Table of Contents
Advertisement
Advanced Operation
7.2.2 Setting/Adjusting Motor Constants
7.2.2 Setting/Adjusting Motor Constants
7
Settings
D
Setting
10
Forward Torque Limit
11
Reverse Torque Limit
12
Regenerative Torque Limit
Torque reference (The input limits torque in both the forward and reverse directions during
13
speed control.)
15
Forward/Reverse Torque Limit (Limits torque in both the forward and reverse directions.)
The above table shows only those settings related to the torque limit function.
D
Set the analog input terminal's signal level, gain, and bias to match the actual input signal.
D
The factory default settings for the input terminal's signal level are as follows:
D
Terminal 16: 0 to +10 V (A 10 V input limits the torque to 100% of the motor's rated torque.)
Terminal 14: 4 to 20 mA (A 20 mA input limits the torque to 100% of the motor's rated torque.)
Figure 7.6 shows the relationship between the output torque and each torque limit.
Regenerative torque limit
Reverse
Reverse torque limit
Fig
7.6 Limiting Torque via Analog Inputs
When the forward torque limit has been set, the analog input signal acts as the limit value for torque
D
generated in the forward direction. The torque limit input is effective when torque is generated in the
forward direction even if the motor is operating in reverse (regenerative torque).
The torque limit is 100% of the motor's rated torque when the analog input is at its maximum value
D
(10 V or 20 mA). To increase the torque limit above 100%, set the input terminal's gain above 100%.
For example, a gain of 150.0% would result in a torque limit of 150% of the motor's rated torque with
a 10 V or 20 mA analog input.
J
Adjusting the V/f Pattern: E1-04 to E1-06, E1- -09, E1-13
Normally it isn't necessary to adjust the V/f pattern with flux vector control. Adjust the V/f pattern
D
when you want to change the maximum output frequency, maximum voltage, base frequency, or mini-
mum output frequency settings.
User
User
Constant
Number
E1-04
Max. output frequency
E1-05
Max. voltage
E1-06
Base frequency
E1-09
Min. output frequency
E1-13
Base voltage
* 1. These voltages are for the 200 V class; Double the voltage for 400 V class Inverters.
* 2. If E1-13 is set to 0.0, the same value as in E1-13 will be set for E1-05. It does not normally
need to be set separately.
Note 1.The default setting for E1-09 depends on the control method. The default settings shown
in the table are for flux vector control.
2. The three frequency settings must satisfy the following equation:
E1-04 (F
)
MAX
Output torque
Forward
direction
Reverse
direction
Change
Setting
Setting
during
during
Name
Range
Opera-
tion
40.0 to
400.0
0.0
255.0
0.0 to 400.0
0.0 to 400.0
0.0 to 255.0
E1-06 (F
) > E1-09 (F
)
A
MIN
- 12
Name
Forward torque limit
Motor speed
Forward
Regenerative torque limit
Valid Access Levels
Factory
Factory
Unit
Open Loop
Setting
Vector
Hz
60.0
Q
to
*1
VAC
Q
200.0
*1
Q
Hz
60.0
Hz
0.0
Q
*2
Q
VAC
0.0
Flux Vector
Q
Q
Q
A
Q
Advertisement
Chapters
Table of Contents
