Adtech iMASTER – A1 Series - Motor Control

A1-User’s Manual
１７０
8.2.29 Motor control
 98.01 Motor control mode
0: CT (V/f) ----- Initial value
1: VT (V/f)
2: SLV
 Set 0: CT(V/f) – Constant Torque
Frequency and voltage are controlled proportionately
Frequency rises until '30.01' (Maximum frequency) and voltage never rises above '99.02'
(Motor rated voltage)
100 %
F(Hz)
99.02 (Motor rated voltage)
V
Constant torque
30.01 (Maximum frequency)
 Set 1: VT(V/f) – Variable Torque
Reduced torque is effective for fan or pump application which do not require high torque at
low frequency. By reducing the output voltage, increased efficiency, lower noise, and lower
vibration.
V
Reduced torque
100 %
F(Hz)
99.02 (Motor rated voltage)
30.01 (Maximum frequency)
 Set 2: SLV – Sensorless Vector
For Sensorless Vector method, per specified output voltage, current, motor parameters,
motor rpm, the corresponding torque value is calculated. At very low frequency up to 0.5
Hz, high torque operation is possible