Delta MS300 Series User Manual page 352

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
 Adjust the parameter will influence the response speed of speed estimator.
 If there is low frequency vibrates (the waveform is similar to sin wave) during the process, then
increase the gain. If there is high frequency vibrates (the waveform vibrates extremely and is like
spur), then decrease the gain.

 The parameter is the switch point which is from low frequency to high frequency. It will influence
the switch point of speed observer in high / low frequency area.
 If the switch point is too low, motor will generate not enough back emf to let the speed estimator
measure the right rotator's position and speed, and cause stall and oc when the frequency of
switch point is running.
 If the switch point is too high, the active area of I/F will be too wide, which will generate larger
current and cannot save energy. (The reason is that if the current of Pr. 10-31 sets too high, and
the high switch point will make the drive keeps outputting with the setting value of Pr. 10-31)

 The angle detection is fixed to 3: Use the pulse injection method to start. The parameter
influences the value of pulse during the angle detection. The larger the pulse is, the higher of the
accuracy of rotator's position. But larger pulse might cause oc easily.
 Increase the parameter when the running direction and the command are opposite while start-up.
If oc occurs in the start-up moment, then decrease the parameter.
 Please refer to Chapter 12-2 Adjustment & Application for detailed motor adjustment procedure.

 This parameter is valid only when the setting of Pr. 07-12 (Speed tracking during start-up) = 0.
 When the motor is in static status at the startup, the accuracy to estimate angles will be
increased. In order to make the motor in "static status", 3 phase of drive output 0V to motor to
reach this goal. The Pr. 10-49 setting time is the length of time when 3 phase output 0V.
 It is possible that even when this parameter is being applied but the motor at the installation site
cannot go in to the "static status" caused by the inertia or by any external force. So, if the motor
doesn't go into a completer "static status" in 0.2 sec, increase this setting value appropriately.
 If Pr. 10-49 sets too high, the start-up time will be longer obviously. If is too low, then the braking
performance will be weak.
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PM Sensorless Speed Estimator Low-pass Filter Gain
Settings 0.00~655.35
Frequency Point when Switch from I/F Mode to PM Sensorless Mode
Settings 0.00~599.00 Hz
Initial Angle Detection Pulse Value
Settings 0.0~3.0
Zero Voltage Time While Start Up
Settings 00.000~60.000 sec.
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Chapter 12 Description of Parameter SettingsMS300
12.2-5
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Factory Setting: 1.00
Factory Setting: 20.00
Factory Setting: 1.0
Factory Setting: 00.000
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