How much HP for this DC motor???

[bherr]

I've got a BP series II Interact 4 with a Thrige-Titan Electric motor on the spindle. motor plate is as follows:
type GF112M10BR9 Nr. 112/974
Speed 366 , 1140 , 6000 min.
Arm. 172, 400, 400 v
P 2.98, 8.8, 8.8 Kw
Ed/Rating 100
Field 270, 270v
field 1.25, 1.25 A
IP 23
IC 05
IM 2031
Bauj -19 85

Can anyone tell me the HP rating of this motor?????

Ben

[bunalmis]

736 watt = 1 HP

2.98 *1000/736 = 4HP

8.8 * 1000/736 = 12HP

[bherr]

bunalmis,

The P section had 2.98 and then a block next to it had the 8.8 and the another block with 8.8 KW listed. So are you saying that this is a 12HP motor??

Ben

[Al_The_Man]

I always thought it was 746w.
But if the armature is 400v and it is 8,8kw then that is about 22amps, which jives with the IP23 shown (11~12HP).
Al.

[NC Cams]

745.7 watts per HP is the exact conversion factor.

Due to conversion losses, what the motor draws won't be what it will put out as rated power but it is close enough for estimation purposes.

[bunalmis]

Originally Posted by NC Cams 745.7 watts per HP is the exact conversion factor. Due to conversion losses, what the motor draws won't be what it will put out as rated power but it is close enough for estimation purposes.

You don't need conversion loss. Because written power on motor label is a mechanical power, this is not electrical power.

[NC Cams]

The need or lack of need to consider conversion losses depends on whether you use 736 or 745.7 as the watts-to-hp conversion factor.

As I recall, the thermodynamic conversion factor for watts to HP is 745.7. HOWEVER, when you get involved with electrical conversion as in electric motor theory, things like inductance, capacitance and resistance affect the ability of the motor to covert electric power into mechanical energy.

Those much more well versed than I in the subject of motor theory can interject here but, BUT, I know for a fact that motors do not provide a 1:1 conversion of electric power into mechanical energy. I don't know what "rating games" are or may be played with electric motors but, surely, rated powers are not necessarily going to be 100% demonstrative of exact performance potential of a motor - especially when power factors come into play.