*
For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-
2192
35
16
True Torque Control
Introduction
To maximize the performance of the motor/drive combination, the G3 must be tuned to the motor. G3s
have mathematical models of all standard efficient and premium efficient Houston-made Toshiba motors
stored on a ROM. These models are used by the drive to increase the motor’s low speed torque and to
reduce the load’s affect on RPM (when compared to its performance on a V/Hz drive). If a non-Toshiba
motor is being used, the G3 can model the motor by performing an ‘auto-tune’.
Programming for Toshiba/Houston motor
Group
Parameter
Value
UTILITY PARAMETERS
Blind Function Selection
1
UTILITY PARAMETERS
Motor Parameters Blind
1
FUNDAMENTAL PARAMETERS #1
Volts per Hertz Pattern
5
MOTOR PARAMETERS
Number of Motor Poles
(1)
MOTOR PARAMETERS
Motor Rated Capacity
(2)
MOTOR PARAMETERS
Motor Type
(3)
MOTOR PARAMETERS
Load Moment of Inertia
(4)
Programming for generic motor
Group
Parameter
Value
UTILITY PARAMETERS
Blind Function Selection
1
UTILITY PARAMETERS
Motor Parameters Blind
1
FUNDAMENTAL PARAMETERS #1
Volts per Hertz Pattern
5
MOTOR PARAMETERS
Number of Motor Poles
(1)
(2)
MOTOR PARAMETERS
Motor Rated Capacity
MOTOR PARAMETERS
Motor Type
2
(1)
MOTOR PARAMETERS
Motor Rated Voltage
(1)
MOTOR PARAMETERS
Motor Rated Frequency
(5)
MOTOR PARAMETERS
Motor Rated RPM
MOTOR PARAMETERS
Auto-Tuning Enable
1
Load Moment of Inertia
(4)
MOTOR PARAMETERS
(1)
Enter data from motor nameplate.
(2)
In KW. HP x 0.746 = KW.
(3)
Enter ‘0’ for an EQP3 (green) or ‘1’ for a high efficient (gray) motor.
(4)
If motor is uncoupled, set to small or medium. If drive displays “auto-tune error”, try a different setting
for load inertia.
(5)
Enter full-load RPM from motor nameplate (not synchronous RPM).
Notes:
With Toshiba motor, putting ‘0’ or ‘1’ for motor type results in better performance than auto-tuning.
The actual auto-tuning occurs at the start of the next run and lasts a fraction of a second.
If even better speed regulation is needed, see Guideline 14, Fine Tuning Speed Regulation.
Содержание G3
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