252 weakening Access to the power and signal connectors Remove the four corner screws and the front cover. -
Page 11: Power Connections
This maximises the resolution of the controller and prevents the possibility of excessive voltage being applied to the field winding. Figure 3-3 Connecting an alternative AC supply in phase with the field-winding supply FXM5 User Guide Issue Number: 5 www.controltechniques.com... -
Page 12: Armature Connections And Fuses
Using a Mentor II Drive When using the FXM5 controller with a Mentor II Drive, ensure that terminals L1 and L3 of the controller are connected to the same phases as L1 and L3 in the Drive. 3.6.2 AC supply voltage Figure 3-4 Locations of jumpers LK5 and LK6 Set jumpers LK5 and LK6 for the AC supply voltage. -
Page 13: Emc Recommendations
EMC recommendations Figure 3-5 EMC wiring recommendations To minimize radio-frequency emissions, it is necessary to install the FXM5 in a steel enclosure and pay attention to the arrangement of the wiring inside the enclosure. Any number of FXM5 controllers may be installed in an enclosure. - Page 14 • If the FXM5 is to be mounted in a machine that has a grounded metal case, and the motor cable is to be contained inside the case, the cable does not need to be shielded or armoured.
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Page 15: Signal Connections
Armature-voltage output signal voltage Common contact Contact closed when field current is Field-current failure relay normal Contact open when field current is normal 3.9.2 Digital control Figure 3-7 Power and signal connections for digital control FXM5 User Guide Issue Number: 5 www.controltechniques.com... - Page 16 N5; The Mentor II Drive then controls the bridge driver directly. Use Menu-6 parameters in the Mentor II Drive to set up and control the FXM5 controller. Remove the following jumpers from the power boards of the Mentor II Drive:...
- Page 17 Cut the wire jumper LK4 since stages N1, N2 and N3 are not used and must not affect the system (see section 4.2 Control-circuit description on page 16). Figure 3-9 Location of wire jumper LK4 FXM5 User Guide Issue Number: 5 www.controltechniques.com...
- Page 18 3.9.6 Field economy When the FXM5 controller is in normal use, connect TB1 terminal 1 to terminal 2. This can be achieved using external contacts. When field economy is required, the contacts should be opened. The field current is reduced to the minimum value set using RV2.
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Page 19: Setting Up
Figure 4-1 Control of armature voltage and field current with varying motor speed Refer to Figure 4-1. The FXM5 controller maintains the field current IF at a fixed value until base speed n is reached (detected by the armature voltage V reaching a maximum value). -
Page 20: Control-Circuit Description
The output of the DCCT is applied to a negative feedback loop so that, by varying the field-winding voltage, the FXM5 controller is in control of the field current. The setting of jumper LK1 and the number of primary-winding turns through the DCCT... -
Page 21: Setting The Thyristor Control Mode
0.1 (10%). When the FXM5 controller is operating normally, field-failure relay RL1 is energized by N6. When the field current is detected by N6 to be below the setting of RV2 (or the minimum current set by a Mentor II Drive), the relay is de-energized. The contacts can be used to break the AC supply to the armature. - Page 22 Use full-control under the following conditions: • When very rapid field-weakening is required • Motors that have an unusually long electrical time-constant --- - æ ö è ø FXM5 User Guide www.controltechniques.com Issue Number: 5...
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Page 23: Setting The Value Of Ifmax
Setting the value of I All system control modes 4.4.1 Description The maximum field current (I max) that can be delivered by the FXM5 controller depends on the following: • Number of primary-winding turns through the DCCT • Setting of jumper LK1 Refer to the following table. - Page 24 ------ - or ------ - When the FXM5 controller is used with a Mentor II Drive, parameter 6.11 must be set at the value stated in the table. The FXM5 controller is supplied having two turns through the DCCT. (The number of turns is defined by the number of times the wire passes through the hole in the DCCT).
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Page 25: Changing The Dcct Primary Winding Turns
4. Fit a 6.25mm (0.276in) spade receptacle to each end of the wire. 5. Connect the wire to the spade connectors on the board. 6. Set jumper LK1 at the setting given in the table. Figure 4-7 Location of jumper LK1 FXM5 User Guide Issue Number: 5 www.controltechniques.com... -
Page 26: Setting The Armature-Voltage Range
External control of the field-current Internal control of the field-current During the following procedures, you will be required to apply AC power to the FXM5 controller and the motor. Before applying AC power, ensure the following: The controller is correctly connected WARNING... - Page 27 To define a level for the field-failure relay to be de-energized, independently of the minimum required field current. 3. Release the TEST switch. 4. Remove AC power from the FXM5 controller and from the field winding of the motor. 4.7.3 Fixed field current Use the procedure given above to set the maximum field current.
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Page 28: Adjusting The Armature-Voltage Threshold
Adjusting the armature-voltage threshold Analog control mode During the following procedure, you will be required to apply AC power to the FXM5 controller and to run the motor. Before applying AC power, ensure the following: WARNING The controller is correctly connected... -
Page 29: Fault Finding
Fault Finding Users must not attempt to repair the FXM5 if it is faulty, nor carry out fault diagnosis other than through the use of the diagnostic features described in this section. WARNING Under no circumstances must the casing of the FXM5 be opened when the AC supply is connected. - Page 32 0410-0011-05...
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