DC Inverter power supplies have become popular due to their abilityto precisely join small materials. Some users hesitate to purchase DC invertersbecause they require expensive specialized transformers with built-in rectifiers.Now Miyachi has developed an AC inverter power supply that has all of theadvantages of a DC inverter, but can be used with a conventional AC transformer.This new power supply is the MIB-200A.
The AC inverter heats more efficiently
Phase control systems with SCR's like conventional AC welders haveoff-time during the weld cycle. The MIB-200A has no off time so weld timescan be shortened, resulting in less heat-affected area, and more attractivewelds.
| Existing equipment does not have to bereplaced Since the MIB-200A uses a conventional AC transformer, existing transformersor heads do not need to be replaced. Only the power supply has to be changed.Cost and time for retrofit is minimized. Excellent for fusing applications Output frequency is variable |  |
ADVANTAGES OF THE AC INVERTERPOWER SUPPLY
#1 The AC inverterhas greater heat efficiency than single-phase AC welders so better qualitywelds with less splash are achieved.
| Picture 1 shows a conventional single phase AC output. Current leveldrops to zero at every half cycle. Also, there is cool time, (t2 and t4)for phase control. The MIB-200A AC inverter has no cool time for phase control or zerolevel, so weld current is supplied continuously. Picture 2 shows the intermittenttemperature output of a conventional AC welder. The conventional AC weldhas a higher peak current which causes weld splash. The AC inverter increasestemperature linearly and supplies stable welding heat without creatingpeaks. For this reason, better heat efficiency, less splash and greaterweld quality are possible. |  |
#2 The AC inverterreduces electrode wear
| Picture 3 shows an application of a battery tab weld. Using a DC inverter,current flows in only one direction as shown in picture 3-1. Due to thedirectional current flow, heat distribution to the electrodes is uneven.One electrode wears faster than the other. Using the AC inverter, weldcurrent flows through both electrodes alternately as shown in picture 3-2,thus heat is generated equally. Using the MIB-200A, asymmetrical electrodewear can be avoided and greater weld quality can be obtained even in serieswelds. |  |
#3 The MIB-200A, ACinverter reduces insulation burning in fusing applications.
| The MIB-200A, AC Inverter wave form, picture 2, allows the user toprecisely control the heat into the fusing material. This improved processcontrol can lead to a reduction in the total amount of heat required tofuse, reducing or eliminating discoloration of the commutator and excessiveburning of the insulation typically associated with too much heat. |  Motor Armature Fusing |
How the unit fits into a microweldingtotal system:
| This optional remote control boxis used to store weld schedules and program multiple units. Programing Functions:
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SPECIFICATIONS
CURRENT SETTING RANGE 0.10~9.99kA
CURRENT MONITOR (current high/low) 0.00~9.99kA 15 schedules (Monitoris turned off, if set to 00.0kA)
VOLTAGE MONITOR (voltage high/low) 0.00~9.99V 15 schedules (Monitoris turned off, if set to 00.0V)
COOLING SYSTEM Forced Air Cooling
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DIMENSIONS
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For more information, or help selecting or pricing a controlssystem, feel free to contact T.J. Snow. You might also be interested in:
WeldChecker Chart | OtherMiyachi Products and Accessories
WeldingSupplies | Return to T. J. Snow
| Contact Information: | 120 Nowlin Ln P. O. Box 22847 Chattanooga,TN 37422 | (423)894-6234 1-800-NOW-SNOW FAX (423) 892-3889 ORDER FAX (423)490-2417 |
 | welders@tjsnow.com |
