Mitsubishi Electric FR-E800, Инструкция по эксплуатации, Страница: 465 / 484

464
18. Appendix
18.3 Specification comparison between PM sensorless vector control and induction motor control
18.3
Specification comparison between PM sensorless
vector control and induction motor control
*1 For the motor capacity, the rated motor current should be equal to or less than the rated inverter current. (Note that the motor rated current should
be 0.4 kW or higher (0.1 kW or higher for the 200 V class).)
If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque accuracies may deteriorate due
to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter rated current.
*2 Available when a Vector control compatible option is installed.
NOTE
• Before wiring, make sure that the motor is stopped. Otherwise you may get an electric shock.
• Never connect a PM motor to a commercial power supply.
• No slippage occurs with a PM motor because of its characteristic. If an IPM motor, which took over an induction motor, is driven
at the same speed as for the general-purpose motor, the running speed of the IPM motor becomes faster by the amount of
the general-purpose motor's slippage. Adjust the speed command to run the IPM motor at the same speed as the induction
motor, as required.
Item PM sensorless vector control Induction motor control
Applicable motor
IPM motor or SPM motor
*1
Induction motor
*1
Starting torque 50%
200% (FR-E820-0175(3.7K) or lower, FR-E840-
0095(3.7K) or lower, FR-E860-0061(3.7K) or lower, FR-
E820S-0110(2.2K) or lower) and
150% (FR-E820-0240(5.5K) or higher, FR-E840-
0120(5.5K) or higher, FR-E860-0090(5.5K) or higher)
under Real sensorless vector control or Vector control
*2
Startup delay
Startup delay of about 0.1 s for magnetic pole position
detection. No startup delay (when online auto tuning is not performed
at startup).
Driving by the
commercial
power supply
Cannot be driven by the commercial power supply.
Can be driven by the commercial power supply. (Other
than vector control dedicated motor.)
Operation during
coasting
While the motor is coasting, potential is generated across
motor terminals. While the motor is coasting, potential is not generated
across motor terminals.
Torque control Not available
Real sensorless vector control or Vector control
*2