Reliability, quality and
construction of the PHASE-A-MATIC™
Rotary Phase Converter:
rotary portion of our converter is proprietary, custom built to our
specifications by Baldor Electric, one of the largest and most
trusted motor manufacturers in the world, with warranty stations
nationwide and worldwide. It is a true phase converter and not a
modified electric motor as most of our competitors use. Many
years of testing, changing and developing the converter in
conjunction with Baldor’s engineers has produced a very simple
and trouble-free converter with extremely low idle current and low
noise level. Many of our customers confirm that our rotary
converters are the quietest and most trouble-free available.
of design; uses all soldered connections
the design exceptionally simple reduces the risk of electrical
connection failure to almost zero since these are some of the most
common causes of failure.
We use only soldered connections with no mechanical
electrical connections like spade clips, terminals or screws which
can vibrate loose or corrode over time. There are no start
capacitors, relays or contactors with connections which can come
loose or arc and weld the contacts causing failure of the
contactor and the start capacitors, and perhaps even the rotary
converter or your equipment. Because of this we do not have
circuit board failures caused by spikes generated by the magnetic
contactors as some of our competitors do.
failure rate is practically zero because the rotors are
specifically designed and manufactured for rotary converter use.
However, some of our competitors emphasize that rotors often fail.
This is because they machine standard electric motors, modifying
and thereby weakening standard electric motor rotors, which were
not originally designed to be used as a phase converter.
converter is performance tested before shipment and assigned a
serial number. These records are kept for review if any questions
should ever arise about the performance specifications.
The most likely warranty repair would be bearings or windings,
which are very rare. This type of failure is much less than 1%,
and if it is going to happen at all, most likely would occur
within the first 12 months. Failures after that are extremely
See MTBF below.
(Mean Time Between Failure)
rate (MTBF) is so low it's almost impossible to determine. We find
that within the first 12 months approximately 1 in 150 might
have a problem, and usually within a few weeks or months. After
the first 12 months, it might be one or less in 5,000 over a 30
year period. We continue to hear of our Rotary Converters that
have been in service for 25 or 30 years, and which are still
working flawlessly. It could go on to do another 25 or 30 years.
There is very little to go wrong with the Rotary Converter.
Phase-A-Matic, Inc. 1-800-962-6976 for warranty repair stations in your area.
metalworking and woodworking equipment,
farm/agricultural equipment, pumps, compressors, refrigeration, elevators, printing machines,
rectifiers, lasers, radar, EDM machines, MRI, tanning booths, transmitters,
welders, conveyors, hydraulic pumps, flywheels, ovens, dough
mixers, laundry machines, and virtually every type of 3-phase
machine, including CNC/PLC equipment, when used with the PHASE-A-MATIC™
Refer to Application
Notes - additionally available in PDF form as
Help is also available through the Sizing
page. Just fill out the appropriate form and submit it to us. A
qualified technician from Phase-A-Matic, Inc. will contact you.
For long heavy starting loads, instant reversing or momentarily overloaded motors (laundry extractors, paper cutters, air conditioners, hoists, lathes, Taiwanese, Chinese & foreign motors, design
"E" motors, etc.) contact factory and/or refer to SIZING HELPS above.
Multiple motor applications: Due to the high in-rush current required
to start a motor, which can be as much as 5 to 10 times the normal
running current, most applications require sizing the horsepower (HP) of the Rotary Converter 50% larger, OR MORE than the HP of the largest motor, or any combination of motors started at exactly the same time. The first motor started, IF NOT RUNNING HEAVILY LOADED, generates additional 3-phase power back into the circuit. You can then run additional motors (not heavily loaded and not all started at the same time). A maximum of up to 3 times the HP rating of the Rotary Converter can run at the same time, if not heavily loaded, and not started simultaneously. For example, a 3 horsepower
converter could run motors totaling up to 9 horsepower under the specific conditions described here. See Installation.