Control circuit and control method for realizing motor braking through two-wire lap joint
Through the two-wire overlapping control circuit design, combined with the combination of diode, capacitor and transistor, the problem of the inability to stop uniformly and high-cost wiring of the food cargo lane motor is solved, the motor is smoothly braked and circuit stability is achieved, and the wiring cost is reduced and the control program is simplified.
Patent Information
- Application Number
- CN202510469724.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-07-04
AI Technical Summary
The control circuit of the existing food cargo motor cannot ensure that the stop position is consistent every time and no manual reset is required. The four-wire overlapping results in high wiring costs and complex control procedures, so the hardware cannot replace the control part of the MCU substrate motor.
The control circuit design with two-wire overlap is adopted, including the MCU control units P1, P2, motor M01 and SW-SPDT switches. Through the combination of diodes, capacitors, resistors and transistors, the transistor is used to conduct and consume excess current when the reverse current is turned on, and the voltage is stabilized by the diodes and capacitors, the motor is achieved smooth braking and circuit stability.
It realizes that the motor stops without delay after power is cut off, extends the motor service life, reduces wiring costs and simplifies control procedures.
Smart Images
Figure CN120262964A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of the control circuit of the food machine's goods channel motor, and specifically relates to a control circuit and a control method for realizing motor braking by two-wire connection. Background Art
[0002] For the food machine's goods channel motor, customers extremely hope that the motor stop position is always the same each time and there is no need to manually reset the motor stop position, but the existing equipment control circuit cannot meet the customers' needs.
[0003] Moreover, the existing food machine with a motor is connected by four wires, as Figure 2 shown, resulting in the problem of high wiring cost related to the goods channel motor.
[0004] In addition, for the food machine, the circuit of the goods channel motor brake is not integrated into the goods channel motor, resulting in a complex control program algorithm and there is no circuit that can replace the motor control part of the MCU board through hardware. Summary of the Invention
[0005] To solve the defects existing in the prior art, a control circuit for realizing motor braking by two-wire connection is provided, including an MCU control unit P1, an MCU control unit P2, a motor M01, and an SW-SPDT switch. One path of the MCU control unit P2 is connected to the MCU control unit P1, and the other path of the MCU control unit P2 is connected to the MCU control unit P1 through the SW-SPDT switch. One output path of the MCU control unit P1 is connected to the positive pole of the motor M01, and the other two output paths of the MCU control unit P1 are connected in parallel and then connected to the negative pole of the motor M01.
[0006] Further, it further includes a diode D1, a diode D2, and a capacitor C1. The diode D1 is connected in series on the output path of the MCU control unit P1 connected to the positive pole of the motor M01, and the diode D2 and the capacitor C1 are respectively connected in parallel between the negative pole of the diode D1 and the negative pole of the motor M01.
[0007] Further, it further includes a resistor R1, and the resistor R1 is connected in parallel between the positive pole of the diode D1 and the negative pole of the motor M01.
[0008] Further, it further includes a triode Q1. The emitter of the triode Q1 is connected to the negative pole of the diode D1, the base of the triode Q1 is connected to the positive pole of the diode D1, and the collector of the triode Q1 is connected to the negative pole of the motor M01.
[0009] Further, the model of the triode Q1 is 2SD772PU.
[0010] Further, the triode Q1 is in a cut-off state under forward current. Only when a reverse current appears in the circuit will the triode Q1 become conductive, and the conduction of the triode Q1 consumes the excess reverse current in the circuit.
[0011] Further, a diode D3 is provided on the branch where the base of the triode Q1 is connected to the positive pole of the diode D1.
[0012] A control method for realizing a motor braking circuit by two-wire connection includes the following steps:
[0013] S1. The MCU control unit P2 inputs a 24V voltage to rotate the M01 motor. After rotating one week, when it presses the SW-SPDT switch S1, the MCU control unit P2 cuts off the 24V power supply, and the motor stops rotating.
[0014] S2. When the shipping operation of the motor M01 is completed, the state of the SW-SPDT switch S1 changes and the power supply is cut off. At this time, the kinetic energy of the motor does not disappear, and the kinetic energy of the motor is converted into heat energy, thereby realizing the braking of the motor.
[0015] S3. The excess reverse current in the circuit is consumed by the conduction of the triode Q1.
[0016] Further, in the step S3, the motor generates an induced electromotive force and charges the circuit reversely. Through the emitter and base of the PNP triode Q1, the resistor R1 is made conductive. After the resistor R1 is conductive, the collector of the triode Q1 is also conductive. The triode Q1 consumes the electrical energy in the circuit and converts it into heat energy, and the induced electromotive force generated by the motor kinetic energy is reasonably offset by the heat energy.
[0017] Further, it also includes S4. Diodes D2, D1 and a capacitor C1 are added to prevent the generation of a sudden change voltage when the current suddenly changes or decreases, which may damage other components, so that the current can change more smoothly.
[0018] S5. A diode D3 is added to make the triode conduct smoothly, ensuring that the voltage at the base terminal of the triode is greater than the voltage at the emitter terminal under normal conditions.
[0019] The beneficial effects of the present invention are as follows:
[0020] 1. The motor of the present invention generates an induced electromotive force and charges the circuit reversely. Through the emitter and base of the PNP triode Q1, the resistor R1 is made conductive. After the resistor R1 is conductive, the collector of the triode Q1 is also conductive. The triode Q1 consumes the electrical energy in the circuit and converts it into heat energy, and the induced electromotive force generated by the motor kinetic energy is reasonably offset by the heat energy. The present invention makes the induced electromotive force generated by the motor kinetic energy disappear.
[0021] 2. Diodes D2, D1 and capacitor C1 ensure the stability of the circuit voltage, protect the stable operation of motor M01, improve the circuit stability and extend the service life of the motor.
[0022] 3. The present invention ensures that the motor stops operating without delay after the power supply is cut off. Description of the Drawings
[0023] Figure 1 is the schematic diagram of the control circuit for realizing motor braking by two-wire connection of the present invention;
[0024] Figure 2 is the schematic diagram of the four-wire motor circuit of the prior art. Detailed Embodiments
[0025] A control circuit for realizing motor braking by two-wire connection, as Figure 1 shown, includes MCU control unit P1, MCU control unit P2, motor M01 and SW-SPDT switch. One path of MCU control unit P2 is connected to MCU control unit P1, and the other path of MCU control unit P2 is connected to MCU control unit P1 through the SW-SPDT switch. One output path of MCU control unit P1 is connected to the positive pole of motor M01, and the other two output paths of MCU control unit P1 are connected in parallel and then connected to the negative pole of motor M01.
[0026] Among them, it further includes diode D1, diode D2 and capacitor C1. Diode D1 is connected in series on the output path of MCU control unit P1 connected to the positive pole of motor M01, and diode D2 and capacitor C1 are respectively connected in parallel between the negative pole of diode D1 and the negative pole of motor M01.
[0027] Among them, it further includes resistor R1. Resistor R1 is connected in parallel between the positive pole of diode D1 and the negative pole of motor M01.
[0028] Among them, it further includes triode Q1. The emitter of triode Q1 is connected to the negative pole of diode D1, the base of triode Q1 is connected to the positive pole of diode D1, and the collector of triode Q1 is connected to the negative pole of motor M01.
[0029] Among them, the model of triode Q1 is 2SD772PU.
[0030] Among them, triode Q1 is in a cut-off state under forward current, and only when there is reverse current in the circuit will triode Q1 become conductive, and triode Q1 conducts to consume the excess reverse current in the circuit.
[0031] Among them, a diode D3 is provided on the branch where the base of triode Q1 is connected to the positive pole of diode D1.
[0032] A control method for realizing a motor braking circuit by two-wire connection includes the following steps:
[0033] S1. The MCU control unit P2 inputs 24V voltage to rotate the M01 motor. After rotating one week, it presses the SW-SPDT switch S1, and the MCU control unit P2 cuts off the 24V power supply, and the motor stops rotating.
[0034] S2. When the shipping operation of the motor M01 is completed, the state of the SW-SPDT switch S1 changes and the power supply is cut off. At this time, the kinetic energy of the motor does not disappear, and the kinetic energy of the motor is converted into heat energy, thereby realizing the braking of the motor.
[0035] S3. The excess reverse current in the circuit is consumed by turning on the triode Q1.
[0036] Among them, in the step S3, the motor generates an induced electromotive force and charges the circuit reversely. The resistor R1 is turned on through the emitter and base of the PNP triode Q1. After the resistor R1 is turned on, the collector of the triode Q1 is also turned on. The triode Q1 consumes the electric energy in the circuit and converts it into heat energy, and the induced electromotive force generated by the motor kinetic energy is reasonably offset by the heat energy.
[0037] Among them, it also includes S4. Add diodes D2, D1 and capacitor C1 to prevent the generation of mutant voltage when the current suddenly changes or decreases, which may damage other components, so that the current can change more smoothly.
[0038] S5. Add diode D3 to make the triode conduct smoothly, and ensure that the voltage at the base terminal of the triode is greater than the voltage at the emitter terminal under normal conditions.
[0039] The working principle of the control circuit for realizing motor braking by two-wire connection of the present invention is as follows:
[0040] The MCU control unit P2 inputs 24V voltage to rotate the M01 motor. After rotating one week, it presses the switch S1, and the control unit P2 cuts off the 24V power supply and the motor stops rotating.
[0041] Diodes D2, diode D1 and capacitor C1 can ensure the stability of the circuit voltage, protect the stable operation of the motor M01, and extend the service life of the motor.
[0042] When the motor stops instantaneously, there is still kinetic energy that will charge the circuit reversely. The reverse current turns on the triode Q1, and this part of the reverse current can be consumed.
[0043] The triode Q1 is in the cut-off state under the forward current, and only when there is a reverse current in the circuit will the triode Q1 become conductive.
[0044] The working process of the control circuit for realizing motor braking by two-wire connection of the present invention is as follows:
[0045] 1. When the shipping operation of the motor is completed, the state of switch S1 changes and the power supply is cut off. At this time, the kinetic energy of the motor does not disappear. It is necessary to convert the kinetic energy of the motor into heat energy to achieve the braking of the motor.
[0046] 2. The motor generates an induced electromotive force and charges the circuit reversely. Through the emitter and base of PNP transistor Q1, resistor R1 is turned on. After resistor R1 is turned on, the collector of transistor Q1 is also turned on. Transistor Q1 consumes the electrical energy in the circuit and converts it into heat energy, and the induced electromotive force generated by the kinetic energy of the motor is reasonably offset by the heat energy.
[0047] 3. Diodes D2, D1 and capacitor C1 are added to prevent the generation of mutant voltages when the current suddenly changes or decreases, which may damage other components, so that the current can change smoothly.
[0048] 4. Diode D3 is added to make the transistor conduct smoothly, ensuring that the voltage at the base terminal of the transistor is greater than the voltage at the emitter terminal under normal conditions.
[0049] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A control circuit for realizing motor braking by two-wire lapping, characterized in that, It includes MCU control unit P1, MCU control unit P2, motor M01 and SW-SPDT switch S1. One path of MCU control unit P2 is connected to MCU control unit P1, and the other path of MCU control unit P2 is connected to MCU control unit P1 through SW-SPDT switch S1. One output of MCU control unit P1 is connected to the positive pole of motor M01, and the other two outputs of MCU control unit P1 are connected in parallel and then connected to the negative pole of motor M01.
2. The control circuit for realizing motor braking by two-wire lapping according to claim 1, characterized in that, It also includes diode D1, diode D2, and capacitor C1. Diode D1 is connected in series on the output path of MCU control unit P1 connected to the positive pole of motor M01, and diode D2 and capacitor C1 are respectively connected in parallel between the negative pole of diode D1 and the negative pole of motor M01.
3. The control circuit for realizing motor braking by two-wire lapping according to claim 2, characterized in that, It also includes resistor R1. Resistor R1 is connected in parallel between the positive pole of diode D1 and the negative pole of motor M01.
4. The control circuit for realizing motor braking by two-wire lapping according to claim 2, wherein, It also includes triode Q1. The emitter of triode Q1 is connected to the negative pole of diode D1, the base of triode Q1 is connected to the positive pole of diode D1, and the collector of triode Q1 is connected to the negative pole of motor M01.
5. The control circuit for realizing motor braking by two-wire lapping according to claim 4, wherein The model of triode Q1 is 2SD772PU.
6. The control circuit for realizing motor braking by two-wire lapping according to claim 4, characterized in that, Triode Q1 is in a cut-off state under forward current. Only when there is reverse current in the circuit will triode Q1 become conductive, and triode Q1 consumes the excess reverse current in the circuit.
7. The control circuit for realizing motor braking by two-wire lapping according to claim 4, wherein Diode D3 is provided on the branch where the base of triode Q1 is connected to the positive pole of diode D1.
8. A control method for realizing a motor braking circuit by two-wire lapping, characterized in that, It includes the following steps: S1. MCU control unit P2 inputs 24V voltage and motor M01 rotates. After rotating one week, it presses to SW-SPDT switch S1, and MCU control unit P2 cuts off the 24V power supply, and the motor stops rotating. S2. When the shipping operation of motor M01 is completed, the state of SW-SPDT switch S1 changes and the power supply is cut off. At this time, the kinetic energy of the motor will not disappear, and the kinetic energy of the motor is converted into heat energy, thus realizing the braking of the motor. S3. Excess reverse current in the circuit is consumed by the conduction of triode Q1.
9. The control method for realizing the motor braking circuit by two-wire lapping according to claim 8, characterized in that, In step S3, the motor generates an induced electromotive force and charges the circuit reversely. Through the emitter and base of PNP triode Q1, resistor R1 is made conductive. After resistor R1 is conductive, the collector of triode Q1 is also conductive. Triode Q1 consumes the electrical energy in the circuit and converts it into heat energy, and the induced electromotive force generated by the kinetic energy of the motor is reasonably offset by the heat energy.
10. The control method for realizing the motor braking circuit by two-wire lapping according to claim 7, characterized in that, It also includes S4. Add diodes D2, D1 and capacitor C1 to prevent sudden changes or decreases in current from generating mutant voltages and damaging other components, so that the current can change more smoothly. S5. Add diode D3 to make the triode conduct smoothly and ensure that the voltage at the base end of the triode is greater than the voltage at the emitter end under normal conditions.