TWI596867B - Start the generator magnetic detection device to improve the structure - Google Patents

Description

Improved structure of magnetic detecting device for starting generator

The present invention relates to a magnetic detecting device for starting a generator, and more particularly to an improved structure of a magnetic detecting device for detecting a rotational position of a rotor.

The starter generator used when the electric vehicle or the motorcycle is started includes a stator fixed to the engine casing, a rotor that rotates around the stator, and a magnetic detecting device that detects the rotational position of the rotor.

Wherein the stator has a plurality of T-shaped teeth arranged in a circular shape, and a coil is wound on each of the T-shaped teeth. A notch is provided between the specific teeth to be inserted into the magnetic detecting device. Wherein the rotor has a cylindrical shape surrounding the periphery of the stator, and the inner circumferential surface of the rotor is equidistantly disposed with a plurality of magnets, wherein the plurality of magnets are alternately arranged in the inner circumference of the rotor. Face, in other words, one end of each magnet has the same polarity as the adjacent magnet. The magnetic detecting device detects a magnetic flux change of the magnet on the rotating rotor by a Hall sensor (HALL SENSOR) disposed on the magnetic detecting device.

Thus, when the starter generator is used as the starting device of the engine, the starter generator is a mode of operation of the brushless motor, and the motor driver provides a drive signal to supply current to each coil on the stator for driving the rotor to rotate around the stator. The motor driver detects the magnetic flux change signal of the rotor rotating position by the magnetic detecting device, thereby judging the driving of the brushless motor. Motion signal.

The magnetic detecting device can be used for detecting the position of the rotor when generating the motor driving signal when the starting generator is used as the engine starting device, and the rotor position information can also be used as the engine firing signal.

When the conventional magnetic detecting device is assembled on the notch of the stator, the magnetic detecting device inserted into the notch must be attached to the stator and also attached to the outer casing of the engine, which will make the assembly process at the time of manufacture complicated, resulting in production cost. Increase.

In view of the above problems, there is a need for a simple starting generator for assembling a program, which only needs to fix the magnetic detecting device to the stator to connect the magnetic detecting device to the stator without fixing the magnetic detecting device to the outer casing of the engine. In this way, the assembly procedure of the starter generator will be effectively simplified to reduce the manufacturing cost.

In order to overcome the shortcomings of the prior art, the present invention aims to provide a magnetic detecting device for starting a generator, which can be easily assembled on a stator to reduce assembly procedures, shorten man-hours, and reduce costs.

In order to achieve the above object and effect, the main technical feature of the present invention is to provide an improved structure of a magnetic detecting device for starting a generator, wherein the starting generator includes a stator, a rotor and a magnetic detecting device, and an outer peripheral surface of a portion of the adjacent tooth portion of the stator The side edges are provided with corresponding positioning notches, the cylinder of the magnetic detecting device can be placed into the space between the adjacent tooth portions, and the end portion of the column body is provided with the convex portion of the magnetic sensing element, which can be placed therein In the positioning notch, the fixing plate of the magnetic detecting device can be locked to the stator, so that the magnetic detecting device can be easily assembled on the stator.

In order to achieve the above objects and effects, the second technical feature of the present invention is to provide The improved structure of the detecting device for starting the generator magnet, wherein the inner side surface of the notch of the stator may be an inclined surface that is open to the outside, and the outer surface corresponding to the convex portion of the column corresponding to the missing portion is parallel to the inclined surface. The sloped surface is such that the raised portion is easily slid into the gap by the inclined surface.

In order to achieve the above object and effect, another technical feature of the present invention is to provide an improved structure of the magnetic detecting device for starting the generator magnet, wherein the outer surface of the cylinder and the convex portion and the curved surface of the fixed plate have the same curved surface. And the arcuate surface of the outer curved surface of the stator is such that when the magnetic detecting device is assembled on the stator, it can be completely accommodated in the stator without protruding the outer side surface of the stator.

In order to achieve the above object and effect, another technical feature of the present invention is to provide an improved structure of the magnetic detecting device for starting the generator magnet, wherein the retracted end portion of the fixing plate is provided with a through hole corresponding to a screw hole on the stator. The magnetic detecting device can be easily assembled and assembled on the stator by screws.

10‧‧‧Magnetic detection device

11‧‧‧Cylinder

12‧‧‧ Fixed plate

13‧‧‧ raised parts

14‧‧‧through holes

15‧‧‧ screws

20‧‧‧ Stator

21‧‧‧T-shaped tooth

22‧‧‧ coil

23‧‧‧ Space

24‧‧‧ Positioning gap

24a~24d‧‧‧ Positioning gap

30‧‧‧Shell

1 is a perspective view showing the open state of a stator in a starter generator fixed to an engine casing according to the present invention.

2a is a perspective exploded view of the stator and the magnetic detecting device of the present invention. Figure 2b is a top plan view of Figure 2a.

Figure 3a is a perspective view of the stator of the present invention. Fig. 3b is a partial enlarged view of Fig. 3a showing a portion of the T-shaped tooth portion provided with a notch.

4 is a perspective view of the magnetic detecting device of the present invention.

Figure 5 is a cross-sectional perspective view showing the combination of the stator and the magnetic detecting device of the present invention.

Figure 6 is a perspective view of the present invention for locking a magnetic detecting device to a stator by screws.

Please refer to FIG. 1 , which is a schematic view showing the open state of the stator fixed to the engine casing in the starter generator of the present invention. The starter generator of the present invention includes a magnetic detecting device 10, a stator 20 and a rotor (not shown in the drawings), wherein the magnetic detecting device 10 can be mounted on the stator 20, and the stator 20 is fixed to the outer casing 30 of the engine. The outer peripheral surface of the stator 20 has a relatively rotating rotor. The rotor has a cylindrical shape. The center of the rotor is fixed to the engine crankshaft (not shown in the drawing), and the engine crankshaft is coupled to the rotor 20 to rotate around the stator 20, and the inner circumferential surface of the rotor A plurality of magnets (not shown in the drawing) are distributed, and the rotational position information of the rotor can be detected by using the magnets and the magnetic detecting device 10 of the present invention.

2a-2b, FIG. 2a is a perspective exploded view of the stator and the magnetic detecting device of the present invention. Figure 2b is a top plan view of Figure 2a. The stator 20 is provided with a plurality of T-shaped teeth portions 21 arranged in a circular radial shape, and a coil 22 is wound around each of the T-shaped tooth portions 21. When the coil 22 is energized, the T-shaped tooth portion 21 generates an electromagnetic field and a magnet in the rotor to drive the rotor to rotate, so that the starter generator is used as the starting engine. When the engine rotates and the rotor rotates, the magnetic field of the magnet drives the coil 22 on the T-shaped tooth portion 21 to generate electricity for use as a generator.

Each of the two adjacent T-shaped teeth portions 21 of the stator 20 has a space 23, and the present invention uses the space 23 to assemble the magnetic detecting device 10 on the stator 20. Please refer to FIG. 3a to FIG. 3b together, wherein FIG. 3a is a perspective view of the stator of the present invention. Fig. 3b is a partial enlarged view of Fig. 3a showing a portion of the T-shaped tooth portion provided with a notch. The present invention is provided with a positioning notch 24 on a portion of the T-shaped tooth portion 21 of the stator 20. As shown in the embodiment, four T-shaped tooth portions 21 are provided with positioning notches 24, and the positioning notches 24 are disposed adjacent to the T. The positioning gaps 24 of the adjacent T-shaped tooth portions 21 on the outer peripheral side edges of the tooth portions 21 correspond to each other via the space 23.

Please refer to FIG. 4, which is a perspective view of the magnetic detecting device of the present invention. The magnetic detecting device 10 of the present invention comprises a plurality of cylinders 11 and a fixing plate 12, and in the embodiment of the figure, there are three pillars. One end portion of the column body 11 is provided with a boss portion 13 which protrudes toward both sides of the column body 11. In essence, the engine casing 30 of the present invention is provided with a circuit substrate (not shown in the present figure), and the column 11 and the boss portion 13 of the present invention have an internal space, which can be used to mount a magnetic sensing component such as Hall. The sensor is electrically connected to the circuit substrate. The fixing plate 12 is vertically connected at the other end of the column 11, and the column 11 is connected to the flange of the fixing plate 12, such that the outer surface of the column 11, the convex portion 13 and the flange of the fixing plate 12 The surface is the same surface. The fixing plate 12 extends inwardly toward the center along both sides of the flange, and a through hole 14 is formed in the inner end portion of the fixing plate 12.

Please refer to FIG. 1 , FIG. 5 and FIG. 6 together, and FIG. 5 is a cross-sectional perspective view of the stator and the magnetic detecting device of the present invention. Figure 6 is a perspective view of the present invention for locking a magnetic detecting device to a stator by screws. When the present invention is to assemble the magnetic detecting device 10 on the stator 20, the cylinder 11 of the magnetic detecting device 10 is placed in the space 23 between the adjacent T-shaped teeth portions 21, and a space 23 accommodates a pillar body. 11. The convex portion 13 is correspondingly placed in the positioning notch 24 of the T-shaped tooth portion 21, the fixing plate 12 is parallel to one end surface of the stator 20, and the flange surface of the fixing plate 12 corresponds to the outer circular curved surface of the stator 20, and the fan The rim surface and the outer circular curved surface of the stator 20 are approximately orphaned, so that when the magnetic detecting device 10 is assembled on the stator 20, the cylindrical body 11, the fixed plate 12 and the convex portion 13 do not protrude from the outer circular curved surface of the stator 20. The retracted end of the fixing plate 12 extends toward the center of the stator 20. The stator 20 is provided with a screw hole at a position corresponding to the through hole 14 of the fixing plate 12, and the screw of the stator 20 can be locked by the through hole 14 through the through hole 14. In the hole.

Referring to FIGS. 3a-3b and FIG. 4 together, the inner surface of some of the positioning notches 24 of the T-shaped tooth portion 21 is an inclined surface that is open to the outside, and the convex portion 13 corresponding to the positioning notch 24 is placed. The corresponding outer surface is an isosceles plane parallel to the inclined surface. In the embodiment of Figure 3b, The position notches 24a, 24b, 24c, and 24d each have an inclined surface, and in the embodiment of FIG. 4, the surface of the convex portion 13 corresponding to the notches 24a, 24b, 24c, and 24d is an isotropic surface parallel to the inclined surface. The projections 13 can thus be easily positioned in the recess 24, and the cylinders 11 are likewise positioned in the space between adjacent T-shaped teeth 21. Thus, the magnetic detecting device 10 of the present invention can be assembled on the stator 20 with considerable ease.

The present invention has been described by the above-described related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the modifications and equivalents of the spirit and scope of the invention are included in the scope of the invention.

10‧‧‧Magnetic detection device

11‧‧‧Cylinder

12‧‧‧ Fixed plate

13‧‧‧ raised parts

20‧‧‧ Stator

21‧‧‧T-shaped tooth

23‧‧‧ Space

Claims (5)

An improved structure of a magnetic detecting device for starting a generator, the starting generator comprising: a stator having a plurality of T-shaped teeth arranged in a circular radial shape, each of the T-shaped teeth being wound with a coil; wherein each of the two There is a space between the adjacent T-shaped tooth portions, and a side edge of the outer peripheral surface of the adjacent T-shaped tooth portion is provided with corresponding positioning notches, the positioning notch is between the two end faces of the stator; Cylindrical, rotating around the stator, the inner peripheral surface of the rotor is distributed with a plurality of magnets; and a magnetic detecting device is fixed on a portion of the T-shaped tooth portion for detecting a rotational position of the rotor; wherein the magnetic detecting device The utility model further includes: a plurality of cylinders respectively disposed in a space between the adjacent T-shaped tooth portions, wherein one end portion of the pillars is provided with a convex portion, and the convex portion is correspondingly placed in the positioning gap And a fixing plate vertically connecting the other ends of the columns, and the column systems are connected to the fixing plate, the fixing plate is parallel to one end surface of the stator, and extends and retracts toward a center of the stator, The retracted end of the fixing plate can be locked to the stator The improved structure of the magnetic detecting device for starting the generator according to claim 1, wherein at least one inner side surface of the notch is an outwardly open inclined surface, and an outer surface corresponding to the convex portion corresponding to the notch is An isosceles slope parallel to the inclined surface. The improved structure of the magnetic detecting device for starting the generator according to claim 1, wherein the outer surface of the column and the boss is identical to the curved surface of the fixing plate The surface is approximately orphaned with the outer circular surface of the stator. The improved structure of the magnetic detecting device for starting the generator according to claim 1, wherein the retracted end portion of the fixing plate is provided with a through hole, and the stator has a screw hole at a position corresponding to the through hole, which can be passed through the screw The through hole is locked in the screw hole. The improved structure of the magnetic detecting device for starting the generator according to claim 1, wherein the convex portion of each of the columns is provided with a Hall sensor.