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6-17
Group
Control mode
Comments
Function
Group
Flux
Vector
Open-loop
Vector
V/f
w/PG
V/f
Comments
Function
Terminal
H1
Digital Inputs
Function selection for multi-function inputs
OK
OK
OK
OK
e
a
H2
Digital Outputs
Function selection for multi-function outputs
OK
OK
OK
OK
H3
Analog Inputs
Adjustment/function selection for external analog inputs
OK
OK
OK
OK
H4
Analog Outputs
Adjustment/function selection for multi-function analog
outputs
OK
OK
OK
OK
H5
Serial Com Setup
Not Used. (Do not change this setting.)
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Protection
L1
Motor Overload
Sets electrical/thermal functions that protect the motor.
OK
OK
OK
OK
o ec o
L2
PwrLoss Ridethru
Selects the power-loss processing method.
OK
OK
OK
OK
L3
Stall Prevention
Accel/Decel stall prevention settings and selection
OK
OK
OK
OK
L4
Ref Detection
Frequency detection settings and selection
OK
OK
OK
OK
L5
Fault Restart
Fault restart function settings
OK
OK
OK
OK
L6
Torque Detection
Sets overtorque detection functions 1 and 2 (by current)
OK
OK
OK
OK
L7
Torque Limit
S
Torque limit function settings
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OK
OK
L8
Hdwe Protection
Hardware overheating and phase loss protection settings
OK
OK
OK
OK
Operator
o1
Monitor Select
Selects the Operator’s display and setting methods.
OK
OK
OK
OK
O e a o
o2
Key Selections
Operator’s key function selection and other parameters
OK
OK
OK
OK
6-3-2 Droop Control Function
Droop control is a function that allows the user to set the amount of motor slip. When a single load is
operated with two motors (such as in a crane conveyor), a high-resistance motor (a motor in which the
secondary winding’s resistance is increased resulting in an increased amount of slip) is normally used
to adjust the load balance, as shown in the following diagram.
The balance of the load is very different with different amounts of slip.
Torque
Load torque
Motor A’s torque
characteristics
Motor B’s torque
characteristics
Speed
Reference
speed
•
Load balance when using a general-purpose motor
Torque
Load torque
Motor A’s torque characteristics
Speed
Reference
speed
•
Load balance when using a high-resistance motor
Motor B’s torque characteristics
T
A
T
B
T
A
T
B
T
A
–T
B
>>0
T
A
–T
B
'
0
If droop control is used, a high-resistance motor’s characteristics can be set for a general-purpose mo-
tor. Also, it is easy to make adjustments while watching the load balance because the amount of slip can
be set arbitrarily.
Set the amount of slip in parameter b7-01 as the percentage of slip when the maximum frequency is
input and the rated torque is generated. Droop control is disabled if b7-01 is set to 0.0.
Advanced Operation
Chapter 6
Содержание SYSDRIVE 3G3FV
Страница 1: ...USER S MANUAL High function General purpose Inverter SYSDRIVE 3G3FV Cat No I516 E1 4 ...
Страница 16: ...Chapter 1 Introduction 1 1 Function 1 2 Nomenclature 1 3 New Functions 1 ...
Страница 33: ...Chapter 2 Installation 2 1 Mounting 2 2 Wiring 2 ...
Страница 112: ...Chapter 4 Trial Operation 4 1 Procedure 4 2 Operation Example 4 ...
Страница 289: ...Chapter 7 Parameter Lists 7 1 Initialize Mode Parameters 7 2 Program Mode Parameter List 7 ...
Страница 366: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9 ...
Страница 395: ...Chapter 10 Appendix 10 1 Notes on Using the Inverter for a Motor 10 ...