CN2200890Y - Power special for triple-frequency induction furace - Google Patents
Power special for triple-frequency induction furace Download PDFInfo
- Publication number
- CN2200890Y CN2200890Y CN 94216295 CN94216295U CN2200890Y CN 2200890 Y CN2200890 Y CN 2200890Y CN 94216295 CN94216295 CN 94216295 CN 94216295 U CN94216295 U CN 94216295U CN 2200890 Y CN2200890 Y CN 2200890Y
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- China
- Prior art keywords
- transformer
- power
- triple
- frequency tripling
- control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a power special for induction heating and smelting facilities, which comprises a triple-frequency transformer SB, a parallel compensation condenser of the secondary part of the transformer and a direct current control one-way saturable reactor ZK which is concatenated in a load loop. The power can enhance the input and output voltage of transformers safely, reduce the power consumption of electric furnaces, raise the power factors of electric furnaces and primary parts of the transformers and improve load characteristics; thus the future application of triple-frequency induction furnaces is expanded.
Description
The utility model relates to the induction heating melting equipment that a kind of metallurgical industry is used, the specifically supply unit in this equipment.
The frequency tripling transformer is the supply unit of electric induction furnace.The frequency tripling transformer is made up of three single-phase transformers, and primary winding is connected into star, and secondary coil is connected into open-delta, constitutes the three-phase input, single-phase output.Be that the former side of frequency tripling transformer connects three-phase 50Hz AC power, electric energy becomes single-phase 150Hz AC energy and outputs on the inductor of electric induction furnace from paying the side through transformation and phase, frequency conversion.Because inductor is an inductive load, power factor is very low, therefore the former side at the frequency tripling transformer is connected to shunt compensation electric capacity, paying square also connect series compensation capacitance and shunt compensation electric capacity, and according to the load variations situation, the shunt compensation electric capacity of paying the side also is divided into can be in harmonious proportion fixedly two parts capacitor group, to adapt to the variation adjusting of power factor.The frequency tripling transformer generates powerful triple-frequency harmonics AC energy at the furnace charge internal induction, so that furnace charge is realized heating, fusing and melting to body of heater inductor input triple-frequency harmonics AC energy.Because the structural limitations of the supply unit of frequency tripling electric induction furnace makes its load characteristic soft excessively, the power consumption height, and the power factor of power supply itself is too low.
The purpose of this utility model just provides a kind of power supply new construction of frequency tripling electric induction furnace, to overcome above-mentioned defective, improves the serviceability of electric induction furnace.
The utility model is achieved in that the version of maintenance frequency tripling transformer itself is constant, the unidirectional saturable reactor of paying serial connection DC control between side and the load at the frequency tripling transformer, keep original transformer simultaneously and pay and to be in harmonious proportion fixedly shunt compensation electric capacity, promptly constitute an improved comprehensive supply unit.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is the unidirectional saturable reactor structural representation of DC control.
Among Fig. 1, the power source special of this frequency tripling electric induction furnace comprises the unidirectional saturable reactor ZK of frequency tripling transformer SB, DC control and shunt compensation capacitor C 1, C2.Frequency tripling transformer SB still is star a---open-delta connection, former square tube is crossed isolating switch GK and circuit breaker DL and three-phase 50Hz AC power and is joined, pay the side and connect fixedly shunt compensation capacitor C 2 and adjustable shunt compensation capacitor C 1, promptly in the C1 branch road, be connected to contactor K, turn-off in order to control.Power source loads is the side that pays that the inductor GQ on the electric induction furnace is connected to SB.The unidirectional saturable reactor ZK of DC control is serially connected in pair side and the load circuit between the load of SB.Its concrete structure is shown in 2, be made up of alternate current operation coil L1, the L2 of two identical iron core A, B and the reverse parallel connection coiling on two iron cores and DC control coil L3, the L4 of forward series connection coiling, DC power supply UK is connected to the two ends of DC control coil L3, L4.
The unidirectional saturable reactor of this DC control principle that to be the interchange effective permeability that utilizes magnetic material change with the magnetization of DC control electric current changes the interchange reactance value, thereby changes electric current, the voltage drop in the load and power in the load circuit.Because direct current strengthens, the direct current effective permeability has also reduced the interchange effective permeability simultaneously with regard to corresponding raising, and the effective reactance value is reduced, and voltage and the power transported in the load will increase, and have changed the supplied character of this supply unit thus.The consumption of direct current energy can be controlled in below 3 ‰ of electric induction furnace power.
After this power supply adds direct-flow controlling device, the first, can improve input, the output voltage of frequency tripling transformer safely and reliably, can reduce the power consumption of electric furnace significantly.The second, also can give full play to the compensating action of shunt peaking circuit, make the furnace power factor bring up to 0.95, the former side's power factor of transformer brings up to 0.92, thereby can save the former side's building-out capacitor and the losing side serial connection connection building-out capacitor of original transformer fully.The 3rd, the transformer side of paying impedance drop drops to 7% by 43%, has solved the soft excessively problem of load characteristic.Expanded the application prospect of frequency tripling electric induction furnace thus.
Claims (2)
1, a kind of frequency tripling electric induction furnace power source special, include frequency tripling transformer SB, the former side of transformer SB connects three-phase alternating-current supply, inductor GQ with electric furnace after paying the side and meeting building-out capacitor C1, C2 joins, and it is characterized in that the unidirectional saturable reactor ZK that is serially connected with DC control between side and the load that pays at frequency tripling transformer SB.
2, power source special according to claim 1, the unidirectional saturable reactor ZK that it is characterized in that DC control is made up of alternate current operation coil L1, the L2 of two identical iron core A, B and reverse parallel connection coiling on two iron cores and DC control coil L3, the L4 of forward series connection coiling, and DC power supply UK is connected to the two ends of direct control coil L3, L4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94216295 CN2200890Y (en) | 1994-07-08 | 1994-07-08 | Power special for triple-frequency induction furace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94216295 CN2200890Y (en) | 1994-07-08 | 1994-07-08 | Power special for triple-frequency induction furace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200890Y true CN2200890Y (en) | 1995-06-14 |
Family
ID=33832036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94216295 Expired - Fee Related CN2200890Y (en) | 1994-07-08 | 1994-07-08 | Power special for triple-frequency induction furace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200890Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178623A (en) * | 2013-03-01 | 2013-06-26 | 西安理工大学 | Magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit |
-
1994
- 1994-07-08 CN CN 94216295 patent/CN2200890Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178623A (en) * | 2013-03-01 | 2013-06-26 | 西安理工大学 | Magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 1995.06.14 |