We design and supply different type of resistance welding controller.It is offen used to control medium frequency transformer.As the graphs imply, our MFDC welding controller can output current in DC. Therefore, in using our welding controller, your welding process can be easier to control, your welding can be quicker, and your welding process can be more stable. The frequency of weld controller is 1 kHz, so with a 50 Hz power source, the electric current adjustment process is faster and more accurate. So just as these graphs show, our mid-frequency welding controller can control the electric output stably.
With regards to the general welding control, our middle frequency resistance welding control power supply is more advantageous in the following areas:
- The secondary welding circuit flow is in DC current. Therefore, due to this close connection for your weld project, the different degrees of depth produces the induction reactance of the secondary circuit that will allow your electric current weld to be more stable and its fluctuation greatly reduced.
- The weight of your required transformer can be greatly reduced.
- Your electrode life can be longer.
- Includes the ability to weld aluminum and zinc plated metal materials, etc., and its weld result is good.
- Is especially well suited for welding three-layered sheet metal, extremely thin materials, and very precise welds as required.
- Creates fewer projectiles.
- With our machine controls its electric current, the resulting quality of your spot weld will be improves greatly.
MFDC Welding Controller Main features:
- Power source output frequency: 1 kHz, with accuracy to the millisecond.
- Can program up to 64 welding schedules(for SMF1 series).SMF3 series is a economy inverter,has 15-32 welding schedules.SMF2 series has 256 weld schedules.
- SMF2 series inverter controller has adaptive control function.
- Three section heating process: preheat, weld, and reheat; during the welding section process it is possible to set the welding control to increase heat gradually or decrease heat gradually.
- Has the capacity to program pressure controls, and can define at most 10 pressure sections.
- Has the capacity to program I/O output.
MFDC Welding Controller Model Table(SMF3 series):
| Controller Model | SMF3-400 | SMF3-600 | SMF3-800 | SMF3-1200 | SMF3-1600 | SMF3-2400 |
|---|---|---|---|---|---|---|
| Power Supply | AC 380V-480V | AC 380V-480V | AC 380V-480V | AC 380V-480V | AC 380V-480V | AC 380V-480V |
| Output Power | PWM 500V | PWM 500V | PWM 500V | PWM 500V | PWM 500V | PWM 500V |
| Output Frequency | 1000HZ | 1000HZ | 1000HZ | 1000HZ | 1000HZ | 1000HZ |
| Duty Rate | 10% | 10% | 10% | 10% | 10% | 10% |
| Max.Output Current | 400A | 600A | 800A | 1200A | 1600A | 2400A |
| Input Wire Area | 16mm2 | 16mm2 | 35mm2 | 50mm2 | 75mm2 | 75mm2*2 |
| Output Wire Area | 25mm2 | 25mm2 | 50mm2 | 75mm2 | 95mm2 | 95mm2*2 |
| Cooling Water | ≥4L/min | ≥4L/min | ≥10L/min | ≥12L/min | ≥16L/min | ≥18L/min |
| Weld Schedule No. | 15-32 | 15-32 | 15-32 | 15-32 | 15-32 | 15-32 |
| Secondary Feedback | No | No | No | No | No | No |
| Networking | RS485 | RS485 | RS485 | RS485 | RS485 | RS485 |
| Valve Output | DC24V | DC24V | DC24V | DC24V | DC24V | DC24V |
| — | — | — | — | — | — | — |
Note1:SMF3 series welding controller also have below functions:Programmable output, fault alarm to interrupt welding, current monitoring, water pressure detection, transformer temperature detection, emergency stop control, welding spot count, production number monitoring, current step increase, electrode dressing and other functions.
Note2:SMF3 series controller has 15 weld schedule on ordinary spot welding mode.SMF3 has 32 weld schedule on robotic welding mode.
SMF1 series and SMF2 series,SMF3 series Medium Frequency Inverter Controller Difference:
| Inverter Model | SMF1 serie | SMF2 serie | SMF3 serie |
| Weld Schedule No. | 64 | 256 | 15-32 |
| Secondary Feedback | Yes | Yes | No |
| Proportional Valve | Yes | Yes | No |
| Networkable | No | Yes | Yes,RS485 |
| Adaptive Control Method | No | Yes | No |
Note:SMF1/2 series inverter can accommodate two weld guns.Communication method include Fieldbus option,Digital I/O,Devicenet,CC-LINK,Profibus,EIP.SMF2 series is a adaptive control welding system.
