Split type current sensor and motor controller

Abstract

The utility model discloses a split type current sensor and a motor controller, and relates to the technical field of motor control, the split type current sensor and the motor controller comprise an inverter driving board, the bottom of the inverter driving board is welded with Hall elements in a rectangular array mode, the bottom of the inverter driving board is provided with a sensor main body, and the sensor main body is connected with the Hall elements. A locking screw is fixedly connected between the inverter driving plate and the split type current sensor; wherein the sensor main body is provided with a sensor framework, silicon steel magnetic rings are fixedly connected in the sensor framework in a rectangular array manner, and a C-shaped gap for placing a Hall element is formed above each silicon steel magnetic ring; according to the utility model, the sensor framework is fixed at the bottom of the inverter driving board by using the locking screw, and the Hall element can be accurately placed in the C-shaped gap above the silicon steel magnetic ring, so that the accuracy of magnetic field detection is greatly improved, and the precision of current measurement is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor control technical field, specifically a kind of split current sensor and motor controller. BACKGROUND

[0002] With the continuous development of new energy vehicles, motor controller is indispensable on new energy vehicles, and motor controller is the control center of electric vehicle braking system, responsible for converting the direct current of battery into the alternating current required by motor, and controlling the speed, torque and other performances of motor by adjusting voltage, current and other parameters, so as to realize accurate control of vehicle driving state.

[0003] The current sensor in the traditional motor controller usually adopts the mode of injection molding of acquisition board containing Hall element and silicon steel magnetic ring to detect current change.

[0004] However, in practice, this scheme not only increases the manufacturing complexity in the manufacturing process, but also easily causes the measurement accuracy to decrease due to poor positioning of Hall element in the use process, in addition, the single installation mode also reduces the diversity of motor controller structure arrangement. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of split current sensor and motor controller, Hall element and silicon steel magnetic ring are arranged separately, wherein silicon steel magnetic ring is wrapped in sensor skeleton by injection molding process combined with special fixture, and Hall element is connected on inverter drive board by welding, and finally positioned by positioning pin hole and positioning pin column, to ensure that Hall element can be accurately placed in the C-shaped gap of silicon steel magnetic ring, greatly improve the accuracy of magnetic field detection, thereby improving the accuracy of current measurement. To solve the technical problems proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A kind of motor controller, including controller main body, the end of controller main body is equipped with control panel, and the other end of control panel is provided with installation recess, and the both sides of installation recess are provided with fixed threaded rod fixedly connected with controller main body;

[0008] The fixed threaded rod is movably connected with quick locker at the end away from controller main body, and current detection mechanism is arranged between quick locker and installation recess, wherein quick locker includes positioning pressure rod, the both ends of positioning pressure rod are provided with through hole corresponding to fixed threaded rod, and internally threaded locking knob is inserted and matched in through hole, and the end of internally threaded locking knob penetrates through hole and is screwed with fixed threaded rod;

[0009] The current detection mechanism comprises a sensor shell placed in the mounting groove, and a split current sensor is mounted in the sensor shell.

[0010] As a further technical scheme of the utility model, the sensor shell is embedded with a live copper sheet in a rectangular array at one end away from the positioning press rod, the inner side of the mounting groove is fixedly connected with a contact copper sheet corresponding to the live copper sheet, and the side surface of the live copper sheet is closely attached to the side surface of the contact copper sheet.

[0011] As a further technical scheme of the utility model, the mounting groove is further provided with a spacing plate integrally arranged with the controller body, and the contact copper sheet and the spacing plate are arranged at a distance from each other.

[0012] A split current sensor comprises an inverter drive board, a Hall element is welded on the bottom of the inverter drive board in a rectangular array, a sensor body is arranged on the bottom of the inverter drive board, and a locking screw is fixedly connected between the inverter drive board and the split current sensor.

[0013] The sensor body has a sensor skeleton, silicon steel magnetic rings are fixedly connected to the sensor skeleton in a rectangular array, and a C-shaped gap for placing the Hall element is formed above each silicon steel magnetic ring.

[0014] As a further technical scheme of the utility model, the sensor skeleton is symmetrically provided with a positioning pin column, the positioning pin column is integrally arranged with the sensor skeleton, and the inverter drive board is provided with a positioning pin hole corresponding to the positioning pin column.

[0015] As a further technical scheme of the utility model, the positioning pin hole at the top end of the sensor skeleton is in plug-in cooperation with the positioning pin hole in the inverter drive board, and the Hall element welded below the inverter drive board is located in the C-shaped gap above the silicon steel magnetic ring.

[0016] As a further technical scheme of the utility model, the sensor skeleton is integrally provided with a threaded fixing column, an internal thread hole is formed in the threaded fixing column, and the end of the locking screw is in threaded cooperation with the internal thread hole in the threaded fixing column after penetrating through the inverter drive board.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The utility model discloses, install, the positioning pin post on the sensor skeleton is inserted to the positioning pin hole corresponding setting on inverter drive board, then utilizes locking screw and fixes sensor skeleton to the bottom of inverter drive board, the installation position of split type current sensor is positioned fast to the sensor skeleton, can guarantee that hall element is placed in the C -shaped gap above silicon steel magnetic ring accurately simultaneously, greatly improves the accuracy of magnetic field detection, thereby the precision of current measurement is improved.

[0019] The utility model discloses, due to the split type design of hall element and silicon steel magnetic ring, the sensor skeleton is convenient for dismantling at any time, and the hall element is directly welded on inverter drive board, therefore, when the sensor skeleton is dismantled, the pin of hall element is not influenced, compared with this design of integral type, can better protect hall element, and also improve the dismounting efficiency.

[0020] The utility model discloses, when making, adopt injection molding process to combine specially-made fixture and firmly fix silicon steel magnetic ring in sensor skeleton, make silicon steel magnetic ring present rectangular array type and embed in sensor skeleton, this design not only strengthens the stability of overall structure, but also reduces the position deviation due to external environmental factor (such as vibration), guarantees the reliability of long -term use.

[0021] The utility model discloses, rotates inner thread locking knob, through the thread cooperation between inner thread locking knob and fixed threaded rod, makes inner thread locking knob and push positioning pressure rod to the extrusion of current detection mechanism, makes the electrification copper sheet of current detection mechanism side and contact copper sheet stick together, contrarily, the sensor shell is convenient for worker to dismantle fast, saves the dismounting time. ACCURATELY

[0022] Figure 1 It is the split structure schematic view of current detection mechanism in the utility model.

[0023] Figure 2 It is the sectional view of the utility model. Figure 1

[0024] Figure 3 It is the three-dimensional structure schematic view of controller main part in the utility model.

[0025] Figure 4 It is the bottom structure schematic view of the utility model. Figure 3

[0026] Figure 5 It is the partial structure schematic view of the utility model. Figure 4

[0027] It is the local enlarged schematic view of the utility model. Figure 6 Figure 5 It is the local enlarged schematic view of the utility model.​​​

[0028] Figure 7 It is the three-dimensional structure schematic view of the current detection mechanism in the utility model.

[0029] In the figure,

[0030] Inverter drive board-1, locking screw-2, Hall element-3, positioning pin hole-4, sensor skeleton-5, silicon steel magnetic ring-6, positioning pin column-7, integrated sensor module-8, controller main body-9, control panel-10, installation groove-11, quick locker-12, positioning pressure rod-121, internal thread locking knob-122, current detection mechanism-13, sensor shell-131, incoming line hole-132, copper piece-133, fixed threaded rod-14, contact copper piece-15, spacer plate-16. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] Please refer to Figures 1-7 The utility model embodiment provides a kind of motor controller, comprising

[0033] The end of controller main body 9 is equipped with control panel 10, and the other end of control panel 10 is equipped with installation groove 11, and the both sides of installation groove 11 are equipped with fixed threaded rod 14 fixedly connected with controller main body 9;

[0034] The end of fixed threaded rod 14 away from controller main body 9 is movably connected with quick locker 12, and current detection mechanism 13 is arranged between quick locker 12 and installation groove 11, wherein quick locker 12 includes positioning pressure rod 121, the both ends of positioning pressure rod 121 are equipped with the through hole corresponding with fixed threaded rod 14, and internal thread locking knob 122 is inserted into the through hole, and the end of internal thread locking knob 122 is screwed with fixed threaded rod 14 through the through hole;

[0035] The current detection mechanism 13 includes the sensor shell 131 placed in the installation groove 11, and the split type current sensor is installed in the sensor shell 131.

[0036] By adopting the technical scheme, the inner thread locking knob 122 is rotated, the inner thread locking knob 122 and the fixed threaded rod 14 are threadedly matched, the inner thread locking knob 122 pushes the positioning pressing rod 121 to extrude the current detection mechanism 13, the electrified copper sheet 133 on the side of the current detection mechanism 13 is attached to the contact copper sheet 1, and vice versa, so that the worker can quickly disassemble the sensor shell 131, and the disassembly time is saved.

[0037] In the embodiment, the sensor shell 131 is embedded with the electrified copper sheet 133 in a rectangular array at one end away from the positioning pressing rod 121, the inner side of the mounting groove 11 is fixedly connected with the contact copper sheet 15 corresponding to the electrified copper sheet 133, and the side surface of the electrified copper sheet 133 is tightly attached to the side surface of the contact copper sheet 15.

[0038] Further, the mounting groove 11 is also provided with the spacing plate 16 integrally arranged with the controller body 9, and the contact copper sheet 15 and the spacing plate 16 are arranged at intervals.

[0039] The utility model discloses a split type current sensor Embodiment

[0040] Including inverter drive board 1, inverter drive board 1 bottom is welded with hall element 3 in rectangular array, inverter drive board 1 bottom is equipped with sensor body, and inverter drive board 1 and split type current sensor between fixedly connected with locking screw 2;

[0041] Among them, sensor body has sensor skeleton 5, and silicon steel magnetic ring 6 is fixedly connected in rectangular array in sensor skeleton 5, and C-shaped gap of placing hall element 3 is formed above each silicon steel magnetic ring 6.

[0042] In the embodiment, the sensor skeleton 5 is symmetrically provided with the positioning pin column 7, and the positioning pin column 7 is integrally arranged with the sensor skeleton 5, and the inverter drive board 1 is provided with the positioning pin hole 4 corresponding to the positioning pin column 7.

[0043] By adopting the technical scheme, during installation, the positioning pin column 7 on the sensor skeleton 5 is inserted into the positioning pin hole 4 arranged correspondingly on the inverter drive board 1, and then the sensor skeleton 5 is fixed to the bottom of the inverter drive board 1 by using the locking screw 2, so that the installation position of the split type current sensor can be quickly positioned, and at the same time, it is ensured that the hall element 3 can be accurately placed in the C-shaped gap above the silicon steel magnetic ring 6, thereby greatly improving the accuracy of magnetic field detection and the precision of current measurement.

[0044] Further, the positioning pin hole 4 at the top end of the sensor skeleton 5 is inserted into the positioning pin hole 4 in the inverter drive board 1, and the Hall element 3 welded below the inverter drive board 1 is located in the C-shaped gap above the silicon steel magnetic ring 6.

[0045] Further, the sensor skeleton 5 is integrally provided with a threaded fixing column, an internal threaded hole is formed in the threaded fixing column, and the end of the locking screw 2 is screwed into the internal threaded hole in the threaded fixing column through the inverter drive board 1.

[0046] By adopting the above technical scheme, since the Hall element 3 and the silicon steel magnetic ring 6 are designed in a split type, the sensor skeleton 5 can be disassembled at any time, and since the Hall element 3 is directly welded on the inverter drive board 1, the disassembly of the sensor skeleton 5 will not affect the pins of the Hall element 3. Compared with the integrated design, the Hall element 3 can be better protected, and the disassembly efficiency is improved.

[0047] In particular, the inverter drive board 1 and the sensor skeleton 5 are arranged on the inner side of the sensor shell 131, and the inverter drive board 1 is fixedly connected to the inner side of the sensor shell 131 by bolts. Embodiment

[0048] The inverter drive board 1 is provided with an integrated sensor module 8, and the integrated sensor module 8 is embedded with a Hall element 3 and a silicon steel magnetic ring 6, wherein the Hall element 3 is located above the integrated sensor module 8.

[0049] The end of the Hall element 3 away from the integrated sensor module 8 extends through the inverter drive board 1 to above the inverter drive board 1, and the extended part is welded to the inverter drive board 1.

[0050] In this embodiment, the integrated sensor module 8 is fixedly connected with a positioning pin column 7 corresponding to the positioning pin hole 4, and the positioning pin column 7 is located on both sides of the Hall element 3, and the positioning pin column 7 is clamped in the positioning pin hole 4 on the inverter drive board 1.

[0051] By adopting the above technical scheme, the Hall element 3, the silicon steel core 6 and other components are integrated in a compact integrated sensor module 8, reducing the installation complexity. Since an integrated design is adopted, errors that may occur during assembly are reduced, improving the reliability of the overall system. Large-scale production can reduce unit cost, but customization flexibility is low.

[0052] The working principle of the utility model is: in use, first, the positioning pin 7 on the sensor framework 5 is inserted into the positioning pin hole 4 on the inverter drive board 1, the relative position between the sensor framework 5 and the inverter drive board 1 is positioned through the mutual cooperation of the positioning pin hole 4 and the positioning pin 7, the Hall element 3 at the bottom of the inverter drive board 1 is accurately inserted into the C-shaped gap on the silicon steel magnetic ring 6, then the inverter drive board 1 and the sensor framework 5 are fixedly connected by the locking screw 2; then the split current sensor is fixed into the sensor shell 131, the wires led out of the controller main body 9 are inserted into the inside of the sensor shell 131 through the wire inlet hole 132, and the wires pass through the inside of the silicon steel magnetic ring 6, finally, the end of the wire is led out from the bottom of the sensor shell 131, then the current detection mechanism 13 is inserted into the mounting groove 11 at the end of the controller main body 9, then the inner thread locking knob 122 is rotated, the inner thread locking knob 122 pushes the positioning pressure rod 121 to the current detection mechanism 13 through the thread cooperation between the inner thread locking knob 122 and the fixed threaded rod 14, the current detection mechanism 13 is contacted with the contact copper sheet 15 through the extrusion force, the current is detected by the split current sensor, finally, the detected signal is fed back to the controller main body 9 through the electrified copper sheet 133 and the contact copper sheet 15; the structure is simple, the operation is very convenient, and the labor intensity is effectively reduced.

[0053] It is apparent for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the utility model. Any figure mark in the claims should not be regarded as limiting the involved claims.

[0054] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A split current sensor, characterized in that: The application relates to an inverter drive board (1), the bottom of the inverter drive board (1) is welded with Hall elements (3) in a rectangular array, the bottom of the inverter drive board (1) is provided with a sensor main body, and locking screws (2) are fixedly connected between the inverter drive board (1) and the split current sensor. The sensor main body is provided with a sensor framework (5), silicon steel magnetic rings (6) are fixedly connected in the sensor framework (5) in a rectangular array, and C-shaped gaps for placing the Hall elements (3) are formed above each silicon steel magnetic ring (6).

2. The split current sensor of claim 1, wherein: Positioning pin columns (7) are symmetrically arranged on the sensor framework (5) and integrally arranged with the sensor framework (5), and positioning pin holes (4) corresponding to the positioning pin columns (7) are formed in the inverter drive board (1).

3. The split current sensor of claim 2, wherein: The positioning pin holes (4) at the top of the sensor framework (5) are inserted into the positioning pin holes (4) in the inverter drive board (1), and the Hall elements (3) welded below the inverter drive board (1) are located in the C-shaped gaps above the silicon steel magnetic rings (6).

4. The split current sensor of claim 3, wherein: The sensor framework (5) is integrally provided with a threaded fixing column, an internal thread hole is formed in the threaded fixing column, and the end of the locking screw (2) penetrates through the inverter drive board (1) and is screwed into the internal thread hole of the threaded fixing column.

5. A motor controller employing a split current sensor, characterized by, The application further relates to a controller, the controller comprises a controller main body (9), a control panel (10) is arranged at the end of the controller main body (9), an installation recess (11) is formed at the other end of the control panel (10), and fixed threaded rods (14) are fixedly connected with the controller main body (9) on both sides of the installation recess (11). A quick locker (12) is movably connected to the end of the fixed threaded rod (14) away from the controller main body (9), a current detection mechanism (13) is arranged between the quick locker (12) and the installation recess (11), the quick locker (12) comprises a positioning pressing rod (121), through holes corresponding to the fixed threaded rods (14) are formed at the two ends of the positioning pressing rod (121), internal thread locking knobs (122) are inserted into the through holes, and the ends of the internal thread locking knobs (122) penetrate through the through holes and are screwed into the fixed threaded rods (14). The current detection mechanism (13) comprises a sensor shell (131) arranged in the installation recess (11), and the split current sensor is arranged in the sensor shell (131).

6. The motor controller of claim 5, wherein: A through copper sheet (133) is embedded in the sensor shell (131) away from the positioning pressing rod (121) in a rectangular array, contact copper sheets (15) corresponding to the through copper sheet (133) are fixedly connected to the inner side of the installation recess (11), and the side surface of the through copper sheet (133) is tightly attached to the side surface of the contact copper sheet (15).

7. The motor controller of claim 6, wherein: The installation recess (11) is further provided with a spacing plate (16) integrally arranged with the controller main body (9), and the contact copper sheet (15) and the spacing plate (16) are arranged at intervals.

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