A medium-frequency power supply is a power device that converts a 50-hertz industrial frequency power supply into the required frequency through a thyristor inverter. It is widely applied in industrial fields such as smelting, induction heating, metal surface quenching, forging, smelting, precision casting, welding, and piping.
The KGPS series medium frequency power supply I produce adopts the most advanced control technology and production process in China at present. It has the following features:
1.Digital circuits, as the control core, have the advantages of strong control ability, good anti-interference performance, and few peripheral discrete components. The entire control circuit is installed on a 268mmx225mm printed circuit board, and the number of connections with the main circuit is reduced to only twenty-seven. The main components are all imported parts and are assembled after strict aging and screening, so the reliability is very high.
2. The control board eliminates the large-sized synchronous transformer and various other control transformers in the rectifier circuit. It does not recognize the phase sequence, further simplifying the overall circuit and reducing the equipment volume. It also has a complete set of multiple protection measures such as overcurrent, overvoltage, phase loss and low water pressure. The protection action is rapid. Once a circuit fault occurs, the system can act in a very short time to reliably protect the thyristor and capacitor from damage.
3. It adopts zero-voltage swept-frequency soft start and a dual closed-loop regulation system with current negative feedback and voltage negative feedback, enabling the power supply to start reliably in actual use. It has excellent current and voltage cut-off effects and features no impact during start-up and constant power regulation.
Key words：
Techicel Conditions
| Output power | 0-160KW |
| IF frequency | 3000Hz |
| IF output voltage | 0-750V |
| How to start | Sweep frequency zero voltage start |
| Input voltage | Three-phase AC 380V 50HZ |
| Adjustment mode | Voltage and current dual closed-loop regulation |
| Intermediate frequency cabinet | Water |
| Heating table | Water |
| Pulse phase shift range | 0-150° |
| Pulse form and width | Double narrow pulse column 18° |
| Pulse trigger current | ≥800mA |
| Trigger pulse voltage | ≥8V |
| Contact current | 220V 2A |
| Heating time frame | 1-99min |
| efficiency | ≥95% |
| protection | Phase break, water shortage, overcurrent and overvoltage protection |
DC uncontrolled rectifier power supply
| Model | AC input | Power (KW) | Frequency (KHz) | Rectified line | Overall Dimensions (mm) | Remark | |||
| Count | Voltage (V) | high | wide | deep | |||||
| KGPS100-1 | 3 | 380 | 100 | 1 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS100-2.5 | 3 | 380 | 100 | 2.5 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS100-8 | 3 | 380 | 100 | 8 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS100-20 | 3 | 380 | 100 | 20 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS160-1 | 3 | 380 | 160 | 1 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS160-2.5 | 3 | 380 | 160 | 2.5 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS160-8 | 3 | 380 | 160 | 8 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS160-20 | 3 | 380 | 160 | 20 | Bridge style | 2000 | 1200 | 700 | Machine |
| KGPS250-1 | 3 | 380 | 250 | 1 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS250-2.5 | 3 | 380 | 250 | 2.5 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS250-8 | 3 | 380 | 250 | 8 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS250-20 | 3 | 380 | 250 | 20 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS500-1 | 3 | 380 | 500 | 1 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS500-2.5 | 3 | 380 | 500 | 2.5 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS500-8 | 3 | 380 | 500 | 8 | Bridge style | 2000 | 1400 | 900 | Machine |
| KGPS500-20 | 3 | 380 | 500 | 20 | Bridge style | 2000 | 1600 | 1200 | Machine |
| KGPS750-1 | 3 | 380 | 750 | 1 | Bridge style | 2000 | 1600 | 1200 | Machine |
| KGPS750-2.5 | 3 | 380 | 750 | 2.5 | Bridge style | 2000 | 1600 | 1200 | Machine |
| KGPS750-8 | 3 | 380 | 750 | 8 | Bridge style | 2000 | 1600 | 1200 | Machine |
| KGPS750-20 | 3 | 380 | 750 | 20 | Bridge style | 2000 | 1600 | 1200 | Machine |
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FAQ
Here, common questions are answered and clarified
Voltage fluctuation fault
● Youdaoplaceholder6 Common causes:
- The external power supply is unstable or abnormal.
- There is a wiring error during the operation of the equipment.
- Environmental factors (such as temperature changes) cause voltage fluctuations.
● Solve the problem:
- Use a reliable power supply and avoid relying on external power sources.
- Check and adjust the connection method of the equipment.
- Reserve sufficient protection circuits or use step-down circuits to limit the impact of voltage fluctuations.
Short-circuit fault
● Youdaoplaceholder6 Common causes:
- Internal circuit short circuit (such as coil damage).
- External short circuit (such as short-circuiting of power pins).
● Solve the problem:
- Inspect the internal structure of the equipment, identify and repair the short-circuit points in the internal circuits.
- Use disconnected pins or external pins for protection and isolation.
- Reserve sufficient buffer layers or cooling systems to prevent the silicon wafers from overheating and getting damaged.
Current out-of-control (IQN) fault
● Youdaoplaceholder6 Common causes:
- The external current is too large, causing the silicon wafer to bear an excessively high current.
- During the operation of the o equipment, the load was too heavy, causing the silicon wafers to be overloaded.
● Solve the problem:
- Reserve sufficient safety current to ensure that the current during equipment operation does not exceed the designed maximum value of the silicon wafer.
- Use protection circuits or step-down circuits to limit the influence of external currents.
- Reserve sufficient buffer layers to prevent excessive current from damaging the silicon wafer.
Excessively high temperature fault
● Youdaoplaceholder6 Common causes:
- High-temperature environments cause silicon wafers to expand due to heat and get damaged.
- The cooling system failed to effectively cool the silicon wafers.
● Solve the problem:
- Reserve sufficient buffer layers or cooling systems to prevent the silicon wafers from overheating and getting damaged.
- Use a heat sink or coolant (such as water) to lower the temperature of the silicon wafer.
- Regularly inspect and maintain the cooling system of the equipment.
Overload fault
● Youdaoplaceholder6 Common causes:
- During the operation of the equipment, the load was too heavy, causing the silicon wafers to bear excessive current.
- If the external load exceeds the design maximum value of the silicon wafer, it may cause damage to the silicon wafer.
● Solve the problem:
- Reserve sufficient safety load to ensure that the load during equipment operation does not exceed the design maximum value of the silicon wafer.
- Use protection circuits or step-down circuits to limit the influence of external loads.
- Reserve sufficient buffer layers to prevent the silicon wafer from being damaged due to excessive load.
Summary of Solutions for Current Anomaly (IQN) Faults
● Test with a volt-ampere meter: Measure the output voltage and current to ensure they meet the design parameters of the silicon wafer.
● Apply phase difference test: Check the phase deviation of the silicon wafer to ensure its stability in AC signals.
● Dynamic calibration equipment: Dynamically adjust the equipment or external power supply according to the actual working environment (such as temperature changes).
Through regular Testing and Diagnosis processes, faults of thyristor equipment can be identified and resolved more accurately.
Certification
It has passed the ISO9001:2015 quality management system certification. In 2005, it was awarded the titles of "National Rectifier Product Quality Assurance and Honest Business Demonstration Unit" and "National AAA Quality Brand Enterprise" by the China Marketing Association. It has been rated as a "Contract-abiding and Creditworthy Enterprise" by the Wuhan Administration for Industry and Commerce for many years.
Project Case
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Factory
The total number of employees in the unit, including the situation, number and composition ratio of technical personnel at all levels, currently has over 60 employees, including more than 18 engineering and technical personnel. Among them, there are 4 senior engineers, 10 engineers, and 4 assistant engineers and technicians.
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As a designated manufacturer of rectifiers by the former Ministry of Machinery Industry, we specialize in the production of electrolytic and electrochemical rectifiers. We have numerous production achievements and rich manufacturing experience in the electrolytic copper industry.