CN210518030U

CN210518030U - Motor controller cover opening protection device

Info

Publication number: CN210518030U
Application number: CN201921471534.7U
Authority: CN
Inventors: 王淑旺; 储诚通; 陈威; 祖彬彬
Original assignee: Hefei Daoyi Power Technology Co ltd
Current assignee: Hefei Daoyi Power Technology Co ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-05-12
Anticipated expiration: 2029-09-05

Abstract

The utility model discloses a motor controller protection device that uncaps, include: the magnet is arranged on the inner side of the upper cover of the motor controller; and the unipolar Hall sensor is arranged on a control plate of the motor controller and is positioned right below the magnet, wherein the unipolar Hall sensor is used for outputting a high level or a low level according to the detected magnetic field intensity and outputting the high level or the low level to the signal processing circuit so as to realize the uncovering detection of the motor controller. The scheme adopts a non-contact detection structure, realizes the uncovering detection and the control of the protection circuit of the motor controller, and improves the reliability and the service life of the detection of the motor controller; on one hand, the accuracy, the environmental adaptability and the assembly performance of detection are effectively improved; on the other hand, the detection scheme can be matched with an internal control circuit to realize fault logic processing and fault signal output; in addition, this scheme induction element can share a PCB with inside other circuits, and detection distance is nimble adjustable.

Description

Motor controller cover opening protection device

Technical Field

The utility model relates to an electrical apparatus detection device field of uncapping, concretely relates to machine controller protection device that uncaps.

Background

With the continuous improvement of electricity generation and utilization technologies, more and more devices are driven by low voltage electricity. The driving motor and the controller are used in various devices as a common driving device, and in actual use, a motor controller is usually connected to control the motor.

In order to adjust the working state of the motor conveniently, the control circuit is usually installed inside the motor controller and isolated by a movable cover plate. However, in the prior art, the driving motor usually adopts strong electric drive of 220V or 380V, and the controller connected with the motor also has higher voltage. For safety, the movable end cover of the motor controller needs to be ensured to be in a closed state when the motor is operated.

In the prior art, protection control is usually realized by using a contactor, a microswitch or a plug connector. However, the two detection methods have the following defects:

1. the mode detection of the contactor and the micro switch is that the upper cover is in contact with the switch to enable the metal elastic sheet in the switch to be in contact with the switch so as to conduct the switch to conduct signals, but the detection devices cannot detect or detect mistakenly under the conditions of high vibration of the automobile and certain extreme temperatures; moreover, the devices need certain space conditions for installation, and usually, a connecting wire harness needs to be added, so that the working procedures are increased, and the application environment is limited.

2. The connector mode detects, and this scheme is inside upper cover and the machine is placed respectively through the plug with a pair of connector and socket, and the mode of connector turn-on signal detects when the upper cover closes back connector, and this kind of mode need select for use the connector of higher requirement, and is with high costs. It is also possible that the solution may also give false positive faults during vehicle operation due to poor connector contact. The plug and receptacle need to be aligned during the capping process to lock, which increases assembly difficulty and the risk of damaging the connector.

SUMMERY OF THE UTILITY MODEL

For overcoming prior art's defect, the utility model aims to provide a motor controller protection device that uncaps to realize.

Therefore, the utility model provides a motor controller protection device that uncaps, include: the magnet is arranged on the inner side of the upper cover of the motor controller; and the unipolar Hall sensor is arranged on a control plate of the motor controller and is positioned right below the magnet, wherein the unipolar Hall sensor is used for outputting a high level or a low level according to the detected magnetic field intensity and outputting the high level or the low level to the signal processing circuit so as to realize the uncovering detection of the motor controller.

Further, the unipolar Hall sensor is electrically connected with a 12V low-voltage storage battery on the automobile.

Compared with the prior art, the beneficial effects of the utility model are that:

the scheme adopts a non-contact detection structure, realizes the uncovering detection and the circuit protection of the motor controller, and improves the reliability and the service life of the detection of the motor controller; on one hand, the detection accuracy, the environmental adaptability and the assembly performance are effectively improved, and the application requirements of electric automobile vibration, wide working temperature range and high reliability requirement are met; on the other hand, the detection scheme can be matched with an internal control circuit to realize fault logic processing and fault signal output; in addition, the detection device used in the scheme is flexible to use, the induction device and other internal circuits can share one PCB, and the detection distance is flexible and adjustable.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the cover opening protection device of the motor controller of the present invention; and

fig. 2 is a schematic circuit diagram of the cover opening protection device of the motor controller of the present invention.

Description of the reference numerals

1. A motor controller upper cover; 2. a magnet; 3. a control panel; 3a, a unipolar Hall sensor.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1-2 illustrate some embodiments according to the present invention.

As shown in fig. 1, a motor controller uncovering protection device comprises a magnet 2, a hall switch composed of a unipolar hall sensor 3a, and a signal processing circuit, wherein the magnet 2 is installed inside an upper cover 1 of the motor controller, the unipolar hall sensor 3a is installed on a control plate 3 and is located right below the magnet 2 and is in signal connection with the signal processing circuit, the unipolar hall sensor 3a can output high or low level according to the detected magnetic field intensity and transmit the high or low level to the corresponding signal processing circuit, and the magnetic field intensity depends on the distance between the magnet 2 and the unipolar hall sensor 3a, and uncovering detection of the motor controller is realized by using the principle.

Specifically, as shown in fig. 2, the signal processing circuit is in signal connection with the hall switch, after the upper cover is closed, the distance between the magnet 2 and the hall switch is the closest, at this time, the hall switch detects the magnetic field intensity exceeding the switch threshold value and performs level conversion, the level signal is transmitted to the logic control unit on the control board for fault judgment, and meanwhile, the signal is also transmitted to the external whole vehicle system through the signal terminal for logic processing.

In the present embodiment, the hall switch is a unipolar hall sensor, wherein the model of the unipolar hall sensor is HAL 3144E. By using the unipolar Hall sensor, only one magnetic pole (S or N pole) of the magnet is close to or far away from the sensor, the sensor can provide a group of signals (high and low voltages) to achieve the detection purpose, a logic processing circuit is relatively simple, and the difficulty is reduced.

In one embodiment, the Hall switch supplies power to the whole vehicle 12V low-voltage storage battery, so that the whole vehicle can still detect the state of the upper cover when the motor controller is in a dormant or non-operating state.

The utility model discloses a motor controller protection device that uncaps except that utility model beneficial effect in, following advantage has in addition:

1. the detection accuracy and reliability are high, and false alarm faults of the switch caused by the mechanical switch or structural design tolerance can be avoided;

2. the environment adaptability is strong, the driving working conditions of the automobile are complex and changeable due to regions and personnel driving habits, normal work is ensured under high-vibration, low-temperature and high-temperature states, and misoperation caused by mechanical switching is avoided;

3. the PCB has the advantages that manufacturability and compatibility are high, special structural design space requirements are not needed, the PCB can be shared with other circuits, and meanwhile wire harness connection possibly needed by a mechanical switch is saved;

4. the service life is long, and the service life of the magnet and the Hall chip is longer than that of a mechanical switch when the magnet and the Hall chip work under the condition of low power consumption;

6. the installation is convenient, the installation of the upper cover does not need to increase working procedures, and the normal assembly is realized;

7. the detection distance can be selected according to different structures by selecting magnets with different magnetic strengths.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a motor controller protection device that uncaps which characterized in that includes:

the magnet (2) is arranged on the inner side of the upper cover (1) of the motor controller; and

a unipolar Hall sensor (3a) mounted on the control board (3) of the motor controller and located vertically below the magnet (2),

the unipolar Hall sensor (3a) is used for outputting a high level or a low level according to the detected magnetic field intensity and outputting the high level or the low level to a signal processing circuit so as to realize the uncovering detection of the motor controller.

2. Motor controller door opening protection device according to claim 1, characterized in that the unipolar hall sensor (3a) is electrically connected to a 12V low voltage battery on board an automobile.