Speed Control Under Pm Motor Control - Mitsubishi Electric 800 Series Instruction Manual

5.3

Speed control under PM motor control

Purpose
To adjust the gain during PM
motor control
To stabilize torque feedback
signal
Speed control performs control so that the speed command and the actual motor rotation speed match.
5.3.1 Setting procedure of PM motor control
PM PM PM
This inverter is set for a general-purpose motor in the initial setting. Follow the following procedure to change the setting for the
PM motor control.
Operating procedure
1.
Set the motor. (Pr.9, Pr.71, Pr.80, Pr.81, Pr.83, Pr.84) (Refer to
Set "8093 (IPM motor)" or "9093 (SPM motor)" in Pr.71 Applied motor. Set Pr.9 Rated motor current, Pr.80 Motor
capacity, Pr.81 Number of motor poles, Pr.83 Rated motor voltage, and Pr.84 Rated motor frequency
according to the motor specifications.
(Setting "9999 (initial value)" in Pr.80 or Pr.81 selects V/F control.)
2.
Perform offline auto tuning for a PM motor. (Pr.96) (Refer to
Set "1" (offline auto tuning without rotating motor) in Pr.96, and perform tuning.
3.
Configure the initial setting for the PM motor control using Pr.998. (Refer to
When the setting for the PM motor is selected in Pr.998 PM parameter initialization, the PM motor control is
selected.
"8009": Parameter (rotations per minute) settings for a PM motor
"8109": Parameter (frequency) settings for a PM motor
"9009": Parameter (rotations per minute) settings for an SPM motor
"9109": Parameter (frequency) settings for an SPM motor
4.
Set parameters such as the acceleration/deceleration time and multi-speed setting.
Set parameters such as the acceleration/deceleration time and multi-speed setting as required.
5.
Set the operation command. (Refer to
Select the start command and speed command.
6.
Perform the test operation.
NOTE
• To change to the PM motor control, perform PM parameter initialization at first. If parameter initialization is performed after
setting other parameters, some of those parameters will be initialized too. (Refer to
initialized.)
• Constant-speed operation cannot be performed in the low-speed range of 150 r/min or less.
• During PM motor control, the RUN signal is output about 100 ms after turning ON the start command (STF, STR). The
delay is due to the magnetic pole detection.
154
5. PARAMETERS
5.3 Speed control under PM motor control
Speed control gain
adjustment
Torque detection filter
page 204.)
Parameter to set
P.G211 to P.G214, Pr.820, Pr.821, Pr.824,
P.G311 to P.G314 Pr.825, Pr.830, Pr.831,
Pr.834, Pr.835
P.G216, P.G316 Pr.827, Pr.837
page 351, 363.)
page 363.)
page
page 152
Refer to
page
155
158
151.)
for the parameters that are