Can cutting machine motor drive control circuit and can cutting machine
Patent Information
- Application Number
- CN202611146712.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-30
- Publication Date
- 2026-09-25
AI Technical Summary
但是，现有的切罐机容易出现切割的刀片卡在罐头上，进而导致切罐机中的电机出现堵转损坏的问题
[0014]本发明技术方案通过采用一种切罐机电机驱动控制电路，可以有效的提高切罐机工作的稳定性。切罐机电机驱动控制电路包括主控电路、电机驱动电路和电流检测电路。其中，电机驱动电路可以在主控电路的控制下驱动电机正转或者反转，从而使得切罐机在出现切割的刀片卡在罐头上时，可以通过电机反转，进而带动切割的刀片进行反转退刀，以将刀片退出卡刀的区域。主控电路通过电流检测电路实现对电机的工作电流的检测，从而通过电流检测信号对应的电流值确定电机是否处于工作异常状态，进而确定切割的刀片是否出现卡刀的问题，以控制电机的工作状态，避免电机工作异常。
Smart Images
Figure CN122823338A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of can cutting machine technology, and in particular to a motor drive control circuit for a can cutting machine and a can cutting machine. Background Technology
[0002] Cans with missing or damaged pull tabs are often difficult to open. Therefore, existing products include can-cutting machines for automatic can cutting. However, these machines are prone to blade jamming on the can, leading to motor stalling and damage. Summary of the Invention
[0003] The main objective of this invention is to provide a motor drive control circuit for a can cutter, which aims to improve the stability of the can cutter's operation.
[0004] To achieve the above objectives, this invention proposes a motor drive control circuit for a can cutting machine, applied to a can cutting machine, the can cutting machine including a motor and a battery, the motor drive control circuit for the can cutting machine including: The main control circuit is used to output the motor forward rotation control signal and the motor reverse rotation control signal; The motor drive circuit has its output terminal electrically connected to the power supply terminal of the motor, its controlled terminal electrically connected to the main control circuit, and its input terminal electrically connected to the battery. The motor drive circuit is used to drive the motor to rotate forward when it receives a forward rotation control signal, and to drive the motor to rotate in reverse when it receives a reverse rotation control signal. A current detection circuit is included, wherein its input terminal is electrically connected to the motor drive circuit and the main control circuit; the current detection circuit is used to detect the operating current of the motor and output a corresponding current detection signal. The main control circuit is used to output a motor reversal control signal for a first preset duration when the current value corresponding to the current detection signal is in an abnormal state.
[0005] In one embodiment, the motor drive circuit is an H-bridge motor drive circuit. The input terminal of the H-bridge motor drive circuit is electrically connected to the battery, the controlled terminal of the H-bridge motor drive circuit is electrically connected to the main control circuit, and the output terminal of the H-bridge motor drive circuit is electrically connected to the power supply terminal of the motor. The H-bridge motor drive circuit is used to drive the motor to rotate forward when it receives the motor forward rotation control signal, and to drive the motor to rotate in reverse when it receives the motor reverse rotation control signal.
[0006] In one embodiment, the H-bridge motor drive circuit includes: The first bridge arm circuit has a first end electrically connected to the battery, a controlled end electrically connected to the main control circuit, and a second end electrically connected to one end of the power supply of the motor. The second bridge arm circuit has a first end electrically connected to the battery, a controlled end of the first bridge arm circuit electrically connected to the main control circuit, and a second end electrically connected to the other end of the power supply terminal of the motor.
[0007] In one embodiment, the first bridge arm circuit includes a first PMOS transistor, a first NMOS transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor; the second bridge arm circuit includes a second PMOS transistor, a second NMOS transistor, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. In this configuration, the source of the first PMOS transistor is electrically connected to the battery, the source of the second PMOS transistor, the first terminal of the second resistor, and the first terminal of the sixth resistor; the gate of the first PMOS transistor is electrically connected to the second terminal of the first resistor and the second terminal of the second resistor; and the drain of the first PMOS transistor is electrically connected to the drain of the first NMOS transistor and one end of the power supply terminal of the motor. The gate of the first NMOS transistor is electrically connected to the second terminal of the third resistor and the first terminal of the fourth resistor; the source of the first NMOS transistor is connected to the ground terminal and the source of the second NMOS transistor. The first terminal of the first resistor is connected to the main... The control circuit is electrically connected as follows: the first end of the third resistor is electrically connected to the main control circuit; the second end of the fourth resistor is electrically connected to the ground terminal; the gate of the second PMOS transistor is electrically connected to the second end of the fifth resistor and the second end of the sixth resistor; the drain of the second PMOS transistor is electrically connected to the drain of the second NMOS transistor and one end of the power supply terminal of the motor; the gate of the second NMOS transistor is electrically connected to the second end of the seventh resistor and the first end of the eighth resistor; the first end of the fifth resistor is electrically connected to the main control circuit; the first end of the seventh resistor is electrically connected to the main control circuit; and the second end of the eighth resistor is electrically connected to the ground terminal.
[0008] In one embodiment, the motor drive circuit further includes: The first NMOS switching circuit has its drain electrically connected to the first end of the first resistor, its gate electrically connected to the main control circuit, and its source electrically connected to the ground terminal. The second NMOS switching circuit has its drain electrically connected to the first end of the fifth resistor, its gate electrically connected to the main control circuit, and its source electrically connected to the ground terminal. Specifically, when the first NMOS switch circuit is in the off state, the first PMOS transistor is in the off state; when the first NMOS switch circuit is in the on state, the first PMOS transistor is in the on state; when the second NMOS switch circuit is in the off state, the second PMOS transistor is in the off state; and when the second NMOS switch circuit is in the on state, the second PMOS transistor is in the on state.
[0009] In one embodiment, the first NMOS switching circuit includes a third NMOS transistor, a ninth resistor, and a tenth resistor; the second NMOS switching circuit includes a fourth NMOS transistor, an eleventh resistor, and a twelfth resistor. In this configuration, the drain of the third NMOS transistor is electrically connected to the first terminal of the first resistor, the gate of the third NMOS transistor is electrically connected to the second terminal of the ninth resistor and the first terminal of the tenth resistor, and the source of the third NMOS transistor is electrically connected to ground; the first terminal of the ninth resistor is electrically connected to the main control circuit, and the second terminal of the tenth resistor is electrically connected to ground; the drain of the fourth NMOS transistor is electrically connected to the first terminal of the fifth resistor, the gate of the fourth NMOS transistor is electrically connected to the second terminal of the eleventh resistor and the first terminal of the twelfth resistor, and the source of the fourth NMOS transistor is electrically connected to ground; the first terminal of the eleventh resistor is electrically connected to the main control circuit, and the second terminal of the twelfth resistor is electrically connected to ground.
[0010] In one embodiment, the motor drive control circuit of the can cutting machine further includes a signal amplification circuit. The input terminal of the signal amplification circuit is electrically connected to the output terminal of the current detection circuit, and the output terminal of the signal amplification circuit is electrically connected to the main control circuit. The signal amplification circuit is used to receive the current detection signal, amplify it, and then output it to the main control circuit.
[0011] In one embodiment, the main control circuit is specifically used to output a motor reversal control signal for a first preset duration when the current value corresponding to the current detection signal is not in a preset current range; The main control circuit is further configured to output a motor reverse control signal for a first preset duration when the motor forward rotation control signal is output for a second preset duration.
[0012] The present invention also proposes a can cutting machine, the can cutting machine comprising a motor, a battery and a can cutting machine motor drive control circuit as described in any of the above claims.
[0013] In one embodiment, the can cutting machine further includes: Charging port for connecting to an external power source; A charging management circuit is provided, wherein the input terminal of the charging management circuit is electrically connected to the charging interface, and the output terminal of the charging management circuit is electrically connected to the battery and the main control circuit; the charging management circuit is used for charging management of the battery and outputting charging status signals.
[0014] This invention employs a motor drive control circuit for a can cutter, which effectively improves the stability of the can cutter's operation. The motor drive control circuit includes a main control circuit, a motor drive circuit, and a current detection circuit. The motor drive circuit, under the control of the main control circuit, drives the motor to rotate forward or reverse. This allows the can cutter to reverse the motor and retract the blade when it gets stuck on the can, thus removing the blade from the jammed area. The main control circuit uses the current detection circuit to detect the motor's operating current. By analyzing the current value corresponding to the current detection signal, it determines whether the motor is in an abnormal operating state, and thus whether the cutting blade is jammed, thereby controlling the motor's operating state and preventing abnormal motor operation. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the motor drive control circuit of the can cutting machine of the present invention; Figure 2 This is a schematic diagram of a module of an embodiment of the motor drive control circuit for a can cutter according to the present invention; Figure 3 This is a circuit diagram of an embodiment of the motor drive control circuit for a can cutter according to the present invention; Figure 4 This is a circuit diagram of another embodiment of the motor drive control circuit for the can cutting machine of the present invention.
[0017] Explanation of icon numbers: 10. Main control circuit; 20. Motor drive circuit; 21. First bridge arm circuit; 22. Second bridge arm circuit; 23. First NMOS transistor switching circuit; 24. Second NMOS transistor switching circuit; 30. Current detection circuit; 40. Signal amplification circuit; Q1. First PMOS transistor; Q2. First NMOS transistor; Q3. Second PMOS transistor; Q4. Second NMOS transistor; Q5. Third PMOS transistor; Q6. Fourth PMOS transistor; R1-R12. First resistor-twelfth resistor.
[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0021] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.
[0022] Cans with missing or damaged pull tabs are often difficult to open. Therefore, existing products include can-cutting machines for automatic can cutting. However, these machines are prone to blade jamming on the can, leading to motor stalling and damage.
[0023] To solve the above problems, refer to Figures 1 to 4 This invention proposes a motor drive control circuit for a can cutting machine, applied to a can cutting machine, the can cutting machine including a motor and a battery, the motor drive control circuit for the can cutting machine including: The main control circuit 10 is used to output the motor forward rotation control signal and the motor reverse rotation control signal; The motor drive circuit 20 has its output terminal electrically connected to the power supply terminal of the motor, its controlled terminal electrically connected to the main control circuit 10, and its input terminal electrically connected to the battery. The motor drive circuit 20 is used to drive the motor to rotate forward when it receives a forward rotation control signal, and to drive the motor to rotate in reverse when it receives a reverse rotation control signal. The current detection circuit 30 is electrically connected to the motor drive circuit 20 and the main control circuit 10. The current detection circuit 30 is used to detect the operating current of the motor and output a corresponding current detection signal. The main control circuit 10 is used to output a motor reversal control signal for a first preset duration when the current value corresponding to the current detection signal is in an abnormal state.
[0024] In this embodiment, the main control circuit 10 can be implemented using a main controller, such as a DSP (Digital Signal Processor), MCU (Microcontroller Unit), FPGA (Field Programmable Gate Array), or SOC (System On Chip).
[0025] In this embodiment, the motor drive circuit 20 can be a drive circuit capable of driving the motor to rotate forward and reverse, such as an H-bridge motor drive circuit 20 or a discrete transistor symmetrical control circuit. Specifically, by electrically connecting the output terminal of the motor drive circuit 20 to the power supply terminal of the motor, the controlled terminal to the main control circuit 10, and the input terminal to the battery, the motor is driven to rotate forward when a forward control signal is received from the main control circuit 10, and driven to rotate in reverse when a reverse control signal is received from the main control circuit 10.
[0026] Optionally, the motor drive circuit 20 is an H-bridge motor drive circuit 20. The input terminal of the H-bridge motor drive circuit 20 is electrically connected to the battery, the controlled terminal of the H-bridge motor drive circuit 20 is electrically connected to the main control circuit 10, and the output terminal of the H-bridge motor drive circuit 20 is electrically connected to the power supply terminal of the motor. The H-bridge motor drive circuit 20 is used to drive the motor to rotate forward when it receives the motor forward rotation control signal, and to drive the motor to rotate in reverse when it receives the motor reverse rotation control signal.
[0027] In this embodiment, the motor drive circuit 20 is an H-bridge motor drive circuit 20. The H-bridge motor drive circuit 20 can be composed of four power switching transistors forming an H-type topology. The main control circuit 10 controls the switching transistors on the diagonal to alternately conduct, thereby changing the current flow from the first terminal of the motor's power supply to the second terminal, or from the second terminal of the motor's power supply to the first terminal, thus easily achieving forward and reverse rotation control of the motor.
[0028] Optionally, the H-bridge motor drive circuit 20 includes: First bridge arm circuit 21, the first end of the first bridge arm circuit 21 is electrically connected to the battery, the controlled end of the first bridge arm circuit 21 is electrically connected to the main control circuit 10, and the second end of the first bridge arm circuit 21 is electrically connected to one end of the power supply of the motor. The second bridge arm circuit 22 has a first end electrically connected to the battery, a controlled end of the first bridge arm circuit 21 electrically connected to the main control circuit 10, and a second end of the second bridge arm circuit 22 electrically connected to the other end of the power supply terminal of the motor.
[0029] The first bridge arm circuit 21 includes a first PMOS transistor Q1, a first NMOS transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; the second bridge arm circuit 22 includes a second PMOS transistor Q3, a second NMOS transistor Q4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. In this configuration, the source of the first PMOS transistor Q1 is electrically connected to the battery, the source of the second PMOS transistor Q3, the first terminal of the second resistor R2, and the first terminal of the sixth resistor R6; the gate of the first PMOS transistor Q1 is electrically connected to the second terminals of the first resistor R1 and the second resistor R2; and the drain of the first PMOS transistor Q1 is electrically connected to the drain of the first NMOS transistor Q2 and one end of the power supply terminal of the motor. The gate of the first NMOS transistor Q2 is electrically connected to the second terminal of the third resistor R3 and the first terminal of the fourth resistor R4; and the source of the first NMOS transistor Q2 is connected to the ground terminal and the source of the second NMOS transistor Q4. The first terminal of the first resistor R1 is connected to the main control circuit. Circuit 10 is electrically connected. The first end of the third resistor R3 is electrically connected to the main control circuit 10, and the second end of the fourth resistor R4 is electrically connected to the ground terminal. The gate of the second PMOS transistor Q3 is electrically connected to the second end of the fifth resistor R5 and the second end of the sixth resistor R6. The drain of the second PMOS transistor Q3 is electrically connected to the drain of the second NMOS transistor Q4 and one end of the power supply terminal of the motor. The gate of the second NMOS transistor Q4 is electrically connected to the second end of the seventh resistor R7 and the first end of the eighth resistor R8. The first end of the fifth resistor R5 is electrically connected to the main control circuit 10, the first end of the seventh resistor R7 is electrically connected to the main control circuit 10, and the second end of the eighth resistor R8 is electrically connected to the ground terminal.
[0030] In this embodiment, the main control circuit 10 controls the first PMOS transistor Q1, the first NMOS transistor Q2, the second PMOS transistor Q3, and the second NMOS transistor Q4 to control the direction of the motor operating current. To ensure stable driving of the first PMOS transistor Q1 and the second PMOS transistor Q3, corresponding NMOS transistors are provided at the gates of the first PMOS transistor Q1 and the second PMOS transistor Q3 to achieve reliable turn-off and rapid turn-on of the PMOS transistors.
[0031] Optionally, the motor drive circuit 20 further includes: The first NMOS switching circuit has its drain electrically connected to the first end of the first resistor R1, its gate electrically connected to the main control circuit 10, and its source electrically connected to the ground terminal. The second NMOS switching circuit has its drain electrically connected to the first end of the fifth resistor R5, its gate electrically connected to the main control circuit 10, and its source electrically connected to the ground terminal. Specifically, when the first NMOS switch circuit is in the off state, the first PMOS transistor Q1 is in the off state; when the first NMOS switch circuit is in the on state, the first PMOS transistor Q1 is in the on state; when the second NMOS switch circuit is in the off state, the second PMOS transistor Q3 is in the off state; and when the second NMOS switch circuit is in the on state, the second PMOS transistor Q3 is in the on state.
[0032] Optionally, the first NMOS switching circuit includes a third NMOS transistor, a ninth resistor R9, and a tenth resistor R10; the second NMOS switching circuit includes a fourth NMOS transistor, an eleventh resistor R11, and a twelfth resistor R12. In this configuration, the drain of the third NMOS transistor is electrically connected to the first terminal of the first resistor R1, the gate of the third NMOS transistor is electrically connected to the second terminal of the ninth resistor R9 and the first terminal of the tenth resistor R10, and the source of the third NMOS transistor is electrically connected to ground. The first terminal of the ninth resistor R9 is electrically connected to the main control circuit 10, and the second terminal of the tenth resistor R10 is electrically connected to ground. The drain of the fourth NMOS transistor is electrically connected to the first terminal of the fifth resistor R5, the gate of the fourth NMOS transistor is electrically connected to the second terminal of the eleventh resistor R11 and the first terminal of the twelfth resistor R12, and the source of the fourth NMOS transistor is electrically connected to ground. The first terminal of the eleventh resistor R11 is electrically connected to the main control circuit 10, and the second terminal of the twelfth resistor R12 is electrically connected to ground.
[0033] In this embodiment, the main control circuit 10 controls the motor to rotate forward by outputting a high level to the first NMOS transistor Q2 and the fourth NMOS transistor, and a low level to the second NMOS transistor Q4 and the third NMOS transistor; the main control circuit 10 controls the motor to rotate in reverse by outputting a low level to the first NMOS transistor Q2 and the fourth NMOS transistor, and a high level to the second NMOS transistor Q4 and the third NMOS transistor. The first resistor R1, the fourth resistor R4, the sixth resistor R6, the eighth resistor R8, the tenth resistor R10, and the twelfth resistor R12 form a pull-down circuit, and the second resistor R2, the third resistor R3, the fifth resistor R5, the seventh resistor R7, the ninth resistor R9, and the eleventh resistor R11 are gate current-limiting resistors.
[0034] In addition, in this embodiment, the H-bridge motor drive circuit 20 is also provided with protection circuits, filtering circuits, etc., to ensure the safety and stability of the operation of the H-bridge motor drive circuit 20.
[0035] In this embodiment, the current detection circuit 30 can be implemented using a shunt resistor circuit, a Hall current sensor, etc. By electrically connecting the input terminal of the current detection circuit 30 to the motor drive circuit 20 and the output terminal of the current detection circuit 30 to the main control circuit 10, the operating current of the motor is detected, and a current detection signal is output to the main control circuit 10. The main control circuit 10 receives the current detection signal output by the current detection circuit 30, determines the operating current of the motor, and compares the motor's operating current with a preset current range to determine whether the current value corresponding to the current detection signal is in an abnormal state. If the main control circuit 10 determines that the current value corresponding to the current detection signal is in an abnormal state, it outputs a motor reversal control signal for a first preset duration. The first preset current range can be set according to the current value of the motor in an abnormal state; the first preset duration can be set according to the distance the motor reverses and moves the blades, for example, 2 seconds.
[0036] By employing a motor drive control circuit for a can cutter, the stability of the can cutter's operation can be effectively improved. The motor drive control circuit includes a main control circuit 10, a motor drive circuit 20, and a current detection circuit 30. The motor drive circuit 20, under the control of the main control circuit 10, drives the motor to rotate forward or reverse. This allows the can cutter to reverse the motor and retract the blade when it gets stuck on the can, thus removing the blade from the jammed area. The main control circuit 10 detects the motor's operating current through the current detection circuit 30. The current value corresponding to the current detection signal determines whether the motor is in an abnormal operating state, and thus whether the cutting blade is jammed, thereby controlling the motor's operating state and preventing abnormal motor operation.
[0037] refer to Figures 2 to 4 In one embodiment of the present invention, the motor drive control circuit of the can cutting machine further includes a signal amplification circuit 40. The input terminal of the signal amplification circuit 40 is electrically connected to the output terminal of the current detection circuit 30, and the output terminal of the signal amplification circuit 40 is electrically connected to the main control circuit 10. The signal amplification circuit 40 is used to receive the current detection signal, amplify it, and then output it to the main control circuit 10.
[0038] In this embodiment, the signal amplification circuit 40 can be implemented using a corresponding signal amplification chip or operational amplifier. It is understood that the current detection signal output by the current detection circuit 30 may not be effectively recognized by the main control circuit 10. Therefore, to ensure that the current detection signal output by the current detection circuit 30 can be effectively recognized by the main control circuit 10, and thus stably output the corresponding control signal, the signal amplification circuit 40 can be configured to achieve stable control of the motor drive circuit 20.
[0039] In addition, the motor drive control circuit of the can cutting machine may also include a temperature detection circuit, with the detection terminal of the temperature detection circuit set at the motor to detect the operating temperature of the motor. When the main control circuit 10 determines that the temperature value corresponding to the temperature detection signal is greater than the preset temperature value, it controls the motor drive circuit 20 to stop driving the motor.
[0040] In one embodiment of the present invention, the main control circuit 10 is specifically used to output a motor reversal control signal for a first preset duration when the current value corresponding to the current detection signal is not in a preset current range. The main control circuit 10 is further configured to output a motor reverse control signal for a first preset duration when the motor forward rotation control signal is output for a second preset duration.
[0041] In this embodiment, the preset current range can be set according to the current value of the motor under abnormal conditions. For example, when the current value corresponding to the current detection signal is greater than 6A, the main control circuit 10 will output a motor reversal control signal to the motor drive circuit 20 for 2 seconds and then stop the motor drive circuit 20 from driving the motor. As another example, after the motor has been operating normally for 1.5 seconds, the main control circuit 10 will use the ten data points collected by the current detection circuit 30 within one second as a reference value, and then judge once every second. When the current value corresponding to the current detection signal is less than 4 / 5 of the reference value, the main control circuit 10 will output a motor reversal control signal to the motor drive circuit 20 for 2 seconds and then stop the motor drive circuit 20 from driving the motor. As yet another example, after the motor has been operating normally for 1.5 seconds, when the current value corresponding to the current detection signal is less than 1A, the main control circuit 10 will output a motor reversal control signal to the motor drive circuit 20 for 2 seconds and then stop the motor drive circuit 20 from driving the motor. The second preset duration can be set according to the cutting speed of the can cutter. For example, if the can cutter is set to cut all known cans within 50 seconds, the second preset duration can be set to 60 seconds. After the motor has been running for 60 seconds, the main control circuit 10 will output a motor reverse control signal to the motor drive circuit 20 for 2 seconds and then stop the motor drive circuit 20 from driving the motor.
[0042] The present invention also proposes a can-cutting machine, which includes a motor, a battery, and a can-cutting machine motor drive control circuit as described in any of the above claims. It is worth noting that since the can-cutting machine of the present invention is based on the aforementioned can-cutting machine motor drive control circuit, the embodiments of the can-cutting machine of the present invention include all the technical solutions of all embodiments of the aforementioned can-cutting machine motor drive control circuit, and the achieved technical effects are exactly the same, and will not be repeated here.
[0043] In one embodiment of the present invention, the can cutting machine further includes: Charging port for connecting to an external power source; A charging management circuit is provided, wherein the input terminal of the charging management circuit is electrically connected to the charging interface, and the output terminal of the charging management circuit is electrically connected to the battery and the main control circuit 10; the charging management circuit is used for charging management of the battery and outputting charging status signals.
[0044] In this embodiment, the can cutter is equipped with a charging interface and a charging management circuit to charge the battery in the can cutter. The output of the charging management circuit is electrically connected to the battery and the main control circuit 10, thereby outputting a charging status signal to the main control circuit 10 while charging the battery. This allows the main control circuit 10 to stop the motor drive circuit 20 from driving the motor when it determines that the battery is charging. This effectively prevents the can cutter from starting the motor while charging, thus preventing the battery from being used while charging, which could lead to a dangerous situation.
[0045] In addition, the can cutting machine is also equipped with buttons, digital tube display components, etc.
[0046] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A motor drive control circuit for a can cutting machine, applied to a can cutting machine, characterized in that, The can cutter includes a motor and a battery, and the motor drive control circuit of the can cutter includes: The main control circuit is used to output the motor forward rotation control signal and the motor reverse rotation control signal; The motor drive circuit has its output terminal electrically connected to the power supply terminal of the motor, its controlled terminal electrically connected to the main control circuit, and its input terminal electrically connected to the battery. The motor drive circuit is used to drive the motor to rotate forward when it receives a forward rotation control signal, and to drive the motor to rotate in reverse when it receives a reverse rotation control signal. A current detection circuit is included, wherein its input terminal is electrically connected to the motor drive circuit and the main control circuit; the current detection circuit is used to detect the operating current of the motor and output a corresponding current detection signal. The main control circuit is used to output a motor reversal control signal for a first preset duration when the current value corresponding to the current detection signal is in an abnormal state.
2. The can-cutting machine motor drive control circuit as described in claim 1, characterized in that, The motor drive circuit is an H-bridge motor drive circuit. The input terminal of the H-bridge motor drive circuit is electrically connected to the battery, the controlled terminal of the H-bridge motor drive circuit is electrically connected to the main control circuit, and the output terminal of the H-bridge motor drive circuit is electrically connected to the power supply terminal of the motor. The H-bridge motor drive circuit is used to drive the motor to rotate forward when it receives the forward rotation control signal of the motor. Used to drive the motor to reverse when the motor reverse control signal is received.
3. The can-cutting machine motor drive control circuit as described in claim 2, characterized in that, The H-bridge motor drive circuit includes: The first bridge arm circuit has a first end electrically connected to the battery, a controlled end electrically connected to the main control circuit, and a second end electrically connected to one end of the power supply of the motor. The second bridge arm circuit has a first end electrically connected to the battery, a controlled end of the first bridge arm circuit electrically connected to the main control circuit, and a second end electrically connected to the other end of the power supply terminal of the motor.
4. The can-cutting machine motor drive control circuit as described in claim 3, characterized in that, The first bridge arm circuit includes a first PMOS transistor, a first NMOS transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor; the second bridge arm circuit includes a second PMOS transistor, a second NMOS transistor, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. In this configuration, the source of the first PMOS transistor is electrically connected to the battery, the source of the second PMOS transistor, the first terminal of the second resistor, and the first terminal of the sixth resistor; the gate of the first PMOS transistor is electrically connected to the second terminal of the first resistor and the second terminal of the second resistor; and the drain of the first PMOS transistor is electrically connected to the drain of the first NMOS transistor and one end of the power supply terminal of the motor. The gate of the first NMOS transistor is electrically connected to the second terminal of the third resistor and the first terminal of the fourth resistor; the source of the first NMOS transistor is connected to the ground terminal and the source of the second NMOS transistor. The first terminal of the first resistor is connected to the main... The control circuit is electrically connected as follows: the first end of the third resistor is electrically connected to the main control circuit; the second end of the fourth resistor is electrically connected to the ground terminal; the gate of the second PMOS transistor is electrically connected to the second end of the fifth resistor and the second end of the sixth resistor; the drain of the second PMOS transistor is electrically connected to the drain of the second NMOS transistor and one end of the power supply terminal of the motor; the gate of the second NMOS transistor is electrically connected to the second end of the seventh resistor and the first end of the eighth resistor; the first end of the fifth resistor is electrically connected to the main control circuit; the first end of the seventh resistor is electrically connected to the main control circuit; and the second end of the eighth resistor is electrically connected to the ground terminal.
5. The can-cutting machine motor drive control circuit as described in claim 4, characterized in that, The motor drive circuit also includes: The first NMOS switching circuit has its drain electrically connected to the first end of the first resistor, its gate electrically connected to the main control circuit, and its source electrically connected to the ground terminal. The second NMOS switching circuit has its drain electrically connected to the first end of the fifth resistor, its gate electrically connected to the main control circuit, and its source electrically connected to the ground terminal. Specifically, when the first NMOS switch circuit is in the off state, the first PMOS transistor is in the off state; when the first NMOS switch circuit is in the on state, the first PMOS transistor is in the on state; when the second NMOS switch circuit is in the off state, the second PMOS transistor is in the off state; and when the second NMOS switch circuit is in the on state, the second PMOS transistor is in the on state.
6. The can-cutting machine motor drive control circuit as described in claim 5, characterized in that, The first NMOS switching circuit includes a third NMOS transistor, a ninth resistor, and a tenth resistor; the second NMOS switching circuit includes a fourth NMOS transistor, an eleventh resistor, and a twelfth resistor. In this configuration, the drain of the third NMOS transistor is electrically connected to the first terminal of the first resistor, the gate of the third NMOS transistor is electrically connected to the second terminal of the ninth resistor and the first terminal of the tenth resistor, and the source of the third NMOS transistor is electrically connected to ground; the first terminal of the ninth resistor is electrically connected to the main control circuit, and the second terminal of the tenth resistor is electrically connected to ground; the drain of the fourth NMOS transistor is electrically connected to the first terminal of the fifth resistor, the gate of the fourth NMOS transistor is electrically connected to the second terminal of the eleventh resistor and the first terminal of the twelfth resistor, and the source of the fourth NMOS transistor is electrically connected to ground; the first terminal of the eleventh resistor is electrically connected to the main control circuit, and the second terminal of the twelfth resistor is electrically connected to ground.
7. The motor drive control circuit for the can cutting machine as described in claim 1, characterized in that, The motor drive control circuit of the can cutting machine also includes a signal amplification circuit. The input terminal of the signal amplification circuit is electrically connected to the output terminal of the current detection circuit, and the output terminal of the signal amplification circuit is electrically connected to the main control circuit. The signal amplification circuit is used to receive the current detection signal, amplify it, and then output it to the main control circuit.
8. The can-cutting machine motor drive control circuit as described in claim 1, characterized in that, The main control circuit is specifically used to output a motor reversal control signal for a first preset duration when the current value corresponding to the current detection signal is not in the preset current range. The main control circuit is further configured to output a motor reverse control signal for a first preset duration when the motor forward rotation control signal is output for a second preset duration.
9. A can cutting machine, characterized in that, The can cutter includes a motor, a battery, and a can cutter motor drive control circuit as described in any one of claims 1 to 8.
10. The can cutting machine as described in claim 9, characterized in that, The can cutting machine also includes: Charging port for connecting to an external power source; A charging management circuit is provided, wherein the input terminal of the charging management circuit is electrically connected to the charging interface, and the output terminal of the charging management circuit is electrically connected to the battery and the main control circuit; the charging management circuit is used for charging management of the battery and outputting charging status signals.