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IPM motor control <IPM>
4
PARAMETERS
4.3 IPM motor control
<IPM >
Highly efficient motor control and highly accurate motor speed control can be performed by using the inverter with an IPM
motor.
The motor speed is detected by the output voltage and current of the inverter. It does not require a speed detector such as an
encoder. The inverter drives the IPM motor with the least required current when a load is applied in order to achieve the
highest motor efficiency.
4.3.1 Setting procedure of IPM motor control
<IPM >
* IPM parameter initialization is performed by setting Pr. 998 IPM parameter initialization or by selecting (IPM parameter initialization) on the
operation panel.
To change to the IPM motor control, perform IPM parameter initialization at first. If parameter initialization is performed after setting other
parameters, some of those parameters will be initialized too. (Refer to page 80 for the parameters that are initialized.)
Purpose Parameter that must be Set Refer to Page
To perform IPM parameter initialization IPM parameter initialization Pr.998 80
To perform IPM motor test Control method selection Pr.800 82
To adjust the gain for IPM motor control Adjusting the speed control gain Pr.820, Pr.821 84
POINT
The following conditions must be met to perform IPM motor control.
· For the motor model, dedicated IPM motor (MM-EFS model or MM-EF model) must be used.
·
The motor capacity must be equivalent to the inverter capacity. (The 0.75K inverter can be used with the 0.4kW
MM-EF
.)
· Single-motor operation (one motor run by one inverter) must be performed.
· The overall wiring length with the motor must be 100m or less.
· This inverter is set for a general-purpose motor in the initial setting. Follow the following procedure to change the setting for the
IPM motor control.
REMARKS
· "Er1" appears if IPM parameter initialization is performed while Pr.72 = "25."
· To use a 0.4kW MM-EF, set Pr.80 Motor capacity = "0.4" before setting IPM parameter initialization.
IPM
IPM
IPM
IPM
IPM
IPM
Test run
Perform IPM parameter initialization by selecting the parameter setting mode (IPM) on the operation panel.*
(Refer to page
79
)
Set the operation command. (Refer to page 122)
Set "1" or "12" in (IPM parameter initialization) to select IPM motor
control. Refer to page 79 for the setting method.
Setting value "1": MM-EF
Setting value "12": MM-EFS
P.RUN on the operation panel (FR-DU07) is lit when IPM motor control is set.
Set parameters such as the acceleration/deceleration time and multi-speed setting.
Set parameters such as the acceleration/deceleration time and multi-
speed setting as required.
Select the start command and speed command.