Delta MS300 Series User Manual page 437

Chapter 12 Descriptions of Parameter SettingsMS300
10-42
Initial Angle Detection Pulse Value

Settings
 The angle detection is fixed to 3: Use the pulse injection method to start. The parameter
influences the value of the pulse during the angle detection. The larger the pulse, the higher the
accuracy of rotor's position. A larger pulse might cause oc.
 Increase the parameter when the running direction and the command are opposite during start-
up. If oc occurs at start-up, then decrease the parameter.
 Refer to Section 12-2 Adjustment & Application for detailed motor adjustment procedure.
10-49
Zero Voltage Time during Start-up

Settings
 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.
10-51
Injection Frequency

Settings
 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. Refer to 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.
10-52
Injection Magnitude

Settings
 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
0.0–3.0
0.000–60.000 sec.
0–1200 Hz
115V / 230V models: 100.0 V
460V models: 200.0 V
575V models: 200.0 V
NOTE: The setting range varies depending on the voltage.
428
Default: 1.0
Default: 0.000
Default: 500
Default: 15.0 / 30.0 / 37.5