Motor Types According To Protection Structure; Constant-Torque Motor - Mitsubishi Electric FR-A700 Technical Manual

3.3 Operation of various motors
A variety of motors are available; various types of motors
classified according to protection types and structure,
those provided with equipment such as brakes and speed
reducers, and special-purpose motors. When identical to a
general-purpose three-phase
characteristics, any motor can be run by the inverter
without fault.
3.3.1

Motor types according to protection structure

Type
Drip-proof type
Totally-enclosed fan-cooled type
Totally-enclosed fan-cooled,
outdoor type
Totally-enclosed fan-cooled,
corrosion-proof type
Explosion-protected type
3.3.2

Constant-torque motor

A constant-torque motor is a motor dedicated to inverter
operation which can be run continuously without reducing
the load torque even in the low speed range.
provides a 100% constant torque from 3 to 60Hz under
Real sensorless vector control. (from 10 to 60Hz for 45kW,
55kW)
Continuous use within the rated range (Real sensorless vector control)
SF-HRCA type
60Hz torque reference
(when inverter is 0.4kW to 7.5kW)
Maximum torque for
short time (0.4kW to 3.7kW)
200
Maximum torque
for short time
(5.5kW to 7.5kW)
150
Continuous
operation torque
100
70
(60)
63
(50)
50
(45)
45
(40)
0
0.3 3 60
Output frequency (Hz)
Values in parenthesis apply to the 0.4kW to 0.75kW
motor in electrical
Motor Protection Structure
Type Code
SB-JR, SB-TH
SF-JR, SF-HR, SF-TH
SF-JRO, SF-HRO, SF-THO
SF-J, SF-TH, CF-J, CF-TH, SF-
HJ
XF(E)-NE
XF-E, XF-LH
A700
60Hz torque reference
(when inverter is 11kW to 30kW)
Maximum torque for
short time
150
220V
Continuous
operation torque
100
200V
85
80
60
57
0
0.3 3
120
Output frequency (Hz)
For motors which have different electrical characteristics,
adjustment is required in torque boost function ([Pr. 0]) of V/
F pattern (Refer to page 486 for Starting Torque Boost), or
a dedicated inverter which is matching to the motor
characteristics may be required.
When using a motor designed for commercial power
supply (50Hz or 60Hz) with the inverter, set the base
frequency of the inverter ([Pr. 3]) to 50Hz or 60Hz.
Protection
Code
IP 22
IP 44
Available with a standard inverter
IP 44
(Vertical or flange type is also available)
IP 44
Explosion-proof test (Safety test of Ministry of
Health, Labour and Welfare) is necessary in
IP 44
combination with the inverter. Refer to page 498 for
further information.
Inverter has an electronic thermal relay dedicated to
Mitsubishi constant motor, therefore external thermal relay
is not necessary.
220V
200V
60 100
494
SELECTION
Remarks
60Hz torque reference
(when inverter is 37kW to 55kW)
Maximum torque for short time
150
130
Continuous
operation
torque(37kW)
100
92
80
Continuous
operation
torque
(45kW to 55kW)
0
0.3 3 10 60 65
Output frequency (Hz)