CN202663111U

CN202663111U - Active filtering compensation device for intermediate frequency furnace

Info

Publication number: CN202663111U
Application number: CN2012202942329U
Authority: CN
Inventors: 邵泽华; 姜文东
Original assignee: SHANDONG BLUE POWER TECHNOLOGY Co Ltd
Current assignee: SHANDONG BLUE POWER TECHNOLOGY Co Ltd
Priority date: 2012-06-21
Filing date: 2012-06-21
Publication date: 2013-01-09
Anticipated expiration: 2022-06-21

Abstract

The utility discloses an active filtering compensation device for an intermediate frequency furnace. The active filtering compensation device comprises an electric reactor and an IGBT (Insulated Gate Bipolar Transistor) module, wherein the electric reactor and the IGBT module are respectively provided with a first liquid cooling radiator and a second liquid cooling radiator in a corresponding manner. During work, the heat generated by the electric reactor and the IGBT are transmitted to the corresponding radiators in a heat transfer form, then, the corresponding radiators transmit the heat to the condensed flowing liquid in the radiators, and finally, the flowing liquid carries and discharges the heat, so that the active filtering compensation device for the intermediate frequency furnace is cooled well.

Description

The intermediate frequency furnace active power filter compensating device

Technical field

The utility model relates to a kind of active power filter, relates in particular to a kind of intermediate frequency furnace active power filter compensating device.

Background technology

Develop rapidly along with power electronic technology, increasing intermediate frequency furnace equipment has replaced traditional smelting equipment, its load has non-linear or has time-varying characteristics, non-linear, impact and the uneven electrical characteristics of using have been caused, thereby transient state impact in the electrical network, reactive power, high order harmonic component and three-phase imbalance problem are on the rise, cause serious pollution for the power supply quality of utility network, increased the energy loss of electric power system, also shorten simultaneously the useful life of power consumption equipment, also can cause electromagnetic interference to other electronic equipment.Therefore, solve Harmonious Waves in Power Systems and suppress and reactive power compensation, the raising grid supply quality becomes and becomes more and more important.

Traditional harmonic wave suppresses and the method for reactive power compensation is that electrical passive filter is in parallel with the nonlinear load that needs compensation, also provides load required reactive power when providing a low impedance path for harmonic wave.Passive filter is formed by power capacitor, reactor and resistor appropriate combination, is divided into single tuning, high pass and double-tuned filter.Its advantage is economic, practical and reliable.But also exist following shortcoming: (1) filter effect is relevant with load, and namely affected by system parameters larger for filtering characteristic, and several subharmonic that can only suppress to fix, and filtering characteristic is relatively poor; (2) can only compensate fixing reactive power, can not compensate accurately the reactive power that changes.(3) inapplicable for the higher occasion of power factor.Such as being to use the IGBT device to make for present most electric furnaces, its power factor in service is higher, but harmonic wave is more serious, and traditional filter can not solve this class problem, just only has the active type of use filter to solve.(4) site environment is abominable, and dust etc. are larger, and traditional air-cooled or natural air cooling no longer is fit to on-the-spot operation.

Active power filter (active power filter is called for short APF) is to suppress at present mains by harmonics and compensating power, improves the most effectively device of grid supply quality.Compare with passive filter, APF has height and can control and fast response characteristic, and can follow the tracks of the compensation each harmonic, automatically produces the reactive power of required variation, and its characteristic is not subjected to systematic influence, and without harmonic wave amplification threat, relative volume weight is less.Be accompanied by the development of active power filtering control technology, increasing APF puts in the middle of the field, the existing problem of APF self also shows, in these problems, because the switching frequency of IGBT is higher, the heat radiation of APF and own loss problem are particularly serious, and the heat dissipation problem that therefore how to solve APF becomes extremely important with the own loss that how to reduce APF, the operation stability of simultaneously necessary assurance equipment.

The utility model content

The purpose of this utility model is to provide a kind of intermediate frequency furnace active power filter compensating device of good heat dissipation effect.

For achieving the above object, the utility model provides a kind of intermediate frequency furnace active power filter compensating device, comprises reactor and IGBT module, and described reactor and described IGBT module respectively correspondence are provided with the first liquid cooling heat radiator and the second liquid cooling heat radiator.

Intermediate frequency furnace of the present utility model is with in the active power filter compensating device, reactor and IGBT module respectively correspondence are provided with the first liquid cooling heat radiator and the second liquid cooling heat radiator, during work, the heat that reactor and IGBT module produce is delivered on the corresponding radiator by the form of heat transmission, again by the radiator of correspondence with the heat transferred position working fluid of condensation in the inner, by working fluid heat is carried discharge at last, thereby so that this intermediate frequency furnace had preferably radiating effect with active power filter compensating device.

Description of drawings

Fig. 1 is the structure principle chart that intermediate frequency furnace of the present utility model is used active power filter compensating device;

Fig. 2 is the main TV structure schematic diagram that intermediate frequency furnace of the present utility model is used the reactor of active power filter compensating device;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the main TV structure schematic diagram that intermediate frequency furnace of the present utility model is used the IGBT module of active power filter compensating device;

Fig. 5 is the left view of Fig. 4.

Embodiment

Below in conjunction with accompanying drawing the embodiment of intermediate frequency furnace of the present utility model with active power filter compensating device is described in detail:

With reference to shown in Figure 1, identical with existing active power filter compensating device, the intermediate frequency furnace of the present embodiment comprises also that with active power filter compensating device reactor 1, real-time current sample circuit, harmonic wave extract circuit, PWM control output circuit and IGBT module 2, wherein, the real-time current sample circuit is used for gathering electric power system by the real-time current signal of reactor 1 to nonlinear load output; Harmonic wave extracts circuit the real-time current signal that collects is carried out harmonic analysis, extracts the individual harmonic current component; PWM control output circuit inputs to IGBT module 2 with the individual harmonic current component that extracts, and exports accordingly the corresponding Contrary compensation function of current in the output of reactor 1 by IGBT module 2.Different from existing active power filter compensating device is, the intermediate frequency furnace of the present embodiment with the reactor 1 of active power filter compensating device and IGBT module 2 respectively correspondence be provided with the first water-filled radiator 3 and the second water-filled radiator 4.

In conjunction with Fig. 2 and shown in Figure 3, the coiling of the winding of reactor 1 is thinner copper pipe, copper pipe is the second water-filled radiator 4, that is to say, the second water-filled radiator 4 both also was used for heat radiation as winding, the second water-filled radiator 4 is independently double-inlet 42 and double outlets 41 structures, on these two water inlets 42 respectively correspondence be provided with a winding input terminal 51 and winding terminal 52.Double-inlet 42 is positioned at the below of double outlets 41, is conducive to so the in use interior air of discharge pipe.

In conjunction with Fig. 4 and shown in Figure 5, the first water-filled radiator 3 is used for the quick heat radiating of IGBT module 2 for being installed on the radiating tube of the circuitous curved arrangement in the IGBT module 2, and is same, the inlet 32 of the first water-filled radiator 3 is positioned at the below of its liquid outlet 31, is beneficial to the in use interior air of discharge pipe.

Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.

Claims

1. intermediate frequency furnace active power filter compensating device, comprise reactor (1) and IGBT module (2), it is characterized in that, described reactor (1) and described IGBT module (2) respectively correspondence are provided with the first liquid cooling heat radiator (3) and the second liquid cooling heat radiator (4).

2. intermediate frequency furnace active power filter compensating device according to claim 1 is characterized in that, the coiling of the winding of described reactor (1) is copper pipe, and described copper pipe is described the second liquid cooling heat radiator (4).

3. intermediate frequency furnace active power filter compensating device according to claim 2 is characterized in that, the inlet (32) of described the first liquid cooling heat radiator (3) is positioned at the below of its liquid outlet (31).

4. intermediate frequency furnace active power filter compensating device according to claim 3, it is characterized in that, described the second liquid cooling heat radiator (4) is independently two inlets (42) and pair liquid outlet (41) structure, and described pair of inlet (42) is positioned at the below of described pair of liquid outlet (41).