CN219871518U - Current sensor for motor controller - Google Patents

Abstract

The utility model relates to the technical field of heat dissipation of motor controllers, and provides a current sensor for a motor controller, which comprises a sensor shell, wherein the sensor shell comprises a fixing plate, a fixing nut penetrating through the fixing plate is embedded in the fixing plate, the fixing nut is matched with a bolt to fix an output copper bar of a power module of the motor controller with the current sensor, one end, which is not contacted with the output copper bar, of the fixing nut is provided with a heat-conducting insulating pad, and the heat-conducting insulating pad is contacted with the controller shell of the motor controller after the current sensor is installed in the motor controller. The utility model can effectively dissipate the heat of the output copper bar so as to avoid overheat of devices around the output copper bar, and simultaneously assist the heat dissipation of the power module, thereby improving the reliability and the service life of the motor controller.

Description

Current sensor for motor controller

Technical Field

The utility model relates to the technical field of heat dissipation of motor controllers, in particular to a current sensor for a motor controller.

Background

In the new energy automobile, the motor controller can convert two-phase direct current into three-phase alternating current through the power module to supply the motor so as to drive the motor to operate. The output of power module and the input of motor are generally connected through the copper bar, because power module generates heat to and the contact resistance of copper bar overlap joint department leads to self heating, the temperature of copper bar often can be higher, and the heat of copper bar can transmit devices such as current sensor around, influences the reliability and the life-span of device.

Therefore, how to effectively dissipate the heat of the copper bar by more means so as to avoid overheating of devices such as a current sensor and the like, and assist the heat dissipation of the power module of the motor controller becomes a problem to be solved in the present technology.

Disclosure of Invention

The utility model aims to solve the technical problems, and provides a current sensor for a motor controller, which can effectively dissipate heat of an output copper bar so as to avoid overheating of devices around the output copper bar and assist the heat dissipation of a power module, thereby improving the reliability and the service life of the motor controller.

The technical scheme adopted by the utility model is as follows:

the utility model provides a current sensor for motor controller, includes the sensor casing, the sensor casing includes the fixed plate, the fixed plate is embedded to have the fixation nut who link up it, fixation nut through with the bolt matched with, will motor controller's power module's output copper bar with current sensor is fixed mutually, fixation nut with the one end that output copper bar does not contact is provided with the heat conduction insulating pad, the heat conduction insulating pad is in after the current sensor installs in the motor controller, with motor controller's controller casing contacts.

Further, one end of the fixing nut, which is in contact with the output copper bar, is opened, and one end of the fixing nut, which is not in contact with the output copper bar, is closed.

Further, the motor controller comprises three-phase output copper bars, and the fixing plate, the fixing nuts and the heat conduction insulating pad are three groups corresponding to the three-phase output copper bars.

Further, the fixing nut is a copper nut.

Further, the sensor housing is a plastic housing.

Further, the fixing nut and the fixing plate of the sensor shell are of an integral injection molding structure.

Further, the heat-conducting insulating pad is a silica gel pad.

The utility model has the beneficial effects that:

according to the utility model, through the embedded through fixing nut of the fixing plate for fixing the output copper bar, and the heat conducting insulating pad is arranged at one end of the fixing nut, which is not contacted with the output copper bar, the heat of the output copper bar can be effectively dissipated, so that the overheat of devices around the output copper bar is avoided, and meanwhile, the heat dissipation of the power module is assisted, so that the reliability and the service life of the motor controller are improved.

Drawings

FIG. 1 is a schematic diagram of a current sensor for a motor controller according to one embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a current sensor without a heat conductive insulating pad according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, a current sensor of a motor controller according to an embodiment of the present utility model includes a sensor housing 1, the sensor housing 1 includes a fixing plate 2, a fixing nut 3 penetrating the fixing plate 2 is embedded in the fixing plate, the fixing nut 3 fixes an output copper bar of a power module of the motor controller with the current sensor by being matched with a bolt, one end of the fixing nut 3, which is not contacted with the output copper bar, is provided with a heat conducting insulation pad 4, and the heat conducting insulation pad 4 is contacted with a controller housing of the motor controller after the current sensor is installed in the motor controller. Therefore, the heat of the output copper bar can be transferred to the fixing nut 3 and transferred to the controller shell with lower temperature through the heat conduction insulating pad 4, and the heat conduction insulating pad 4 can also play a role in insulating between the output copper bar and the controller shell.

In one embodiment of the utility model, the motor controller comprises three-phase output copper bars, and the fixing plate 2, the fixing nut 3 and the heat conducting insulating pad 4 are three groups corresponding to the three-phase output copper bars.

In one embodiment of the present utility model, as shown in fig. 1 and 2, the end of the fixing nut 3 contacting the output copper bar is opened and the end not contacting the output copper bar is closed. An opening at one end of the fixing nut 3 can be used for screwing in a bolt so as to enable the output copper bar to be contacted and fixed with the end contact, and meanwhile, the bolt can conveniently transfer more heat to the fixing nut; through the design of the closed other end, on one hand, the bolt and the fixing nut 3 can be prevented from being propped open or damaging the heat-conducting insulating pad 4 during the matched installation, and on the other hand, the contact area between the fixing nut 3 and the heat-conducting insulating pad 4 can be increased, so that better heat conduction is realized.

In one embodiment of the present utility model, the fixing nut 3 may be a copper nut, which is more beneficial to heat conduction, the sensor housing 1 is a plastic housing, and the fixing nut 3 and the fixing plate 2 of the sensor housing 1 may be an integrally injection-molded structure. The thermally conductive and insulating pad 4 may be a silica gel pad.

Furthermore, in one embodiment of the present utility model, as shown in fig. 1, at least one mounting hole 5 may be further provided on the sensor housing 1 of the current sensor of the motor controller, and the entire current sensor may be mounted and fixed to the motor controller through the mounting hole 5. In one embodiment of the present utility model, as shown in fig. 1 and 2, the sensor housing 1 of the current sensor of the motor controller may further be provided with copper bar holes 6 corresponding to the number of copper bars for the output copper bars to pass through and be fixed with the current sensor by bolts.

According to the current sensor for the motor controller, disclosed by the embodiment of the utility model, through the embedded through fixing nut of the fixing plate for fixing the output copper bar and the heat conducting insulating pad arranged at one end of the fixing nut, which is not contacted with the output copper bar, the heat of the output copper bar can be effectively dissipated, so that overheat of devices around the output copper bar is avoided, and meanwhile, the heat dissipation of the power module is assisted, so that the reliability and the service life of the motor controller are improved.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (7)

1. The utility model provides a current sensor for motor controller, its characterized in that includes the sensor casing, the sensor casing includes the fixed plate, the fixed plate is embedded to have the fixation nut who link up it, fixation nut through with the bolt cooperatees, will motor controller's power module's output copper bar with current sensor looks is fixed, fixation nut with the one end that output copper bar does not contact is provided with the heat conduction insulating pad, the heat conduction insulating pad is in after the current sensor installs in the motor controller, with motor controller's controller casing contacts.

2. The current sensor for a motor controller according to claim 1, wherein an end of the fixing nut contacting the output copper bar is opened and an end not contacting the output copper bar is closed.

3. The current sensor for a motor controller of claim 1, wherein the motor controller comprises three phase output copper bars, the fixing plate, the fixing nut, and the thermally conductive insulating pad being in three groups corresponding to the three phase output copper bars.

4. A current sensor for a motor controller according to any one of claims 1-3, wherein the fixing nut is a copper nut.

5. The current sensor for a motor controller of claim 4 wherein the sensor housing is a plastic housing.

6. The current sensor for a motor controller according to claim 5, wherein the fixing nut is of an integrally injection-molded structure with the fixing plate of the sensor housing.

7. The current sensor for a motor controller of claim 1, wherein the thermally conductive and insulating pad is a silicone pad.