Brushless motor controlled by single bus

Abstract

The utility model discloses a brushless motor controlled by a single bus. The brushless motor comprises a brushless motor body and an intelligent control panel. An MCU, a brushless motor driving chip and a first communication circuit used for communicating with a control host are arranged on the intelligent control panel, the MCU is connected with the first communication circuit, and the MCU is connected with a first power supply interface; the first communication circuit is connected with a first communication control interface; the first communication control interface is used for being connected with a second communication control interface on a single communication bus, and the first power supply interface is used for being connected with a second power supply interface on a group of power lines; the MCU is connected with the brushless motor driving chip through a second communication circuit, the brushless motor driving chip is connected to the brushless motor body, control between the control host and the brushless motor body can be achieved only through a single bus, and the system control complex program and wiring cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motor bodies, in particular to a single-bus controlled brushless motor. Background Art

[0002] Brushless DC motors have been widely used in social production activities. However, the standard control interface of the brushless DC motor driver circuit board is 5-wire or 6-wire, and the wiring is relatively complicated. Especially when multiple brushless motors are required, a multi-pin MCU is often used as a host motherboard for centralized control. The system wiring workload is large, complex and extremely costly.

[0003] Therefore, in the present utility model patent application, the applicant has carefully studied a single bus controlled brushless motor to solve the above problems. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a single-bus controlled brushless motor, which only requires a single bus to realize the control between the control host and the brushless motor body, thereby reducing the complex system control procedures and wiring costs; it can also monitor the amplitude of massage vibrations; and it can also reflect the sleep quality of the human body.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A single bus controlled brushless motor comprises a brushless motor body and an intelligent control board;

[0007] The intelligent control board is provided with an MCU, a brushless motor driver chip, and a first communication circuit for communicating with the control host. The MCU is connected to the first communication circuit, and the MCU is connected to a first power supply interface; the first communication circuit is connected to a first communication control interface; the first communication control interface is used to connect to a second communication control interface on a single communication bus, and the first power supply interface is used to connect to a second power supply interface on a group of power lines;

[0008] The MCU and the brushless motor driver chip are connected via a second communication circuit, and the brushless motor driver chip is connected to the brushless motor body. As a preferred embodiment, the first communication circuit includes a transmitting circuit and a receiving circuit. The receiving circuit is used to convert signals on the single communication bus into signals recognizable by the MCU of the intelligent control board. The transmitting circuit is used to convert signals sent by the MCU of the intelligent control board into bus signals, which are transmitted via the single communication bus for recognition and processing by the control host.

[0009] As a preferred solution, the transmitting circuit includes a transistor Q2, a resistor R9 and a resistor R12;

[0010] The base of the transistor Q2 is connected to the MCU via the resistor R9. The base of the transistor Q2 is also connected to the emitter of the transistor Q2 via the resistor R12. The emitter of the transistor Q2 is grounded. The collector of the transistor Q2 is connected to the first communication control interface.

[0011] As a preferred solution, the receiving circuit includes a transistor Q1, a resistor R8, a resistor R5, a resistor R10 and a capacitor C10;

[0012] The base of the transistor Q1 is connected to the first communication control interface through the resistor R8. The base of the transistor Q1 is also connected to the emitter of the transistor Q2 through the resistor R10. The emitter of the transistor Q1 is grounded. The capacitor C10 and the resistor R10 are connected in parallel. One end of the resistor R5 is used to connect to the 3.3V voltage terminal. The other end of the resistor R5 is connected to the collector of the transistor Q1. The collector of the transistor Q1 is connected to the MCU.

[0013] As a preferred solution, the transmitting circuit includes a resistor R4, a resistor R5, a transistor Q2, a resistor R2, a transistor Q3 and a diode D2;

[0014] The MCU is connected to the base of the transistor Q2 through the resistor R4, the base of the transistor Q2 is connected to the emitter of the transistor Q2 through the resistor R5, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the base of the transistor Q3, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R2, the emitter of the transistor Q3 is used to connect to the VCC2 voltage terminal, the collector of the transistor Q3 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the first communication control interface.

[0015] As a preferred solution, the receiving circuit includes a resistor R13, a resistor R15, a transistor Q6, a transistor Q8, a resistor R8, a resistor R10 and a resistor R14;

[0016] Resistor R14 and resistor R10 are connected in series, the non-series node of resistor R14 is connected to the MCU, the series node of resistor R14 and resistor R10 is connected to the collector of transistor Q8, the non-series node of resistor R10 is used to connect to the 3.3V voltage terminal, the base of transistor Q8 and one end of resistor R8 are both connected to the collector of transistor Q6, the other end of resistor R8 is used to connect to the 3.3V voltage terminal, the base of transistor Q8 is connected to the first communication control interface, the base of transistor Q8 is also grounded through resistor R15, and the emitters of both transistor Q8 and transistor Q6 are grounded.

[0017] Compared with the existing technology, the utility model has obvious advantages and beneficial effects: it mainly integrates the MCU, the brushless motor driver chip, the first communication control interface, the first power supply interface and the first communication circuit on the intelligent control board, so that the control between the control host and the brushless motor body only requires a single bus, reducing the complex system control program and wiring costs;

[0018] Secondly, the intelligent control board is set on the brushless motor body and the acceleration sensor is set on the intelligent control board. On the one hand, it can be used for posture recognition of the brushless motor body. On the other hand, it can realize vibration monitoring of its location when the brushless motor body is not working.

[0019] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a connection block diagram of the intelligent control board of an embodiment of the present utility model;

[0021] Figure 2 This is a circuit diagram of the intelligent control board according to an embodiment of the present utility model;

[0022] Figure 3 This is a circuit diagram of a control host according to an embodiment of the present utility model;

[0023] Figure 4 This is a block diagram of the connection between the intelligent control panel and the control host according to another embodiment of the present invention;

[0024] Figure 5 It corresponds to Figure 4 Circuit schematic diagram.

[0025] Description of the accompanying drawings:

[0026] 11. Brushless motor driver chip

[0027] 12. First communication circuit

[0028] 13. MCU

[0029] 14. Accelerometer

[0030] 15. First communication control interface

[0031] 16. Second communication circuit

[0032] 17. Brushless motor body DETAILED DESCRIPTION

[0033] Please refer to Figures 1 to 5 As shown, it shows the specific structure of an embodiment of the present utility model.

[0034] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0035] A single bus controlled brushless motor is mainly but not limited to use in an intelligent electric bed and cooperates with its control host.

[0036] The intelligent control board is provided with an MCU 13, a brushless motor driver chip 11, a first communication circuit 12 for communicating with a control host, and an acceleration sensor 14. The MCU 13 is connected to the first communication circuit 12 and the acceleration sensor 14 respectively. The MCU 13 is connected to a first power supply interface; the first communication circuit 12 is connected to a first communication control interface 15; the first communication control interface 15 is used to connect to a second communication control interface on a single communication bus, and the first power supply interface is used to connect to a second power supply interface on a group of power lines;

[0037] The MCU 13 is connected to the brushless motor driver chip 11 via a second communication circuit 16, and the brushless motor driver chip 11 is connected to the brushless motor body 17. The second communication circuit 16 can be a conventional I2C bus protocol communication, or it can be implemented by directly using the IO pins of the MCU 13 to drive the speed control pin SPEED and direction pin DIR of the brushless motor driver chip 11 and receive the speed feedback pin FG signal, for example. Figure 2 shown.

[0038] When the brushless motor driver chip 11 drives the brushless motor body 17 to provide a vibration massage, the acceleration sensor 14 provides feedback data to measure the vibration of the corresponding motor itself, which is used to monitor the amplitude of the massage vibration. When the brushless motor driver chip 11 stops driving the brushless motor body 17, vibrations other than the corresponding brushless motor body 17 can be measured, namely the movement of the human body on the bed board, which can reflect the person's sleep quality. In other words, the feedback data from the acceleration sensor 14 is used to monitor the sleep state. Furthermore, when the intelligent control board is fixed inside or outside the housing of the brushless motor body 17, it can measure parameters such as the vibration value and tilt angle of the brushless motor body 17.

[0039] The first communication circuit 12 includes a sending circuit and a receiving circuit. The receiving circuit is used to convert the signal on the single communication bus into a signal that can be recognized by the MCU 13 of the intelligent control board. The sending circuit is used to convert the signal sent by the MCU 13 of the intelligent control board into a bus signal, which is transmitted via the single communication bus for recognition and processing by the control host.

[0040] In this embodiment, if Figure 2 As shown, the sending circuit includes a transistor Q2, a resistor R9 and a resistor R12; the base of the transistor Q2 is connected to the MCU 13 through the resistor R9, and the base of the transistor Q2 is also connected to the emitter of the transistor Q2 through the resistor R12, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected to the first communication control interface 15.

[0041] The receiving circuit includes a transistor Q1, a resistor R8, a resistor R5, a resistor R10 and a capacitor C10;

[0042] The base of the transistor Q1 is connected to the first communication control interface 15 through the resistor R8. The base of the transistor Q1 is also connected to the emitter of the transistor Q2 through the resistor R10. The emitter of the transistor Q1 is grounded. The capacitor C10 and the resistor R10 are connected in parallel. One end of the resistor R5 is used to connect to the 3.3V voltage terminal. The other end of the resistor R5 is connected to the collector of the transistor Q1. The collector of the transistor Q1 is connected to the MCU 13.

[0043] It should be noted that the communication circuit of the control host cooperates with the first communication circuit 12, such as Figure 3As shown, the communication circuit of the control host includes a resistor R3, a resistor R1, a resistor R66, a resistor R67, a resistor R4, a resistor R51, a resistor R21, a resistor R7, a diode D4, a transistor Q10, a first operational amplifier and a second operational amplifier; the resistor R3 and the resistor R1 are connected in series, the non-series node of the resistor R3, the emitter of the transistor Q10 and the pin 4 of the first operational amplifier are all grounded, the non-series node of the resistor R1 and the pin 8 of the first operational amplifier are both used to connect to the 5V voltage terminal, the series node of the resistor R3 and the resistor R1 is connected to the pin 3 of the first operational amplifier, one end of the resistor R66 is used to connect to the TX pin of the control host, the other end of the resistor R66 and the collector of the transistor Q10 are both connected to the pin 2 of the first operational amplifier, and one end of the resistor R67 is used to connect to the EN pin of the control host. Pin, the other end of resistor R67 is connected to the base of transistor Q10, the base of transistor Q10 is connected to the emitter of transistor Q10 through resistor R68, resistors R21 and R7 are connected in series, pin 1 of the first operational amplifier is connected to the non-series node of resistor R21, the series node of resistors R21 and resistor R7 is connected to pin 1 of the first interface 13, the cathode of diode D4 is connected to the series node of resistors R21 and resistor R7; resistors R4 and resistor R5 are connected in series, the non-series node of resistor R5 is used to connect to the 5V voltage terminal, the non-series node of resistor R4 and the positive electrode of diode D4 are both grounded, the series node of resistors R4 and resistor R5 is connected to pin 5 of the second operational amplifier, pin 6 of the second operational amplifier is connected to the non-series node of resistor R7, and pin 7 of the second operational amplifier is used to connect to the RX pin of the control host. Pin 3 of the first interface 13 is grounded through diode D100, the cathode of diode D100 is connected to pin 3 of the first interface 13, and the positive electrode of diode D100 is grounded. In this embodiment, the resistor R66, the first operational amplifier, the resistor R3, the resistor R1 and the resistor R2 constitute a transmitting circuit of the communication circuit of the control host, and the second operational amplifier, the resistor R4, the resistor R51 and the resistor R7 constitute a receiving circuit of the communication circuit of the control host.

[0044] based on Figure 2 and Figure 3 The first communication circuit 12 shown introduces the communication process logic:

[0045] 1. Each communication is initiated by the control host;

[0046] 2. Control the host to start its TX pin output, which is normally high voltage, such as Figure 3 As shown, the output of the corresponding first operational amplifier is high level; the first slave 30 and the second slave 30 connected to all buses also receive a low voltage in normal state;

[0047] 3. The IN network tag of the first communication circuit 12 is at a low voltage when the control host is in normal state. When the control host starts to output serial port data, the start bit is first followed by other bits. At this time, after conversion by the corresponding transistors, the INR network tag obtains the standard serial port signal output by the control host.

[0048] 4. After the intelligent control board recognizes the data coming down from a single communication bus, it performs corresponding data processing:

[0049] A. If the ID number (also referred to as the address code) sent by the control host is the one that controls this embodiment, the corresponding processing is performed; usually, the serial port sends the pin Figure 2 The Send network tag is normally at low voltage. When receiving a command from the control host via a single communication bus and needs to return data to the control host, the Send network tag will first output a high voltage normally, and then output the serial port signal normally after maintaining it for a period of time.

[0050] B. If the control host sends a command to other brushless motors, the built-in timer will be started based on the estimated data transmission time required from the other brushless motors according to the command. During the startup period, the host will no longer recognize and respond to subsequent data transmitted from a single communication bus.

[0051] In another embodiment, Figure 5 As shown, a detailed circuit form is provided for the first communication circuit 12, and its circuit structure design is ingenious and reasonable to ensure the stability and reliability of communication. At the same time, when the slave sends a signal outward, the slave uses its own power supply to control the host's own power consumption.

[0052] like Figure 5 As shown, the transmitting circuit includes a resistor R4, a resistor R5, a transistor Q2, a resistor R2, a transistor Q3 and a diode D2;

[0053] The MCU 13 is connected to the base of the transistor Q2 through the resistor R4, the base of the transistor Q2 is connected to the emitter of the transistor Q2 through the resistor R5, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the base of the transistor Q3, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R2, the emitter of the transistor Q3 is used to connect to the VCC2 voltage terminal, the collector of the transistor Q3 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the first communication control interface 15.

[0054] The receiving circuit includes a resistor R13, a resistor R15, a transistor Q6, a transistor Q8, a resistor R8, a resistor R10 and a resistor R14; the resistor R14 and the resistor R10 are connected in series, the non-series node of the resistor R14 is connected to the MCU 13, the series node of the resistor R14 and the resistor R10 is connected to the collector of the transistor Q8, the non-series node of the resistor R10 is used to connect to the 3.3V voltage terminal, the base of the transistor Q8 and one end of the resistor R8 are both connected to the collector of the transistor Q6, the other end of the resistor R8 is used to connect to the 3.3V voltage terminal, the base of the transistor Q8 is connected to the first communication control interface 15, the base of the transistor Q8 is also grounded through the resistor R15, and the emitters of both the transistor Q8 and the transistor Q6 are grounded.

[0055] It should be noted that the communication circuit of the control host cooperates with the first communication circuit 12, such as Figure 4 As shown, the communication circuit of the control host includes resistor R3, resistor R6, transistor Q4, resistor R1, transistor Q1, diode D1, resistor R9, resistor R11, transistor Q7, transistor Q5, resistor R7, resistor R12 and resistor R16. The specific circuit connection relationship is as follows: Figure 5 As shown, the resistor R3, resistor R6, transistor Q4, resistor R1, transistor Q1 and diode D1 constitute a sending circuit of the communication circuit that controls the host, and the resistor R9, resistor R11, transistor Q7, transistor Q5, resistor R7, resistor R12 and resistor R16 constitute a receiving circuit of the communication circuit that controls the host.

[0056] The design focus of the utility model is that it mainly integrates the MCU, the brushless motor driver chip, the first communication control interface, the first power supply interface and the first communication circuit on the intelligent control board, so that the control between the control host and the brushless motor body only requires a single bus, reducing the complexity of the system control program and the wiring cost;

[0057] Secondly, the intelligent control board is set on the brushless motor body and the acceleration sensor is set on the intelligent control board. On the one hand, it can be used for posture recognition of the brushless motor body. On the other hand, it can realize vibration monitoring of its location when the brushless motor body is not working.

[0058] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A single bus controlled brushless motor, characterized in that: Including brushless motor body and intelligent control board; The intelligent control board is provided with an MCU, a brushless motor driver chip, and a first communication circuit for communicating with the control host. The MCU is connected to the first communication circuit, and the MCU is connected to a first power supply interface; the first communication circuit is connected to a first communication control interface; the first communication control interface is used to connect to a second communication control interface on a single communication bus, and the first power supply interface is used to connect to a second power supply interface on a group of power lines; The MCU is connected to the brushless motor drive chip via a second communication circuit, and the brushless motor drive chip is connected to the brushless motor body.

2. The single bus controlled brushless motor according to claim 1, characterized in that: The first communication circuit includes a sending circuit and a receiving circuit. The receiving circuit is used to convert the signal on the single communication bus into a signal that can be recognized by the MCU of the intelligent control board. The sending circuit is used to convert the signal sent by the MCU of the intelligent control board into a bus signal, which is transmitted via the single communication bus for recognition and processing by the control host.

3. The single bus controlled brushless motor according to claim 2, characterized in that: The transmitting circuit includes a transistor Q2, a resistor R9 and a resistor R12; The base of the transistor Q2 is connected to the MCU via the resistor R9. The base of the transistor Q2 is also connected to the emitter of the transistor Q2 via the resistor R12. The emitter of the transistor Q2 is grounded. The collector of the transistor Q2 is connected to the first communication control interface.

4. The single bus controlled brushless motor according to claim 2, characterized in that: The receiving circuit includes a transistor Q1, a resistor R8, a resistor R5, a resistor R10 and a capacitor C10; The base of the transistor Q1 is connected to the first communication control interface through the resistor R8. The base of the transistor Q1 is also connected to the emitter of the transistor Q2 through the resistor R10. The emitter of the transistor Q1 is grounded. The capacitor C10 and the resistor R10 are connected in parallel. One end of the resistor R5 is used to connect to the 3.3V voltage terminal. The other end of the resistor R5 is connected to the collector of the transistor Q1. The collector of the transistor Q1 is connected to the MCU.

5. The single bus controlled brushless motor according to claim 2, characterized in that: The transmitting circuit includes a resistor R4, a resistor R5, a transistor Q2, a resistor R2, a transistor Q3 and a diode D2; The MCU is connected to the base of the transistor Q2 through the resistor R4, the base of the transistor Q2 is connected to the emitter of the transistor Q2 through the resistor R5, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the base of the transistor Q3, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R2, the emitter of the transistor Q3 is used to connect to the VCC2 voltage terminal, the collector of the transistor Q3 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the first communication control interface.

6. The single bus controlled brushless motor according to claim 2, characterized in that: The receiving circuit includes a resistor R13, a resistor R15, a transistor Q6, a transistor Q8, a resistor R8, a resistor R10 and a resistor R14; Resistor R14 and resistor R10 are connected in series, the non-series node of resistor R14 is connected to the MCU, the series node of resistor R14 and resistor R10 is connected to the collector of transistor Q8, the non-series node of resistor R10 is used to connect to the 3.3V voltage terminal, the base of transistor Q8 and one end of resistor R8 are both connected to the collector of transistor Q6, the other end of resistor R8 is used to connect to the 3.3V voltage terminal, the base of transistor Q8 is connected to the first communication control interface, the base of transistor Q8 is also grounded through resistor R15, and the emitters of both transistor Q8 and transistor Q6 are grounded.

7. The single bus controlled brushless motor according to claim 2, characterized in that: The intelligent control board is arranged on the brushless motor body. An acceleration sensor is also arranged on the intelligent control board. The MCU is connected to the acceleration sensor.

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