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The exceptional performance of Lincoln Motors on inverter power results from their mechanical designs, use of
quality electrical and insulation materials and appropriate manufacturing processes. Lincoln Electric has developed a motor
insulation system test to determine the voltage level at which corona inception occurs. To prevent corona inception, Lincoln Motor
uses a better design, better materials, and better manufacturing methods. But how can we prove that we have tamed corona? We
devised and published the industry's first method to determine Corona Inception Voltage (CIV) on assembled motors, not just
laboratory testing on twisted pairs of magnet wires. The result? We can confirm that our design raises the Lincoln motor's CIV
above the worst voltage spike levels created by today's IGBT adjustable speed drives. And, no corona means no insulation failures
and longer motor life. Lincoln Electric has motors for nearly any industrial application. And, with over 1700 distributor
locations in the U.S. and Canada to serve our customers.
Lincoln inverter-duty motors deliver long life without performance or installation compromises. You can employ
any make or model VFD Drive. You can ignore all restrictions on cable length between drive and motor. (Other motor makers suggest
short lengths to limit voltage build-up as voltage waves reflect back and forth along the line.) And, you can forget having to
worry about costly power conditioning add-ons like filters or reactors. You just won't need them. Our precedent-setting five-year
warranty distinguishes Lincoln Motors from claims you may hear from other companies. They claim to make a good motor. We know
Lincoln Electric makes a better motor. Turn-to-turn, phase-to-phase, or phase-toground failures are covered. No other major
electric motor manufacturer has expressed as much confidence in the design, manufacturing quality or performance of its motors.
When you select a Lincoln Motor, you are getting the best inverter-duty motor, guaranteed.
Most Lincoln motors are in-slot wound. Why? In a motor winding which has been random wound or coil-inserted,
there is a likelihood that the beginning turns and ending turns of a coil could be in close proximity to each other. Because of the
uneven voltage distribution in the coil caused by the high voltage transients, this close proximity can serve as a point where
voltage potential is very high between adjacent turns. This situation often results in an area where corona degradation begins.
However, if the turns of a coil are placed in the stator slot sequentially (as in a form wound or in-slot wound stator), there is
substantially decreased probability that beginning and ending turns could be close to one another within the winding.
Lincoln Motors are designed to run cool. Why? Operating temperature has a definite effect on the Corona
Inception Voltage (CIV) of an insulation system. It has been shown that the CIV of a twisted pair at 155C (maximum stabilized
temperature of a motor constructed with class F insulation) is substantially lower than the CIV of the same twisted pair at room
temperature. Therefore, a cool running Lincoln Motor is desirable over one that operates at a high temperature. Lincoln motors are
multiple-dipped in a Class H, solventbased varnish. Why? Another process which affects the CIV of a motor is the varnishing of the
stator. Motor varnish is used for various reasons, but one of its primary purposes is to increase the dielectric withstand
capability of the insulation system. Essentially, greater varnish build (through multiple dips in a dip and bake system) within a
winding gives the winding a higher CIV, resulting in greater resistance to high voltage transients.
Lincoln Electric uses the latest spike-resistant wire. Why? The advanced technology magnet wires introduced in
the motor industry a few years ago promise an improved ability to endure the high voltage pulses experienced with IGBT wave forms.
However, the new wire does nothing to eliminate fast voltage rise times (overshoot) and voltage reflections caused by the inverter
drive. Better wire helps extend the life of the Lincoln Motor's insulation system, but when employed as the sole spike defense
(typical of some other motor manufacturers), it just postpones the inevitable catastrophic motor failure. The full benefit of
special magnet wire is realized only when it is utilized as an integral part of a total system approach to stop insulation damage.
Lincoln minimizes the potential for magnet wire insulation damage during manufacture by dispensing wire from its original
packaging directly into the stator slot. Why? In general, the basic quality of manufacturing processes contributes to the CIV of
a motor. If magnet wire is damaged (even slightly) at any stage of construction, the damaged area could likely become a corona
inception point in future motor operation. In many cases, these small nicks are not detectable by a surge test process, and will
not be discovered until after motor failure has occurred. For this reason, exceptional care is taken by Lincoln Electric in the
construction of inverter-duty motors.
Every Lincoln Inverter-Duty motor has a built-in Class F thermostat as standard. This device, when properly
connected, protects the Lincoln Motor from overload or over temperature failure providing peace of mind in demanding
applications. Each Lincoln Electric Motor is surge tested twice and ground tested three times during manufacture, using more
severe parameters than normal. For example, all 460 V motors are surge tested to 4500 V, rather than NEMA's requirement of
2300 V, and they are ground tested to 3400 V rather than 2300 V. Lincoln is proud to design and manufacture all its
Inverter-Duty motors in America. Our new facility in Cleveland, Ohio provides you with fast turnaround, excellent workmanship,
uncompromising quality, and the flexibility to build modified or special motor designs.
Our Lincoln Motor distributors warehouse in Boise, Idaho stocks some Lincoln products enabling us to further
assist you in finding the correct Lincoln Electric Motor for your application in the USA , Canada and Mexico. Whether we have
Lincoln Motors in stock in Boise, Idaho or need to ship direct from LEESON Electric to any USA cities; Clearwater Tech can get
Lincoln Motors to you fast and save you money! It will be very helpful if you have the Lincoln Motor part numbers ready, then our
sales representatives can provide you with a pricing and availability quote for Lincoln Electric Motor that you are looking for in
seconds. If you do not have the part numbers for Lincoln Motors, our application engineers will be able to help you figure out the
part numbers and get the price quote to you as soon as possible.
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