CN212183113U - Electric tool controller with multiple protection - Google Patents
Electric tool controller with multiple protection Download PDFInfo
- Publication number
- CN212183113U CN212183113U CN202021148301.6U CN202021148301U CN212183113U CN 212183113 U CN212183113 U CN 212183113U CN 202021148301 U CN202021148301 U CN 202021148301U CN 212183113 U CN212183113 U CN 212183113U
- Authority
- CN
- China
- Prior art keywords
- circuit
- protection
- mcu
- power supply
- tool controller
- 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.)
- Active
Links
Images
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses an electric tool controller with multiple protection, which comprises an MCU control circuit, a motor drive power supply circuit, an MCU power supply circuit, a voltage detection circuit, a motor drive circuit, an overcurrent protection circuit, an overcurrent self-locking circuit, a locked rotor/short circuit protection circuit, a secondary short circuit protection circuit and a current conversion identification circuit; the MCU control circuit is respectively and electrically connected with the MCU power supply circuit, the voltage detection circuit, the motor drive circuit, the overcurrent protection circuit, the overcurrent self-locking circuit, the locked rotor/short circuit protection circuit and the current conversion identification circuit; the motor driving power supply circuit is electrically connected with the MCU power supply circuit; the motor driving circuit is electrically connected with the overcurrent self-locking circuit, the locked rotor/short circuit protection circuit and the secondary short circuit protection circuit respectively. The utility model discloses the life of electric tool controller has been prolonged effectively.
Description
Technical Field
The utility model relates to an electric tool technical field particularly, especially relates to an electric tool controller with multiple protection.
Background
With the development of science and technology and the progress of society, people are more and more common to the application of electric tools, and the electric tool controller is used as a core component of the electric tool and determines the service life of the electric tool. The existing electric tool controller is only provided with an overcurrent protection circuit and a short-circuit protection circuit, the short-circuit protection circuit is slow in response, and a battery pack can be mistakenly taken, so that the electric tool controller is damaged, and the service life of the electric tool is shortened. Therefore, in view of the defects of the above-mentioned solutions in actual manufacturing and implementation and use, the present invention provides an electric tool controller with multiple protection functions, which is modified and improved, and is based on the spirit and concept of the design, and is created by the assistance of professional knowledge and experience, and after many kinds of ingenuity and experiments, so as to solve the problem of prolonging the service life of the electric tool.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide an electric tool controller with multiple protection to solve the problem of prolonging the service life of the electric tool.
The utility model relates to an electric tool controller with multiple protection, which is used for an electric chain saw and an electric scissors and comprises an MCU control circuit, a motor drive power supply circuit, an MCU power supply circuit, a voltage detection circuit, a motor drive circuit, an overcurrent protection circuit, an overcurrent self-locking circuit, a locked rotor/short circuit protection circuit, a secondary short circuit protection circuit and a current conversion identification circuit; the MCU control circuit is respectively and electrically connected with the MCU power supply circuit, the voltage detection circuit, the motor drive circuit, the overcurrent protection circuit, the overcurrent self-locking circuit, the locked rotor/short circuit protection circuit and the current conversion identification circuit; the motor driving power supply circuit is electrically connected with the MCU power supply circuit; the motor driving circuit is electrically connected with the overcurrent self-locking circuit, the locked rotor/short circuit protection circuit and the secondary short circuit protection circuit respectively; the overcurrent protection circuit is electrically connected with the motor driving circuit and the overcurrent self-locking circuit respectively.
Preferably, the utility model relates to an electric tool controller with multiple protection further includes dormancy circuit, its respectively with MCU control circuit motor drive power supply circuit electrical connection.
Preferably, the utility model relates to an electric tool controller with multiple protection further includes battery package communication circuit, battery package communication circuit with MCU control circuit electrical connection.
Preferably, the utility model relates to an electric tool controller with multiple protection further includes control key circuit, control key circuit with MCU control circuit connects, control key circuit includes a plurality of switches.
Preferably, the MCU control circuit comprises an MCU, and an operational amplifier and a comparator are arranged in the MCU.
Preferably, the MCU model is CMS8M 1010.
Preferably, the overcurrent protection circuit includes a current detection resistor, and two ends of the current detection resistor are respectively connected with the operational amplifier of the MCU control circuit.
Preferably, the over-current self-locking circuit comprises two operational amplifiers.
Preferably, the motor driving power supply circuit reduces the voltage of the battery pack to a stable 15V direct current to supply power for the motor driving circuit.
Preferably, the MCU power supply circuit reduces the 15V direct current into 5V direct current through a voltage reduction chip, and the model of the voltage reduction chip is HT 7550-1.
The utility model relates to an electric tool controller with multiple protection can realize through following technical scheme:
the utility model relates to an electric tool controller with multiple protection, which detects whether the voltage of a battery pack is normal through a voltage detection circuit to carry out high-low voltage protection; overcurrent protection is carried out through the current conversion identification circuit, the overcurrent protection circuit and the overcurrent self-locking circuit; the motor is ensured to have short circuit or the locked rotor is ensured to protect the controller of the electric tool through the locked rotor/short circuit protection circuit; the response speed of short-circuit protection is improved through the secondary short-circuit protection circuit; the damage of the electric tool controller caused by the wrong battery pack of a user is prevented through the battery pack communication circuit; through foretell protection circuit, great improvement the life of electric tool controller to promote electric tool's live time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of the control connection of the electric tool controller with multiple protection of the present invention, which includes an MCU control circuit, a motor driving circuit, an overcurrent protection circuit, an overcurrent self-locking circuit, a locked rotor/short circuit protection circuit, a secondary short circuit protection circuit, a current conversion identification circuit, a battery pack communication circuit, a control key circuit, and an indicator light circuit;
fig. 2 is a schematic diagram of the connection of the voltage supply of the controller of the electric tool with multiple protection shown in fig. 1, which includes an MCU control circuit, a sleep circuit, a motor driving power supply circuit, an MCU power supply circuit and a voltage detection circuit;
FIG. 3 is a circuit diagram of the MCU control circuit, the indicator light circuit and the battery pack communication circuit of the electric tool controller with multiple protection of the present invention shown in FIG. 1;
fig. 4 is a circuit diagram of a sleep circuit, a motor driving power supply circuit, an MCU power supply circuit, and a voltage detection circuit of the electric tool controller with multiple protection according to the present invention shown in fig. 2;
fig. 5 is a circuit diagram of a motor driving circuit, an overcurrent protection circuit, and a secondary short circuit protection circuit of the electric tool controller with multiple protection according to the present invention shown in fig. 1;
fig. 6 is a circuit diagram of an overcurrent self-locking circuit and a locked-rotor/short-circuit protection circuit of the electric tool controller with multiple protection according to the present invention shown in fig. 1;
fig. 7 is a circuit diagram of a current conversion identification circuit and a control key circuit of the electric tool controller with multiple protection according to the present invention shown in fig. 1.
The following are marked in the figure: 11, an MCU control circuit; 12, a sleep circuit; 13, a motor drive power supply circuit; 14, an MCU power supply circuit; 15, a voltage detection circuit; 21, a motor drive circuit; 22, an overcurrent protection circuit; 23, an overcurrent self-locking circuit; 24, a locked rotor/short circuit protection circuit; 25, a secondary short-circuit protection circuit; 26, a current conversion identification circuit; 27, a battery pack communication circuit; 28, controlling the key circuit; and 29, indicating a lamp circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper" and "lower" are used for indicating the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific position, be constructed and operated in a specific position, and thus should not be construed as limiting the present invention.
Further, in the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, the electric tool controller with multiple protection of the present invention is mainly used for an electric chain saw and an electric scissors, and may include an MCU control circuit 11, a sleep circuit 12, a motor driving power supply circuit 13, an MCU power supply circuit 14, a voltage detection circuit 15, a motor driving circuit 21, an overcurrent protection circuit 22, an overcurrent self-locking circuit 23, a locked rotor/short circuit protection circuit 24, a secondary short circuit protection circuit 25, a current conversion identification circuit 26, a battery pack communication circuit 27, a control key circuit 28, and an indicator circuit 29; the MCU control circuit 11 is electrically connected to the sleep circuit 12, the MCU power supply circuit 14, the voltage detection circuit 15, the motor drive circuit 21, the overcurrent protection circuit 22, the overcurrent self-locking circuit 23, the locked rotor/short circuit protection circuit 24, the current conversion identification circuit 26, the battery pack communication circuit 27, the control key circuit 28, and the indicator light circuit 29, respectively; the motor driving power supply circuit 13 is electrically connected with the sleep circuit 12 and the MCU power supply circuit 14 respectively; the motor driving circuit 21 is electrically connected with the overcurrent self-locking circuit 23, the locked rotor/short circuit protection circuit 24 and the secondary short circuit protection circuit 25 respectively; the overcurrent protection circuit 22 is electrically connected with the motor drive circuit 21 and the overcurrent self-locking circuit 23 respectively.
Referring to fig. 3, the MCU control circuit 11 includes an MCU, which is a 24-pin chip; the MCU model is CMS8M1010, and an operational amplifier and a comparator are arranged in the MCU model, the operational amplifier is connected to the overcurrent protection circuit 22, and the comparator is connected to the locked rotor/short protection circuit 24.
Referring to fig. 4, the sleep circuit 12 is electrically connected to the MCU control circuit 11, and the MCU controls the on/off of the MOS transistor Q1 in the sleep circuit 12, so as to sleep the whole circuit and achieve zero loss after sleep. The motor driving power supply circuit 13 steps down the voltage of the battery pack to a stable 15V direct current to provide electric energy for the motor driving circuit 21. The MCU power supply circuit 14 is used for reducing the 15V direct current into 5V direct current through a voltage reduction chip, the model of the voltage reduction chip is HT7550-1, and the MCU power supply circuit 14 is used for providing working voltage for the MCU. The voltage detection circuit 15 is electrically connected with the MCU and the battery pack respectively, and detects whether the battery pack is overvoltage or low voltage.
Referring to fig. 5, the motor driving circuit 21 is electrically connected to the MCU control circuit 11, and the MCU control circuit 11 controls the motor driving circuit 21 to drive the motor to start working. The overcurrent protection circuit 22 is electrically connected to the motor drive circuit 21 and the MCU control circuit 11, the resistor RS1 of the overcurrent protection circuit 22 is a current detection resistor, and both ends of the current detection resistor are connected to the operational amplifier of the MCU control circuit 11, when the voltage across the resistor RS1 is amplified by the operational amplifier in the MCU control circuit 11, and the amplified voltage value is greater than a preset value, the MCU controls the motor drive circuit 21 to stop driving the motor, thereby protecting the motor drive circuit 21.
Referring to fig. 6, the over-current self-locking circuit 23 is electrically connected to the MCU control circuit 11 and the over-current protection circuit 22, and includes two operational amplifiers, the two operational amplifiers amplify the current of the resistor RS1, when the current passing through the resistor RS1 is amplified by the two operational amplifiers in the over-current self-locking circuit 23 and the voltage value is greater than the preset value, the MCU controls the motor driving circuit 21 to stop driving the motor, so as to protect the motor driving circuit 21; the current value of the over-current self-locking circuit 23 is greater than that of short-circuit protection, and is less than that of the over-current protection circuit 22; the overcurrent self-locking circuit 23 is used for protecting the motor driving circuit 21 when a short-circuit protection fuse is not fused after the MCU program fails due to overcurrent current. The locked-rotor/short-circuit protection circuit 24 is electrically connected to a comparator inside the MCU control circuit 11, and is used to determine whether the motor is locked-rotor or short-circuited.
Referring to fig. 5, the secondary short-circuit protection circuit 25 is electrically connected to the motor driving circuit 21 and includes a fuse, in this embodiment, the maximum working current of the fuse is 30A, and the secondary short-circuit protection circuit 25 improves the response speed of short-circuit protection.
Referring to fig. 7, a current conversion recognition circuit 26 is connected to the MCU control circuit 11, and operates different overcurrent protection values according to the number of externally inserted terminals; in this embodiment, the MCU control circuit 11 is provided with a plurality of overcurrent protection points, the MCU control circuit 11 operates the low current protection point when two P terminals of the electric scissors are inserted, and the MCU control circuit 11 operates the high current protection point when three P terminals of the electric chain saw are inserted. The control key circuit 28 is connected to the MCU control circuit 11, the control key circuit 28 includes a plurality of switches, in this embodiment, the control key circuit 28 includes 3 switches, the switch S1 controls the on/off operation, the switch S2 controls the rotation speed of the PWM output duty ratio control motor through the MCU, and the switch S3 controls the start and stop of the motor.
Referring to fig. 3, the battery pack communication circuit 27 is electrically connected to the MCU control circuit 11, the battery pack communication circuit 27 is used to match the MCU control circuit 11 and the battery pack, and the MCU control circuit 11 starts to operate only when the matched battery pack is inserted, so as to prevent the electric tool controller from being damaged by a user using a wrong battery pack. The indicating lamp circuit 29 is electrically connected with the MCU control circuit 11, the indicating lamp circuit 29 comprises a plurality of LED lamps, the LED lamps respectively display different colors, in the embodiment, the number of the LED lamps is three, the colors of the LED lamps are respectively green, yellow and red, and the LED lamps are used for indicating the electric quantity of the battery pack and giving a warning when the battery pack is abnormal.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An electric tool controller with multiple protection is used for an electric chain saw and an electric scissors and is characterized by comprising an MCU control circuit, a motor driving power supply circuit, an MCU power supply circuit, a voltage detection circuit, a motor driving circuit, an overcurrent protection circuit, an overcurrent self-locking circuit, a locked rotor/short circuit protection circuit, a secondary short circuit protection circuit and a current conversion identification circuit; the MCU control circuit is respectively and electrically connected with the MCU power supply circuit, the voltage detection circuit, the motor drive circuit, the overcurrent protection circuit, the overcurrent self-locking circuit, the locked rotor/short circuit protection circuit and the current conversion identification circuit; the motor driving power supply circuit is electrically connected with the MCU power supply circuit; the motor driving circuit is electrically connected with the overcurrent self-locking circuit, the locked rotor/short circuit protection circuit and the secondary short circuit protection circuit respectively; the overcurrent protection circuit is electrically connected with the motor driving circuit and the overcurrent self-locking circuit respectively.
2. The multi-protection power tool controller according to claim 1, further comprising a sleep circuit electrically connected to the MCU control circuit and the motor drive power supply circuit, respectively.
3. The multi-protection power tool controller according to claim 1, further comprising a battery pack communication circuit electrically connected to the MCU control circuit.
4. The power tool controller with multiple protections of claim 1, further comprising a control button circuit, said control button circuit being connected to said MCU control circuit, said control button circuit comprising a plurality of switches.
5. The power tool controller with multiple protections according to claim 1, wherein the MCU control circuit comprises an MCU, and an operational amplifier and a comparator are disposed inside the MCU.
6. The multi-protection power tool controller of claim 5, wherein the MCU model is CMS8M 1010.
7. The electric tool controller with multiple protections according to claim 5, wherein the over-current protection circuit comprises a current detection resistor, and two ends of the current detection resistor are respectively connected with the operational amplifier of the MCU control circuit.
8. The power tool controller with multiple protections of claim 7, wherein the over-current self-locking circuit comprises two operational amplifiers.
9. The power tool controller with multiple protections of any one of claims 1-8, wherein the motor drive power supply circuit steps down the voltage of the battery pack to a stable 15 vdc voltage to power the motor drive circuit.
10. The power tool controller with multiple protections according to any one of claims 1-8, wherein the MCU power supply circuit steps down the 15V dc to 5V dc via a step-down chip, the type of which is HT 7550-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021148301.6U CN212183113U (en) | 2020-06-19 | 2020-06-19 | Electric tool controller with multiple protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021148301.6U CN212183113U (en) | 2020-06-19 | 2020-06-19 | Electric tool controller with multiple protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212183113U true CN212183113U (en) | 2020-12-18 |
Family
ID=73761953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021148301.6U Active CN212183113U (en) | 2020-06-19 | 2020-06-19 | Electric tool controller with multiple protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212183113U (en) |
-
2020
- 2020-06-19 CN CN202021148301.6U patent/CN212183113U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1780867B1 (en) | Battery pack for cordless power tools | |
| JP4819037B2 (en) | Cordless power tool with tool identification circuit | |
| TWM576750U (en) | Electrical composition, electric device system, battery pack, electric motor, motor assembly and electric motor assembly | |
| US10418919B2 (en) | Electric tool and motor drive system | |
| JP2008236878A (en) | Charging device | |
| EP1759257A2 (en) | Methods for electrically isolating a portable electrically-operated device and converter module for portable electrically-operated device | |
| CN212183113U (en) | Electric tool controller with multiple protection | |
| JP2009519694A (en) | Electronic circuits for small electronic devices | |
| JP3371152B2 (en) | Battery pack | |
| CN114362342B (en) | Electric tool system and battery pack thereof | |
| EP3264515B1 (en) | Smart battery jumper cable | |
| JP4012081B2 (en) | Light source lighting circuit and lighting display device having the same | |
| JP2011205866A (en) | Power supply circuit, and power supply apparatus | |
| CN213754360U (en) | Controller is cut to cable with multiple protection | |
| JP7323245B1 (en) | Disconnection detector | |
| JP2020058124A (en) | Battery pack | |
| CN214755684U (en) | Charging protection and control circuit | |
| CN212968346U (en) | Overcurrent alarm function socket for operating room | |
| CN219512528U (en) | Control circuit and electrical equipment | |
| CN214959336U (en) | Motor starting circuit | |
| JPWO2019003741A1 (en) | Electric tool | |
| CN210867176U (en) | Protection circuit for preventing motor stalling | |
| CN221227136U (en) | Current-limiting short-circuit prevention module | |
| US20040119438A1 (en) | Battery-supplied alternator | |
| CN220139260U (en) | Battery management system integrating battery protection and motor driving |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |