A high-power parallel inverter dual power supply dual furnace arbitrary switching device

Abstract

The invention belongs to the technical field of power equipment, and in particular relates to a high-power parallel inverter double-power-supply double-furnace arbitrary switching device. The high-power parallel inverter double-power-supply double-furnace arbitrary switching device comprises a first transformer, a second transformer, a first power supply, a second power supply, a first capacitancecabinet, a second capacitance cabinet, a first induction furnace and a second induction furnace; the first transformer is electrically connected with the first power supply; a first switch and a second switch are arranged in the first capacitance cabinet; both one ends of the first switch and the second switch are each electrically connected with the first induction furnace; the other end of thefirst switch is electrically connected with the first power supply; the second transformer is electrically connected with the second power supply; a third switch and a fourth switch are arranged in the second capacitance cabinet; one ends of the third switch and the fourth switch are electrically connected with the second induction furnace; the other end of the fourth switch is electrically connected with the second power supply; the first power supply is electrically connected with the other end of the third switch; and the second power supply is electrically connected with the other end of the second switch.

Description

technical field [0001] The invention belongs to the technical field of electric power equipment, and in particular relates to a high-power parallel inverter dual power source dual furnace body arbitrary switching device. Background technique [0002] Induction furnaces are divided into two types of power supplies: parallel inverter and series inverter. The advantages and disadvantages of the two power supplies are as follows: [0003] Advantages of series inverter: 1. The power of the power supply can be freely switched between the two furnaces and the power can be distributed arbitrarily: one furnace can be used for oven drying and heat preservation; the other furnace can be used for high-power melting. It is very suitable for continuous casting and casting of large parts (equal to twice the capacity of the furnace body); 2. The rectification is uncontrolled rectification and is always fully open, with high power factor. [0004] Disadvantages of series inverter: 1. Becau...

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Problems solved by technology

[0004] Disadvantages of series inverter: 1. Since the load tank current needs to flow through the device, the power is not large due to the limitation of the device.

[0006] Disadvantages of parallel inverters: 1. When the power is less than the rated power, the power factor is low; 2. The power supply cannot be switched freely, and only one furnace can be used, and the other furnace is used as a backup

[0007] Although the series inverter and the parallel inverter have their own advantages, their respective shortcomings cannot be ignored. The existence of their own shortcomings makes the overall production unable to achieve the purpose of efficient and continuous production. The existing control switches are all installed in capacitors. In the cabinet, in most cases, the anti-opening requirements of the capacitor cabinet are not very high, so most of the existing capacitor cabinets use relatively simple locks, and the difficulty of preventing technical opening is extremely low, but for some special environments, In order to prevent unauthorized opening and unauthorized operation of the interior, thereby causing safety accidents, the safety requirements for the capacitor cabinet are relatively high. The use of general locks makes the capacitor cabinet easy to open, which is likely to cause great safety hazards.

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