CN219875527U - Motor drive circuit with filtering protection function and toilet drainage control device - Google Patents
Motor drive circuit with filtering protection function and toilet drainage control device Download PDFInfo
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- CN219875527U CN219875527U CN202321316524.2U CN202321316524U CN219875527U CN 219875527 U CN219875527 U CN 219875527U CN 202321316524 U CN202321316524 U CN 202321316524U CN 219875527 U CN219875527 U CN 219875527U
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- 238000001914 filtration Methods 0.000 title claims abstract description 38
- 230000002441 reversible effect Effects 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 41
- 230000008859 change Effects 0.000 abstract description 9
- 230000003116 impacting effect Effects 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003471 anti-radiation Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002829 reductive effect Effects 0.000 description 1
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Abstract
The utility model provides a motor drive circuit with a filtering protection function and a closestool drainage control device, which comprises the following components: the output end of the motor driving module is connected with the positive electrode and the negative electrode of the motor and used for controlling the driving motor to perform forward and reverse rotation; the output end of the control module is connected with the input end of the motor driving module and is used for sending an action signal to the motor driving module; the power supply module is used for supplying power to the motor driving module, the control module and the motor; and each output end of the motor driving module is connected with one end of the filtering module, and the other end of the filtering module is grounded and used for eliminating and inhibiting electromagnetic interference caused by motor operation and preventing voltage abrupt change from impacting the motor driving module.
Description
Technical Field
The utility model relates to the technical field of electricity, in particular to a motor driving circuit with a filtering protection function and a closestool drainage control device.
Background
Nowadays, dc motors are increasingly used, for example in bathroom products, and many functions are to be performed by the motor. The existing motor driving circuit is generally an H-bridge driving IC or an H-bridge circuit formed by using a separation device, and the output of the driving circuit is directly connected with a load coil, so that the forward and reverse rotation operation of a motor is controlled, and the motor driving circuit is used in different fields and occasions.
Although the general motor driving circuit can control the normal operation of the motor, the problems of electromagnetic radiation and chip output pin impulse voltage caused by the motor during operation cannot be ignored, other surrounding electrical appliances can be influenced generally, and the health of a human body can be damaged to a certain extent or the product is damaged.
The prior art generally adopts the following scheme:
1. the motor driving circuit output is directly connected with a motor load coil:
the output pin of the motor driving module is directly connected with the motor load coil, and after the control module sends a working signal to the driving circuit, the driving circuit controls the forward and reverse rotation of the motor. The working mode is unstable in output, is easy to impact the device and can generate electromagnetic radiation. See fig. 1.
2. And a filter circuit is added between output lines of the motor driving circuit:
the output pin of the motor driving module is directly connected with the motor load coil, but a filter circuit (such as a capacitor, a resistor, a capacitor and the like) is added between the output lines, the control module sends a control motor working signal to the driving circuit, and the driving circuit controls the forward and reverse rotation of the motor. The mode is easy to impact the device and has limited radiation protection effect. See fig. 2.
Disclosure of Invention
In order to solve the above problems, the present utility model provides a motor driving circuit with a filtering protection function and a toilet drainage control device, wherein a pair of filtering modules are arranged at each output end of the motor driving circuit to resist impact, so as to prevent impact of abrupt voltage change on the driving circuit, and to eliminate and inhibit electromagnetic interference caused by motor operation.
The utility model is realized by the following steps: a motor drive circuit with filtering and protection functions, comprising: the output end of the motor driving module is connected with the motor and used for controlling the motor to rotate forwards and backwards;
the output end of the control module is connected with the input end of the motor driving module and is used for sending an action signal to the motor driving module;
the power supply module is used for supplying power to the motor driving module, the control module and the motor;
and each output end of the motor driving module is connected with one end of the filtering module, and the other end of the filtering module is grounded and used for eliminating and inhibiting electromagnetic interference caused by motor operation and preventing voltage abrupt change from impacting the motor driving module.
Preferably, the filtering module comprises at least one capacitor, one end of the capacitor is connected with the output end of the motor driving module, and the other end of the capacitor is grounded.
Preferably, the filtering module further comprises at least one resistor, and the capacitor is connected with the output end of the motor driving module through the resistor.
Preferably, the filtering module further comprises at least one inductor, and the capacitor is connected with the output end of the motor driving module through the inductor.
Preferably, the motor driving module comprises at least one forward driving voltage output end and one reverse driving voltage output end, the forward driving voltage output end is connected with the positive electrode of the motor and connected with the negative electrode of the motor, the forward driving voltage output end is connected with a filtering module, and the reverse driving voltage output end is connected with a filtering module.
The utility model also provides a toilet drain control device, which comprises a drain device, and comprises the motor driving circuit with the filtering protection function, wherein the motor is used for driving the drain device to be opened or closed.
The utility model has the beneficial effects that: compared with the prior art, the motor driving circuit with the filtering and protecting functions has at least the following technical effects: 1. after the control module sends a working signal to the motor driving module, the motor driving module controls the forward and reverse rotation of the motor; through a group of grounding filter circuits on the output signal wire of the motor driving module, the impact of voltage abrupt change on the driving circuit during motor operation is prevented, electromagnetic interference caused by motor operation can be effectively eliminated and suppressed, and external radiation of the circuit is reduced. 2. The filter scheme of the resistor and the capacitor is adopted, so that the radiation protection effect is good, and the impact of voltage abrupt change on the driving circuit can be prevented by arranging the grounded capacitor so as to protect the devices of the circuit; in addition, when the capacitor is short-circuited and damaged, the resistor plays a role in limiting current, so that the driving circuit is not damaged or the risk of excessively high heating of electronic elements is not caused, and electromagnetic interference and radiation generated by the operation of the motor are effectively inhibited and eliminated.
Drawings
Fig. 1 is a schematic block diagram of a prior art motor drive circuit directly coupled to a motor load coil.
FIG. 2 is a schematic block diagram of a prior art filter circuit between output lines of a motor drive circuit
Fig. 3 is a schematic block diagram of a motor drive circuit with filtering and protection functions according to the present utility model.
Fig. 4 is a schematic circuit diagram of a motor drive circuit with filtering and protection functions according to the present utility model.
Detailed Description
The utility model will be further described with reference to the drawings and specific examples.
Referring to fig. 3 to 4, a motor driving circuit with filtering protection function includes:
the output end of the motor driving module is connected with the motor and used for controlling the motor to rotate forwards and backwards;
the output end of the control module is connected with the input end of the motor driving module and is used for sending an action signal to the motor driving module;
the power supply module is used for supplying power to the motor driving module, the control module and the motor;
and each output end of the motor driving module is connected with one end of the filtering module, and the other end of the filtering module is grounded and used for eliminating and inhibiting electromagnetic interference caused by motor operation and preventing voltage abrupt change from impacting the motor driving module. Because the output signal wire of the motor driving module is provided with a group of grounding filter circuits, electromagnetic interference caused by motor operation can be effectively eliminated and suppressed, and impact of voltage abrupt change on the driving circuit can be prevented.
Referring to fig. 3 to 4, preferably, the filtering module includes at least one capacitor, one end of the capacitor is connected to the output end of the motor driving module, and the other end of the capacitor is grounded. The capacitor plays a role in filtering, and impact of voltage abrupt change on a driving circuit can be prevented.
Referring to fig. 3 to 4, preferably, the filtering module further includes at least one resistor, and the capacitor is connected to the output terminal of the motor driving module through the resistor. The anti-radiation device has the advantages that a good anti-radiation effect can be achieved, when the capacitor is short-circuited and damaged, the resistor is used for limiting current, and the risk of damaging a driving circuit or causing excessive heating of electronic elements is avoided. The preferred resistor can be arranged only by one or a plurality of resistors which are connected in series, and then the series capacitor is grounded, so that the effects of filtering and current limiting can be achieved, and the impact of voltage abrupt change on a circuit can be prevented.
Referring to fig. 3 to 4, preferably, at least one capacitor is provided, one end of the capacitor is connected to the resistor, and the other end is grounded. The number of the preferred capacitors can be only one, and a plurality of capacitors can also be arranged, and more capacitors are connected in series and form a filter module with resistors in series.
Referring to fig. 3 to 4, preferably, the resistor may be replaced by an inductor, the inductor is connected between the capacitor and the output end of the motor driving module, the number of the inductor is not limited to one, and the plurality of inductors may be connected in series and then connected in series with the capacitor to be grounded.
Referring to fig. 4, preferably, the motor driving module includes a motor driving chip U1, where the motor driving chip U1 is provided with at least a forward driving voltage output end (8 pins) and a reverse driving voltage output end (6 pins), the forward driving voltage output end (8 pins) is connected with the positive pole (2 pins) of the load coil of the motor J1, the reverse driving voltage output end (6 pins) is connected with the negative pole (1 pins) of the load coil of the motor, the forward driving voltage output end is connected with a filtering module, and the reverse driving voltage output end is connected with a filtering module, where the filtering module is formed by connecting a resistor and two capacitors in series. The 8-pin of the motor driving chip U1 is connected with one end of a resistor R100, the other end of the resistor R100 is connected with one end of a capacitor C100, the other end of the capacitor C100 is grounded, the 6-pin of the motor driving chip U1 is connected with one end of a resistor R200, the other end of the resistor R200 is connected with one end of a capacitor C200, and the other end of the capacitor C200 is grounded; the anti-interference is filtered through the resistor R100 and the capacitor C100, so that voltage is prevented from striking the 8 pins of the motor driving chip U1; the anti-interference is filtered through the resistor R200 and the capacitor C200, so that voltage is prevented from striking the 6 pins of the motor driving chip U1; the 1 foot of the motor driving chip U1 is grounded, the 2 foot (input end) of the motor driving chip U1 is connected with the resistor R300 and then is connected with the motor reversal output end of the control module, the 3 foot of the motor driving chip U1 is connected with the resistor R301 and then is connected with the motor forward output end of the control module, the 4 foot of the motor driving chip U1 is connected with the resistor R302 and then is connected with the bias voltage, the 4 foot of the motor driving chip U1 is also connected with one end of the capacitor C300, the other end of the capacitor C300 is grounded, and the 5 foot of the motor driving chip U1 is connected with the power supply.
The utility model also provides a toilet drain control device, which comprises a drain device, and comprises the motor driving circuit with the filtering protection function, wherein the motor is used for driving the drain device to be opened or closed.
The utility model has the following working principle:
the filter module to the ground is added on each output pin of the motor driving module, the capacitor anti-interference is arranged on the output pins of the motor module through the filter scheme of the resistor and the capacitor, so that the impact of voltage mutation on the driving circuit is prevented, the circuit is protected, the resistor is further connected in series, and when the capacitor is damaged due to short circuit, the driving circuit is prevented from being damaged or the risk of excessively high heating of an electronic element is avoided due to the current limiting of the resistor, so that the protection effect is further enhanced. The good radiation protection effect is realized, and electromagnetic interference caused by motor operation can be effectively eliminated and suppressed.
The points to be described are: first, in the description of the present utility model, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed.
Secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design, so that the same embodiment and different embodiments of the present disclosure may be combined with each other without conflict.
Finally, the above description is only a preferred embodiment of the present utility model, and the scope of the present utility model is not limited to the above examples, but all technical solutions belonging to the concept of the present utility model are within the scope of the present utility model.
It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (6)
1. A motor drive circuit with a filter protection function, comprising:
the output end of the motor driving module is connected with the motor and used for controlling the motor to rotate forwards and backwards;
the output end of the control module is connected with the input end of the motor driving module and is used for sending an action signal to the motor driving module;
the power supply module is used for supplying power to the motor driving module, the control module and the motor;
and each output end of the motor driving module is connected with one filtering module, the output end of the motor driving module is connected with one end of the filtering module, and the other end of the filtering module is grounded.
2. A motor drive circuit with a filter protection function according to claim 1, characterized in that: the filtering module comprises at least one capacitor, one end of the capacitor is connected with the output end of the motor driving module, and the other end of the capacitor is grounded.
3. A motor drive circuit with a filter protection function according to claim 2, characterized in that: the filter module further comprises at least one resistor, and the capacitor is connected with the output end of the motor driving module through the resistor.
4. A motor drive circuit with a filter protection function according to claim 2, characterized in that: the filtering module further comprises at least one inductor, and the capacitor is connected with the output end of the motor driving module through the inductor.
5. A motor drive circuit with a filter protection function according to claim 1, characterized in that: the motor driving module is at least provided with a forward driving voltage output end and a reverse driving voltage output end, the forward driving voltage output end is connected with the positive electrode of the motor, the reverse driving voltage output end is connected with the negative electrode of the motor, the forward driving voltage output end is connected with the filtering module, and the reverse driving voltage output end is connected with the filtering module.
6. The utility model provides a toilet bowl drainage controlling means, includes drainage device, its characterized in that: a motor drive circuit with a filter protection function according to any one of claims 1-5, said motor being adapted to drive said drain to open or close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321316524.2U CN219875527U (en) | 2023-05-26 | 2023-05-26 | Motor drive circuit with filtering protection function and toilet drainage control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321316524.2U CN219875527U (en) | 2023-05-26 | 2023-05-26 | Motor drive circuit with filtering protection function and toilet drainage control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875527U true CN219875527U (en) | 2023-10-20 |
Family
ID=88335323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321316524.2U Active CN219875527U (en) | 2023-05-26 | 2023-05-26 | Motor drive circuit with filtering protection function and toilet drainage control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219875527U (en) |
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2023
- 2023-05-26 CN CN202321316524.2U patent/CN219875527U/en active Active
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