How to choose the right IGBT high-frequency induction heating equipment Induction heating is the induction heating equipment output high-frequency current, through the induction loop to produce alternating magnetic field, through the metal workpiece placed in the induction loop to form eddy currents, so that it quickly heated, and the induction loop itself It does not produce heat for decades. In the mid-1990s, solid-state induction heating equipment began to appear with IGBT modules as the core. Compared with electronic tube high-frequency equipment and SCR induction heating equipment, energy savings were 10%-40%.
Once on the market, many advantages such as its energy-saving and environmental protection, high processing quality, easy operation, safe and reliable operation, and low maintenance cost have become the most ideal heating methods in the field of small metal heating.
Different frequency induction heating devices produce different heating effects, determine the quality of the heating; power size, determines the workpiece heating speed and processing efficiency, so, according to the heating requirements of the workpiece, select the right frequency and power is very important.
First, how to choose the frequency induction heating equipment, according to the output frequency is different, can be roughly divided into: UHF, high frequency, super audio, intermediate frequency and so on. Different heating process requirements require different frequencies. If the frequency is not selected correctly, the heating requirements cannot be met. For example, the heating time is slow, the working efficiency is low, the heating is not uniform, and the temperature does not meet the requirements. This can easily damage the workpiece.
The correct choice of frequency, first of all, to understand the heating process requirements of the product, probably the following situations:
1, the workpiece through the heat, such as: fasteners, standard parts, auto parts, hardware tools, rigging, twist drill hot hot rolling, etc., the larger the diameter of the workpiece, the lower the frequency should be. Such as:
Φ4 mm or less, suitable for high frequency, ultra high frequency (100-500KHz)
Φ4-16,mm for high frequency (50-100 KHz)
Φ16-40 mm for Ultra Audio (10-50 KHz)
Suitable for medium frequency (0.5-10 KHz) above Φ40 mm
2. Heat treatment, shafting, gears, quenching and annealing of stainless steel products, etc. For quenching, for example, the shallower the quenched layer the workpiece requires, the higher the frequency, and the deeper the quenched layer, the lower the frequency. Such as:
The quenched layer is 02.-0.8mm Suitable for 100-250 KHz UHF, high frequency 1.0-1.5mm For 40-50 KHz High frequency, Super audio 1.5-2.0mm For 20-25 KHz Super audio 2.0-3.0mm For 8 -20 KHz Super Audio, Intermediate Frequency 3.0-5.0mm For 4-8 KHz Intermediate Frequency 5.0-8.0mm For 2.5-4 KHz Intermediate Frequency 3, Brazing, Bits, Turning Tools, Reamers, Milling Cutters, Bits, etc. and Stainless Steel Pots Composite welding of different materials, the larger the welding volume, the lower the frequency should be,
Take lathe welding as an example:
20 mm or less tool, suitable for 50-100 KHz high frequency 20 --30 mm or more tools for 10-50 KHz high frequency, over audio 30 mm or more tools, for 1-8 KHz IF.
4. The precious metals such as smelting gold, silver, copper, and lead may be determined based on the furnace and the production efficiency. Small-capacity optional high-frequency, most of the selected super audio, mid-frequency super audio can meet the general application of die-casting industry, the general application of 200KG aluminum ingot can be melted per hour.
Second, how to select the power When you determine the frequency of the machine according to the requirements of your workpiece, the next step is to select the appropriate machine power according to the production situation. The greater the power of the machine, the faster its heating, but its price will increase accordingly. Low-power equipment, low cost, and its slow heating rate.
1. There are usually two types of induction heating power: output power and oscillation power.
The induction heating equipment must rectify the alternating current to obtain the oscillating current and voltage. The oscillating power is the product of the two.
Generally speaking, the power is the load power of the machine, also called the output power, and the oscillating power is only about 60% of the actual output power. If the oscillating power 50KW equipment and the output power 30KW induction heating equipment have the same heating effect under the same conditions.
The following is a comparison of output power/oscillation power of commonly used devices.
25KW/42 KW, 30 KW/50 KW, 50KW/ 80 KW, 80 KW/125 KW
At present, there is no national model calibration method for induction heating equipment. Most manufacturers like to label the product as a factory name identification number + power form such as: XX-20, YY-60, ZZ-100, etc., so some Manufacturers often refer to power as oscillating power, and some manufacturers also mark oscillation power as output power or simply as power in general terms, misleading customers. What's more, simply do not write the power, the input current number calibration model, so that customers mistakenly believe that the literacy is the machine's power. The two are far from each other. Induction heating equipment, usually bought after a long time will not be updated, so that customers understand the differences between the district often regret.
Therefore, when companies introduce products to you, don't just care about the model, and don't forget to ask what the output power is and get it done.
2, the same workpiece processing, different working speeds, power options are also very different, such as; a fastener company to hot-forging Φ30 mm length 50mm screw, heating temperature 1000 degrees, production speed 20 pieces / minute, it should be selected A machine with a frequency of ultra-audio (10-40KHZ) output power of 80 KW is used. If the production speed is reduced to 10 pcs/min, a machine with a frequency of 50 megawatts of super audio (10-40) output power can meet the application. 80 KW The price is higher than 50KW, so manufacturers can choose the most suitable model according to their actual situation, so as to avoid waste.
In addition, the power selection must also take into account the fluctuation of the power supply voltage. For users of three-phase AC power supply, if the voltage is reduced by 10V, the output power will be reduced by about 7%. In general, enterprises use the equipment. , A batch of workpiece heating time is fixed, when the voltage is reduced, in order to ensure that the heating effect, you should increase the power of the machine to achieve the same heating effect. However, if your heating time is set on the premise of the maximum power state of the equipment, when the voltage is reduced, the same heating effect can be achieved only by prolonging the heating time. In this case, it is necessary to re-experiment, obtain the time setting parameter, and delay the production work. , also can not guarantee the quality of the workpiece. Therefore, it is recommended to adjust the power output of the device to 85-90% power state when in use, leaving a margin, which in turn can extend the service life, and can calmly deal with the adverse image caused by voltage fluctuations.
Wuxi Kaide Electric Machinery Co., Ltd. Address: No. 291, Guangyi Road, Chong'an District, Wuxi Contact: Manager Zhang Mobile Phone Fax
E-mail:
Website:
Company website group:
Once on the market, many advantages such as its energy-saving and environmental protection, high processing quality, easy operation, safe and reliable operation, and low maintenance cost have become the most ideal heating methods in the field of small metal heating.
Different frequency induction heating devices produce different heating effects, determine the quality of the heating; power size, determines the workpiece heating speed and processing efficiency, so, according to the heating requirements of the workpiece, select the right frequency and power is very important.
First, how to choose the frequency induction heating equipment, according to the output frequency is different, can be roughly divided into: UHF, high frequency, super audio, intermediate frequency and so on. Different heating process requirements require different frequencies. If the frequency is not selected correctly, the heating requirements cannot be met. For example, the heating time is slow, the working efficiency is low, the heating is not uniform, and the temperature does not meet the requirements. This can easily damage the workpiece.
The correct choice of frequency, first of all, to understand the heating process requirements of the product, probably the following situations:
1, the workpiece through the heat, such as: fasteners, standard parts, auto parts, hardware tools, rigging, twist drill hot hot rolling, etc., the larger the diameter of the workpiece, the lower the frequency should be. Such as:
Φ4 mm or less, suitable for high frequency, ultra high frequency (100-500KHz)
Φ4-16,mm for high frequency (50-100 KHz)
Φ16-40 mm for Ultra Audio (10-50 KHz)
Suitable for medium frequency (0.5-10 KHz) above Φ40 mm
2. Heat treatment, shafting, gears, quenching and annealing of stainless steel products, etc. For quenching, for example, the shallower the quenched layer the workpiece requires, the higher the frequency, and the deeper the quenched layer, the lower the frequency. Such as:
The quenched layer is 02.-0.8mm Suitable for 100-250 KHz UHF, high frequency 1.0-1.5mm For 40-50 KHz High frequency, Super audio 1.5-2.0mm For 20-25 KHz Super audio 2.0-3.0mm For 8 -20 KHz Super Audio, Intermediate Frequency 3.0-5.0mm For 4-8 KHz Intermediate Frequency 5.0-8.0mm For 2.5-4 KHz Intermediate Frequency 3, Brazing, Bits, Turning Tools, Reamers, Milling Cutters, Bits, etc. and Stainless Steel Pots Composite welding of different materials, the larger the welding volume, the lower the frequency should be,
Take lathe welding as an example:
20 mm or less tool, suitable for 50-100 KHz high frequency 20 --30 mm or more tools for 10-50 KHz high frequency, over audio 30 mm or more tools, for 1-8 KHz IF.
4. The precious metals such as smelting gold, silver, copper, and lead may be determined based on the furnace and the production efficiency. Small-capacity optional high-frequency, most of the selected super audio, mid-frequency super audio can meet the general application of die-casting industry, the general application of 200KG aluminum ingot can be melted per hour.
Second, how to select the power When you determine the frequency of the machine according to the requirements of your workpiece, the next step is to select the appropriate machine power according to the production situation. The greater the power of the machine, the faster its heating, but its price will increase accordingly. Low-power equipment, low cost, and its slow heating rate.
1. There are usually two types of induction heating power: output power and oscillation power.
The induction heating equipment must rectify the alternating current to obtain the oscillating current and voltage. The oscillating power is the product of the two.
Generally speaking, the power is the load power of the machine, also called the output power, and the oscillating power is only about 60% of the actual output power. If the oscillating power 50KW equipment and the output power 30KW induction heating equipment have the same heating effect under the same conditions.
The following is a comparison of output power/oscillation power of commonly used devices.
25KW/42 KW, 30 KW/50 KW, 50KW/ 80 KW, 80 KW/125 KW
At present, there is no national model calibration method for induction heating equipment. Most manufacturers like to label the product as a factory name identification number + power form such as: XX-20, YY-60, ZZ-100, etc., so some Manufacturers often refer to power as oscillating power, and some manufacturers also mark oscillation power as output power or simply as power in general terms, misleading customers. What's more, simply do not write the power, the input current number calibration model, so that customers mistakenly believe that the literacy is the machine's power. The two are far from each other. Induction heating equipment, usually bought after a long time will not be updated, so that customers understand the differences between the district often regret.
Therefore, when companies introduce products to you, don't just care about the model, and don't forget to ask what the output power is and get it done.
2, the same workpiece processing, different working speeds, power options are also very different, such as; a fastener company to hot-forging Φ30 mm length 50mm screw, heating temperature 1000 degrees, production speed 20 pieces / minute, it should be selected A machine with a frequency of ultra-audio (10-40KHZ) output power of 80 KW is used. If the production speed is reduced to 10 pcs/min, a machine with a frequency of 50 megawatts of super audio (10-40) output power can meet the application. 80 KW The price is higher than 50KW, so manufacturers can choose the most suitable model according to their actual situation, so as to avoid waste.
In addition, the power selection must also take into account the fluctuation of the power supply voltage. For users of three-phase AC power supply, if the voltage is reduced by 10V, the output power will be reduced by about 7%. In general, enterprises use the equipment. , A batch of workpiece heating time is fixed, when the voltage is reduced, in order to ensure that the heating effect, you should increase the power of the machine to achieve the same heating effect. However, if your heating time is set on the premise of the maximum power state of the equipment, when the voltage is reduced, the same heating effect can be achieved only by prolonging the heating time. In this case, it is necessary to re-experiment, obtain the time setting parameter, and delay the production work. , also can not guarantee the quality of the workpiece. Therefore, it is recommended to adjust the power output of the device to 85-90% power state when in use, leaving a margin, which in turn can extend the service life, and can calmly deal with the adverse image caused by voltage fluctuations.
Wuxi Kaide Electric Machinery Co., Ltd. Address: No. 291, Guangyi Road, Chong'an District, Wuxi Contact: Manager Zhang Mobile Phone Fax
E-mail:
Website:
Company website group:
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