CN202818177U - Motor drive control circuit - Google Patents
Motor drive control circuit Download PDFInfo
- Publication number
- CN202818177U CN202818177U CN 201220397331 CN201220397331U CN202818177U CN 202818177 U CN202818177 U CN 202818177U CN 201220397331 CN201220397331 CN 201220397331 CN 201220397331 U CN201220397331 U CN 201220397331U CN 202818177 U CN202818177 U CN 202818177U
- Authority
- CN
- China
- Prior art keywords
- signal
- analog
- digital code
- digital
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
The utility model discloses a motor driver control circuit. The control circuit comprises an analog-to-digital control circuit, a plurality of digital code signal circuits and a digital-to-analog conversion circuit. The drive control circuit modulates and converts input analog signals into a plurality of digital code signals through an analog-to-digital conversion circuit, carries out logical combination on the plurality of digital code signals, outputs analog voltage signals through the digital-to-analog conversion circuit, and enables rising edges and falling edges of the analog voltage signals to change in a digital step manner, thereby reducing edge protrusion of the riding edges and the falling edges of drive signals effectively, enabling drive current to change slowly and stably, and greatly reducing vibration noises and audio noises produced by sudden changes in the drive signals.
Description
Technical field
The utility model relates to motor and drives control field, relates in particular a kind of motor driving control circuit.
Background technology
Drive control field at motor; in order to guarantee that driving signal can drive inductance coil efficiently, fast; thereby reduce significantly the vibrating noise, audio noise and the electromagnetic interference that are produced by the load of inductive switching motor coil, usually can adopt a kind of soft switch technique.Soft switch technique namely by increasing gradually or reduce gradually the electric current in the coil, so that electric current reaches maximum or minimum value, after electric current is in maximum or minimum state certain time, begins the process that changes round about gradually again.In the said process drive current rise and descend all milder, thereby realized the soft start that motor drives.
In the prior art, soft switch technique comprises restrict margin amplifying method and pulse-width modulation method.Fig. 1 is prior art restrict margin amplifying method conversion schematic diagram, referring to shown in Figure 1, the restrict margin amplifying method implementation procedure be with input signal Vin through the line style amplifier after, by the output of Vout end; Because input signal has certain amplitude, amplifier has certain operating voltage simultaneously, through the multiplication factor of linear amplifier rationally is set, so that amplifier enters the saturation region in the course of the work, thereby carries out amplitude limit to amplifying output signal Vout; Because the output signal Vout behind the amplitude limit has slowly rising edge, trailing edge slowly, when adopting output signal Vout drive motor coils, meeting is so that coil current slowly changes the realization soft switch technique.Fig. 2 is prior art pulse-width modulation method conversion schematic diagram, and referring to shown in Figure 2, the implementation procedure of pulse-width modulation method is that input signal Vin is carried out digital-to-analogue conversion and pulse-width modulation, is converted into the impulse wave of one group of different in width, by the output of Vout end; Pulse duration among the output impulse wave Vout is directly proportional with the amplitude of input signal Vin; Adopt output impulse wave Vout drive motor coils, the motor coil electric current slowly increases, slowly reduces, and realizes soft switch technique.
Come drive motor coils though soft switch technique of the prior art can be exported the drive current of slow variation to a certain extent, yet can't significantly reduce the vibration noise and the audio-frequency noise that are produced by the load of inductive switching motor coil.
The utility model content
In view of this, the utility model provides a kind of motor driving control circuit, to solve vibration noise that significantly reducing of can't realizing in the prior art produced by the load of inductive switching motor coil and the problem of audio-frequency noise.
For achieving the above object, the utility model provides following technical scheme:
A kind of motor driving control circuit comprises:
Be the analog to digital conversion circuit of a plurality of digital code signals with input analog signal modulation conversion;
Be connected with analog-digital conversion circuit as described, and a plurality of digital code signal circuits corresponding to described a plurality of digital code signal;
Respectively with analog-digital conversion circuit as described be connected the digital code signal circuit and be connected, described a plurality of digital code signals are merged into the D/A converting circuit of analog voltage signal.
Optionally, described D/A converting circuit comprises:
Described a plurality of digital code signals are carried out one or more NAND gate circuit with non-merging;
Be connected with described a plurality of NAND gate, the signal of described a plurality of NAND gate circuit output carried out or the OR-NOT circuit of non-merging;
Be connected two inverters of the series connection that the signal of described OR-NOT circuit output is isolated with described OR-NOT circuit;
Be connected with two inverters of described series connection, the signal of two inverters output of described series connection carried out the resistance of current limliting.
Optionally, described a plurality of digital code signal circuit comprises respectively:
Two inverters of the series connection that described a plurality of digital code signals are isolated;
Be connected the resistance of current limliting with two inverters of series connection.
Wherein, the frequency of described a plurality of digital code signals is identical with the frequency of described input analog signal.
Wherein, described input analog signal is sine wave signal.
Optionally, analog-digital conversion circuit as described is for can being to comprise that the digital code signal is in the high level district of high level state, comprises the analog to digital conversion circuit of digital code signal that at least one high level and at least one low level transition zone and digital code signal are in the low level district of low level state with described input analog signal conversion; The subregion of corresponding described sine wave signal ascent stage of described transition zone or descending branch, the waveform in the described subregion and the joining of transverse axis are the symmetric points of described waveform.
Optionally, also comprise:
Be connected the filter capacitor of the described analog voltage signal medium-high frequency of filtering signal with ground with described D/A converting circuit.
Via above-mentioned technical scheme as can be known, compared with prior art, the utility model openly provides a kind of motor driving control circuit, it is a plurality of digital code signals that described control circuit at first will be inputted the analog signal modulation conversion by analog to digital conversion circuit, and described a plurality of digital code signals are carried out logical combination, through D/A converting circuit output analog voltage signal, so that the rising edge of described analog voltage signal and trailing edge change in the mode of digital step, thereby effectively reduce the rising edge of driving signal and the edge protuberance of trailing edge, so that the slow smooth change of drive current reaches the vibrating noise and the audio noise that significantly reduce by driving the sign mutation generation.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is prior art restrict margin amplifying method conversion schematic diagram;
Fig. 2 is prior art pulse-width modulation method conversion schematic diagram;
Fig. 3 is the disclosed motor driving control circuit structure of the utility model embodiment connection diagram;
Fig. 4 is disclosed digital code signal circuit structure connection diagram embodiment illustrated in fig. 3;
Fig. 5 is disclosed D/A converting circuit structure connection diagram embodiment illustrated in fig. 3;
Fig. 6 is disclosed another motor driving control circuit structure connection diagram of the utility model embodiment;
Fig. 7 is the disclosed logical signal control of the utility model embodiment sequential chart;
Fig. 8 is disclosed another motor driving control circuit structure connection diagram of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment discloses a kind of motor driving control circuit, the vibration noise that is produced by the load of inductive switching motor coil with significantly reducing of realizing can't realizing in the prior art and the problem of audio-frequency noise.
Fig. 3 is the disclosed motor driving control circuit structure of the utility model embodiment connection diagram, and referring to shown in Figure 3, described Drive and Control Circuit can comprise:
The input analog signal modulation conversion that input Vin is inputted is the analog to digital conversion circuit 30 of a plurality of digital code signals.
Wherein, described input analog signal is sine wave signal, and the frequency of described a plurality of digital code signals is identical with the frequency of described input analog signal.
Analog-digital conversion circuit as described 30 can be to comprise that the digital code signal is in the high level district of high level state, comprises the analog to digital conversion circuit of digital code signal that at least one high level and at least one low level transition zone and digital code signal are in the low level district of low level state with described input analog signal conversion.
Wherein, because the digital code signal is identical with the frequency of described input analog signal, in order to guarantee that the level signal in high level district and the low level district can continue the regular hour, thereby assurance conversion efficiency, the subregion of corresponding described sine wave signal ascent stage of described transition zone or descending branch, the waveform in the described subregion and the joining of transverse axis are the symmetric points of described waveform.
Analog-digital conversion circuit as described 30 can arrange the required precision of described Drive and Control Circuit according to the user.Analog-digital conversion circuit as described 30 can be 1 number character code signal with input analog signal modulation conversion also; but consider actual conditions; the purpose that steadily slowly changes in order to reach the control electric current; usually input analog signal modulation conversion can be at least 2 number character code signals; for example will input analog signal conversion is 5 number character code signals, and this 5 number character code signal just has 2 so
5=32 kinds of combinations then will comprise 32 steps through rising edge and the trailing edge from the analog voltage signal of output end vo ut output behind the described driving change-over circuit; Also namely, the analog voltage signal of output reaches the peak of analog voltage signal from minimum 32 steps that evenly rise, and the analog voltage signal of output reaches the minimum of analog voltage signal from peak 32 steps that evenly descend.
Be connected with analog-digital conversion circuit as described, and a plurality of digital code signal circuits 31 corresponding to described a plurality of digital code signal.
Fig. 4 is disclosed digital code signal circuit structure connection diagram embodiment illustrated in fig. 3, and referring to shown in Figure 4, described digital code signal circuit 31 can comprise:
Described a plurality of digital code signals are carried out two inverter I of the series connection of isolation buffer.
Described inverter is used for the described digital code signal of isolation buffer, improves the driving force of digital code signal, reduces signal and disturbs.
Be connected the resistance R of current limliting with two inverters of series connection.
Respectively with analog-digital conversion circuit as described be connected the digital code signal circuit and be connected, described a plurality of digital code signals are merged into the D/A converting circuit 32 of analog voltage signal.
Fig. 5 is disclosed D/A converting circuit structure connection diagram embodiment illustrated in fig. 3, and referring to shown in Figure 5, a schematic structure of described D/A converting circuit 32 can comprise:
Described a plurality of digital code signals are carried out one or more NAND gate circuit M with non-merging.
Wherein, described one or more NAND gate M can be 2 input nand gates, can be 3 input nand gates, also can be other many input nand gates.
Be connected with described a plurality of NAND gate, the signal of described a plurality of NAND gate circuit output carried out or the OR-NOT circuit N of non-merging.
Described OR-NOT circuit N can be 2 input NOR gate, also can be other many input nand gates.
Be connected two inverter I of the series connection that the signal of described OR-NOT circuit output is isolated with described OR-NOT circuit.
Described inverter is used for isolation buffer through the output signal of described NAND gate circuit M and OR-NOT circuit N, improves the driving force of described output signal signal, reduces signal and disturbs.
Be connected with two inverters of described series connection, the signal of two inverters output of described series connection carried out the resistance R of current limliting.
Known by above-mentioned disclosed driving change-over circuit, the utility model is at first modulated and is changed the input analog signal, make it be converted to a plurality of digital code signals, then with described a plurality of digital code signal input D/A converting circuits, finally export analog voltage signal at output through conversion, it is the drive control signal of motor, the step that the rising edge of described drive control signal and trailing edge comprise is determined by the number of the digital code signal of changing out, the number of digital code signal is 4 as described, and that just has 2
4=16; If the number of described digital code signal is 6, so just have 2
6=64.
The below in conjunction with Fig. 6 and Fig. 7, introduces analog voltage signal, i.e. the production process of drive control signal 5 number character code signals to be arranged as example.Fig. 6 is disclosed another motor driving control circuit structure connection diagram of the utility model embodiment, can clearlyer get information about each included structure of the disclosed Drive and Control Circuit of the utility model referring to Fig. 6; Fig. 7 is the disclosed logical signal control of the utility model embodiment sequential chart, sees also Fig. 6 and Fig. 7 and understands following content.
With reference to shown in Figure 6, the input analog signal is by input Vin input analog-to-digital converter 60, modulation and conversion through described analog to digital converter 60, generate 5 number character code signals, be D1, D2, D3, D4 and D5, described 5 number character code signals consist of 5 number character code signal circuit 31 with two inverter I that connect and resistance R; Also has simultaneously one group of described 5 number character code signal at first through the logical combination of two NAND gate circuit M, again the output valve of described NAND gate circuit M is inputted OR-NOT circuit N, the output signal of OR-NOT circuit N is through two inverter I and the resistance R of series connection, form D/A converting circuit 32, in order to described 5 number character code signals are converted to analog voltage signal output, described analog voltage signal sends motor drive mechanism to as motor drive signal.
As seen from Figure 7, through the disclosed Drive and Control Circuit of the utility model, at first will input analog signal (sine wave of Fig. 7 the top) through analog-to-digital conversion, be converted to 5 number character code signals, because digital code only has 0 and 1, therefore 5 number character code signals just have 2
5Compound mode in=32, so with after the digital-to-analogue conversion of 5 number character code signals process, the rising edge of the analog voltage signal of output and trailing edge all comprise 32 steps, voltage signal slowly changes, and does not have the edge sudden change.The voltage rising value of each step equals ceiling voltage and deducts the value of minimum voltage divided by 32 values that obtain.
In order to guarantee conversion efficiency, the level signal in high level district and the low level district must continue the regular hour, and the time in high level district and low level district can be controlled by the cycle oscillator that circuit is set.Its derivation is as follows:
If in the analog voltage signal of output end vo ut output time corresponding to each step be Tstep the high level district the corresponding time be Thigh, the low level district is Tlow the corresponding time, and the cycle T vout of the analog voltage signal of the cycle T vin of input analog signal and output is identical, and the time T f that the time T r that 32 steps of rising edge are corresponding and 32 steps of trailing edge are corresponding equates.
Can get Tr=Tf=32*Tstep;
Tvin=Tvout=2*32*Tstep+Thigh+Tlow=2*（32*Tstep+Thigh）。
By above-mentioned derivation as can be known, in the fixing situation of input frequency analog signal, affect the high level district and the factor of low level district duration is Tstep, and Tstep is by decision cycle of oscillation of circuit.
Fig. 8 is disclosed another motor driving control circuit structure connection diagram of the utility model embodiment, referring to shown in Figure 8, in other embodiment, described Drive and Control Circuit is except analog to digital conversion circuit 30, a plurality of digital code signal circuit 31 and D/A converting circuit 32, can also comprise a filter capacitor C at output, described filter capacitor C is connected with ground with described D/A converting circuit, the high-frequency signal in the described analog voltage signal of filtering.
In the present embodiment, it is a plurality of digital code signals that described motor driving control circuit at first will be inputted the analog signal modulation conversion by analog to digital conversion circuit, and described a plurality of digital code signals are carried out logical combination, through D/A converting circuit output analog voltage signal, so that the rising edge of described analog voltage signal and trailing edge change in the mode of digital step, thereby effectively reduce the rising edge of driving signal and the edge protuberance of trailing edge, so that the slow smooth change of drive current reaches the vibrating noise and the audio noise that significantly reduce by driving the sign mutation generation.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a motor driving control circuit is characterized in that, comprising:
Be the analog to digital conversion circuit of a plurality of digital code signals with input analog signal modulation conversion;
Be connected with analog-digital conversion circuit as described, and a plurality of digital code signal circuits corresponding to described a plurality of digital code signal;
Respectively with analog-digital conversion circuit as described be connected the digital code signal circuit and be connected, described a plurality of digital code signals are merged into the D/A converting circuit of analog voltage signal.
2. control circuit according to claim 1 is characterized in that, described D/A converting circuit comprises:
Described a plurality of digital code signals are carried out one or more NAND gate circuit with non-merging;
Be connected with described a plurality of NAND gate, the signal of described a plurality of NAND gate circuit output carried out or the OR-NOT circuit of non-merging;
Be connected two inverters of the series connection that the signal of described OR-NOT circuit output is isolated with described OR-NOT circuit;
Be connected with two inverters of described series connection, the signal of two inverters output of described series connection carried out the resistance of current limliting.
3. control circuit according to claim 1 is characterized in that, described a plurality of digital code signal circuits comprise respectively:
Two inverters of the series connection that described a plurality of digital code signals are isolated;
Be connected the resistance of current limliting with two inverters of series connection.
4. control circuit according to claim 1 is characterized in that, the frequency of described a plurality of digital code signals is identical with the frequency of described input analog signal.
5. control circuit according to claim 1 is characterized in that, described input analog signal is sine wave signal.
6. control circuit according to claim 5, it is characterized in that analog-digital conversion circuit as described is for can being to comprise that the digital code signal is in the high level district of high level state, comprises the analog to digital conversion circuit of digital code signal that at least one high level and at least one low level transition zone and digital code signal are in the low level district of low level state with described input analog signal conversion; The subregion of corresponding described sine wave signal ascent stage of described transition zone or descending branch, the waveform in the described subregion and the joining of transverse axis are the symmetric points of described waveform.
7. control circuit according to claim 1 is characterized in that, also comprises:
Be connected the filter capacitor of the described analog voltage signal medium-high frequency of filtering signal with ground with described D/A converting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397331 CN202818177U (en) | 2012-08-10 | 2012-08-10 | Motor drive control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397331 CN202818177U (en) | 2012-08-10 | 2012-08-10 | Motor drive control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818177U true CN202818177U (en) | 2013-03-20 |
Family
ID=47876983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220397331 Expired - Lifetime CN202818177U (en) | 2012-08-10 | 2012-08-10 | Motor drive control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202818177U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856391A (en) * | 2017-01-24 | 2017-06-16 | 上海能埔电子有限公司 | A kind of self calibration Sofe Switch motor-driven system |
-
2012
- 2012-08-10 CN CN 201220397331 patent/CN202818177U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856391A (en) * | 2017-01-24 | 2017-06-16 | 上海能埔电子有限公司 | A kind of self calibration Sofe Switch motor-driven system |
| CN106856391B (en) * | 2017-01-24 | 2019-05-31 | 上海能埔电子有限公司 | A kind of self calibration Sofe Switch motor-driven system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2860866A1 (en) | Solar photovoltaic power conversion system and method of operating the same | |
| US8526640B2 (en) | Apparatus and method for switching audio amplification | |
| CN102412712A (en) | Compensation control circuit and method for direct current converter | |
| Soriano-Rangel et al. | An optimized switching strategy for a ripple-canceling boost converter | |
| CN107078725A (en) | The pulse density modulated D/A converter produced with triangular wave | |
| CN105356746A (en) | Conduction time generation circuit for power supply converter, and power supply converter | |
| CN105763032B (en) | Electronic device and its control method | |
| CN102811026B (en) | Class D audio power amplifier for noise suppression and audio signal processing method thereof | |
| CN111490695B (en) | Single-stage low-voltage stress switch capacitance type multi-level inverter topology structure and level modulation method | |
| CN101656473A (en) | PWM power supply inverter for improving dynamic reaction and control method thereof | |
| CN103780229B (en) | Capacitive load drive circuit and pulse excitation device | |
| US20140103897A1 (en) | Glitch suppression in dc-to-dc power conversion | |
| CN202818177U (en) | Motor drive control circuit | |
| CN103560654B (en) | Driving method of full bridge inverter and full bridge inverter | |
| CN100424994C (en) | Attenuation control for digital power converters | |
| Stempfle et al. | Adaptive closed‐loop state control system for a three‐level neutral‐point‐clamped Z‐source inverter | |
| CN202579259U (en) | Fan rotation speed control circuit with pulse width modulation (PWM) and temperature control functions | |
| CN201860297U (en) | Class D audio power amplifier system | |
| CN107277954A (en) | A kind of electromagnetic heating circuit and its control method | |
| CN104682679A (en) | Power converter, slope detection controller and method of slope detection controller | |
| CN103715866A (en) | Component parallel type frequency multiplier circuit used for random waveform power electronic converter | |
| Ali et al. | Sine carrier for fundamental fortification in three phase Z-source PWM inverters | |
| CN103051163B (en) | Output signal conversion equipment of pulse width modulation rectifier and electric locomotive | |
| CN101867312B (en) | Dual sine pulse width modulation (PWM) control method for Z-source inverter | |
| CN102968957B (en) | Light-emitting diode assembly, LED driving circuit and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210202 Address after: No. 1600, Zixing Road, Minhang District, Shanghai 200241 Patentee after: BCD (SHANGHAI) MICRO-ELECTRONICS Ltd. Address before: 200233 No. 800, Xuhui District, Shanghai, Yishan Road Patentee before: BCD Semiconductor Manufacturing Limited |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |
|
| CX01 | Expiry of patent term |