Automobile actuator system applying three-phase claw-pole stepping motor

Abstract

The utility model relates to the technical field of motor control and automobile control systems, and discloses an automobile actuator system applying a three-phase claw-pole stepping motor. The automobile actuator system applying the three-phase claw-pole stepping motor comprises the three-phase claw-pole stepping motor, a controller and a driving unit, the controller is connected with the three-phase claw-pole stepping motor and the driving unit, the driving unit is connected with the three-phase claw-pole stepping motor, and the three-phase claw-pole stepping motor is connected with a load; the controller is used for detecting three-phase electrical parameters of the three-phase claw-pole stepping motor and outputting corresponding driving signals to the driving unit based on the frequency and amplitude of the three-phase electrical parameters. The driving unit is used for driving the three-phase claw-pole stepping motor to drive the load according to the operation parameters corresponding to the driving signal when receiving the driving signal, the three-phase claw-pole stepping motor can provide enough torque, it is guaranteed that the motor is not out of step in the operation process, and higher positioning precision, lower vibration and lower noise are obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control and automobile control system, in particular to an automobile actuator system using a three-phase claw-pole stepping motor. Background Art

[0002] At present, the control of automotive actuators (such as air intake grilles, air conditioning outlets, headlight adjusters, etc.) on the market is mainly controlled by small motors in combination with reduction gearboxes. The small motors used in existing automotive actuators are currently two-phase claw-pole stepper motors. Actuators in automobiles have certain requirements for the output torque and speed after being decelerated by the reduction gearbox.

[0003] In order to meet the performance requirements of various actuators on the car while meeting the requirements of cost, installation space, and controller output power limit, a two-phase claw-pole stepper motor with a large reduction ratio gearbox is often used. However, there is a fatal problem with the two-phase claw-pole stepper motor, that is, the higher the motor speed, the worse the motor's load characteristics. When the motor moves at a higher speed, the motor's load capacity drops rapidly, and problems such as loss of step often occur.

[0004] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide an automobile actuator system using a three-phase claw-pole stepper motor, aiming to solve the technical problem of the poor high-speed load capacity of the actuator driven by a two-phase claw-pole stepper motor in the prior art.

[0006] To achieve the above object, the utility model provides an automobile actuator system using a three-phase claw-pole stepper motor, the automobile actuator system using a three-phase claw-pole stepper motor comprising: a three-phase claw-pole stepper motor, a controller and a drive unit:

[0007] The controller is connected to the three-phase claw-pole stepper motor and the drive unit respectively, the drive unit is connected to the three-phase claw-pole stepper motor, and the three-phase claw-pole stepper motor is connected to a load;

[0008] The controller is used to detect the three-phase electrical parameters of the three-phase claw-pole stepper motor, and output corresponding drive signals to the drive unit based on the frequency and amplitude of the three-phase electrical parameters;

[0009] The driving unit is used to drive the three-phase claw-pole stepper motor to drive the load according to the operating parameters corresponding to the driving signal when receiving the driving signal.

[0010] Optionally, the controller includes: a current sampling unit and a control chip;

[0011] The current sampling unit is connected to the three-phase claw-pole stepper motor and the control chip respectively, and the control chip is also connected to the drive unit;

[0012] The current sampling unit is used to collect the three-phase electrical parameters of the three-phase claw-pole stepper motor and output the three-phase current signal to the control chip;

[0013] The control chip is used to output a corresponding driving signal to the driving unit based on the frequency and amplitude of the three-phase electrical parameters.

[0014] Optionally, the automobile actuator system using the three-phase claw-pole stepper motor further includes: a power supply unit;

[0015] The power supply unit is connected to the controller and the three-phase claw-pole stepper motor respectively;

[0016] The power supply unit is used to provide the required operating voltage for the controller and the three-phase claw-pole stepper motor.

[0017] Optionally, the drive unit comprises: a three-phase drive bridge;

[0018] The input end of the three-phase drive bridge is connected to the controller and the three-phase claw-pole stepper motor;

[0019] The three-phase drive bridge is used to receive the drive signal output by the controller and chop the working voltage of the three-phase claw-pole stepper motor based on the drive signal;

[0020] The three-phase drive bridge is also used to drive the three-phase claw-pole stepper motor to drive the load according to the operating parameters corresponding to the drive signal using the chopped working voltage.

[0021] Optionally, the controller is further used to simultaneously input the drive signal to the three bridge arms of the three-phase drive bridge to control the three bridge arms of the three-phase drive bridge to operate simultaneously.

[0022] Optionally, the three-phase drive bridge includes: first to sixth MOS tubes;

[0023] Among them, the gates of the first to sixth MOS tubes are all connected to the controller; the drains of the first MOS tube, the drains of the third MOS tube and the fifth MOS tube are connected to the power supply unit; the source of the first MOS tube is respectively connected to the drain of the second MOS tube and the first end of the first phase inductor, the source of the third MOS tube is respectively connected to the drain of the fourth MOS tube and the first end of the second phase inductor, and the source of the third MOS tube is respectively connected to the drain of the sixth MOS tube and the first end of the third phase inductor; the source of the second MOS tube, the source of the fourth MOS tube and the source of the sixth MOS tube are all grounded.

[0024] Optionally, the three-phase claw-pole stepper motor comprises: a motor housing, a motor shaft, a rotor, three bobbins and two stators at both ends of each bobbin:

[0025] The rotor is located in the cavity of the motor housing and connected to the motor shaft, and is a cylindrical permanent magnet; each of the stators is evenly arranged on both sides of each phase wire frame to form a single phase.

[0026] Optionally, the stator comprises: a first side stator and a second side stator having the same number of stator teeth;

[0027] Wherein, the first side stator is arranged on one side of the wire rack;

[0028] The second side stator is arranged on the other side of the bobbin.

[0029] Optionally, the stator of each phase comprises: a bobbin for accommodating windings, a first side stator located on one side of the bobbin, and a second side stator located on the other side of the bobbin;

[0030] The first side stator, the bobbin and the second side stator are stacked from top to bottom to form a one-phase stator structure.

[0031] Optionally, the three-phase stator includes: a U-phase stator, a V-phase stator and a W-phase stator;

[0032] The U-phase stator, the V-phase stator and the W-phase stator are stacked from top to bottom.

[0033] The utility model replaces the existing two-phase claw-pole stepper motor with a three-phase claw-pole stepper motor in the application of the execution controller of the automobile, which can improve the high-speed load-bearing capacity of the actuator and reduce the running jitter. The three-phase claw-pole stepper motor replaces the original two-phase claw-pole stepper motor and is applied to the hardware circuit used in the automobile actuator system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural schematic diagram of an automobile actuator system using a three-phase claw-pole stepper motor proposed by the utility model;

[0035] Figure 2 It is a structural block diagram of a controller of a first embodiment of an automobile actuator system using a three-phase claw-pole stepping motor according to the utility model;

[0036] Figure 3 A circuit diagram of a three-phase drive bridge of a first embodiment of an automobile actuator system using a three-phase claw-pole stepping motor according to the utility model;

[0037] Figure 4 This is a structural block diagram of a three-phase claw-pole stepper motor of a second embodiment of an automobile actuator system using a three-phase claw-pole stepper motor according to the utility model.

[0038] Description of Figure Numbers:

[0039]

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0042] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0043] It should be noted that the descriptions of "first", "second", etc. in the embodiments of the utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly including at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required in this aspect.

[0044] like Figure 1 As shown, Figure 1 The present invention is a schematic structural diagram of an automobile actuator system using a three-phase claw-pole stepper motor according to an embodiment of the present invention.

[0045] As shown in the figure, an automobile actuator system using a three-phase claw-pole stepper motor provided in this embodiment includes: a three-phase claw-pole stepper motor 1, a controller 2 and a drive unit 3; the controller is connected to the three-phase claw-pole stepper motor and the drive unit respectively, the drive unit is connected to the three-phase claw-pole stepper motor, and the three-phase claw-pole stepper motor is connected to a load.

[0046] It should be noted that the automobile actuator system mainly includes the automobile's air intake grille regulator, air-conditioning outlet regulator, headlight regulator, automobile water valve regulator and other actuator components.

[0047] It is understandable that the controller 2 uses an open-loop forced drag control method to control the operation of the three-phase claw-pole stepper motor 1, and changes the frequency and amplitude of the current according to different requirements to meet the requirements of the application scenario.

[0048] In a specific implementation, the controller 2 in the automobile actuator system can detect the three-phase electrical parameters of the three-phase claw-pole stepper motor 1, and output a corresponding drive signal to the drive unit based on the frequency and amplitude of the three-phase electrical parameters; the drive unit 3 in the automobile actuator system can, when receiving the drive signal, drive the three-phase claw-pole stepper motor 1 to drive the load according to the operating parameters corresponding to the drive signal.

[0049] The utility model replaces the existing two-phase claw-pole stepper motor with a three-phase claw-pole stepper motor in the application of the execution controller of the automobile, which can improve the high-speed load-bearing capacity of the actuator and reduce the running jitter. The three-phase claw-pole stepper motor replaces the original two-phase claw-pole stepper motor and is applied to the hardware circuit used in the automobile actuator system.

[0050] Based on the above-mentioned automobile actuator system using a three-phase claw-pole stepper motor, a first embodiment of the utility model is proposed.

[0051] Reference Figure 2 , Figure 2 This is a structural block diagram of a controller of a first embodiment of an automobile actuator system using a three-phase claw-pole stepper motor according to the utility model.

[0052] In this embodiment, the controller includes: a current sampling unit 10 and a control chip 20 ; wherein the current sampling unit 10 is connected to the three-phase claw-pole stepper motor 1 and the control chip 20 respectively, and the control chip 20 is also connected to the drive unit 3 .

[0053] The automobile actuator system using the three-phase claw-pole stepper motor further includes a power supply unit 30 .

[0054] The power supply unit 30 is connected to the controller 2 and the three-phase claw-pole stepper motor 1 respectively.

[0055] The current sampling unit 10 is used to collect three-phase electrical parameters of the three-phase claw-pole stepper motor and output the three-phase current signal to the control chip.

[0056] The control chip 20 is used to output a corresponding driving signal to the driving unit based on the frequency and amplitude of the three-phase electrical parameters.

[0057] The power supply unit 30 is used to provide the required operating voltage for the controller 2 and the three-phase claw-pole stepper motor 1 .

[0058] The driving unit 3 includes: a three-phase driving bridge 40; the input end of the three-phase driving bridge 40 is connected to the controller 2 and the three-phase claw-pole stepping motor 1;

[0059] It should be noted that the power supply unit receives the external input voltage, processes the input voltage and then powers the core controller and the three-phase half-bridge. The control chip processes the current and voltage signals fed back from the motor end, processes the collected signals, calculates and analyzes them, and outputs the level signal for controlling the three-phase full-controlled bridge. The sampling unit collects the three-phase phase current of the three-phase claw-pole stepper motor to achieve closed-loop control of the current.

[0060] The three-phase drive bridge is used to receive the drive signal output by the controller and chop the working voltage of the three-phase claw-pole stepper motor based on the drive signal; the three-phase drive bridge is also used to drive the three-phase claw-pole stepper motor with the chopped working voltage to drive the load according to the operating parameters corresponding to the drive signal, wherein the controller is also used to simultaneously input the drive signal to the three bridge arms of the three-phase drive bridge to control the three bridge arms of the three-phase drive bridge to operate simultaneously.

[0061] It should be noted that the three-phase half-bridge chops the three-phase voltage at the motor end to achieve the desired current waveform, thereby driving the three-phase claw machine stepper motor to operate.

[0062] The three-phase drive bridge comprises: first to sixth MOS tubes;

[0063] refer to Figure 3 , Figure 3 The utility model is a circuit diagram of a three-phase drive bridge of a first embodiment of an automobile actuator system using a three-phase claw-pole stepping motor.

[0064] Among them, the gates of the first to sixth MOS tubes are all connected to the controller; the drain of the first MOS tube T1, the drain of the third MOS tube T3 and the drain of the fifth MOS tube T5 are connected to the power supply unit Vcc; the source of the first MOS tube T1 is respectively connected to the drain of the second MOS tube T2 and the first end of the first phase inductor U, the source of the third MOS tube T3 is respectively connected to the drain of the fourth MOS tube T4 and the first end of the second phase inductor V, and the source of the third MOS tube T3 is respectively connected to the drain of the sixth MOS tube T6 and the first end of the third phase inductor W; the source of the second MOS tube T2, the source of the fourth MOS tube T4 and the source of the sixth MOS tube are all grounded GND.

[0065] In a specific implementation, a three-phase claw-pole stepper motor can be driven by using a "three-three conduction" method to perform forced dragging to ensure that the motor performance is fully utilized.

[0066] This embodiment adopts a three-phase claw-pole stepper motor for application in an automotive electronic actuator. Compared with a two-phase claw-pole stepper motor, which requires two H-bridges, i.e., eight MOS transistors, the drive circuit of the three-phase claw-pole stepper motor only requires three half-bridges, i.e., six MOS transistors, thus saving the cost of the drive circuit.

[0067] refer to Figure 4 , Figure 4 This is a structural block diagram of a three-phase claw-pole stepper motor of the second embodiment of the utility model of an automobile actuator system using a three-phase claw-pole stepper motor. The three-phase claw-pole stepper motor 1 includes: a motor housing, a motor shaft, a rotor, three bobbins and two stators at both ends of each bobbin:

[0068] The rotor is located in the cavity of the motor housing and connected to the motor shaft, and is a cylindrical permanent magnet; each of the stators is evenly arranged on both sides of each phase wire frame to form a single phase.

[0069] Wherein, the stator comprises: a first side stator and a second side stator having the same number of stator teeth;

[0070] Wherein, the first side stator is arranged on one side of the wire rack;

[0071] The second side stator is arranged on the other side of the bobbin.

[0072] Each phase stator comprises: a bobbin for placing windings, a first side stator located on one side of the bobbin, and a second side stator located on the other side of the bobbin;

[0073] The first side stator, the bobbin frame and the second side stator are stacked from top to bottom to form a one-phase stator structure;

[0074] The three-phase stator includes: a U-phase stator, a V-phase stator and a W-phase stator;

[0075] The U-phase stator, the V-phase stator and the W-phase stator are stacked from top to bottom.

[0076] It should be noted that the three-phase stator winding of a common three-phase claw-pole stepper motor has three stacks in the axial direction, and the three-phase winding can be connected to three output terminals in Y or Δ; its rotor is a cylindrical permanent magnet and is connected to the motor shaft.

[0077] In a specific implementation, the stator has a three-phase stator winding. The special feature of the stator winding is that each winding adopts an axial stacking structure. Each winding will generate an axial magnetic flux during the power-on process, and the teeth of the upper and lower parts of each stacked stator will generate N-pole magnetic field and S-pole magnetic field. The NS-pole magnetic field generated by the power-on attracts the permanent magnet rotor to rotate.

[0078] In this embodiment, three output terminals are connected through a three-phase winding Y or Δ; its rotor is a cylindrical permanent magnet and is connected to the motor shaft. The application of a three-phase claw-pole stepper motor to replace the existing two-phase claw-pole stepper motor in the automobile's execution controller can improve the actuator's high-speed load capacity and reduce operating jitter.

[0079] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automotive actuator system using a three-phase claw-pole stepper motor, characterized in that: The automobile actuator system using the three-phase claw-pole stepper motor comprises: a three-phase claw-pole stepper motor, a controller and a drive unit: The controller is connected to the three-phase claw-pole stepper motor and the drive unit respectively, the drive unit is connected to the three-phase claw-pole stepper motor, and the three-phase claw-pole stepper motor is connected to a load; The controller is used to detect the three-phase electrical parameters of the three-phase claw-pole stepper motor, and output corresponding drive signals to the drive unit based on the frequency and amplitude of the three-phase electrical parameters; The driving unit is used to drive the three-phase claw-pole stepper motor to drive the load according to the operating parameters corresponding to the driving signal when receiving the driving signal.

2. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 1, characterized in that: The controller comprises: a current sampling unit and a control chip; The current sampling unit is connected to the three-phase claw-pole stepper motor and the control chip respectively, and the control chip is also connected to the drive unit; The current sampling unit is used to collect the three-phase electrical parameters of the three-phase claw-pole stepper motor and output the three-phase current signal to the control chip; The control chip is used to output a corresponding driving signal to the driving unit based on the frequency and amplitude of the three-phase electrical parameters.

3. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 2, characterized in that: The automobile actuator system using the three-phase claw-pole stepper motor further includes: a power supply unit; The power supply unit is connected to the controller and the three-phase claw-pole stepper motor respectively; The power supply unit is used to provide the required operating voltage for the controller and the three-phase claw-pole stepper motor.

4. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 3, characterized in that: The driving unit comprises: a three-phase driving bridge; The input end of the three-phase drive bridge is connected to the controller and the three-phase claw-pole stepper motor; The three-phase drive bridge is used to receive the drive signal output by the controller and chop the working voltage of the three-phase claw-pole stepper motor based on the drive signal; The three-phase drive bridge is also used to drive the three-phase claw-pole stepper motor to drive the load according to the operating parameters corresponding to the drive signal using the chopped working voltage.

5. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 4, characterized in that: The controller is also used to input the driving signal to the three bridge arms of the three-phase drive bridge at the same time, and control the three bridge arms of the three-phase drive bridge to operate simultaneously.

6. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 4, characterized in that: The three-phase drive bridge comprises: first to sixth MOS tubes; Among them, the gates of the first to sixth MOS tubes are all connected to the controller; the drains of the first MOS tube, the drains of the third MOS tube and the fifth MOS tube are connected to the power supply unit; the source of the first MOS tube is respectively connected to the drain of the second MOS tube and the first end of the first phase inductor, the source of the third MOS tube is respectively connected to the drain of the fourth MOS tube and the first end of the second phase inductor, and the source of the third MOS tube is respectively connected to the drain of the sixth MOS tube and the first end of the third phase inductor; the source of the second MOS tube, the source of the fourth MOS tube and the source of the sixth MOS tube are all grounded.

7. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 1, characterized in that: The three-phase claw-pole stepper motor comprises: a motor housing, a motor shaft, a rotor, three bobbins and two stators at both ends of each bobbin: The rotor is located in the cavity of the motor housing and connected to the motor shaft, and is a cylindrical permanent magnet; each of the stators is evenly arranged on both sides of each phase wire frame to form a single phase.

8. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 7, characterized in that: The stator comprises: a first side stator and a second side stator having the same number of stator teeth; Wherein, the first side stator is arranged on one side of the wire rack; The second side stator is arranged on the other side of the bobbin.

9. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 8, characterized in that: Each phase stator comprises: a bobbin for placing windings, a first side stator located on one side of the bobbin, and a second side stator located on the other side of the bobbin; The first side stator, the bobbin and the second side stator are stacked from top to bottom to form a one-phase stator structure.

10. The automotive actuator system using a three-phase claw-pole stepper motor as claimed in claim 8, characterized in that: The three-phase stator includes: a U-phase stator, a V-phase stator and a W-phase stator; The U-phase stator, the V-phase stator and the W-phase stator are stacked from top to bottom.

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