CN2301720Y

CN2301720Y - Brushless motor rotation shaft test device

Info

Publication number: CN2301720Y
Application number: CN 97204295
Authority: CN
Inventors: 陈建荣
Original assignee: Yen Sun Technology Corp
Current assignee: Yen Sun Technology Corp
Priority date: 1997-06-03
Filing date: 1997-06-03
Publication date: 1998-12-23
Anticipated expiration: 2007-06-03

Abstract

The utility model relates to a brushless motor rotation shaft test device. A coil is arranged in a shaft pipe of a stator. A center shaft of a rotor is provided with a permanent magnet. The stator and the rotor move corresponding to a circumference, which leads the coil to cut a magnetic field and generate electromotive force. The electromotive force is used for controlling an indicator lamp or an alarm, which can detect whether the rotor normally rotates.

Description

The rotating shaft pick-up unit of brushless motor

The utility model relates to a kind of rotating shaft pick-up unit of brushless motor.

In the 8095 No. three " pick-up unit of motor (two) " patent case of Taiwan patent announcement, the revolution with the N utmost point and S utmost point that is provided with side by side on the rotor rotated to the mutual configuration of sense of rotation utilizing magnet and winding to drive detects the PG magnet that detects usefulness with the position of rotation of FG magnet and rotor, and the detection that is arranged on fixed head one side is used the PG pattern with being formed with side by side on the substrate to detect to detect with the FG pattern and towards the position of rotation of PG magnet towards the revolution of FG magnet, the PG lead-in wire that is connected in the FG lead-in wire of FG pattern and is connected in the PG pattern extends on detecting with substrate mutually in the opposite direction, and is directed to the outside of fixed head.In the 8488 No. three " pick-up unit of motor (one) " patent case of Taiwan patent announcement, on pedestal, be provided with flexible base plate, this flexible base plate is provided with stator winding, simultaneously on stator winding, set rotor with magnet towards this winding, and peritrochanteric is provided with the magnetic pole that detects position of rotation, this pedestal is provided with the position of rotation detection means in the face of this magnetic pole, can be along rotor sense of rotation free adjustment position, but the part relatively rotation place detection means of this flexible base plate freely changes shape, and the lead-out terminal of this position of rotation detection means is connected the conductor pattern on the flexible base plate.

Whether the purpose of this utility model is to provide a kind of rotating shaft pick-up unit of brushless motor, run well in order to detection rotor.

The purpose of this utility model is to realize like this, a kind of rotating shaft pick-up unit of brushless motor promptly is provided, establish cramp bar by stator and support a circuit substrate, establish electronic component on the described circuit substrate and constitute control circuit, described stator is provided with central siphon, described central siphon internal diameter is provided with the bearing of supporting rotor position rotating, described rotor is provided with blade and magnet ring by wheel hub, and rotate at described bearing bore diameter with a central shaft, described central shaft is provided with the recessed circular groove of an annular, is snapped with the fastener components that makes the rotor position rotating in the described circular groove; The central siphon internal diameter of described stator is installed with coil, and described centre of rotor axle external diameter is installed with permanent magnet, and described coil is positioned at the Distribution of Magnetic Field scope of described permanent magnet.

The advantage of the utility model device is, can utilize cutting magnetic field and the electromotive force signal that produces comes detection rotor whether to run well.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:

Fig. 1 is an exploded perspective view of the present utility model;

Fig. 2 is a combination section of the present utility model;

Fig. 3 is a 3-3 line sectional view among Fig. 2;

Fig. 4 is the second use illustration of the present utility model.

See also a preferred embodiment of the present utility model shown in Figure 1, it comprises stator 1, rotor 2, coil 3, permanent magnet 4.

This stator 1 is established cramp bar 11 to support a circuit substrate 12, this circuit substrate 12 is provided with electronic component 13, the control circuit of being made up of this electronic component 13 can make coil 14 produce rotating magnetic field to drive rotor 2 rotations, this stator 1 is provided with central siphon 15, these central siphon 15 internal diameters are provided with bearing 16, but supporting rotor 2 position rotating; This stator 1 combines with housing 17, and in order to protection rotor 2, in case of necessity, housing 17 can be integral with stator 1.

This rotor 2 is provided with blade 21 and magnet ring 22 by wheel hub, and passes the rotation of bearing 16 internal diameters with a central shaft 23, and this central shaft 23 is established the recessed circular groove 24 of an annular, locatees fastener components 25 such as C shape clasp in the circular groove 24, and rotor 2 can be driven in rotation.

Central siphon 15 internal diameters of this stator 1 are set with coil 3; Central shaft 23 external diameters of this rotor 2 are set with permanent magnet 4, and the distribution of the magnetic field of this permanent magnet 4 (magnetic line of force) must be contained to coil 3 positions.Therefore, when rotor 2 rotations, relative motion promptly takes place between permanent magnet 4 and the coil 3, promptly the lead of the magnetic field of this permanent magnet 4 and coil 3 produces the cutting magnetic field effect, therefore coil 3 itself promptly produces electromotive force (emf), the extension line of coil 3 is drawn other indicating circuits of external control or warning circuit, and just whether detection rotor 2 normally rotates by this.

The utility model utilizes between coil 3 and the permanent magnet 4 whether relative circular motion takes place, and produces electromotive force signal by therefore whether coil 3 cutting magnetic field takes place, and utilizes the electromotive force signal of this coil 3 to detect and judges whether rotor 2 runs well.

Claims

1. the rotating shaft pick-up unit of a brushless motor, establish cramp bar by stator and support a circuit substrate, establish electronic component on the described circuit substrate and constitute control circuit, described stator is provided with central siphon, described central siphon internal diameter is provided with the bearing of supporting rotor position rotating, and described rotor is provided with blade and magnet ring by wheel hub, and rotates at described bearing bore diameter with a central shaft, described central shaft is provided with the recessed circular groove of an annular, is snapped with the fastener components that makes the rotor position rotating in the described circular groove; It is characterized in that the central siphon internal diameter of described stator is installed with coil, described centre of rotor axle external diameter is installed with permanent magnet, and described coil is positioned at the Distribution of Magnetic Field scope of described permanent magnet.

2. according to the rotating shaft pick-up unit of the described brushless motor of claim 1, it is characterized in that the extension line of the coil in the central siphon of described stator is external in indicating circuit or warning circuit.