CN103475286A - Stepping motor pulse width signal modulation circuit - Google Patents
Stepping motor pulse width signal modulation circuit Download PDFInfo
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- CN103475286A CN103475286A CN2013103764900A CN201310376490A CN103475286A CN 103475286 A CN103475286 A CN 103475286A CN 2013103764900 A CN2013103764900 A CN 2013103764900A CN 201310376490 A CN201310376490 A CN 201310376490A CN 103475286 A CN103475286 A CN 103475286A
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Abstract
The invention discloses a stepping motor pulse width signal modulation circuit. Detected motor current I_V is input into a driving signal modulation circuit and is amplified to acquire a DL signal; a digital/analog (D/A) circuit outputs a simulated sine-wave voltage signal I_XF so as to set a subdivision current value containing a phase relationship, the DL signal and the I_XF signal are connected to a reverse input end of an amplifier through a second resistor and a third resistor respectively, and a positive input end of the amplifier is connected with an analog ground; an output end of an amplifier N4B is fed back to the reverse input end through a capacitor and a fifth resistor which are connected in parallel, and the second resistance R2, the third resistance and the fifth resistance are selected, so that the amplifier outputs a level signal XF which changes along with the change of the motor current, and the signal XF is modulated by triangular waves so as to acquire a drive output signal.
Description
Technical field
The present invention relates to a kind of stepping motor pulse width signal modulation circuit, belong to the circuit engineering field.
Background technology
Pulse-width modulation (PWM) is method commonly used during stepping motor drive to be controlled, and adopts the pulse-width modulation integrated chip to complete the output pulse width modulation more, needs in application that signal processing circuit and pulse-width modulation are integrated to be coordinated.And drive for the stepping motor that has segmentation to require, complicated signal processing circuit to be arranged.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of stepping motor pulse width signal modulation circuit, avoids complicated signal processing circuit.
For solving the problems of the technologies described above, the invention provides a kind of stepping motor pulse width signal modulation circuit, it is characterized in that, the current of electric I_V detected is input to and drives in signal modulation circuit, obtain the DL signal through amplification; D/A circuit output analog sine voltage signal I_XF, for setting the segmentation current value containing phase relation, DL signal and I_XF signal are connected to respectively the reverse input end of amplifier by the second resistance, the 3rd resistance, and the positive input of amplifier connects in analog; The output of amplifier N4B through electric capacity in parallel, the 5th resistance feedback to reverse input end, by choosing the second resistance, the 3rd resistance and the 5th resistance value, after treatment, make amplifier output follow the level signal XF of current of electric size variation, signal XF obtains drive output signal by triangular modulation.
Current of electric I_V is input to the first amplifier positive input driven in signal modulation circuit, through amplification, obtains the DL signal; The first amplifier reverse input end connects in analog through earth resistance.
The DL signal is contrary with the I_XF signal phase.
Signal XF inputs to the comparator positive input, the triangular signal that comparator reverse input end input triangular wave generator circuit produces; The level signal XF of current of electric size variation is followed in described comparator output terminal output.
The beneficial effect that the present invention reaches: the present invention adopts the general-purpose operation amplifier to realize signal processing and pulse-width modulation (PWM), and cost is low, and circuit is easily debugged.Circuits System is closed-loop control, and the segmentation electric current is controlled, has and controls accurately, the characteristics of response time.
The accompanying drawing explanation
The schematic block circuit diagram that Fig. 1 is whole motor drive module;
Fig. 2 is driving signal modulation circuit figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples are only for technical scheme of the present invention more clearly is described, and can not limit the scope of the invention with this.
As shown in Figure 1, whole motor drive module circuit comprises the major parts such as Micro-processor MCV circuit, D/A circuit, triangular wave generator circuit, three-phase bridge drive circuit, phase current testing circuit, and above a plurality of circuit are all directly or indirectly for driving signal modulation circuit that necessary input resource is provided.
Originality of the present invention is mainly reflected in the design that drives signal modulation circuit, as shown in Figure 2.
The current of electric that the phase current testing circuit detects is I_V, and current of electric I_V is input to the driving signal modulation circuit, by resistance R 1, is connected to amplifier N4A positive input, through amplification, obtains signal DL.Amplifier N4A reverse input end meets AGND in analog through resistance R 9, and amplifier N4A positive input meets AGND in analog through capacitor C 1; Amplifier N4A output is connected to reverse input end through resistance R in parallel 4, capacitor C 4.
D/A circuit output analog sine voltage signal I_XF, for setting the segmentation current value containing phase relation.
Signal DL and the signal I_XF single spin-echo of the output of amplifier N4A output, signal DL and signal I_XF are connected to respectively the reverse input end of amplifier N4B by resistance R 2, resistance R 3, and the positive input of amplifier N4B meets AGND in analog.The output of amplifier N4B feeds back to reverse input end through capacitor C in parallel 2, resistance R 5, simultaneously, also is parallel with a branch road by resistance R 10 and capacitor C 6 series connection.By choosing suitable resistance R 2, R3, R5 value, after treatment, the level signal XF of current of electric size variation is followed in output, and signal XF inputs to comparator N5 positive input through resistance R 6, the triangular signal that comparator N5 reverse input end input triangular wave generator circuit produces.
Signal XF obtains drive output signal OUT by triangular modulation, and this PWM ripple is used for controlling the high and low end of three brachium pontis of bridge drive circuit, finally realizes that in three quadrants, electric current is also controlled by the sine-wave current variation of segmentation, completes the function that constant current drives.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. a stepping motor pulse width signal modulation circuit, is characterized in that, the current of electric I_V detected is input to and drives in signal modulation circuit, through amplification, obtains the DL signal; D/A circuit output analog sine voltage signal I_XF, for setting the segmentation current value containing phase relation, DL signal and I_XF signal are connected to respectively the reverse input end of amplifier by the second resistance, the 3rd resistance, and the positive input of amplifier connects in analog; The output of amplifier N4B through electric capacity in parallel, the 5th resistance feedback to reverse input end, by choosing the second resistance, the 3rd resistance and the 5th resistance value, after treatment, make amplifier output follow the level signal XF of current of electric size variation, signal XF obtains drive output signal by triangular modulation.
2. a kind of stepping motor pulse width signal modulation circuit according to claim 1, is characterized in that, current of electric I_V is input to the first amplifier positive input driven in signal modulation circuit, through amplification, obtains the DL signal; The first amplifier reverse input end connects in analog through earth resistance.
3. a kind of stepping motor pulse width signal modulation circuit according to claim 1, is characterized in that, the DL signal is contrary with the I_XF signal phase.
4. a kind of stepping motor pulse width signal modulation circuit according to claim 1, is characterized in that, signal XF inputs to the comparator positive input, the triangular signal that comparator reverse input end input triangular wave generator circuit produces; The level signal XF of current of electric size variation is followed in described comparator output terminal output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103764900A CN103475286A (en) | 2013-08-27 | 2013-08-27 | Stepping motor pulse width signal modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103764900A CN103475286A (en) | 2013-08-27 | 2013-08-27 | Stepping motor pulse width signal modulation circuit |
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| Publication Number | Publication Date |
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| CN103475286A true CN103475286A (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103764900A Pending CN103475286A (en) | 2013-08-27 | 2013-08-27 | Stepping motor pulse width signal modulation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278412A (en) * | 2015-10-30 | 2016-01-27 | 青岛海尔科技有限公司 | Gas stove stepless fire adjustment control method, device and gas stove |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146661A (en) * | 1996-06-06 | 1997-04-02 | 中国人民解放军第二炮兵工程学院 | High-precision fine stepping method and control system for step motor |
| JP2004215385A (en) * | 2002-12-27 | 2004-07-29 | Matsushita Electric Ind Co Ltd | Stepping motor driving device and stepping motor driving method |
| CN201490955U (en) * | 2009-09-09 | 2010-05-26 | 深圳市雷赛机电技术开发有限公司 | Two-phase step driver |
| CN201490954U (en) * | 2009-09-01 | 2010-05-26 | 深圳市雷赛机电技术开发有限公司 | Novel three-phase driver for stepping motor |
| CN202121539U (en) * | 2011-07-19 | 2012-01-18 | 南昌工程学院 | Constant frequency modulation subdivision driver for stepping motor |
-
2013
- 2013-08-27 CN CN2013103764900A patent/CN103475286A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146661A (en) * | 1996-06-06 | 1997-04-02 | 中国人民解放军第二炮兵工程学院 | High-precision fine stepping method and control system for step motor |
| JP2004215385A (en) * | 2002-12-27 | 2004-07-29 | Matsushita Electric Ind Co Ltd | Stepping motor driving device and stepping motor driving method |
| CN201490954U (en) * | 2009-09-01 | 2010-05-26 | 深圳市雷赛机电技术开发有限公司 | Novel three-phase driver for stepping motor |
| CN201490955U (en) * | 2009-09-09 | 2010-05-26 | 深圳市雷赛机电技术开发有限公司 | Two-phase step driver |
| CN202121539U (en) * | 2011-07-19 | 2012-01-18 | 南昌工程学院 | Constant frequency modulation subdivision driver for stepping motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278412A (en) * | 2015-10-30 | 2016-01-27 | 青岛海尔科技有限公司 | Gas stove stepless fire adjustment control method, device and gas stove |
| CN105278412B (en) * | 2015-10-30 | 2019-05-17 | 青岛海尔科技有限公司 | Control method, device and the gas-cooker of a kind of pair of stepless fire tuning of gas-cooker |
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Application publication date: 20131225 |
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| RJ01 | Rejection of invention patent application after publication |