Mike Dolt Enterprises
Mike Dolt Enterprises
User: nizak, Location: Massachusetts
Asked on: Tuesday, March 22, 2011 at 1:09 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:06 am EDT
Question: My dad has a hydraulic wood splitter that he would like to operate inside his pole barn. It is currently set up with a 5hp 4 cycle gas engine and a 2 stage hydraulic pump. Would anyone here know what size electric motor would be required to give the same performance as the gas engine? I'm not 100% certain but i believe the rpm of the gas engine is around 3600, aren't most electric motors 1750? Shaft size, coupling, and mounting are not a concern just would like to know if something like this would be possible to do. Power source would be 240V AC single phase. Thanks.
Yes, it is possible to use an electric motor to power your hydraulic wood splitter.
Electric Motor Power and RPM Considerations
Power
A 5hp gas engine typically delivers around 3.7kW of power. To convert this to an electric motor, you will need to consider the motor's efficiency. Assuming an efficiency of 80%, you would need an electric motor with a power rating of around 4.6kW (or 6.2hp).
RPM
While most electric motors commonly operate at 1750 RPM, variable frequency drives (VFDs) can be used to adjust the motor's speed. You can use a VFD to match the speed of your existing 2-stage hydraulic pump, which operates at 3600 RPM. This will provide the same performance as the gas engine.
Suitable Electric Motor
Based on the above calculations and the availability of 240V AC single-phase power, a suitable electric motor for your application would be:
3-phase electric motor
5.5kW (7.5hp), 380V, 1750 RPM
VFD
5.5kW, 380V input, 380V output, rated for 1750-3600 RPM
Additional Considerations
Voltage
The motor voltage (380V) may require a transformer to step up the voltage from 240V.
Mounting
You may need to modify the mounting system to accommodate the electric motor and VFD.*
Safety: Ensure proper electrical wiring and grounding to prevent electrical hazards.By using an electric motor, you can eliminate the emissions and noise associated with the gas engine. Additionally, electric motors are generally more efficient and require less maintenance. Flag for review