Braking rotating device with power generation function, self-powered rotating system and wire cup

Abstract

The utility model provides a braking rotating device with a power generation function, a self-powered rotating system and a wire cup, and the braking rotating device comprises a stator part which comprises three groups of coils arranged at intervals in the circumferential direction; the rotor part rotates coaxially with the stator part and comprises a plurality of magnets which are arranged at intervals in the circumferential direction and have alternately changed polarities; the self-power-generation brake part generates power based on rotation of the rotor part relative to the stator part and performs brake control on the rotor part based on a received brake signal, the self-power-generation brake part comprises a three-phase rectifier bridge circuit, and three phase current ends of the three-phase rectifier bridge circuit are respectively connected with the three groups of coils; at least one phase of the three-phase rectifier bridge circuit is provided with a switching device, at least one phase of the three-phase rectifier bridge circuit is not provided with a switching device, and when an enabling end of the switching device receives a brake signal, a phase current end of the phase where the switching device is located and a common anode or a common cathode of the three-phase rectifier bridge circuit are conducted.

Description

Technical Field

[0001] This application belongs to the field of electronic power technology, specifically providing a brakeable rotating device with power generation function, a self-powered rotating system, and a spool. Background Technology

[0002] Small coaxial rotating structures are common mechanical structures in daily life. They generally include a stator structure and a rotor structure that can rotate coaxially around the stator. A typical application of this small coaxial rotating mechanism is as the rotating part of various line winding devices. For example, a fishing spool (or reel) used for loading and unloading fishing line in fishing tackle includes a spool shaft fixedly connected to the fishing rod and a spool tube that can rotate around the spool shaft. The outer wall of the spool tube is used to wind the fishing line. Similarly, yarn tubes used in the textile industry also include a fixed tube shaft and a rotatable tube body. The outer side of the tube body is used to wind the yarn.

[0003] The aforementioned process of using the fishing line spool and yarn tube ensures that the rotational speed of the rotatable part matches the line speed, which is one of the key factors for achieving good line winding. For example, during the line letting-out process, when the line speed decreases, it is necessary to brake the spool or yarn tube to avoid "line breakage" caused by its rotational speed exceeding the line letting-out speed. This function can be achieved using electronic braking. Specifically, an electromagnetic induction coil is placed on the fixed part, and a permanent magnet is placed on the rotatable part. During rotation, a switching transistor conducts a "short-circuit" of the induction coil, using the induced current to generate braking torque, thereby achieving braking. Chinese invention patent CN110622927A provides an automatic braking system for a rocker wheel, which employs this electronic braking method.

[0004] Since the aforementioned electronic braking device requires the switching transistor to be controlled by a control module such as an MCU, a reliable power supply is needed to the control module in order to ensure that an effective braking action can be generated under any circumstances. However, when the aforementioned coaxial rotating structure is applied to smaller fishing line spools or yarn tubes, it is generally difficult to provide sufficient space for the power supply section. In addition, in order to further optimize the size of small devices, while ensuring the accuracy of braking control, it is also necessary to further simplify the circuit topology. Utility Model Content

[0005] To address the problems existing in the prior art, this application provides a brakeable rotating device with power generation function through embodiments. The device includes:

[0006] The stator section includes three sets of coils spaced apart circumferentially;

[0007] The rotor section is configured to rotate coaxially with respect to the stator section, and includes a plurality of magnets arranged circumferentially at intervals and with alternating polarities.

[0008] The self-generating braking unit generates electricity based on the rotation of the rotor relative to the stator and controls the braking of the rotor based on a received braking signal.

[0009] The self-generating brake unit includes a three-phase rectifier bridge circuit, and the three phase current terminals of the three-phase rectifier bridge circuit are respectively connected to the three sets of coils;

[0010] The three-phase rectifier bridge circuit has at least one phase equipped with a switching device and at least one phase without a switching device. When the enable terminal of the switching device receives a braking signal, it conducts the phase current terminal of its phase to the common anode or common cathode of the three-phase rectifier bridge circuit.

[0011] The brakeable rotating device provided in this application, by setting a self-generating braking section in the coaxial rotating structure and rationally setting the number and position of switching devices in the three-phase rectifier bridge circuit, can fully utilize the rotational power generation of the rotor to provide power to the functional module controlling the braking. Simultaneously, by using either at least one phase without a switching device or at least one phase with a switching device, the circuit structure is effectively simplified. This ensures reliable power supply to the functional module controlling the braking even when the rotating structure is not in operation for extended periods, guaranteeing that braking action can be ensured under any circumstances without the need for a separate, bulky battery or other power supply module. Furthermore, compared to existing technologies, this reduces the number of bulky switching devices such as MOSFETs while maintaining braking control accuracy. The reliability of the generated current is ensured by not setting a switching device in one phase of the three-phase rectifier bridge circuit, contributing to the miniaturization, integration, and stable operation of the device.

[0012] This application also provides a spool through embodiments, including a cylindrical spool body and the aforementioned brakeable rotating device with power generation function; the spool body is fixedly connected to the rotor portion.

[0013] This application also provides a self-powered rotation system through embodiments, including:

[0014] Control unit;

[0015] The stator section includes three sets of coils spaced apart circumferentially;

[0016] The rotor section is configured to rotate coaxially with respect to the stator section, and includes a plurality of magnets arranged circumferentially at intervals and with alternating polarities.

[0017] The self-generating braking unit supplies power to the control unit based on the rotation of the rotor relative to the stator, and performs braking control on the rotor based on a braking signal received from the control unit.

[0018] The self-generating brake unit includes a three-phase rectifier bridge circuit, and the three phase current terminals of the three-phase rectifier bridge circuit are respectively connected to the three sets of coils;

[0019] The three-phase rectifier bridge circuit has at least one phase equipped with a switching device and at least one phase without a switching device. The enable terminal of the switching device is connected to the brake signal output terminal of the control unit, and when it receives the brake signal sent by the control unit, it conducts the phase current terminal of its phase to the common anode or common cathode of the three-phase rectifier bridge circuit.

[0020] This application also provides an electrically controlled spool through embodiments, including a cylindrical spool body and the aforementioned self-powered rotation system; the spool body is fixedly connected to the rotor portion. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an electrically controlled fishing reel;

[0022] Figure 2A A front view of an electrically controlled fishing reel;

[0023] Figure 2B for Figure 2A AA-line sectional view;

[0024] Figure 3 for Figure 1 An exploded view of the spool in the middle;

[0025] Figure 4A This is a schematic diagram showing the arrangement of the rotor and stator sections in some embodiments;

[0026] Figure 4B This is a schematic diagram showing the arrangement of the rotor and stator sections in some embodiments;

[0027] Figure 5A This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0028] Figure 5B For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of the current flow at a given moment;

[0029] Figure 5C For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0030] Figure 5D For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0031] Figure 5E For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0032] Figure 5F For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0033] Figure 5G For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0034] Figure 5H For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0035] Figure 5I For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0036] Figure 5J For the brakeable rotating device with power generation function provided according to the embodiments of this application, A schematic diagram of current flow at a given moment;

[0037] Figure 5K This is a schematic diagram showing the distribution of the brakeable time period of the W phase of the brakeable rotating device with power generation function provided according to the embodiments of this application;

[0038] Figure 5L This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0039] Figure 6A This is a circuit diagram of a self-powered rotating system provided according to an embodiment of this application;

[0040] Figure 6B This is a circuit diagram of a self-powered rotating system provided according to an embodiment of this application;

[0041] Figure 7A This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0042] Figure 7B This is a schematic diagram showing the distribution of the brakeable time period of the W phase of the brakeable rotating device with power generation function provided according to the embodiments of this application;

[0043] Figure 8 This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0044] Figure 9A This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0045] Figure 9B This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0046] Figure 9C This is a circuit diagram of a brakeable rotating device with power generation function provided according to an embodiment of this application;

[0047] Figure 10 This is a flowchart illustrating the control of the self-powered rotating system provided in this application in some embodiments;

[0048] Figure 11 This is a flowchart illustrating the control of the self-powered rotation system provided in this application in some other embodiments. Detailed Implementation

[0049] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0050] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0051] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0052] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0053] Figure 1 The three-dimensional structure of an electronically controlled fishing reel is shown. Figure 2A Its front view, such as Figure 1 and Figure 2A As shown, the electric fishing reel includes a housing 1, a crank handle 4, a winding guide structure 3, and an electrically controllable spool 2 that is generally housed in the housing.

[0054] Figure 2B for Figure 2A The AA-line sectional view (which hides the front cover, rear cover, and other structures) is shown in the image. Figure 3 for Figure 1 Exploded view of the center line cup 2, see reference. Figure 2B and Figure 3 The line spool 2 includes an integrally formed cup body 21, which is cylindrical in shape. Its outer wall is the area for winding the fishing line. In order to ensure that the fishing line does not come out at both ends of the cup body, preferably, its two ends are formed into stepped or arc-shaped annular protrusions 211 and 212 by extending radially outward.

[0055] The spool 2 has an integrally formed spool shaft 22 and partition 23 inside. The spool shaft 22 is located on the axis of the spool and is rotatably connected to the outer casing 1 via bearings 61 and 62. When reeling in the line, the crank handle 4 drives the spool shaft 22 through the transmission structure 15, thereby rotating the spool and winding the fishing line around it. During this process, the winding conductor structure achieves uniform winding of the fishing line around the spool through reciprocating motion. The structure of the fishing reel described above is well known to those skilled in the art; for example, refer to the specification and drawings of patent CN222216929U.

[0056] During the casting and line release process, the spool is pulled by the fishing line and thus rotates. To prevent the "line breakage" phenomenon caused by the rotation speed of the spool surface being greater than the line speed after the line release speed decreases, the spool can be electrically braked after the line release speed decreases.

[0057] The aforementioned electric brake operation can be achieved using the principle of electromagnetic induction, through the cooperating stator section 25 and rotor section 24, as described in the reference. Figure 3The stator portion 25 can be fixedly connected to the outer casing 1 or a structure such as a fixed frame 14 fixedly disposed within the outer casing by means of bonding, plugging, etc.; or, the stator portion 25 can also be integrally formed with the fixed frame 14 or other structures. In this application, the above-mentioned methods of keeping the two parts of the structure fixed can all be referred to as fixed connection.

[0058] Three sets of coils are arranged circumferentially on the stator section 25. Generally, these three sets of coils can be considered as part of the stator section 25. In some embodiments, the three sets of coils can be arranged as follows: Figure 4A As shown, using a star (Y) winding method, one end of the three sets of coils is connected together to form a neutral point (also called a star point), and the other three ends are each led out as a phase current output terminal (corresponding to phases U, V, and W, or phases A, B, and C, respectively); or, the three sets of coils can also be as follows... Figure 5L As shown, a triangular (△) winding method is used, with three sets of coils connected end-to-end to form a closed triangle, and each connection point leads to a phase current output terminal. Furthermore, in some embodiments, each corresponding set of coils can be composed of sub-coils wound on multiple winding posts, for example, as... Figure 4B As shown, there are three sets of coils corresponding to U, V, and W. Each set is wound around four winding posts and connected in series (for example, sub-coils W1, W2, W3, and W4 in the figure), thus forming three sets of coils, each set including four sub-coils.

[0059] The rotor part 24 is configured to rotate coaxially with respect to the stator part 25. Similar to the fixing method of the stator part 25, the rotor part 24 can be fixedly connected to the inside of the cylindrical cup body 21 by means of bonding, plugging or other methods. Alternatively, a baffle 23 can be fixedly connected inside the cup body 21 to form a cylindrical rotor mounting part 231, thereby achieving a fixed connection between the rotor part 24 and the cup body 21. Alternatively, the rotor part 24 can also be integrally formed with the cup body 21, that is, the cup body 21 itself is also a component of the rotor part 24.

[0060] A plurality of magnets are arranged circumferentially on the rotor section 24. These magnets can be fixed to the rotor section 24 by means of bonding, interference fit, etc. (obviously, they need to be positioned facing the coil). The polarities of adjacent magnets are opposite, that is, the magnetic poles of each magnet change alternately. Similarly, these magnets can also be regarded as components of the rotor section.

[0061] It should be noted that the structure of the stator 25 and the winding method of the three sets of coils that are components of the stator 25, as well as the arrangement of the rotor 24 and the magnets that are components of the rotor 24, are all illustrative and do not constitute a limitation of this application. Those skilled in the art can adjust the structure of the spool according to the specific application scenario or technical specifications. For example, the spool body and the spool shaft can be separated, with the spool shaft as part of the stator and a winding post formed on it, and then three sets of coils can be wound on it. It can be seen that the spool shaft can be a component of the stator or the rotor, depending on the application of the spool. For example, for electric fishing spools, it is more appropriate to set the spool shaft and the spool body as one piece due to the need for manual line reeling; however, for some spool structures that only rotate in one direction, the spool shaft can remain stationary while the spool body rotates relative to the spool shaft.

[0062] Due to the presence of coils and magnets, when the rotor 24 rotates relative to the stator 25, the rotating magnets cut the coils to generate an induced electromotive force. By controlling the on / off state of the switching devices provided between each coil and the grounding terminal through the control unit, the coil and the grounding terminal can be switched between an open circuit state and a short circuit state. In the open circuit state, since there is no induced current, the spool rotates freely with very little resistance. When the coil and the grounding terminal are connected to form a short circuit, a large induced current will be generated in the short-circuited coil. The induced current generates a reverse magnetic field, thereby forming a braking force on the rotor 24. Obviously, by adjusting the duty cycle of the on / off signal, the magnitude of the braking force can be controlled.

[0063] The control unit typically uses a microcontroller unit (MCU) module to control the switching on and off of the corresponding switching transistors for each group of coils, such as... Figure 2B As shown, the control unit and various switching transistors can be mounted on the circuit board 52 and integrated inside the control frame 14. Clearly, to ensure effective braking under all conditions, a reliable power supply is required. However, for small fishing reels or yarn tubes with strict size requirements, the circuit board 52 used to house the control unit is generally very small to improve product integration. If a bulky battery holder for dry cell batteries or a rechargeable battery module with a charging interface is added to it, it will inevitably encroach on the space of other functional modules. Furthermore, even with the aforementioned power supply module, the fishing reel or yarn tube may still run out of power if it is not used for an extended period. Therefore, the existing electronic braking method needs to be improved so that the control unit can be powered promptly in response to the rotation of the reel, even when not in use for a long time.

[0064] At the same time, while ensuring braking control accuracy, it is necessary to further simplify the circuit topology to meet the needs of equipment miniaturization and integration.

[0065] To achieve the above objectives, this application provides a brakeable rotating device with a power generation function. This device can be applied to the aforementioned small spool, applying a braking force to the spool as it rotates, and is able to output electrical energy using the rotation of the spool.

[0066] In the embodiments of this application, the brakeable rotating device with power generation function includes the following parts:

[0067] (1) Stator section, comprising three sets of coils spaced apart circumferentially;

[0068] (2) The rotor section is configured to rotate coaxially with respect to the stator section, and includes a plurality of magnets arranged circumferentially at intervals and with alternating polarities;

[0069] (3) A self-generating braking unit that generates electricity based on the rotation of the rotor relative to the stator and performs braking control on the rotor based on a received braking signal, wherein,

[0070] The self-generating brake unit includes a three-phase rectifier bridge circuit, and the three phase current terminals of the three-phase rectifier bridge circuit are respectively connected to three sets of coils.

[0071] The three-phase rectifier bridge circuit has at least one phase equipped with a switching device and at least one phase without a switching device. When the enable terminal of the switching device receives a braking signal, it conducts the phase current terminal of its phase to the common anode or common cathode of the three-phase rectifier bridge circuit.

[0072] The structure, implementation method and cooperation relationship between the stator part (1) and the rotor part (2) and the spool can be found in the previous description. Hereinafter, the implementation method of the self-generating brake part (3) will be described in detail through the embodiments.

[0073] Example 1:

[0074] Example 1 provides a brakeable rotating device with power generation function. The device includes a stator, a rotor, and a self-generating brake. The stator and rotor can be implemented in any of the ways described above.

[0075] Figure 5A The circuit diagram of the self-generating brake unit is shown below. Figure 5A The self-generating braking unit includes a three-phase rectifier bridge circuit and two switching devices.

[0076] The three-phase rectifier bridge circuit uses six diodes D1 to D6 to form the upper and lower half-bridges for the U, W, and V phases, respectively. The cathode of diode D2 is connected to the anode of diode D1, and the connection point serves as the phase current terminal of the U phase and is connected to the U phase coil. Similarly, the cathode of diode D4 is connected to the anode of diode D3, and the connection point serves as the phase current terminal of the W phase and is connected to the W phase coil. The cathode of diode D6 is connected to the cathode of diode D5, and the connection point serves as the phase current terminal of the V phase and is connected to the V phase coil.

[0077] The anodes of D4, D5, and D6 are interconnected as the common anode of the three-phase rectifier bridge circuit, and the cathodes of D1, D2, and D3 are interconnected as the common cathode of the three-phase rectifier bridge circuit. The load is connected between the common cathode and the common anode. When the three sets of coils rotate in the magnetic field of the stator, the current flows from the coil of one phase (e.g., phase U) through the diode (e.g., D1) of the upper half-bridge of that phase to the common cathode, through the load, and then through the common anode through the diode (e.g., D4) of the lower half-bridge of another phase (e.g., phase W), and finally back to the power supply circuit of the coil of the other phase. During the continuous rotation of the coils, the phase voltages of the three phases change alternately, and the phase lines and diodes forming the power supply circuit also switch alternately, but the power supply current always flows from the common cathode to the common anode.

[0078] Figure 5A The method of supplying power to the load by means of the rotation of the three-phase rectifier bridge circuit shown is well known to those skilled in the art. Based on this, braking the rotating rotor is achieved through… Figure 5A It is implemented by two switching devices located in the lower half-bridge of the W and V phases.

[0079] Specifically, as shown in the figure, both switching devices Q4 and Q6 are NMOS transistors. Switching device Q4 is located between the phase current terminal of phase W (i.e., the connection point between the anode of diode D3 and the cathode of diode D4) and the common anode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are connected to the phase current terminal of phase W and the common anode of the three-phase rectifier bridge circuit, respectively. Its G terminal is used to receive the braking signal of phase W. Similarly, switching device Q6 is located between the phase current terminal of phase V (i.e., the connection point between the anode of diode D5 and the cathode of diode D6) and the common anode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are connected to the phase current terminal of phase V and the common anode of the three-phase rectifier bridge circuit, respectively. Its G terminal is used to receive the braking signal of phase V.

[0080] As those skilled in the art know, when an NMOS transistor is used as a switching device, its source (S) and drain (D) terminals are connected when a high-level signal is input, and disconnected when a low-level signal is input. Therefore, the W-phase braking signal and V-phase braking signal in the figure are the high-level signals that turn on the corresponding NMOS transistors. In some optional embodiments, a continuous high-level signal can be used to continuously turn on switching devices Q4 and Q6, i.e., the braking signal is a continuous level signal; or, in other optional embodiments, the braking signal can also be an alternating level signal, for example, using an alternating level signal with varying frequency (frequency modulation signal), or a pulse width modulation signal (PWM signal) with a fixed frequency and variable duty cycle to construct the braking signal, which can achieve precise control of the braking force. Obviously, when switching devices Q4 and Q6 are alternating level signals, they will be turned on during the high-level period.

[0081] Besides using NMOS transistors as switching devices, PMOS transistors, IGBT power devices, and bipolar transistors can also be used as switching devices. Figure 5A Given the switching devices Q4 and Q6, it is clear that at this point, we only need to determine the corresponding braking signal level based on their conduction characteristics.

[0082] The working process of the self-generating brake unit provided in this embodiment will be described below.

[0083] (I) time

[0084] like Figure 5B As shown, in At a certain moment, the phase voltage of phase U is at its maximum, while the phase voltages of phases W and V are both less than zero, with the phase voltage of phase V being the minimum. At this time, in the three-phase rectifier bridge circuit, the current flows from the phase U coil through the phase current terminal of phase U, diode D1, common cathode, load, and common anode in sequence, and finally flows back to the phase V coil through the phase current terminal of phase V, thus completing the power supply to the load.

[0085] It should be noted that, since no switching devices are installed in phase U in this embodiment, current always flows through the common cathode, through the load, and to the common anode within the 120° range of the highest phase voltage of phase U. In this application, the current flowing through the common cathode and common anode is referred to as the supply current, i.e., the current represented by the green line in the figure. When the load connected between the common cathode and common anode is a control unit, its power consumption and current consumption are extremely small, so the braking force generated on the rotor can be ignored, or it can be considered that it does not brake the rotor.

[0086] (II) time

[0087] like Figure 5C As shown, in At this moment, the phase voltage of phase U is still at its maximum, the phase voltage of phase W enters the positive half-cycle, and the phase voltage of phase V is less than zero and still at its minimum. At this time, when switching device Q4 does not receive a braking signal, it remains in the off state. Figure 5C Similarly, in a three-phase rectifier bridge circuit, the current flows from the U-phase coil through the phase current terminal of the U-phase, diode D1, common cathode, load, and common anode in sequence, and finally flows back to the V-phase coil through the phase current terminal of the V-phase, thus completing the power supply to the load.

[0088] like Figure 5D As shown, if the switching device Q4 receives the W-phase braking signal at this time, causing the W-phase current terminal to conduct between the W-phase current terminal and the ground terminal, then in addition to the supply current, a very large current will appear between the W-phase coil in the positive half-cycle and the V-phase coil in the negative half-cycle without passing through the load, further generating a very large braking force on the rotor, thus achieving braking of the rotor. In this application, the current that does not pass through the common cathode to common anode path but returns directly from one phase coil to another is called the braking current.

[0089] (III) time

[0090] refer to Figure 5E At this time, the voltage of phase W is at its maximum, the voltage of phase V is negative, and the voltage of phase U is negative and at its minimum. When the switching device Q4 does not receive the braking signal of phase W, the three-phase rectifier bridge only includes the supply current flowing sequentially through the current terminal of phase W, diode D3, common cathode, load, common anode, diode D2, and the current terminal of phase U.

[0091] like Figure 5F As shown, when the switching device Q4 receives the W-phase braking signal, the current terminal of the W-phase is short-circuited to the ground terminal, and the braking current flows directly from the W-phase coil back to the U-phase coil, thereby achieving braking of the rotor.

[0092] (IV) time

[0093] like Figure 5G As shown, at this time, the V-phase voltage is at its maximum, the W-phase voltage is still in the positive half-cycle, and the U-phase voltage is negative and at its minimum. The on / off state of the V-phase switching device Q6 will determine whether the three-phase rectifier bridge circuit contains supply current. Specifically, if switching device Q6 does not receive the V-phase braking signal, and the W-phase switching device Q4 also does not receive the W-phase braking signal, then the three-phase rectifier bridge circuit will... Figure 5H As shown, only the supply current is included.

[0094] refer to Figure 5HSince the voltage of phase W is still in the positive half-cycle at this time, when the switching device Q6 of phase V remains open to supply power to the load, the switching device Q4 of phase W will still generate a braking current in phase W after receiving the braking signal of phase W and turning on.

[0095] (V) time

[0096] See Figure 5I and Figure 5J ,exist At this moment, the voltage of phase V is at its maximum, while phase W is in the negative half-cycle and at its minimum. At this time, the switching of the supply current or braking current in the three-phase rectifier bridge is determined only by the on / off state of the switching device of phase V. The on / off state of the switching device Q4 of phase W does not affect the supply current or braking current in the three-phase rectifier bridge circuit.

[0097] The above provides a detailed explanation of the power supply to the load and the braking action on the rotor caused by the different on / off states of two switching devices in the three-phase rectifier bridge at various times. Taking phase W as an example, in , , At any given moment, it is in the positive half-cycle of the phase voltage. At this time, regardless of whether its phase voltage is the maximum among the three phases, it will generate a braking current when it receives the W-phase braking signal. At the same time, when it is within the 120° range of the maximum phase voltage among the three phases, it will supply power to the load when it does not receive the W-phase braking signal. Correspondingly, when the voltage at the phase current terminal of the W phase is in the negative half-cycle, it will not generate a braking current even if it receives the W-phase braking signal, that is, its braking function is shielded in the negative half-cycle.

[0098] Combining the braking control performance during both the positive and negative half-cycles, it can be seen that, as Figure 5K As shown, when the switching device is placed between the phase current terminal of its phase and the common anode of the three-phase rectifier bridge circuit, a braking current can be generated to brake the rotor only when the voltage at the phase current terminal of its phase is positive.

[0099] It should be noted that, Figure 5K The phase voltage variation is only used to illustrate the period during which the switching device can be used for braking. In reality, it can be understood that with the braking action performed during the positive half-cycle, after each braking action, the phase voltage will deviate more from the standard sine waveform and get closer to 0 compared to before braking.

[0100] Figure 5L The circuit diagram of the self-generating brake unit is shown in some embodiments when the three sets of coils are connected in a delta configuration.

[0101] In this embodiment, since no switching device is installed in phase U, there is always a current supplying power to the load in the three-phase rectifier bridge circuit when phase U is in the range of maximum phase voltage. By adopting this method of having no switching device in at least one phase and having at least one switching device in at least one phase, the stability and reliability of the electronically controlled braking of the rotor can be greatly increased, especially when the load powered by the self-generated braking unit is used to control its own braking.

[0102] The aforementioned function of providing reliable power to the load controlling its own rotational braking can be achieved through a self-powered rotational system provided in this application, which includes:

[0103] (1) Control unit;

[0104] (2) Stator section, comprising three sets of coils arranged at intervals along the circumference;

[0105] (3) The rotor section is configured to rotate coaxially with respect to the stator section, and includes a plurality of magnets arranged circumferentially and with alternating polarities.

[0106] (4) A self-generating braking unit that supplies power to the control unit based on the rotation of the rotor relative to the stator, and performs braking control on the rotor based on the braking signal received by the self-generating control unit, wherein,

[0107] The self-generating brake unit includes a three-phase rectifier bridge circuit, and the three phase current terminals of the three-phase rectifier bridge circuit are respectively connected to three sets of coils.

[0108] The three-phase rectifier bridge circuit has at least one phase equipped with a switching device and at least one phase without a switching device. The enable terminal of the switching device is connected to the brake signal output terminal of the control unit, and when it receives the brake signal sent by the control unit, it conducts the phase current terminal of its phase to the common anode or common cathode of the three-phase rectifier bridge circuit.

[0109] The structure, implementation method, and cooperation relationship between the stator section (2) and the rotor section (3) mentioned above and the spool can be found in the previous description, and will be explained below. Figures 5A to 5J As shown in the figures, the control unit can be placed between the common cathode and the common anode, that is, the control unit is used as a load, and the self-generating brake unit supplies power to it by rotating the spool. The load (i.e. the control unit) then generates a brake signal to control the rotor, thereby realizing the self-powered electronic brake function.

[0110] In some embodiments, the control unit described above serves as a load, including an MCU module, for acquiring the rotational speed of the rotor relative to the stator and generating a braking signal for braking control of the rotor based on the rotational speed. Techniques for determining information such as the speed and acceleration of the rotor by detecting or sampling the rotational speed are known to those skilled in the art and will not be elaborated upon here.

[0111] In some embodiments, the control unit, as a load, also includes an energy storage module. It should be noted that in the embodiments of this application, the energy storage module is provided for the control unit. Its function is not to continuously supply power to the MCU and other functional modules in the control unit that require power when it is not in use for a long time, but to temporarily store the electrical energy generated when the rotor rotates to generate electricity and the three-phase rectifier bridge circuit is in the power generation state, and to supply power to the MCU and other functional modules in the control unit that require power when it is in the non-power generation state, so that the MCU does not lose power due to the lack of power supply current flowing through the MCU during the braking control process.

[0112] Obviously, since at least one phase of the solution in this application does not have a switching device, there will be a supply current for at least 1 / 3 of the cycle during the rotation of the rotor. The amount of electricity stored in the energy storage module only needs to be sufficient to provide power to the MCU during the 2 / 3 rotation of the rotor. Therefore, its capacity and size can be set to be extremely small to meet the requirements of product miniaturization and integration.

[0113] For example, in some preferred embodiments, a supercapacitor can be selected as the energy storage module, with a capacity not exceeding 1F and a maximum size not exceeding 5cm; furthermore, when using a low-power MCU with a supply voltage of 3.3V, the supercapacitor's capacity can not exceed 0.22F, its diameter can not exceed 7mm, and its height can not exceed 2mm.

[0114] Example 2:

[0115] This embodiment provides a self-powered rotating system, which includes a control unit, a stator, a rotor, and a self-generating brake unit. The stator, rotor, and self-generating brake unit can be implemented in any of the ways described above.

[0116] Figure 6A The architecture of the control unit and the self-generating braking unit in this embodiment is shown, as follows: Figure 6A As shown, the control unit is located between the common cathode and common anode of the three-phase rectifier bridge circuit. That is, the control unit is the load in Embodiment 1, and is powered by the three-phase rectifier bridge circuit based on the rotation of the rotor.

[0117] Furthermore, such as Figure 6AAs shown, the braking signals for the W-phase switching device Q4 and the V-phase switching device Q6 are output by the control unit. For example, different I / O ports of the MCU in the control unit can be used as the output terminals of the W-phase braking signal and the V-phase braking signal. By outputting PWM signals with alternating high and low levels, the switching devices Q4 and Q6 are controlled to switch on and off, so as to realize braking control.

[0118] As analyzed above, when using Figure 6A In the self-powered brake control shown, an additional power supply circuit without any switching devices is set up, which is particularly beneficial to ensure the reliability and stability of the brake control. This is because, without a dedicated long-term power supply module, the control unit has a certain probability of being in a power-off state after the inductor and other components have been idle for a period of time. At this time, its I / O port used to output control signals may be in a "floating" state. Although adding pull-up / pull-down resistors and other structures can keep its potential in a preset state, this will inevitably increase the complexity of the circuit structure. Therefore, the solution in this application can simplify the circuit structure while ensuring that the control unit will inevitably start and enter the working state due to the rotation of the rotor.

[0119] Figure 6B The specific circuit diagram of the control unit in this embodiment is shown. It should be noted that... Figure 6B The specific circuit shown does not constitute a limitation of this application. Those skilled in the art can achieve specific performance requirements by adding or replacing modules and components in the above circuit without departing from the concept of the technical solution of this application.

[0120] Example 3:

[0121] This embodiment provides a brakeable rotating device with power generation function.

[0122] Figure 7A The circuit diagram of the self-generating brake unit in this embodiment is shown. Figure 7A As can be seen, this embodiment also sets up two switching devices as in embodiment 1. The difference is that in this embodiment, the switching devices of phase W and phase V are respectively set between the current terminal of their respective phase and the common cathode of the three-phase rectifier bridge circuit.

[0123] Specifically, both switching devices Q3 and Q5 are PMOS transistors. Switching device Q3 is located between the phase current terminal of phase W (i.e., the connection point between the anode of diode D3 and the cathode of diode D4) and the common cathode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are connected to the phase current terminal of phase W and the common cathode of the three-phase rectifier bridge circuit, respectively. Its G terminal is used to receive the braking signal of phase W. Similarly, switching device Q5 is located between the phase current terminal of phase V (i.e., the connection point between the anode of diode D5 and the cathode of diode D6) and the common cathode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are connected to the phase current terminal of phase V and the common cathode of the three-phase rectifier bridge circuit, respectively. Its G terminal is used to receive the braking signal of phase V.

[0124] Figure 7B Taking phase W as an example, a schematic diagram showing the distribution of the braking time periods in phase W is provided for reference. Figures 5B to 5J The analysis focuses on the braking control action of the switching devices located in the upper half-bridge, combined with... Figure 7B It is known that when the switching device is placed between the phase current terminal of its phase and the common cathode of the three-phase rectifier bridge circuit, a braking current can be generated to brake the rotor only when the voltage of the phase current terminal of its phase is negative.

[0125] Example 4:

[0126] This embodiment provides a brakeable rotating device with power generation function.

[0127] Figure 8 The circuit diagram of the self-generating brake unit in this embodiment is shown. Figure 8 It can be seen that the two switching devices Q5 and Q6 can also be placed in the upper and lower half-bridge structures of the same phase. It is understandable that when only one phase has a switching device, the proportion of time dedicated to power supply will increase.

[0128] In addition to the multiple embodiments of the two switching devices described above, the number of switching devices can also be changed, for example, Figure 9A , Figure 9B and Figure 9C Examples of self-generating braking units with one, three, and four switching devices are shown respectively. It can be seen that by adjusting the number of switching devices, the number of phases without switching devices (corresponding to the proportion of the interval that ensures power supply to the load) and the braking control fineness in the phases with switching devices (corresponding to braking during the positive half-cycle and / or braking during the negative half-cycle) can be changed simultaneously.

[0129] Some embodiments of this application provide a spool, which includes a cylindrical spool body and the aforementioned brakeable rotating device with power generation function. The spool body is fixedly connected to the rotor part, and the specific fixed connection method has been described in detail above and will not be repeated here.

[0130] Some embodiments of this application provide an electrically controlled spool, which includes a cylindrical spool body and the aforementioned self-powered rotation system. The spool body is fixedly connected to the rotor, and the specific fixed connection method has been described in detail above and will not be repeated here.

[0131] In some embodiments, the process of controlling the aforementioned self-powered rotating system is as follows: Figure 10 As shown, the following operations are included:

[0132] Step 210: Operation of the control unit based on the rotation of the rotor relative to the stator;

[0133] Step 220: Obtain the rotational speed of the rotor relative to the stator.

[0134] Step 230: Output the braking signal based on the rotational speed.

[0135] Obviously, the above steps can be performed continuously during the rotation of the rotor relative to the stator until the rotor stops rotating.

[0136] Figure 10 The control flow shown can be used for self-powered braking control of structures that rotate in one direction. When the structure to be controlled can rotate in both directions (such as the spool of a fishing reel that can both take in and release line), the direction of rotation also needs to be taken into account. Therefore, in some other embodiments, such as... Figure 11 As shown, the aforementioned self-powered rotating system can be controlled through the following operations:

[0137] Step 310: Operation of the control unit based on the rotation of the rotor relative to the stator;

[0138] Step 320: Obtain the rotational speed and direction of rotation of the rotor relative to the stator.

[0139] Step 330: Output a braking signal based on the rotational speed and rotational direction.

[0140] The determination of rotation speed and direction can be achieved using various methods known to those skilled in the art. For example, photoelectric sensors can be used to detect the rotation speed and direction of the spool, or the rotation speed and direction can be determined by the frequency and sequence of the alternating changes of the three-phase voltages U, W, and V.

[0141] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A rotatable device with brake and power generation function, comprising: a stator part comprising three groups of coils arranged at intervals in the circumferential direction; a rotor part arranged to rotate coaxially relative to the stator part, comprising a plurality of magnets arranged at intervals in the circumferential direction and with alternating polarities; characterized in that it further comprises a self-power-generation brake part that generates power based on the rotation of the rotor part relative to the stator part and brakes the rotor part based on a received brake signal, wherein the self-power-generation brake part comprises a three-phase rectifier bridge circuit, and the three-phase rectifier bridge circuit has three phase current terminals respectively connected to the three groups of coils; at least one phase of the three-phase rectifier bridge circuit is provided with a switching device, and at least one phase of the three-phase rectifier bridge circuit is not provided with a switching device, and the enable terminal of the switching device is connected to the common anode or common cathode of the three-phase rectifier bridge circuit when a brake signal is received. 2.The rotatable device with brake and power generation function according to claim 1, characterized in that the switching device is arranged between the phase current terminal of the phase in which the switching device is located and the common anode of the three-phase rectifier bridge circuit, or the switching device is arranged between the phase current terminal of the phase in which the switching device is located and the common cathode of the three-phase rectifier bridge circuit. 3.The rotatable device with brake and power generation function according to claim 2, characterized in that when the switching device is arranged between the phase current terminal of the phase in which the switching device is located and the common anode of the three-phase rectifier bridge circuit, a brake current for braking the rotor part can be generated only when the voltage of the phase current terminal of the phase in which the switching device is located is positive; when the switching device is arranged between the phase current terminal of the phase in which the switching device is located and the common cathode of the three-phase rectifier bridge circuit, a brake current for braking the rotor part can be generated only when the voltage of the phase current terminal of the phase in which the switching device is located is negative. 4.The rotatable device with brake and power generation function according to claim 3, characterized in that the brake current does not pass through the path between the common cathode and the common anode of the three-phase rectifier bridge circuit. 5.The rotatable device with brake and power generation function according to claim 2, characterized in that the number of switching devices is two, and the two switching devices are arranged in different phases of the three-phase rectifier bridge circuit. 6.The rotatable device with brake and power generation function according to claim 5, characterized in that the two switching devices are both arranged between the phase current terminal of the phase in which the switching device is located and the common anode of the three-phase rectifier bridge circuit; or the two switching devices are both arranged between the phase current terminal of the phase in which the switching device is located and the common cathode of the three-phase rectifier bridge circuit, or one of the two switching devices is arranged between the phase current terminal of the phase in which the switching device is located and the common anode of the three-phase rectifier bridge circuit, and the other switching device is arranged between the phase current terminal of the phase in which the switching device is located and the common cathode of the three-phase rectifier bridge circuit. 7.The rotatable device with brake and power generation function according to claim 2, characterized in that The number of the switching devices is two, the two switching devices are arranged in the same phase of the three-phase rectifier bridge circuit, and one of the switching devices is arranged between the phase current end of the phase in which it is arranged and the common anode of the three-phase rectifier bridge circuit, and the other switching device is arranged between the phase current end of the phase in which it is arranged and the common cathode of the three-phase rectifier bridge circuit. 8.The rotatable device with brake function and power generation function according to claim 2, wherein, The number of the switching devices is three or four. 9.The rotatable device with brake function and power generation function according to claim 1, wherein, The switching device is a MOS tube, an IGBT power device or a triode. The brake signal is a continuous level signal or an alternating level signal for turning on the switching device. 10.The rotatable device with brake function and power generation function according to claim 1, wherein, The common cathode and the common anode of the three-phase rectifier bridge circuit are connected with a load. 11.The rotatable device with brake function and power generation function according to claim 10, wherein, The load is powered by the self-power generation brake part, and generates a brake signal for brake control of the rotor part. 12.The rotatable device with brake function and power generation function according to claim 11, wherein, The load comprises an MCU module for obtaining the rotating speed of the rotor part relative to the stator part, and generating a brake signal for brake control of the rotor part based on the rotating speed. 13.The rotatable device with brake function and power generation function according to claim 10 or 11 or 12, wherein, The load further comprises a power storage module for temporarily storing the electric energy generated when the three-phase rectifier bridge circuit is in the power generation state. 14.The rotatable device with brake function and power generation function according to claim 1, wherein, The three groups of coils adopt star connection or delta connection. 15.A wire cup comprising a cylindrical cup body, characterized in that, Further comprising the rotatable device with brake function and power generation function according to claim 1, wherein, The cup body is fixedly connected with the rotor part.

16. A self-powered rotating system, characterized by, Comprise: a control unit; a stator part comprising three groups of coils arranged at intervals in the circumferential direction; a rotor part arranged to rotate coaxially relative to the stator part, comprising a plurality of magnets arranged at intervals in the circumferential direction and having alternating polarities; characterized in that, further comprising a self-power generation brake part for powering the control unit based on the rotation of the rotor part relative to the stator part, and brake control of the rotor part based on the brake signal received from the control unit, wherein, The self-power generation brake part comprises a three-phase rectifier bridge circuit, and three phase current ends of the three-phase rectifier bridge circuit are connected with the three groups of coils respectively; At least one phase of the three-phase rectifier bridge circuit is provided with a switching device, and at least one phase is not provided with a switching device, the enable end of the switching device is connected with the brake signal output end of the control unit, and when receiving the brake signal sent by the control unit, the switching device turns on the phase current end of the phase in which it is arranged and the common anode or the common cathode of the three-phase rectifier bridge circuit.

17. An electrically controlled wire cup comprising a cylindrical cup body, characterized in that, Further comprising the self-powered rotating system of claim 16; wherein, The cup body is fixedly connected with the rotor part.

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