Brushless motor and electrical equipment

A brushless motor and casing technology, which is applied in the field of electrical equipment and brushless motors, can solve the problems of bearing electrical corrosion and excessive voltage.

Active Publication Date: 2021-02-02
GUANGDONG WELLING ELECTRIC MACHINE MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a brushless motor to solve the problem i

Method used

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  • Brushless motor and electrical equipment
  • Brushless motor and electrical equipment
  • Brushless motor and electrical equipment

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Embodiment Construction

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indic...

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Abstract

The invention provides a brushless motor and electrical equipment, the brushless motor comprises a casing, a stator and a rotor, the stator comprises a stator iron core and a winding, the rotor comprises a rotor core and a rotating shaft, the rotating shaft is sleeved with bearings, two ends of the casing are each provided with a bearing bracket for fixing the two bearings, a first conducting strip and a second conducting strip are arranged between at least one bearing bracket and the stator iron core, the first conducting strip and the second conducting strip are oppositely arranged side by side at intervals, the first conducting strip is electrically connected with the stator iron core, and the second conducting strip is electrically connected with the adjacent bearing brackets. The brushless motor is internally provided with the first conducting strip and the second conducting strip which are electrically connected with the stator core and the bearing brackets respectively, and thefirst conducting strip and the second conducting strip are arranged side by side at an interval, so that the first conducting strip and the second conducting strip can be matched to adjust the capacitive reactance between the stator core and the bearing brackets, the potential of the bearing outer ring is close to that of the bearing inner ring, shaft voltage is reduced, and electric corrosion ofthe bearing is avoided.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a brushless motor and electrical equipment using the brushless motor. Background technique [0002] In recent years, due to the energy-saving trend of air-conditioning units, high-efficiency brushless DC motors have been used to drive fans instead of induction motors. These brushless DC motors are generally driven by an inverter, which uses a pulse width modulation (Pulse Width Modulation) method (hereinafter referred to as PWM) as a driving method. When using the PWM driving method, since the neutral point potential of the winding is not zero, a common-mode voltage will be generated; in the case of high frequency, coupling capacitance will be generated between the structures of the motor, and this common-mode voltage will pass through The coupling capacitance and bearing capacitance form a loop between the stator, rotor, rotor core, bearing bracket and other parts, which w...

Claims

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Application Information

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IPC IPC(8): H02K5/16H02K11/00
CPCH02K5/161H02K11/0094H02K5/1732H02K5/15H02K2211/03H02K5/08H02K5/16H02K29/00H02K5/225
Inventor 李国雄黄成栋曾路强李虎吕继方钟贵烈吕玉婵
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG
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