CN116599391B - Electric grinder, speed regulating circuit of electric grinder and control method of speed regulating circuit - Google Patents
Electric grinder, speed regulating circuit of electric grinder and control method of speed regulating circuit Download PDFInfo
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- CN116599391B CN116599391B CN202310869263.5A CN202310869263A CN116599391B CN 116599391 B CN116599391 B CN 116599391B CN 202310869263 A CN202310869263 A CN 202310869263A CN 116599391 B CN116599391 B CN 116599391B
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 70
- 230000001276 controlling effect Effects 0.000 claims description 32
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- 230000001939 inductive effect Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 15
- 230000001052 transient effect Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 3
- 235000002566 Capsicum Nutrition 0.000 description 2
- 239000004278 EU approved seasoning Substances 0.000 description 2
- 102000005591 NIMA-Interacting Peptidylprolyl Isomerase Human genes 0.000 description 2
- 108010059419 NIMA-Interacting Peptidylprolyl Isomerase Proteins 0.000 description 2
- 101150087393 PIN3 gene Proteins 0.000 description 2
- 239000006002 Pepper Substances 0.000 description 2
- 241000722363 Piper Species 0.000 description 2
- 235000016761 Piper aduncum Nutrition 0.000 description 2
- 235000017804 Piper guineense Nutrition 0.000 description 2
- 235000008184 Piper nigrum Nutrition 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 235000011194 food seasoning agent Nutrition 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/063—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current using centrifugal devices, e.g. switch, resistor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J42/00—Coffee mills; Spice mills
- A47J42/38—Parts or details
- A47J42/46—Driving mechanisms; Coupling to drives
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses an electric grinder, a speed regulating circuit of the electric grinder and a control method thereof, wherein the speed regulating circuit of the electric grinder comprises a power supply circuit, a driving circuit and a control circuit, the control circuit comprises a main control chip U4, a gear change-over switch S1, a sense switch S2 and a third diode D3, the main control chip U4 is connected between the power supply circuit and the driving circuit and grounded, the gear change-over switch S1 comprises a public end, a first speed gear end, a stop gear end and a second speed gear end, the first speed gear end and the second speed gear end are respectively connected with the main control chip U4, the third diode D3 is connected between the first speed gear end and the second speed gear end, the sense switch S2 is connected with the public end and grounded, and the sense switch S2 triggers the conduction when sensing the electric grinder to stand upside down. The electric grinder has different grinding speeds and can meet different grinding requirements.
Description
Technical Field
The invention relates to the field of electric grinders, in particular to an electric grinder, a speed regulating circuit of the electric grinder and a control method of the speed regulating circuit.
Background
Most of electric grinders in the market at present grind at a single speed of high speed or low speed, and have no corresponding speed regulation function. Because the grinder is mainly used for grinding some seasonings such as salt, pepper and the like. The thickness of a finished product is determined by the grinding head and the grinding speed, the actual use requirement of a customer cannot be obviously met only by a single speed, and the product is not intelligent and humanized.
Disclosure of Invention
The invention provides an electric grinder with different grinding speeds and meeting different grinding requirements, a speed regulating circuit of the electric grinder and a control method thereof, which are realized by the following technical scheme:
The utility model provides a speed governing circuit of electric grinder, includes power supply circuit and drive circuit, still includes control circuit, control circuit includes main control chip U4, gear change over switch S1, inductive switch S2, third diode D3, main control chip U4 connect in power supply circuit with between the drive circuit and ground connection, main control chip U4 has first gear control end, second gear control end, gear change over switch S1 includes the first speed grade end, the second speed grade end of common end and switchable gear, stops the gear end, first speed grade end with first gear control end is connected, the second speed grade end with second gear control end is connected, third diode D3 connect in first speed grade end with between the second speed grade end, inductive switch S2 with common end is connected and ground connection, inductive switch S2 switches on when sensing the electric grinder and triggers the upside down.
Further, the power supply circuit comprises a battery and a battery protection circuit, the battery protection circuit comprises a battery protection chip U3, a sixth resistor R6 and a fifth capacitor C5, one end of the fifth capacitor C5 is connected with one end of the battery protection chip U3 and one end of the sixth resistor R6, and the other end of the fifth capacitor C5 is connected with the battery protection chip U3 and grounded; the positive electrode of the battery is connected with the other end of the sixth resistor R6, and the negative electrode of the battery is connected with the other end of the fifth capacitor C5.
Further, the power supply circuit further comprises a voltage stabilizing circuit, the voltage stabilizing circuit comprises a voltage stabilizing chip U2, a third capacitor C3 and a fourth capacitor C4, one end of the third capacitor C3 is connected with one end of the fourth capacitor C4 and the voltage stabilizing chip U2, the other end of the third capacitor C3 is connected with the other end of the fourth capacitor C4 and the voltage stabilizing chip U2 and grounded, the other end of the sixth resistor R6 is connected with the voltage stabilizing chip U2, and one end of the fourth capacitor C4 is connected with the main control chip U4.
Further, the power supply circuit further includes a battery voltage detection circuit, the battery voltage detection circuit includes a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 is connected to the other end of the sixth resistor R6, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the main control chip U4, and the other end of the fifth resistor R5 is grounded.
Further, the power supply circuit further comprises a charging circuit, the charging circuit comprises a charging chip U1, a first diode D1, a first capacitor C1, a second capacitor C2, a transient diode TVS and a charging interface, the anode of the first diode D1 is connected with the charging interface, the cathode of the first diode D1 is connected with one end of the first capacitor C1 and the charging chip U1, and the other ends of the charging chip U1 and the first capacitor C1 are grounded; one pole of the transient diode TVS is connected to one end of the second capacitor C2, the other end of the sixth resistor R6, and the charging chip U1, and the other pole of the transient diode TVS and the other end of the second capacitor C2 are grounded.
Further, the power supply circuit further comprises a charging detection circuit, the charging detection circuit comprises a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected with the cathode of the first diode D1, the other end of the first resistor R1 is connected with one end of the second resistor R2 and the main control chip U4, and the other end of the second resistor R2 is grounded.
Further, the power supply circuit further includes a charge indication circuit, the charge indication circuit includes a first triode Q1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first light emitting diode, and a second light emitting diode, a base electrode of the first triode Q1 is connected with the charging chip U1 through the ninth resistor R9, an emitter electrode of the first triode Q1 is connected with a cathode electrode of the first diode D1, a collector electrode of the first triode Q1 is connected with an anode electrode of the first light emitting diode through the tenth resistor R10, an anode electrode of the second light emitting diode is connected with the main control chip U4 through the eleventh resistor R11, and a cathode electrode of the first light emitting diode is connected with a cathode electrode of the second light emitting diode and grounded.
Further, the driving circuit includes a motor, a seventh resistor R7, an eighth resistor R8, a second diode D2, a sixth capacitor C6, and a MOS tube, where a gate of the MOS tube is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, the other end of the seventh resistor R7 is connected to the main control chip U4, both the other end of the eighth resistor R8 and a source of the MOS tube are grounded, a drain of the MOS tube is connected to an anode of the second diode D2, one end of the sixth capacitor C6, and a cathode of the motor, an anode of the motor is connected to a cathode of the second diode D2 and the other end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is connected to one end of the fourth capacitor C4.
The control method of the speed regulating circuit of the electric grinder is applied to the speed regulating circuit of the electric grinder, and comprises the following steps:
Acquiring a state signal of the induction switch S2, wherein the state signal comprises an off signal and an on signal, and the on signal is triggered when the electric grinder is inverted by the induction switch S2;
when the state signal is the conduction signal, acquiring a gear signal of the gear change-over switch S1, wherein the gear signal comprises a first speed signal, a second speed signal and a stop signal;
And controlling the motor to rotate according to the corresponding speed according to the gear signal.
Further, the step of controlling the motor to rotate according to the corresponding speed according to the gear signal includes:
when the gear signal is the first speed signal, controlling the motor to rotate at a high speed, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
When the gear signal is the second speed signal, controlling the motor to rotate at a low speed, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
When the gear signal is the stop signal, the motor is controlled to stop rotating, and the first light emitting diode is controlled to be turned off and the second light emitting diode is controlled to be turned off.
Further, before the step of obtaining the gear signal of the gear change switch S1, the method further includes:
Detecting a current battery voltage value;
Executing the step of acquiring the gear signal of the gear change switch S1 when the battery voltage value is greater than or equal to the preset voltage lower limit value;
And when the battery voltage value is smaller than the preset threshold value, controlling the motor to stop rotating, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned off.
Further, before the step of obtaining the status signal of the inductive switch S2, the method further includes:
identifying whether a charging power supply is connected;
if yes, comparing the current battery voltage value with a preset voltage upper limit value;
When the battery voltage value is greater than or equal to the preset voltage upper limit value, controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
When the battery voltage value is smaller than the preset voltage upper limit value, the first light-emitting diode is controlled to be turned on, and the second light-emitting diode is controlled to be turned off;
returning to execute the step of identifying whether the charging power supply is connected;
If not, executing the step of acquiring the state signal of the inductive switch S2.
An electric grinder comprising a speed regulating circuit as claimed in any one of the preceding claims.
The design has the following advantages: according to the invention, the inductive switch S2 is arranged in the control circuit, so that the electric grinder can be used only when the machine body is turned upside down, the operation of a user is convenient, and meanwhile, the gear change-over switch S1 is arranged in the control circuit, so that the electric grinder has the working rotation speed selection of two gears of high speed/low speed, the thickness suitable for the actual needs of a customer can be ground, the actual grinding needs of the customer in different occasions are met, and the use is more flexible.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a speed regulation circuit of an electric grinder according to the present invention;
Fig. 2 is a flow chart of an embodiment of a control method of a speed regulating circuit of the electric grinder of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and detailed description.
As shown in fig. 1, the embodiment provides a speed regulating circuit of an electric grinder, which comprises a power supply circuit and a driving circuit, and further comprises a control circuit, wherein the control circuit comprises a main control chip U4, a gear change-over switch S1, a sensing switch S2 and a third diode D3, the main control chip U4 is connected between the power supply circuit and the driving circuit, the 8 th pin of the main control chip U4 is grounded, the gear change-over switch S1 comprises a common end, a first speed gear end capable of changing gears, a second speed gear end and a stop gear end, anodes of the first speed gear end and the third diode D3 are connected with the 7 th pin of the main control chip U4, cathodes of the second speed gear end and the third diode D3 are connected with the 2 nd pin of the main control chip U4, the sensing switch S2 is connected with the common end and connected with the sensing switch S2 triggers conduction when the electric grinder is inverted.
Further, referring to fig. 2, the driving circuit includes a motor, a seventh resistor R7, an eighth resistor R8, a second diode D2, a sixth capacitor C6, and a MOS transistor, wherein a gate of the MOS transistor is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, the other end of the seventh resistor R7 is connected to the 5 th pin of the main control chip U4, the other end of the eighth resistor R8 and a source of the MOS transistor are grounded, a drain of the MOS transistor is connected to an anode of the second diode D2, one end of the sixth capacitor C6, and a cathode of the motor, an anode of the motor is connected to a cathode of the second diode D2 and the other end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is connected to one end of the fourth capacitor C4.
Specifically, the structure of the electric grinder comprises a shell, a power mechanism (motor) arranged in the shell and a grinding mechanism (grinding head) arranged at the output end of the power mechanism. The shell is also internally provided with a switch circuit board, and the shell is provided with a key for controlling the rotation of the motor.
In this embodiment, the third diode D3, the gear change-over switch S1 and the inductive switch S2 form a working gear input line. The inductive switch S2 is connected to the common terminal of the gear change-over switch S1 and is connected to GND, and the high-speed and low-speed selection pins are respectively connected to the MCU (main control chip U4).
The sensing switch S2 may be an angle switch, a tilt switch, a gravity switch or other switches that can sense the status of the electric grinder body. When the electric grinder body is in an inverted state, the inductive switch S2 is turned on, and when the electric grinder body is in a non-inverted state (such as an upright state and an inclined state), the inductive switch S2 is turned off. One end of an adjusting handle of the gear change-over switch S1 is a public end, and the other end of the adjusting handle can be connected with a first speed gear end, a second speed gear end or a stop gear end through swinging, so that gear change is realized. The first speed is greater than the second speed, namely the first speed gear end is a high speed gear end, and the second speed gear end is a low speed gear end.
The specific use modes of the electric grinder comprise the following three conditions.
When the gear change-over switch S1 is shifted to a 'high-speed' gear, the inductive switch S2 is conducted when the machine body is turned upside down, and the high-speed selection pin is conducted with GND. The MCU wakes up from dormancy, when detecting that the high-speed gear access GND is effective, outputs high level to push the N-MOSFET field effect transistor to drive a MOTOR (MOTOR) to perform grinding work at full speed. Stopping grinding when the machine body is erected or a stop gear is set, and enabling the whole machine to enter a dormant state again;
When the gear change-over switch S1 is shifted to a stop gear, the inductive switch S2 cannot be communicated with GND when the machine body is upright, inclined or reversed, the MCU (main control chip U4) stops all output when detecting that the high speed and the low speed are invalid, the MOTOR cannot be operated, and the whole machine enters a sleep mode;
When the gear change-over switch S1 is shifted to a 'low-speed' gear, the inductive switch S2 is conducted when the machine body is turned upside down, and the low-speed selection pin is conducted with GND. The MCU (main control chip U4) wakes up from dormancy, and when detecting that the low-speed gear access GND is effective, the MCU outputs PWM level to drive the N-MOSFET field effect transistor to drive the MOTOR (MOTOR) to perform grinding work at a low speed; when the machine body is erected or is shifted to a stop gear, the electric grinder stops grinding, and the whole machine enters a dormant state again.
In this embodiment, through setting up inductive switch S2 in control circuit for electric grinder just can use when the fuselage is stood, makes things convenient for user 'S operation, simultaneously, be provided with gear change over switch S1 in the control circuit, make electric grinder have the selection of the operating rotation speed of two gears of high-speed/low-speed, can grind out the thickness that is fit for customer' S actual need, satisfy the actual grinding demand of customer in different occasions, use more nimble.
On the driving circuit, the second diode D2 plays a role of freewheeling, and the sixth capacitor C6 plays a role of suppressing high-frequency harmonics. Through using the MOTOR drive circuit of 1N-MOSFET, dispose freewheeling diode D2 and high frequency capacitor C6 and protect, the circuit is safe and reliable, easy and practical to handle.
Further, referring to fig. 2, the power supply circuit includes a battery and a battery protection circuit, the battery protection circuit includes a battery protection chip U3, a sixth resistor R6, and a fifth capacitor C5, one end of the fifth capacitor C5 is connected to a1 st pin of the battery protection chip U3 and one end of the sixth resistor R6, the other end of the fifth capacitor C5 is connected to a2 nd pin and a3 rd pin of the battery protection chip U3, the 2 nd pin and the 3 rd pin of the battery protection chip U3 are simultaneously grounded, and the 4 th pin and the 5 th pin of the battery protection chip U3 are simultaneously grounded; the positive electrode of the battery is connected with the other end of the sixth resistor R6, and the negative electrode of the battery is connected with the other end of the fifth capacitor C5.
In the embodiment, the battery protection circuit has the functions of over-charge and over-current protection and output short-circuit protection of the lithium battery, and ensures the use safety of users.
Further, referring to fig. 2, the power supply circuit further includes a voltage stabilizing circuit, where the voltage stabilizing circuit includes a voltage stabilizing chip U2, a third capacitor C3, and a fourth capacitor C4, one end of the third capacitor C3 is connected to one end of the fourth capacitor C4 and a 2 nd pin of the voltage stabilizing chip U2, the other end of the third capacitor C3 is connected to the other end of the fourth capacitor C4 and a 1 st pin of the voltage stabilizing chip U2 and grounded, the other end of the sixth resistor R6 is connected to a 3 rd pin of the voltage stabilizing chip U2, and one end of the fourth capacitor C4 is connected to the 1 st pin of the main control chip U4.
In this embodiment, the voltage stabilizing circuit is used for supplying power to the main control chip U4 stably, and the whole circuit operates stably and reliably.
Further, referring to fig. 2, the power supply circuit further includes a charging circuit, where the charging circuit includes a charging chip U1, a first diode D1, a first capacitor C1, a second capacitor C2, a third resistor R3, a transient diode TVS, and a charging interface USB, where an anode of the first diode D1 is connected to the charging interface, a cathode of the first diode D1 is connected to one end of the first capacitor C1 and a4 th pin of the charging chip U1, a2 nd pin of the charging chip U1 and another end of the first capacitor C1 are grounded, and a 6 th pin of the charging chip U1 is grounded through the third resistor R3; one pole of the transient diode TVS is connected to one end of the second capacitor C2, the other end of the sixth resistor R6, and the 3 rd pin of the charging chip U1, and the other pole of the transient diode TVS and the other end of the second capacitor C2 are grounded.
Further, referring to fig. 2, the power supply circuit further includes a charge indication circuit, where the charge indication circuit includes a first triode Q1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first light emitting diode, and a second light emitting diode, a base of the first triode Q1 is connected to a1 st pin of the charging chip U1 through the ninth resistor R9, an emitter of the first triode Q1 is connected to a cathode of the first diode D1, a collector of the first triode Q1 is connected to an anode of the first light emitting diode through the tenth resistor R10, an anode of the second light emitting diode is connected to a 3 rd pin of the main control chip U4 through the eleventh resistor R11, and a cathode of the first light emitting diode is connected to a cathode of the second light emitting diode and grounded.
In the embodiment, the charging chip U1, the first diode D1, the first capacitor C1, the second capacitor C2, the third resistor R3, and the transient diode TVS form a charging circuit, and the first triode Q1, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11 and the red-white LEDs (first light emitting diode, second light emitting diode) form a charging indication circuit. When the charging power supply 5VDC is sent into the charging chip U1 through the first diode D1, the charging chip U1 charges the lithium battery, meanwhile, the PIN1 of the charging chip U1 is set to be low level, and the red part (first light emitting diode) of the LED is lightened under the action of the first triode Q1 to indicate that the whole machine is in charging; when the charging chip U1 detects that the lithium battery is full, the charging chip U1 stops charging, the PIN1 is reset to be at a high level, the red part (the first light-emitting diode) of the LED is extinguished, and the charging is ended.
Further, referring to fig. 2, the power supply circuit further includes a charge detection circuit, where the charge detection circuit includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to the cathode of the first diode D1, the other end of the first resistor R1 is connected to one end of the second resistor R2 and the 6 th pin of the main control chip U4, and the other end of the second resistor R2 is grounded.
In this embodiment, by the charge detection circuit, whether a charging power source is connected or not can be identified. When the charging power supply is identified to be connected, namely the electric grinder is charged, the whole machine cannot work; when no charging power is identified to be connected, the whole machine can work normally. The charging is quick and safe, the whole machine line is stable and reliable to run, and the operation of a user is convenient.
Further, referring to fig. 2, the power supply circuit further includes a battery voltage detection circuit, where the battery voltage detection circuit includes a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 is connected to the other end of the sixth resistor R6, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the 4 th pin of the main control chip U4, and the other end of the fifth resistor R5 is grounded.
In this embodiment, when the MCU (the main control chip U4) detects that the voltage of the lithium battery is too low, the response operation is stopped, and the MOTOR is stopped, so as to achieve the purpose of protecting the lithium battery. The whole machine circuit is simple and practical, safe and reliable.
As shown in fig. 2, the present embodiment provides a control method of a speed regulating circuit of an electric grinder, which is applied to the speed regulating circuit of the electric grinder as described above, and includes the following steps:
S100, acquiring a state signal of the inductive switch S2, wherein the state signal comprises an off signal and an on signal, and the on signal is triggered when the inductive switch S2 is inverted by the electric grinder;
s200, acquiring a gear signal of the gear change-over switch S1 when the state signal is the conduction signal, wherein the gear signal comprises a first speed signal, a second speed signal and a stop signal;
and S300, controlling the motor to rotate according to the corresponding speed according to the gear signal.
The first speed is greater than the second speed, i.e. the first speed signal is a high speed signal and the second speed signal is a low speed signal.
In this embodiment, the operation flow of the electric grinder is as follows.
Grinding: adding salt, pepper or other seasonings into the cavity, covering the cavity with a cover, selecting a high-speed or low-speed gear, and standing the cavity upside down for grinding;
Stopping grinding: after finishing grinding, the machine body is erected or the machine body is shifted to a stop gear, so that the MOTOR operation can be stopped, and the whole machine enters a dormant standby state again.
Further, the step S300 includes:
S310, when the gear signal is the first speed signal, controlling the motor to rotate at a high speed, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
S320, when the gear signal is the second speed signal, controlling the motor to rotate at a low speed, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
S330, when the gear signal is the stop signal, controlling the motor to stop rotating, and controlling the first light emitting diode to be turned off and the second light emitting diode to be turned off.
In this embodiment, when the MOTOR is running at high speed and low speed, the white LED (second light emitting diode) of the operation indicator light is turned on, and stops to be turned off.
Further, before the step S200, the method further includes:
S410, detecting the current battery voltage value;
S420, executing the step S200 when the battery voltage value is greater than or equal to the preset voltage lower limit value;
And S430, when the battery voltage value is smaller than the preset threshold value, controlling the motor to stop rotating, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned off.
In this embodiment, when the MCU (the main control chip U4) detects that the voltage of the lithium battery is too low, the response operation is stopped, and the MOTOR is stopped, so as to achieve the purpose of protecting the lithium battery. The whole machine circuit is simple and practical, safe and reliable.
Further, before the step S100, the method further includes:
S500, identifying whether a charging power supply is connected;
If yes, S510, comparing the current battery voltage value with the preset upper voltage limit value;
S511, when the battery voltage value is greater than or equal to the preset voltage upper limit value, controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
S512, when the battery voltage value is smaller than the preset voltage upper limit value, the first light-emitting diode is controlled to be lightened, and the second light-emitting diode is controlled to be extinguished;
S513, returning to execute the step S500;
If not, the step S100 is executed.
In this embodiment, the lithium battery voltage is continuously detected when the main control chip U4 detects 5VDC input. When the completion of the charging of the lithium battery is detected, PIN3 outputs a high level to drive the white part (second light emitting diode) of the LED, and the red part (first light emitting diode) of the LED is turned off to indicate that the current charging is completed; while PIN3 continues to output high when the MOTOR is driven, causing the LED to display white indicating that the MOTOR is in operation.
The foregoing detailed description is directed to embodiments of the invention, and is not intended to limit the scope of the invention, but rather to cover all modifications and variations within the scope of the invention.
Claims (8)
1. The utility model provides a speed governing circuit of electric grinder, includes power supply circuit and drive circuit, its characterized in that: the electric grinder comprises a power supply circuit, a driving circuit, a control circuit, a main control chip U4, a gear change-over switch S1, an induction switch S2 and a third diode D3, wherein the main control chip U4 is connected between the power supply circuit and the driving circuit and is grounded, the main control chip U4 is provided with a first gear control end and a second gear control end, the gear change-over switch S1 comprises a public end, a first speed gear end capable of changing gears, a second speed gear end and a stop gear end, the first speed is higher than the second speed, the first speed gear end is connected with the first gear control end, the second speed gear end is connected with the second gear control end, the third diode D3 is connected between the first speed gear end and the second speed gear end, the induction switch S2 is connected with the public end and is grounded, the induction switch S2 triggers an electric grinder to be turned on when the electric grinder is sensed, and the electric grinder is turned off when the electric grinder is turned on and is inclined;
The power supply circuit comprises a battery and a battery protection circuit, the battery protection circuit comprises a battery protection chip U3, a sixth resistor R6 and a fifth capacitor C5, one end of the fifth capacitor C5 is connected with the VDD end of the battery protection chip U3 and one end of the sixth resistor R6, and the other end of the fifth capacitor C5 is connected with the GDN end of the battery protection chip U3 and grounded; the positive electrode of the battery is connected with the other end of the sixth resistor R6, and the negative electrode of the battery is connected with the other end of the fifth capacitor C5;
The power supply circuit further comprises a voltage stabilizing circuit, the voltage stabilizing circuit comprises a voltage stabilizing chip U2, a third capacitor C3 and a fourth capacitor C4, one end of the third capacitor C3 is connected with one end of the fourth capacitor C4 and the voltage output end of the voltage stabilizing chip U2, the other end of the third capacitor C3 is connected with the other end of the fourth capacitor C4 and the GDN end of the voltage stabilizing chip U2 and grounded, the other end of the sixth resistor R6 is connected with the voltage input end of the voltage stabilizing chip U2, and one end of the fourth capacitor C4 is connected with the VDD end of the main control chip U4;
the power supply circuit further comprises a battery voltage detection circuit, the battery voltage detection circuit comprises a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 is connected with the other end of the sixth resistor R6, the other end of the fourth resistor R4 is connected with one end of the fifth resistor R5 and a battery voltage detection end of the main control chip U4, and the other end of the fifth resistor R5 is grounded;
The power supply circuit further comprises a charging circuit, the charging circuit comprises a charging chip U1, a first diode D1, a first capacitor C1, a second capacitor C2, a transient diode TVS and a charging interface, the anode of the first diode D1 is connected with the charging interface and grounded, the cathode of the first diode D1 is connected with one end of the first capacitor C1 and the VCC end of the charging chip U1, and the GDN end of the charging chip U1 and the other end of the first capacitor C1 are grounded; one pole of the transient diode TVS is connected to one end of the second capacitor C2, the other end of the sixth resistor R6, and the BAT end of the charging chip U1, and the other pole of the transient diode TVS and the other end of the second capacitor C2 are grounded;
The power supply circuit further comprises a charging indication circuit, the charging indication circuit comprises a first triode Q1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first light emitting diode and a second light emitting diode, a base electrode of the first triode Q1 is connected with the CHGR end of the charging chip U1 through the ninth resistor R9, an emitting electrode of the first triode Q1 is connected with a cathode of the first diode D1, a collecting electrode of the first triode Q1 is connected with an anode of the first light emitting diode through the tenth resistor R10, an anode of the second light emitting diode is connected with an LED control end of the main control chip U4 through the eleventh resistor R11, and a cathode of the first light emitting diode is connected with a cathode of the second light emitting diode and grounded.
2. The electric grinder speed regulation circuit according to claim 1, wherein: the power supply circuit further comprises a charging detection circuit, the charging detection circuit comprises a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected with the cathode of the first diode D1, the other end of the first resistor R1 is connected with one end of the second resistor R2 and the charging voltage detection end of the main control chip U4, and the other end of the second resistor R2 is grounded.
3. The electric grinder speed regulation circuit according to claim 1, wherein: the driving circuit comprises a motor, a seventh resistor R7, an eighth resistor R8, a second diode D2, a sixth capacitor C6 and a MOS tube, wherein the grid electrode of the MOS tube is connected with one end of the seventh resistor R7 and one end of the eighth resistor R8, the other end of the seventh resistor R7 is connected with the motor control end of the main control chip U4, the other end of the eighth resistor R8 and the source electrode of the MOS tube are grounded, the drain electrode of the MOS tube is connected with the anode of the second diode D2, one end of the sixth capacitor C6 and the cathode of the motor, the anode of the motor is connected with the cathode of the second diode D2 and the other end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is connected with one end of the fourth capacitor C4.
4. A control method of a speed regulating circuit of an electric grinder, applied to the speed regulating circuit of the electric grinder as set forth in any one of claims 1 to 3, characterized in that: the method comprises the following steps:
Acquiring a state signal of the induction switch S2, wherein the state signal comprises an off signal and an on signal, and the on signal is triggered when the electric grinder is inverted by the induction switch S2;
when the state signal is the conduction signal, acquiring a gear signal of the gear change-over switch S1, wherein the gear signal comprises a first speed signal, a second speed signal and a stop signal;
And controlling the motor to rotate according to the corresponding speed according to the gear signal.
5. The method of controlling the speed regulating circuit of the electric grinder according to claim 4, wherein: the step of controlling the motor to rotate according to the corresponding speed according to the gear signal comprises the following steps:
when the gear signal is the first speed signal, controlling the motor to rotate at a high speed, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
When the gear signal is the second speed signal, controlling the motor to rotate at a low speed, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
When the gear signal is the stop signal, the motor is controlled to stop rotating, and the first light emitting diode is controlled to be turned off and the second light emitting diode is controlled to be turned off.
6. The method of controlling the speed regulating circuit of the electric grinder according to claim 4, wherein: before the step of obtaining the gear signal of the gear change switch S1, the method further includes:
Detecting a current battery voltage value;
Executing the step of acquiring the gear signal of the gear change-over switch S1 when the battery voltage value is greater than or equal to a preset voltage lower limit value;
and when the voltage value of the battery is smaller than a preset threshold value, controlling the motor to stop rotating, and controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned off.
7. The method of controlling the speed regulating circuit of the electric grinder according to claim 4, wherein: before the step of obtaining the status signal of the inductive switch S2, the method further includes:
identifying whether a charging power supply is connected;
if yes, comparing the current battery voltage value with a preset voltage upper limit value;
When the battery voltage value is greater than or equal to the preset voltage upper limit value, controlling the first light-emitting diode to be turned off and the second light-emitting diode to be turned on;
When the battery voltage value is smaller than the preset voltage upper limit value, the first light-emitting diode is controlled to be turned on, and the second light-emitting diode is controlled to be turned off;
returning to execute the step of identifying whether the charging power supply is connected;
If not, executing the step of acquiring the state signal of the inductive switch S2.
8. An electric grinder, comprising a speed regulating circuit according to any one of claims 1 to 3.
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| CN202310869263.5A CN116599391B (en) | 2023-07-17 | 2023-07-17 | Electric grinder, speed regulating circuit of electric grinder and control method of speed regulating circuit |
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| CN202310869263.5A CN116599391B (en) | 2023-07-17 | 2023-07-17 | Electric grinder, speed regulating circuit of electric grinder and control method of speed regulating circuit |
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| CN116599391B true CN116599391B (en) | 2024-05-28 |
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| CN217039812U (en) * | 2021-08-31 | 2022-07-26 | 珠海市科力通电器有限公司 | Electric pepper grinder |
| CN219048156U (en) * | 2023-01-10 | 2023-05-23 | 广州思创家居用品有限公司 | Gravity-sensing switch grinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206211596U (en) * | 2016-11-11 | 2017-05-31 | 常州市武进大成工贸有限公司 | Mini electric mill lithium battery alignment circuit |
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| CN116599391A (en) | 2023-08-15 |
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