CN112187140A - Motor control circuit - Google Patents
Motor control circuit Download PDFInfo
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- CN112187140A CN112187140A CN202011046934.0A CN202011046934A CN112187140A CN 112187140 A CN112187140 A CN 112187140A CN 202011046934 A CN202011046934 A CN 202011046934A CN 112187140 A CN112187140 A CN 112187140A
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- resistor
- motor
- operational amplifier
- switching tube
- sampling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The application provides a motor control circuit. Relate to circuit technical field, this motor control circuit includes: the input sampling module is used for sampling the input current process of the motor and sending the sampling result to the current analysis module; the current analysis module is used for receiving the sampling result, analyzing the sampling result, generating a control signal based on the analysis result and sending the control signal to the motor driving circuit; and the motor driving module is used for controlling the motor to rotate based on the control information. According to the embodiment of the invention, the input sampling module is used for sampling the input unit, the sampling result is sent to the current analysis module, the current analysis module is used for analyzing the current to obtain the control signal, the motor is driven and controlled based on the control signal, the input power supply is analyzed and then controlled, the influence of power supply fluctuation on the motor control can be effectively restrained, and the motor control is more intelligent.
Description
Technical Field
The application relates to the technical field of circuits, in particular to a motor control circuit.
Background
With the progress of science and technology, the application range of the motor is wider and wider, the function of the motor is larger and larger, and with the popularization of the use of the motor, the problem in the use of the motor also comes along.
In the existing motor control, a complex circuit is mostly adopted for the drive control of the motor, the control of the motor is not intelligent enough and timely enough, and the fluctuation of an input power supply cannot be adapted to, so that the circuit can be in failure or insensitive to use, and the improvement is continued.
Disclosure of Invention
The purpose of this application aims at solving at least one of above-mentioned technical defect, especially prior art to the control of motor intelligent inadequately, not timely technical defect inadequately.
In a first aspect, a motor control circuit is provided, the motor control circuit comprising:
the input sampling module is used for sampling the input current process of the motor and sending the sampling result to the current analysis module;
the current analysis module is used for receiving the sampling result, analyzing the sampling result, generating a control signal based on the analysis result and sending the control signal to the motor driving circuit;
and the motor driving module is used for controlling the motor to rotate based on the control information.
Optionally, the input sampling module includes:
the first voltage acquisition circuit comprises a first resistor, a second resistor, a first operational amplifier and a first capacitor, wherein the first resistor is connected to the negative terminal of the first operational amplifier, the second resistor is connected between the negative terminal and the output end of the first operational amplifier, and the first resistor and the negative terminal of the first operational amplifier are grounded through the first capacitor;
the positive terminal of the second operational amplifier is connected to the output end of the first operational amplifier through a fourth resistor and is connected to the first driving voltage through the third resistor; and the negative terminal of the second operational amplifier is connected with the output end.
Optionally, the input sampling module further includes:
the output protection single circuit comprises a first diode, a second diode and a first capacitor, wherein the anode of the first diode and the cathode of the second diode are connected to the output end of the second operational amplifier through a fifth resistor, the cathode of the first diode is connected with a second driving voltage, the anode of the second diode is grounded, and the first capacitor is connected in parallel to two ends of the second diode.
Optionally, the motor driving module includes:
the switching circuit comprises a first switching tube and a second switching tube, wherein the grids of the first switching tube and the second switching tube are connected and are connected to the current analysis module, the source electrode of the first switching tube is connected with a positive voltage, the source electrode of the second switching tube is grounded, and the drain electrode of the first switching tube is connected with the source electrode of the second switching tube;
and the driving output circuit comprises a first inductor and a second capacitor, wherein a first section of the first inductor is connected to the drain electrode of the first switching tube, and a second end of the first inductor is grounded through the second capacitor.
Optionally, the first operational amplifier and the second operational amplifier are F030 in model.
Optionally, the resistances of the first resistor, the second resistor, the third resistor, and the fourth resistor are 10k Ω.
Optionally, the resistance of the fifth resistor is 5k Ω.
According to the embodiment of the invention, the input sampling module is used for sampling the input unit, the sampling result is sent to the current analysis module, the current analysis module is used for analyzing the current to obtain the control signal, the motor is driven and controlled based on the control signal, the input power supply is analyzed and then controlled, the influence of power supply fluctuation on the motor control can be effectively restrained, and the motor control is more intelligent.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.
Fig. 1 is a schematic diagram of a motor control circuit according to an embodiment of the present disclosure;
fig. 2 is a sampling circuit diagram according to an embodiment of the present disclosure;
fig. 3 is a circuit diagram of a motor control circuit according to an embodiment of the present disclosure.
The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It should be understood that the drawings are schematic and that elements and features are not necessarily drawn to scale.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The application provides a motor control circuit, aims at solving prior art technical problem as above.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
The disclosed embodiment provides a motor control circuit, as shown in fig. 1, the motor control circuit includes:
the input sampling module 110 is used for sampling the input current process of the motor and sending the sampling result to the current analysis module;
the current analysis module 120 is configured to receive the sampling result, analyze the sampling result, generate a control signal based on the analysis result, and send the control signal to the motor driving circuit;
and a motor driving module 130 for controlling the motor to rotate based on the control information.
In the implementation of the present disclosure, the input sampling module 110 is configured to sample a current of a power supply of a motor and transmit the sampled current to the power analysis module, where the current analysis module may have a circuit configuration, or may be an existing control chip, such as an ARM, a CPU, and the like, and is configured to analyze the sampled current, obtain an analysis result, generate a control signal according to the analysis result, and transmit the control signal to the motor driving module, and the motor driving module is configured to control the motor to rotate based on the control information.
In an implementation of the present disclosure, the input sampling module includes:
the first voltage acquisition circuit comprises a first resistor, a second resistor, a first operational amplifier and a first capacitor, wherein the first resistor is connected to the negative terminal of the first operational amplifier, the second resistor is connected between the negative terminal and the output end of the first operational amplifier, and the first resistor and the negative terminal of the first operational amplifier are grounded through the first capacitor;
the positive terminal of the second operational amplifier is connected to the output end of the first operational amplifier through a fourth resistor and is connected to the first driving voltage through the third resistor; and the negative terminal of the second operational amplifier is connected with the output end.
Specifically, as shown in fig. 2, the first voltage acquisition circuit may be formed by a resistor R1, a resistor R2, a capacitor C1, and an operational amplifier U1, wherein one end of the resistor R1 is connected to a grid voltage input signal, the other end of the resistor R1 is connected to the inverting input terminal of the positive operational amplifier U1 of the capacitor C1, the negative electrode of the capacitor C1 is grounded and connected to the non-inverting input terminal of the operational amplifier U1, and the output terminal of the operational amplifier U1 is connected to the inverting input terminal of the operational amplifier U1 through the resistor R2. One end of the resistor R3 is connected with a boost voltage, and the other end is connected with the output end of the operational amplifier U1 through the resistor R2 and is connected with the first voltage acquisition circuit. The non-inverting input end of the operational amplifier U2 is connected with the R3, the inverting input end of the operational amplifier U2 is connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with the output protection circuit. Finally, an output protection circuit may be formed by a diode D1, a diode D2 and a capacitor C2, wherein a cathode of the diode is connected to a power voltage (3.3V), an anode of the diode D1 is connected to a cathode of the diode D2 and is connected to an output terminal of the operational amplifier U2 in the second voltage acquisition circuit through a resistor R5, an anode of the diode D2 is grounded, and the capacitor C2 is connected in parallel to two ends of the diode D2. In the specific implementation, the resistance value of the resistor R1 is 10K, the capacitance value of the capacitor C1 is 0.01uF, and the two form a filter circuit, so that the time constant of the filter unit circuit can be much smaller than the output frequency of the system, and thus the error can be ignored. In addition, the resistance values of the resistor R2, the resistor R3 and the resistor R4 are all 10K, and the resistance value of the resistor R5 is 1K. In addition, the operational amplifier U1 and the operational amplifier U2 preferably use an operational amplifier chip LF353, and the capacitance value of the capacitor C2 is also preferably 0.01uF, which functions to suppress interference. The resistor R1 also serves to suppress interference.
In the implementation of this disclosure, the motor drive module includes:
the switching circuit comprises a first switching tube and a second switching tube, wherein the grids of the first switching tube and the second switching tube are connected and are connected to the current analysis module, the source electrode of the first switching tube is connected with a positive voltage, the source electrode of the second switching tube is grounded, and the drain electrode of the first switching tube is connected with the source electrode of the second switching tube;
and the driving output circuit comprises a first inductor and a second capacitor, wherein a first section of the first inductor is connected to the drain electrode of the first switching tube, and a second end of the first inductor is grounded through the second capacitor.
As an embodiment of the present disclosure, as shown in fig. 3, the control signal output by the current analysis module is connected to the gate of the switching tube Q1 and the gate of the switching tube Q2; the source of the switch tube Q1 is connected with the positive voltage VDD, and the drain is connected with one end of the inductor L1; the drain electrode of the switching tube Q2 is connected with one end of the inductor L1, and the source electrode is grounded; the other end of the inductor L1 is connected with one end of a capacitor C1, and outputs voltage Vout for driving a direct current motor; the other end of the capacitor C1 is grounded; as an embodiment of the present disclosure, the notification signal output by the current analysis module is a square wave signal, and the driving of the motor is controlled by the square wave signal, so as to provide the driving drivability of the motor.
According to the embodiment of the invention, the input sampling module is used for sampling the input unit, the sampling result is sent to the current analysis module, the current analysis module is used for analyzing the current to obtain the control signal, the motor is driven and controlled based on the control signal, the input power supply is analyzed and then controlled, the influence of power supply fluctuation on the motor control can be effectively restrained, and the motor control is more intelligent.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention. The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other embodiments in which any combination of the features described above or their equivalents does not depart from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (7)
1. A motor control circuit, comprising:
the input sampling module is used for sampling the input current process of the motor and sending the sampling result to the current analysis module;
the current analysis module is used for receiving the sampling result, analyzing the sampling result, generating a control signal based on the analysis result and sending the control signal to the motor driving circuit;
and the motor driving module is used for controlling the motor to rotate based on the control information.
2. The motor control circuit of claim 1 wherein the input sampling module comprises:
the first voltage acquisition circuit comprises a first resistor, a second resistor, a first operational amplifier and a first capacitor, wherein the first resistor is connected to the negative terminal of the first operational amplifier, the second resistor is connected between the negative terminal and the output end of the first operational amplifier, and the first resistor and the negative terminal of the first operational amplifier are grounded through the first capacitor;
the positive terminal of the second operational amplifier is connected to the output end of the first operational amplifier through a fourth resistor and is connected to the first driving voltage through the third resistor; and the negative terminal of the second operational amplifier is connected with the output end.
3. The motor control circuit of claim 2 wherein the input sampling module further comprises:
the output protection circuit comprises a first diode, a second diode and a first capacitor, wherein the anode of the first diode and the cathode of the second diode are connected to the output end of the second operational amplifier through a fifth resistor, the cathode of the first diode is connected with a second driving voltage, the anode of the second diode is grounded, and the first capacitor is connected in parallel to two ends of the second diode.
4. The motor control circuit of claim 1, wherein the motor drive module comprises:
the switching circuit comprises a first switching tube and a second switching tube, wherein the grids of the first switching tube and the second switching tube are connected and are connected to the current analysis module, the source electrode of the first switching tube is connected with a positive voltage, the source electrode of the second switching tube is grounded, and the drain electrode of the first switching tube is connected with the source electrode of the second switching tube;
and the driving output circuit comprises a first inductor and a second capacitor, wherein a first section of the first inductor is connected to the drain electrode of the first switching tube, and a second end of the first inductor is grounded through the second capacitor.
5. The motor control circuit of claim 2 wherein said first operational amplifier and said second operational amplifier are of the type F030.
6. The motor control circuit of claim 2, wherein the first resistor, the second resistor, the third resistor, and the fourth resistor have a resistance of 10k Ω.
7. The motor control circuit of claim 3 wherein said fifth resistor has a resistance of 5k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011046934.0A CN112187140A (en) | 2020-09-29 | 2020-09-29 | Motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011046934.0A CN112187140A (en) | 2020-09-29 | 2020-09-29 | Motor control circuit |
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| Publication Number | Publication Date |
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| CN112187140A true CN112187140A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011046934.0A Pending CN112187140A (en) | 2020-09-29 | 2020-09-29 | Motor control circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2949017A1 (en) * | 1979-12-06 | 1981-06-11 | Danfoss A/S, 6430 Nordborg | ARRANGEMENT FOR CONTROLLING THE DRIVE AND BRAKE CURRENTS OF A BRUSHLESS DC MOTOR |
| CN201628762U (en) * | 2010-04-10 | 2010-11-10 | 河北创科电子科技有限公司 | Overall characteristic test system of DC power supply |
| CN202111650U (en) * | 2011-04-14 | 2012-01-11 | 江苏浩峰汽车附件有限公司 | Multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller |
| CN203278712U (en) * | 2013-03-05 | 2013-11-06 | 南京理工大学 | Novel large asynchronous motor soft starting intelligent control module |
| CN203608119U (en) * | 2013-12-05 | 2014-05-21 | 广西桂林宇川光电科技有限公司 | Switching circuit for driving DC motor and 3D printer nozzle control circuit |
| CN110701428A (en) * | 2019-10-12 | 2020-01-17 | 山东大学 | Built-in current closed-loop motor driver for pipeline detection robot |
-
2020
- 2020-09-29 CN CN202011046934.0A patent/CN112187140A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2949017A1 (en) * | 1979-12-06 | 1981-06-11 | Danfoss A/S, 6430 Nordborg | ARRANGEMENT FOR CONTROLLING THE DRIVE AND BRAKE CURRENTS OF A BRUSHLESS DC MOTOR |
| CN201628762U (en) * | 2010-04-10 | 2010-11-10 | 河北创科电子科技有限公司 | Overall characteristic test system of DC power supply |
| CN202111650U (en) * | 2011-04-14 | 2012-01-11 | 江苏浩峰汽车附件有限公司 | Multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller |
| CN203278712U (en) * | 2013-03-05 | 2013-11-06 | 南京理工大学 | Novel large asynchronous motor soft starting intelligent control module |
| CN203608119U (en) * | 2013-12-05 | 2014-05-21 | 广西桂林宇川光电科技有限公司 | Switching circuit for driving DC motor and 3D printer nozzle control circuit |
| CN110701428A (en) * | 2019-10-12 | 2020-01-17 | 山东大学 | Built-in current closed-loop motor driver for pipeline detection robot |
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Application publication date: 20210105 |