CN1855692A - High speed sine pulse midth modification - Google Patents
High speed sine pulse midth modification Download PDFInfo
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- CN1855692A CN1855692A CNA2005100496417A CN200510049641A CN1855692A CN 1855692 A CN1855692 A CN 1855692A CN A2005100496417 A CNA2005100496417 A CN A2005100496417A CN 200510049641 A CN200510049641 A CN 200510049641A CN 1855692 A CN1855692 A CN 1855692A
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- high speed
- pulse
- midth
- modification
- modulation
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Abstract
The invention uses a dedicated DSP for controlling electric engine as an invert main control chip, and with the high speed calculation capacity, dedicated instruction and algorithm of the DSP implements high speed sine pulse width modulation (SPWM). It improves fitting degree of current sine wave being greatly increased, and reduces the harmonic loss of main shaft. Thereby, when the output frequency reaches 4000Hz, the switch frequency only needs 24 KHz such that the output current will have 12 wave heads in one period; thereby, the pulse numbers of output voltage are increased one times by using SPWM double sideband modulation.
Description
One, technical field
Patent of the present invention relates to a kind of high speed sine pulse midth modification of ultra-speed precise electricity main shaft drives power supply.
Two, background technology
The sinusoid pulse width modulation modulation is to export after direct voltage is cut into the not wide pulse of a series of constant amplitudes by power electronic technology, and the width of pulse changes by sinusoidal rule, and the current waveform that inductive like this motor load obtains is the sine wave of a simulation.
When sinusoid pulse width modulation modulation inversion, in order to obtain smoother output current wave, require to have at least in each sinusoidal period the umber of pulse more than 12, umber of pulse is many more certainly, and current waveform is just level and smooth more.When output frequency during up to 4000Hz, modulating frequency will arrive 48KHz at least, just each switch periods approximately has only 20 μ s, and so high switching speed not only can improve the switching loss of quick high power switch element greatly, has proposed high requirement also for the operational capability of control circuit.We need find one under the situation that does not increase switching speed, can increase the way of output voltage umber of pulse.
Pulse-width modulation can be divided into monolateral modulation and double-edge modulation.Monolateral modulation is an edge of fixed pulse, by changing another along coming the width of regulating impulse; And double-edge modulation is the middle separated time of fixed pulse, comes the width of regulating impulse by two edges that change pulse simultaneously.Obviously, double-edge modulation is bigger than the amount of calculation of monolateral modulation, but double-edge modulation has tangible advantage.
The switching frequency of 24KHz means that switch periods has only about 41 μ s, in the so short time, calculate three pulse durations of three phase inverter bridge, has only the computing capability of inversion main control chip just can accomplish.In order to save computing time, we make data table stores in program storage with the functional value of each sampled point in the sinusoidal period.Through programming meticulously, obtained more satisfactory output effect at last.
Three, summary of the invention
The purpose of patent of the present invention provides a kind of ultra-speed precise electricity main shaft drives power supply high speed sine pulse midth modification that is used for.It can significantly improve the sinusoidal degree of fitting of output current wave, reduces the harmonic loss of electric main shaft greatly.
For achieving the above object, the technical solution of patent of the present invention is: adopt the inversion main control chip of the special-purpose inversion main control chip of Electric Machine Control as this driving power, utilize the high-speed computation ability of inversion main control chip and inner special instruction and the algorithm that is used for Electric Machine Control thereof to realize high speed sine pulse midth modification.
The high speed sine pulse midth modification of the ultra-speed precise electricity main shaft drives power supply of patent of invention, the output voltage of driving power is back generation of mid-point voltage stack by two inverter bridge, the superimposed voltage waveform of double-edge modulation is complete symmetry in theory, but the superimposed voltage waveform positive-negative half-cycle of monolateral modulation be one fat one thin.And the symmetry of double-edge modulation can also make the pulse wave head number of superimposed voltage double, and the sinusoidal degree of fitting that this also will significantly improve output current wave reduces the harmonic loss of electric main shaft greatly.Thus, when output frequency reached the highest 4000Hz, as long as switching frequency was 24KHz, and just can make in the one-period of output current has 12 wave heads.We just make the umber of pulse of output voltage increase by one times with the way of sinusoid pulse width modulation modulation double-edge modulation like this.
Since patent disclosure of the present invention the high speed sine pulse midth modification of a kind of ultra-speed precise electricity main shaft drives power supply, make system have following advantage:
1, can significantly improve the sinusoidal degree of fitting of output current wave, reduce the harmonic loss of electric main shaft greatly.
2, the way with sinusoid pulse width modulation modulation double-edge modulation makes the umber of pulse of output voltage increase by one times.
3, the functional value of each sampled point in the sinusoidal period is made data table stores in program storage.Through programming, obtained more satisfactory output effect at last.
Such scheme can be used for all ultra-speed precise that uses high speed sine pulse midth modification electricity main shaft drives power supplys.
Embodiment to patent of the present invention is described in further detail below in conjunction with accompanying drawing.
Four, description of drawings
Fig. 1 is the formation schematic diagram of patent of the present invention in system.
Five, embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Embodiment: as shown in Figure 1, the ultra-speed precise electricity main shaft drives power supply that technology such as high speed sinusoid pulse width modulation modulation constitute.Ac-dc-ac inverter is a rectified three-phase circuit at input side, DC side parallel one group big capacity filter capacitor C, can improve the power factor of power supply so effectively, reduce infringement to electrical network.In order to limit the charging current of powered on moment to electric capacity, be provided with current-limiting resistance R, after charging finishes, will be connected in parallel on the relay adhesive of R both sides by control circuit, after this this current-limiting resistance R is just fallen no longer to work by short circuit.
Claims (1)
1, a kind of high speed sine pulse midth modification of ultra-speed precise electricity main shaft drives power supply, it is characterized in that: adopt the inversion main control chip of the special-purpose inversion main control chip of Electric Machine Control, utilize the high-speed computation ability of inversion main control chip and inner special instruction and the algorithm that is used for Electric Machine Control thereof to realize high speed sine pulse midth modification as this driving power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100496417A CN1855692A (en) | 2005-04-25 | 2005-04-25 | High speed sine pulse midth modification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100496417A CN1855692A (en) | 2005-04-25 | 2005-04-25 | High speed sine pulse midth modification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1855692A true CN1855692A (en) | 2006-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100496417A Pending CN1855692A (en) | 2005-04-25 | 2005-04-25 | High speed sine pulse midth modification |
Country Status (1)
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| CN (1) | CN1855692A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386758A (en) * | 2011-11-25 | 2012-03-21 | 绍兴文理学院 | Circuit for correcting dead time voltage distortion of numerical control machine spindle driving power supply |
| CN102398189A (en) * | 2011-11-25 | 2012-04-04 | 绍兴文理学院 | Driving power supply for quick approaching of cutter and machining workpiece |
| CN102581766A (en) * | 2012-03-21 | 2012-07-18 | 绍兴文理学院 | Quick approaching control circuit for processed workpieces and cutters |
| CN102581765A (en) * | 2012-03-21 | 2012-07-18 | 绍兴文理学院 | Method for quick approach of workpiece and tool |
| CN102801335A (en) * | 2012-08-17 | 2012-11-28 | 绍兴文理学院 | Thickened oil electric thermal recovery heating power supply |
| CN102801334A (en) * | 2012-08-17 | 2012-11-28 | 绍兴文理学院 | Thickened oil electric thermal recovery heating power supply with fault diagnosis and warning functions |
| CN104135210A (en) * | 2014-06-27 | 2014-11-05 | 正频企业股份有限公司 | SSSPWM (Symmetrically synchronized Sine Pulse Width Modulation) method and motor driving system using same |
| CN110091579A (en) * | 2018-01-30 | 2019-08-06 | 住友重机械工业株式会社 | DC-to-AC converter, roll-to-roll transportation system and motor control system |
-
2005
- 2005-04-25 CN CNA2005100496417A patent/CN1855692A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386758A (en) * | 2011-11-25 | 2012-03-21 | 绍兴文理学院 | Circuit for correcting dead time voltage distortion of numerical control machine spindle driving power supply |
| CN102398189A (en) * | 2011-11-25 | 2012-04-04 | 绍兴文理学院 | Driving power supply for quick approaching of cutter and machining workpiece |
| CN102581766A (en) * | 2012-03-21 | 2012-07-18 | 绍兴文理学院 | Quick approaching control circuit for processed workpieces and cutters |
| CN102581765A (en) * | 2012-03-21 | 2012-07-18 | 绍兴文理学院 | Method for quick approach of workpiece and tool |
| CN102801335A (en) * | 2012-08-17 | 2012-11-28 | 绍兴文理学院 | Thickened oil electric thermal recovery heating power supply |
| CN102801334A (en) * | 2012-08-17 | 2012-11-28 | 绍兴文理学院 | Thickened oil electric thermal recovery heating power supply with fault diagnosis and warning functions |
| CN104135210A (en) * | 2014-06-27 | 2014-11-05 | 正频企业股份有限公司 | SSSPWM (Symmetrically synchronized Sine Pulse Width Modulation) method and motor driving system using same |
| CN104135210B (en) * | 2014-06-27 | 2016-10-05 | 正频企业股份有限公司 | Holohedral symmetry synchronous mode string pulse width modulating method and the motor-driven system of application thereof |
| CN110091579A (en) * | 2018-01-30 | 2019-08-06 | 住友重机械工业株式会社 | DC-to-AC converter, roll-to-roll transportation system and motor control system |
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