4-264
Estimator Mode (22-26)
It is suggested to set 22-26=0 when SPM motor is used. Inverter starts in I/f mode and the relevant
adjustable parameters are 22-10 & 22-11.
It is suggested to set 22-26=1 when IPM motor is used and speed control mode is performed by the
speed control ratio 1:50. Inverter will input the continuously variable frequency signal to motor and the
relevant adjustable parameters are 22-27 & 22-28.
Mode 2 Voltage Command (22-27)
When 22-25=2 (Mode 2), if the rotor jitters at start, it is required to tune up the set value of mode 2 voltage
command to ensure the accuracy of the detection angle.
Note: When the voltage value is set too high, an overcurrent error may be occurs.
Mode 2 Frequency Division Ratio (22-28)
When 22-25=2 (Mode 2), the input continuous signal frequency by mode 2 depends on the carrier
frequency setting (parameter 11-01). It is recommended that the higher the carrier frequency is required to
increase appropriately the frequency ratio to reduce the input continuous signal frequcncy so as to ensure
the accuracy of the detection angle.
Field-Weakening Voltage Control (22-29)
It is set to prevent the output voltage’s saturation. This setting value performs field-weakening control
depending on the inverter’s input power supply and voltage to be the limitation of output voltage command.
If parameter 22-18 (Flux-Weakening Control) is set too low, the inverter’s output voltage will exceed the
voltage command control.
Speed Estimated Gain (22-30), Speed Estimated Filter Value (22-31)
When Estimator Mode 22-26 set to 0, adjust the speed response performance, the higher the setting value,
the faster the motor reacts, however, if the setting value is too high, the control object will generate
vibrations and become unstable, also, if the setting value is lower, the speed deviation will increase.
Please adjust to the appropriate setting value according to the field equipment.
MTPA Selection (22-32)
0: MTPA invalid
1: Distribute D-Q-axis current command according to the torque command.
2: Distribute D-Q-axis current command according to the torque command and restrict output voltage
(12-19) to below the motor’s rated voltage (22-01).
3: Distribute D-Q-axis current command according to the torque command and control the output voltage
(12-19) to around the motor’s rated voltage (22-01).
MTPA Gain (22-33)
When the default value is 200%, revising the PM motor’s D-axis inductance (22-15) or Q-axis inductance
(22-16) (such as completing the PM motor adjustment or directly changing the inductance value) will
re-calculate the MTPA Gain (22-33).
IPM Estimator Gain (22:34)
When the estimator mode (22-26) setting is 1, the estimator gain is the multiple of the bandwidth. The
larger the setting value, the faster the motor response. However, if the value is too high, the control item
will exhibit vibration and become unstable. The smaller the setting value, the greater the speed deviation.
Please adjust the appropriate setting value according to the site equipment.
To Next Page
Loading...
