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Load Tolerance
3 : Constant Torque 100:1 SpeedRange
Use this setting for vector motors with a speed range for constant torque of 1:100.
The speed control for this motor is 1% to 100% when at 100% load. Operating slower than 1% speed at 100%
load will cause motor overload.
Load Tolerance
6 : Variable Torque (50Hz)
Use this setting for general-purpose motors with a base frequency of 50 Hz.
The motor has less cooling capability in the low speed range because the cooling fan slows down. Therefore, there
is lower overload tolerance as the speed drops. The trigger point for the electronic thermal protector changes
according to the overload tolerance characteristics of the motor. This provides motor overload protection from low
speed to high speed across the entire speed range.
Load Tolerance
YASKAWA ELECTRIC SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
Cooling Capability
This motor is designed to withstand
increasing temperature during continuous
operation even in the low speed range (10%
base frequency).
Cooling Capability
This motor is designed to withstand
increasing temperature during continuous
operation even in the low speed range (1%
base frequency).
Cooling Capability
This motor is designed to operate using
commercial line power. The motor has
maximum cooling capability when operating
at a 50 Hz base frequency.
4 Standards Compliance
Overload Characteristics (at 100%
Motor Load)
The motor operates continuously at 10% to
100% base frequency.
Overload Characteristics (at 100%
Motor Load)
The motor operates continuously at 1% to
100% base frequency. Operating slower than
1% speed at 100% load will cause motor
overload.
Overload Characteristics (at 100%
Motor Load)
The drive detects oL1 when operating at
frequencies lower than commercial line
power. The drive triggers a fault relay output
and the motor coasts to stop.
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