Motor driving chip, motor driving method, motor driving device and electronic equipment

Abstract

The present application provides a motor driver chip, a motor driving method, a motor driver device and an electronic device. The motor driver chip includes a control module and a sensor module respectively connected to the motor. When the motor driver chip is in standby mode, the control module is used to receive the position information of the motor obtained by the sensor module, and generate a driving strategy for controlling the motor to reset the position according to the position information of the motor. Since the motor driver chip performs the above-mentioned work flow in standby mode, when switching from standby mode to operating mode, it can immediately output driving excitation information according to the driving strategy to control the motor to reset the position, thereby effectively avoiding abnormal sounds, vibrations and noises generated during the process of resetting the motor position, greatly improving the user's tactile experience, and avoiding negative impacts on motor performance and life; and, saving the initialization time when the motor driver chip is powered on, improving its operating efficiency.

Description

[0001] Technical Field Description Paragraph The present application relates to the field of driver chip technology, and in particular to a motor driver chip, a motor driver method, a motor driver device and an electronic device. Background Art

[0002] The structural types of Optical Image Stabilizer (OIS) are mainly divided into suspended wire structure and ball-bearing structure. The ball-bearing structure replaces the metal suspended wire in the suspended wire structure with a two-layer ball-bearing slide rail structure on the X-axis and Y-axis. The linear motor drives the ball to drive the entire lens module for anti-shake. That is, the ball-bearing structure lacks a limiting mechanism.

[0003] Since the motor of the ball-type anti-shake structure lacks a limit mechanism, the motor driver chip needs to confirm the specific position of the motor before outputting the drive signal during the initialization process of controlling the motor to reset its position, so as to determine the mechanism of motor position reset. Among them, motor position reset refers to the precise position adjustment of the motor to return the motor position to the initial position, that is, back to the center, so as to ensure the stable operation of the motor.

[0004] When the current motor driver chip is powered on, it usually starts to reset the chip when switching from sleep mode or stop mode to standby mode, then switches from standby mode to running mode, obtains the motor position when entering running mode, and controls the motor to reset the position, thereby completing initialization. This mechanism will cause the motor driver chip to start driving the motor when entering running mode without knowing the exact position of the motor. In this way, during the process of resetting the motor position, it is not only easy to produce abnormal sounds, vibrations and noises, causing a bad tactile experience for users, but also has a certain negative impact on the performance and life of the motor. In addition, the process takes a lot of time, resulting in a long reset time for the motor, that is, a long initialization time for the motor driver chip. Summary of the invention

[0005] The present application provides a motor driving chip, a motor driving method, a motor driving device and an electronic device, which are used to improve the problem of long initialization time when the motor driving chip is powered on.

[0006] In a first aspect, the present application provides a motor driving chip for controlling a motor, comprising: a control module and a sensor module, wherein the control module and the sensor module are respectively connected to the motor; When the motor driving chip is in the standby mode, the control module is used to receive the position information of the motor acquired by the sensor module, and generate a driving strategy for controlling the position resetting of the motor according to the position information of the motor.

[0007] In some embodiments, the motor driver chip further includes a register, which is respectively connected to the control module and the sensor module; when the motor driver chip is in standby mode, the register is used to store the position information of the motor and the driving strategy.

[0008] In some embodiments, the motor driver chip also includes a driving module, which is respectively connected to the control module and the motor; when the motor driver chip switches from the standby module to the operating mode, the driving module is used to output driving excitation information in response to the driving strategy to control the motor position reset.

[0009] In some embodiments, before the motor driver chip switches from the standby mode to the running mode, the register is not reset.

[0010] In some embodiments, the motor driving chip switches from the standby mode to the running mode, and after the driving module outputs the driving excitation information according to the driving strategy, the register performs a reset operation.

[0011] In some embodiments, the control module is specifically used to generate different driving strategies according to position information of the motor at different distances.

[0012] In some embodiments, when the motor driving chip is in the standby mode, the driving module stops running, and both the input port and the output port of the driving module are closed.

[0013] In some embodiments, when the motor driving chip switches from the standby mode to the running mode, the driving module is running, and both the input port and the output port of the driving module are opened.

[0014] In a second aspect, the present application provides a motor driving method, which is used for the motor driving chip as described in the first aspect, and the motor driving method includes: When the motor driving chip is in standby mode, the position information of the motor is obtained through the sensor module; A driving strategy is generated by a control module according to the position information of the motor.

[0015] In a third aspect, the present application provides a motor driving device, comprising a motor and a driving chip as described in the first aspect, wherein the motor driving chip is used to control the position resetting of the motor.

[0016] In a fourth aspect, the present application provides an electronic device, comprising a driving device as claimed in the third aspect.

[0017] In the motor drive chip, motor drive method, motor drive device and electronic device provided by the present application, the motor drive chip includes a control module and a sensor module respectively connected to the motor; when the motor drive chip is in standby mode, the control module is used to receive the position information of the motor obtained by the sensor module, and generate a drive strategy for controlling the motor to reset the position according to the position information of the motor. Since the motor drive chip performs the above-mentioned work flow in standby mode, when switching from standby mode to operating mode, it can immediately output drive excitation information according to the drive strategy to control the motor to reset the position, thereby effectively avoiding abnormal sound, vibration and noise in the process of resetting the motor position, greatly improving the user's tactile experience; and, saving the initialization time when the motor drive chip is powered on, improving its operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The power-on flow chart of the motor drive chip in the prior art is shown; Figure 2 A module state diagram showing a motor driver chip in a sleep mode or a stop mode; Figure 3 The module status diagram shows the motor driver chip in standby mode; Figure 4 shows a module state diagram of a motor driver chip in operating mode; Figure 5 A schematic diagram of the structure of a motor driver chip in an embodiment of the present application is shown; Figure 6 Another structural schematic diagram of the motor driver chip in the embodiment of the present application is shown; Figure 7 Another structural schematic diagram of the motor driver chip in the embodiment of the present application is shown; Figure 8 The power-on flow chart of the motor driver chip in the embodiment of the present application is shown; Fig. 9 A schematic flow chart of a motor driving method in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0023] The power consumption modes of the motor driver chip in the embodiment of the present application mainly include sleep mode, standby mode and operation mode. When the motor driver chip is in sleep mode, all modules are not working; when the motor driver chip is in standby mode, except for the driver module, all other modules are working; when the motor driver chip is in operation mode, all modules can work.

[0024] Figure 1 The power-on flow chart of the motor driver chip in the prior art is shown in FIG. Figure 1 At present, in order to save energy, motor driver chips are generally in sleep mode or stop mode when they stop running. Before entering the running mode, they switch from sleep mode or stop mode to standby mode to reset the chip, obtain the motor position when entering the running mode, and control the motor to reset the position, thereby completing the initialization.

[0025] Figure 2 The module status diagram shows that the motor driver chip is in sleep mode or stop mode. Figure 3The module status diagram shows the motor driver chip in standby mode. Figure 4 The module status diagram of the motor driver chip in the running mode is shown as Figure 2 , Figure 3 and Figure 4 As shown, when the current motor driver chip is in sleep mode or stop mode, the control module, sensor module, register and driver module are all in a stopped state; when the sleep mode or stop mode is switched to standby mode, the control module, sensor module and register module are all in a running state, and only the driver module is in a stopped state; when the standby mode is switched to the running mode, the control module, sensor module, register and driver module are all in a running state. It should be noted that Figure 2 , Figure 3 and Figure 4 In the figure, black lines indicate no signal transmission, and red lines indicate signal transmission.

[0026] This mechanism of obtaining the motor position only after entering the running mode and controlling the motor to reset the position will cause the motor driver chip to start driving the motor without knowing the exact position of the motor when entering the running mode. In the process of driving the motor, the position of the motor is gradually tried, and the relevant algorithms are continuously iterated and converged before the motor position is finally reset. In this way, in the process of resetting the motor position, not only is it easy to produce abnormal sounds, vibrations and noise, causing a bad tactile experience for users, but it also has a certain negative impact on the performance and life of the motor, and the process takes a lot of time, resulting in a long reset time for the motor, that is, a long initialization time for the motor driver chip.

[0027] In view of this, embodiments of the present application provide a motor driving chip, a driving method, a motor driving device and an electronic device, which are described in detail below.

[0028] Figure 5 A schematic diagram of the structure of the motor driver chip in the embodiment of the present application is shown. Figure 5 An embodiment of the present application provides a motor driver chip for controlling a motor M, including: a control module and a sensor module, the control module and the sensor module are respectively connected to the motor M; when the motor driver chip is in standby mode, the control module is used to receive position information of the motor M acquired by the sensor module, and generate a position reset driving strategy for controlling the motor according to the position information of the motor.

[0029] Exemplarily, the motor M in the embodiment of the present application mainly refers to a motor lacking a limit structure, such as a micro telescopic motor, a micro eccentric motor, a stepless speed motor, a ball motor, etc. These motors require external control for precise positioning and movement. The position information of the motor includes the axis position of the stator and the axis position of the rotor of the motor, as well as the movement position of the motor. The sensing module generally uses a Hall sensor.

[0030] Specifically, when the motor driver chip of the embodiment of the present application is in standby mode, the position information of the motor is obtained through the sensor, and then the control module generates a driving strategy for resetting the position of the motor according to the position information of the motor. The driving strategy includes the angle of rotation of the motor rotor and the distance the motor moves in order to align the axis of the stator of the motor with the axis of the rotor.

[0031] Based on the above embodiment, the control module is specifically used to generate different driving strategies according to the position information of the motor at different distances.

[0032] Specifically, if the motor is located far away, the driving strategy adopts a step-by-step driving method with segmented driving to avoid abnormal sounds, vibrations and noise caused by overshooting due to a single drive, and to avoid negative impacts on the motor performance and life; if the motor is located close, the driving strategy adopts a single drive method.

[0033] Alternatively, the driving strategies all adopt a stepping method of segmented driving, but if the motor is located far away, a relatively large stepping method is adopted; if the motor is located close, a relatively small stepping method is adopted.

[0034] Alternatively, the driving strategy adopts a stepping method of segmented driving, but if the motor is far away, a relatively large stepping method is adopted first, and then a relatively small stepping method is adopted; if the motor is close, a relatively small stepping method is continuously adopted.

[0035] It is understandable that a distance threshold may be preset, and if the distance of the motor exceeds the preset distance threshold, the motor is considered to be far away; if the distance of the motor does not exceed the preset distance threshold, the motor is considered to be close. The preset distance threshold may be reasonably set according to different driving strategies adopted.

[0036] It is also understandable that other driving strategies may be adopted, not limited to the above examples; or multiple driving strategies may be combined, which is not limited in the embodiments of the present application.

[0037] Figure 6 Another schematic diagram of the structure of the motor driver chip in the embodiment of the present application is shown. Figure 6Based on the above embodiment, the motor driver chip also includes registers, which are respectively connected to the control module and the sensor module; when the motor driver chip is in standby mode, the registers are used to store the position information of the motor and the driving strategy for resetting the motor position.

[0038] Specifically, in the embodiment of the present application, when the motor driving chip is in the standby mode, the memory is used to store the position information of the motor, and the control module generates a driving strategy for resetting the position of the motor according to the position information of the motor.

[0039] Figure 7 Another schematic diagram of the structure of the motor driver chip in the embodiment of the present application is shown. Figure 7 Based on the above embodiment, the motor driver chip also includes a driving module, which is connected to the control module and the motor respectively; when the motor driver chip switches from the standby module to the operating mode, the driving module is used to output driving excitation information in response to the driving strategy to control the motor to reset the position.

[0040] Specifically, when the motor driver chip switches from standby mode to operating mode, the drive module outputs drive excitation information in response to the drive strategy for resetting the motor position; the drive excitation information includes the direction and magnitude of the output voltage and / or output current to enable the motor to reset its position.

[0041] It should be noted that before the motor driver chip of the embodiment of the present application switches from standby mode to running mode, the register is not reset, and the memory stores the position information and driving strategy of the motor. Moreover, after the motor driver chip switches from standby mode to running mode and the driving module outputs driving excitation information according to the driving strategy, the register is reset, and the memory deletes the position information and driving strategy of the motor to complete power-on initialization.

[0042] Specifically, when the motor driver chip is in standby mode, the register can store the position information of the motor and the driving strategy for subsequently resetting the motor position. At this time, the register does not perform a reset operation; when the motor driver chip is in running mode and the drive module outputs the driving excitation information according to the driving strategy, the register performs a reset operation again, thereby completing the initialization of the motor driver chip.

[0043] In order to reduce the power consumption as much as possible, the motor driver chip of the embodiment of the present application has a core clock turned on and a core maintained at a low voltage supply, such as 1.8V, when the motor driver chip is in standby mode.

[0044] It is understandable that when the motor driver chip is in standby mode, the driver module stops running, and the input port and output port of the driver module are closed, and when the motor driver chip switches from standby mode to running mode, the driver module runs, and the input port and output port of the driver module are opened. That is to say, in order to minimize the required additional power consumption, the motor driver chip of the embodiment of the present application keeps the driver module closed and its port closed when in standby mode; when switching from standby mode to running mode, the driver module starts running and its port is opened.

[0045] Figure 8 The power-on flow chart of the motor driver chip in the embodiment of the present application is shown. Figure 1 and Figure 8 As shown, the motor driver chip of the embodiment of the present application obtains the motor position in advance in the standby mode, and determines the driving strategy required to reset the motor position according to the motor position; when switching from the standby mode to the operating mode, it can quickly determine the driving excitation information according to the driving strategy to output the corresponding driving voltage and / or driving current to the motor, thereby controlling the motor to reset the position.

[0046] That is, the motor driver chip of the embodiment of the present application performs the above-mentioned work process in the standby mode. Therefore, the motor driver chip of the embodiment of the present application has already obtained the position of the motor before entering the running mode. Therefore, it can select the most suitable one from a variety of driving strategies (such as PID control method) according to the position of the motor before entering the running mode, so as to stably control the motor to reset the position when entering the running mode. This is different from the existing motor driver chip, which starts to drive the motor when the motor position is unknown when entering the running mode, and thus cannot select a suitable driving strategy when starting to drive. Generally, either a fixed driving strategy is adopted, or the position of the motor is obtained during the process of driving the motor, and then a corresponding driving strategy is selected from a plurality of prepared driving strategies according to the position of the motor, which makes the motor prone to abnormal sound, vibration and noise during the resetting process. That is to say, the motor driver chip of the embodiment of the present application can effectively avoid abnormal sound, vibration and noise during the process of resetting the motor position, greatly improves the user's tactile experience, and reduces the negative impact on the performance and life of the motor.

[0047] Furthermore, when switching from standby mode to running mode, the drive excitation information can be output immediately according to the drive strategy to control the motor to reset the position, instead of obtaining the motor's position information and formulating the drive strategy and outputting the drive excitation information according to the drive strategy when entering the running mode like the existing motor driver chip. This is equivalent to the motor driver chip of the embodiment of the present application shortening the duration of the running mode of the existing motor driver chip, thereby effectively saving the initialization time when the motor driver chip is powered on, which can save approximately 200~300us and improve its operating efficiency.

[0048] Fig. 9 A schematic diagram of the motor driving method in the embodiment of the present application is shown. Fig. 9 Based on the above embodiment, the present application also provides a motor driving method for the motor driving chip as described above. The motor driving method includes: Step S1, when the motor driving chip is in standby mode, obtaining the position information of the motor through the sensor module; Step S2: Generate a driving strategy according to the position information of the motor through the control module.

[0049] Based on the above embodiment, the motor driving method further includes: Step S3: When the motor driving chip switches from the standby mode to the running mode, the driving module outputs driving excitation information according to the driving strategy to control the motor to reset the position.

[0050] Based on the above embodiment, between step S1 and step S2, the step further includes: storing the position information of the motor in a register.

[0051] Based on the above embodiment, between step S2 and step S3, the step further includes: storing the driving strategy in a register.

[0052] Specifically, Fig. 9 As shown, in the motor driving method provided in the embodiment of the present application, when the motor driving chip is in standby mode, the position information of the motor is obtained through the sensor module and stored in the register, and then the control module determines the driving strategy required for resetting the motor position according to the motor position information, and the driving strategy is also stored in the register; when the motor driving chip is switched from standby mode to operating mode, the driving module outputs driving excitation information according to the driving strategy, that is, outputs the corresponding driving voltage and / or driving current to control the motor to reset the position.

[0053] Furthermore, in order to better implement the motor driver chip in the embodiment of the present application, on the basis of the motor driver chip, the embodiment of the present application also provides a motor driver device, the motor driver device comprising: a motor and the motor driver chip described in the above embodiments, wherein the motor driver chip is used to control the motor to reset the position. Since the motor driver device in the embodiment of the present application is provided with the motor driver chip of the above embodiment, it has all the beneficial effects of the above embodiment, which will not be described in detail here.

[0054] Furthermore, in order to better implement the motor driver chip in the embodiment of the present application, on the basis of the motor driver chip, the embodiment of the present application also provides an electronic device, and the electronic device includes the motor drive device as described in the above embodiment. Exemplarily, the electronic device may include but is not limited to displays, cars, smart wearable devices, mobile terminals, smart home devices, etc. Smart wearable devices include but are not limited to smart watches, smart bracelets, and cervical massagers. Mobile terminals include but are not limited to smart phones, laptops, tablets, and POS (point of sales terminal). Smart home devices include but are not limited to smart sockets, smart rice cookers, smart sweepers, smart lights, etc.

[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0056] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0057] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0058] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0059] Each patent, patent application, patent application publication, and other materials, such as articles, books, instructions, publications, documents, etc., cited in this application are hereby incorporated by reference in their entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content described in this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

[0060] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0061] The above is a detailed introduction to a motor driving chip, a motor driving method, a motor driving device and an electronic device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A motor driver chip for controlling a motor, characterized in that: include: A control module and a sensor module, wherein the control module and the sensor module are respectively connected to the motor; When the motor driving chip is in the standby mode, the control module is used to receive the position information of the motor acquired by the sensor module, and generate a driving strategy for controlling the position resetting of the motor according to the position information of the motor.

2. The motor driver chip according to claim 1, characterized in that: It also includes registers, which are respectively connected to the control module and the sensor module; When the motor driving chip is in the standby mode, the register is used to store the position information of the motor and the driving strategy.

3. The motor driver chip according to claim 2, characterized in that: It also includes a driving module, which is connected to the control module and the motor respectively; When the motor driving chip is switched from the standby mode to the running mode, the driving module is used to output driving excitation information in response to the driving strategy to control the motor position to be reset.

4. The motor driver chip according to claim 2, characterized in that: Before the motor driving chip switches from the standby mode to the running mode, the register is not reset.

5. The motor driver chip according to claim 3, characterized in that: The motor driving chip is switched from the standby mode to the running mode, and after the driving module outputs the driving excitation information according to the driving strategy, the register is reset.

6. The motor driver chip according to claim 1, characterized in that: The control module is specifically used to generate different driving strategies according to the position information of the motor at different distances.

7. The motor driver chip according to claim 3, characterized in that: When the motor driving chip is in the standby mode, the driving module stops running, and the input port and the output port of the driving module are both closed.

8. A motor driving method, characterized in that: For the motor driver chip according to any one of claims 1 to 7, the driving method comprises: When the motor driving chip is in standby mode, the position information of the motor is obtained through the sensor module; A driving strategy is generated by a control module according to the position information of the motor.

9. A motor drive device, characterized in that: It comprises a motor and a motor driving chip as described in any one of claims 1 to 7, wherein the motor driving chip is used to control the position resetting of the motor.

10. An electronic device, characterized in that: Includes the motor drive device as described in claim 9.

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