How large of an engine, or motor, do I need to drive a ZENA welding system?
If you will be using a 4 cycle GASOLINE engine -- using pulleys and a V or SerpentineBelt to drive the power generator (a common configuration for stand alone welders), an:
If you will be using a 4 cycle water cooled DIESEL engine -- using pulleys and a V or SerpentineBelt to drive the power generator (also a very common configuration for stand alone welders), a:
NOTE: Add 2 hp for air cooled diesels
If you plan to use a special design HIGH SPEED ENGINE (typicality a 2 cycle gas, diesel, or turbine) to directly drive the power generator:
If you will be using an ELECTRIC MOTOR -- using pulleys and a V or SerpentineBelt to drive the power generator, a:
Note: It's possible to use two 5 hp 3450 rpm motors (typically, with each on it's own, separate electrical circuit) -- belted together to drive a 150 Amp welding system.
A couple of examples:
NOTE: In some cases, when using single cylinder internal combustion engines, we find that extra horsepower is required to insure proper operation due to inadequate engine flywheel mass. Generally, our customers report that 14-20 HP single cylinder gasoline engines (which are usually factory equipped with electric start and with built-in alternators) of the type often found on riding mowers generally make good welder drive engines. Kohler and Onan engines reportedly do particularly well, since they are frequently factory equipped with heavier flywheels. And, we have had many customers report that Honda's electric start 11 HP (and larger) engines make very good power sources for 150A welders.
Twin cylinder gas engines ranging from 16 to 20 HP have been used successfully drive 150A power generators without needing modification to the stock flywheel configuration.
Small, 6+ HP diesel engines also make excellent power sources for 150A welders.
More information -- application notes:
Feel free to call (or e-Mail) us for specific information and/or recommendations -- or, if you have questions about a specific application that you have in mind.
1 -- small four cycle engines:
Remember, when working with lower hp 4 cycle engines, flywheel mass must always be great enough to insure smooth operation under maximum load.
2 -- riding mowers:
Customers report that there are many very inexpensive used riding mowers on the market which have worn out mowing equipment, but which have perfectly good engines -- and often good transmissions as well.
They also tell us that a "riding welder" is an extraordinarily useful configuration. We agree, and often use this type of welder for marketing presentations and trade show expositions -- as well as for general maintenance work.
We do not have formal plans for this type of installation. However, we do have pictures and descriptions of such installations on our web site:
Links to photos and notes on a few typical small engine retrofits:
pictures of a 150A riding welder
pictures of a free standing 150A engine driven welder made using parts from an old 11 HP riding mower
pictures of a worn out engine driven welder retrofitted/repaired with a 200A ZENA welder
ZENA™ is a trademark owned by ZENA, Inc. for its welding systems and related products.
US & Foreign Patents Pending
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