5.3 Description of Function Codes 5.3.1 F codes (Fundamental functions)
Motor characteristics selection (F10)
F10 selects characteristics of cooling system of the motor.
Self-cooling fan of general-purpose motor (Self-cooling)
(When operating with low frequency, cooling performance decreases.)
Inverter-driven motor, High-speed motor with separately powered cooling fan
(Keep constant cooling capability irrespective to output frequency)
The electronic thermal operation characteristics diagram when F10 = 1 is set is shown below. The characteristics
coefficient α1 to α3 and the switch coefficient f2, f3 differ depending on the characteristics of the motor.
Each coefficient that is set by motor characteristics that is selected by motor capacitance and motor selection (P99)
is shown in the tables.
Characteristics diagram of motor cooling system
Table When P99 = 0, 4, or 5 (motor characteristics 0, other, motor characteristics 5)
Thermal time
constant τ
(Factory default)
Thermal time
constant setting
Standard current
value Imax
Characteristics coefficient
switch frequency
Characteristics
coefficient
Continuous
allowance current
value x 150 %
Detection level setting (F11)
fb = Base frequency
fb = 60 Hz for base frequency of
60 Hz or higher
To Next Page
Loading...
