CN214199970U

CN214199970U - Eddy current type motor rotation angle sensor structure

Info

Publication number: CN214199970U
Application number: CN202120362566.4U
Authority: CN
Inventors: 杨帆; 伊晨晖; 康元福
Original assignee: Zhejiang Woder Technology Group Co ltd
Current assignee: Zhejiang Woder Technology Group Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-09-14
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to a sensor structure of car. An eddy current type motor rotation angle sensor structure comprises a sensor body, wherein the sensor body is arranged on a cylinder body of a hybrid power module and is connected to a sensor connector through a wire harness, a signal wheel is arranged on one side of the sensor body, and the signal wheel is arranged on a rotor of the hybrid power module; a PCB is arranged in the sensor body, and a chip and an induction coil are arranged on the PCB. The utility model provides an eddy current type motor corner sensor structure which has small volume, integral flattening, high safety level and convenient installation; the technical problems of large size, heavy weight, high cost and poor arrangement flexibility of the rotary transformer in the prior art are solved.

Description

Eddy current type motor rotation angle sensor structure

Technical Field

The utility model relates to a sensor structure especially relates to the sensor of the corner of motor shaft in the test motor transmission.

Background

At present, new energy vehicles are developed vigorously, wherein hybrid vehicles without mileage anxiety are more and more favored, and the hybrid vehicles are divided into the following parts according to the framework of an electrified part and the difference of the positions of motors: the P0, P1, P2, P3, P4, ps (power split) configuration, regardless of the form of architecture, places high demands on spatial layout and functional safety. Most of the conventional rotation angle sensors of the motor adopt rotary transformers, but the rotary transformers have the defects that the rotary transformers are difficult to overcome, namely, the rotary transformers are large in size, heavy in weight and low in functional safety level, and are very unfavorable for the design of hybrid new energy automobiles.

As in the Chinese patent: "rotation angle sensor" (CN 201380038262.0) "comprises a housing, at least one rotor rotatably supported in the housing, and a printed circuit board having electric and/or electronic components and one or more stators corresponding to the number of rotors. The rotation angle sensor should be improved to ensure a very precise orientation of the first rotor relative to the poles of the stator and be inexpensive to manufacture. This is achieved in the following way: a first one of the rotors is locked with the housing without play, wherein a spring ring is provided which pre-biases the locking arm. But the rotary transformer has complex structure, large size and weight, high cost and unsatisfied functional safety requirements.

Disclosure of Invention

The utility model provides an eddy current type motor corner sensor structure which has small volume, integral flattening, high safety level and convenient installation; the technical problems of large size, heavy weight, high cost and poor arrangement flexibility of the rotary transformer in the prior art are solved.

The above technical problem of the present invention is solved by the following technical solutions: an eddy current type motor rotation angle sensor structure comprises a sensor body, wherein the sensor body is arranged on a cylinder body of a hybrid power module and is connected to a sensor connector through a wire harness, a signal wheel is arranged on one side of the sensor body, and the signal wheel is arranged on a rotor of the hybrid power module; a PCB is arranged in the sensor body, and a chip and an induction coil are arranged on the PCB. The chip is attached to the PCB board, and the induction coil is etched. On mixing the module, relatively stricter to the requirement in space, the sensor body can be through wearing the side of jar mode direct mount at the cylinder body of module, and the sensor body platykurtic occupies an area of for a short time, easy to assemble. The signal wheel is arranged on the rotor, the rotor rotates to drive the signal wheel to rotate, the position of the signal wheel on the induction coil changes to cause voltage change, and analog or digital signals are output through the chip conditioning, so that corner data are obtained. The sensor outputs four paths of electric signals which are respectively sin +, sin-, cos +, cos-, and the system can calculate the rotation angle position and the rotation speed of the motor by processing the relationship among the four groups of signals. The eddy current sensor has better anti-interference performance of stray magnetic fields, thereby ensuring the precision of the sensor. The sensor signal is output to the traveling crane computer through the wiring harness and the connector.

Preferably, the sensor body and the signal wheel are parallel to each other in the axial direction. The sensor body is arc-shaped, and the projection of the sensor body in the axial direction is positioned on the signal wheel. The layout is compact, the position change can be conveniently induced, and too much axial space is not occupied.

Preferably, the signal wheel is an inner gear ring with convex teeth facing the center, and the convex teeth are uniformly distributed on the signal wheel. The arrangement of the convex teeth is convenient for signal acquisition and has good sensitivity.

Preferably, the sensor body comprises a shell, a PCB is arranged in the shell, a cover plate is arranged on the PCB, and a sealing ring is arranged on the cover plate. The apron assembly is inside the sensor through laser welding with PCB board sealing on the casing, dustproof waterproof grease proofing, and in the seal groove of casing was installed to the sealing washer, reach the sealed effect of sensor and cylinder body.

Therefore, the utility model discloses an eddy current formula's motor corner sensor structure possesses following advantage: compact structure, small light in weight, the installation is arranged more in a flexible way, through sensor body and the ascending arrangement of signal wheel in axial direction, has saved the inner space greatly, and whole flattening has higher function safety level when possessing traditional resolver's performance simultaneously.

Drawings

Fig. 1 is a schematic diagram of an eddy current type motor rotation angle sensor structure.

Fig. 2 is an installation and use state diagram.

Fig. 3 is an exploded view of the sensor body.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b):

as shown in fig. 1 and 2, the eddy current type motor rotation angle sensor structure includes a sensor body 1, wherein the sensor body 1 is mounted on a side surface of a cylinder 6 of a hybrid drive module of a P2 framework in a cylinder penetrating manner; the sensor signal is connected to a sensor connector 5 via a wiring harness 4. The sensor connector 5 is located outside the cylinder 6. A rotor is arranged in the hybrid drive module, a signal wheel 2 is arranged on the rotor, the signal wheel 2 is an inner gear ring with convex teeth 3 facing the center, and the convex teeth 3 are uniformly distributed on the signal wheel. The sensor body 1 is arc-shaped, the sensor body 1 and the signal wheel 2 are parallel to each other in the axial direction, and the projection of the sensor body 1 in the axial direction is positioned on the signal wheel 2.

As shown in fig. 3, the sensor body 1 includes a housing 12, the wire harness 4 and the pins 11 are welded in advance, the wire harness is manufactured in the housing 12 through an injection molding process, a PCB 9 is installed in the housing 12, a chip, a capacitor, a resistor and an induction coil 10 are installed on the PCB 9 in advance, the PCB 9 is installed in the housing 12 and welded with the pins 11, and is riveted with plastic guide posts on the housing 12; a cover plate 8 is arranged above the PCB 9, the cover plate 8 is assembled on the shell 9, and the PCB 9 is sealed inside the sensor through laser welding, so that the sensor is dustproof, waterproof and oilproof; a sealing ring 7 is further arranged above the cover plate 8, and the sealing ring 7 is installed in a sealing groove of the shell, so that the effect of sealing the sensor and the cylinder body is achieved.

The hybrid drive module with the P2 framework is internally integrated with a motor and a clutch, and the hybrid drive module with the P2 framework is arranged between an internal combustion engine and a gearbox, so that the requirement on the size of a space is very strict. Therefore, the flat sensor body is selected and fixed on the cylinder body, the signal wheel is positioned in the rotor, the axial space is small, and the module installation requirement is met. The signal wheel rotates along with the rotation of the rotor, the convex teeth on the signal wheel sequentially pass through the sensor body, the position of the signal wheel on the induction coil changes to cause voltage change, and analog or digital signals are output through chip conditioning, so that corner data are obtained.

Claims

1. The utility model provides an eddy current formula's motor corner sensor structure, includes the sensor body, its characterized in that: the sensor body is arranged on a cylinder body of the hybrid power module, the sensor body is connected to the sensor connector through a wire harness, a signal wheel is arranged on one side of the sensor body, and the signal wheel is arranged on a rotor of the hybrid power module; a PCB is arranged in the sensor body, and a chip and an induction coil are arranged on the PCB.

2. The eddy current type motor rotation angle sensor structure according to claim 1, characterized in that: the sensor body is parallel to the signal wheel in the axial direction.

3. The eddy current type motor rotation angle sensor structure according to claim 2, characterized in that: the sensor body is arc-shaped, and the projection of the sensor body in the axial direction is positioned on the signal wheel.

4. The eddy current type motor rotation angle sensor structure according to claim 1, 2, or 3, characterized in that: the signal wheel is an inner gear ring with convex teeth facing the center, and the convex teeth are uniformly distributed on the signal wheel.

5. The eddy current type motor rotation angle sensor structure according to claim 1, 2, or 3, characterized in that: the sensor body include the casing, be equipped with the PCB board in the casing, be equipped with the apron on the PCB board, be equipped with the sealing washer on the apron.