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vacuum motor

A vacuum motor and control circuit board technology, which is applied in the direction of electromechanical devices, electrical components, electric components, etc., can solve the problems of increased heat generation of the motor control board and affecting the normal use of the motor, etc.

Active Publication Date: 2018-11-30
SUZHOU EUP ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of analog electronic control circuits in the motor control board, the heat generated by the motor control board increases. If the motor control board cannot be effectively dissipated, it will affect the normal use of the motor.

Method used

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Embodiment Construction

[0020] In order to describe the technical content, structural features, achieved goals and effects of the invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0021] like figure 1 , 2 , The vacuum motor 100 shown in 3 is a brushless DC motor. It includes a stator 1 with a central hole 11 inside, a rotor 2 passing through the central hole 11 , a housing 3 sleeved outside the stator 1 , a control circuit board 4 inside the housing 3 and a fan assembly 5 . The stator 1 includes an iron core 12, a winding group (not shown in the figure) wound on the iron core 12, a first end plate 13 located at one end of the iron core 12, and a The second end plate 14 at the other end, the first end plate 13 and the second end plate 14 are all integrally formed. The rotor 2 is composed of a magnet 21 , a shaft 22 and a bearing 23 . The housing 3 includes a first end cover 31 for fixing one end of the stator 1 and a sec...

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Abstract

The invention relates to a vacuum motor which comprises a stator, a rotor, a casing body sleeving the stator, a control circuit board and a fan assembly. A first gap is between the stator and the rotor. A second gap is between the stator and the casing body. The fan assembly comprises a movable impeller, a fixed impeller and a hood. The hood is provided with an inlet and an outlet. The casing body comprises a first end cover and a second end cover which matches the first end cover. First and second end covers are fixedly connected through a number of screws. The first end cover and the hood are fixed. The second end cover is provided with an outer end face. The control circuit board is located inside the outer end face which is hollow. The outer end face is provided with an exhaust port. First and second gaps are communicated with the outlet and the exhaust port. According to the invention, the control circuit board is arranged inside the second end cover; air flow blown from first and second gaps can reach the control circuit board the first time; and heat generated by the control circuit board is timely taken away.

Description

technical field [0001] The present invention relates to a brushless DC vacuum motor for a vacuum cleaner. Background technique [0002] Existing vacuum cleaners that use rechargeable batteries usually use brushless DC motors to work. Compared with brushed motors, brushless motors are smaller in size and more convenient to install. [0003] In the brushless motor, in order to change the current direction of the winding in the brushless motor at the correct time, the Hall sensor is usually used to detect the magnetic position. Although the Hall sensor itself is relatively cheap, it is necessary to install the Hall sensor in the motor. The internal structure of the motor will become complicated, thereby increasing the manufacturing cost of the motor. [0004] Hall sensorless motors are known for indirect determination of the rotor position, which can be used to determine the rotor position via a polarity inversion of the back EMF induced in the phase windings. For example, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/30H02K5/20
CPCH02K5/20
Inventor 卞庄
Owner SUZHOU EUP ELECTRIC CO LTD