CN2208752Y - Medium-frequency power source output device - Google Patents
Medium-frequency power source output device Download PDFInfo
- Publication number
- CN2208752Y CN2208752Y CN 94243108 CN94243108U CN2208752Y CN 2208752 Y CN2208752 Y CN 2208752Y CN 94243108 CN94243108 CN 94243108 CN 94243108 U CN94243108 U CN 94243108U CN 2208752 Y CN2208752 Y CN 2208752Y
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- China
- Prior art keywords
- frequency power
- medium
- intermediate frequency
- load
- oscillation circuit
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- Expired - Fee Related
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Abstract
The utility model relates to a medium-frequency power source output device. The output terminal of the square wave current of a medium-frequency power source is connected with a low-loss dummy load oscillation circuit. The oscillation frequency of the dummy load oscillation circuit is the same as the oscillation frequency of the truth load oscillation circuit, so that the dummy load oscillation circuit can absorb the higher harmonic in the medium-frequency output current and simultaneously the capacitance C' in the dummy load can solve the current converting problem of the medium-frequency power source inverter so as to make the starting operation not fail. If users adopt the technical proposal, the utility model can make the medium-frequency first harmonic current be transmitted to the load oscillation circuit in long distance; in addition, the utility model can enhance the starting capability.
Description
The utility model belongs to the circuit arrangement of power supply or distribution, relates to the output circuit device of intermediate frequency power supply.
Most intermediate frequency power supply electric energy are exported with square wave current.The load that receives the intermediate frequency electric energy is inductor and one group of hunting of load loop that the intermediate frequency capacitor C composes in parallel that is made of L and resistance r.Be connected with copper bus-bar between intermediate frequency power supply and the hunting of load loop, the sort circuit device, two subject matters can occur when distance between intermediate frequency power supply and the load is far away: first problem is that the copper bus-bar electric energy loss is bigger, because contain bigger high order harmonic component in the square wave current, busbar presents high resistance to high order harmonic component, causes very lossy; Second problem is starting difficulty, because distance busbar inductance far away more is big more, makes intermediate frequency power supply inverter change of current difficulty, causes starting failure.For this reason, this class intermediate frequency power supply is difficult to be arranged in from load position far away at present, and is particularly outstanding when frequency is higher.
The utility model is the shortcoming that will overcome prior art, provides a kind of loss Xiao Yi starting to be suitable for longer-distance intermediate frequency power supply output circuit device.
Technical scheme: this intermediate frequency power supply output device and the prior art main distinction are to be connected between intermediate frequency power supply and the copper bus-bar dummy load oscillation circuit of low energy consumption, and this loop is composed in parallel by electric capacity and inductance.
The drawing explanation:
Fig. 1 is the circuit theory diagrams of existing intermediate frequency power supply output device;
Fig. 2 is circuit theory diagrams of the present utility model.
Further specify technical scheme with reference to accompanying drawing:
Figure 1 shows that existing intermediate frequency power supply output circuit.Intermediate frequency power supply 1 is transported to hunting of load loop 2 with square wave current i through copper bus-bar 4, and this loop is formed in parallel by series inductance L, resistance r and capacitor C.
Shown in Figure 2 is in the technical solution of the utility model after improving on the prior art basis.Connect a low-loss dummy load oscillation circuit between the output of intermediate frequency power supply 1 and the copper bus-bar 4, this loop by inductance L ' with capacitor C ' be formed in parallel.And copper bus-bar is terminal the same with prior art and joined by the true hunting of load loop 2 that inductance L, resistance r and capacitor C compose in parallel.
The resonance frequency f ' of C ' L ' approaches the resonance frequency f of hunting of load loop ［ 2 ］ in the dummy load oscillation circuit 3, i.e. f '=f.
Advantage of the present utility model:
1. the long-distance transmissions loss is little
Because of the high order harmonic component in the intermediate frequency output square wave current basically by capacitor C ' absorb, simultaneously for the first-harmonic dummy load in the square wave be bordering on resonance (because of dummy load close with the resonance frequency of true load, and true load is in the quasi-resonance state to first-harmonic), and the dummy load loop is the low-loss loop, so dummy load presents high impedance and is bordering on open-circuit condition first-harmonic, fundamental current is defeated by true load 2 by copper bus-bar 4, does not just have than lossy so the intermediate frequency electric energy transfers to true load by remote busbar.
2. starting easily is difficult for failure
Because dummy load is very close to intermediate frequency power supply, the square wave current change of current of intermediate frequency power supply can be by the capacitor C in the dummy load loop 3 ' finish, and needn't finish by the remote busbar that big inductance is arranged, and causes the change of current to be had no problem, and starting also just is difficult for failure.
The technical solution of the utility model is not only applicable to the transmission of square wave electric wave, is applicable to that other contain the long-distance transmissions of the electric current of intermediate frequency of high order harmonic component yet.
Claims (2)
1, a kind of intermediate frequency power supply output device, it is used to transmit square wave current or contains other electric currents of high order harmonic component, connecting load by intermediate frequency power supply [1] through copper bus-bar [4] forms, load is inductance L, resistance r and one group of hunting of load loop [2] that the intermediate frequency capacitor C composes in parallel, it is characterized in that between intermediate frequency power supply output and copper bus-bar [4], being connected by capacitor C ' with the dummy load oscillation circuit [3] of inductance L ' compose in parallel.
2,, it is characterized in that the resonance frequency f ' of dummy load oscillation circuit ［ 3 ］ should approach the resonance frequency f of hunting of load loop ［ 2 ］, i.e. f '=f according to the described intermediate frequency power supply output device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94243108 CN2208752Y (en) | 1994-10-17 | 1994-10-17 | Medium-frequency power source output device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94243108 CN2208752Y (en) | 1994-10-17 | 1994-10-17 | Medium-frequency power source output device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2208752Y true CN2208752Y (en) | 1995-09-27 |
Family
ID=33849551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94243108 Expired - Fee Related CN2208752Y (en) | 1994-10-17 | 1994-10-17 | Medium-frequency power source output device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2208752Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054927A (en) * | 2017-12-25 | 2018-05-18 | 深圳市英威腾电气股份有限公司 | A kind of automatic seeking frequency method for intermediate frequency power supply |
-
1994
- 1994-10-17 CN CN 94243108 patent/CN2208752Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054927A (en) * | 2017-12-25 | 2018-05-18 | 深圳市英威腾电气股份有限公司 | A kind of automatic seeking frequency method for intermediate frequency power supply |
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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 |