YASKAWA CIMR-VU BA0001 Technical Manual page 214

5.8 L: Protection Functions
Overload Tolerance
150
Rated Speed=100% Speed
60 sec.
100
55
50
Continuous
0
110 100120 167 200
(60 Hz)
Speed (%)
Setting 3: Vector Motor (constant torque, 1:100)
Use this setting when operating a drive dedicated motor with a torque ratio of 1:100. This motor type is allowed to run with
100% load from 1% up to 100% speed. Running slower speeds with full load can trigger an overload fault.
Overload Tolerance
150
Rated Speed=100% Speed
60 sec.
100
90
Continuous
50
0 1
100120 167 200
(60 Hz)
Speed (%)
Setting 4: PM Derated Torque Motor
This setting is for operating a PM motor. PM motors for derated torque have a self-cooling design, so the overload tolerance
drops as the motor slows. Electronic thermal overload is triggered in accordance with the motor overload characteristics,
providing overheat protection across the entire speed range.
Overload Tolerance
150
120
100
80
50
10
0
Motor Speed (%)
Setting 6: General-Purpose Motor
Note: General-purpose motors are designed with a base speed that operates at line frequency (50/60 Hz depending on geographic region).
Because the motor is self-cooled, the overload tolerance drops when the motor speed is lowered. The drive appropriately
adjusts the electrothermal trigger point according to the motor overload characteristics and protects the motor from overheat
throughout the entire speed range.
214
A
D
B
A
B
D
60 sec.
Continuous
33
100
Cooling Ability
Motor is designed to effectively cool
itself at speeds as low as 6 Hz.
Cooling Ability
Motor is designed to effectively cool
itself at speeds as low as approximately
0.6 Hz.
Cooling Ability
Motor is designed to produce 100%
torque at base speed. Built with
effective cooling capabilities.
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
Overload Characteristics
Continuous operation with 100% load
from 6 Hz to 50/60 Hz.
Overload Characteristics
Continuous operation with 100% load
from 0.6 Hz to 50/60 Hz.
Overload Characteristics
Reaching 100% when operating at
below the base frequency causes a
motor overload fault (oL1). The drive
fault output closes and the motor
coasts to stop.