CN211579904U - Controller for protecting electric tool - Google Patents
Controller for protecting electric tool Download PDFInfo
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- CN211579904U CN211579904U CN202020137131.5U CN202020137131U CN211579904U CN 211579904 U CN211579904 U CN 211579904U CN 202020137131 U CN202020137131 U CN 202020137131U CN 211579904 U CN211579904 U CN 211579904U
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Abstract
The utility model discloses a protection electric tool's controller, including power module, current control module, current feedback module, thermistor module, single chip microcomputer control module. The power supply module is connected with the current control module and provides working power. The current control module is connected with the current feedback module and the single chip microcomputer control module, and the single chip microcomputer control module is connected with the thermistor module; the utility model provides a simple structure is reasonable, installation convenient to use, can promote the controller of a protection electric tool of electric tool life-span and multiple protection.
Description
Technical Field
The utility model relates to an electric tool field, more specifically the theory that says so, it relates to a protection electric tool's controller.
Background
In recent years, the electric tool industry is rapidly developing, and the use population is more and more extensive, but with the rising of management cost, manufacturing cost, labor cost and the like, the competition of products is more and more day by day. Consumers always want to buy tools which are cheap, good and superior and are suitable for the consumers; it is always desirable to buy 1 tool for all work situations and work in different work environments and for a long service life, but often this is undesirable, and many companies take many methods and measures for this: promote motor power and performance, install temperature controller additional, soft start, rated current overload protection device etc. but these schemes can not be effective a lot of problems in solving the actual work, for example: 180 or even 230 cutting blades are arranged on a 125-degree angle grinder to work, and a motor with stronger performance can only generate a twicky drum in a short time; when the temperature controller is additionally arranged, the power supply of the motor is cut off but the motor can normally work only by long-time recovery when being overloaded, and the working efficiency is low; in conclusion, most professional manufacturers and professional tool developers develop and develop special products of the tools, and no ideal product exists so far.
Disclosure of Invention
The utility model overcomes prior art's is not enough, provides a simple structure is reasonable, installation convenient to use, can promote the electric tool life-span and multiple protection's a protection electric tool's controller.
The technical scheme of the utility model as follows:
a controller for protecting an electric tool comprises a power supply module, a current control module, a current feedback module, a thermistor module and a single chip microcomputer control module; the power module is connected with the current control module, the current control module is connected with the current feedback module and the single chip microcomputer control module, and the single chip microcomputer control module is connected with the thermistor module.
Further, the power module comprises a transformer T1, a bridge rectifier circuit D1, a polar capacitor C2, a capacitor C3, a polar capacitor C4, a capacitor C5 and a voltage stabilizing chip U2;
Further, the current control module comprises a fuse F1, a motor B1, a power switch OC1, a bidirectional diode Q1, a resistor R1, a capacitor C1, a resistor R2 and a resistor R3;
wherein, the both ends of resistance R2 are connected with current feedback module.
Further, the current feedback module comprises a capacitor C7, a resistor R6, a resistor R7, a resistor R8 and an amplifier U3A; pin 1 of the amplifier U3A is connected with one end of the resistor R8 and serves as a current output end, pin 2 of the amplifier U3A is connected with one end of the resistor R7, pin 3 of the amplifier U3A is connected with the other end of the resistor R8 and one end of the resistor R6, pin 4 of the amplifier U3A is connected with +5V, and pin 11 of the amplifier U3A is grounded; the other end of the resistor R6 and the other end of the resistor R7 are respectively connected with two ends of the capacitor C7, and two ends of the capacitor C7 are connected with the current control module.
Further, the thermistor module comprises a resistor R20, a thermistor NTC and a capacitor C19; one end of the resistor R20 is connected with +5V, the other end of the resistor R20 is connected with one end of the thermistor NTC and one end of the capacitor C19 together with the single-chip microcomputer control module, and the other end of the thermistor NTC and the other end of the capacitor C19 are connected with the ground together.
Compared with the prior art, the utility model the advantage lies in:
1. the utility model discloses a controller has the overvoltage protection function, then the corresponding rising of instrument operating current when operating voltage risees suddenly, and the operating voltage that the motor was supplied with in time corresponding adjustment is given to power module, current control module to the current signal feedback to make its normal work, corresponding life who has prolonged the motor.
2. The utility model discloses a controller has overcurrent protection function, and when the rated maximum current of the super instrument of operating current, single chip microcomputer control circuit then in time adjusts (reduces) the operating voltage who supplies with the motor, makes its motor speed slowly descend, and when work efficiency is low, when the user begins slowly to reduce when unloading some load the electric current, the operating voltage of motor is supplied with in the corresponding adjustment of controller (rising), makes its motor speed slowly rise until normal work. In the process, the motor is always in a running state (cannot be stopped or restarted), and the motor cannot work beyond the limit design for a long time, so that the service life of the motor is prolonged manyfold.
3. The utility model discloses a controller has the soft start function that voltage slowly rose, and motor speed slowly rose to rated speed through certain time from zero when the instrument started, finally maintains at rated speed, when avoiding the start to the influence and the individual injury of surrounding environment (especially when high-power and super large power start).
4. The utility model discloses a controller has excessive pressure, overcurrent protection does not shut down and restart function, has improved user's work efficiency greatly.
5. The utility model discloses a controller has the power-off protection function, therefore the instrument must restart the instrument in the course of the work just can move, work when cutting off the power supply because of external factors, and the instrument still is in running state to surrounding environment and people's injury when preventing to supply power suddenly.
6. The controller of the utility model is additionally provided with the thermistor to play the role of dual protection.
7. The controller of the utility model also has the advantages of standardizing the professional and rationality of the user in the use process.
Drawings
Fig. 1 is a schematic overall principle diagram of the present invention;
fig. 2 is a circuit diagram of the power module of the present invention;
fig. 3 is a circuit diagram of the current control module of the present invention;
fig. 4 is a circuit diagram of the current feedback module of the present invention;
fig. 5 is a circuit diagram of a thermistor module according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1 to 5, a controller for protecting an electric tool includes a power supply module, a current control module, a current feedback module, a thermistor module, and a single chip microcomputer control module. The power supply module is connected with the current control module and provides working power. The current control module is connected with the current feedback module and the single chip microcomputer control module, and the single chip microcomputer control module is connected with the thermistor module.
Specifically, the power supply module comprises a transformer T1, a bridge rectifier circuit D1, a polar capacitor C2, a capacitor C3, a polar capacitor C4, a capacitor C5 and a voltage stabilizing chip U2;
The current control module comprises a fuse F1, a motor B1, a power switch OC1, a bidirectional diode Q1, a resistor R1, a capacitor C1, a resistor R2 and a resistor R3;
wherein, the both ends of resistance R2 are connected with current feedback module.
The current feedback module comprises a capacitor C7, a resistor R6, a resistor R7, a resistor R8 and an amplifier U3A; pin 1 of the amplifier U3A is connected with one end of the resistor R8 and serves as a current output end, pin 2 of the amplifier U3A is connected with one end of the resistor R7, pin 3 of the amplifier U3A is connected with the other end of the resistor R8 and one end of the resistor R6, pin 4 of the amplifier U3A is connected with +5V, and pin 11 of the amplifier U3A is grounded; the other end of the resistor R6 and the other end of the resistor R7 are respectively connected with two ends of the capacitor C7, and two ends of the capacitor C7 are connected with the current control module.
The thermistor module comprises a resistor R20, a thermistor NTC and a capacitor C19; one end of the resistor R20 is connected with +5V, the other end of the resistor R20 is connected with one end of the thermistor NTC and one end of the capacitor C19 together with the single-chip microcomputer control module, and the other end of the thermistor NTC and the other end of the capacitor C19 are connected with the ground together.
When the power module is communicated with the current control module to work, the current passes through the fuse F1, the corresponding resistor and the corresponding capacitor to provide working power for the power module and the motor B1. When the current detected by the transformer T1 at the moment of starting the electric tool B1 is ignored, the bridge rectifier circuit D1 starts to detect after a delay of several seconds, because the current at the moment of starting is larger, misoperation is avoided, the current feedback module transmits the detected information to the single chip microcomputer control module, and the single chip microcomputer control module identifies and compares the information fed back by the current feedback module and then outputs the information to a corresponding load, so that the electric tool always works within a more reasonable load power range.
When the voltage suddenly rises during working, the current of the electric tool correspondingly rises, and the signal is fed back to the current feedback module to correspondingly adjust the working voltage supplied to the motor B1 in time, so that the motor B1 can normally work, and the service life of the motor B1 is correspondingly prolonged.
When the current exceeds the rated maximum current of the electric tool in work, the singlechip control module timely adjusts (reduces) the working voltage supplied to the motor B1 to enable the rotating speed of the motor B1 to slowly decrease until the working efficiency is low, a user can unload a part of load to enable the current to slowly decrease, and at the moment, the singlechip control module correspondingly adjusts (increases) the working voltage supplied to the motor B1 to enable the rotating speed of the motor B1 to slowly increase until the motor B1 normally works. In the process, the motor B1 is always in a running state (without stopping or restarting), and the motor B1 of the motor B1 can not be out of the limit design for a long time, so that the service life of the motor B1 is prolonged by times.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as the protection scope of the present invention.
Claims (5)
1. A controller for protecting a power tool, comprising: the device comprises a power supply module, a current control module, a current feedback module, a thermistor module and a single chip microcomputer control module; the power module is connected with the current control module, the current control module is connected with the current feedback module and the single chip microcomputer control module, and the single chip microcomputer control module is connected with the thermistor module.
2. The controller for protecting a power tool according to claim 1, wherein: the power supply module comprises a transformer T1, a bridge rectifier circuit D1, a polar capacitor C2, a capacitor C3, a polar capacitor C4, a capacitor C5 and a voltage stabilizing chip U2;
pin 1 of a voltage stabilizing chip U2 is connected with one end of a capacitor C3, the anode of a polar capacitor C2 and the connecting end 1 of a bridge rectifier circuit D1, pin 3 of the voltage stabilizing chip U2 is connected with the anode of the polar capacitor C4 and one end of a capacitor C5 together to be +5V, and pin 2 of the voltage stabilizing chip U2 is connected with the other end of the capacitor C3, the cathode of the polar capacitor C2, the connecting end 3 of the bridge rectifier circuit D1, the cathode of the polar capacitor C4 and the other end of the capacitor C5 to be grounded; the No. 2 connecting end and the No. 4 connecting end of the bridge rectifying circuit D1 are connected with two ends of the transformer T1, and the other two ends of the transformer T1 are connected with the current control module.
3. The controller for protecting a power tool according to claim 1, wherein: the current control module comprises a fuse F1, a motor B1, a power switch OC1, a bidirectional diode Q1, a resistor R1, a capacitor C1, a resistor R2 and a resistor R3;
pin 1 of a power switch OC1 is connected with one end of a resistor R3, the other end of a resistor R3 is connected with +5V, pin 2 of the power switch OC1 is connected with a single-chip microcomputer control module, pin 3 of the power switch OC1 is connected with one end of a capacitor C1 and the G end of a bidirectional diode Q1, the other end of the capacitor C1 is connected with the A2 end of the bidirectional diode Q1 and one end of a motor B1, the other end of the motor B1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with a power module, pin 4 of the power switch OC1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the A1 end of the bidirectional diode Q1 and one end of a fuse F1, and the other end of the fuse F1 is connected with the power;
wherein, the both ends of resistance R2 are connected with current feedback module.
4. The controller for protecting a power tool according to claim 1, wherein: the current feedback module comprises a capacitor C7, a resistor R6, a resistor R7, a resistor R8 and an amplifier U3A; pin 1 of the amplifier U3A is connected with one end of the resistor R8 and serves as a current output end, pin 2 of the amplifier U3A is connected with one end of the resistor R7, pin 3 of the amplifier U3A is connected with the other end of the resistor R8 and one end of the resistor R6, pin 4 of the amplifier U3A is connected with +5V, and pin 11 of the amplifier U3A is grounded; the other end of the resistor R6 and the other end of the resistor R7 are respectively connected with two ends of the capacitor C7, and two ends of the capacitor C7 are connected with the current control module.
5. The controller for protecting a power tool according to claim 1, wherein: the thermistor module comprises a resistor R20, a thermistor NTC and a capacitor C19; one end of the resistor R20 is connected with +5V, the other end of the resistor R20 is connected with one end of the thermistor NTC and one end of the capacitor C19 together with the single-chip microcomputer control module, and the other end of the thermistor NTC and the other end of the capacitor C19 are connected with the ground together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020137131.5U CN211579904U (en) | 2020-01-21 | 2020-01-21 | Controller for protecting electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020137131.5U CN211579904U (en) | 2020-01-21 | 2020-01-21 | Controller for protecting electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211579904U true CN211579904U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020137131.5U Active CN211579904U (en) | 2020-01-21 | 2020-01-21 | Controller for protecting electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211579904U (en) |
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2020
- 2020-01-21 CN CN202020137131.5U patent/CN211579904U/en active Active
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