Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Parameters
5 - 116
Speed feed forward control (Pr. 877 = "1")
●
When the load inertia ratio is set in Pr. 880, the required torque for the set inertia is calculated
according to the acceleration and deceleration commands, and the torque is generated quickly.
●
When the speed feed forward gain is 100%, the calculation result for speed feed forward is applied
as is.
●
If the speed command changes suddenly, the torque is increased by the speed feed forward
calculation. The maximum limit for the speed feed forward torque is set in Pr. 879.
●
The speed feed forward result can also be lessened with a primary delay filter in Pr. 878.
I002520E
Fig. 5-29:
Block diagram of speed feed forward control
NOTES
The speed feed forward control is enabled for the first motor.
Even if the driven motor is switched to the second motor while Pr. 877 = "1", the second motor is
operated as Pr. 877 = "0".
Under PM sensorless vector control, this function is available when low-speed range high-torque
characteristic is enabled by Pr. 788 "Low speed range torque characteristic selection" = "9999 (ini-
tial value)". (Refer to page 5-81.)
+
-
+
+
+
Speed feed forward control
Load inertia ratio
J•s
[Pr. 880]
Speed feed
forward
gain
[Pr. 881]
[Pr. 879]
Speed feed
forward torque
limit
[Pr. 878]
Speed feed
forward
limit
Speed control
integral time 1
[Pr. 821]
Speed
control P
gain 1
[Pr. 820]
Actual speed controller
Speed
command
Torque
control
Speed
estimator
M
Summary of Contents for FR-A820-00046 (0.4K)
Page 2: ......
Page 4: ......
Page 144: ...System configuration for Ethernet communication FR A800 E Installation and wiring 2 114 ...
Page 202: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 1090: ...Check first when you have a trouble Protective functions 6 50 ...
Page 1189: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1190: ...EC Declarations of Conformity Appendix A 50 ...
Page 1191: ...Appendix EC Declarations of Conformity FR A800 A 51 ...
Page 1192: ...EC Declarations of Conformity Appendix A 52 ...
Page 1193: ...Appendix EC Declarations of Conformity FR A800 A 53 ...
Page 1194: ...EC Declarations of Conformity Appendix A 54 ...
Page 1195: ...Appendix EC Declarations of Conformity FR A800 A 55 ...
Page 1196: ...EC Declarations of Conformity Appendix A 56 ...
Page 1197: ...Appendix EC Declarations of Conformity FR A800 A 57 ...
Page 1198: ...EC Declarations of Conformity Appendix A 58 ...
Page 1199: ...Appendix EC Declarations of Conformity FR A800 A 59 ...
Page 1200: ...EC Declarations of Conformity Appendix A 60 ...
Page 1201: ...Appendix EC Declarations of Conformity FR A800 A 61 ...
Page 1202: ...EC Declarations of Conformity Appendix A 62 ...
Page 1203: ...Appendix EC Declarations of Conformity FR A800 A 63 ...
Page 1204: ...EC Declarations of Conformity Appendix A 64 ...
Page 1205: ...Appendix EC Declarations of Conformity FR A800 A 65 ...
Page 1206: ...EC Declarations of Conformity Appendix A 66 ...
Page 1207: ...Appendix EC Declarations of Conformity FR A800 A 67 ...
Page 1208: ...EC Declarations of Conformity Appendix A 68 ...
Page 1209: ...Appendix EC Declarations of Conformity FR A800 A 69 ...
Page 1210: ...EC Declarations of Conformity Appendix A 70 ...
Page 1211: ...Appendix EC Declarations of Conformity FR A800 A 71 ...
Page 1212: ...EC Declarations of Conformity Appendix A 72 A 7 2 FR A846 series ...
Page 1213: ...Appendix EC Declarations of Conformity FR A800 A 73 ...
Page 1214: ...EC Declarations of Conformity Appendix A 74 ...
Page 1215: ...Appendix EC Declarations of Conformity FR A800 A 75 ...
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