6-59
Note When the S-curve characteristic time is set, the acceleration and deceleration times will be
lengthened as follows:
Acceleration time = Selected acceleration time + (S-curve at beginning of accele S-curve
at end of acceleration) / 2
Deceleration time = Selected deceleration time + (S-curve at beginning of decele S-curve
at end of deceleration) / 2
H
Setting Motor Slip Compensation (C3)
•
The motor slip compensation function calculates the motor torque according to the output current, and
sets gain to compensate for output frequency.
•
This function is used to improve speed accuracy when operating with a load. It is mainly effective with
V/f control (without PG).
Parameter
Display name
Setting
Units
Default
Valid access levels
number
p y
g
range
setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
C3-01
Slip Come Gain
0.0 to
2.5
Multi-
ple
1.0 (See
note.)
Basic or
Adv.
___
Basic or Advanced
This parameter can be changed during operation.
Note When the control mode is switched, the factory default setting changes as follows:
V/f control: 0.0; V/f with PG: 1.0; open-loop vector 0; flux vector: 1.0
When “1.0” is set, this function compensates for the rated slip that has been set, by the rated torque
output.
With flux vector control, this becomes the gain to compensate for slip caused by motor temperature
variation. (Refer to page 6-34.)
Motor Slip Compensation Gain Adjustment Procedure
1. Correctly set the motor rated slip (parameter E2-02) and the motor no-load current (parameter
E2-03). The motor rated slip can be calculated by means of the following equation, using the num-
bers that are shown on the motor’s nameplate.
Motor rated slip = Motor rated frequency (Hz) – rated speed (r/min) x motor (No. of poles) / 120
(With vector control, the motor rated slip is automatically set by auto-tuning.
2. Set the slip compensation gain (parameter C3-01 to “1.0.” (If it is set to “0.0,” slip compensation will
be disabled.)
3. Operate with a load, measure the speed, and adjust the slip compensation gain (in increments of
0.1). If the speed is lower than the target value, increase the slip compensation gain. If the speed is
higher than the target value, decrease the slip compensation gain.
Parameter
Display name
Setting
Units
Default
Valid access levels
number
p y
g
range
setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
C3-02
Slip Come Time
0 to
10000
ms
200 (See
note.)
Adv.
---
Advanced
---
This parameter cannot be changed during operation.
Note When the control mode is switched, the values change as follows:
V/f control: 2,000; open-loop vector: 200
Advanced Operation
Chapter 6
Summary of Contents for SYSDRIVE 3G3FV
Page 1: ...USER S MANUAL High function General purpose Inverter SYSDRIVE 3G3FV Cat No I516 E1 4 ...
Page 16: ...Chapter 1 Introduction 1 1 Function 1 2 Nomenclature 1 3 New Functions 1 ...
Page 33: ...Chapter 2 Installation 2 1 Mounting 2 2 Wiring 2 ...
Page 112: ...Chapter 4 Trial Operation 4 1 Procedure 4 2 Operation Example 4 ...
Page 289: ...Chapter 7 Parameter Lists 7 1 Initialize Mode Parameters 7 2 Program Mode Parameter List 7 ...
Page 366: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9 ...
Page 395: ...Chapter 10 Appendix 10 1 Notes on Using the Inverter for a Motor 10 ...