| 摘要 |
<p>The invention relates to a sense indicator to be used for identifying the sense of rotation of the rotary magnetic field in three-phase asynchronous motors. According to the invention, the indicator consists of a rotor (1) made of aluminium, having inside a ferromagnetic medium (2) being formed within a glass tube (3) to which a plastic handle (4) is attached, the rotor being fixed at its upper end by a screw (5) wherein a bearing is made, which is fixed inside a plug (6) and introduced in a stator supplied from a three-phase voltage source, the sense of rotation of a helical path (7) cut into the rotor (1) and filled with paint being tracked by means of a funnel-shaped mirror (8) attached to the external walls of the glass tube (3).</p> |
