Shanghai Junko New Energy Technology Co.,Ltd.
Shanghai Junko New Energy Technology Co.,Ltd.

Characteristics of the Digital IGBT Parallel Resonant Induction Heating Power Supply

Rittal Cabinet


As an important industrial production equipment, it has very significant advantages. Due to its position in the relevant market, it is difficult to shake its status for a considerable period. The Rittal cabinet facilitates the subsequent installation, debugging, and maintenance tasks for workers. It uses sealing glue and three rubber sealing strips for reliable sealing performance. The cabinet door uses a pin-type hinge and can be opened up to 110 degrees. The groove design on the side of the cabinet prevents dust and water from entering and works with the sealing ring to protect the cabinet. The bottom uses an elevated platform or sponge inlet cable clamp for wiring. The installation plate can be moved forward and backward for flexible installation. Rittal cabinets are widely used in various fields such as banking, telecommunications, transportation, retail, manufacturing, healthcare, and government.


PCB Module DIN Rail Mounting


  • Quick installation;


  • Reduced number of spare parts;


  • Easy maintenance;


  • High mechanical stability;


  • Insulated, flame retardant;


  • Dustproof, anti-static;


  • Comprehensive control structure of the power supply;


Efficient and Safe Induction Heating Cooling System


  • Full copper heat sink with good thermal conductivity;


  • Fully sealed chassis, dustproof;


  • Air conditioning temperature control, isolating the cabinet's interior from the external environment;


  • Water-cooling series with a pure stainless steel water circulation system;


  • All-metal structure for water circulation circuit joints, safe and reliable;


  • Self-filtering circulating water.


High Reliability of Digital IGBT Parallel Resonant Induction Heating Power Supply


Using components from internationally renowned brands


The industry's best German Infineon IGBT, Schneider contactors and circuit breakers, German Simicron thyristors, Ti, AD, and StMicroelectronics integrated circuit chips.


Intelligent Protection System


Special protection technology for overvoltage to prevent load open-circuit overvoltage; using IGBT acceleration protection technology to extend the lifespan of IGBTs. Additionally, users can customize power protection schemes according to various situations.


Excellent voltage fluctuation tolerance


With a voltage fluctuation range of 345-445V, the output power fluctuation is ±1‰, not affecting product quality. Compared to traditional induction heating power supplies, the equipment's consistency and stability are significantly improved.


Outstanding structural design


Modular structure with water and electric separation installation to avoid interference; stable performance.


Intelligent Monitoring System of Digital IGBT Parallel Resonant Induction Heating Power Supply


Quality control system and traceability


Events occurring during operations, including process steps, data parameters, faults, alarms, product batches, operator IDs, etc., are effectively recorded in a database. Historical data and curves can be quickly retrieved before daily records to analyze the causes of quality issues and methods of improvement.


Real-time operational status monitoring and remote control


A microprocessor monitors the operational status and various parameters of the power supply in real-time, such as voltage, current, power, frequency, and temperature. These statuses can be transmitted directly into the control network through the internal RS485 interface and convey the required parameters to other controllers (industrial PCs, CNC systems, laptops, local control consoles, remote control rooms, etc.).


Advantages of Digital IGBT Parallel Resonant Induction Heating Power Supply


Optical Fiber Signal Transmission


Since the power devices of the induction heating power supply need to generate high-frequency currents, there is a very high-frequency strong magnetic field inside the cabinet, which greatly interferes with signal transmission between various parts of the circuit, affecting the normal operation of the equipment. Optical fiber transmits signals in the form of light, neither conductive nor magnetic, and will not be interfered with by electromagnetic fields during signal transmission. It has a strong resistance to industrial electromagnetic interference. Therefore, we use optical fiber to transmit important drive signals, avoiding electromagnetic interference and enhancing equipment stability.


Optical fiber has strong anti-interference capabilities in signal transmission and very low signal loss during transmission. When transmitting signals over the same distance, the loss of optical fiber is one percent of that of an ordinary cable. Therefore, signal transmission to distant ends has negligible loss, and due to the low loss, there is no need for amplification and retransmission, avoiding new signal distortion due to amplification, ensuring high signal fidelity, and good circuit stability.


Compared to ordinary cables, optical fiber has good stability, and environmental changes including temperature and humidity have almost zero impact on optical fiber, not affecting signal transmission, enhancing the equipment's adaptability to the environment.


Adaptive Automatic Control of Digital IGBT Parallel Resonant Induction Heating Power Supply


Frequency adaptation


No manual intervention is needed when adjusting the process or when there are changes in the coil or load. Power frequency automatically tracks and jumps to the optimal resonant frequency of the load.


Load adaptation


During process adjustments or load changes, the power supply and load automatically match to the optimal working condition, achieving high production efficiency, consistent quality, and equipment reliability.


Stepless power adjustment


Stepless adjustment range of 5%-100%, with an adjustment accuracy of more than 0.1%. For any load (no-load/full-load), any temperature, 0.2 seconds, rapid start, 100% success rate, with a repeatability accuracy of 0.1%.


Constant power output mode


In load-matching conditions, after the power input is completed, the output power remains constant even after changes in working conditions (such as changes in the temperature of the workpiece, workpiece jump, etc.).


Temperature curve and constant temperature control


Strong linkage between power and temperature. Through the automatic control system of power and temperature, precise and stable control of the heating temperature is achieved.


Main Advantages of Induction Heating


The main advantages of induction heating are: no overall heating, small deformation, low energy consumption; no damage; rapid heating, no oxidation, and decarbonization on the surface of the workpiece; the surface hardening layer can be adjusted and easily controlled as required; heating equipment can be installed on machining production lines, facilitating mechanization and automation, easy management, reducing transportation, saving manpower, and improving production efficiency; martensite hardness, strength, and toughness are relatively high; there is a large compressive stress on the surface of the workpiece, making it more resistant to fatigue and damage.


Induction heating heat treatment also has some disadvantages. Compared with flame quenching, induction heating equipment is relatively complex, less adaptable, and the quality of complex-shaped parts is challenging to ensure.


Induction heating is widely used for surface hardening of gears, shafts, crankshafts, cams, rollers, and other workpieces to improve their wear resistance and fatigue failure resistance. The induction heating surface hardening of automotive rear axles increases the fatigue cycle under the designed load by about 10 times compared to adjustment treatment.


Advantages of Digital DSP Induction Heating Machines


Energy-saving induction power supply: Using digital frequency tracking technology ensures that the IGBT always operates at zero crossing, maintaining the inverter power factor above 95% at all times. The composite structure of the mainboard allows the entire inverter unit to operate without an absorption circuit, significantly improving the inverter efficiency.