D6: Field Weakening And Field Forcing - YASKAWA GA700 Technical Manual

0 : Disabled
The speed limit bias is applied in the speed limit direction and the opposite direction.
1 : Enabled
The speed limit bias is applied in the opposite direction of the speed limit only.
◆

d6: Field Weakening and Field Forcing

d6 parameters set the field weakening and field forcing functions.
The field weakening function is used to reduce the energy consumption of the motor. It reduces the output voltage
of the drive to a predefined level. The function reduces the motor excitation current inversely proportional to
speed in a constant output range, and works so that the induced voltage of the motor does not exceed the power
supply voltage. Set H1-xx = 63 [Field weakening] ON to enable this function.
Note:
Use the Field Weakening function in constant light-load applications. To control the energy consumption of the motor under other load
conditions, use the b8 parameters [Energy Saving].
The Field Forcing function compensates the delaying influence of the motor time constant when changing the
excitation current reference and improves motor responsiveness. The function improves the development of the
actual motor excitation current by using a high motor excitation current reference for drive stat-up only.
Consequently, if the Field Forcing function is enabled, motor responsiveness will be better.
Note:
Field Forcing is ineffective during DC Injection Braking.
■
d6-01: Field Weakening Level
No.
Name
(Hex.)
d6-01 Field Weakening
Level
(02A0)
■
d6-02: Field Weakening Frequency Limit
No.
Name
(Hex.)
d6-02 Field Weakening
Frequency Limit
(02A1)
The field weakening command is enabled when the following conditions are both fulfilled.
• The output frequency is higher than or equal to the value set in d6-02.
• The speed agreement status is present.
■
d6-03: Field Forcing Selection
No.
Name
(Hex.)
d6-03 Field Forcing
Selection
(02A2)
0 : Disabled
1 : Enabled
■
d6-06: Field Forcing Limit
No.
Name
(Hex.)
d6-06 Field Forcing Limit
(02A5)
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Sets the output voltage of the drive when the Field weakening [H1-xx = 63]
is input as a percentage of the maximum output voltage.
V/f CL-V/f OLV CLV AOLV
Sets the minimum output frequency at which field weakening can be
activated.
V/f CL-V/f OLV CLV AOLV
Enables or disables the field forcing function.
V/f CL-V/f OLV CLV AOLV
Sets the maximum level at which the Field Forcing function can boost the
excitation current reference as a percentage of the motor no load current.
Normally there is no need to change this setting.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.5 d: Reference Settings
Default
(Range)
80%
(0 - 100%)
Default
(Range)
0.0 Hz
(0.0 - 590.0 Hz)
Default Setting
(Range)
0
(0, 1)
Default
(Range)
400%
(100 - 400%)
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