CN211239720U - Parallel resonance induction heating power supply for double-station switching output - Google Patents

Abstract

The utility model provides a parallel resonance induction heating power for duplex position switches output, includes current source, a plurality of contravariant bridges and can control the controller of a plurality of contravariant bridge break-make, a plurality of contravariant bridges are parallelly connected each other, and the input of a plurality of contravariant bridges all is connected with the current source, and a plurality of contravariant bridges divide into two sets ofly, and the output of two sets of contravariant bridges is connected with a respective station load respectively, and the controller is connected with a plurality of contravariant bridges simultaneously to thereby it realizes duplex position switching output to control two sets of contravariant bridge break-make in turn. Because the mechanical switcher does not need to be reused, the defect of the mechanical switcher is eliminated, the leakage inductance phenomenon of mechanical switching is thoroughly avoided, the stability of the power supply is ensured, the output power of a single station load can be adjusted in a large range by adjusting the induction heating power supply, the large-range cross-frequency switching from the intermediate frequency to the high frequency is carried out between the two station loads, the external power adjusting equipment is not needed, and the use is convenient and the cost is lower.

Description

Parallel resonance induction heating power supply for double-station switching output

Technical Field

The utility model relates to a parallel resonance induction heating power field especially relates to a parallel resonance induction heating power that is used for duplex position to switch output.

Background

At present, in various machines and other equipment, two work station loads are arranged, and the two work station loads need to be alternately switched to output. The existing method is generally realized by an induction heating power supply and a mechanical switcher, firstly, the power supply is inverted through an inverter bridge, the inverter bridge is connected with the input of the mechanical switcher, the output of the mechanical switcher is respectively connected with two station loads, and the mechanical switcher is controlled by a controller to switch between two paths of output, so that the two station loads can be alternately switched and output. However, the mechanical switch has the disadvantages of poor stability, high failure rate of the switch, long and inconsistent mechanical switching delay time, and mechanical switching leakage inductance is likely to occur to affect the stability of the power supply. Moreover, the existing structure has a small adjustment range for the output power of two station loads, and when the output power of a single station load needs to be adjusted in a large range or a high-frequency switching needs to be performed between the two station loads, extra power adjustment equipment is usually required, so that the use is inconvenient and the cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a parallel resonance induction heating power for duplex position switches output can overcome the shortcoming of mechanical switch to be convenient for adjust on a large scale the switching to the output of station.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the utility model provides a parallel resonance induction heating power for duplex position switches output, includes current source, a plurality of contravariant bridges and can control the controller of a plurality of contravariant bridge break-make, a plurality of contravariant bridges are parallelly connected each other, and the input of a plurality of contravariant bridges all is connected with the current source, and a plurality of contravariant bridges divide into two sets ofly, and the output of two sets of contravariant bridges is connected with a respective station load respectively, and the controller is connected with a plurality of contravariant bridges simultaneously to thereby it realizes duplex position switching output to control two sets of contravariant bridge break-make in turn.

Preferably, the inverter bridge is connected with four IGBT modules and four diodes, and the controller is connected with the four IGBT modules respectively so as to control the four IGBT modules to be switched on and off alternately and synchronously.

According to the technical scheme, the beneficial effects of the utility model are that:

the utility model provides a parallel resonance induction heating power for output is switched to duplex position, provide the output for a station load respectively through two sets of contravariant bridges, and the break-make of contravariant bridge can control through the controller is convenient, just can realize that the duplex position switches the output, compare with prior art and need not reuse mechanical switch, just also eliminated mechanical switch poor stability, the switch fault rate is high, mechanical switching delay time is long and inconsistent shortcoming, thoroughly avoid mechanical switching to leak and feel the phenomenon, guarantee the stability of power. And compare with prior art and replace an inverter bridge for two sets of inverter bridges, consequently two sets of inverter bridge quantity separately, and the component specification that adopts respectively in two sets of inverter bridges can both be adjusted alone, just also can adjust the output of an independent station, adjusts through the component to parallel resonance induction heating power self promptly, just can reach the effect of adjusting the output of an independent station, consequently the utility model discloses self just can adjust on a large scale the output of an independent station load to carry out the switching of striding frequently on a large scale of intermediate frequency to high frequency (1 KHz-150 KHz) between two station loads, and no longer need be with the help of outside power adjusting equipment, convenient to use and the cost is lower.

Drawings

FIG. 1 is a schematic diagram of a conventional induction heating power supply providing dual-station switching output;

fig. 2 is a schematic diagram of the dual-station switching output provided by the present invention.

Detailed Description

As shown in fig. 1, a schematic diagram of double-station switching output is provided for an existing induction heating power supply, three-phase 380V voltage enters a current source, and after rectification and filtering, 0-500V direct-current voltage can be obtained, and then the direct-current voltage is transmitted to a mechanical switcher after inversion is performed through an inverter bridge, the mechanical switcher is simultaneously connected with an a-station load and a B-station load, and during work, the mechanical switcher is controlled through a controller, so that the a-station load and the B-station load can be switched and output. However, the mechanical switch has the disadvantages of poor stability, high failure rate of the switch, long and inconsistent mechanical switching delay time, and is prone to mechanical switching leakage inductance which affects the stability of the power supply. Moreover, as shown in fig. 1, since the output power to the mechanical switcher after inversion is constant, the adjustment range of the output power of the mechanical switcher to the a-station load and the B-station load is small, when the power of a single one of the a-station load and the B-station load needs to be adjusted in a large range or when a large frequency switching between the a-station load and the B-station load needs to be performed, the adjustment cannot be performed by adjusting the induction heating power supply, and an additional power adjusting device must be added, which is inconvenient to use and increases the cost.

As shown in fig. 2, for the utility model discloses a parallel resonance induction heating power for duplex position switching output, including electric current source, a plurality of contravariant bridges and the controller that can control a plurality of contravariant bridge break-make, a plurality of contravariant bridges are parallelly connected each other, and the input of a plurality of contravariant bridges all is connected with the electric current source, and a plurality of contravariant bridges divide into two sets ofly, and the output of two sets of contravariant bridges is connected with respective station load respectively, and the controller is connected with a plurality of contravariant bridges simultaneously to thereby it realizes duplex position switching output to control two sets of contravariant bridges break-make in turn. In fig. 2, two inverter bridges a and B are adopted, the inverter bridge a corresponds to the station load a, the inverter bridge B corresponds to the station load B, three-phase 380V voltage enters a current source, and is rectified and filtered to obtain 0-500V direct current voltage, and then the direct current voltage is inverted by the two inverter bridges and is respectively transmitted to the two station loads. In the figure 2, the inverter bridge is connected with four IGBT modules and four diodes, and the controller is respectively connected with the four IGBT modules to control the four IGBT modules to be alternately switched on and off synchronously, namely, the on-off state of the inverter bridge is controlled, so that the controller can conveniently control the alternate on and off between the A inverter bridge and the B inverter bridge, even if the quantity of the A inverter bridge or the B inverter bridge is changed into a plurality of inverter bridges, the double-station switching output of the A station load and the B station load can be realized, a mechanical switcher is not needed, and the defects of the mechanical switcher are overcome. When the power of a single one of the A station load and the B station load needs to be adjusted in a large range or the large-frequency switching between the A station load and the B station load needs to be performed, one of the A inverter bridge and the B inverter bridge can be adjusted, the specification and the model of an IGBT module in the A inverter bridge or the B inverter bridge can be changed, more inverter bridges can be connected in parallel on the A inverter bridge or the B inverter bridge, namely, the number of the same set of inverter bridges is changed, no external power adjusting equipment needs to be added in any mode, the output power of the station load can be changed by adjusting the parallel resonance induction heating power supply, the output frequency of the double-station switching can realize the large-range cross-frequency switching from the medium frequency to the high frequency (1 KHz-150 KHz), the application range is wider, and the use is more convenient, and the overall cost can be reduced by eliminating external power conditioning devices and mechanical switches.

Claims (2)

1. The utility model provides a parallel resonance induction heating power for duplex position switches output which characterized in that: the double-station switching output device comprises a current source, a plurality of inverter bridges and a controller capable of controlling the on-off of the inverter bridges, wherein the inverter bridges are connected in parallel, the input ends of the inverter bridges are connected with the current source, the inverter bridges are divided into two groups, the output ends of the two groups of inverter bridges are respectively connected with a respective station load, and the controller is simultaneously connected with the inverter bridges so as to control the on-off of the two groups of inverter bridges alternately to realize double-station switching output.

2. The parallel resonant induction heating power supply for double-station switched output of claim 1, wherein: the inverter bridge is connected with four IGBT modules and four diodes, and the controller is respectively connected with the four IGBT modules so as to control the four IGBT modules to be switched on and off alternately and synchronously.

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