Yaskawa G5HHP Drive - Manual (Page 193)

7.3 Flux Vector Control
7 - 29
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The factory default settings for the input terminal’s signal level are as follows:
•
Terminal 42: 0 to +10 V (A 10 V input limits the torque to 100% of the motor’s rated torque.)
•
Terminal 39: 4 to 20 mA (A 20 mA input limits the torque to 100% of the motor’s rated torque.)
Figure 7.15 shows the relationship between the output torque and each torque limit.
Output torque
Forward
direction
Reverse
direction
Regenerative torque limit
Reverse torque limit
Motor speed
Reverse Forward
Forward torque limit
Regenerative torque limit
Fig 7.15 Limiting Torque via Analog Inputs
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When the forward torque limit has been set, the analog input signal acts as the limit value for torque
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).
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The torque limit is 100% of the motor’s rated torque when the analog input is at its maximum value (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.
7.3.6 Setting/Adjusting Motor Constants
J
Adjusting the V/f Pattern: E1-04 to E1-07, E1-13
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Normally it isn’t necessary to adjust the V/f pattern with flux vector control. Adjust the V/f pattern when
you want to change the maximum output frequency, maximum voltage, base frequency, or minimum
output frequency settings.
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
E1-04
Max. output frequen-
cy
x
50.0 to
150.0
Hz 60.0 Q Q Q Q
E1-05 Max. voltage x
0.0 to
510.0 *1
VAC 400.0 *1 Q Q Q Q
E1-06 Base frequency x 0.0 to 150.0 Hz 60.0 Q Q Q Q
E1-09
Min. output frequen-
cy
x 0.0 to 150.0 Hz 0.0 Q Q Q A
E1-13 Base voltage x 0.0 to 510.0 VAC 0.0 *2 A A Q Q
* 1. These voltages are for the 400-V Class Inverters; multiply the voltage by approx. 1.5 for
575-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
) ≥ E1-06 (F
A
) > E1-09 (F
MIN
)
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