Inverter-Driven 575V Class Motor - Mitsubishi Electric FR-V560 Instruction Manual

Motor
(6) Setting the number of encoder pulses and encoder rotation direction
Set the following parameters according to the encoder specification.
Parameter Name
Number of encoder
851
pulses
Encoder rotation
852
direction
The rotation direction of the encoder is displayed on the operation status indication (FWD,
REV) of the operation panel.
Pr. 852 Setting
0
Encoder
Forward rotation is clockwise rotation
when viewed from A.
1
Encoder
(factory setting)
Forward rotation is counterclockwise rotation
when viewed from A.
REMARKS
• The number of encoder pulses should be between 1000 and 4096.
1.5.2

Inverter-driven 575V class motor

In the PWM type inverter, a surge voltage attributable to wiring constants is generated at the motor terminals.
Especially for a 575V class motor, the surge voltage may deteriorate the insulation.
Surge voltage at a motor terminal by motor wiring length (reference)
When the 575V class motor is driven by the inverter, consider the following measures:
Measures
(1) Insulation-enhanced motor
Select an insulation-enhanced motor. Many motor manufacturers sell motors with insulation systems designed
to withstand the stress imposed by PWM inverters.
(2) AC reactor
For added protection, install an AC reactor on the inverter output.
Factory Setting
1024
1
Rotation direction of the encoder
A
CCW
A A
200
150
100%
0
10 20
Setting Range
0 to 4096
These are extended mode parameters. Set
"1" in Pr. 160 "extended function selection"
0, 1
CW
30 40 50 60 70 80
Motor wiring length (m)
10
Remarks
90 100