CN215420138U - Motor control circuit and shaver - Google Patents
Motor control circuit and shaver Download PDFInfo
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- CN215420138U CN215420138U CN202121775461.8U CN202121775461U CN215420138U CN 215420138 U CN215420138 U CN 215420138U CN 202121775461 U CN202121775461 U CN 202121775461U CN 215420138 U CN215420138 U CN 215420138U
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- shaver
- control unit
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Abstract
The utility model discloses a motor control circuit and a shaver, which are applied to the shaver and comprise a control unit, a drive circuit and a current detection circuit; the input end of the current detection circuit is used for being connected with a motor of the shaver to detect the current change of the motor so as to obtain a detection result, and the output end of the current detection circuit is connected with the input end of the control unit so as to feed back the detection result to the control unit; the output end of the control unit is connected with the input end of the driving circuit so as to adjust the driving signal generated by the driving circuit according to the detection result, and the output end of the driving circuit is used for being connected with the motor so as to drive the motor to adjust the working state according to the driving signal. The utility model can adjust the rotating speed of the motor according to the working state of the shaver, thereby reducing the power consumption of the shaver and improving the convenience of users in use.
Description
Technical Field
The utility model relates to the technical field of electric appliance control, in particular to a motor control circuit and a shaver.
Background
At present, most of shavers are electric, and a blade of the shaver is driven to rotate by an internal motor, so that the aim of shaving is fulfilled. The working process of the traditional shaver is that a user generally turns on a power switch to start the shaver, then the shaver is used for shaving, and after the shaver is started, the rotating speed of an internal motor of the shaver generally runs at a fixed rotating speed, namely, whether the user is shaving or not, the power consumption of the shaver and the noise caused by the rotation of the motor are the same, so that the shaver is enabled to keep higher power consumption when the user is not shaving, certain noise is brought at the same time, and poor experience is brought to the user.
SUMMERY OF THE UTILITY MODEL
The utility model provides a motor control circuit and a shaver, which can adjust the rotating speed of a motor according to the working state of the shaver, thereby reducing the power consumption and the noise of the shaver during use and improving the use experience of a user.
In a first aspect, the present invention provides a motor control circuit for a shaver, the motor control circuit comprising a control unit, a driving circuit and a current detection circuit;
the input end of the current detection circuit is used for being connected with a motor of the shaver to detect the current change of the motor so as to obtain a detection result, and the output end of the current detection circuit is connected with the input end of the control unit so as to feed back the detection result to the control unit;
the output end of the control unit is connected with the input end of the driving circuit so as to adjust the driving signal generated by the driving circuit according to the detection result, and the output end of the driving circuit is used for being connected with the motor so as to drive the motor to adjust the working state according to the driving signal.
Further, the current detection circuit comprises a current sampling circuit and an AD conversion circuit, an input end of the current sampling circuit is connected with an output end of the motor, an output end of the current sampling circuit is connected with an input end of the AD conversion circuit, and the current sampling circuit is used for collecting current of the motor;
and the output end of the AD conversion circuit is connected with the control unit.
Further, the current sampling circuit includes at least one standard resistor.
Further, the shaver charging management circuit further comprises a charging management circuit, the charging management circuit is connected with the control unit, and the control unit controls the charging state of the shaver through the charging management circuit.
Further, the shaver control device further comprises an LED lamp circuit, the LED lamp circuit is connected with the control unit and comprises at least 2 LED lamps, and the LED lamp circuit is used for indicating the charging state of the shaver.
Furthermore, the device also comprises a key control circuit, and the key control circuit is connected with the control unit.
Further, the control unit is an MCU.
Further, the MCU model is CMS8S6990-QFN 20.
In a second aspect, the present invention further provides a shaver, which includes a shaver head, a shaver body, a motor, and the motor control circuit of any one of the above, wherein the motor control circuit is connected to the motor to control the motor to operate.
Further, the motor is a PWM control motor, and the driving signal is a PWM signal.
According to the motor control circuit and the shaver provided by the utility model, the drive circuit is controlled by the control unit, the motor is driven to rotate by the drive circuit, meanwhile, the current during the rotation of the motor is detected by the current detection circuit, when the shaver is used for shaving, the current detected by the current detection circuit is larger, when the shaver is not used for shaving, the current detected by the current detection circuit is smaller, and the control unit timely grasps the working state of the shaver through the current detection circuit, so that the rotating speed of the motor is adjusted, further, when the shaver is not used, the rotating speed of the motor is controlled to be reduced, the power consumption and the noise are reduced, and the experience of a user in use is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a motor control circuit according to an embodiment of the present invention;
FIG. 2 is a partial circuit diagram of a control unit provided by an embodiment of the present invention;
fig. 3 and 4 are partial circuit diagrams of the charge management circuit according to the embodiment of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, 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 is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a block diagram of a motor control circuit 100 according to the present invention, which can adjust the rotation speed of a motor 200 according to the operating state of a shaver.
As shown in fig. 1, the motor control circuit 100 provided by the present invention includes a control unit 10, a driving circuit 20, and a current detection circuit 30; the input end of the current detection circuit 30 is used for being connected with the motor 200 of the shaver to detect the current change of the motor 200 to obtain a detection result, and the output end of the current detection circuit 30 is connected with the input end of the control unit 10 to feed back the detection result to the control unit 10;
the output end of the control unit 10 is connected to the input end of the driving circuit 20 to adjust the driving signal generated by the driving circuit 20 according to the detection result, and the output end of the driving circuit 20 is used to be connected to the motor 200 to drive the motor 200 to adjust the working state according to the driving signal
The output end of the control unit 10 is connected with the input end of the driving circuit 20, the output end of the driving circuit 20 is connected with the input end of the motor 200, and the driving circuit 20 is used for driving the motor 200 to work; the input end of the current detection circuit 30 is connected with the output end of the motor 200, and the output end of the current detection circuit 30 is connected with the input end of the control unit 10; the current detection circuit 30 detects a current change of the motor 200 to obtain a detection result, and feeds back the detection result to the control unit 10 to enable the control unit 10 to adjust the rotation speed of the motor 200 according to the detection result.
Specifically, the control unit 10 is used as a control center for controlling the whole shaver, and may be composed of a single chip microcomputer and related circuits, as shown in fig. 2, which are the single chip microcomputer and peripheral circuits of the single chip microcomputer in one embodiment, although other single chip microcomputers and other peripheral circuits may also be used, and are not limited herein. The driving circuit 20 is used for driving the motor 200 to rotate, and the motor 200 is used for driving the blade of the shaver to rotate so as to complete the shaving action. The input end of the current detection circuit 30 is connected to an output end of the motor 200, and is used for detecting a current change of the motor 200 when the motor 200 rotates, for example, when the shaver is shaving, since the blade contacts with a beard when shaving, and a certain resistance is generated, the current in the motor 200 is large because the required current is large, and when the shaver is not shaving, the blade idles under the driving of the motor 200, the required current is small, the current in the motor 200 is small at this time, the current change in the motor 200 can be detected by the current detection circuit 30, and the change is fed back to the control unit 10, so that the control unit 10 can adjust the rotation speed of the motor 200 according to the current change in the motor 200. For example, when the shaver is shaving, the rotation speed of the motor 200 is increased, and when the shaver is not shaving, the rotation speed of the motor 200 is decreased for the purpose of reducing power consumption and noise.
As a further embodiment, the current detection circuit 30 includes a current sampling circuit 31 and an AD conversion circuit 32, an input terminal of the current sampling circuit 31 is connected to an output terminal of the motor 200, an output terminal of the current sampling circuit 31 is connected to an input terminal of the AD conversion circuit 32, and the current sampling circuit 31 is configured to sample a current of the motor 200; an output terminal of the AD conversion circuit 32 is connected to the control unit 10.
The input end of the current sampling circuit 31 is connected to the motor 200 for collecting the current in the motor 200, so that the current change in the motor 200 can be detected in time, and the output end of the current sampling circuit 31 is connected to the input end of the AD conversion circuit 32. The AD conversion circuit 32 is configured to convert the analog signal into a digital signal and output the digital signal to the control unit 10, so that the control unit 10 can know the operating state of the shaver according to the digital signal. For example, the AD conversion circuit 32 may convert the voltage analog signal supplied from the current sampling circuit 31 into a digital signal and send the digital signal to the control unit 10, so that the control unit 10 can know the operating state of the shaver according to the voltage change.
As a further embodiment, the current sampling circuit 31 comprises at least one standard resistor.
The current sampling circuit 31 converts the current signal into a voltage signal through its internal resistor, and then sends the voltage signal to the AD conversion circuit 32.
As a further embodiment, a charging management circuit 50 is further included, the charging management circuit 50 is connected to the control unit 10, and the control unit 10 controls the charging state of the shaver through the charging management circuit 50.
The charging management circuit 50 is used for managing a charging state of the shaver, as shown in fig. 3 and 4, fig. 3 and 4 are partial circuit diagrams of the charging management circuit 50 provided in this embodiment, and may mainly include a charging management chip, an over-voltage and over-current protection chip, and other peripheral circuits. When the shaver is plugged in, the control unit 10 is informed by the charging management circuit 50 that charging is possible, so that the battery is charged by the control unit 10.
As a further embodiment, the shaver further comprises an LED lamp circuit 40, the LED lamp circuit 40 is connected to the control unit 10, and the LED lamp circuit 40 includes at least 2 LED lamps, and the LED lamp circuit 40 is used for indicating the charging state of the shaver.
The LED lamp circuit 40 is used for indicating a charging state of the shaver, and includes at least two LED lamps, such as a red LED lamp and a white LED lamp, wherein the red LED lamp is used for indicating a low or no power state of the shaver, the white LED lamp flashes during the charging process, and the white LED lamp is on for indicating that the shaver is fully charged.
As a further embodiment, a key control circuit 60 is further included, and the key control circuit 60 is connected to the control unit 10.
Wherein, the surface of the shaver is provided with a key which is connected with a key control circuit 60, and a user can control the switch state of the shaver by the key.
In a further embodiment, the control unit 10 is an MCU, and the model of the MCU is CMS8S6990-QFN 20.
The MCU is used as the control unit 10 to control the shaver, and specifically, the model thereof may be CMS8S6990-QFN20, and the specific structure thereof is shown in fig. 2.
The utility model also discloses a shaver, which comprises a shaver head, a shaver body and the motor control circuit 100 in any embodiment of the embodiments, wherein the motor control circuit 100 is connected with the motor 200 to control the motor 200 to work.
In a further embodiment, the motor 200 is a PWM-controlled motor, and the driving signal is a PWM signal.
The speed regulation precision of the PWM-controlled motor is high, and the control unit 10 can control the rotation speed of the PWM-controlled motor accurately through the PWM signal.
According to the utility model, on one hand, the control unit controls the driving circuit, so that the driving circuit drives the motor to rotate, on the other hand, the current sampling circuit collects the current of the motor in real time, so that the working state of the shaver can be monitored in real time, the AD conversion circuit converts the analog signal into the digital signal, so that the control unit identifies the digital signal, and further the control unit can adjust the rotating speed of the motor according to the working state of the shaver, so that when the shaver is in a non-shaving state, the rotating speed of the motor is reduced, the power consumption and the noise of the shaver are reduced, and the convenience in use is improved.
While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A motor control circuit for a shaving razor, comprising: a control unit, a drive circuit and a current detection circuit;
the input end of the current detection circuit is used for being connected with a motor of the shaver to detect the current change of the motor so as to obtain a detection result, and the output end of the current detection circuit is connected with the input end of the control unit so as to feed back the detection result to the control unit;
the output end of the control unit is connected with the input end of the driving circuit so as to adjust the driving signal generated by the driving circuit according to the detection result, and the output end of the driving circuit is used for being connected with the motor so as to drive the motor to adjust the working state according to the driving signal.
2. The motor control circuit according to claim 1, wherein the current detection circuit includes a current sampling circuit and an AD conversion circuit, an input terminal of the current sampling circuit is connected to an output terminal of the motor, an output terminal of the current sampling circuit is connected to an input terminal of the AD conversion circuit, and the current sampling circuit is configured to sample a current of the motor;
and the output end of the AD conversion circuit is connected with the control unit.
3. The motor control circuit of claim 2 wherein said current sampling circuit comprises at least one standard resistor.
4. The motor control circuit of claim 1, further comprising a charge management circuit, said charge management circuit being connected to said control unit, said control unit controlling a charge state of said shaver through said charge management circuit.
5. The motor control circuit of claim 4, further comprising an LED lamp circuit, said LED lamp circuit being connected to said control unit and said LED lamp circuit comprising at least 2 LED lamps, said LED lamp circuit for indicating a charge status of said shaver.
6. The motor control circuit of claim 1, further comprising a key control circuit, said key control circuit being connected to said control unit.
7. The motor control circuit of claim 1 wherein said control unit is an MCU.
8. The motor control circuit of claim 7 wherein the MCU model is CMS8S6990-QFN 20.
9. A shaver comprising a shaver head, a shaver body, a motor, and a motor control circuit as claimed in any one of claims 1 to 8, wherein the motor control circuit is connected to the motor to control the operation of the motor.
10. The razor of claim 9, wherein the motor is a PWM controlled motor and the drive signal is a PWM signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121775461.8U CN215420138U (en) | 2021-07-30 | 2021-07-30 | Motor control circuit and shaver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121775461.8U CN215420138U (en) | 2021-07-30 | 2021-07-30 | Motor control circuit and shaver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215420138U true CN215420138U (en) | 2022-01-04 |
Family
ID=79655315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121775461.8U Active CN215420138U (en) | 2021-07-30 | 2021-07-30 | Motor control circuit and shaver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215420138U (en) |
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2021
- 2021-07-30 CN CN202121775461.8U patent/CN215420138U/en active Active
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