YASKAWA L1000A Series, Техническое руководство

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5.9 n: Special Adjustments
• n8: PM Motor Control Tuning
Parameters in the n 8 group are used to adjust the Initial Rotor Pole Position Search function and other PM motor control
related functions like the current control loop in CLV/PM or voltage saturation prevention (voltage limit).
■ Initial Rotor Pole Position Search Settings
When a PM motor with a non-absolute encoder such as an incremental encoder with a PG-X3 option is used, the drive
needs to search for the rotor pole position before it can operate the motor. This search is performed always:
• when the Up/Down command is issued for the first time after the power has been switched on.
• after one of the following errors occurred: dvl, dv2, dv3, dv4, dv6, dv7, PGo, PGoH.
• when an Up/Down command issued after the setting o f parameter n8-35 had been changed.
With default settings the drive will generate a dv8 error if initial rotor pole position search fails (n8-86 = 1). The brake
control output (H2-DD = 50) will not open in this case.
When not using the drive’s brake sequence, include the Motor Pole Search Status signal (digital output programmed for
H 2-D D = 61) so that the brake can open only if motor pole position search has been finished successfully. Refer to
Setting 61: Motor pole search status on page 183 for details.
■ n8-01: Initial Polarity Estimation Current
Sets the current used for the initial rotor position estimation as a percentage o f the motor rated current.
No. Name Setting Range Default
n8-01 Initial Polarity Estimation Current 0 to 100% 50%
■ n8-02: Pole Attraction Current
Sets the pull-in current used to detect rotor position. This setting rarely needs to be changed.
No. Name Setting Range Default
n8-02 Pole Attraction Current 0 to 150% 80%
■ n8-35: Initial Rotor Position Detection Selection
Selects how the rotor position is detected at start.
No. Name Setting Range Default
n8-35 Initial Rotor Position Detection Selection 1 or 2 1
Setting 1: High Frequency Injection
High frequency is injected in order to detect the rotor position. Some noise may be generated from the motor at start.
Setting 2: Pulse injection
A pulse signal is injected into the motor in order to detect the rotor position.
■ n8-36: High Frequency Injection Level
Sets the frequency level used for High Frequency Injection.
No. Name Setting Range Default
n8-36 High Frequency Injection 25 to 1000 Hz 500 Hz
■ n8-37: High Frequency Injection Amplitude
Sets the amplitude for High Frequency Injection as a percentage of the voltage (200 V or 400 V).
No. Name Setting Range Default
n8-37 High Frequency Injection Amplitude 0.0 to 99.9% 20.0%
208 YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual