JPH0312048Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a magnet type motor, and particularly to a magnet type motor having a structure such that the motor has the same torque characteristics in both forward and reverse rotations.

(Prior Art) As shown in FIG. 2, the structure of a conventional magnetic motor with commutated poles is such that an arc-shaped permanent magnet 2 that forms a field is fixed inside a moke 1. A commutating pole 3 was provided in the vicinity of to obtain a series winding characteristic. In the figure, numeral 4 represents the rotor of the armature, and 5 represents the armature winding.

When an armature current is passed through the armature winding 5 as shown in Figure 2, that is, when a direct current is passed perpendicularly to the page from the back side of the page to the front side, the armature rotor 4 is shown by the dotted arrow. Rotate clockwise. In this case, an armature current flows through the armature winding 5, and the magnetic flux generated by the armature reaction is transmitted to the illustrated commutator 3, which has a small magnetic resistance, to the air gap in the part of the commutator 3, to the rotor 4, to the commutator. The air flows through the magnetic circuit of the yoke 1, the gap between the commutating pole parts (not shown) provided in pairs in the commutating pole 3, the commutating poles (not shown), and the commutating pole parts (not shown) provided in pairs in the yoke 1. A magnetic motor having a commutated pole 3, which is magnetized respectively, has a so-called series winding characteristic.

By the way, when such a commutating pole 3 is connected to a magnetic motor installed near the permanent magnet 2 with the power supply voltage reversed, and an armature current is caused to flow as shown in FIG.
That is, when the magnet is reversed as shown by the solid line arrow in the figure, the part of the commutating pole 3 acts in the direction of demagnetization due to the armature reaction, as shown in FIG. 3, and its characteristics are significantly deteriorated.

(Problems to be solved by the invention) Even in the case of a magnetic motor having a series winding characteristic and having a commutating pole 3, it is possible to realize a motor that can rotate in both forward and reverse directions and has almost the same series winding characteristic. is strongly requested.

This invention was made in consideration of the above points,
By providing commutative poles at both ends of the permanent magnet that forms the field, and by creating a structure in which one commutating pole always acts in the magnetizing direction in both forward and reverse rotation directions, It is an object of the present invention to provide a magnetic motor having series winding characteristics that are almost the same in both directions. For this reason, the magnet type motor of the present invention is equipped with an arc-shaped permanent magnet in the yoke that forms a field, and in a magnet type motor in which the yoke is equipped with commutating poles, the above-mentioned commutating poles are provided near both ends of the permanent magnet. In addition, a short-circuited winding short-circuited by a diode is provided corresponding to each of the above-mentioned commutative poles, and the above-mentioned diode is connected to the short-circuited winding of the commutative pole located on the lagging side in the rotational direction with respect to the above-mentioned permanent magnet field. The current generated by the voltage induced in the short-circuited winding is blocked, and the current generated by the voltage induced in the short-circuited winding is blocked in the short-circuited winding of the commutative pole located on the advancing side of the rotation direction. It is characterized by being inserted in the direction of flow. This will be explained below with reference to the drawings.

(Embodiment) FIG. 1 shows a partial explanatory diagram of an embodiment of a magnet type motor according to the present invention. In FIG. 1, numerals 1, 2, 4, and 5 correspond to those in FIGS. 2 and 3. Symbols 6 and 7 are complementary poles, 8 and 9 are windings, 1
0 and 11 represent diodes.

Compensating poles 6 and 7 made of ferromagnetic material are arranged near both ends of the arc-shaped permanent magnet 2 that forms the field. Windings 8 and 9 are wound around these commutating poles 6 and 7, respectively, and the starting and ending ends of each winding 8 and 9 are short-circuited by diodes 10 and 11, respectively.

Now, when a current is applied to the armature winding 5 as shown in FIG. 1, the rotor 4 rotates in the opposite direction, that is, counterclockwise. The magnetic field generated by the current flowing through the armature winding 5, particularly the slot provided in the rotor 4, causes a slot triple change in the magnetic field, and the change in the magnetic field causes the magnetic field to be wound around the commutating poles 6, 7. An induced voltage is generated in the windings 8 and 9. The induced voltage is caused by applying a forward voltage to the diode 10 on the side of the commutator 6, causing current to flow through the diode 10 to the winding 8, whereas on the side of the commutator 7, a voltage in the reverse direction is applied to the diode 11. When a voltage is applied, the diode 11 blocks current from flowing through the winding 9, and the voltage is such that no current flows through the winding 9. Therefore, the armature reaction flowing in the armature winding 5 increases the magnetic flux density in the air gap on the side of the commutator pole 7 where the magnetizing action is performed for the reason explained in FIG. This works to reduce the magnetic flux density in the side air gap, but in the case shown in the figure, only the commutative pole 7 is provided, and the same effect as the conventional unidirectional rotation structure in which the commutative pole 6 is not present is achieved.

Conversely, when the rotor 4 of the armature rotates in the forward direction, that is, in the clockwise direction, no current flows through the winding 9 wound around the commutative pole 7, and the winding wound around the commutative pole 6 It operates so that current flows through 8. As a result, the magnetic flux density in the air gap on the side of the commutator 6 where the magnetizing action is performed increases.

In the above explanation, the permanent magnet 2 has been explained, but the magnetic poles that form a pair with the permanent magnet 2, that is, the permanent magnets forming a pair (not shown), are also provided with commutating poles near both ends of the permanent magnet. Needless to say, the structure is such that a winding short-circuited by a diode is wound around each of the above-mentioned commutative poles. The operation is also exactly the same as described above.

(Effects of the invention) As explained above, according to the invention, commutative poles are provided near both ends of the permanent magnets constituting the field, and windings short-circuited by diodes are wound around the commutative poles. The structure allows the same characteristics to be output in both forward and reverse rotations.

[Brief explanation of the drawing]

FIG. 1 is a partial explanatory diagram of an embodiment of a magnet type motor according to the present invention, and FIGS. 2 and 3 are partial explanatory diagrams illustrating the armature reaction of a conventional magnet type motor. In the figure, 1 is a yoke, 2 is a permanent magnet, 3 is a commutator,
4 is the rotor, 5 is the armature winding, 6 and 7 are the commutating poles,
8 and 9 represent windings, and 10 and 11 represent diodes.

Claims (1)

[Scope of Claim for Utility Model Registration] In a magnetic motor, the yoke is equipped with an arc-shaped permanent magnet that forms a field, and the yoke is equipped with commutating poles, wherein the commutating poles are provided near both ends of the permanent magnet, respectively. At the same time, a short-circuited winding short-circuited by a diode is provided corresponding to each of the commutative poles, and the diode is connected to the short-circuited winding of the commutative pole located on the lagging side in the rotational direction with respect to the permanent magnet field. Blocking the current generated by the voltage induced in the short-circuited winding, and allowing the current generated by the voltage induced in the short-circuited winding to flow through the shorted winding of the complementary pole located on the advancing side of the rotation direction. A magnetic motor characterized by being inserted in the direction.