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

Abstract

The invention provides a braking rotating device with a power generation function, a self-powered rotating system, a control method 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, and specifically provides a brakeable rotating device with a power generation function, a self-powered rotating system and its control method, and a spool. Background Art

[0002] The small coaxial rotating structure is a common mechanical structure in daily life, generally including a stator structure and a rotor structure that can rotate coaxially around the stator part. A typical application of this small coaxial rotating mechanism is that it can be used as the rotating part of various winding devices. For example, the fishing line spool (or called fishing reel) used on fishing tackle includes a spool shaft fixedly connected to the fishing rod and a spool barrel that can rotate around the spool shaft. The outer wall of the spool barrel is used for winding fishing line; another example is the yarn tube used in the textile industry, which also includes a fixed tube shaft and a rotatable cylinder body, and the outside of the cylinder body is used for winding yarn.

[0003] In the using process of the above fishing line spool and yarn tube, matching the rotational speed of the rotatable part with the linear speed is one of the key factors for achieving good winding. For example, during the line casting process, when the linear speed decreases, it is necessary to brake the spool barrel or yarn tube to avoid the "line explosion" phenomenon caused by its rotational speed being faster than the casting speed. The above functions can be achieved by means of electronic braking. Specifically, by setting an electromagnetic induction coil on the fixed part and a permanent magnet on the rotatable part, during rotation, the "short-circuit loop" of the induction coil is conducted through a switching tube, and a braking torque is formed by using the induced current, thereby realizing braking. Chinese invention patent CN110622927A provides a reel automatic braking system, which adopts this electronic braking method.

[0004] Since the above electronic braking device needs to control the on-off of the switching tube through a control module such as an MCU, therefore, in order to ensure that an effective braking action can be generated under any circumstances, it is necessary to reliably supply power to the control module. However, when the above coaxial rotating structure is applied to smaller devices such as fishing line spools or yarn tubes, it is generally difficult to provide sufficient accommodation space for the power supply part; in addition, in order to further optimize the size of small devices, while ensuring the braking control accuracy, it is also necessary to further simplify the circuit topology. Summary of the Invention

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

[0006] A stator part, including three groups of coils arranged at intervals in the circumferential direction;

[0007] A rotor part, which is arranged to be able to rotate coaxially relative to the stator part, including a plurality of magnets arranged at intervals in the circumferential direction and with alternating polarities;

[0008] The self-generating brake unit generates electricity based on the rotation of the rotor unit relative to the stator unit and performs brake control on the rotor unit based on a received brake signal, wherein:

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

[0010] The three-phase rectifier bridge circuit has at least one phase with a switching device and at least one phase without a switching device. When receiving a brake signal, the enable end of the switching device conducts the phase current end of the phase to the common anode or common cathode of the three-phase rectifier bridge circuit.

[0011] The brakeable rotating device provided in the present application can fully utilize the rotation of the rotor to generate electricity to power the functional module controlling the brake by setting a self-generating brake part in the coaxial rotating structure and reasonably setting the number and position of the switching devices in the three-phase rectifier bridge circuit; at the same time, at least one phase is not provided with a switching device, and at least one phase is provided with a switching device. Under the premise of effectively simplifying the circuit structure, when the rotating structure does not work for a long time, as the rotation occurs, it can ensure reliable power supply to the functional module controlling the brake, and ensure that there is no need to separately set up a large power supply module such as a battery, so that the braking action can be implemented under any circumstances; at the same time, compared with the prior art, the number of large switching devices such as MOS tubes is reduced on the basis of ensuring the brake control accuracy, and the reliability of the generated current is ensured by not setting a switching device in one of the phases of the three-phase rectifier bridge circuit, which is conducive to the miniaturization, integration and stable operation of the equipment.

[0012] The present application also provides a wire cup through an embodiment, including a cylindrical cup body and the above-mentioned brakeable rotating device with power generation function; the cup body is fixedly connected to the rotor part.

[0013] The present application also provides a self-powered rotation system through an embodiment, including:

[0014] Control unit;

[0015] The stator part includes three groups of coils arranged at intervals along the circumferential direction;

[0016] The rotor part is arranged to be coaxially rotatable relative to the stator part, and includes a plurality of magnets arranged at intervals along the circumference and with alternating polarities;

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

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

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

[0020] The present application also provides an electrically controlled wire cup through an embodiment, comprising a cylindrical cup body and the above-mentioned self-powered rotation system; the cup body is fixedly connected to the rotor part.

[0021] The present application also provides a control method through an embodiment for controlling the above self-powered rotating system, the method comprising the following steps:

[0022] maintaining operation of the control unit based on rotation of the rotor portion relative to the stator portion;

[0023] obtaining a rotational speed of the rotor portion relative to the stator portion, and

[0024] The brake signal is output based on the rotational speed.

[0025] The present application also provides a control method through an embodiment for controlling the above self-powered rotating system, the method comprising the following steps:

[0026] maintaining operation of the control unit based on rotation of the rotor portion relative to the stator portion;

[0027] obtaining the rotation speed and rotation direction of the rotor portion relative to the stator portion, and,

[0028] The brake signal is output based on the rotation speed and the rotation direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an electric-controlled fishing reel;

[0030] Figure 2A is a front view of an electric-controlled fishing reel;

[0031] Figure 2B for Figure 2A AA line section view;

[0032] Figure 3 for Figure 1 An exploded view of the spool in the;

[0033] Figure 4AIn some embodiments, it is a schematic diagram of the arrangement of the rotor part and the stator part;

[0034] Figure 4B In some embodiments, it is a schematic diagram of the arrangement of the rotor part and the stator part;

[0035] Figure 5A It is a schematic circuit diagram of a brakeable rotating device with a power generation function according to an embodiment of the present application;

[0036] Figure 5B It is a schematic diagram of the current flow direction of the brakeable rotating device with a power generation function at time t1 according to an embodiment of the present application;

[0037] Figure 5C It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t2 according to an embodiment of the present application;

[0038] Figure 5D It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t2 according to an embodiment of the present application;

[0039] Figure 5E It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t3 according to an embodiment of the present application;

[0040] Figure 5F It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t3 according to an embodiment of the present application;

[0041] Figure 5G It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t4 according to an embodiment of the present application;

[0042] Figure 5H It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t4 according to an embodiment of the present application;

[0043] Figure 5I It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t5 according to an embodiment of the present application;

[0044] Figure 5J It is a schematic diagram of a current flow direction of the brakeable rotating device with a power generation function at time t5 according to an embodiment of the present application;

[0045] Figure 5K It is a schematic diagram of the distribution of the brakeable time period of the W phase of the brakeable rotating device with a power generation function according to an embodiment of the present application;

[0046] Figure 5LCircuit schematic diagram of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0047] Figure 6A Circuit schematic diagram of a self-powered rotating system according to an embodiment of the present application;

[0048] Figure 6B Circuit schematic diagram of a self-powered rotating system according to an embodiment of the present application;

[0049] Figure 7A Circuit schematic diagram of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0050] Figure 7B Distribution schematic diagram of the brakeable time period of the W phase of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0051] Figure 8 Circuit schematic diagram of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0052] Figure 9A Circuit schematic diagram of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0053] Figure 9B Circuit schematic diagram of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0054] Figure 9C Circuit schematic diagram of a brakeable rotating device with power generation function according to an embodiment of the present application;

[0055] Figure 10 Flow schematic diagram of a control method according to an embodiment of the present application;

[0056] Figure 11 Flow schematic diagram of a control method according to an embodiment of the present application. Detailed implementation manners

[0057] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0058] In addition, for ease of understanding, various components in the drawings are enlarged or reduced, but this is not intended to limit the protection scope of the present application.

[0059] In the description of the embodiments of the present application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed during use, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, in the description of the present application, in order to distinguish different units, terms such as first and second are used in this specification, but these are not restricted by the manufacturing order and should not be construed as indicating or implying relative importance. In the detailed description and claims of the present application, their names may be different.

[0060] The terms used in this specification are for the purpose of describing the embodiments of the present application, but are not intended to limit the present application. It should also be noted that unless otherwise clearly defined and limited, if terms such as "set", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be specifically understood.

[0061] Figure 1 A three-dimensional structure of an electric fishing reel is shown. Figure 2A is its front view, as Figure 1 and Figure 2A shown. The electric fishing reel includes a housing 1, a crank 4, a line guiding structure 3, and a line spool 2 that can be electrically controlled and is generally accommodated in the housing.

[0062] Figure 2B is Figure 2A the sectional view taken along line A-A in Figure 3 is Figure 1 the exploded view of the line spool 2 in Figure 2B and Figure 3 shown. Referring to

[0063] The interior of the spool 2 has an integrally formed spool shaft 22 and a partition 23. The spool shaft 22 is located on the axis of the spool and is rotatably connected to the housing 1 through bearings 61 and 62. When reeling in the fishing line is required, the crank 4 can drive the spool shaft 22 through the transmission structure 15, thereby driving the spool body to rotate, so as to wind the fishing line around the spool body. During this process, the line winding and guiding structure realizes the uniform winding of the fishing line on the spool body through reciprocating motion. The structures of the above-mentioned fishing reels are well-known to those skilled in the art. For example, reference can be made to the specification and drawings of Patent CN222216929U.

[0064] During the process of casting the fishing rod to release the line, the spool is pulled by the fishing line to rotate. In order to avoid the "bird's nest" phenomenon caused by the rotational speed of the spool surface being greater than the line speed after the line release speed of the fishing line decreases, the spool can perform electric braking after the line release speed of the fishing line decreases.

[0065] The operation of the above-mentioned electric braking can utilize the principle of electromagnetic induction and is realized through the mutually cooperating stator part 25 and rotor part 24. Refer to Figure 3 , the stator part 25 can be fixedly connected to the housing 1 or to a fixed frame 14 fixedly arranged inside the housing, etc. through bonding, plugging, etc.; or, the stator part 25 can also be integrally formed with the fixed frame 14 and other structures. In this application, the above-mentioned ways of keeping the two parts fixed can all be referred to as fixed connection.

[0066] Three groups of coils are circumferentially spaced on the stator part 25. Generally, the above three groups of coils can be regarded as part of the stator part 25. In some embodiments, the three groups of coils can be as Figure 4A shown, using the star (Y-type) winding method. One end of the three groups of coils is connected together to form a neutral point (also called star point), and the other three ends are respectively led out as a phase current output terminal (corresponding to U\V\W phases, or A\B\C phases); or, the three groups of coils can also be as Figure 5L shown below, using the delta (△-type) winding method. The three groups of coils are connected end to end to form a closed triangle, and a phase current output terminal is led out from each connection point. In addition, in some embodiments, each group of coils corresponding to one phase can be composed of sub-coils wound around multiple winding posts. For example, as Figure 4B shown, for the three groups of coils corresponding to U, V, and W phases, each group is wound around four winding posts and connected in series (such as the sub-coils W1, W2, W3, and W4 in the figure), so as to form three groups of coils, each group including four sub-coils.

[0067] The rotor part 24 is arranged to be rotatable coaxially relative 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, etc. Or, a baffle 23 can be fixedly connected inside the cup body 21, and then a cylindrical rotor mounting part 231 is formed to realize the fixed connection between the rotor part 24 and the cup body 21. Or, the rotor part 24 and the cup body 21 can also be made by integral molding, that is, the cup body 21 itself is also one of the components of the rotor part 24.

[0068] A plurality of magnets are arranged on the rotor part 24 at intervals in the circumferential direction. The plurality of magnets can be fixed to the rotor part 24 by means of bonding, interference fit, etc. (obviously, it needs to be arranged to face the coil), and the polarities of adjacent magnets are opposite, that is, the magnetic poles of each magnet change alternately. Similarly, the plurality of magnets can also be regarded as components of the rotor part.

[0069] It should be noted that the above structures of the stator part 25, the winding methods of the three groups of coils that are components of the stator part 25, and the setting methods of the rotor part 24 and the magnets that are components of the rotor part 24 are all schematic and do not constitute a limitation to this application. Those skilled in the art can adjust its structure according to the specific use scenario or technical indicators of the spool. For example, the cup body and the cup shaft can be separated, and the cup shaft can be used as a part of the stator part and a winding post is formed on it, and then the three groups of coils are wound on it. It can be seen that the cup shaft can be used as a component of the stator part or a component of the rotor part, which depends on the application occasion of the spool. For example, for an electronically controlled fishing spool, it is a more appropriate choice to set the cup shaft and the cup body as a whole due to the need for manual winding; but for some spool structures that only rotate in a single direction, the cup shaft can also be fixed and the cup body can rotate relative to the cup shaft.

[0070] Due to the existence of the coils and magnets, when the rotor part 24 rotates relative to the stator part 25, the rotating magnets cut the coils to generate an induced electromotive force. By controlling the on-off states of the switching devices arranged between each coil and the ground terminal by the control unit, the coil and the ground terminal can be switched between the open state and the short-circuit state: in the open state, since there is no induced current, the spool rotates freely with very little resistance; when the coil and the ground terminal are conducted to form a short circuit, a large induced current will be generated in the short-circuited coil, and the induced current generates a reverse magnetic field, thereby forming a braking force on the rotor part 24. Obviously, by adjusting the duty cycle of the above on-off signal, the magnitude of the braking force can be controlled.

[0071] The control unit generally selects an MCU microcontroller module (Microcontroller Unit) to control the on-off of the switching tubes corresponding to each group of coils, such asFigure 2B As shown, the control unit and each switch tube can be arranged on the circuit board 52 and integrated into the control frame 14. Obviously, in order to ensure that an effective braking action can be generated under any circumstances, it needs to be reliably powered. However, for small-sized fishing reels or yarn tubes with high size requirements, in order to improve product integration, the size of the circuit board 52 used to lay out the control unit is generally very small. If a battery holder for a larger dry cell or a rechargeable battery module with a charging interface is additionally arranged thereon, it is bound to squeeze the space for other functional modules. In addition, even if the above-mentioned power supply module is provided, if the fishing reel or yarn tube is not used for a long time, it may still run out of power. Therefore, it is necessary to improve the existing electric control braking method so that even if it is not used for a long time, it can respond to the rotation of the reel and supply power to the control unit in time.

[0072] At the same time, while ensuring the braking control accuracy, the circuit topology needs to be further simplified to meet the needs of equipment miniaturization and integration.

[0073] In order to achieve the above objectives, the present application provides a brakeable rotating device with power generation function, which can be applied to the above-mentioned small wire cup, applies braking force to the wire cup when it rotates, and can output electrical energy using the rotation of the wire cup.

[0074] In an embodiment of the present application, a brakeable rotating device with power generation function includes the following parts:

[0075] (1) a stator portion, comprising three sets of coils arranged at intervals in the circumferential direction;

[0076] (2) a rotor portion, arranged to be coaxially rotatable relative to the stator portion, comprising a plurality of magnets arranged at intervals in the circumferential direction and having alternating polarities;

[0077] (3) a self-generating brake unit that generates electricity based on the rotation of the rotor unit relative to the stator unit and performs brake control on the rotor unit based on a received brake signal, wherein:

[0078] 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;

[0079] At least one phase of the three-phase rectifier bridge circuit is equipped with a switching device, and at least one phase is not equipped with a switching device. When the enable end of the switching device receives a brake signal, the phase current end of the phase in which it is located is connected to the common anode or common cathode of the three-phase rectifier bridge circuit.

[0080] For the structures, implementation manners of the above-mentioned (1) stator part and (2) rotor part and their cooperation relationship with the wire cup, reference can be made to the previous description. Below, through embodiments, the implementation manner of the (3) self-generating braking part will be introduced in detail.

[0081] Embodiment 1:

[0082] Embodiment 1 provides a brakeable rotating device with a power generation function. The device includes a stator part, a rotor part, and a self-generating braking part. Among them, the stator part and the rotor part can be implemented in any of the manners introduced above.

[0083] Figure 5A The circuit schematic diagram of the self-generating braking part is shown. Refer to Figure 5A , the self-generating braking part includes a three-phase rectifier bridge circuit and two switching devices.

[0084] The three-phase rectifier bridge circuit respectively forms the upper half bridge and the lower half bridge of the U, W, and V phases through six diodes D1 to D6. Among them, 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.

[0085] The anodes of D4, D5, and D6 are connected to each other as the common anode of the three-phase rectifier bridge circuit, and the cathodes of D1, D2, and D3 are connected to each other as the common cathode of the three-phase rectifier bridge circuit. A load is connected between the common cathode and the common anode. When the three groups of coils rotate in the magnetic field of the stator part, according to the levels of the phase voltages on the three groups of coils, a power supply loop will be formed in which the coils of one phase (for example, the U phase) flow through the diode (for example, D1) of the upper half bridge of this phase to the common cathode, pass through the load, and then flow through the diode (for example, D4) of the lower half bridge of another phase (for example, the W phase) through the common anode, and finally return to the coils of another 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 loop also switch alternately, but the supply current always flows from the common cathode to the common anode.

[0086] Figure 5A The manner in which the three-phase rectifier bridge circuit cooperates with the rotation of the three-phase coils to realize power supply to the load is already well-known to those skilled in the art. On this basis, braking the rotating rotor part is achieved through Figure 5A the two switching devices located in the lower half bridges of the W phase and the V phase in

[0087] Specifically, as shown in the figure, both the switching device Q4 and the switching device Q6 are NMOS transistors. The switching device Q4 is disposed between the phase current terminal of the W phase (i.e., the connection point between the anode of the diode D3 and the cathode of the diode D4) and the common anode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are respectively connected to the phase current terminal of the W phase and the common anode of the three-phase rectifier bridge circuit, and the G terminal is used to receive the braking signal of the W phase. Similarly, the switching device Q6 is disposed between the phase current terminal of the V phase (i.e., the connection point between the anode of the diode D5 and the cathode of the diode D6) and the common anode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are respectively connected to the phase current terminal of the V phase and the common anode of the three-phase rectifier bridge circuit, and the G terminal is used to receive the braking signal of the V phase.

[0088] As is known to those skilled in the art, when an NMOS transistor is used as a switching device, when a high-level signal is input, its S terminal and D terminal are conducting, and when a low-level signal is input, its S terminal and D terminal are disconnected. Therefore, the braking signal of the W phase and the braking signal of the V phase in the figure are high-level signals that make the corresponding NMOS transistors conduct. In some alternative embodiments, a continuous high-level signal can be used to continuously conduct the switching devices Q4 and Q6, that is, the braking signal is a continuous level signal. Or, in some other alternative embodiments, the braking signal can also be an alternating level signal. For example, an alternating level signal with a variable frequency (frequency modulation signal) or a pulse width modulation signal (PWM signal) with a fixed frequency and a variable duty cycle is used to construct the braking signal, which can achieve precise control of the braking force. Obviously, when the switching devices Q4 and Q6 are alternating level signals, they will conduct during the high-level time period.

[0089] In addition to using NMOS transistors as switching devices, PMOS transistors, triodes, and other devices can also be used as switching devices for Figure 5A the switching device Q4 and the switching device Q6 in it. Obviously, at this time, it is only necessary to determine the level of the corresponding braking signal according to its conduction characteristics.

[0090] The working process of the self-powered braking unit provided in this embodiment is introduced below.

[0091] (I) At time t1

[0092] As Figure 5B shown, at time t1, the phase voltage of the U phase is the largest, the phase voltages of the W phase and the V phase are both less than zero and the phase voltage of the V phase is the smallest. At this time, in the three-phase rectifier bridge circuit, the current flows from the U-phase coil through the phase current terminal of the U phase, the diode D1, the common cathode, the load, the common anode, and finally returns to the V-phase coil through the phase current terminal of the V phase, thereby completing the power supply to the load.

[0093] It should be noted that, in this embodiment, since no switching device is provided in the U phase, within the 120° range where the U-phase voltage is the highest, there is always current flowing through the common cathode, through the load, and reaching the common anode. In this application, the current passing through the common cathode and the common anode is hereinafter referred to as the supply current, that is, the current represented by the green line in the figure. When the load connected between the common cathode and the common anode is a control unit, the power consumption and current it consumes are extremely small, so the braking force generated on the rotor part can be ignored, or it can be considered that it does not brake the rotor part.

[0094] (II) Time t2

[0095] As Figure 5C shown, at time t2, the phase voltage of the U phase is still the maximum, the phase voltage of the W phase enters the positive half cycle, and the phase voltages of the V phase are all less than zero and still the minimum. At this time, when the switching device Q4 does not receive the braking signal, it remains in the off state. At this time, similar to Figure 5C , in the three-phase rectifier bridge circuit, the current flows from the U-phase coil, successively through the phase current terminal of the U phase, diode D1, common cathode, load, common anode, and finally back to the V-phase coil through the phase current terminal of the V phase, thus completing the power supply to the load.

[0096] As Figure 5D shown, if the switching device Q4 receives the W-phase braking signal at this time, causing conduction between the W-phase current terminal and the ground terminal, then in addition to the supply current, a very large current that does not pass through the load will appear between the W-phase coil in the positive half cycle and the V-phase coil in the negative half cycle, and further generate a very large braking force on the rotor part, that is, the braking of the rotor part is achieved. In this application, the current that does not pass through the path between the common cathode and the common anode, but directly returns from one-phase coil to another-phase coil is called the braking current.

[0097] (III) Time t3

[0098] Referring to Figure 5E , at this time, the W-phase voltage is the maximum, the V-phase voltage is negative, and the U-phase voltage is negative and the minimum. When the switching device Q4 does not receive the W-phase braking signal, the three-phase rectifier bridge only includes the supply current that successively flows through the current terminal of the W phase, diode D3, common cathode, load, common anode, diode D2, and the current terminal of the U phase.

[0099] As Figure 5F 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 directly returns from the W-phase coil to the U-phase coil, thereby achieving the braking of the rotor part.

[0100] (IV) Time t4

[0101] As Figure 5GAs shown, at this time, the voltage of phase V is the maximum, the voltage of phase W is still in the positive half cycle, the voltage of phase U is negative and the minimum. At this time, the on-off state of the switching device Q6 of phase V will determine whether the three-phase rectifier bridge circuit contains the supply current. Specifically, if the switching device Q6 of phase V does not receive the braking signal of phase V, and the switching device Q4 of phase W also does not receive the braking signal of phase W, then the three-phase rectifier bridge circuit is as follows Figure 5H shown, only contains the supply current.

[0102] Refer to Figure 5H , since the voltage of phase W is still in the positive half cycle at this time, when the switching device Q6 of phase V remains off to supply power to the load, after the switching device Q4 of phase W receives the braking signal of phase W and conducts, a braking current will still be generated in phase W.

[0103] (V) At time t5

[0104] See Figure 5I and Figure 5J , at time t5, the voltage of phase V is the maximum, and phase W is in the negative half cycle and the minimum. At this time, the switching of the supply current or the braking current in the three-phase rectifier bridge is only determined by the on-off state of the switching device of phase V, and the on-off of the switching device Q4 of phase W does not affect the supply current or the braking current in the three-phase rectifier bridge circuit.

[0105] The above has described in detail the actions of supplying power to the load / braking the rotor part formed by the different on-off states of two switching devices in the three-phase rectifier bridge at each moment. Taking phase W as an example, at times t1, t2, and t3, 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, a braking current will be generated when it receives the braking signal of phase W. At the same time, when it is within the 120° range where the phase voltage is the maximum among the three phases, it will supply power to the load when it does not receive the braking signal of phase W; correspondingly, when the voltage at the phase current terminal of phase W is in the negative half cycle, even if it receives the braking signal of phase W, no braking current will be generated, that is, its braking function is shielded in the negative half cycle.

[0106] From the braking control situations in the positive half cycle and the negative half cycle, it can be seen that as Figure 5K shown, when the switching device is set between the phase current terminal of its corresponding phase and the common anode of the three-phase rectifier bridge circuit, a braking current for braking the rotor part can be generated only when the voltage at the phase current terminal of its corresponding phase is positive.

[0107] It should be noted that Figure 5K the phase voltage change situation is only used to schematically illustrate the time period when the switching device can be used for braking. In fact, it can be understood that with the braking actions in the positive half cycle, after each braking ends, the phase voltage will deviate more from the standard sine wave and be closer to 0 compared to before braking.

[0108] Figure 5L It shows the circuit schematic diagram of the self - generating braking part when three groups of coils are connected in a triangular configuration in some embodiments.

[0109] In this embodiment, since no switching device is provided in the U - phase, there is always a current supplying power to the load in the three - phase rectifier bridge circuit within the interval where the U - phase has the maximum phase voltage. By adopting the method of not setting any switching device in at least one phase and setting at least one switching device in at least one phase, the stability and reliability of the electric control braking for the rotor part can be greatly increased, especially when the load that the self - generating braking part outputs electrical energy to supply power to is used to control its own braking.

[0110] The function of providing reliable power supply for the load that controls its own rotational braking can be realized by a self - powered rotating system provided in this application. The self - powered rotating system includes:

[0111] (1) A control unit;

[0112] (2) A stator part, including three groups of coils arranged at intervals along the circumferential direction;

[0113] (3) A rotor part, which is arranged to be rotatable coaxially relative to the stator part, including several magnets arranged at intervals along the circumferential direction and with alternating polarities;

[0114] (4) A self - generating braking part, which supplies power to the control unit based on the rotation of the rotor part relative to the stator part, and brakes the rotor part based on the braking signal received by the control unit. Among them,

[0115] The self - generating braking part 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 groups of coils;

[0116] 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 enabling end of the switching device is connected to the braking - signal output end of the control unit, and conducts the phase - current terminal of its own phase and the common anode or common cathode of the three - phase rectifier bridge circuit when receiving the braking signal sent by the control unit.

[0117] For the structures, implementation manners of the above - mentioned (2) stator part and (3) rotor part and their cooperation relationships with the wire cup, reference can be made to the previous description. Hereinafter, through Figures 5A to 5J Each figure, it can be seen that the control unit can be arranged between the common cathode and the common anode, that is, the control unit is used as a load, and the self - generating braking part supplies power to it by using the rotation of the wire cup. Then, the load (i.e., the control unit) generates a braking signal for braking the rotor part, thereby realizing the self - powered electric - control braking function.

[0118] In some embodiments, the above control unit serves as a load and includes an MCU module, which is configured to obtain the rotational speed of the rotor part relative to the stator part and generate a braking signal for controlling the braking of the rotor part based on the rotational speed. Techniques for detecting or sampling the rotational speed to determine information such as the speed and acceleration of the rotor part are already known to those skilled in the art and will not be elaborated here.

[0119] In some embodiments, the above control unit, as a load, further includes a power storage module. It should be noted that in the embodiments of the present application, the power storage module is provided for the control unit, and its function is not to continuously supply power to power-consuming functional modules such as the MCU in the control unit during a long-term non-use state. Instead, after the rotor part rotates to generate electricity, it temporarily stores the electric energy generated when the three-phase rectifier bridge circuit is in a power generation state and supplies power to power-consuming functional modules such as the MCU in the control unit when it is in a non-power generation state, so that the MCU will not lose power due to the supply current not flowing through the MCU during the process of controlling the braking.

[0120] Obviously, in the solution of the present application, since there is at least one phase without a switching device, there will be a supply current for at least 1 / 3 of a cycle during one rotation of the rotor part. The electric energy stored in the power storage module only needs to be able to supply power to the MCU within the time of 2 / 3 rotation of the rotor part. Therefore, its capacity and size can be set to be extremely small to meet the requirements of product miniaturization and integration.

[0121] For example, in some preferred embodiments, a supercapacitor can be selected as the power storage module, with its capacity not exceeding 1 F and its maximum size not exceeding 5 cm; further, when using a low-power MCU with a supply voltage of 3.3 V, the capacity of the supercapacitor can not exceed 0.22 F, the diameter can not exceed 7 mm, and the height can not exceed 2 mm.

[0122] Embodiment 2:

[0123] This embodiment provides a self-powered rotating system, which includes a control unit, a stator part, a rotor part, and a self-powered braking part, where the stator part, the rotor part, and the self-powered braking part can be implemented in any of the ways described above.

[0124] Figure 6A Shows the architecture of the control unit and the self-powered braking part in this embodiment. As Figure 6A shown, the control unit is arranged between the common cathode and the 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 part.

[0125] Furthermore, as Figure 6AAs shown, the braking signals for the switching device Q4 of the W phase and the switching device Q6 of the V phase 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 for the braking signal of the W phase and the braking signal of the V phase. By outputting a PWM signal with alternating high and low levels, the on and off states of the switching devices Q4 and Q6 are controlled to achieve braking control.

[0126] As analyzed above, when using Figure 6A the self-powered braking control shown, additionally setting a power supply circuit for one phase without any switching devices is particularly beneficial to ensuring the reliability and stability of braking control. This is because without specifically setting a long-term power supply module, there is a certain probability that the control unit will be powered off after the online cup and other components have been idle for a period of time. At this time, the I / O ports used to output control signals may be in a "floating" state. Although adding pull-up / pull-down resistors and other structures can keep their potentials in a preset state, this will inevitably increase the complexity of the circuit structure. Therefore, adopting the solution in this application can simplify the circuit structure while additionally achieving the effect of ensuring that the control unit will surely start and enter the working state due to the rotation of the rotor part.

[0127] Figure 6B shows the specific circuit diagram of the control unit in this embodiment. It should be noted that Figure 6B the specific circuit shown does not limit this application. Those skilled in the art can add, replace, etc. the modules and components in the above circuit without departing from the idea of the technical solution of this application to achieve specific index requirements.

[0128] Embodiment 3:

[0129] This embodiment provides a brakeable rotating device with a power generation function.

[0130] Figure 7A shows the circuit schematic diagram of the self-powered braking part in this embodiment. Through Figure 7A it can be seen that this embodiment also sets two switching devices as in Embodiment 1. The difference between the two is that in this embodiment, the switching devices of the W phase and the V phase are respectively arranged between the current end of their respective phases and the common cathode of the three-phase rectifier circuit.

[0131] Specifically, both the switching devices Q3 and Q5 are PMOS transistors. Among them, the switching device Q3 is arranged between the phase current terminal of the W phase (i.e., the connection point between the anode of the diode D3 and the cathode of the diode D4) and the common cathode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are respectively connected to the phase current terminal of the W phase and the common cathode of the three-phase rectifier bridge circuit, and the G terminal is used to receive the braking signal of the W phase; similarly, the switching device Q5 is arranged between the phase current terminal of the V phase (i.e., the connection point between the anode of the diode D5 and the cathode of the diode D6) and the common cathode of the three-phase rectifier bridge circuit. Its D terminal and S terminal are respectively connected to the phase current terminal of the V phase and the common cathode of the three-phase rectifier bridge circuit, and the G terminal is used to receive the braking signal of the V phase.

[0132] Figure 7B Taking the W phase as an example, a distribution schematic diagram of the brakeable period of the W phase is shown, and the analysis of Figures 5B to 5J can be referred to for analyzing the braking control actions of the switching devices arranged in the upper half-bridge. Combining Figure 7B it can be known that when the switching device is arranged between the phase current terminal of its corresponding phase and the common cathode of the three-phase rectifier bridge circuit, only when the voltage of the phase current terminal of its corresponding phase is negative, can a braking current for braking the rotor part be generated.

[0133] Embodiment 4:

[0134] This embodiment provides a brakeable rotating device with a power generation function.

[0135] Figure 8 The circuit schematic diagram of the self-power generation braking part in this embodiment is shown. Through Figure 8 it can be seen that two switching devices Q5 and Q6 can also be arranged in the upper and lower half-bridge structures of the same phase. It can be understood that when only one phase is provided with switching devices, the proportion of the power supply period will increase.

[0136] In addition to the above-mentioned multiple embodiments of two switching devices, the number of switching devices can also be changed. For example, Figure 9A , Figure 9B and Figure 9C respectively show the embodiments of setting one switching device, three switching devices, and four switching devices in the self-power generation braking part. It can be known that by adjusting the number of switching devices, the number of phases without switching devices (corresponding to ensuring the proportion of the interval for supplying power to the load) and the braking control fineness in the phases with switching devices (corresponding to braking in the positive half-cycle and / or braking in the negative half-cycle) can be changed simultaneously.

[0137] Some embodiments of the present application provide a spool, which includes a cylindrical spool body and the aforementioned brakeable rotating device with power generation function. Among them, the spool body is fixedly connected to the rotor part, and the specific fixed connection method has been introduced in detail above and will not be elaborated here.

[0138] Some embodiments of the present application provide an electronically controlled spool, which includes a cylindrical spool body and the aforementioned self-powered rotating system. Among them, the spool body is fixedly connected to the rotor part, and the specific fixed connection method has been introduced in detail above and will not be elaborated here.

[0139] Some embodiments of the present application provide a control method for controlling the aforementioned self-powered rotating system, such as Figure 10 shown, this method includes the following operations:

[0140] Step 210, maintaining the operation of the control unit based on the rotation of the rotor part relative to the stator part;

[0141] Step 220, obtaining the rotational speed of the rotor part relative to the stator part;

[0142] Step 230, outputting the brake signal based on the rotational speed.

[0143] Obviously, the above steps can be continuously carried out during the rotation of the rotor part relative to the stator part until the rotor part stops rotating.

[0144] Figure 10 The control method shown can be used for the self-powered brake control of a unidirectional rotating structure. When the structure to be controlled can rotate bidirectionally (such as the spool of a fishing reel can wind and unwind the fishing line), the rotation direction needs to be considered. For this reason, some other embodiments of the present application provide a control method for a self-powered rotating system, such as Figure 11 shown, this method includes the following operations:

[0145] Step 310, maintaining the operation of the control unit based on the rotation of the rotor part relative to the stator part;

[0146] Step 320, obtaining the rotational speed and rotation direction of the rotor part relative to the stator part;

[0147] Step 330, outputting the brake signal based on the rotational speed and rotation direction.

[0148] The judgment of the rotational speed and rotation direction can be achieved by various methods known to those skilled in the art. For example, an optoelectronic sensor can be used to detect the rotational speed and rotation direction of the spool, or the rotational speed and rotation direction can be judged by the frequency and sequence of the alternating change of the three-phase voltages U, W, and V.

[0149] The specific implementation manners of the present application have been described in detail above. For those skilled in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A brakeable rotating device with power generation function, comprising: The stator part includes three groups of coils arranged at intervals in the circumferential direction; The rotor part is arranged to be coaxially rotatable relative to the stator part, and includes a plurality of magnets arranged at intervals along the circumference and with alternating polarities; It is characterized in that it also includes a self-generating brake unit, which generates electricity based on the rotation of the rotor unit relative to the stator unit and performs brake control on the rotor unit based on a received brake signal, wherein: The self-generating brake unit comprises a three-phase rectifier bridge circuit, and the three phase current ends of the three-phase rectifier bridge circuit are respectively connected to the three groups of coils; The three-phase rectifier bridge circuit has at least one phase with a switching device and at least one phase without a switching device. When receiving a brake signal, the enable end of the switching device conducts the phase current end of the phase to the common anode or common cathode of the three-phase rectifier bridge circuit.

2. The brakeable rotating device with power generation function according to claim 1, characterized in that: The switch device is arranged between the phase current terminal of the phase in which it is located and the common anode of the three-phase rectifier bridge circuit, or the switch device is arranged between the phase current terminal of the phase in which it is located and the common cathode of the three-phase rectifier bridge circuit.

3. The brakeable rotating device with power generation function according to claim 2, characterized in that: When the switch device is arranged between the phase current terminal of the phase in which it is located and the common anode of the three-phase rectifier bridge circuit, a braking current for braking the rotor part can be generated only when the voltage at the phase current terminal of the phase in which it is located is positive; When the switching device is arranged between the phase current terminal of the phase in which it is located and the common cathode of the three-phase rectifier bridge circuit, a braking current for braking the rotor part can be generated only when the voltage at the phase current terminal of the phase in which it is located is negative.

4. The brakeable rotating device with power generation function according to claim 3, characterized in that: The braking current does not pass through the current path between the common cathode and the common anode of the three-phase rectifier bridge circuit.

5. The brakeable rotating device with power generation function according to claim 2, characterized in that: The number of the switch devices is two, and the two switch devices are arranged in different phases of the three-phase rectifier bridge circuit.

6. The brakeable rotating device with 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 to which they belong 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 to which they belong and the common cathode of the three-phase rectifier bridge circuit, or, One of the two switching devices is arranged between the phase current end of its phase and the common anode of the three-phase rectifier bridge circuit, and the other switching device is arranged between the phase current end of its phase and the common cathode of the three-phase rectifier bridge circuit.

7. The brakeable rotating device with power generation function according to claim 2, characterized in that: The number of the switching devices is two, and 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 terminal of its phase and the common anode of the three-phase rectifier bridge circuit, and the other switching device is arranged between the phase current terminal of its phase and the common cathode of the three-phase rectifier bridge circuit.

8. The brakeable rotating device with power generation function according to claim 2, characterized in that: The number of the switch devices is three or four.

9. The brakeable rotating device with power generation function according to claim 1, characterized in that: The switch 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 that turns on the switch device.

10. The brakeable rotating device with power generation function according to claim 1, characterized in that: A load is connected between the common cathode and the common anode of the three-phase rectifier bridge circuit.

11. The brakeable rotating device with power generation function according to claim 10, characterized in that: The load is powered by the self-generating brake unit and generates a brake signal for performing brake control on the rotor unit.

12. The brakeable rotating device with power generation function according to claim 11, characterized in that: The load includes an MCU module, which is used to obtain a rotation speed of the rotor part relative to the stator part, and generate a brake signal for performing brake control on the rotor part based on the rotation speed.

13. The brakeable rotating device with power generation function according to claim 10, 11 or 12, characterized in that: The load also includes a power storage module for temporarily storing the electric energy generated when the three-phase rectifier bridge circuit is in a power generation state.

14. The brakeable rotating device with power generation function according to claim 1, characterized in that: The three groups of coils are connected in star connection or in delta connection.

15. A wire cup, comprising a cylindrical cup body, characterized in that: It also includes the brakeable rotating device with power generation function as claimed in claim 1, wherein: The cup body is fixedly connected to the rotor part.

16. A self-powered rotating system, characterized in that: include: Control unit; The stator part includes three groups of coils arranged at intervals in the circumferential direction; The rotor part is arranged to be coaxially rotatable relative to the stator part, and includes a plurality of magnets arranged at intervals along the circumference and with alternating polarities; It is characterized in that it also includes a self-generating brake unit, which supplies power to the control unit based on the rotation of the rotor unit relative to the stator unit, and performs brake control on the rotor unit based on a brake signal received from the control unit, wherein: The self-generating brake unit comprises a three-phase rectifier bridge circuit, and the three phase current ends of the three-phase rectifier bridge circuit are respectively connected to the three groups of coils; The three-phase rectifier bridge circuit has at least one phase with a switching device and at least one phase without a switching device. The enable end of the switching device is connected to the brake signal output end of the control unit, and when the brake signal sent by the control unit is received, the phase current end of the phase is connected to the common anode or common cathode of the three-phase rectifier bridge circuit.

17. An electric control wire cup, comprising a cylindrical cup body, characterized in that: Also includes the self-powered rotation system of claim 16; wherein, The cup body is fixedly connected to the rotor part.

18. A control method for controlling the self-powered rotating system according to claim 16, characterized in that: The following operations are included: maintaining operation of the control unit based on rotation of the rotor portion relative to the stator portion; obtaining a rotational speed of the rotor portion relative to the stator portion, and The brake signal is output based on the rotational speed.

19. A control method for controlling the self-powered rotating system according to claim 16, characterized in that: The following operations are included: maintaining operation of the control unit based on rotation of the rotor portion relative to the stator portion; obtaining the rotation speed and rotation direction of the rotor portion relative to the stator portion, and, The brake signal is output based on the rotation speed and the rotation direction.

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