5.3 Description of Function Codes 5.3.4 P codes (Motor 1 parameters)
Motor 1 (Synchronous motor magnetic pole position detection selection)
Related function codes:
P74: Synchronous motor 1 (Current command value when starting)
P87: Synchronous motor 1 (NS discrimination current command value)
d80: Synchronous motor 1 (Magnetic pole position draw-in frequency)
P30 specifies the magnetic pole position detection mode. Select the appropriate mode that matches the
synchronous motor to be used.
Magnetic pole position detection is not performed.
At the start of driving the motor, the inverter supplies current specified
by P74 to pull in the magnetic pole position.
In this position detection mode, the motor may rotate slightly in the
direction opposite to the commanded direction depending upon the
current motor shaft position.
1: IPM (interior permanent
magnet) motor method 1
The inverter starts the motor with the magnetic pole position detection
suitable for synchronous motors.
The reference current for polarity discrimination specified by P87
applies. Usually it is not necessary to change the factory default.
2: For SPMSM (Surface
permanent magnet
synchronous motor)
The inverter starts the motor with the magnetic pole position detection
suitable for surface magnet type synchronous motors.
3: Current draw method for IPM
motors
The inverter starts the motor with the magnetic pole position detection
suitable for synchronous motors causing no magnetic saturation.
In this position detection mode, the motor may rotate slightly in the
direction opposite to the commanded direction depending upon the
current motor shaft position.
4: For IPM (embedded magnet)
motor type 2
By superimposing high-frequency voltage on the motor control voltage,
the saliency of the IPM (interior permanent magnet) motor inductance is
used to improve the sensorless speed detection accuracy at low speed,
and to improve the speed control and torque limiting performance.
Depending on the synchronous motor characteristics, it may not be
possible to use this method.
This method can be used with the Fuji Electric standard synchronous
motor GNB2 series.
The reference current for polarity discrimination specified by P87 applies. Usually it is not necessary to
change the factory default.
During the magnetic pole position pull-in operation or the magnetic pole position detection, the motor
cannot generate enough torque. When applying to an application which requires torque when starting, use
the brake signal “BRKS” and magnetic pole position detection complete signal “PTD” to ensure that the
machine brake is not released until the magnetic pole position draw-in operation is complete.
( Function code E20)
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