YASKAWA L1000A Technical Manual page 203

Setting 3: Vector motor (speed range for constant torque: 1:100)
Use this setting when operating a drive-dedicated motor that allows constant torque in a speed range 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
A: Max. speed for 200LJ and above
60 s
B: Max. speed for 160MJ to 180 LJ
C: Max. speed for 132MJ and below
100
90
Continuous
50
A
B
0 1
100120 167 200
Speed (%)
Setting 5: Constant torque PM motors (constant torque range of 1:500)
Sets protection characteristics needed when driving a PM with constant torque. These motors allow for a speed control
from 0.2% to 100% when operating with 100% load. Slower speeds with 100% load will trigger overload.
Overload Tolerance
Instantaneous rating (60 s)
150
125
115
100
83
77
67
0 0.2
Percent of base speed (%)
■
L1-02: Motor Overload Protection Time
Sets the detection time of motor overheat due to overload. This setting rarely requires adjustment, but should correlate
with the motor overload tolerance protection time for performing a hot start.
No.
L1-02
Defaulted to operate with an allowance of 150% overload operation for one minute in a hot start.
Figure 5.33 illustrates an example of the electrothermal protection operation time using a general-purpose motor
operating at the value of E1-06, Motor Base Speed, with L1-02 set to one minute.
During normal operation, motor overload protection operates in the area between a cold start and a hot start.
• Cold start: Motor protection operation time in response to an overload situation that was suddenly reached when
starting a stationary motor.
• Hot start: Motor protection operation time in response to an overload situation that occurred during sustained
operation at rated current.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Motor is designed to effectively cool itself at ultra-
low speeds.
C
Motor is designed to effectively cool itself at ultra-
low speeds (about 0.2% of base speed).
100 120 130 150
Name
Motor Overload Protection Time
5.8 L: Protection Functions
Cooling Ability
Continuous operation with 100% load from 0.5 Hz to
50 Hz.
Cooling Ability
Continuous operation with 100% load from 0.2% to
100% of base speed.
Setting Range
0.1 to 5.0 minutes
Overload Characteristics
Overload Characteristics
Default
1.0 minutes
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5