CN216086512U - Brushless motor control circuit - Google Patents
Brushless motor control circuit Download PDFInfo
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- CN216086512U CN216086512U CN202122606129.5U CN202122606129U CN216086512U CN 216086512 U CN216086512 U CN 216086512U CN 202122606129 U CN202122606129 U CN 202122606129U CN 216086512 U CN216086512 U CN 216086512U
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Abstract
The utility model relates to a brushless motor control circuit. The brushless motor control circuit comprises a brushless motor, wherein a sensor is arranged on the brushless motor; the three-phase bridge driving circuit is used for driving the brushless motor and can acquire a current signal of the brushless motor; the pre-drive chip is used for controlling the three-phase bridge drive circuit to drive the brushless motor; the motor position signal processing circuit receives and processes signals acquired by the sensor; the switching circuit supplies power to the three-phase bridge driving circuit; the power chip is electrically connected with the switching circuit and controls the switching circuit to supply power to the three-phase bridge driving circuit; and the microcontroller is electrically connected with the pre-drive chip, the motor position signal processing circuit and the power supply chip. The utility model provides a brushless motor control circuit which can improve the diagnosis and protection mechanism of an electronic power-assisted brake system and improve the safety level.
Description
Technical Field
The utility model relates to the technical field of control systems of automobiles, in particular to a brushless motor control circuit.
Background
In recent years, with the continuous development of automobile electronics, more and more electronic technologies are applied to the control system of the automobile, and the electronic power-assisted brake system is produced.
The development of domestic electronic power-assisted brake systems is promoted through independent research and development of electronic power-assisted brake system projects. At present, related products belong to first-generation products, the coverage of diagnosis and protection mechanisms is not comprehensive, and the functional safety level is not high. With the trend of increasingly strict requirements on the functional safety of the electronic power-assisted brake system, the first generation products cannot meet the requirements.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a brushless motor control circuit which can improve the diagnosis and protection mechanism of an electronic power-assisted brake system and improve the safety level.
Specifically, the present invention provides a brushless motor control circuit, comprising:
a brushless motor having a sensor provided thereon;
the three-phase bridge driving circuit is used for driving the brushless motor and can acquire a current signal of the brushless motor;
the pre-drive chip is used for controlling the three-phase bridge drive circuit to drive the brushless motor;
the motor position signal processing circuit receives and processes the signals acquired by the sensor;
a switching circuit to supply power to the three-phase bridge drive circuit;
the power supply chip is electrically connected with the switching circuit and controls the switching circuit to supply power to the three-phase bridge driving circuit;
and the microcontroller is electrically connected with the pre-drive chip, the motor position signal processing circuit and the power supply chip, and controls the three-phase bridge drive circuit through the pre-drive chip according to the processing result of the motor position signal processing circuit so as to realize the operation control of the brushless motor.
According to an embodiment of the present invention, the pre-driver chip collects a fault signal of the three-phase bridge driving circuit, and the microcontroller receives the fault signal of the three-phase bridge driving circuit and receives a current signal of the brushless motor collected by the three-phase bridge driving circuit through the pre-driver chip.
According to an embodiment of the present invention, the microcontroller determines whether the three-phase bridge driving circuit has a fault according to a fault signal of the three-phase bridge driving circuit, and if the three-phase bridge driving circuit has a fault, the microcontroller controls the switching circuit through the power chip to stop supplying power to the three-phase bridge driving circuit.
According to one embodiment of the utility model, the input end of the power supply chip is connected with a power supply voltage VBAT, and the power supply chip supplies power to the microcontroller after conversion.
According to an embodiment of the utility model, the power chip detects whether the microcontroller has a fault, and if the microcontroller has the fault, the power chip controls the switch circuit to stop supplying power to the three-phase bridge driving circuit.
According to one embodiment of the utility model, the input terminal of the switching circuit is connected to the supply voltage VBAT.
According to one embodiment of the utility model, the microcontroller, the power supply chip and the pre-drive chip are ASILD grade chips.
According to the brushless motor control circuit provided by the utility model, the control of the brushless motor is added, the diagnosis and protection mechanism of the electronic power-assisted brake system can be improved, and the safety level is improved.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the utility model as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principle of the utility model. In the drawings:
fig. 1 shows a schematic structural diagram of a brushless motor control circuit according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
brushless motor control circuit 100
Three-phase bridge drive circuit 102
Pre-driver chip 103
Motor position signal processing circuit 104
Switching circuit 105
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Fig. 1 shows a schematic structural diagram of a brushless motor control circuit according to an embodiment of the present invention. As shown, a brushless motor control circuit 100 includes a brushless motor 101, a three-phase bridge drive circuit 102, a pre-drive chip 103, a motor position signal processing circuit 104, a switching circuit 105, a power supply chip 106, and a microcontroller 107.
A sensor is provided on brushless motor 101. The sensor is used to acquire a position signal of brushless motor 101.
The three-phase bridge drive circuit 102 is used to drive the brushless motor 101. The three-phase bridge driving circuit 102 can collect a current signal of the brushless motor 101.
The pre-drive chip 103 is electrically connected with the three-phase bridge drive circuit. The pre-drive chip 103 is used to control the three-phase bridge drive circuit 102 to drive the brushless motor 101.
The motor position signal processing circuit 104 is used for receiving and processing the position signals acquired by the sensors.
The power supply chip 106 is electrically connected to the switch circuit 105. The power chip 106 can control the switching circuit 105 to supply power to the three-phase bridge driving circuit 102.
The microcontroller 107 is electrically connected with the pre-drive chip 103, the motor position signal processing circuit 104 and the power supply chip 106 respectively. The microcontroller 107 controls the three-phase bridge driving circuit 102 through the pre-driving chip 103 according to the processing result of the motor position signal processing circuit 104, so as to realize the operation control of the brushless motor 101.
Preferably, the pre-driver chip 103 collects a fault signal of the three-phase bridge driving circuit 102. The microcontroller 107 receives the fault signal of the three-phase bridge driving circuit 102, and receives the current signal of the brushless motor 101 collected by the three-phase bridge driving circuit 102 through the pre-driving chip 103. Preferably, the microcontroller 107 determines whether the three-phase bridge driving circuit 102 has a fault according to a fault signal of the three-phase bridge driving circuit 102, and if the three-phase bridge driving circuit 102 has a fault, the microcontroller 107 controls the switching circuit 105 through the power chip 106 to stop supplying power to the three-phase bridge driving circuit 102, so as to improve safety performance.
Preferably, the input terminal of the power chip 106 is connected to the power voltage VBAT. The power supply voltage VBAT is converted by the power supply chip 106 and supplies power to the microcontroller 107. Preferably, the power chip 106 detects whether the microcontroller 107 has a fault. If the power chip 106 detects that the microcontroller 107 has a fault, the power chip 106 controls the switching circuit 105 to stop supplying power to the three-phase bridge driving circuit 102, so as to further improve the safety performance.
Preferably, the input terminal of the switch circuit 105 is connected to the power voltage VBAT.
Preferably, the microcontroller 107, the power supply chip 106 and the pre-drive chip 103 are ASILD grade chips.
The main operating modes of the brushless motor control circuit 100 provided by the utility model are as follows:
the microcontroller 107 is a core module of the entire brushless motor control circuit 100. The microcontroller 107 receives the position signal of the brushless motor 101 processed by the motor position signal processing circuit 104. The pre-driver chip 103 receives control and configuration information of the microcontroller 107, and the microcontroller 107 indirectly controls the three-phase bridge driving circuit 102 through the pre-driver chip 103, so as to realize operation control of the brushless motor 101.
The pre-drive chip 103 acquires a current signal of the brushless motor 101 through the three-phase bridge drive circuit 102, and the pre-drive chip 103 monitors a fault condition of the three-phase bridge drive circuit 102. The pre-driver chip 103 feeds back the current signal and fault condition to the microcontroller 107.
The power supply chip 106 may monitor the operation of the microcontroller 107 and in the event of a failure of the microcontroller 107, the power supply chip 106 controls the switching circuit 105 to cut off power to the three-phase bridge drive circuit 102. The unexpected operation of the brushless motor 101 is prevented, and the safety performance is improved.
The microcontroller 107 and the power supply chip 106 perform redundant control on the switching circuit 105 to control the three-phase bridge driving circuit 102 to drive the brushless motor 101 to operate.
The brushless motor control circuit provided by the utility model can strengthen the control on the brushless motor, comprehensively improve the diagnosis and protection mechanism of the whole circuit and ensure that the functional safety level of the whole circuit is higher.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (7)
1. A brushless motor control circuit, comprising:
a brushless motor having a sensor provided thereon;
the three-phase bridge driving circuit is used for driving the brushless motor and can acquire a current signal of the brushless motor;
the pre-drive chip is used for controlling the three-phase bridge drive circuit to drive the brushless motor;
the motor position signal processing circuit receives and processes the signals acquired by the sensor;
a switching circuit to supply power to the three-phase bridge drive circuit;
the power supply chip is electrically connected with the switching circuit and controls the switching circuit to supply power to the three-phase bridge driving circuit;
and the microcontroller is electrically connected with the pre-drive chip, the motor position signal processing circuit and the power supply chip, and controls the three-phase bridge drive circuit through the pre-drive chip according to the processing result of the motor position signal processing circuit so as to realize the operation control of the brushless motor.
2. The brushless motor control circuit of claim 1, wherein the pre-driver chip collects a fault signal of the three-phase bridge driving circuit, and the microcontroller receives the fault signal of the three-phase bridge driving circuit and receives the current signal of the brushless motor collected by the three-phase bridge driving circuit through the pre-driver chip.
3. The brushless motor control circuit of claim 2, wherein the microcontroller determines whether the three-phase bridge driving circuit has a fault according to a fault signal of the three-phase bridge driving circuit, and if the three-phase bridge driving circuit has a fault, the microcontroller controls the switching circuit through the power supply chip to stop supplying power to the three-phase bridge driving circuit.
4. The brushless motor control circuit of claim 1, wherein an input terminal of the power supply chip is connected to a power supply voltage VBAT, and the power supply chip converts the input voltage VBAT to supply power to the microcontroller.
5. The brushless motor control circuit of claim 4 wherein the power chip detects if the microcontroller is malfunctioning, and if the microcontroller is malfunctioning, the power chip controls the switching circuit to stop supplying power to the three-phase bridge drive circuit.
6. The brushless motor control circuit of claim 1, wherein an input of the switching circuit is coupled to a supply voltage VBAT.
7. The brushless motor control circuit of claim 1 wherein the microcontroller, power chip, and pre-drive chip are ASILD grade chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122606129.5U CN216086512U (en) | 2021-10-27 | 2021-10-27 | Brushless motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122606129.5U CN216086512U (en) | 2021-10-27 | 2021-10-27 | Brushless motor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216086512U true CN216086512U (en) | 2022-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122606129.5U Active CN216086512U (en) | 2021-10-27 | 2021-10-27 | Brushless motor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216086512U (en) |
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2021
- 2021-10-27 CN CN202122606129.5U patent/CN216086512U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240223 Address after: 201206 building 4, Lane 33, Jinji Road, Pudong New Area, Shanghai Patentee after: DIAS AUTOMOTIVE ELECTRONIC SYSTEM Co.,Ltd. Country or region after: China Address before: 200122 No. 1493 South Pudong Road, Shanghai, Pudong New Area Patentee before: SHANGHAI HUIZHONG AUTOMOTIVE MANUFACTURING Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |