Low-power-consumption motor control circuit and controller

Abstract

The utility model relates to a low-power-consumption motor control circuit and a controller. The low-power-consumption motor control circuit comprises a battery pack module, an MCU control module, a key module and a switch module, the switch module comprises a first MOS (Metal Oxide Semiconductor) tube and a second MOS tube; when the motor is powered on, the button module is started, the first MOS tube is conducted, the battery pack module supplies power to the MCU control module, the MCU control module controls the second MOS tube to be conducted, the first MOS tube keeps being conducted, and the MCU control module is continuously powered on to control the motor. According to the low-power-consumption motor control circuit and the low-power-consumption motor control controller, the button module is used for starting the switch module, then the MCU control module after being powered on is used for controlling the switch module, on the basis that a motor can be controlled in time, the motor controller does not consume energy of a battery pack when not working, low-power-consumption motor control is achieved, and the low-power-consumption motor control is achieved. The method has the advantages of system coordination and convenient switching.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control circuits, in particular to a low-power motor control circuit and a controller. Background Art

[0002] At present, there has been some research on low-power operation of motors and low-power wake-up of battery packs.

[0003] However, when the battery pack is powering the motor, it will also be powering the motor controller. The motor controller has no low-power function and will continue to consume the energy of the battery pack when there is no need to control the motor, causing the battery pack to lose power faster, thus affecting the effective use of the battery pack energy.

[0004] Regardless of whether another power supply is used to power the controller, or an additional device is installed on the controller to divide it into different power consumption modes, there is a lack of overall coordination of the system and convenience of switching power consumption modes.

[0005] Therefore, providing a method for solving the above-mentioned technical problems is a problem that technical personnel in the field currently need to solve. Utility Model Content

[0006] The technical problem to be solved by the utility model is that the prior art lacks a motor controller with a built-in low-power consumption function. A low-power consumption motor control circuit and controller are provided. On the basis of being able to control the motor in a timely manner, the motor controller will not consume the energy of the battery pack when not working, thereby realizing low-power consumption motor control. The utility model has the advantages of using a small number of components, convenient system coordination and switching.

[0007] In the first aspect, in order to solve the above technical problems, the embodiment of the utility model provides a low-power motor control circuit, including a battery pack module, an MCU control module, a key module, and a switch module; wherein,

[0008] The battery pack module includes a battery pack, a positive pole of a power line, and a negative pole of a power line; the battery pack module is used to supply power to the MCU control module;

[0009] The MCU control module includes a power-on pin POWER_ON and a power supply pin PP+; the MCU control module is used to control the motor and the switch module;

[0010] The key module includes n groups of key switches, and the key module is turned on when any group of key switches is turned on; the key module is used to start the switch module;

[0011] The switch module includes a first MOS tube and a second MOS tube; the source of the first MOS tube is connected to the positive electrode of the power line, the drain of the first MOS tube is connected to the power supply pin PP+, the gate of the first MOS tube is connected to the drain of the second MOS tube, the gate of the second MOS tube is connected to the power-on pin POWER_ON, the source of the second MOS tube is connected to the negative electrode of the power line, and the negative electrode of the power line is grounded;

[0012] When the button module is not started, the first MOS tube is turned off, and the battery pack module does not supply power to the MCU control module; when the button module is started, the first MOS tube is turned on, the battery pack module supplies power to the MCU control module, the MCU control module controls the second MOS tube to be turned on, the first MOS tube is maintained in a conducting state, the battery pack module continues to supply power to the MCU control module, and the MCU control module is able to control the motor.

[0013] In one embodiment of the present invention, the first MOS tube is a PMOS tube, and the second MOS tube is an NMOS tube;

[0014] A first resistor is connected in series between the source and the gate of the first MOS tube, a second resistor is connected in series between the gate of the first MOS tube and the drain of the second MOS tube, and a third resistor is connected in series between the gate of the second MOS tube and the negative electrode of the power line.

[0015] In one embodiment of the utility model, a first diode and a fourth resistor are connected in series between the gate of the second MOS tube and the power-on pin POWER_ON; wherein the power-on pin POWER_ON is connected to the anode of the first diode, the cathode of the first diode is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the gate of the second MOS tube.

[0016] In one embodiment of the utility model, the first end of the fourth resistor is also connected to the cathode of the second diode; the anode of the second diode is connected to the first end of the fifth resistor; the battery pack module also includes a charging signal line, and the second end of the fifth resistor is connected to the charging signal line.

[0017] In one embodiment of the utility model, the anode of the second diode is also connected to the gate of the third MOS tube; the source of the third MOS tube is grounded; the MCU control module further includes a charging mode pin CHG_MODE, the drain of the third MOS tube is connected to the charging mode pin CHG_MODE; the drain of the third MOS tube is also connected to a sixth resistor, and the other end of the sixth resistor is connected to a pull-up level;

[0018] Wherein, the third MOS tube is an NMOS tube, and a seventh resistor is connected in series between the gate and the source of the third MOS tube;

[0019] When the charging mode pin CHG_MODE receives a charging mode input signal, the MCU control module controls the motor not to run, thereby protecting the motor and the battery pack in the charging mode.

[0020] In an embodiment of the present invention, the drain of the second MOS tube is connected to the anode of the third diode; and the cathode of the third diode is connected to the key module.

[0021] In one embodiment of the utility model, the n groups of push switches are connected in parallel, one end of the n groups of push switches is connected to the cathode of the third diode, and the other end is grounded; and an equal value resistor is connected in series between every two of the push switches.

[0022] In one embodiment of the utility model, the cathode of the third diode is also connected to the cathode of the fourth diode; the MCU control module further includes a detection pin AD_KEY, the anode of the fourth diode is connected to the detection pin AD_KEY, the anode of the fourth diode is also connected to the eighth resistor, and the other end of the eighth resistor is connected to the pull-up level; wherein a capacitor is connected in series between the anode of the third diode and the source of the second MOS tube, for filtering and de-jittering the multi-key signal provided by the key module;

[0023] The detection pin AD_KEY is used to transmit the multi-key signal, which is used for the MCU control module to control the speed of the motor.

[0024] In one embodiment of the utility model, the MCU control module further includes m LED lamp pins, which correspond to m LED lamps respectively; the LED lamp pins are connected in series with an LED lamp through a resistor; and the LED lamps are grounded;

[0025] The m LED lights are used to display the m levels of power of the battery pack.

[0026] In a second aspect, in order to solve the above technical problems, the present invention also provides a low-power motor controller, including a control circuit board, and the low-power motor control circuit, wherein the low-power motor control circuit is arranged on the control circuit board.

[0027] The above technical solution of the utility model has at least the following advantages compared with the prior art:

[0028] This embodiment provides a low-power motor control circuit and controller, uses a button module to start the switch module, and then controls the switch module by the MCU control module after power is supplied. On the basis of being able to control the motor in a timely manner, the motor controller will not consume the energy of the battery pack when not working, thereby realizing low-power motor control, and having the advantages of using a small number of components, system coordination and convenient switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0030] Figure 1 It is a circuit schematic diagram of a low-power motor control circuit in an embodiment of the utility model;

[0031] Figure 2 It is a partial circuit schematic diagram of the low-power motor control circuit in the embodiment of the utility model when entering the charging mode;

[0032] Figure 3 It is a schematic diagram of a button module and an LED lamp in an embodiment of the utility model.

[0033] Description of the Figures in the Specification:

[0034] B+power line positive pole, B-power line negative pole; P+battery pack voltage;

[0035] PP+ power supply pin; POWER_ON power supply pin;

[0036] CHG_MODE_IN charging mode input signal; CHG charging signal; CHG_MODE charging mode pin;

[0037] SW+ key signal; AD_KEY detection pin;

[0038] Q1 is the first MOS tube, d1, s1, g1 are the drain, source and gate of the first MOS tube;

[0039] Q2 is the second MOS tube, d2, s2, g2 are the drain, source and gate of the second MOS tube;

[0040] Q3 is the third MOS tube, d3, s3, g3 are the drain, source and gate of the first MOS tube;

[0041] D1 is the first diode; D2 is the second diode; D3 is the third diode; D4 is the fourth diode;

[0042] SW1, SW2, SW3: key switches;

[0043] LED1, LED2, LED3, LED4: LED lights;

[0044] C1 capacitor; R1 first resistor; R2 second resistor; R3 third resistor; R4 fourth resistor; R5 fifth resistor; R6 sixth resistor; R7 seventh resistor; R8 eighth resistor; R9 ninth resistor; R10 tenth resistor; R11 eleventh resistor; R12 twelfth resistor; R13 thirteenth resistor; R14 fourteenth resistor. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0046] Embodiment 1

[0047] This embodiment provides a low-power motor control circuit, including a battery pack module, an MCU control module, a key module, and a switch module; wherein:

[0048] The battery pack module includes a battery pack, a positive pole of a power line, and a negative pole of a power line; the battery pack module is used to supply power to the MCU control module;

[0049] The MCU control module includes a power-on pin POWER_ON and a power supply pin PP+; the MCU control module is used to control the motor and the switch module;

[0050] The key module includes n groups of key switches, and the key module is turned on when any group of key switches is turned on; the key module is used to start the switch module;

[0051] The switch module includes a first MOS tube and a second MOS tube; the source of the first MOS tube is connected to the positive electrode of the power line, the drain of the first MOS tube is connected to the power supply pin PP+, the gate of the first MOS tube is connected to the drain of the second MOS tube, the gate of the second MOS tube is connected to the power-on pin POWER_ON, the source of the second MOS tube is connected to the negative electrode of the power line, and the negative electrode of the power line is grounded;

[0052] When the button module is not started, the first MOS tube is turned off, and the battery pack module does not supply power to the MCU control module; when the button module is started, the first MOS tube is turned on, the battery pack module supplies power to the MCU control module, the MCU control module controls the second MOS tube to be turned on, the first MOS tube is maintained in a conducting state, the battery pack module continues to supply power to the MCU control module, and the MCU control module is able to control the motor.

[0053] This embodiment provides a low-power motor control circuit, uses a button module to start the switch module, and then controls the switch module by the MCU control module after power is supplied. On the basis of being able to control the motor in a timely manner, the motor controller will not consume the energy of the battery pack when not working, thereby realizing low-power motor control, and having the advantages of using a small number of components, system coordination and convenient switching.

[0054] The low-power motor control circuit described in this embodiment is introduced in detail below:

[0055] Please refer to Figure 1 As shown, the voltage of the battery pack is P+, the positive electrode B+ of the power line is connected to the source electrode s1 of the first MOS tube Q1, and the drain electrode d1 of the first MOS tube Q1 is connected to the power supply pin PP+ of the MCU control module;

[0056] Working principle 1: When the first MOS tube Q1 is turned off, the battery pack module does not supply power to the MCU control module; when the first MOS tube Q1 is turned on, the battery pack module supplies power to the MCU control module, and the voltage at PP+ is the same as that at P+ at this time; when the battery pack module does not supply power to the MCU control module, it is in low power consumption mode.

[0057] Further, the source s1 of the first MOS tube Q1 is also connected to the first end of the first resistor R1, the gate g1 of the first MOS tube Q1 is connected to the second end of the first resistor R1, the second end of the first resistor R1 is also connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the drain d2 of the second MOS tube Q2, the source s2 of the second MOS tube Q2 is connected to the negative electrode B- of the power line, the negative electrode B- of the power line is grounded, and a third resistor R3 is connected in series between the gate g2 of the second MOS tube Q2 and the negative electrode B- of the power line;

[0058] Furthermore, a first diode D1 and a fourth resistor R4 are connected in series between the gate g2 of the second MOS transistor Q2 and the power-on pin POWER_ON; wherein the power-on pin POWER_ON is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected to the gate g2 of the second MOS transistor Q2;

[0059] Furthermore, the drain electrode d2 of the second MOS tube is also connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the key module. Figure 1 SW+ shown in is the key signal;

[0060] Working principle 2: When the key signal SW+ appears, the cathode of the third diode D3 is grounded. Because the first MOS tube Q1 is a PMOS tube, the first MOS tube Q1 is turned on at this time, and the battery pack module supplies power to the MCU control module; after the MCU control module is powered, it turns on the power pin POWER_ON to output a high level; because the second MOS tube Q2 is an NMOS tube, the second MOS tube Q2 is turned on at this time, which is equivalent to the anode of the third diode D3 being grounded, and the first MOS tube Q1 is therefore maintained in a conducting state, and the battery pack module continues to supply power to the MCU module; this is the working mode.

[0061] Furthermore, the first end of the fourth resistor R4 is also connected to the cathode of the second diode D2; the anode of the second diode D2 is connected to the first end of the fifth resistor R5; the battery pack module also includes a charging signal line, and the second end of the fifth resistor R5 is connected to the charging signal line.

[0062] Further, the anode of the second diode D2 is also connected to the gate g3 of the third MOS tube Q3; the source s3 of the third MOS tube Q3 is grounded; the MCU control module further includes a charging mode pin CHG_MODE, the drain d3 of the third MOS tube Q3 is connected to the charging mode pin CHG_MODE; the drain d3 of the third MOS tube Q3 is also connected to a sixth resistor R6, and the other end of the sixth resistor R6 is connected to a 5V level; wherein the third MOS tube Q3 is an NMOS tube, and a seventh resistor R7 is connected in series between the gate g3 and the source s3 of the third MOS tube Q3;

[0063] Working principle three: On the one hand, Figure 2 In the embodiment, when the charging signal line gives a charging mode input signal CHG_MODE_IN, the cathode of the second diode D2 outputs a charging signal CHG. Figure 1 As shown, the charging signal CHG is input from the first end of the fourth resistor R4, so that the second MOS tube Q2 is turned on, achieving the same continuous power supply effect as the second working principle; on the other hand, Figure 2 In the embodiment, when the charging signal line gives a charging mode input signal CHG_MODE_IN, the third MOS tube Q3 is turned on, and the signal received by the charging mode pin CHG_MODE changes from a high level of 5V to a low level, and the MCU control module controls the motor not to run, thereby protecting the motor and the battery pack in the charging mode; this is the charging mode.

[0064] The n groups of key switches are connected in parallel, one end of the n groups of key switches being connected in parallel is connected to the cathode of the third diode, and the other end is grounded; and an equal value resistor is connected in series between every two of the key switches;

[0065] Specifically, the key module includes n key switches and n-1 equivalent resistors; the key switches are all grounded; one end of the key switch connected to the ground is defined as terminal one, and the other end is defined as terminal two, and the key switch whose terminal two is connected to the cathode of the third diode D3 is defined as the first key switch; the second key switch connected in series with the equivalent resistor is connected in parallel with the first key switch; the third key switch connected in series with the equivalent resistor is connected in parallel with the second key switch; and so on, the nth key switch connected in series with the equivalent resistor is connected in parallel with the n-1th key switch; Figure 3 In the description, the three key switches SW1, SW2 and SW3 are taken as examples, and the thirteenth resistor R13 and the fourteenth resistor R14 are equal value resistors;

[0066] For further information, please refer to Figure 1 , the cathode of the third diode D3 is also connected to the cathode of the fourth diode D4; the MCU control module also includes a detection pin AD_KEY, the anode of the fourth diode D4 is connected to the detection pin AD_KEY, the anode of the fourth diode D4 is also connected to the eighth resistor R8, and the other end of the eighth resistor R8 is connected to a 5V level; wherein a capacitor C1 is connected in series between the anode of the fourth diode D4 and the source s2 of the second MOS tube Q2, for filtering and de-jittering the multi-key signal provided by the key module;

[0067] Working Principle 4: When the detection pin AD_KEY is just powered on, its voltage is close to 5V level and is a high level; when any one of the key switches SW1, SW2, and SW3 is pressed, the level of the detection pin AD_KEY is converted to the voltage drop of the fourth diode D4, and the voltage drop is a low level; the MCU control module detects the signal transmitted by the detection pin AD_KEY and runs the corresponding power set by the software; after any one of the key switches is released, the voltage of the detection pin AD_KEY becomes a high level close to 5V again;

[0068] Combined with the second working principle, it can be known that in the actual operation process, any one of the key switches can be used to start the control circuit, and then the key switch corresponding to the required power can be pressed, so that the MCU control module runs the corresponding power set by the software, thereby realizing the speed regulation of the motor, which has the advantages of system coordination and convenient switching;

[0069] Among them, the correspondence between different key switches and power is realized by the voltage division between the eighth resistor R8 and the equivalent resistors R13 and R14. The MCU control module determines which key switch is pressed according to the different detected voltages, thereby running the corresponding power; the multi-key signal is a voltage signal.

[0070] The MCU control module further includes m LED lamp pins, which correspond to m LED lamps respectively; the LED lamp pins are connected in series with an LED lamp through a resistor; the LED lamps are grounded; the m LED lamps are used to display the m grid power of the battery pack;

[0071] For further information, please refer to Figure 3 , four LED lamps, LED1, LED2, LED3, LED4, are respectively connected to the LED lamp pins of the MCU control module through a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R12, and the other ends of the LED lamps are grounded;

[0072] Working principle five: the four LED lights correspond to the four power levels of the battery pack, and the LED lights are all on when the battery pack is fully charged; when the battery pack is discharging, the button switch is not pressed, and the LED lights do not display the power level of the battery pack; when the battery pack is discharging, after pressing any button switch to start the control circuit, the LED lights display the power level of the battery pack; when the battery pack is charging, the LED lights display the power level of the battery pack.

[0073] To sum up, this embodiment provides a low-power motor control circuit, in which the button module is used to start the switch module, and the switch module is then controlled by the MCU control module after being powered on. On the basis of being able to control the motor in a timely manner, the motor controller will not consume the energy of the battery pack when it is not working, thereby realizing low-power motor control, which has the advantages of using a small number of components, system coordination and convenient switching.

[0074] Embodiment 2

[0075] This embodiment provides a low-power motor controller, including a control circuit board, and the low-power motor control circuit as described above, wherein the low-power motor control circuit is arranged on the control circuit board.

[0076] For an introduction to a low-power motor controller provided in this embodiment, please refer to the above embodiment, and this embodiment will not be described in detail here.

[0077] The low-power motor controller provided in this embodiment has the same beneficial effects as the above-mentioned low-power motor control circuit.

[0078] It should be understood that although the terms “first”, “second”, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0079] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A low-power motor control circuit, characterized in that: It includes battery pack module, MCU control module, key module and switch module; among them, The battery pack module includes a battery pack, a positive pole of a power line, and a negative pole of a power line; the battery pack module is used to supply power to the MCU control module; The MCU control module includes a power-on pin (POWER_ON) and a power supply pin (PP+); the MCU control module is used to control the motor and the switch module; The key module includes n groups of key switches, and the key module is turned on when any group of key switches is turned on; the key module is used to start the switch module; The switch module includes a first MOS tube and a second MOS tube; the source of the first MOS tube is connected to the positive electrode of the power line, the drain of the first MOS tube is connected to the power supply pin (PP+), the gate of the first MOS tube is connected to the drain of the second MOS tube, the gate of the second MOS tube is connected to the power-on pin (POWER_ON), ​​the source of the second MOS tube is connected to the negative electrode of the power line, and the negative electrode of the power line is grounded; When the button module is not started, the first MOS tube is turned off, and the battery pack module does not supply power to the MCU control module; when the button module is started, the first MOS tube is turned on, the battery pack module supplies power to the MCU control module, the MCU control module controls the second MOS tube to be turned on, the first MOS tube is maintained in a conducting state, the battery pack module continues to supply power to the MCU control module, and the MCU control module is able to control the motor.

2. The low-power motor control circuit according to claim 1, characterized in that: The first MOS tube is a PMOS tube, and the second MOS tube is an NMOS tube; A first resistor is connected in series between the source and the gate of the first MOS tube, a second resistor is connected in series between the gate of the first MOS tube and the drain of the second MOS tube, and a third resistor is connected in series between the gate of the second MOS tube and the negative electrode of the power line.

3. The low-power motor control circuit according to claim 1 or 2, characterized in that: A first diode and a fourth resistor are connected in series between the gate of the second MOS tube and the power-on pin (POWER_ON); wherein the power-on pin (POWER_ON) is connected to the anode of the first diode, the cathode of the first diode is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the gate of the second MOS tube.

4. The low-power motor control circuit according to claim 3, characterized in that: The first end of the fourth resistor is also connected to the cathode of the second diode; the anode of the second diode is connected to the first end of the fifth resistor; the battery pack module also includes a charging signal line, and the second end of the fifth resistor is connected to the charging signal line.

5. The low-power motor control circuit according to claim 4, characterized in that: The anode of the second diode is also connected to the gate of the third MOS tube; the source of the third MOS tube is grounded; the MCU control module also includes a charging mode pin (CHG_MODE), the drain of the third MOS tube is connected to the charging mode pin (CHG_MODE); the drain of the third MOS tube is also connected to a sixth resistor, and the other end of the sixth resistor is connected to a pull-up level; wherein the third MOS tube is an NMOS tube, and a seventh resistor is connected in series between the gate and the source of the third MOS tube; When the charging mode pin (CHG_MODE) receives a charging mode input signal, the MCU control module controls the motor not to run, thereby protecting the motor and the battery pack in the charging mode.

6. The low-power motor control circuit according to claim 1 or 2, characterized in that: The drain of the second MOS tube is connected to the anode of the third diode; the cathode of the third diode is connected to the key module.

7. The low-power motor control circuit according to claim 6, characterized in that: The n groups of key switches are connected in parallel, one end of the n groups of key switches is connected to the cathode of the third diode, and the other end is grounded; and an equal value resistor is connected in series between every two of the key switches.

8. The low-power motor control circuit according to claim 7, characterized in that: The cathode of the third diode is also connected to the cathode of the fourth diode; the MCU control module also includes a detection pin (AD_KEY), the anode of the fourth diode is connected to the detection pin (AD_KEY), the anode of the fourth diode is also connected to the eighth resistor, and the other end of the eighth resistor is connected to the pull-up level; wherein a capacitor is connected in series between the anode of the third diode and the source of the second MOS tube, for filtering and de-jittering the multi-key signal provided by the key module; The detection pin (AD_KEY) is used to transmit the multi-key signal, which is used for the MCU control module to control the speed of the motor.

9. The low-power motor control circuit according to claim 1 or 2, characterized in that: The MCU control module further includes m LED lamp pins, which correspond to m LED lamps respectively; each of the LED lamp pins is connected in series with an LED lamp through a resistor; and each of the LED lamps is grounded; The m LED lights are used to display the m levels of power of the battery pack.

10. A low-power motor controller, characterized in that: It comprises a control circuit board and a low-power motor control circuit as claimed in any one of claims 1 to 9, wherein the low-power motor control circuit is arranged on the control circuit board.

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