CN218771840U - Motor protection circuit using motor driving chip - Google Patents
Motor protection circuit using motor driving chip Download PDFInfo
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- CN218771840U CN218771840U CN202221279151.1U CN202221279151U CN218771840U CN 218771840 U CN218771840 U CN 218771840U CN 202221279151 U CN202221279151 U CN 202221279151U CN 218771840 U CN218771840 U CN 218771840U
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Abstract
The utility model discloses a motor protection circuit using a motor driving chip, which relates to the field of motor protection circuits and comprises a motor M + end circuit, a motor M-end circuit, a driving chip connecting circuit and an external power supply circuit; the electromotive force generated by the motor at two ends of the motor electrode and pushed by the mechanical transmission structure is output to the power supply end of the motor driving chip through the diode rectifying circuit to provide voltage, so that the motor driving chip cannot be damaged due to the fact that the power supply end of the chip is not electrified and the motor control end of the chip is electrified, and when the electromotive force is lower than a preset protection voltage, an external power supply end supplies power to the power supply end of the motor driving chip through a field effect tube Q6 and a diode D5; when the electromotive force exceeds the preset protection voltage, the triodes Q1 and Q4 are conducted, the triodes Q5 and Q3 are opened, the field effect tube Q6 is turned off, the resistor R1 and the triode Q2 form a discharge loop to be conducted, the motor is pushed by the mechanical transmission structure, and the electromotive force output from the two ends of the motor electrode is discharged.
Description
Technical Field
The utility model relates to a motor protection circuit technical field especially relates to an use motor drive chip's motor protection circuit.
Background
In order to effectively protect the chip and the driven motor under extreme conditions, the protection circuit has five self-protection and detection functions of power supply under-voltage protection, drive current limitation, high-temperature early warning and protection, current sampling and power supply short-circuit protection. The protection circuit enables the chip to stably drive the motor and related equipment, and can effectively protect the chip to be safe and prolong the service life. The research of the chip protection circuit has important significance for improving the quality of the chip and perfecting the function of the chip.
The motor protection circuit of the existing motor driving chip on the market is mostly subjected to voltage limiting and current limiting treatment, but the motor driving chip is provided with a current limiting element; the voltage limiting circuit is mostly complex, and the existing protection circuit pushes a motor to generate overhigh electromotive force through a mechanical transmission structure, so that circuit elements are damaged. Therefore, the motor protection circuit of the simple motor driving chip is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the existing motor is pushed to generate overhigh electromotive force through a mechanical transmission structure in the prior art, thereby leading to the damage of circuit elements, and providing a motor protection circuit using a motor driving chip.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a motor protection circuit using a motor driving chip, comprising: motor M + holds circuit, motor M-holds circuit, driver chip connecting circuit and external supply circuit, motor M + holds circuit and driver chip connecting circuit electric connection, motor M-holds circuit and driver chip connecting circuit electric connection, driver chip connecting circuit respectively with motor M + holds circuit electric property and motor M-holds circuit electric connection.
Preferably, the motor M + side circuit includes a motor M + side, a diode D1, a diode D2, a resistor R1, a resistor R3, a resistor R6, a resistor R9, and a power supply terminal of a driving chip, the motor M + side is connected to an anode of the diode D1 and a cathode of the diode D2, a cathode of the diode D1 is connected to one end of the resistor R1, one end of the resistor R3, and the power supply terminal of the driving chip, another end of the resistor R3 is connected to one end of the resistor R9 and one end of the resistor R6, and another end of the resistor R9 is grounded.
Preferably, the motor M-end circuit comprises a motor M-end, a diode D3 and a diode D4; the motor M-end is connected with the anode of the diode D4 and the cathode of the diode D3, the anode of the diode D2 is connected with the anode of the diode D3, the anode of the diode D2 is grounded, the cathode of the diode D1 is connected with the cathode of the diode D4, one end of the resistor R1 and one end of the resistor R3, and the cathode of the diode D1 is connected with the power supply end of the driving chip.
Preferably, the driving chip connection circuit includes a resistor R2, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q4, and a capacitor C1; the other end of the resistor R5 is connected with the base electrode of the triode Q4, the collector electrode of the triode D4 is grounded, the emitter electrode of the triode Q4 is connected with one end of the resistor R2 and one end of the resistor R8, the other end of the eighth resistor R8 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is grounded, the emitter electrode of the triode Q3 is connected with one end of the resistor R4, one end of the resistor R7 and one end of the capacitor C1, the other ends of the resistor R2 and the resistor R4 are connected with the power supply end of the driving chip, the other end of the capacitor C1 is grounded, the other end of the resistor R7 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is grounded, the emitter electrode of the triode Q2 is connected with the other end of the resistor R1, the other end of the resistor R6 is connected with the base electrode of the triode Q1, and the collector electrode of the triode Q1 is grounded.
Preferably, the external power supply circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a diode D5, a triode Q5, a field effect transistor Q6 and an external power supply terminal; an emitting electrode of the triode Q1 is connected with one end of the resistor R10 and one end of the resistor R14, the other end of the resistor R14 is connected with a base electrode of the triode Q5, a collecting electrode of the triode Q5 is grounded, an emitting electrode of the triode Q5 is connected with one end of the resistor R11 and one end of the resistor R13, the other end of the resistor R13 and one end of the resistor R12 are connected with a grid electrode of the field-effect tube Q6, a drain electrode of the field-effect tube Q6 is connected with an anode of the diode D5, the other end of the resistor R10 and the other end of the resistor R11 are connected with the other end of the resistor R12, a source electrode of the field-effect tube Q6 and the external power supply end, and a cathode of the diode D5 is connected with a power supply end of a driving chip.
Preferably, the model of the field effect transistor is SI2319, the model of the capacitor is a 0.1uF capacitor, and the model of the diode is SS310.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a diode rectifier circuit will promote the electromotive force that the motor produced at the electrode both ends of motor through mechanical transmission structure, output and provide voltage for the motor drive chip power end, make the motor drive chip can not damage the motor drive chip because the chip power end electroless and chip motor control end has the electricity, when the electromotive force is less than predetermined guard voltage, triode Q1 and Q4 switch on, triode Q5 and Q3 switch on, field effect transistor Q6 switches on, triode Q2 switches off, the power supply is supplied for the motor drive chip power end through field effect transistor Q6 and diode D5 to the outside power end; when the electromotive force exceeds the preset protection voltage, the triodes Q1 and Q4 are conducted, the triodes Q5 and Q3 are opened, the field effect tube Q6 is turned off, the discharge loop formed by the resistor R1 and the triode Q2 is conducted, the motor is pushed by the mechanical transmission structure, and the electromotive force output from the two ends of the motor electrode is discharged.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a motor protection circuit using a motor driving chip according to the present invention;
fig. 2 is a schematic structural diagram of a motor M + end circuit of a motor protection circuit using a motor driving chip according to the present invention;
fig. 3 is a schematic diagram of a structure of an M-end circuit of a motor using a motor protection circuit of a motor driver chip according to the present invention;
fig. 4 is a schematic diagram of a driving chip connection circuit of a motor protection circuit using a motor driving chip according to the present invention;
fig. 5 is a schematic diagram of an external power supply circuit of the motor protection circuit using the motor driver chip according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1 to 5, a motor protection circuit using a motor driving chip includes: the motor M + end circuit is electrically connected with the driving chip connecting circuit, the motor M-end circuit is electrically connected with the driving chip connecting circuit, and the driving chip connecting circuit is electrically connected with the motor M + end circuit and the motor M-end circuit respectively.
The motor M + end circuit comprises a motor M + end, a diode D1, a diode D2, a resistor R1, a resistor R3, a resistor R6, a resistor R9 and a driving chip power supply end, the motor M + end is connected with the anode of the diode D1 and the cathode of the diode D2, the cathode of the diode D1 is connected with one end of the resistor R1, one end of the resistor R3 and the driving chip power supply end, the other end of the resistor R3 is connected with one end of the resistor R9 and one end of the resistor R6, and the other end of the resistor R9 is grounded.
The motor M-end circuit comprises a motor M-end, a diode D3 and a diode D4; the motor M-is connected with the anode of the diode D4 and the cathode of the diode D3, the anode of the diode D2 is connected with the anode of the diode D3, the anode of the diode D2 is grounded, the cathode of the diode D1 is connected with the cathode of the diode D4, one end of the resistor R1 and one end of the resistor R3, and the cathode of the diode D1 is connected with the power supply end of the driving chip.
The driving chip connecting circuit comprises a resistor R2, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a capacitor C1; the other end of the resistor R5 is connected with the base electrode of the triode Q4, the collector electrode of the triode D4 is grounded, the emitting electrode of the triode Q4 is connected with one end of the resistor R2 and one end of the resistor R8, the other end of the eighth resistor R8 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is grounded, the emitting electrode of the triode Q3 is connected with one end of the resistor R4, one end of the resistor R7 and one end of the capacitor C1, the other ends of the resistor R2 and the resistor R4 are connected with the power supply end of the driving chip, the other end of the capacitor C1 is grounded, the other end of the resistor R7 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is grounded, the emitting electrode of the triode Q2 is connected with the other end of the resistor R1, the other end of the resistor R6 is connected with the base electrode of the triode Q1, and the collector electrode of the triode Q1 is grounded.
The external power supply circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a diode D5, a triode Q5, a field effect transistor Q6 and an external power supply end; the emitter of the triode Q1 is connected with one end of the resistor R10 and one end of the resistor R14, the other end of the resistor R14 is connected with the base of the triode Q5, the collector of the triode Q5 is grounded, the emitter of the triode Q5 is connected with one end of the resistor R11 and one end of the resistor R13, the other end of the resistor R13 and one end of the resistor R12 are connected with the grid of the field-effect tube Q6, the drain of the field-effect tube Q6 is connected with the anode of the diode D5, the other end of the resistor R10 and the other end of the resistor R11 are connected with the source of the resistor R12 and the source of the field-effect tube Q6 and an external power supply end, and the cathode of the diode D5 is connected with the power supply end of the driving chip.
The type of the field effect transistor is SI2319, the type of the capacitor is 0.1uF capacitor, and the type of the diode is SS310.
In the utility model, the electromotive force generated at the two ends of the electrode of the motor by the mechanical transmission structure is pushed by the diode rectifying circuit, the electromotive force is output to the power end of the motor driving chip to provide voltage, so that the motor driving chip can not damage the motor driving chip because the power end of the chip is non-electric and the motor control end of the chip is electrified, when the electromotive force is lower than the preset protection voltage, the triodes Q1 and Q4 are conducted, the triodes Q5 and Q3 are conducted, the field effect tube Q6 is conducted, the triode Q2 is turned off, and the external power end supplies power to the power end of the motor driving chip through the field effect tube Q6 and the diode D5; when the electromotive force exceeds the preset protection voltage, the triodes Q1 and Q4 are conducted, the triodes Q5 and Q3 are opened, the field effect tube Q6 is turned off, the discharge loop formed by the resistor R1 and the triode Q2 is conducted, the motor is pushed by the mechanical transmission structure, and the electromotive force output from the two ends of the motor electrode is discharged.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A motor protection circuit using a motor driving chip, comprising: the motor M + end circuit is electrically connected with the driving chip connecting circuit, the motor M-end circuit is electrically connected with the driving chip connecting circuit, and the driving chip connecting circuit is electrically connected with the motor M + end circuit and the motor M-end circuit respectively.
2. The motor protection circuit using motor driver chip as claimed in claim 1, wherein said motor M + side circuit includes a motor M + side, a diode D1, a diode D2, a resistor R1, a resistor R3, a resistor R6, a resistor R9 and a driver chip power supply terminal, said motor M + side is connected to the anode of said diode D1 and the cathode of said diode D2, the cathode of said diode D1 is connected to one end of said resistor R1 and one end of said resistor R3 and said driver chip power supply terminal, the other end of said resistor R3 is connected to one end of said resistor R9 and one end of said resistor R6, and the other end of said resistor R9 is grounded.
3. The motor protection circuit using the motor driving chip as claimed in claim 2, wherein the motor M-side circuit comprises a motor M-side, a diode D3, a diode D4; the motor M-is connected with the anode of the diode D4 and the cathode of the diode D3, the anode of the diode D2 is connected with the anode of the diode D3, the anode of the diode D2 is grounded, the cathode of the diode D1 is connected with the cathode of the diode D4, one end of the resistor R1 and one end of the resistor R3, and the cathode of the diode D1 is connected with the power supply end of the driving chip.
4. The motor protection circuit using the motor driving chip as claimed in claim 3, wherein the driving chip connection circuit comprises a resistor R2, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q4, and a capacitor C1; the other end of the resistor R5 is connected with the base electrode of the triode Q4, the collector electrode of the triode D4 is grounded, the emitter electrode of the triode Q4 is connected with one end of the resistor R2 and one end of the resistor R8, the other end of the resistor R8 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is grounded, the emitter electrode of the triode Q3 is connected with one end of the resistor R4, one end of the resistor R7 and one end of the capacitor C1, the other ends of the resistor R2 and the resistor R4 are connected with the power supply end of the driving chip, the other end of the capacitor C1 is grounded, the other end of the resistor R7 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is grounded, the emitter electrode of the triode Q2 is connected with the other end of the resistor R1, the other end of the resistor R6 is connected with the base electrode of the triode Q1, and the collector electrode of the triode Q1 is grounded.
5. The motor protection circuit using a motor driver chip according to claim 4, wherein said external power supply circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a diode D5, a transistor Q5, a field effect transistor Q6, and an external power supply terminal; an emitting electrode of the triode Q1 is connected with one end of the resistor R10 and one end of the resistor R14, the other end of the resistor R14 is connected with a base electrode of the triode Q5, a collecting electrode of the triode Q5 is grounded, an emitting electrode of the triode Q5 is connected with one end of the resistor R11 and one end of the resistor R13, the other end of the resistor R13 and one end of the resistor R12 are connected with a grid electrode of the field-effect tube Q6, a drain electrode of the field-effect tube Q6 is connected with an anode of the diode D5, the other end of the resistor R10 and the other end of the resistor R11 are connected with the other end of the resistor R12, a source electrode of the field-effect tube Q6 and the external power supply end, and a cathode of the diode D5 is connected with a power supply end of a driving chip.
6. The motor protection circuit using the motor driver chip as claimed in claim 5, wherein the type of said fet is SI2319, the type of said capacitor is 0.1uF capacitor, and the type of said diode is SS310.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221279151.1U CN218771840U (en) | 2022-05-25 | 2022-05-25 | Motor protection circuit using motor driving chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221279151.1U CN218771840U (en) | 2022-05-25 | 2022-05-25 | Motor protection circuit using motor driving chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218771840U true CN218771840U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221279151.1U Active CN218771840U (en) | 2022-05-25 | 2022-05-25 | Motor protection circuit using motor driving chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218771840U (en) |
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2022
- 2022-05-25 CN CN202221279151.1U patent/CN218771840U/en active Active
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