Operating Instructions

Descriptions of Parameter Settings
Adjustment and Application
262 | 443
Pr.
Explanation
Settings
Default
10-49
Zero voltage time during start-up
0.000 to 60.000 sec.
0.000
● This parameter is valid only when the setting of Pr.07-12 (Speed Tracking during Start-up) = 0.
● When the motor is in static state at start-up, this increases the accuracy when estimating angles. In order to put
the motor in static state, set the three-phase of the drive output to the motor to 0 V. The Pr.10-49 setting time is
the length of time for three-phase output at 0 V.
● It is possible that even when you apply this parameter, the motor cannot go in to the static state because of
inertia or some external force. If the motor does not go into a complete static state in 0.2 seconds, increase this
setting value appropriately.
● If Pr.10-49 is set too high, the start-up time is longer. If it is too low, then the braking performance is weak.
Pr.
Explanation
Settings
Default
10-51
Injection frequency
0 to 1200 Hz
500
● This parameter is a high frequency injection command in PM SVC control mode, and usually you do not need
to adjust it. But if a motor’s rated frequency (for example, 400 Hz) is too close to the frequency setting for this
parameter (that is, the default of 500 Hz), it affects the accuracy of the angle detection. See the setting for
Pr.01-01 before you adjust this parameter.
● If the setting value for Pr.00-17 is lower than Pr.10-51*10, then increase the frequency of the carrier frequency.
● Pr.10-51 is valid only when Pr.10-53 = 2.
Pr.
Explanation
Settings
Default
10-52
Injection magnitude
115V / 230V models: 100.0V
460V models: 200.0V
575V models: 200.0V
Note: The setting range varies depending on the voltage.
15.0
30.0
37.5
● The parameter is the magnitude command for the high frequency injection signal in PM SVC control mode.
● Increasing the parameter can increase the accuracy of the angle estimation, but the electromagnetic noise
might be louder if the setting value is too high.
● The system uses this parameter when the motor’s parameter is “Auto”. This parameter influences the angle
estimation accuracy.
● When the ratio of the salient pole (Lq / Ld) is lower, increase Pr.10-52 to make the angle detection accurate.
● Pr.10-52 is valid only when Pr.10-53 = 2.
Pr.
Explanation
Settings
Default
10-53
Angle detection method
0: Disabled
1: Force attracting the rotor to zero degrees
2: High frequency injection
3: Pulse injection
0
● Set to 2 for IPM; set to 3 for SPM. If these settings cause problems, then set the parameter to 1.
● Speed adjustment parameter
Pr.
Explanation
Settings
Default
07-26
Torque compensation gain (V/F
and SVC control mode)
IM: 0 to 10 (when Pr.05-33 = 0)
PM: 0 to 5000 (when Pr.05-33 = 1 or 2)
1