KGPS-G type controllable silicone intermediate-frequency power supply enables 3-phase AC electricity to be transformed into DC electricity through commuting, then by counter-changing circuit to provide single-phase intermediate-frequency AC power supply to intermediate-frequency coreless sensing furnace for heating of metals. It applies AC-DC-AC frequency-transforming ways.
     Controllable silicone intermediate-frequency power supply can be divided into main circuit and control circuit. Details as following：
     1. Main circuit includes rectifying circuit, counter-changing circuit and load resonance circuit. For rectifying circuit, controllable silicone 3-phase full-control rectifying-bridge is applied. 3-phase AC power supply is transformed into DC power supply after rectified by 3-phase full-control bridge, then after counter-changed by counter-changing circuit, single-phase intermediate-frequency AC power supply is output and provided to load-parallel connected resonance circuit. This circuit has simple route, and quite adaptive to kinds of loads, with good universal use. This series of products have completely overcome the disadvantage of bad starting function of other resonance circuits. Because the work frequency of parallel-connected controllable silicone intermediate-frequency power supply can automatically track the resonance frequency of load circuit, and will not bring any bad influence to parallel-connected controllable silicone intermediate-frequency power supply because of the change of resonance frequency, and the general efficiency of the equipment is improved.
     2. Control circuit is made of 5 parts: rectifying spring, counter-changing spring, automatic adjustment, stable-volt power supply and protection. Control circuit is the core of the whole equipment. It decides the work way of the whole equipment, and is most important to the integration of the equipment. KGPS-C type controllable silicone intermediate-frequency power supply applies double closed-loop automatic control system of current and voltage. It can automatically adjust the work current and voltage of the whole equipment when the equipment is working normally, and guarantee that the maximum current and voltage will not surpass the rated value, to ensure the stable and reliable work of the whole equipment. Counter-changing spring circuit automatically tracks the resonance frequency of load resonance circuit to control the counter-changing circuit, so as to guarantee it works under the resonance spot of the load, and the whole equipment works under the best condition, so as to decrease the non-energy-increase wasting of the equipment and realize high efficiency and energy-saving.
     3. This power supply has good system protection circuit, including: automatic protection system of water supply pressure of the equipment, over-current grade protection system, over-voltage automatic protection system. No matter what malfunction occurs, the protection system can reliably cut the power supply immediately, so as to ensure the safety of the equipment and production.
     4.KGPS-C type controllable silicone intermediate-frequency power supply has small size (outer size: 1600x800x550mm), light in weight, occupies small space, with easy installation and maintenance. It is an ideal intermediate-frequency sensing heating equipment.