The DC Tech Series has been discontinued and is no longer available, please contact a service representative to discuss best options.
We are proud however to suggest some of our other items (Adobe Acrobat Format 444K) as a replacement. Please feel free to give our expert staff a call at any time. Putting our expertise to work for you, finding the right solution is just a phone call away.
Power Supply Model | IS-120A | IS-444B | ISA-500A | IS-471B |
---|---|---|---|---|
Power Source: | 3 phase 480VAC / 440 VAC / 20VAC +10% -15% 50/60 Hz | |||
Output Frequency: | 1 kHz / 800 Hz / 600 Hz (selectable) | |||
Output Voltage: | Single Phase 650V, Peak at 480V input | |||
Rated Capacity: | 52 kVA at 480 VAC | 182 kVA at 480 VAC | 325 kVA at 480 VAC | |
Maximum Primary Output Current: | 200 A (8% duty cycle) | 500 A (15% duty cycle) | 1000A (12% duty cycle) | |
Control Systems: | Secondary Constant Current | Secondary Constant Current | ||
Secondary Constant Power | Secondary Constant Power | |||
Primary Constant Current (RMS) | Primary Constant Current (RMS) | |||
Primary Constant Current (Peak) | Primary Constant Current (Peak) | |||
Fixed Pulse | Fixed Pulse | |||
Secondary Constant Voltage | ||||
Control Modes: | N/A | Forging, Chaining, Successive | N/A | |
Weld Schedules: | 15 schedules | |||
Timer Settings: | ms Mode | ms Mode | Cycle Mode | |
Squeeze Delay | 0000-9999 ms | 0000-9999 ms | 000-999 cycles | |
Squeeze | 0000-9999 ms | 0000-9999 ms | 000-999 cycles | |
Weld 1 | 000-600 ms | 000-600 ms | 00-30 cycles | |
Upslope | 000-400 ms | 000-400 ms | 00-20 cycles | |
Cool | 000-999 ms | 000-999 ms | 00-99 cycles | |
Weld 2 | 000-600 ms | 000-600 ms | 00-30 cycles | |
Downslope | 000-400 ms | 000-400 ms | 00-20 cycles | |
Hold | 000-999 ms | 000-999 ms | 00-99 cycles | |
Off | 0000-9999 ms | 0000-9999 ms | 00-99 cycles | |
Pulses | 1-9 and Cycle Mode (see right) | 1-9 | 1-9 | |
Maximum Secondary Current Settings: | 0.1 -- 20.0 kA | 2.0 -- 40.0 kA | 4.0 -- 80.0 kA | |
Weld Monitors: | ||||
Current | 00.0-20.0 kA | 00.0-40.0 kA | 00.0-80.0 kA | |
Voltage | 00.0-9.99 V | 00.0-9.99 V | 00.0-9.99 V | |
Power | 00.0-20.0 kW | 00.0-40.0 kW | 00.0-80.0 kW | |
Pulse Width | 10%-100% | 10%-100% | 10%-100% | |
Program Unit: | MA-627A (sold separately) | |||
Monitor Unit: | MA-628A (sold separately) | |||
Dimensions (H x W x D): | 11 x 7 x 25 inches (686 x 483 x 1600 mm) | 27 x 12 x 20 inches (1702 x 762 x 1295 mm) | 27 x 12 x 26 inches (1702 x 762 x1664 mm) |
|
Weight: | 33 lbs. (15 kg) | 99 lbs. (45 kg) | 139 lbs. (63 kg) |
Power Supply Model | IS-433B | IS-470B |
---|---|---|
Power Source: | 3 phase 480 VAC / 440 VAC / 220 VAC +10% -15% 50/60 Hz | |
Output Frequency: | 1 kHz / 800 Hz / 600 Hz (selectable) | |
Output Voltage: | Single Phase 650V, Peak at 480V input | |
Rated Capacity: | 182 kVA at 480 VAC | 325 kVA at 480 VAC |
Maximum Primary Output Current: | 500 A (15% duty cycle) | 1000 A (12% duty cycle) |
Control Systems: | Primary Constant Current | |
(PWM RMS Value) | ||
Primary Constant Current | ||
(PWM Effective Peak) | ||
Fixed Pulse | ||
Control Modes: | N/A | |
Weld Schedules: | 7 schedules | |
Timer Settings: | ms Mode | |
Squeeze Delay | n/a | |
Squeeze | 0000-9999 ms | |
Delay | 000-999 ms | |
Weld 1 | 000-600 ms | |
Upslope | 000-400 ms (included in Weld 1) | |
Cool | 000-999 ms | |
Weld 2 | n/a | |
Downslope | n/a | |
Hold | 000-999 ms | |
Off | n/a | |
Pulses | 1-9 | |
Maximum Secondary Current Settings: | 1.0 - 20.0 kA | 2.0 - 40.0 kA |
Weld Monitors: | ||
Current | 00.0-20 kA | 00.0-40 kA |
Pulse Width | 10%-100% | 10%-100% |
Program Unit: | MA-627A (sold separately) | |
Monitor Unit: | N/A | |
Dimensions (H x W x D): | 27 x 12 x 20 inches (1702 x 762 x 1295 mm) | 27 x 12 x 26 inches (1702 x 762 x 1664 mm) |
Weight: | 99 lbs (45 kg) | 139 lbs. (63 kg) |
Transformer Model | IT-40 | IT-85 | IT-130 | IT-250 |
---|---|---|---|---|
Rated Capacity: | 40 kVA at 50% | 85 kVA at 50% | 130 kVA at 50% | 250 kVA at 50% |
Maximum Input Voltage: | 650 V | 650 V | 650 V | 650 V |
Input Frequency: | 1000 Hz | 1000 Hz | 1000 Hz | 1000 Hz |
Unloaded Secondary Voltage/Turns Ratio: | 4.28 V (152:1) | 8.9 V (73:1) | 13.0 V (50:1) | 13.0 V (50:1) |
8.55 V (76:1) | 9.5 V (68:1) | 13.8 V (41:1) | ||
Cooling Water: | 1 gal/min | 2 gal/min | 4 gal/min | 4 gal/min |
Dimensions (H x W x D): | 6.75 x 5.0 x 14.85 in (432 x 330 x 965 mm) | 6.75 x 6 x 11.9 in (432 x 381 x 762 mm) | 10.26 x 6 x 15.5 in (660 x 381 x 991 mm) | 10.25 x 7.75 x 19 in (660 x 483 x 1219 mm) |
Weight: | 60 lbs. (27 kg) | 60 lbs. (27 kg) | 110 lbs. (50 kg) | 130 lbs. (59 kg) |
Courtesy of Miyachi
With quality and production demands increasing, DC inverter resistance welding offers benefits that traditional AC welding cannot address. In the broadest sense, inverter welding offers more flexibility than conventional AC welding. Virtually any application that can be done with an AC weld control can be done with inverter technology.
Many resistance weld failures can be traced to inconsistent secondary welding current. Adaptive feedback systems used in inverter technology utilize pulse width modulation to continuously monitor and adjust the weld current throughout the weld, compensating for non-uniform workpiece resistance, worn electrodes, and power source fluctuations, resulting in extremely consistent weld current delivery throughout every weld. The benefits derived include shorter weld times, lower currents and forces, faster speed and throughput, longer electrode life, less weld splash, and less surface deformation of the part.
In resistance welding, a weld joint (or nugget) is formed as weld current flows through the workpieces, encountering different electrical resistanaces and generating heat. AC controls, by definition, cycle weld current on and off twice per cycle. The AC “cycling” can cause embrittlement and irregular nugget formation, hurting weld quality and strength. By contrast, inverter systems deliver current without cycling, thus continuously heating the weldments. Weld times can be adjusted in one millisecond increments. This precise control allows inverter welders to utilize shorter weld times and control how current can be introduced into the parts by “shaping” the current weldform. Lower weld current and less force (compared to AC weld controls) and be utilized to achieve the desired molten state of the weldments for optimal nugget formation.
Inverters are capable of successfully welding a broad range of materials. Softer metals, particularly those with high electrical and thermal conductivity are good candidates for inverter resistance welding. Higher electrical conductivity means that higher weld currents must be used. High thermal conductivity requires that the weld current must be delivered quickly to minimize the heat affected zone. Zinc coated galvanized steels also fall into this category.
Compact inverter equipment features small, lightweight welding transformers for use in manual, automated, and robotic (transgun) configurations. In AC resistance welding, higher current outputs generally require extremely large transformers. The physical size and weight of the AC welding transformer is especially critical in transgun configurations, often limiting the current output available. Inverter transformers are often as much as 50% smaller, lighter, and deliver higher current outputs than conventional AC transguns.
Inverter performance benefits can result in higher production rates with less time lost to electrode maintenance and changes. According to many manufacturers, weld failures, part rejects, and costly re-works have been dramatically reduced. Shorter weld times, lower weld currents, and balanced line loads, lessen the primary current demand – reducing electrical usage and expense. Adaptive feedback control modes and millisecond programming make precise control over the resistance welding process a reality. DC inverter welding allows for a broader process window to overcome workpiece variances and production changes. This larger process window is one of the primary reasons that inverter welding meets today’s demand for higher quality and delivers such an attractive return on investment.
DC inverter power supplies offer large benefits in some resistance welding applications. Offered in capacities of up to 325 kVA, dc inverter technology is able to deliver superior weld quality by using lower weld currents, shorter weld times, and lower weld forces than conventional AC controls. Through the use of a high speed control monitoring multiple weld functions using adaptive feedback, the user is able to regulate the welding process.
Superior control over current and heat generation results in a reduction in energy use and increase in electrode life, as well as improved weld quality, increased production efficiency, and reduced cost.
A closed loop feedback system means that the control receives input as to how this particular weld is progressing and adjusts to maintain the weld at the entered specification. The control is able to maintain either weld current or power (user selected) by measuring and adjusting the secondary current and voltage. The control gets new feedback every 500 microseconds, consistent weld current (or power) at the electrodes is maintained, overcoming power fluctuations and workpiece material variances that hurt weld quality.
For more information, or help selecting or pricing a DC Inverter system, feel free to contact T. J. Snow. We will be glad to help in any way we can.
Used to store weld schedules and program multiple units.
Adds process security by displaying Current, Power, time and error data while inhibiting access to programming functions.
Model | IT-40 | IT-85 | IT-130 | IT-250 |
---|---|---|---|---|
IS-120A (Spot) | XX | XX | ||
IS-444B (Spot) | XX | XX | ||
ISA-500A (Spot) | XX | |||
IS-471B (Spot) | XX | XX | ||
IS-443B (Seam) | XX | XX | ||
IS-470B (Seam) | XX | XX |