KR-20260067234-A - Motor apparatus adapting stator damper

KR20260067234AKR 20260067234 AKR20260067234 AKR 20260067234AKR-20260067234-A

Abstract

A motor device having a stator damper according to the present invention comprises: a motor housing having a space inside; a stator installed inside the motor housing; and a rotor rotatably installed with respect to the stator; wherein the stator has a stay having a hollow portion in which a rotating shaft constituting the rotor is rotatably installed in the central portion, and a stator core having a plurality of teeth and slots is coupled to the outer side of the hollow portion, and the stator damper is made of a flexible material disposed between the stator core and the hollow portion to mitigate the transmission of vibrations of the stator core to the hollow portion.

Inventors

양승진
장경흠
정창규

Assignees

디와이오토 주식회사

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (9)

Motor housing with internal space; A stator installed inside the above motor housing; and A motor device comprising a rotor rotatably installed with respect to the above stator, The above stator is provided with a stay having a hollow portion in which a rotating shaft constituting the rotor is rotatably installed in the central portion, and A stator core having a plurality of teeth and slots is coupled to the outer side of the above-mentioned hollow portion, and A motor device having a stator damper, characterized by including a stator damper made of a flexible material disposed between the stator core and the hollow portion to mitigate the transmission of vibrations of the stator core to the hollow portion.
In paragraph 1, On the outer surface of the above-mentioned hollow portion, first irregularities are alternately formed along the circumferential direction of the above-mentioned hollow portion, and A motor device having a stator damper, characterized in that a second uneven portion that engages with the first uneven portion is formed on the inner surface of the stator damper.
In paragraph 1, On the outer surface of the stator damper, third irregularities are alternately formed along the circumferential direction of the hollow portion, and A motor device having a stator damper applied thereto, characterized in that a fourth protrusion is formed on the inner surface of the stator core to engage with the third protrusion.
In paragraph 2, A motor device having a stator damper, characterized in that the second uneven portion is extended in the longitudinal direction of the rotation shaft.
In paragraph 3, A motor device with a stator damper applied, characterized in that the third uneven portion extends in the longitudinal direction of the rotation shaft.
In paragraph 2, A motor device having a stator damper, characterized in that the convex portion constituting the second uneven portion forms a flat plane, and the concave portion constituting the second uneven portion forms a curved surface.
In paragraph 3, A motor device having a stator damper, characterized in that the concave portion constituting the third uneven portion forms a flat surface, and the convex portion constituting the third uneven portion forms a curved surface.
In paragraph 2, On the outer surface of the stator damper, third irregularities are alternately formed along the circumferential direction of the hollow portion, and A fourth protrusion is formed on the inner surface of the stator core that engages with the third protrusion. A motor device having a stator damper, characterized in that the convex surface of the second uneven part and the concave surface of the third uneven part, arranged to face each other, are parallel to each other.
In paragraph 8, A motor device with a stator damper applied, characterized in that the size of the convex portion of the second irregular portion is formed to be larger than the size of the concave portion of the third irregular portion.

Description

Motor apparatus adapting stator damper The present invention relates to a BLDC motor, and more specifically, to a blower motor device used in an air conditioning system for a vehicle. A vehicle air conditioning system is a device that heats or cools the interior of a vehicle by introducing outside air into the cabin or circulating indoor air. Inside the vehicle air conditioning system, components such as an evaporator for cooling and a heater core for heating are installed. Additionally, a blower motor unit for blowing air is essential for the vehicle air conditioning system. The blower motor unit is equipped with a motor at the bottom, and a Sirocco fan is installed above the motor. The Sirocco fan rotates integrally with the rotating shaft of the blower motor unit. Generally, a DC motor is used for the blower motor unit, but recently, high-performance brushless motors are being adopted. Such blower motors operate based on the principle of electromagnetic mutual induction between the stator and the rotor. However, cogging torque is generated by the difference in magnetic fields that occurs as the rotor's permanent magnets, resulting from electromagnetic interaction, pass through the teeth and slots of the stator's core. Due to this cogging torque, the rotor and stator of the motor cannot rotate smoothly. When the rotor vibrations caused by this cogging torque are transmitted to the stator, they are converted into vibrations of the stator directly fixed to the vehicle. The stator vibrations are transmitted to the motor housing, and as these vibrations are transmitted to the components assembled with the motor housing, there is a problem in that unpleasant vibrations and noise (NVH) are felt by passengers inside the cabin. FIG. 1 is a drawing showing the external appearance of a motor device according to the present invention. FIG. 2 is an exploded perspective view of the main components shown in FIG. 1. Figure 3 is a cross-sectional view along line III-III shown in Figure 1. Figure 4 is a drawing showing an enlarged view of the structure of the stator illustrated in Figure 2. Figure 5 is an exploded perspective view of the main components shown in Figure 4. Figure 6 is a cross-sectional view along line VI-VI shown in Figure 4. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in describing preferred embodiments of the present invention in detail, specific descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the present invention. Additionally, the same reference numerals are used throughout the drawings for parts having similar functions and operations. The term 'comprising' a component means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components. Specifically, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Singular expressions include plural expressions unless the context clearly indicates otherwise. Additionally, the shapes and sizes of elements in drawings may be exaggerated for clearer explanation. FIG. 1 is a drawing showing the external appearance of a motor device according to the present invention. FIG. 2 is an exploded perspective view of the main components shown in FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 1. FIG. 4 is a drawing showing an enlarged view of the structure of the stator shown in FIG. 2. FIG. 5 is an exploded perspective view of the main components shown in FIG. 4. FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. 4. Referring to FIGS. 1 to 6, a motor device (10, hereinafter referred to as "motor device") to which a stator damper according to the present embodiment is applied can be applied to a blower motor used in an air conditioning system of a vehicle. The above motor device (10) includes a motor housing (20), a stator (30), and a rotor (70). The motor housing (20) is provided with an internal space. The motor housing (20) may be manufactured from synthetic resin. The motor housing (20) includes a lower housing (22) and an upper housing (24). The lower housing (22) may be configured with a structure in which the lower end is closed and the upper end is open. The upper housing (24) is a structure that covers the upper part of the lower housing (22). The upper housing (24)