Power Transmission Mechanism; Motor Torque - Delta C2000 series User Manual

2. Submersible motor:
The rated current is higher than that of a standard motor. Please check before operation and
choose the capacity of the AC motor drive carefully. With long motor cable between AC motor
drive and motor, available motor torque is reduced.
3. Explosion-proof (Ex) motor:
Needs to be installed in a safe place and the wiring should comply with the (Ex) requirements.
Delta AC Motor Drives are not suitable for (Ex) areas with special precautions.
4. Gear reduction motor:
The lubricating method of reduction gearbox and speed range for continuous operation will be
different and depending on brand. The lubricating function for operating long time at low speed
and for high-speed operation needs to be considered carefully.
5. Synchronous motor:
The rated current and starting current are higher than for standard motors. Please check before
operation and choose the capacity of the AC motor drive carefully. When the AC motor drive
operates more than one motor, please pay attention to starting and changing the motor.

Power Transmission Mechanism

Pay attention to reduced lubrication when operating gear reduction motors, gearboxes, belts and
chains, etc. over longer periods at low speeds. At high speeds of 50/60Hz and above, lifetime
reducing noises and vibrations may occur.

Motor torque

The torque characteristics of a motor operated by an AC motor drive and commercial mains power
are different.
Below you'll find the torque-speed characteristics of a standard motor (4-pole, 15kW):
AC motor drive
180
60 seconds 60 seconds
155
140
100
80
55
38
0 3 20
60
120
Frequency (Hz)
Base freq.: 60Hz
V/F for 220V/60Hz
60 seconds
140
130
100
85
68
45
35
0 3 20
50 120
Frequency (Hz)
Base freq.: 50Hz
V/F for 220V/50Hz
Chapter 12 Description of Parameter Settings|C2000 Series
180
155
100
55
38
0 3 20
60
Frequency (Hz)
Base freq.: 60Hz
V/F for 220V/60Hz
180
150
100
80
45
35
0
3 20
50
Frequency (Hz)
Base freq.: 50Hz
V/F for 220V/50Hz
17-6
Motor
60 seconds
120
60 seconds
120