KR940004780B1 - Commutator of motor to use 110/220 volt - Google Patents

Abstract

The 110V/220V compatible commutator motor includes a rotator coil having both terminals connected to adjacent commutator braids, and a voltage select switch for serially connecting the rotator coil between commutator braids directly connected to brushes by electrically connecting two commutator braids, thereby saving manufacturing cost.

Description

100 / 220V combined commutator electric motor

1A and 1B are schematic and wiring diagrams showing a conventional voltage stage commutator motor.

2a and 2b are schematic and wiring diagrams showing a conventional 100 / 220V combined commutator motor.

3 is a schematic view showing a 100 / 220V combined commutator motor of the present invention.

Figure 4 is an exploded view showing the rotor coil wound on the rotor core in the 100 / 220V combined commutator motor of the present invention.

5 is an enlarged sectional view taken along the line A-A of FIG.

6 is an enlarged sectional view taken along the line B-B in FIG.

7 is a connection diagram of a 100 / 220V combined commutator motor of the present invention.

* Explanation of symbols for main parts of the drawings

21: axis of rotation 22: rotor core

23A: commutator part 24: rotor coil

25, 25A: Brush 27A-27D: Stator coil

28: voltage selection means 29: connection

30: fixing part 31: fixing means

31A: Insertion groove 31B: Spring

31C: Fixing ball 31D, 31E: Fixing groove

SW21, SW22: Voltage selector switch AC: AC power

The present invention relates to a 100V / 220V combined commutator motor using a voltage of 100V and 200V, in particular, the current flow of the rotor coil is changed to 100V and 220V by connecting and opening the commutator piece by the voltage selection means. The present invention relates to a 100V / 220V combined commutator motor that can be used as a dual purpose.

In general, the voltage supplied to each home is 100V and 220 coexist.

Therefore, most of the electrical and electronic products used in the home are manufactured and spread to operate at a voltage of 100V and 220V.

However, it does not work for the voltages of the commutator motors 100V and 220V which are mainly used in the vacuum cleaner, but operates at any one voltage.

If the structure of such a short-voltage rectifier motor is shown as shown in Figure 1a.

Here, reference numeral 1 denotes a rotation axis. The rotating shaft 1 is provided with a rotor core 2 and a commutator 3 having a plurality of commutator pieces 3A. A rotor coil 4 is wound around the rotor core 2 and connected to the commutator piece 3A, and the commutator piece 3A is insulated from each other by the mica 5 and rotates together with the rotating shaft 1 to form a brush ( 6A) 6B is selectively contacted. A stator core 7 is provided to the outside of the rotor core 2 so that the stator coil 8 is wound around the stator core 7.

FIG. 1B is a connection diagram of a commutator commutator motor. As shown here, the AC power source AC is connected to be applied to the brushes 6A and 6B via the stator coils 8A and 8B, and the brushes 6A and 6B are in contact with each other. The rotor coils 4A and 4B are connected in parallel to the commutator piece 3A.

In the voltage stage commutator motor having such a structure, the rotor coils 4A and 4B and the stator coils 8A and 8B generate magnetic lines as AC power is applied, and the suction force between the generated magnetic lines and The rotor core 2 is rotated by the repulsive force to rotate the rotating shaft 1 and the commutator 3.

Here, the total resistance value of the short-voltage rectifier motor according to 100V and 220V has a ratio of about 1: 2, and the number of turns of the coils 4A, 4B and stator coils 8A, 8B and the coil The resistance value is controlled using the diameter.

However, when the voltage stage commutator motor operates only at a voltage of 100V or 220V, for example, when applied to a vacuum cleaner, the consumer checks the voltage supplied to his / her home, and the vacuum cleaner with a built-in commutator motor operated at the voltage. Not only does it have to be a lot of trouble, but if the operating voltage of the vacuum cleaner's rectifier motor is different from the supplied voltage, it is necessary to purchase a vibration cleaner again. Each of them has to be produced separately, so a lot of production equipment costs are required, which causes the product to increase in production cost.

Recently, a commutator motor has been developed that uses two commutators to operate at 100V and 220V. When the structure of this 100V / 220V combined electric motor is shown, it is as shown in FIG. 2A.

Here, reference numeral 11 denotes a rotation axis. The rotor core 12 is fixed to the rotating shaft 11, and the commutator 13 and 14 having a plurality of commutator pieces 13A and 14A are fixed to be symmetric about the rotor core 12. do. The rotor coil 15 is wound around the rotor core 12. The rotor coil 15A and 15B for the 100V and the rotor coil 15C and 15D for the 220V are wound together to rotate the rotor coil 15A. 15B is connected to the commutator piece 13A, and 220V rotor coils 15C and 15D are connected to the commutator piece 14A, and these commutator pieces 13A and 14A rotate together with the rotary shaft 11. Contact with the brushes 16, 16A, 17, 17A. The stator core 18 is fixed to the outside of the rotor core 12 so as to face the rotor core 12, and the stator coil 19 is wound around the stator core 18. Separated into two and wound.

2b is a connection diagram of a 100V / 220V combined commutator motor. As shown therein, the AC power source AC is connected to the movable terminal of the voltage switching switches SW1 and SW2 via the stator coils 19A and 19B, and one side of the voltage switching switches SW1 and SW2. The fixed terminals a1 and a2 are connected to both terminals of the rotor coils 15A and 15B for 100V through the brushes 16 and 16A and the commutator 13A, respectively, and the voltage switching switch SW1 and SW2. The other fixed terminal (b1) (b2) of) is connected to both terminals of the rotor coil (15C) (15D) for 220V through the stator coil (19C) (19D), brush (17) (17A) and commutator (14A). Each was connected.

The conventional 100 / 220V combined commutator motor configured as described above connects the movable terminal of the voltage switching switch SW1 (SW2) to one side fixed terminal a1 (a2) when the AC power source AC is 100V.

Then, the stator coils 19A and 19B and the 100V rotor coils 15A and 15B generate magnetic lines according to the applied 100V AC power source AC, and the rotor cores 12 are generated by the generated magnetic lines. As the rotating shaft 11 and the commutator 13, 14 is rotated.

When the AC power source AC is 220V, the movable terminals of the voltage switching switches SW1 and SW2 are connected to the other fixed terminals b1 and b2.

The stator coils 19A, 19C, and 19B, 19D are connected in series, respectively, and the stator coils 19A-19D and the rotor coils 15C for 220V are applied in accordance with an applied AC power supply of 220V. 15D generates a magnetic force line, and the rotating shaft 1 and the commutator 13 and 14 rotate as the rotor core 12 is rotated by the generated magnetic force line.

However, since the conventional 100V / 220V combined commutator motor has to wind the rotor coil for 100V and the rotor coil for 220V on the rotor core respectively, the size of the slot of the rotor core must be large and in the axial direction. In addition to the increased length, two commutators and four brushes have to be used to increase the size, increase the production cost due to the use of many materials, and increase the friction loss between the commutator and the brush by using two commutators. There were various problems such as increased inertia.

The present invention has been devised to solve the above-mentioned conventional problems. Only one-half of the rotor coils connected between brushes are connected in series by opening and opening two commutator pieces of a commutator with voltage selection means. The purpose of the present invention is to provide a 100V / 220V combined commutator motor which is used for both 100V and 220V while being connected in series and all in series, which will be described in detail with reference to FIGS. 3 to 7.

3 is a schematic view showing a 100V / 220V combined commutator motor of the present invention. Here, reference numeral 21 denotes a rotating shaft, reference numeral 22 denotes a rotor core, and reference numeral 23 denotes a commutator in which a plurality of commutator pieces 23A are mutually insulated by a mica 23B.

As shown in FIG. 4, the rotor coil 24 is wound around the rotor core 22, and both terminals of the rotor coil 24 are connected to the commutator pieces 23A adjacent to each other. Two brushes 25 and 25A are fixed to the outside of the commutator 23 so that the plurality of commutator pieces 23A sequentially contact the brushes 25 and 25A as the commutator 23 is rotated.

Reference numeral 26 denotes a stator core that is fixedly installed to face the rotor core 22. A stator coil 27 is wound around the stator core 26.

Reference numeral 28 is a voltage selection means. The voltage selecting means 28 includes several connecting pieces 29 capable of electrically connecting two commutator pieces 23A of the commutator 23 two by one, as shown in FIGS. 5 and 6, and the rotating shaft 21. ) Is provided with a cylindrical fixing portion 30, and a fixing means 31 capable of fixing the voltage selecting means 28 to the rotating shaft 21.

The fixing means 31 forms the insertion groove 31A in the fixing portion 30 to sandwich the spring 31B and the fixing ball 31C, and to form the fixing groove 31D and 31E in the rotating shaft 21. The fixing ball 31C was selectively inserted into the fixing grooves 31D and 31E so that the voltage selecting means 28 was fixed to the rotation shaft 21.

7 is a connection diagram of the 100V / 220V combined commutator motor of the present invention, as shown in the figure, by separating the stator coils 27 into four and the AC power source AC selects power through the stator coils 27A and 28B. Connected to the movable terminal of the switches SW21 and SW22 and one terminal of the stator coils 27C and 27D, and the fixed terminals of the voltage selection switch SW21 and SW22 and the stator coils 27C and 27D. The other terminal was connected to the brush 25 (25A).

The rotor cores 24A and 24B are connected in parallel or connected in series by the connecting pieces 29 of the voltage selecting means 28 between the commutators 23A in contact with the brushes 25 and 25A. The rotor coils 24A, 24C and 24B and 24D that are connected are connected in parallel.

The 100V / 220V combined commutator motor of the present invention configured as described above opens the voltage selector switch SW21 (SW22) when the AC power source AC is 220V, and moves the voltage selector 28 to fix the ball 31C. The insertion and connecting piece 29 is not in contact with the commutator piece 23A in the fixing groove 31E.

Then, the 220V AC power source AC is applied to the brushes 25 and 25A through the stator coils AC sequentially through the stator coils 27A and 27C and 27B and 27D.

The AC power source AC applied to the brushes 25 and 25A is applied to the rotor coils 24A and 24C and 24B and 24D through the commutator pieces 23A, and the commutator motor is operated at 220V.

When the AC power source is 100 V, the voltage selection switches SW21 and SW22 are connected, and the voltage selecting means 28 is moved so that the fixing ball 31C is inserted into the fixing groove 31D and the connecting piece 29 ) Electrically connects two commutator pieces 23A.

Then, the applied AC power of 100V is applied to the brushes 25 and 25A through the stator coils 27A and 27B and the voltage selector switch SW21 and SW22, and to the brushes 25 and 25A. The applied AC power source AC is applied to the rotor coils 24A and 24B through the commutator pieces 23A so that the commutator motor operates at 100V.

That is, according to the present invention, the stator coils 27A, 27C (28B, 27D) for 100V are respectively opened by opening the voltage selector switch SW21 (SW22) and preventing the connecting piece 29 from being connected to the commutator piece 23A. Since the rotor coils 24 between the commutator pieces 23A in contact with the brushes 25 and 25A are all connected in series as shown in FIG. The motor is operated at 220V, and the voltage selector switch SW21 (SW22) is connected and the connecting piece 29 electrically connects the commutator pieces 23A two by two, thereby stator coils 27B and 27D for 100V. AC power is not applied to the stator coils 27A and 27B for 100V, and the rotor between the commutator pieces 23A is in contact with the brushes 25 and 25A. Since only 1/2 of the coil 24 is connected in series, AC power is applied and the other half is not applied with AC power. Groups are operated for a 100V.

As described in detail above, the present invention uses a commutator motor for both 100V and 220V by simply switching the voltage selector switch and moving the fixed position of the voltage selector switch. Thus, the present invention manufactures the same size as the conventional commutator motor. Can be manufactured in one production line, not only can reduce the production equipment cost but also the production cost.

Claims (3)

100V stator coils 27A and 27B or two 100V stator coils 27A and 27C (27B and 27D) are connected in series between the input AC power source AC and the brushes 25 and 25A. A rotor coil 24 which is switched, is wound around the voltage selector switch SW21 (SW22), the rotor core 22, and both terminals are respectively connected to the adjacent commutator pieces 23A, and the commutator pieces 23A. Are electrically connected two by two so that the rotor coils 24 between the commutator pieces 23A in contact with the brushes 25 and 25A are all connected in series or only 1/2 in series. 100V / 220V combined commutator motor characterized by the configuration. 2. The voltage selecting means (28) according to claim 1, wherein the voltage selecting means (28) includes a connecting piece (29) for electrically connecting the two commutator pieces (23A), a fixing portion (30) into which the rotating shaft (21) is fitted, and a voltage selecting means ( 100V / 220V combined commutator electric motor, characterized in that the 28 is composed of a fixing means 31 to be fixed to the rotating shaft (21). The method of claim 2, wherein the fixing means 31 forms an insertion groove 31C in the fixing portion 30 to fit the spring 31B and the fixing ball 31C, the rotating shaft 21 in the fixing groove 31D. 31E is formed so that the fixing piece 31C is selectively fitted into the fixing grooves 31D and 31E so that the connecting piece 29 connects and separates the commutator pieces 23A by two. 100V / 220V combined commutator electric motor made.