JP2016179536A5

JP2016179536A5 -

Info

Publication number: JP2016179536A5
Application number: JP2015061938A
Authority: JP
Filing date: 2015-03-25
Publication date: 2017-12-07
Anticipated expiration: 2035-03-25

Description

本発明のある態様は、ブラシレスモータを備える電動工具であって、
前記ブラシレスモータは、Δ結線された複数の相を有し、かつ各相に並列接続された複数のステータコイルを含み、
前記ブラシレスモータの軸方向に関する前記ブラシレスモータのステータコアの長さをＬ（ｍｍ）、前記ブラシレスモータの無負荷回転数をＲ（／ｍｉｎ）、前記ブラシレスモータの駆動電圧の実効値をＶ（Ｖ）としたとき、次の（１）及び（２）の少なくとも一方を満足する。
（１）Ｌmin＜Ｌ、かつ、Ｌmin＝（−０．０００８×Ｒ＋４６．７）×Ｖ÷２０
（２）Ｌ＜Ｌmax、かつ、Ｌmax＝（−０．００１７×Ｒ＋９３．４）×Ｖ÷２０ An aspect of the present invention is an electric tool including a brushless motor,
The brushless motor includes a plurality of stator coils having a plurality of phases Δ-connected and connected in parallel to each phase;
The length of the stator core of the brushless motor in the axial direction of the brushless motor is L (mm), the no-load rotation speed of the brushless motor is R (/ min), and the effective value of the driving voltage of the brushless motor is V (V). When satisfied, at least one of the following (1) and (2) is satisfied.
(1) Lmin <L and Lmin = (− 0.0008 × R + 46.7) × V ÷ 20
(2) L <Lmax and Lmax = (− 0.0017 × R + 93.4) × V ÷ 20

前記（１）及び（２）の両方を満足してもよい。 Both (1) and (2) may be satisfied .

Claims

An electric tool including a brushless motor,
The brushless motor includes a plurality of stator coils having a plurality of phases Δ-connected and connected in parallel to each phase;
The length of the stator core of the brushless motor in the axial direction of the brushless motor is L (mm), the no-load rotation speed of the brushless motor is R (/ min), and the effective value of the driving voltage of the brushless motor is V (V). When this is, an electric tool that satisfies at least one of the following (1) and (2).
(1) Lmin <L and Lmin = (− 0.0008 × R + 46.7) × V ÷ 20
(2) L <Lmax and Lmax = (− 0.0017 × R + 93.4) × V ÷ 20

The power tool according to claim 1, wherein both (1) and (2) are satisfied .

The electric tool according to claim 1 or 2, wherein a battery pack is detachably mounted, and driving power is supplied from the battery pack to the brushless motor.

The electric tool according to any one of claims 1 to 3, wherein an outer diameter of the stator core is 44 mm to 50 mm.

The power tool according to any one of claims 1 to 4, wherein an inner diameter of the stator core is 21 mm to 25 mm.