YASKAWA CIPR-GA50C series Technical Manual page 667

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
4 : PM Variable Torque
Use this setting for PM motors with derated torque characteristics.
The overload tolerance decreases as motor speed decreases because the cooling fan speed decreases and the ability
of the motor to cool decreases in the low speed range.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protector.
This provides motor overheat protection from low speed to high speed across the full speed range.
Load Tolerance
5 : PM Constant Torque
Use this setting with a PM motor for constant torque that has a speed range for constant torque of 1:500.
The speed control for this motor is 0.2% to 100% when at 100% load. Operating slower than 0.2% speed at 100%
load will cause motor overload.
YASKAWA SIEPC71061753A GA500 Technical Manual
Cooling Capability
This motor is designed to withstand increased
temperatures during continuous operation in the low
speed range (10% base frequency).
Cooling Capability
This motor is designed to withstand increased
temperatures during continuous operation in the low
speed range (1% base frequency).
Cooling Capability
This motor is designed to withstand increased
temperatures during continuous operation at rated speed
and rated torque.
12.9 L: Protection Functions
Overload Characteristics
(at 100% motor load)
The motor operates continuously at 10% to 100% base
frequency. Operating slower than 10% speed at 100%
load will cause motor overload.
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)
If the motor operates continuously at lower speed than
rated rotation speed at more than 100% torque, the drive
will detect oL1. The drive triggers a fault relay output and
the motor coasts to stop.
12
667