CN1567705A - Motor controller for controlling speed regulation in pulse width modulation - Google Patents
Motor controller for controlling speed regulation in pulse width modulation Download PDFInfo
- Publication number
- CN1567705A CN1567705A CNA031320244A CN03132024A CN1567705A CN 1567705 A CN1567705 A CN 1567705A CN A031320244 A CNA031320244 A CN A031320244A CN 03132024 A CN03132024 A CN 03132024A CN 1567705 A CN1567705 A CN 1567705A
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- pulse width
- width modulation
- control
- switching tube
- diode
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Abstract
The invention is a PWM speed regulation controlling electric machine controller, including a bridge rectifier circuit of rectify AC into pulsating DC, a sustained diode, a duty factor regulable control signal generator, and a switch tube, where the switch tube connects in serials with the sustained diode. The generated 2nd-40th harmonic components are smaller and have a small effect on the electric network, meeting the EMC (electro-magnetic compatibility) standard.
Description
Technical field
The present invention relates to a kind of speed setting controller of series excited machine.
Background technology
In the prior art, the speed governing of series excited machine all realizes by regulating the silicon controlled angle of flow, the silicon controlled angle of flow is avoided about the 85-95 degree as far as possible.There are two open defects in this speed-regulating scheme, and the firstth, when speed governing starter motor under higher-wattage is, fall produce transient voltage to excessive problem.The secondth, original alignment circuit still can cause triple-frequency harmonics to exceed standard, and is big to electric network pollution.
Summary of the invention
The object of the invention provides a kind of pulse width modulation controlled speed governing electric machine controller, and it can suppress secondary to four ten subharmonic effectively.
Technical scheme of the present invention is: a kind of pulse width modulation controlled speed governing electric machine controller, it comprises
A galvanic bridge rectifier that is used for AC rectification is become pulsation, this bridge rectifier has a pair of ac input end A, B and a pair of pulsating direct current output terminals A ', B ';
A sustained diode, the two ends of this diode D go out to hold E and E ' for the power supply that is in parallel with series excited machine M;
The control-signals generator X of an EDM Generator of Adjustable Duty Ratio;
A switching tube K, this switching tube K and diode D are in series, and the control utmost point of this switching tube K is connected on the signal output part of control-signals generator X;
Described diode D, and switching tube K be connected across the pulsating direct current output terminals A of described bridge rectifier after being in series ', between the B '.
Description of drawings
Accompanying drawing 1 is a circuit block diagram of the present invention;
Accompanying drawing 2 offers the AC power waveform figure at A, B two ends for civil power;
Accompanying drawing 3 be civil power after rectification, the power supply wave shape figure at A ', B ' two ends;
The control signal oscillogram that accompanying drawing 4 produces for control-signals generator X;
Accompanying drawing 5 is after control-signals generator copped wave control, the power supply wave shape figure at A ', B ' two ends;
Accompanying drawing 6 is after control-signals generator copped wave control, the voltage oscillogram at A, B two ends;
Accompanying drawing 7 is one embodiment of the present of invention circuit theory diagrams;
Embodiment
Referring to accompanying drawing 1 and accompanying drawing 7, a kind of pulse width modulation controlled speed governing electric machine controller, it comprises
A galvanic bridge rectifier that is used for AC rectification is become pulsation, this bridge rectifier is made up of diode D1-D4, have a pair of ac input end A, B and a pair of pulsating direct current output terminals A ', B ', the input voltage signal at A, B two ends as shown in Figure 2, the A ' after the rectification, B ' voltage signal are as shown in Figure 3.
A sustained diode, the two ends of this diode D go out to hold E and E ' for the power supply that is in parallel with series excited machine M.
The control-signals generator X of an EDM Generator of Adjustable Duty Ratio; As shown in Figure 7, this signal generator X comprises adjustable resistance W1, signal generator SG3525, light-coupled isolation parts L1, amplifier T1, T2, produce square-wave signal by IC1 chip (model is SG3525), also can produce signals such as triangular wave, sawtooth waveforms, trapezoidal wave, sequence square wave, for example the square-wave signal that produces of single-chip microcomputer etc. by other circuit.The signal frequency range of described control-signals generator X is 0 to 50 hertz, and perhaps the signal frequency range of described control-signals generator X is 2000 to 40000 hertz.By regulating the resistance of W1, the duty ratio that can regulate square-wave signal makes that the voltage effective value that is added in the motor M two ends is adjustable, thereby makes the rotating speed adjustable of motor M.Accompanying drawing 4 is the oscillogram of the square-wave signal of generation.
A switching tube K, switching tube K comprises turn-off SCR, power transistor, power field effect transistor, igbt etc., this switching tube K and diode D are in series, the control utmost point of this switching tube K is connected on the signal output part of control-signals generator X, by control-signals generator X the conducting of switching tube K is controlled; Described diode D, and switching tube K be connected across the pulsating direct current output terminals A of described bridge rectifier after being in series ', between the B '.Accompanying drawing 5 is for putting on the voltage signal at motor M two ends.
When measuring the present invention to the influencing of electrical network, the voltage waveform at A, B two ends carries out fourier decomposition as can be known by the waveform to this accompanying drawing 6 as shown in Figure 6, and two to 40 order harmonic components are less, influence to electrical network is little, meets the regulation of EMC (electromagnetic compatibility detection).
Claims (3)
1, a kind of pulse width modulation controlled speed governing electric machine controller, it is characterized in that: it comprises
A galvanic bridge rectifier that is used for AC rectification is become pulsation, this bridge rectifier has a pair of ac input end A, B and a pair of pulsating direct current output terminals A ', B ';
A sustained diode, the two ends of this diode D go out to hold E and E ' for the power supply that is in parallel with series excited machine M;
The control-signals generator X of an EDM Generator of Adjustable Duty Ratio;
A switching tube K, this switching tube K and diode D are in series, and the control utmost point of this switching tube K is connected on the signal output part of control-signals generator X;
Described diode D, and switching tube K be connected across the pulsating direct current output terminals A of described bridge rectifier after being in series ', between the B '.
2, pulse width modulation controlled speed governing electric machine controller according to claim 1 is characterized in that: the signal frequency range of described control-signals generator X is 0 to 50 hertz.
3, pulse width modulation controlled speed governing electric machine controller according to claim 1 is characterized in that: the signal frequency range of described control-signals generator X is 2000 to 40000 hertz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031320244A CN1567705A (en) | 2003-07-10 | 2003-07-10 | Motor controller for controlling speed regulation in pulse width modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031320244A CN1567705A (en) | 2003-07-10 | 2003-07-10 | Motor controller for controlling speed regulation in pulse width modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1567705A true CN1567705A (en) | 2005-01-19 |
Family
ID=34469847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031320244A Pending CN1567705A (en) | 2003-07-10 | 2003-07-10 | Motor controller for controlling speed regulation in pulse width modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1567705A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858985B (en) * | 2005-05-02 | 2011-07-13 | 罗伯特·博世有限公司 | Method for operating a power tool and power tool |
-
2003
- 2003-07-10 CN CNA031320244A patent/CN1567705A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858985B (en) * | 2005-05-02 | 2011-07-13 | 罗伯特·博世有限公司 | Method for operating a power tool and power tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |