Small-size double-path brushless direct current motor driver

Abstract

The utility model relates to the technical field of drivers, and discloses a small-size double-path brushless direct current motor driver, which comprises a driving board, the size of the driving board is 58mm * 24mm, and the upper surface of the driving board is provided with a vehicle gauge level MCU, two FD6288Q pre-driving chips and two small packaging driving power tube groups. The small-size two-way brushless direct current motor driver is small in size and large in power, two independent circuits are formed by the vehicle gauge level MCU, the two FD6288Q pre-drive chips and the two small packaging drive power tube sets, the two brushless direct current motors are driven respectively, the driver collects motor phase currents and angle sensor output values in real time through an ADC interface of the vehicle gauge level MCU, and the motor phase currents and the angle sensor output values of the brushless direct current motors are acquired in real time through the ADC interface of the vehicle gauge level MCU. Hall signals are obtained through the GPIO interface and processed by the MCU, control signals are generated, the power tube set is controlled to be switched on and switched off, three-ring closed-loop control over a motor current ring, a speed ring and a position is achieved, in addition, the driver is further provided with a temperature detection interface and a temperature sensor, and the temperature of a driving board can be monitored in real time.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a driver, in particular to a small-size double-path brushless direct-current motor driver. BACKGROUND

[0002] The brushless direct-current motor driver is an electronic control device for driving a brushless direct-current motor, and the main function thereof is to accurately adjust the rotating speed and position of the motor by controlling the three-phase current of the motor, so that the motor can be efficiently and stably operated. The brushless motor driver does not use traditional mechanical brushes and commutators, but relies on electronic switches to control the switching of the current.

[0003] The existing brushless direct-current motor driver can only drive one brushless direct-current motor, and cannot simultaneously drive two brushless direct-current motors, and the size thereof is large. In order to solve the above problems, the application provides a small-size double-path brushless direct-current motor driver. CONTENT OF THE UTILITY MODEL

[0004] In view of the defects of the prior art, the application provides a small-size double-path brushless direct-current motor driver, which has the characteristics of small size and large power, and can simultaneously drive two brushless direct-current motors.

[0005] In order to achieve the above purpose, the application provides the following technical scheme: a small-size double-path brushless direct-current motor driver, comprising a driving board, the size of the driving board is 58mm*24mm, one vehicle-grade MCU, two FD6288Q pre-driver chips and two groups of small packaging driving power tube groups are installed on the upper surface of the driving board, three ADC interfaces and three GPIO interfaces are formed on the two sides of the vehicle-grade MCU, the two sides of the vehicle-grade MCU are respectively connected with two groups of PWM output ends and two FD6288Q pre-driver chips, the two FD6288Q pre-driver chips are respectively connected with two groups of small packaging driving power tube groups through two groups of wires, a CANFD chip connected with the vehicle-grade MCU is installed on the upper surface of the driving board, two SPI interfaces are formed on the outer surface of the vehicle-grade MCU, two angle sensors are arranged outside the driving board, and the two angle sensors are respectively connected with the two SPI interfaces through wires.

[0006] Through the above scheme, the device has a small size, and also has a large power. By arranging a vehicle gauge MCU, two FD6288Q pre-drive chips and two small packaging drive power tube groups, two circuits can be formed. The ADC interfaces arranged on the two sides of the vehicle gauge MCU are used to collect the phase current of the two brushless DC motors and the output value of the angle sensor. The GPIO interfaces arranged on the two sides of the vehicle gauge MCU are used to obtain the Hall signal, and the Hall signal is processed in the vehicle gauge MCU, and a switching signal is outputted to control the on-off of the two small packaging drive power tube groups. The current loop is used as an inner loop, the speed loop is used as a middle loop, and the position loop is used as an outer loop, so that three closed-loop controls of the motor are realized, and two-way brushless DC motor closed-loop driving circuit is realized. The temperature detection interface and the temperature sensor arranged can support the function of temperature detection on the driving board. The CANFD chip arranged can make the device support CANFD communication function.

[0007] Further, each of the small packaging drive power tube groups comprises six small packaging drive power tubes.

[0008] Through the above scheme, each small packaging drive power tube group can be used for high-side and low-side switching control of three-phase current.

[0009] Further, the bottom surface of each small packaging drive power tube group is provided with a heat dissipation copper foil.

[0010] Through the above scheme, the small packaging drive power tube group can be effectively cooled.

[0011] Further, the two angle sensors are fixedly connected to the housings of the two brushless DC motors, and the sensing elements in the angle sensors are directly connected to the output shafts of the brushless DC motors.

[0012] Through the above scheme, the angle sensor is arranged on the housing of the brushless DC motor, so that the angle of the motor shaft can be accurately obtained, and the high-precision closed-loop control is suitable.

[0013] Further, the top of the vehicle gauge MCU is provided with a CANFD interface, and the CANFD chip is inserted into the CANFD interface through a wire.

[0014] Through the above scheme, the CANFD chip can have stable communication function.

[0015] Further, the top of the vehicle gauge MCU is provided with two temperature detection interfaces, and two temperature sensors are electrically connected to the two temperature detection interfaces through wires, and the two temperature sensors are arranged on the upper surface of the driving board.

[0016] Through the above scheme, the device has a temperature detection function.

[0017] Further, the two sides of the car-grade MCU are provided with reserved interfaces.

[0018] Through the above scheme, other circuits can be externally connected, and the use effect of the device is optimized.

[0019] Further, the upper surface of the driving board is welded with a power module, and the power module is electrically connected with the driving board.

[0020] Through the above scheme, sufficient electric energy can be provided for the device, and normal operation of the device is ensured.

[0021] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0022] The small-size dual-channel brushless DC motor driver has small size and large power, is composed of a car-grade MCU, two small packaging driving power tubes and two FD6288Q pre-driver chips, and drives two brushless DC motors. The driver collects motor phase current and angle sensor output values in real time through the ADC interface of the car-grade MCU, obtains Hall signals through the GPIO interface, processes the signals by the MCU, generates control signals, controls the switching of the power tube group, realizes three-loop closed-loop control of the motor current loop, speed loop and position loop, and further, the driver is provided with a temperature detection interface and a temperature sensor, can monitor the temperature of the driving board in real time, and is integrated with a CANFD chip to realize CANFD communication function. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a first overall top view structural schematic diagram of the structure of the present application;

[0024] Figure 2 It is an overall side view structural schematic diagram of the structure of the present application;

[0025] Figure 3 It is a second overall top view structural schematic diagram of the structure of the present application;

[0026] Figure 4 It is a flowchart of the structure of the present application.

[0027] In the figure:

[0028] 1, driving board; 2, car-grade MCU; 3, ADC interface; 4, GPIO interface; 5, FD6288Q pre-driver chip; 6, small packaging driving power tube group; 7, heat dissipation copper foil; 8, CANFD interface; 9, CANFD chip; 10, SPI interface; 11, angle sensor; 12, temperature detection interface; 13, temperature sensor; 14, reserved interface; 15, power module. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] Please refer to Figure 1 , Figure 2 and Figure 4 A small-size double-path brushless DC motor driver in the embodiment includes a driving board 1, the size of the driving board 1 is 58mm*24mm, since the size of the driving board 1 is small, the device can be embedded in equipment as an independent module, an automotive-grade MCU 2, two FD6288Q pre-driver chips 5 and two groups of small packaging driving power tube groups 6 are installed on the upper surface of the driving board 1, the working temperature range of the automotive-grade MCU 2 is -40℃~85℃, three ADC interfaces 3 and three GPIO interfaces 4 are opened on both sides of the automotive-grade MCU 2, the driving board 1 can be connected with two built-in Hall sensors of brushless DC motors through the opened multiple ADC interfaces 3 and GPIO interfaces 4, the two sides of the automotive-grade MCU 2 are electrically connected with the two FD6288Q pre-driver chips 5 through two groups of PWM output ends, so that the automotive-grade MCU 2 can control the driving signals of the two brushless motors, the FD6288Q pre-driver chip 5 integrates the brushless motor pre-driving function and supports three-phase driving, the two FD6288Q pre-driver chips 5 are electrically connected with the two groups of small packaging driving power tube groups 6 through two groups of wires, each small packaging driving power tube group 6 includes six small packaging driving power tubes, so that the small packaging driving power tube group 6 can be used for high-side and low-side switch control of three-phase current, and the bottom surface of each small packaging driving power tube group 6 is installed with a heat dissipation copper foil 7, which can effectively dissipate heat of the small packaging driving power tube group 6.

[0031] It should be noted that the two sides of the automotive-grade MCU 2 are provided with the FD6288Q pre-driver chip 5 and the small packaging driving power tube group 6, so that the two brushless DC motors can be controlled to work at the same time, and the size of the small packaging driving power tube group 6 is small, so that the small packaging driving power tube group 6 can be reasonably distributed on the small-size driving board 1, the space of the driving board 1 is optimized, and the FD6288Q pre-driver chip 5 is installed close to the small packaging driving power tube group 6, so that the signal path can be shortened to reduce the parasitic effect.

[0032] Please refer to Figure 1 , Figure 2 and Figure 4The upper surface of the driving plate 1 is provided with a CANFD chip 9 electrically connected with the vehicle-grade MCU 2, the top of the vehicle-grade MCU 2 is provided with a CANFD interface 8, the CANFD chip 9 is plugged into the CANFD interface 8 through a wire, and the CANFD chip 9 has stable communication function through the CANFD interface 8, the outer surface of the vehicle-grade MCU 2 is provided with two SPI interfaces 10, the driving plate 1 is provided with two angle sensors 11 outside, the two angle sensors 11 are electrically connected with the two SPI interfaces 10 through wires respectively, the two angle sensors 11 are fixedly connected to the housings of the two brushless DC motors respectively, and the sensing elements in the angle sensors 11 are directly connected with the output shafts of the brushless DC motors, the angle sensors 11 are installed on the housings of the brushless DC motors, the angle of the motor shaft can be accurately obtained, and the device is suitable for high-precision closed-loop control.

[0033] It should be noted that the ADC interface 3 can be opened to collect the phase current of the brushless DC motor and the output value of the angle sensor 11, the GPIO interface 4 can be opened to obtain the Hall signal, and the Hall signal is processed in the vehicle-grade MCU 2, and a switching signal is output to control the on-off of the corresponding small package driving power tube group 6, so that the current loop is used as an inner loop, the speed loop is used as a middle loop, and the position loop is used as an outer loop, and three closed-loop controls of the motor are realized.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 , the top of the vehicle-grade MCU 2 is provided with two temperature detection interfaces 12, the two temperature detection interfaces 12 are respectively electrically connected with temperature sensors 13 through wires, and the two temperature sensors 13 are installed on the upper surface of the driving plate 1. The device has a temperature detection function through the temperature detection interface 12 and the temperature sensor 13, and the temperature of the driving plate 1 is monitored in real time. The two sides of the vehicle-grade MCU 2 are provided with reserved interfaces 14, other circuits can be externally connected through the reserved interfaces 14, and the use effect of the device is optimized. The upper surface of the driving plate 1 is welded with a power module 15, the power module 15 is electrically connected with the driving plate 1, and the electrical elements above the driving plate 1 are electrically connected with the driving plate 1. Therefore, the power module 15 can provide sufficient power for each electrical element in the device, and ensure the normal operation of the device.

[0035] The small-size double-path brushless direct-current motor driver in the embodiment has a small size and also has a large power. Through cooperation of a vehicle-grade MCU 2, two FD6288Q pre-drive chips 5 and two small-package driving power tube groups 6, two groups of circuits can be formed. The ADC interfaces 3 opened on both sides of the vehicle-grade MCU 2 are used to collect the phase current of the two brushless direct-current motors and the output value of the angle sensor 11. The GPIO interfaces 4 opened on both sides of the vehicle-grade MCU 2 are used to obtain the Hall signals, and the Hall signals are processed in the vehicle-grade MCU 2 to output switching signals, which are used to control the on-off of the two small-package driving power tube groups 6. The current loop is used as an inner ring, the speed loop is used as a middle ring, and the position loop is used as an outer ring, so that three closed-loop controls of the motor are realized. The two-path brushless direct-current motor closed-loop driving circuit can drive two 24V / 3A brushless direct-current motors to work. The temperature detection interface 12 and the temperature sensor 13 can support the function of temperature detection on the driving board 1. The CANFD chip 9 can support the CANFD communication function of the device.

[0036] The working principle of the above embodiment is as follows: The phase current of the brushless direct-current motor and the output value of the angle sensor 11 are collected through the ADC interfaces 3 of the vehicle-grade MCU 2. The Hall signals are obtained through the GPIO interfaces 4 of the vehicle-grade MCU 2, and the Hall signals are processed in the vehicle-grade MCU 2 to output switching signals, which are used to control the on-off of the small-package driving power tube groups 6. The current loop is used as an inner ring, the speed loop is used as a middle ring, and the position loop is used as an outer ring, so that three closed-loop controls of the motor are realized. Since the vehicle-grade MCU 2 is provided with relatively symmetrical electrical elements on both sides, one vehicle-grade MCU 2 can be used to simultaneously drive and control two brushless direct-current motors. The CANFD chip 9 can realize efficient communication, and the temperature sensor 13 can detect the temperature on the driving board 1 in real time, which is more practical.

[0037] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0038] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and that changes can be made in detail without departing from the principles and spirit of the application. The scope of the application is therefore defined by the appended claims and their equivalents.

Claims

1. A small size two-channel brushless DC motor driver comprising a drive board (1), characterized in that: The size of the drive plate (1) is 58mm*24mm, the upper surface of the drive plate (1) is provided with a vehicle gauge MCU (2), two FD6288Q pre-drive chips (5) and two groups of small package driving power tube groups (6), the two sides of the vehicle gauge MCU (2) are provided with three ADC interfaces (3) and three GPIO interfaces (4), the two sides of the vehicle gauge MCU (2) are respectively connected with two FD6288Q pre-drive chips (5) through two groups of PWM output ends, two FD6288Q pre-drive chips (5) are respectively connected with two groups of small package driving power tube groups (6) through two groups of wires, the upper surface of the drive plate (1) is provided with a CANFD chip (9) connected with the vehicle gauge MCU (2), the outer surface of the vehicle gauge MCU (2) is provided with two SPI interfaces (10), the drive plate (1) is provided with two angle sensors (11), and the two angle sensors (11) are respectively connected with two SPI interfaces (10) through wires.

2. A small size two-phase brushless DC motor driver according to claim 1, characterized in that: Each group of small package driving power tube groups (6) comprises six small package driving power tubes.

3. The small size dual channel brushless DC motor driver according to claim 1, wherein: The bottom surface of each group of small package driving power tube groups (6) is provided with a heat dissipation copper foil (7).

4. The small size dual channel brushless DC motor driver of claim 1, wherein: Two angle sensors (11) are respectively fixedly connected to the housings of two brushless DC motors, and the sensing elements in the angle sensors (11) are directly connected with the output shafts of the brushless DC motors.

5. The small size dual channel brushless DC motor driver of claim 1, wherein: The top of the vehicle gauge MCU (2) is provided with a CANFD interface (8), and the CANFD chip (9) is inserted into the CANFD interface (8) through a wire.

6. The small size dual channel brushless DC motor driver of claim 1, wherein: The top of the vehicle gauge MCU (2) is provided with two temperature detection interfaces (12), two temperature sensors (13) are respectively connected with the two temperature detection interfaces (12) through wires, and the two temperature sensors (13) are mounted on the upper surface of the drive plate (1).

7. The small size dual channel brushless DC motor driver of claim 1, wherein: The two sides of the vehicle gauge MCU (2) are provided with reserved interfaces (14).

8. The small size dual channel brushless DC motor driver of claim 1, wherein: The upper surface of the drive plate (1) is welded with a power module (15), and the power module (15) is connected with the drive plate (1).

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