•
Using Vector Control Mode
Setting the control mode selection (n002) can use a vector control mode.
n002=0: V/f control mode (factory setting)
1: Vector control mode
•
Precaution for voltage vector control application
Since vector control needs motor parameters, the YASKAWA standard motor parameters have been set at the factory prior to shipment. Therefore, when an inverter exclusive-use motor is used or when a motor of any other manufacturer is driven, the required torque characteristics or speed control characteristics may not be maintained because the parameters are not matched. Set the following parameters so that they can match the motor parameters.
No.
Name Unit Setting range
Initial
Setting
∗ n106 Motor rated slip n107 Motor resistance per phase =
0.1Hz
0.001
Ω
(less than 10
Ω
)
0.01
Ω
(10
Ω
or more)
0.0 to 20.0Hz
0.000 to 65.5
Ω ∗ n036 Motor rated current n110 Motor no-load current
0.1A
1%
0 to 150% of inverter rated current
0 to 99%
(100%=motor rated current)
∗
150
∗ Setting depends on inverter capacity.
To adjust for slip compensation gain (n111), induce load so that motor speed reaches target value. Increase or decrease the value by 0.1.
• When speed is less than target value, increase slip compensation gain.
• When speed is more than target value, reduce slip compensation gain.
Adjustment of slip compensation gain time parameter (n112) is normally not required.
Adjust under the following conditions:
• Reduce the setting when response is low.
• Increase the setting when speed is unstable.
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Select slip compensation status during regeneration
N113 Setting
0
1
Slip Compensation during Regeneration
Disabled
Enabled
•
Motor parameter calculation
The following shows an example of motor parameter calculation:
(1) Motor rated slip (n106)
=
120
× motor rated frequency (Hz)
*1
---------------------------------------------------------------------------------------------
Number of motor pole
– Motor rated speed (r/min)
*2
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
120/Number of motor pole
(2) Motor resistance for one phase (n107)
Calculations are based on line-to-line resistance and insulation grade of the motor test report.
(E type insulation) Test report of line-to-line resistance at 75
°
C ( Ω ) x 0.92 x 1/2
(B type insulation) Test report of line-to-line resistance at 75
°
C ( Ω ) x 0.92 x 1/2
(F type insulation) Test report of line-to-line resistance at 115
°
C ( Ω ) x 0.87 x 1/2
(3) Motor rated current (n036)
= Rated current at motor rated frequency (Hz) *
1
(A)
(4) Motor no-load current (n110)
=
*1
----------------------------------------------------------------------------------------------------------
× 100%
Rated current (A) at motor rated frequency (Hz)
*1
*1 Base frequency (Hz) during rated output current.
*2 Rated speed (r/min) at base frequency during rated output current.
Set n106 (motor rated slip), n036 (motor rated current), n107 (motor resistance per phase) and n110 (motor no-load current) according to the motor test report.
When connecting a reactor between the inverter and the motor, set n108 to the value of n108 (motor leaking inductance) initial value + externally-mounted reactor inductance.
Initial setting should be used unless a reactor is installed.
Unless a reactor is connected, n108 (motor leakage inductance) does not have to be set according to the motor.
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•
V/f pattern during vector control
Set V/f pattern as follows during vector control.
The following examples are for 200V class motors. When using 400V class motors, double voltage settings (n012, n015, n017).
When operating with frequency larger than 60Hz/50Hz, change only maximum output frequency (n011).
PARAMETER OUTPUT
PARAMETER TORQUE VARIABLE OUTPUT
= 50Hz
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