
Medium frequency inverter DC spot welder Adopting the latest generation of medium frequency inverter welding controller, it has many advantages such as short power-on time, high thermal efficiency, three-phase DC output, high working frequency and small transformer loss. It is suitable for welding carbon steel, stainless steel, galvanized, copper, aluminum, aluminum alloy, iron, nickel, high strength steel, hot forming steel and other metal materials. Medium frequency spot welding machine can be widely used in auto parts, auto body, aerospace, high and low voltage electrical, household appliances, elevator, hardware and furniture, new energy and other industries.
![]() | ![]() |
Intelligent welding control systemIntelligent Touch Screen Controller Input and read welding parameters. | Raw materials made to standardThicker Copper Plate or Copper Belt To ensure stable conductivity in welding |
![]() | ![]() |
Custom processing of electrodesCustomized Electrodes which will be suitable for Welding material like steel, aluminium, silver, stainless Steel, and nickel steel. | Shape structure and welding methodDesign the right machine shape and mold according tothe welding product. |
Features of The Intermediate Frequency Spot Welder
1. Three-phase power supply, grid balance, small impact on the grid
The power factor is as high as 0.7-0.9 (power frequency 0.4), which greatly reduces the reactive power loss.
2. Significantly improved welding control accuracy
The inverter frequency reaches above 1000Hz, and the welding current control ability and control accuracy are 20 times higher than those of AC welding machines.
3. Great leap in welding quality
The current waveform is straight, the size of the nugget is stable, the spatter is less, and the surface quality of the solder
joint is good.
4. Save basic investment and save energy
The grid power demand is low, only 2/3 of the AC resistance welding machine; the welding time is short and the electrode life is long.
5. Human-computer interface, easy to operate
Multiple sets of welding specifications can be stored and called with one key, real-time display of welding current and time, monitoring and alarm functions of welding pressure, cold water flow, and welding current.
Model | Voltage V | Rated Capacity KVA | Max Short Circuit Current KA | Duty Cycle Rate % | Electrode Force KG | Electrode Stroke mm | Cooling Water L/min |
XS-MF-5K | 380 3PH | 5 | 1.5 | 50 | 30 | 25 | 10 |
XS-MF-10K | 380 3PH | 10 | 3 | 50 | 100 | 50 | 20 |
XS-MF-15K | 380 3PH | 15 | 4.5 | 50 | 100 | 50 | 20 |
XS-MF-25K | 380 3PH | 25 | 7.5 | 50 | 350 | 80 | 20 |
XS-MF-35K | 380 3PH | 35 | 10 | 50 | 350 | 80 | 20 |
XS-MF-50K | 380 3PH | 50 | 13 | 50 | 800 | 100 | 30 |
XS-MF-75K | 380 3PH | 75 | 18 | 50 | 800 | 100 | 30 |
XS-MF-100K | 380 3PH | 100 | 21 | 50 | 1000 | 100 | 30 |
XS-MF-120K | 380 3PH | 120 | 23 | 50 | 1000 | 100 | 30 |
XS-MF-160K | 380 3PH | 160 | 28 | 50 | 1000 | 100 | 30 |
XS-MF-200K | 380 3PH | 200 | 32 | 50 | 1500 | 100 | 30 |
XS-MF-250K | 380 3PH | 250 | 40 | 50 | 1500 | 100 | 50 |
XS-MF-300K | 380 3PH | 300 | 48 | 50 | 2000 | 100 | 50 |
XS-MF-350K | 380 3PH | 350 | 55 | 50 | 2000 | 100 | 60 |
XS-MF-400K | 380 3PH | 400 | 62 | 50 | 2000 | 100 | 60 |
XS-MF-500K | 380 3PH | 500 | 70 | 50 | 2000 | 100 | 60 |





- High welding stability;
- Save more than 30% electricity and have low operating costs;
- Balanced input of three-phase power supply, with a power factor of up to 95%;
- Lower welding current and electrode pressure;
- The secondary circuit has almost no induced energy loss;
- Increase electrode life by more than double, reducing electrode grinding time;
- Significantly saving the installation costs of electricity and auxiliary facilities such as water and gas;
- Control and analyze welding parameters more accurately, quickly, and comprehensively;
- Shorter welding time, improving work efficiency and welding quality;
- The welding range is wider, and the welding effect is better for low-carbon steel, stainless steel, copper, aluminum, and galvanized sheet;
Ningbo Xinsheng Intelligent Equipment Co., Ltd. Is located on the southern wing of the Yangtze River Delta, in the beautiful coastal city of Ningbo, Zhejiang. The geographical location here is superior, the environment is beautiful, and transportation is extremely convenient. The company is a powerful enterprise specializing in the research and development, design, production, manufacturing, marketing, and service of resistance welding equipment, medium frequency series welding machines, and welding automation specialized machines.
On the basis of more than ten years of development and production of complete sets of equipment, Xinsheng Company has accumulated and absorbed advanced technologies and processes both domestically and internationally, and manufactured complete sets of specialized welding equipment. And we have trained and trained a group of experienced professional resistance welding engineering technicians and teams in welding, mechanical, and electromechanical integration. We always guarantee to provide customers with high-quality and affordable welding equipment and high-quality after-sales service.
The products are widely used in industries such as home appliance hardware manufacturing, automotive and accessory manufacturing, sheet metal manufacturing, solar energy, and electric water heater manufacturing. The company adheres to the corporate philosophy of "working together and developing together", and provides customers with "advanced, applicable, high-quality, and reliable" products in the field of welding technology application with "integrity, quality, and efficiency" services, and develops together with you. Welcome new and old customers to negotiate!



Q1: Are you a trading company or a manufacturer?
A1:We are a factory manufacturer.
Q2: Can I get a sample to check quality before I set up an order?
A2:Yes, of course. Samples are available and free, but sample shipping fee and express cost are on your charge. The sample shipping fee will be refunded after the official order is set.
Q3: Why choose us?
A3:
a. We are a factory manufacturing electric tools.
b. Our products has a competitive price with approved quality.
c. Strict detection during production to make sure the quality of products.
Q4: Do you support OEM/ODM service?
A4:Yes, we do support, we have an experienced R&D team to meet different needs, so welcome to place an OEM/ODM order to us.
Q5: How long is the delivery time?
A5:
a. 2-7 days for sample order.
b. 35-50 days for LCL or FCL order.