Note:
• Continuous magnetization is only available in DTC motor control mode (see
page 26), and only when ramping is the selected stop mode (see parameter
21.3).
WARNING!
The motor must be designed to absorb or dissipate the thermal energy
generated by continuous magnetization, for example by forced ventilation.
Settings and diagnostics
Parameters: 6.21 Drive status word 3 (page 157), 21.1 Start mode (page 252), 21.2
Magnetization time (page 253), 21.8 DC current control…21.12 Continuous
magnetization command (page 258), 21.14 Pre-heating input source (page 259) and
21.16 Pre-heating current (page 259).
￭
Motor temperature estimation
The Motor temperature estimation function identifies the stator resistance and
estimates the initial temperature of the motor. The estimated temperature of the
motor can be used when the ambient temperature drops below zero celsius.
The temperature is estimated by feeding a DC current (25% of the motor nominal
current) into the motor for a time period of 4 seconds (default). The function uses
the resistance value at room temperature obtained during an ID run. For better
results, set correct temperature value in parameter 35.50 during ID run.
The function can be activated with parameter 21.37. The estimation time can be
defined with parameter 21.38. The function can be activated using either of the
two ways: With Drive start command or at Drive power-up (after control board
boot).
Settings and diagnostics
Parameters: 21.37 Motor temperature estimation (page 261), 21.38 Motor
temperature estimation time (page 262) and 35.50 Motor ambient
temperature (page 348).
￭
Hexagonal motor flux pattern
Note: This feature is only available in scalar motor control mode (see page 26).
Typically, the drive controls the motor flux so that the rotating flux vector follows
a circular pattern. This is ideal for most applications. However, when operating
above the field weakening point (FWP), it is not possible to reach 100% of the
output voltage. This reduces the peak load capacity of the drive.
Program features 95
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