CN218335805U - Motor controller - Google Patents

Abstract

The utility model discloses a motor controller, include: a mounting box and a circuit board assembly and a heat sink adapted to fit within the mounting box; the circuit board assembly comprises a high-voltage circuit board and a low-voltage circuit board which are stacked in an insulating mode; the mounting box is provided with a heat dissipation window; the radiator is matched and connected with the radiating window so that radiating fins of the radiator extend out of the mounting box. The utility model discloses can compromise reduction in production cost and improve the radiating effect.

Description

Motor controller

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor controller.

Background

The control of the operating state of the motor is usually implemented by a controller, for example, a motor applied in an electric vehicle, and the control of the output torque of the motor is not independent of the motor controller. For a motor controller, in order to ensure the stability of circuit signals, a single-layer board conventionally used in the prior art mostly keeps a control module away from a power module in the design to ensure the working stability of the single-layer board, and the structure can cause the controller to occupy a large space, and cannot be applied to the condition of limited partial space.

In addition, be provided with the circuit in the motor controller, at the during operation, the electronic component in the circuit can produce the heat because of the loss of power to make the temperature rise in the single-stage controller, if can not in time transmit the heat, then probably damage motor controller, influence its holistic life. To this, in order to guarantee the radiating stability of motor controller, the high-power motor controller of high pressure that adopts usually among the prior art is the full aluminium sealed mounting box structure mostly, and the mounting box is made through modes such as machining after tensile aluminium alloy or aluminium die-casting again, and overall material cost is high on the one hand to the mounting box that this kind of material was made, and on the other hand then is radiating effect not ideal. On the basis of meeting the heat dissipation requirement, in order to ensure the necessary electrical insulation safety, the volume of the heat dissipation device is relatively large, so that the product cost is higher, and particularly, the structural design difficulty of the heat dissipation device is higher under the condition of limited installation space.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor controller to the solution is taken into account reduction in production cost and is improved the technical problem of radiating effect.

The utility model discloses a machine controller realizes like this:

a motor controller comprising: a mounting box and a circuit board assembly and a heat sink adapted to fit within the mounting box; wherein

The circuit board assembly comprises a high-voltage circuit board and a low-voltage circuit board which are stacked in an insulating mode; and

the mounting box is provided with a heat dissipation window; the radiator is matched and connected with the radiating window so that the radiating fins of the radiator extend out of the mounting box.

In an alternative embodiment of the present invention, the heat sink is disposed on a side of the high voltage circuit board away from the low voltage circuit board.

In an alternative embodiment of the present invention, a plurality of insulating posts are disposed between the high voltage circuit board and the low voltage circuit board to insulate and overlap the high voltage circuit board and the low voltage circuit board.

The utility model discloses optional embodiment, realize through the contact pin that the electricity of high-voltage line board and low pressure circuit board is connected between high-voltage line board and the low pressure circuit board.

In an alternative embodiment of the present invention, the mounting box has a hollow assembly cavity, and a side end face of the mounting box opposite to the heat dissipation window is formed with an open opening.

In an alternative embodiment of the present invention, the high voltage circuit board is adapted to be fastened to a mounting box; and

and a positioning column for fastening the high-voltage circuit board is formed at the edge of one side of the open opening.

In an alternative embodiment of the present invention, a plurality of wire passing grooves are formed on the side plate of the mounting box and at the edge of the open opening.

In an alternative embodiment of the present invention, the heat sink is in interference fit with the heat dissipation window.

In an optional embodiment of the present invention, the mounting box is integrally injection molded.

In an alternative embodiment of the present invention, a plurality of assembling holes are further provided on the side edge of the mounting box.

By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a machine controller, circuit board subassembly include the high voltage circuit board and the low voltage circuit board that relatively independent set up, can realize machine controller's modular design in order effectively to prevent radiation interference between the two. And high-voltage line board and the insulating superpose of low pressure circuit board can reduce holistic circuit board subassembly to the occupancy in mounting box space in the mounting box to the realization avoids the too big problem of the whole volume of mounting box, so on the one hand can reduce material cost, and on the other hand can improve the utility model discloses a machine controller is to the suitability of the limited environment in partial space.

In addition, the radiator extends the radiating fins of the radiator to the outer side of the mounting box through the radiating window on the mounting box, can be well exposed in the ambient air, ensures good radiating conditions, has little thermal interference on electronic elements on the circuit board assembly, and can ensure the accuracy of control signals and improve the use reliability of the motor controller.

Drawings

Fig. 1 is an exploded schematic view of a motor controller according to the present invention;

fig. 2 is a schematic diagram of the layout structures of the high-voltage circuit board and the low-voltage circuit board of the motor controller and the heat sink of the present invention;

fig. 3 is a schematic structural diagram of a low-voltage circuit board of the motor controller of the present invention;

fig. 4 is a schematic structural diagram of a high-voltage circuit board of the motor controller of the present invention;

fig. 5 is a schematic structural view of the mounting box of the motor controller of the present invention;

fig. 6 is a schematic structural diagram of a heat sink of the motor controller according to the present invention;

fig. 7 is a schematic view of the fitting structure of the heat sink and the mounting box of the motor controller of the present invention.

In the figure: the mounting box comprises a mounting box 1, a heat dissipation window 11, a heat radiator 2, a heat dissipation fin 21, a high-voltage circuit board 31, a low-voltage circuit board 32, a plastic stud 4, a nail hole 51, a positioning column 52, a power line wire passing groove 61, a Hall line wire passing groove 62, a mounting hole 7, a stud hole 8 and a contact pin 9.

Detailed Description

In order that the present invention may be more clearly understood, the following detailed description is given with reference to the accompanying drawings.

Example 1:

referring to fig. 1 to 7, the present embodiment provides a motor controller, including: a mounting box 1 and a circuit board assembly and heat sink 2 adapted to fit into the mounting box 1.

From the material aspect, the integrative injection moulding of mounting box 1 that this embodiment adopted, namely make holistic mounting box 1 be the plastic case, compare in aluminum alloy's mounting box 1, its is with low costs (do not need secondary operation), light in weight, and its structure can diversified design, can satisfy different assembly requirements, and it is simple to mould the shell shaping. However, the plastic case has poorer heat dissipation performance compared with the aluminum case, so the mounting box 1 adopted in the embodiment is a half-enclosure structure, specifically, the mounting box 1 has a hollow assembly cavity, and an open port is formed on one side end face of the mounting box 1, so that the heat sink 2 and the circuit board assembly can be assembled and fixed with the mounting box 1 through the open port.

On the basis of the above structure, further, a heat radiation window 11 is formed on one side end face of the mounting box 1 opposite to the opening; the heat sink 2 is coupled to the heat dissipation window 11 so that the heat dissipation fins 21 of the heat sink 2 extend to the outside of the mounting box 1, that is, a part of the heat sink 2 is located in the mounting box 1, and a part of the heat sink 2, that is, the heat dissipation fins 21 of the heat sink 2, is located outside the mounting box 1, and such a structure is to optimize the heat dissipation effect of the heat sink 2, so that the heat in the mounting box 1 can be dissipated to the outside of the mounting box 1 through the heat sink 2 quickly. Therefore, the plastic mounting box 1 can have good heat dissipation performance on the basis of low material cost by matching the heat sink 2 with the heat dissipation window 11.

As for the wiring board assembly, the present embodiment employs a wiring board assembly including a high-voltage wiring board 31 and a low-voltage wiring board 32 which are stacked in an insulating manner; the insulating stacking here specifically means that the high-voltage circuit board 31 and the low-voltage circuit board 32 are stacked one on top of the other, and the stacked structures of the two are insulated from each other, and specifically, the insulation between the two here can be realized by the following method:

for example, in an optional implementation case, a plurality of insulating columns are arranged between the high-voltage circuit board 31 and the low-voltage circuit board 32 to enable the high-voltage circuit board 31 and the low-voltage circuit board 32 to be overlapped in an insulating manner, the insulating columns may adopt plastic studs 4, and in order to realize the matching of the plastic studs 4 with the high-voltage circuit board 31 and the low-voltage circuit board 32, stud holes 8 for matching the plastic studs 4 are formed in the high-voltage circuit board 31 and the low-voltage circuit board 32. In the embodiment, the plastic studs 4 are arranged, so that the high-voltage circuit board 31 and the low-voltage circuit board 32 are fixed into a whole, a sufficient electrical safety distance is ensured, and a good insulating effect can be achieved.

The high-voltage circuit board 31 and the low-voltage circuit board 32 are stacked in the mounting box 1 in an insulated manner, and here, the reliability of the connection between the two circuit boards can be further improved through a potting process on the basis of the stacking. This kind of structure of insulating superpose can reduce holistic circuit board assembly to the occupancy in mounting box 1 space to the realization avoids the too big problem of the whole volume of mounting box 1, so on the one hand can reduce material cost, and on the other hand can improve the utility model discloses a motor controller is to the suitability of the limited environment in partial space.

More specifically, the components mainly integrated on the low-voltage circuit board 32 in this embodiment include: electronic components such as a half-bridge driving chip and an MCU, and specific electronic components on the low-voltage circuit board 32 may be electronic components that are used in the prior art, and are not modified in this embodiment, and thus detailed structures thereof are not described again. The low-voltage circuit board of this embodiment mainly realizes the function of power conversion circuit, through direct current conversion, filtering, steady voltage etc. to the alternating current, realizes converting the alternating voltage that the electric wire netting changes into the usable stable direct voltage of motor excitation. The high-voltage circuit board 31 mainly realizes the function of controlling the circuit of the motor, and provides exciting current for the motor winding by switching on and off the power circuit elements mainly according to the inter-phase excitation sequence of the motor, and mainly includes heating elements such as power tubes, diodes, driving chips and the like, and here, electronic elements mature in the prior art can be selected as electronic elements on the high-voltage circuit board 31, and no improvement is made to this embodiment, so the specific structure is not described again. On the basis of the structure, the high-voltage circuit board 31 and the low-voltage circuit board 32 of the embodiment are electrically connected through the pin 9, so that the low-voltage control signal of the low-voltage circuit board 32 can electrically control the high-voltage high-power component on the high-voltage circuit board 31.

It should be noted that, in this embodiment, the independent design of the high-voltage circuit board and the low-voltage circuit board is adopted, so that the modular design of the motor controller is realized, for example, for different voltage requirements, only the design of the power conversion circuit, that is, the structure of the low-voltage circuit board, may be adjusted, and the structure of the high-voltage circuit board does not need to be adjusted; if the power of the motor is changed, or the winding structure of the motor, the excitation phase change and the like, the structure of the high-voltage circuit board is adjusted only by adjusting the design of the power circuit, and the design of the low-voltage circuit board is not required to be adjusted.

It should be further described that, regarding the assembly structure between the circuit board assembly and the mounting box 1, in an optional case illustrated in the attached drawings, the high-voltage circuit board 31 and the low-voltage circuit board 32 included in the circuit board assembly are fastened and fitted into a whole through the insulating column, and on this basis, the high-voltage circuit board 31 or the low-voltage circuit board 32 only needs to be assembled with the mounting box 1 to achieve the coupling between the circuit board assembly and the mounting box 1. The drawings of the present embodiment only exemplify a case where the high-voltage circuit board 31 is assembled with the mounting box 1, and for this, a structure of fastening fit is provided between the high-voltage circuit board 31 and the mounting box 1. Under the condition of convenient assembly, the high-voltage circuit board 31 and the mounting box 1 are matched and connected in a screw fastening mode.

More specifically, a nail hole 51 for fitting a screw is prepared in the high-voltage circuit board 31, and a positioning post 52 for fastening the high-voltage circuit board 31 is formed at one side edge of the open opening of the mounting box 1.

In addition, in order to facilitate the lead wires for connecting the electronic components on the high-voltage circuit board 31 and the low-voltage circuit board 32 to extend to the outside of the mounting box 1, a plurality of wire passing grooves are formed on the side plate of the mounting box 1 and at the edge of the open opening. The wire-passing slots at this point at least comprise a power wire-passing slot 61 and a Hall wire-passing slot 62, i.e. at least comprise two wire-passing slots. Two kinds of notch shapes of crossing the wire casing design shape difference prevent the mistake of being qualified for the next round of competitions to lay the notch in electronic component's leading-out terminal adjacent position, make things convenient for the connecting wire to walk the line, it is specific, the power cord crosses the wire casing 61 and the hall line and crosses the degree of depth and the width of wire casing 62 and decide as required installation's lead-out wire thickness, and leave more than or equal to 1.5 mm's surplus, this embodiment is through crossing the wire casing that is equipped with on mounting box 1, can easy to assemble, and prevent that the lead-out wire pine from taking off.

Finally, in order to facilitate the assembly of the motor controller of the present embodiment with an external mating structure, a plurality of assembly holes 7 are further provided on the side edge of the mounting box 1.

Example 2:

on the basis of the motor controller in embodiment 1, the motor controller provided in this embodiment considers that the high-voltage circuit board 31 releases more heat and the temperature rise is faster, so that the high-voltage circuit board 31 is disposed near the heat sink 2, which is more beneficial for the heat sink 2 to dissipate the heat of the high-voltage circuit board 31, and the power components on the circuit board assembly are prevented from rising too fast in a targeted manner.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims (10)

1. A motor controller, comprising: a mounting box and a circuit board assembly and a heat sink adapted to fit within the mounting box; wherein

The circuit board assembly comprises a high-voltage circuit board and a low-voltage circuit board which are stacked in an insulating mode; and

the mounting box is provided with a heat dissipation window; the radiator is matched and connected with the radiating window so that the radiating fins of the radiator extend out of the mounting box.

2. The motor controller of claim 1, wherein the heat sink is disposed on a side of the high voltage circuit board facing away from the low voltage circuit board.

3. The motor controller of claim 1, wherein a plurality of insulating posts are disposed between the high voltage circuit board and the low voltage circuit board to insulate and stack the high voltage circuit board and the low voltage circuit board.

4. The motor controller according to claim 1 or 3, wherein the high voltage circuit board and the low voltage circuit board are electrically connected by a pin.

5. The motor controller according to claim 1, wherein the mounting case has a hollow fitting cavity, and a side end face of the mounting case opposite to the heat dissipation window is formed with an open opening.

6. The motor controller of claim 5 wherein said high voltage circuit board is adapted to be fastened to a mounting box; and

and a positioning column for fastening a high-voltage circuit board is formed at the edge of one side of the open hole.

7. The motor controller according to claim 5 or 6, wherein a plurality of wire passing grooves are formed on the side plate of the mounting box and at the edge of the open opening.

8. The motor controller of claim 1 wherein said heat sink is an interference fit with the heat dissipation window.

9. The motor controller of claim 1, wherein the mounting box is integrally injection molded.

10. The motor controller of claim 1, wherein a plurality of mounting holes are further provided on a side edge of the mounting box.

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