CN105763071A - High-precision medium-frequency power supply - Google Patents
High-precision medium-frequency power supply Download PDFInfo
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- CN105763071A CN105763071A CN201410760771.0A CN201410760771A CN105763071A CN 105763071 A CN105763071 A CN 105763071A CN 201410760771 A CN201410760771 A CN 201410760771A CN 105763071 A CN105763071 A CN 105763071A
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Abstract
According to a high-precision medium-frequency power supply, an integrated controller TL494 is adopted to generate pulse width modulation waveforms; a TLP250 drives a MOSFET to form a drive circuit; and after PWM signals obtained after driving are subjected to full bridge inversion and pass through a resonance tank circuit, the high-precision power supply capable of generating 10 kHz sinusoidal signals can be realized. The high-precision medium-frequency power supply comprises an input filter, a rectification and filtering circuit and an inverter circuit. The TL494 is adopted to serve as an output device of pulse width modulation, and the TLP250 is adopted to drive the MOSFET to form the drive circuit. The input filter is used for filtering clutter waves in a power grid, and meanwhile, hindering interference generated by an inverter power supply from being fed back to a public power grid; the rectification and filtering circuit is used for directly rectifying an power frequency power grid AC power supply into a smoother direct current for the next-stage conversion; and the inversion circuit enables the rectified direct current to be converted into a high-frequency rectangular wave alternating current.
Description
Technical field
The present invention relates to a kind of power supply, can produce frequency particularly to one is 10kHz, and output waveform is sinusoidal wave high-precision power.
Background technology
Intermediate frequency power supply is used to research transformation of electrical energy principle and converting means, and it utilizes semiconductor power device and Passive Power device, microprocessor and large scale integrated circuit, transformation theory, with power conversion circuit for core electric energy is converted and control.
Conventional intermediate frequency power supply generally comprises two links, namely extremely voltage stabilization part before, after extremely medium frequency inverter part, substantially adopt resolution element, though without traditional rotary part, but volume is still bigger, inefficient, structure is numerous and diverse, and unreliable factor is more, directly affects the reliability of equipment or even whole system.Want raising intermediate frequency power supply performance further, reduce volume it may first have to raising integrated level of reducing the link from circuit.For this, the converter technique of employing advanced person becomes only way.Highly reliable and high performance intermediate frequency power supply, is widely used in Aeronautics and Astronautics, naval vessel, locomotive, sensing heating and the equipment such as radar, communication switchboard.Therefore, the research of this type of power supply had significantly high engineering practical value.
Summary of the invention
It is an object of the invention to adopt and produced pulse-width modulation waveform by integrated manipulator TL494, design and drive MOSFET to form drive circuit with TLP250, by the pwm signal after driving through full-bridge inverting and resonant groove path, it is possible to create the high-precision power of the sinusoidal signal of 10kHz.
The object of the present invention is achieved like this:
The present invention includes input filter, rectification and filtering, inverter circuit.Wherein adopt TL494 as the follower of pulsewidth modulation, adopt TLP250 power drive MOS to form drive circuit.Wherein input filter: its effect is to filter the clutter that electrical network exists, also hinders interference feedback that inverter produces to public electric wire net simultaneously；Rectification and filtering: be smoother unidirectional current by direct for common frequency power network alternating current power supply rectification, convert for next stage；Inversion: the unidirectional current after rectification is become the alternating current of high frequency rectangular ripple.
Input filter: in Switching Power Supply, the diode current magnitude of voltage of rectifier switch diode is rapidly rising or falling, and the electric current of inductive drop electric capacity also changes rapidly.These performances all constituting electromagnetic interference source interference are output voltage waveforms distortion, input current has higher hamonic wave even space to have electromagenetic wave radiation to reduce interference, reduce the aberration rate of output supply voltage waveform, simultaneously, also do not destroy or disturb other electronic equipment using same power work, and, also can prevent the external electric equipment interference to Switching Power Supply, install inlet wire wave filter additional at ac power input end.
Input rectification circuit: in order to obtain direct current from alternating current power supply, need to utilize the rectification circuit being made up of rectifier cell.Here the mode of rectification circuit selects three-phase full wave rectifier circuit.Three-phase bridge rectifier circuit is mainly made up of six rectifying bridge arms, being divided into one group above two groups is odd number group, their negative electrode links together, for the positive pole of commutator output, and one group that anode is connected on tri-end points top and bottom of ABC respectively is even number set, and their anode is connected together, negative pole as commutator output, and negative electrode is connected on A respectively, B, on tri-end points of C.
Inverter circuit: key link is to be become the inverter circuit of exchange from direct current.Additionally, the effect of input filter is to lower DC terminal voltage pulse and absorb the reactive power of inversion load end in figure；The effect of output filter is the harmonic component lowering load terminal voltage, it is ensured that the waveform distortion of load voltage reaches designing requirement.
Accompanying drawing explanation
Fig. 1 is the hardware elementary diagram of the present invention；
Fig. 2 is the rectification circuit schematic diagram in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
It is the hardware elementary diagram of the present invention in conjunction with Fig. 1, Fig. 1.The present invention includes input filter, rectification and filtering, inverter circuit.Wherein adopt TL494 as the follower of pulsewidth modulation, adopt TLP250 power drive MOS to form drive circuit.Wherein input filter: its effect is to filter the clutter that electrical network exists, also hinders interference feedback that inverter produces to public electric wire net simultaneously；Rectification and filtering: be smoother unidirectional current by direct for common frequency power network alternating current power supply rectification, convert for next stage；Inversion: the unidirectional current after rectification is become the alternating current of high frequency rectangular ripple.
Input filter: in Switching Power Supply, the diode current magnitude of voltage of rectifier switch diode is rapidly rising or falling, and the electric current of inductive drop electric capacity also changes rapidly.These performances all constituting electromagnetic interference source interference are output voltage waveforms distortion, input current has higher hamonic wave even space to have electromagenetic wave radiation to reduce interference, reduce the aberration rate of output supply voltage waveform, simultaneously, also do not destroy or disturb other electronic equipment using same power work, and, also can prevent the external electric equipment interference to Switching Power Supply, install inlet wire wave filter additional at ac power input end.
In conjunction with the rectification circuit schematic diagram that Fig. 2, Fig. 2 are in the present invention.Input rectification circuit: in order to obtain direct current from alternating current power supply, need to utilize the rectification circuit being made up of rectifier cell.Here the mode of rectification circuit selects three-phase full wave rectifier circuit.Three-phase bridge rectifier circuit is mainly made up of six rectifying bridge arms, being divided into one group above two groups is odd number group, their negative electrode links together, for the positive pole of commutator output, and one group that anode is connected on tri-end points top and bottom of ABC respectively is even number set, and their anode is connected together, negative pole as commutator output, and negative electrode is connected on A respectively, B, on tri-end points of C.
Inverter circuit: key link is to be become the inverter circuit of exchange from direct current.Additionally, the effect of input filter is to lower DC terminal voltage pulse and absorb the reactive power of inversion load end in figure；The effect of output filter is the harmonic component lowering load terminal voltage, it is ensured that the waveform distortion of load voltage reaches designing requirement.
Claims (4)
1. high accuracy intermediate frequency power supply, is characterized in that the present invention includes input filter, rectification and filtering, inverter circuit；Wherein adopt TL494 as the follower of pulsewidth modulation, adopt TLP250 power drive MOS to form drive circuit；Wherein input filter: its effect is to filter the clutter that electrical network exists, also hinders interference feedback that inverter produces to public electric wire net simultaneously；Rectification and filtering: be smoother unidirectional current by direct for common frequency power network alternating current power supply rectification, convert for next stage；Inversion: the unidirectional current after rectification is become the alternating current of high frequency rectangular ripple.
2. high accuracy intermediate frequency power supply according to claim 1, is characterized in that input filter: in Switching Power Supply, and the diode current magnitude of voltage of rectifier switch diode is rapidly rising or falling, and the electric current of inductive drop electric capacity also changes rapidly；These performances all constituting electromagnetic interference source interference are output voltage waveforms distortion, input current has higher hamonic wave even space to have electromagenetic wave radiation to reduce interference, reduce the aberration rate of output supply voltage waveform, simultaneously, also do not destroy or disturb other electronic equipment using same power work, and, also can prevent the external electric equipment interference to Switching Power Supply, install inlet wire wave filter additional at ac power input end.
3. high accuracy intermediate frequency power supply according to claim 1, is characterized in that input rectification circuit: in order to obtain direct current from alternating current power supply, need to utilize the rectification circuit being made up of rectifier cell；Here the mode of rectification circuit selects three-phase full wave rectifier circuit；Three-phase bridge rectifier circuit is mainly made up of six rectifying bridge arms, being divided into one group above two groups is odd number group, their negative electrode links together, for the positive pole of commutator output, and one group that anode is connected on tri-end points top and bottom of ABC respectively is even number set, and their anode is connected together, negative pole as commutator output, and negative electrode is connected on A respectively, B, on tri-end points of C.
4. high accuracy intermediate frequency power supply according to claim 1, is characterized in that inverter circuit: key link is to be become the inverter circuit of exchange from direct current；Additionally, the effect of input filter is to lower DC terminal voltage pulse and absorb the reactive power of inversion load end in figure；The effect of output filter is the harmonic component lowering load terminal voltage, it is ensured that the waveform distortion of load voltage reaches designing requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760771.0A CN105763071A (en) | 2014-12-13 | 2014-12-13 | High-precision medium-frequency power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760771.0A CN105763071A (en) | 2014-12-13 | 2014-12-13 | High-precision medium-frequency power supply |
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| CN105763071A true CN105763071A (en) | 2016-07-13 |
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| CN201410760771.0A Pending CN105763071A (en) | 2014-12-13 | 2014-12-13 | High-precision medium-frequency power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515433A (en) * | 2015-12-27 | 2016-04-20 | 哈尔滨米米米业科技有限公司 | High-precision intermediate-frequency power source |
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2014
- 2014-12-13 CN CN201410760771.0A patent/CN105763071A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515433A (en) * | 2015-12-27 | 2016-04-20 | 哈尔滨米米米业科技有限公司 | High-precision intermediate-frequency power source |
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Application publication date: 20160713 |