Technical documentation example

Here we present a redesign of a 4-pole 5.5kW motor 4A112M4. We have recalculated this motor with our design tools and then redesigned components of this motor in order to provide a sample of technical documentation.

Technical documentation example for 4A112M4

Recalculation of an induction motor 4A112M4

Technical data for 4A112M4

Value	Catalogue data and measurements	Our design software
Nominal useful power [kW]	5.5	5.5
Synchronous speed [rpm]	1500	1500
Number of poles	4	4
Nominal line voltage [V]	380	380
Frequency [Hz]	50	50
Number of phases	3	3
Connection of phases	Y	Y
Nominal torque [Nm]	36.322	36.309
Phase resistance at 20°C [Ohm]	0.995	0.987
Rotation speed at nominal load [rpm]	1446	1446.5
Nominal slip [%]	3.6	3.57
Nominal current [A]	11.498	11.016
Efficiency at 50% of load [%]	86.5	84.9
Efficiency at 75% of load [%]	86.5	85.7
Efficiency at 100% of load [%]	85.5	84.8
Power factor	0.85	0.85
Ratio of starting torque to nominal [r.u.]	2	2.009
Ratio of maximum torque to nominal [r.u.]	2.2	2.356
Ratio of starting current to nominal [r.u.]	7	6.07
Critical slip [r.u.]	25	20.2
No load current [A]		3.956
Flux density in air gap [T]	0.85	0.842
Losses in stator winding [W]		497.338
Losses in rotor cage [W]		208.893
Losses in steel [W]		191.402
Mechanical losses [W]		29.221
Additional losses at load [W]		32.307
Total losses [W]	932.749	958.161
Av. t° of stator winding at ambient t°= 40°C, °C	113.5	113

Click on images below in order to see a corresponding drawing

Standard components for 4A112M4

BOM for 4A112M4

Operation mode of 4A112M4

Technical documentation example for 4A132M6

Recalculation of an induction motor 4A132M6

Technical data for 4A132M6

Value	Catalogue data and measurements	Our design software
Nominal useful power [kW]	7.5	7.5
Synchronous speed [rpm]	1000	1000
Number of poles	6	6
Nominal line voltage [V]	380	380
Frequency [Hz]	50	50
Number of phases	3	3
Connection of phases	Y	Y
Nominal torque [Nm]	73.987	73.951
Phase resistance at 20°C [Ohm]	0.646	0.645
Rotation speed at nominal load [rpm]	968	968.5
Nominal slip [%]	3.2	3.15
Nominal current [A]	16.454	15.737
Efficiency at 50% of load [%]	84	83.2
Efficiency at 75% of load [%]	85	84.9
Efficiency at 100% of load [%]	85.5	84.7
Power factor	0.81	0.805
Ratio of starting torque to nominal [r.u.]	2	2.206
Ratio of maximum torque to nominal [r.u.]	2.5	2.8
Ratio of starting current to nominal [r.u.]	6	6.106
Critical slip [r.u.]	26	22.8
No load current [A]		7.499
Flux density in air gap [T]	0.87	0.872
Losses in stator winding [W]		611.545
Losses in rotor cage [W]		251.509
Losses in steel [W]		313.868
Mechanical losses [W]		29.933
Additional losses at load [W]		43.732
Total losses [W]	1271.93	1250.587
Av. t° of stator winding at ambient t°= 40°C, °C	105	111.4
Av. t° of housing at ambient t°= 40°C, °C	77	75.1