Torque & HP Rating from gas & electric motors...
- Thread starter Jeremy
- Start date
The Cleaning Artist
Member
- Joined
- Oct 7, 2006
- Messages
- 475
5 hp is 5 hp
The torque is what is different
An electric motor runs at peak power continuous. The more load the more amps.
A gas motor can operate with variable power levels. IE 1000 rpm or 2000 rpm ect
If your looking at what hp does it take to spin a blower then you need to look at the engine rating at the rpm in which you intend to use it.
The torque is what is different
An electric motor runs at peak power continuous. The more load the more amps.
A gas motor can operate with variable power levels. IE 1000 rpm or 2000 rpm ect
If your looking at what hp does it take to spin a blower then you need to look at the engine rating at the rpm in which you intend to use it.
Larry Cobb
Member
Jeremy;
The difference in HP is due to the rating system.
A 5 HP electric motor is designed to run @ the 5 HP power level.
A gasoline 5 HP engine will deliver 5 HP for short-term usage. For continuous power, most manufacturers would rate it @ 75-80+% of that maximum HP.
This % has increased in the last few years as engineering has improved on the gasoline engines.
With our most popular TM engine, the water-cooled 31 HP Kohler, the maximum continuous output is 26 HP or 84% of the rated HP.
The #4MP blower on that model requires 16.7 HP at maximum rated output. The pump adds another 1-2 HP.
Total HP required is about 70% of that available continuously.
Larry Cobb
Engineering over SOA Standards
The difference in HP is due to the rating system.
A 5 HP electric motor is designed to run @ the 5 HP power level.
A gasoline 5 HP engine will deliver 5 HP for short-term usage. For continuous power, most manufacturers would rate it @ 75-80+% of that maximum HP.
This % has increased in the last few years as engineering has improved on the gasoline engines.
With our most popular TM engine, the water-cooled 31 HP Kohler, the maximum continuous output is 26 HP or 84% of the rated HP.
The #4MP blower on that model requires 16.7 HP at maximum rated output. The pump adds another 1-2 HP.
Total HP required is about 70% of that available continuously.
Larry Cobb
Engineering over SOA Standards
MerCrewser
Member
- Joined
- Jan 23, 2007
- Messages
- 304
HP is RPM x Torque divided by 5252. Engines make a maximum torque at a certain RPM, thus Max HP at a certain RPM. Electric motors can make maximum torque at 0 RPM.
