JP2010252614A - Motor which uses permanent magnet for rotor (rotor) and electromagnet for stator (stator), and switches current of stator with commutator in dc motor (dc motor) - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: the DC motor using the commutator includes the rotor formed from wound wiring (coil); therefore, the rotor is enlarged and thus the whole motor also becomes larger, and a salient pole of the rotor becomes complicated, thereby causing high wiring cost. <P>SOLUTION: The DC motor includes a slip ring (2) provided on the side of the commutator (1) and individually connected with the commutator via a wire (copper or the like) (3), and a brush (4) on the slip ring (2). With the commutator having the slip ring, the rotor uses a permanent magnet, and a stator uses an electromagnet to complete a powerful motor which switches the current of the stator with the commutator having the slip ring and attaining a smaller size than a conventional type. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

Detailed Description of the Invention

The present invention eliminates the need for an electromagnet in the rotor, and can be reduced in size because only the magnet is attached to the rotor for rotation.
Costs and labor for winding coils on the rotor are eliminated, and costs can be reduced. Although the coil is necessary for the stator, it is only necessary to attach a coil capable of automatic winding to the salient pole of the stator. This can also be reduced in size.

Since a DC motor having a commutator is wound (coiled) around the rotor, the rotor becomes larger and the whole becomes larger.
For this reason, it has become an obstacle to miniaturization. In addition, the winding cost was high because the salient poles of the rotor were complicated.

Problems to be solved by the invention

(A) The DC motor with commutator is difficult to downsize because the rotor requires windings.
(B) It cost at the cost for winding.
(C) Although there was a DC motor using a permanent magnet for the rotor and an electromagnet for the stator, an electronic circuit or the like was required for control.
(D) When a DC motor using a permanent magnet for a rotor and an electromagnet for a stator is used in an electronic circuit, it cannot be used for power generation like a cell motor used in an automobile.

Means for solving the problem

A commutator in which a slip ring (2) is provided beside the commutator (1), and the commutator and the slip ring are individually connected by a line (3), and a brush (4) is provided in the slip ring (2).
Brushes {5} {6} are the same as before.

Embodiments of the present invention will be described below.
(A) Three slip rings (equal fraction of the commutator) for taking out the current to the outside are provided beside the commutator.
(B) (1) Connect the commutator and (2) slip ring individually with the line (3) (copper, etc.).
(C) Install the brush (4) and take it out (outside the rotor).
The present invention has the above configuration.
Electrical noise is not increased by attaching (2) slip ring and (4) brush. Vibration does not increase.

The invention's effect

(B) According to the present invention, the commutator-equipped DC motor does not require an electromagnet in the rotor and can be reduced in size by attaching only the magnet.
(B) The cost (labor) of winding a coil around the rotor is eliminated and the cost can be reduced.
Although the coil is necessary for the stator, automatic winding is also possible, and it is only necessary to attach the coil to the salient pole of the stator.
This can also be reduced in size.
(C) If the commutator of the present invention is used, an electronic circuit or the like becomes unnecessary.
(2) According to the present invention, when this motor is used as a generator, the rotor becomes smaller and lighter than the conventional coil winding, so that power can be generated with a smaller rotational force.
(E) Since an electronic circuit is not used, even if it is used as a cell motor for an automobile, it can also be used as a motor → power generation, power generation → motor.
(F) There is no cell motor that uses only permanent magnets for the rotor.
New.

Commutator front view Commutator diagram Perspective view Motor cross section Installation diagram of rotor and commutator (of the present invention)

1 Commutator (copper, etc.) 2 Slip ring (copper, etc.)
3 Connecting wire (copper, etc.) 4 Brush 5 and 6 Brush (for conventional commutator) 7 Green part 8 Rotor 9 Stator 10 Winding coil 11 Rotating shaft

Claims (1)

(A) In a direct current motor (DC motor),
A commutator that has a structure in which a slip ring (an equal fraction of the commutator) is attached beside the commutator (to extract the commutator current to the outside) and the current switched by the commutator flows through the stator.

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