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Parameters
Control method
FR-F800
5 - 37
PM motor control
●
Highly efficient motor control and highly accurate motor speed control can be performed by using
the inverter with a PM (permanent magnet embedded) motor, which is more efficient than an
induction motor.
●
The motor speed is calculated based on the output voltage and current from the inverter. It does
not require a speed detector such as an encoder. The inverter drives the PM motor with the least
required current when a load is applied in order to achieve the highest motor efficiency.
●
Performing the IPM parameter initialization makes the IPM motor MM-EFS or MM-THE4 ready for
the PM motor control.
A magnetic field observer is a control method that calculates the motor speed/magnetic pole
position based on the motor voltage and current of a virtual motor which is set up in the inverter.
I003014E
Fig. 5-1:
PM motor control image
NOTES
The PM motor control requires the following conditions.
●
The motor described in the table below is used.
●
For the motor capacity, the rated motor current should be equal to or less than the rated
inverter current. (It must be 0.4 kW or higher.)
Using a motor with the rated current substantially lower than the rated inverter current will
cause torque ripples, etc. and degrade the speed and torque accuracies. As a reference, select
the motor with the rated motor current that is about 40% or higher of the rated inverter cur-
rent.
●
Single-motor operation (one motor to one inverter) is performed.
●
The overall wiring length with the motor is 100 m or less. (Refer to page 2-32.) (Even with the IPM
motor MM-EFS, MM-THE4, when the wiring length exceeds 30 m, perform offline auto tuning.)
●
A surge voltage suppression filter (FR-ASF/FR-BMF) or sine wave filter (MT-BSL/BSC) is not used.
Output
voltage
PM motor control image
Inverter
Speed
command
Controller
Inverter
circuit
Output
current
Magnetic field observer
Virtual motor
Speed/magnetic
pole position
Motor
Condition
Mitsubishi IPM motor (MM-EFS, MM-THE4)
Offline auto tuning is not required
IPM motor (other than MM-EFS, MM-THE4), SPM motor
Offline auto tuning is required
Содержание FR-F800
Страница 2: ......
Страница 4: ......
Страница 28: ...Related manuals Introduction 1 8 ...
Страница 104: ...Connection of stand alone option units Installation and wiring 2 76 ...
Страница 162: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Страница 720: ...Checking parameters changed from their initial values Initial value change list Parameters 5 558 ...
Страница 780: ...Measurement of main circuit voltages currents and powers Precautions for maintenance and inspection 7 20 ...
Страница 806: ...Outline dimension drawings Specifications 8 26 ...
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