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Appendix C Setup Parameters
590 DRV Digital DC Drive Product Manual
App. C - 16
C
FIELD CONTROL::FLD CURRENT VARS::FLD WEAK VARS
Field weakening allow DC motors to operate above base speed in the constant horse-
power control range. For stable operation, the drive must have a speed feedback signal
generated by either an analog tachometer generator, Microtach or wire-ended encoder.
Inputs and Outputs
The input to FLD WEAK VARS is the BACK EMF from CALIBRATION. The
output provides the field weakening current demand to FLD CURRENT VARS.
Description
Setting FLD WEAK ENABLE to ENABLED activates the control loop for controlling
the motor back EMF during field weakening.
EMF LEAD, EMF LAG and EMF GAIN tune the control loop for field weakening.
The units for the lead and lag terms are in hundredths of milliseconds. Multiply the
value by 100 to yield milliseconds. The gain term should also be multiplied by 100 to
yield the actual gain term.
MAX VOLTS sets the voltage level where field weakening begins. When set to 100%,
field weakening begins at the drive calibrated voltage determined by the resistor, or
switchable calibration card settings and the value set in ARMTURE V CAL. During
startup, MAX VOLTS can be set lower than 100% during actual operation.
MIN FLD CURRENT should be set 10% below the desired field current needed to
attain maximum speed. This allows enough field current for the drive to maintain
transient control of the motor. Setting this parameter below 6.00% will trip the FIELD
FAIL alarm.
The back EMF feedback filter limits armature voltage overshoot when the motor
accelerates through base speed. The ratio BEMF FBK LEAD to BEMF FBK LAG
should be greater than one to provide an overall lead for the filter. Ratios should be
kept below three for stable control. When they are equal, the BEMF filter is disabled.
DIGITAL DC DRIVE
MENU LEVEL
MENU LEVEL
DIAGNOSTICS
MENU LEVEL
SETUP PARAMETERS
SETUP PARAMETERS
RAMPS
SETUP PARAMETERS
AUX I/O
SETUP PARAMETERS
JOG/SLACK
SETUP PARAMETERS
SETUP PARAMETERS
SETUP PARAMETERS
RAISE/LOWER
SPECIAL BLOCKS
FIELD CONTROL
FIELD CONTROL
FLD CURRENT VARS
FLD CURRENT VARS
FIELD ENABLE
SETPOINT
FLD WEAK VARS
FIELD CONTROL
FLD CURRENT VARS
M
M
M
M
Parameters
Tag Parameter
Description
Range
Default
174
FLD. WEAK ENABLE
Enables field weakening mode.
ENABLED/DISABLED
DISABLED
175
EMF LEAD
Lead time adjustment of the PI loop.
0.00 to 50.00
2.00
176
EMF LAG
Lag time adjustment of the PI loop.
0.00 to 200.00
40.00
177
EMF GAIN
Gain adjustment of the PI loop.
0.00 to 100.00
0.30
179
MIN FLD CURRENT
Minimum value for field current needed for max speed. 0.00 to 100.00%
10.00%
178
MAX VOLTS
Voltage level where field weakening begins.
0.00 to 100.00%
100.00%
191
BEMF FBK LEAD
Lead time for BEMF filter
10 to 5000 msecs
100
192
BEMF FBK LAG
Lag time for BEMF filter
10 to 5000 msecs
100
Содержание 590 DRV Digital
Страница 2: ......
Страница 16: ...1 4 Chapter 1 Introduction 1 590 DRV Digital DC Drive Product Manual ...
Страница 22: ...2 6 2 Chapter 2 Identification 590 DRV Digital DC Drive Product Manual ...
Страница 45: ...Figure 3 20 Wiring Circuit Diagram for 590 DRV Digital Drive ...
Страница 77: ...5 22 5 590 DRV Digital DC Drive Product Manual Chapter 5 Troubleshooting ...
Страница 103: ...App A 18 A Appendix A Technical Description 590 DRV Digital DC Drive Product Manual ...
Страница 107: ...B Appendix B Using the Man Machine Interface App B 4 590 DRV Digital DC Drive Product Manual ...
Страница 114: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 7 C Figure C 8 Aux I O ...
Страница 120: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 13 C t Figure C 13 Field Control ...
Страница 122: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 15 C Figure C 14 Field Current Variables ...
Страница 124: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 17 C Figure C 15 Field Weakening Variables ...
Страница 126: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 19 C Figure C 16 Current Profile ...
Страница 128: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 21 C t t t Figure C 17 Stop Rates ...
Страница 134: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 27 C Figure C 22 Setpoint Sum ...
Страница 138: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 31 C Figure C 25 Speed Loop ...
Страница 142: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 35 C Figure C 27 Speed Loop Setpoints ...
Страница 144: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 37 C Figure C 28 Current Loop ...
Страница 146: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 39 C Figure C 29 Inhibit Alarms ...
Страница 148: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 41 C Figure C 30 Calibration t ...
Страница 149: ...Appendix C Setup Parameters 590 DRV Digital DC Drive Product Manual App C 42 C ...
Страница 169: ...Appendix D I O Configuration System Menu App D 20 D 590 DRV Digital DC Drive Product Manual Figure D 17 Block Diagram ...
Страница 173: ...Appendix D I O Configuration System Menu App D 24 D 590 DRV Digital DC Drive Product Manual ...
Страница 174: ...Figure D 20 590 DRV Digital DC Drive Software Block Diagram t t t t ...
Страница 202: ...App F 18 Appendix F Spare Parts List 590 DRV Digital DC Drive Product Manual F ...
Страница 208: ...Appendix G RS232 System Port P3 590 DRV Digital DC Drive Product Manual App G 6 G ...
Страница 234: ...Appendix H RS422 Communications Ports P1 P2 590 DRV Digital DC Drive Product Manual App H 26 H ...
Страница 250: ...Appendix J Parameter List by Menu App J 8 J 590 DRV Digital DC Drive Product Manual ...
Страница 258: ...Appendix K Parameter List by Parameter Name 590 DRV Digtial DC Drive Product Manual App K 8 K ...
Страница 318: ...590 DRV Digital DC Drive Product Manual App M 38 Appendix M Special Blocks and Application Notes M ...