Application and Operation
6.2 The Control Modes
Product User Manual
112 Operating Instructions, Version AE 12/2009, A5E01454341C
● Only Stage 1 Auto-Tuning can be used with synchronous motors.
● When you are performing Stage 1 Auto-Tuning, you must short the field winding to get a
proper setup of the stator resistance.
CAUTION
Never use Stage 2 Auto-tuning with synchronous motors.
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Figure 6-3 Harmony Drive Arrangement for Brushless Synchronous Motor (with no bypass)
6.2.4 Volts/Hertz Control (V/Hz)
This control mode should be used when the drive is connected to multiple motors in parallel.
The control algorithm is similar to that of Open Loop Vector Control (OLVC), but it does not
use some of the motor parameters in its control algorithm that OLVC does.
Note
Many of the features available with OLVC, such as fast bypass, spinning load, and slip
compensation, are not available with this method, as individual feedback and control of each
motor is not possible.
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