Mitsubishi Electric FR-F800 Series Instruction Manual page 668

Frequency
setting and
resolution
(based on the
motor rating)
Output signal
Carrier frequency
Automatic restart after
instantaneous power failure
Startup delay
Driving by the commercial power
supply
Operation during coasting
Maximum motor wiring length
*1 Select a motor with the rated current equal to or less than the inverter rated current. (It must be 0.4 kW or higher.)
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 For the MM-EFS (1500 r/min specification), the number of motor poles differs between the 15 kW or lower motor (6 poles) and the 18.5 kW or
higher motor (8 poles). For this reason, the frequency setting resolution also differs between them.
*3 For the FR-F820-02330(55K) or lower and FR-F840-01160(55K) or lower.
*4 For the FR-F820-03160(75K) or higher and FR-F840-01800(75K) or higher.
NOTE
• Before wiring, make sure that the motor is stopped. Otherwise you may get an electric shock.
• Never connect an IPM motor to the commercial power supply.
• No slippage occurs with an IPM 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.
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Item
MM-EFS (1500 r/min specification) 15 kW or
*2
lower and MM-THE4: 0.018 Hz
Terminals 2 and 4
MM-EFS (1500 r/min specification) 18.5 kW or
(0 to 10 V / 12 bits)
*2
higher : 0.025 Hz
MM-EFS (3000 r/min specification): 0.036 Hz
MM-EFS (1500 r/min specification) 15 kW or
Terminals 2 and 4
*2
(0 to 5 V / 11 bits or lower and MM-THE4: 0.036 Hz
0 to 20 mA / 11 bits) MM-EFS (1500 r/min specification) 18.5 kW or
Terminal 1
*2
higher : 0.050 Hz
(0 to ±10 V / 12 bits)
MM-EFS (3000 r/min specification): 0.072 Hz
MM-EFS (1500 r/min specification) 15 kW or
*2
lower and MM-THE4: 0.072 Hz
Terminal 1
MM-EFS (1500 r/min specification) 18.5 kW or
(0 to ±5 V / 11 bits)
*2
higher : 0.100 Hz
MM-EFS (3000 r/min specification): 0.144 Hz
In the initial setting, 1 mA is output at the rated
motor frequency from across terminals FM and
Pulse output for SD. (SD is a common terminal.)
meter The permissible frequency load current is 2 mA.
Pulse specification: 1440 pulses/s at the rated
motor frequency
Four patterns of 2 kHz, 6 kHz, 10 kHz, and 14
*3
kHz
Two patterns of 2 kHz and 6 kHz
No startup delay time.
Using the regeneration avoidance function
together is recommended.
Startup delay of about 0.1 s for initial tuning.
Not available.
Never connect an IPM motor to the commercial
power supply.
While the motor is coasting, an electrical potential
is generated across motor terminals.
Before wiring, make sure that the motor is
stopped.
100 m or shorter
search engine
PM motor control
*4
9.4 Specification comparison between PM motor control and induction motor control
Induction motor control
0.015 Hz (60 Hz rating)
0.03 Hz (60 Hz rating)
0.06 Hz (60 Hz rating)
In the initial setting, 1 mA is output at 60 Hz from
across terminals FM and SD. (SD is a common
terminal.)
The permissible frequency load current is 2 mA.
Pulse specification: 1440 pulses/s at 60 Hz
Selectable between 0.75 kHz to 14.5 kHz
*4
0.75 kHz to 6 kHz
Startup waiting time exists.
No startup delay.
Can be driven by the commercial power supply.
While the motor is coasting, no potential is
generated across motor terminals.
Overall length: 500 m or shorter
1
2
3
4
5
6
*3
7
8
9
10
667
9. APPENDIX