Floor brush motor steady voltage control output and protection circuit

Abstract

The application discloses a floor brush motor voltage stabilization control output and protection circuit, comprising a motor starting drive and constant voltage PWM control circuit unit, a current collection and short circuit protection control unit and a circuit working function loop unit. The floor brush motor voltage stabilization control output and protection circuit provided by the application can realize the voltage stabilization output control of the floor brush motor through the cooperation of the motor starting drive and constant voltage PWM control circuit unit, the current collection and short circuit protection control unit and the circuit working function loop unit, and simultaneously has the characteristics of low circuit design cost, small EMC radiation and safe and reliable protection function, and has very great significance worthy of adoption and promotion.

Description

Technical Field

[0001] The present invention relates to the field of electronic power technology, and in particular to a ground brush motor voltage stabilization control output and protection circuit. Background Art

[0002] In traditional cordless vacuum cleaners, the DC motor in the floor brush operates over a wide voltage range. For example, in a six-string lithium-ion battery pack, the nominal operating voltage range of the DC motor is 21.6V, but the full-scale operating voltage range supports a maximum of 30V and a minimum of 10V. The DC motor's operating power is directly proportional to the voltage and current of the battery pack. Changes in voltage directly affect the operating current, causing the floor brush motor's full-scale operating power to vary with voltage.

[0003] In addition, as the power of the vacuum cleaner's floor brush motor changes, the speed also changes accordingly. The noise of the motor changes with the change of the battery pack voltage. When the voltage is high, the power is high, the speed is fast, and the sound is strong; when the voltage is low, the power is small, the speed is relatively slow, and the sound is weak, so when using the product, it causes a bad user experience.

[0004] To address these issues, a dedicated motor driver IC is typically used, coupled with an inductor circuit, and constant voltage control is achieved using the principle of a switching power supply. While this solution can achieve high-precision constant voltage output, it suffers from high cost and complex circuit design. Furthermore, due to the switching power supply design principle, EMC safety certification requirements are stringent, and noise testing can easily exceed standards.

[0005] Therefore, there is a need to improve the existing technology.

[0006] The above information is presented as background information only to assist with an understanding of the present disclosure and is not a determination or admission that any of the above may be applicable as prior art with respect to the present disclosure. Summary of the Invention

[0007] The present invention provides a floor brush motor voltage stabilization control output and protection circuit to solve the deficiencies of the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A ground brush motor voltage stabilization control output and protection circuit, including a motor start-up drive and constant voltage PWM control circuit unit, a current acquisition and short-circuit protection control unit, and a circuit working function loop unit; wherein,

[0010] The circuit working function loop unit includes a battery pack total positive voltage terminal P+ and a battery pack total negative voltage terminal B- for connecting to a battery pack, and a floor brush motor positive access terminal M+ and a floor brush motor negative access terminal M- for connecting to a floor brush motor; the battery pack total positive voltage terminal P+ is connected to the floor brush motor positive access terminal M+, and the battery pack total negative voltage terminal B- is connected to the floor brush motor negative access terminal M-;

[0011] The motor start-up drive and constant voltage PWM control circuit unit includes a first MOS tube Q1, a second transistor Q2, a third transistor Q3, a fifth transistor Q5 and a second diode D2; the S pole of the first MOS tube Q1 is connected to the total negative voltage terminal B- of the battery pack, the D pole of the first MOS tube Q1 is connected to the negative access terminal M- of the ground brush motor, the G pole of the first MOS tube Q1 is connected to the e pole of the third transistor Q3; the anode of the second diode D2 is connected to the c pole of the second transistor Q2 The cathode of the second diode D2 is connected to the G electrode of the first MOS transistor Q1; the b electrode of the third transistor Q3 is connected between the anode of the second diode D2 and the c electrode of the second transistor Q2, and the c electrode of the third transistor Q3 is grounded; the e electrode of the second transistor Q2 is connected to the MCU, and the b electrode of the second transistor Q2 is connected to the c electrode of the fifth transistor Q5; the e electrode of the fifth transistor Q5 is grounded, and the b electrode of the fifth transistor Q5 is connected to the MCU;

[0012] The current collection and short-circuit protection control unit includes a fourth transistor Q4;

[0013] The b-pole of the fourth transistor Q4 is connected to the S-pole of the first MOS transistor Q1 , the e-pole of the fourth transistor Q4 is grounded, and the c-pole of the fourth transistor Q4 is connected to the MCU.

[0014] Furthermore, in the floor brush motor voltage stabilization control output and protection circuit, the circuit working function loop unit further includes a fuse F1 and a first resistor R1;

[0015] The fuse F1 is connected in series between the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the ground brush motor;

[0016] The first resistor R1 is connected in series between the S pole of the first MOS transistor Q1 and the total negative voltage terminal B- of the battery pack.

[0017] Furthermore, in the ground brush motor voltage stabilization control output and protection circuit, the circuit working function loop unit further includes a first diode D1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a thirteenth resistor R13 and a fourteenth resistor R14;

[0018] One end of the first diode D1 is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end of the first diode D1 is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor;

[0019] The third capacitor C3 and the fourth capacitor C4 are connected in series, one end of which is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor;

[0020] The first capacitor C1 and the second capacitor C2 are connected in series, one end of which is connected to the S electrode of the first MOS transistor Q1, and the other end of which is connected to the D electrode of the first MOS transistor Q1;

[0021] One end of the thirteenth resistor R13 and the fourteenth resistor R14 connected in series is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor.

[0022] Furthermore, in the ground brush motor voltage stabilization control output and protection circuit, the motor power-on drive and constant voltage PWM control circuit unit further includes a third resistor R3, a fifth resistor R5, a seventh resistor R7, a ninth resistor R9, a tenth resistor R10 and a twelfth resistor R12;

[0023] The third resistor R3 is connected in series between the e-pole of the second transistor Q2 and the MCU;

[0024] The fifth resistor R5 is connected in parallel between the e-pole and the b-pole of the second transistor Q2;

[0025] The seventh resistor R7 is connected in series between the b-pole of the second transistor Q2 and the c-pole of the fifth transistor Q5;

[0026] The ninth resistor R9 is connected in series between the b-pole of the fifth transistor Q5 and the MCU;

[0027] The tenth resistor R10 is connected in series between the C-pole of the third transistor Q3 and the ground;

[0028] The twelfth resistor R12 is connected in parallel between the b-pole and the e-pole of the fifth transistor Q5.

[0029] Furthermore, in the ground brush motor voltage stabilization control output and protection circuit, the motor startup drive and constant voltage PWM control circuit unit further includes a second resistor R2 and a voltage stabilizing diode Z1;

[0030] One end of the second resistor R2 is connected to the S electrode of the first MOS transistor Q1, and the other end of the second resistor R2 is connected to the G electrode of the first MOS transistor Q1;

[0031] The anode of the voltage stabilizing diode Z1 is connected to the S electrode of the first MOS transistor Q1 , and the cathode of the voltage stabilizing diode Z1 is connected to the G electrode of the first MOS transistor Q1 .

[0032] Furthermore, in the ground brush motor voltage stabilization control output and protection circuit, the current acquisition and short-circuit protection control unit further includes a fourth resistor R4 and a fifth capacitor C5;

[0033] One end of the fourth resistor R4 is connected between the first resistor R1 and the S electrode of the first MOS transistor Q1, and the other end of the fourth resistor R4 is connected to the MCU;

[0034] One end of the fifth capacitor C5 is connected between the fourth resistor R4 and the MCU, and the other end of the fifth capacitor C5 is grounded.

[0035] Furthermore, in the ground brush motor voltage stabilization control output and protection circuit, the current acquisition and short-circuit protection control unit further includes a sixth resistor R6, an eighth resistor R8, an eleventh resistor R11 and a sixth capacitor C6;

[0036] The sixth resistor R6 is connected in series between the B-pole of the fourth transistor Q4 and the S-pole of the MOS transistor Q1;

[0037] The eighth resistor R8 is connected in series between the C-pole of the fourth transistor Q4 and the MCU;

[0038] The eleventh resistor R11 is connected in parallel between the b-pole and the e-pole of the fourth transistor Q4;

[0039] The sixth capacitor C6 is connected in parallel between the b-pole and the e-pole of the fourth transistor Q4.

[0040] Furthermore, in the ground brush motor voltage stabilization control output and protection circuit, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are filter capacitors.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The present invention provides a floor brush motor voltage stabilization control output and protection circuit. By setting a motor power-on drive and constant voltage PWM control circuit unit, a current acquisition and short-circuit protection control unit, and a circuit working function loop unit, the coordinated cooperation of these three can achieve voltage stabilization output control of the floor brush motor. At the same time, it has the characteristics of low circuit design cost, low EMC radiation, and safe and reliable protection function, which is very worthy of adoption and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a circuit principle diagram of a floor brush motor voltage stabilization control output and protection circuit provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a centrally located component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be a centrally located component.

[0047] In addition, terms such as "long", "short", "inside", and "outside" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientation structure, and should not be understood as a limitation of the present invention.

[0048] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0049] Example 1

[0050] In light of the aforementioned shortcomings of existing floor brush motor voltage stabilization control technology, the applicant, drawing on years of extensive practical experience and expertise in the design and manufacture of such products, combined with applied theory, has actively engaged in research and innovation, hoping to create a technology that can address these shortcomings and make floor brush motor voltage stabilization control technology more practical. After continuous research and design, repeated prototype production, and improvements, the applicant has finally created this invention, which has proven to be of practical value.

[0051] Please refer to Figure 1 The embodiment of the present invention provides a ground brush motor voltage stabilization control output and protection circuit. The constant voltage can be customized. To maximize the utilization of the battery pack power, the voltage design standard is CV = 3V * N (number of battery strings). For example, for a 6-string battery pack, the set voltage stabilization value is 18V. The circuit specifically includes a motor start-up drive and constant voltage PWM control circuit unit, a current acquisition and short-circuit protection control unit, and a circuit working function loop unit; wherein,

[0052] The circuit working function loop unit includes a battery pack total positive voltage terminal P+ and a battery pack total negative voltage terminal B- for connecting to a battery pack, and a floor brush motor positive access terminal M+ and a floor brush motor negative access terminal M- for connecting to a floor brush motor; the battery pack total positive voltage terminal P+ is connected to the floor brush motor positive access terminal M+, and the battery pack total negative voltage terminal B- is connected to the floor brush motor negative access terminal M-;

[0053] The motor start-up drive and constant voltage PWM control circuit unit includes a first MOS tube Q1, a second transistor Q2, a third transistor Q3, a fifth transistor Q5 and a second diode D2; the S pole of the first MOS tube Q1 is connected to the total negative voltage terminal B- of the battery pack, the D pole of the first MOS tube Q1 is connected to the negative access terminal M- of the ground brush motor, the G pole of the first MOS tube Q1 is connected to the e pole of the third transistor Q3; the anode of the second diode D2 is connected to the c pole of the second transistor Q2 The cathode of the second diode D2 is connected to the G electrode of the first MOS transistor Q1; the b electrode of the third transistor Q3 is connected between the anode of the second diode D2 and the c electrode of the second transistor Q2, and the c electrode of the third transistor Q3 is grounded; the e electrode of the second transistor Q2 is connected to the MCU, and the b electrode of the second transistor Q2 is connected to the c electrode of the fifth transistor Q5; the e electrode of the fifth transistor Q5 is grounded, and the b electrode of the fifth transistor Q5 is connected to the MCU;

[0054] The current collection and short-circuit protection control unit includes a fourth transistor Q4;

[0055] The b-pole of the fourth transistor Q4 is connected to the S-pole of the first MOS transistor Q1 , the e-pole of the fourth transistor Q4 is grounded, and the c-pole of the fourth transistor Q4 is connected to the MCU.

[0056] It should be noted that the first MOS transistor Q1 can be a MOS transistor with a model of LT6428FJ, the second transistor Q2 can be a transistor with a model of MMBT5401, the third transistor Q3 can be a transistor with a model of MMBT5401, the fifth transistor Q5 can be a transistor with a model of MMBT5551, the second diode D2 can be a diode with a model of BAV20W, and the fourth transistor Q4 can be a transistor with a model of MMBT5551.

[0057] Please refer again Figure 1 In this embodiment, the circuit working function loop unit further includes a fuse F1 and a first resistor R1;

[0058] The fuse F1 is connected in series between the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the ground brush motor;

[0059] The first resistor R1 is connected in series between the S pole of the first MOS transistor Q1 and the total negative voltage terminal B- of the battery pack.

[0060] It should be noted that the first resistor R1 can be selected as a resistor of 25mR.

[0061] Please refer again Figure 1 In this embodiment, the circuit working function loop unit further includes a first diode D1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a thirteenth resistor R13 and a fourteenth resistor R14;

[0062] One end of the first diode D1 is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end of the first diode D1 is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor;

[0063] The third capacitor C3 and the fourth capacitor C4 are connected in series, one end of which is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor;

[0064] The first capacitor C1 and the second capacitor C2 are connected in series, one end of which is connected to the S electrode of the first MOS transistor Q1, and the other end of which is connected to the D electrode of the first MOS transistor Q1;

[0065] The one end of the thirteenth resistor R13 and the fourteenth resistor R14 connected in series is connected to the line of the battery pack total positive voltage end P+ and the ground brush motor positive access end M+ connected, and the other end is connected to the line of the battery pack total negative voltage end B- and the ground brush motor negative access end M- connected.

[0066] It should be noted that the first diode D1 can be selected as a diode of model RS1M, the first capacitor C1 can be selected as a capacitor of 100nF / 50V, the second capacitor C2 can be selected as a capacitor of 100nF / 50V, the third capacitor C3 can be selected as a capacitor of 100nF / 50V, the fourth capacitor C4 can be selected as a capacitor of 100nF / 50V, the thirteenth resistor R13 can be selected as a resistor of 100K, and the fourteenth resistor R14 can be selected as a resistor of 10K.

[0067] Please refer again to Figure 1 In the embodiment, the motor starting drive and constant voltage PWM control circuit unit further comprises a third resistor R3, a fifth resistor R5, a seventh resistor R7, a ninth resistor R9, a tenth resistor R10 and a twelfth resistor R12.

[0068] The third resistor R3 is connected in series between the e pole of the second triode Q2 and the MCU.

[0069] The fifth resistor R5 is connected in parallel between the e pole and the b pole of the second triode Q2.

[0070] The seventh resistor R7 is connected in series between the b pole of the second triode Q2 and the c pole of the fifth triode Q5.

[0071] The ninth resistor R9 is connected in series between the b pole of the fifth triode Q5 and the MCU.

[0072] The tenth resistor R10 is connected in series between the c pole of the third triode Q3 and the ground.

[0073] The twelfth resistor R12 is connected in parallel between the b pole and the e pole of the fifth triode Q5.

[0074] It should be noted that the third resistor R3 can be selected as a resistor of 100R, the fifth resistor R5 can be selected as a resistor of 10K, the seventh resistor R7 can be selected as a resistor of 10K, the ninth resistor R9 can be selected as a resistor of 1K, and the twelfth resistor R12 can be selected as a resistor of 100K.

[0075] Please refer again to Figure 1 In the embodiment, the motor starting drive and constant voltage PWM control circuit unit further comprises a second resistor R2 and a voltage stabilizing diode Z1.

[0076] One end of the second resistor R2 is connected to the S electrode of the first MOS transistor Q1, and the other end of the second resistor R2 is connected to the G electrode of the first MOS transistor Q1;

[0077] The anode of the voltage stabilizing diode Z1 is connected to the S electrode of the first MOS transistor Q1 , and the cathode of the voltage stabilizing diode Z1 is connected to the G electrode of the first MOS transistor Q1 .

[0078] It should be noted that the second resistor R2 can be a 100K resistor, and the voltage stabilizing diode Z1 can be a 16V voltage stabilizing diode.

[0079] Please refer again Figure 1 In this embodiment, the current acquisition and short-circuit protection control unit further includes a fourth resistor R4 and a fifth capacitor C5;

[0080] One end of the fourth resistor R4 is connected between the first resistor R1 and the S electrode of the first MOS transistor Q1, and the other end of the fourth resistor R4 is connected to the MCU;

[0081] One end of the fifth capacitor C5 is connected between the fourth resistor R4 and the MCU, and the other end of the fifth capacitor C5 is grounded.

[0082] It should be noted that the fourth resistor R4 can be a 1K resistor, and the fifth capacitor C5 can be a 100nF / 50V capacitor.

[0083] Please refer again Figure 1 In this embodiment, the current acquisition and short-circuit protection control unit further includes a sixth resistor R6, an eighth resistor R8, an eleventh resistor R11 and a sixth capacitor C6;

[0084] The sixth resistor R6 is connected in series between the B-pole of the fourth transistor Q4 and the S-pole of the MOS transistor Q1;

[0085] The eighth resistor R8 is connected in series between the C-pole of the fourth transistor Q4 and the MCU;

[0086] The eleventh resistor R11 is connected in parallel between the b-pole and the e-pole of the fourth transistor Q4;

[0087] The sixth capacitor C6 is connected in parallel between the b-pole and the e-pole of the fourth transistor Q4.

[0088] It should be noted that the sixth resistor R6 can be a 1K resistor, the eighth resistor R8 can be a 10K resistor, the eleventh resistor R11 can be a 100K resistor, and the sixth capacitor C6 can be a 100nF capacitor.

[0089] In this embodiment, the first capacitor C1 , the second capacitor C2 , the third capacitor C3 and the fourth capacitor C4 are filter capacitors.

[0090] It should be noted that the first diode D1 can form an internal loop with the motor when the motor stops, absorb the motor's induced electromotive force, and reduce the impact of the induced electromotive force on the circuit loop. The third capacitor C3, the fourth capacitor C4, the first capacitor C1 and the second capacitor C2 play a protective role in protecting and absorbing port ESD and surge impacts.

[0091] In this embodiment, the DO_AFE signal of the MCU is received through the e-pole of the second transistor Q2. The DO_AFE signal is used by the MCU to control the normal opening and closing actions of the first MOS transistor Q1. The high level is valid to drive the motor to start normally, and to perform the closing action when the motor is protected or shut down.

[0092] In this embodiment, the M_PWM_MCU signal of the MCU is received through the b-pole of the fifth transistor Q5. The M_PWM_MCU signal is used by the MCU to control the fifth transistor Q5. The working PWM signal is adjusted by the MCU according to the voltage of the battery pack and the voltage value set by the ground brush motor, and the functional relationship between the battery voltage and the duty cycle set by the MCU program to adjust the unit circuit PWM and control the voltage regulation output requirements.

[0093] This embodiment receives the M_CUR_MCU signal of the MCU through the fourth resistor R4. The signal is the working current signal of the ground brush motor. During the voltage stabilization process of the motor, the MCU continuously collects the working current of the motor in real time to ensure that when overcurrent, stall and short circuit protection occur during the operation of the motor, timely response can be obtained.

[0094] The accelerated shutdown circuit is primarily implemented by a second diode D2 and a third transistor Q3. When the DO_AFE signal is low or the M_PWM_MCU signal is high, shutting down the first MOS transistor Q1, the anode of the second diode D2 is low, rapidly turning on the third transistor Q3 and pulling the G terminal of the first MOS transistor Q1 from a high voltage of 12V to a low voltage, quickly shutting down the first MOS transistor Q1.

[0095] The MCU sets the functional relationship between the output voltage and the PWM duty cycle, and adjusts the corresponding PWM duty cycle according to the voltage of different voltage groups to stabilize the output voltage at around 18V, thereby achieving the effect of stabilizing the working voltage of the brush motor. When the working voltage of the motor is stable at around 18V, under the same load conditions, the effect of constant current and constant power is achieved.

[0096] In this embodiment, the BRU_SC_MCU signal of the MCU is received through the C-pole of the fourth transistor Q4. This signal is a short-circuit protection interrupt signal. When the voltage drop ΔV at the moment of the short circuit on the first resistor R1 reaches 0.6V, the fourth transistor Q4 is fully turned on, triggering the BRU_SC_MCU signal to change from a high level to a low level, triggering the short-circuit protection action and locking the output.

[0097] Although this document frequently uses terms such as the total positive voltage terminal of the battery pack, the total negative voltage terminal of the battery pack, the positive input terminal of the ground brush motor, the negative input terminal of the ground brush motor, MOS transistor, and triode, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

[0098] An embodiment of the present invention provides a floor brush motor voltage stabilization control output and protection circuit. By setting a motor power-on drive and constant voltage PWM control circuit unit, a current acquisition and short-circuit protection control unit, and a circuit working function loop unit, the coordinated cooperation of these three can achieve voltage stabilization output control of the floor brush motor. At the same time, it has the characteristics of low circuit design cost, low EMC radiation, and safe and reliable protection function, and is very worthy of adoption and promotion.

[0099] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented by way of example only and may not be limiting. Although not explicitly stated herein, those skilled in the art will understand that this application is intended to encompass various reasonable changes, improvements, and modifications to the embodiments. Such changes, improvements, and modifications are intended to be proposed by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0100] In addition, certain terms in this application have been used to describe embodiments of the present application. For example, "one embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in conjunction with that embodiment may be included in at least one embodiment of the present application. Therefore, it is emphasized and should be understood that two or more references to "an embodiment," "one embodiment," or "an alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Furthermore, particular features, structures, or characteristics may be appropriately combined in one or more embodiments of the present application.

[0101] It should be understood that in the foregoing description of the embodiments of this application, in order to facilitate understanding of a feature and to simplify this application, this application combines various features into a single embodiment, figure, or description thereof. However, this does not mean that the combination of these features is required. When reading this application, it is entirely possible for those skilled in the art to extract some of the features and understand them as separate embodiments. In other words, the embodiments of this application can also be understood as the integration of multiple secondary embodiments. This also applies when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0102] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, articles, etc., cited herein is hereby incorporated by reference in its entirety for all purposes, except for any prosecution document history related thereto, any equivalent that may be inconsistent or conflicting with this document, or any equivalent prosecution document history that may have a limiting effect on the broadest scope of the claims now or hereafter associated with this document. For example, if there is any inconsistency or conflict between the description, definition, and / or use of terms associated with any incorporated material and the terminology, description, definition, and / or use associated with this document, the terminology in this document shall control.

[0103] Finally, it should be understood that the embodiments of the application disclosed herein are illustrations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations based on the embodiments in the present application to implement the applications in the present application. Therefore, the embodiments of the present application are not limited to the embodiments precisely described in the application.

Claims

1. A floor brush motor voltage stabilization control output and protection circuit, characterized in that: It includes motor start-up drive and constant voltage PWM control circuit unit, current acquisition and short circuit protection control unit and circuit working function loop unit; among which, The circuit working function loop unit includes a battery pack total positive voltage terminal P+ and a battery pack total negative voltage terminal B- for connecting to a battery pack, and a floor brush motor positive access terminal M+ and a floor brush motor negative access terminal M- for connecting to a floor brush motor; the battery pack total positive voltage terminal P+ is connected to the floor brush motor positive access terminal M+, and the battery pack total negative voltage terminal B- is connected to the floor brush motor negative access terminal M-; The motor start-up drive and constant voltage PWM control circuit unit includes a first MOS tube Q1, a second transistor Q2, a third transistor Q3, a fifth transistor Q5 and a second diode D2; the S pole of the first MOS tube Q1 is connected to the total negative voltage terminal B- of the battery pack, the D pole of the first MOS tube Q1 is connected to the negative access terminal M- of the ground brush motor, the G pole of the first MOS tube Q1 is connected to the e pole of the third transistor Q3; the anode of the second diode D2 is connected to the c pole of the second transistor Q2 The cathode of the second diode D2 is connected to the G electrode of the first MOS transistor Q1; the b electrode of the third transistor Q3 is connected between the anode of the second diode D2 and the c electrode of the second transistor Q2, and the c electrode of the third transistor Q3 is grounded; the e electrode of the second transistor Q2 is connected to the MCU, and the b electrode of the second transistor Q2 is connected to the c electrode of the fifth transistor Q5; the e electrode of the fifth transistor Q5 is grounded, and the b electrode of the fifth transistor Q5 is connected to the MCU; The current collection and short-circuit protection control unit includes a fourth transistor Q4; The b-pole of the fourth transistor Q4 is connected to the S-pole of the first MOS transistor Q1 , the e-pole of the fourth transistor Q4 is grounded, and the c-pole of the fourth transistor Q4 is connected to the MCU.

2. The floor brush motor voltage stabilization control output and protection circuit according to claim 1 is characterized in that: The circuit working function loop unit further includes a fuse F1 and a first resistor R1; The fuse F1 is connected in series between the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the ground brush motor; The first resistor R1 is connected in series between the S pole of the first MOS transistor Q1 and the total negative voltage terminal B- of the battery pack.

3. The floor brush motor voltage stabilization control output and protection circuit according to claim 2, characterized in that: The circuit working function loop unit further includes a first diode D1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a thirteenth resistor R13 and a fourteenth resistor R14; One end of the first diode D1 is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end of the first diode D1 is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor; The third capacitor C3 and the fourth capacitor C4 are connected in series, one end of which is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor; The first capacitor C1 and the second capacitor C2 are connected in series, one end of which is connected to the S electrode of the first MOS transistor Q1, and the other end of which is connected to the D electrode of the first MOS transistor Q1; One end of the thirteenth resistor R13 and the fourteenth resistor R14 connected in series is connected to the line connecting the total positive voltage terminal P+ of the battery pack and the positive access terminal M+ of the floor brush motor, and the other end is connected to the line connecting the total negative voltage terminal B- of the battery pack and the negative access terminal M- of the floor brush motor.

4. The floor brush motor voltage stabilization control output and protection circuit according to claim 3, characterized in that: The motor start-up drive and constant voltage PWM control circuit unit further includes a third resistor R3, a fifth resistor R5, a seventh resistor R7, a ninth resistor R9, a tenth resistor R10 and a twelfth resistor R12; The third resistor R3 is connected in series between the e-pole of the second transistor Q2 and the MCU; The fifth resistor R5 is connected in parallel between the e-pole and the b-pole of the second transistor Q2; The seventh resistor R7 is connected in series between the b-pole of the second transistor Q2 and the c-pole of the fifth transistor Q5; The ninth resistor R9 is connected in series between the b-pole of the fifth transistor Q5 and the MCU; The tenth resistor R10 is connected in series between the C-pole of the third transistor Q3 and the ground; The twelfth resistor R12 is connected in parallel between the b-pole and the e-pole of the fifth transistor Q5.

5. The floor brush motor voltage stabilization control output and protection circuit according to claim 4, characterized in that: The motor start-up drive and constant voltage PWM control circuit unit further includes a second resistor R2 and a voltage stabilizing diode Z1; One end of the second resistor R2 is connected to the S electrode of the first MOS transistor Q1, and the other end of the second resistor R2 is connected to the G electrode of the first MOS transistor Q1; The anode of the voltage stabilizing diode Z1 is connected to the S electrode of the first MOS transistor Q1 , and the cathode of the voltage stabilizing diode Z1 is connected to the G electrode of the first MOS transistor Q1 .

6. The floor brush motor voltage stabilization control output and protection circuit according to claim 5, characterized in that: The current collection and short-circuit protection control unit further includes a fourth resistor R4 and a fifth capacitor C5; One end of the fourth resistor R4 is connected between the first resistor R1 and the S electrode of the first MOS transistor Q1, and the other end of the fourth resistor R4 is connected to the MCU; One end of the fifth capacitor C5 is connected between the fourth resistor R4 and the MCU, and the other end of the fifth capacitor C5 is grounded.

7. The floor brush motor voltage stabilization control output and protection circuit according to claim 6, characterized in that: The current collection and short-circuit protection control unit further includes a sixth resistor R6, an eighth resistor R8, an eleventh resistor R11 and a sixth capacitor C6; The sixth resistor R6 is connected in series between the B-pole of the fourth transistor Q4 and the S-pole of the MOS transistor Q1; The eighth resistor R8 is connected in series between the C-pole of the fourth transistor Q4 and the MCU; The eleventh resistor R11 is connected in parallel between the b-pole and the e-pole of the fourth transistor Q4; The sixth capacitor C6 is connected in parallel between the b-pole and the e-pole of the fourth transistor Q4.

8. The floor brush motor voltage stabilization control output and protection circuit according to claim 6, characterized in that: The first capacitor C1 , the second capacitor C2 , the third capacitor C3 and the fourth capacitor C4 are filter capacitors.

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