RU2195755C2 - Mechanical design of field winding on motor stator core - Google Patents

Abstract

FIELD: electrical engineering; motors with improved field winding on stator core. SUBSTANCE: field winding on stator core of motor that has stator and rotor is characterized in that it incorporates series-connected upper coils and lower ones, first power leads being formed on one end of lower coils and connecting wire disposed between lower and upper coils being used to form second power leads for selective power supply through first or second power leads when motor is placed in operation so as to ensure choice of desired number of field winding turns. Proposed design makes it possible to prevent excessive temperature rise in motor at the same time enabling selective use of field coils. EFFECT: enhanced reliability. 2 cl, 3 dwg

Description

 The present invention relates to an engine used for vacuum cleaning, etc., and more particularly, to an engine with an improved design of the field winding on the stator core to increase engine reliability.

 Recently, in order to effectively reduce the energy consumption of electronic products, some countries of the world have standardized the requirements for electric energy and electric current of electronic products for sale in these countries. Thus, in order to produce electronic products that comply with the guidelines for electricity and current in each country, manufacturers of electronic products must expend great efforts to reduce the consumption of electricity and current by reducing the harmonic element of alternating current (AC) flowing under load when AC voltage is applied .

 In the production of electronic products that consume less electricity and current, in accordance with the norms of certain countries, some changes were made to a conventional engine by using another material for the core in the engine or by increasing the turns on the armature and on the excitation coil in the engine to suppress the formation of a harmonic element in AC.

 There is a certain restriction on the absolute reduction of the harmonic element of the AC by using another material for the engine. As the winding increases, the motor size becomes larger. Therefore, the diameter of the wire is reduced for small products, such as a vacuum cleaner. However, with a decrease in diameter, there is a tendency to an excessive increase in temperature in the motor, which sometimes leads to a short circuit in the winding.

 The present invention is intended to solve the above problems, and the subject of the present invention is to provide a motor in which the formation of a harmonic element AC is suppressed by selectively using a field coil.

 Another objective of the present invention is to improve the reliability of the product by improving the design of the field winding on the stator core to prevent excessive temperature rise in the motor.

 According to an object of the present invention, there is provided a design of an excitation winding on a stator core in an engine having a stator and a rotor, in which the stator excitation coil comprises in series upper coils and lower coils, wherein the first electrical inputs are formed on one side of the lower coils, and the connecting wire located between the lower coils and upper coils and forms the second electrical inputs to enable selective supply of electricity through the first sludge and second electrical inputs, when the motor is powered, to enable selection of the number of turns of the field coil.

 In accordance with another object of the present invention, there is provided a field winding design on a stator core in which the lower coils are wound first on the stator core and the upper coils are wound on the outer sides of the lower coils to provide effective cooling of the upper coils.

 For a more complete understanding of the essence and objectives of the invention, a description is given with reference to the following drawings.

 Figure 1 is a schematic diagram of a conventional engine.

 FIG. 2 is a sectional view of the field coil of the present invention.

FIG. 3 is a schematic diagram illustrating the position of the compounds of this invention.
As shown in FIG. 1, the motor comprises a stator core 22, a stator 20 with a field coil 24, and a rotor 10 driven by an electromotive force generated in the stator 20. In the engine of the present invention, as shown in FIG. 2, there is a core 22 a stator with a lower coil wound, having fewer turns of two types of field coil (L1 and L4, 50 turns, for example), and with an upper coil wound on the outside of the lower coil, with a large number of turns of two types of field coil (L2 and L3, 10 0 turns, for example).

 An electrical input is formed between the lower coils (L1 and L4) and the upper coils (L2 and L3) via a connecting wire. The first electrical inputs (A1 and A2) are formed on the upper coils (L2 and L3), while the second electrical inputs (B1 and B2) are formed on the lower coils (L1 and L4).

 The following describes in detail the action of the engine made according to this invention. When energy is supplied to the electronic product containing the engine and to the second electrical inputs (B1 and B2), the energy directed to the second electrical inputs (B1 and B2) is transmitted to the lower coils (L1 and L4) and the upper coils (L2) connected in series and L3), while the rotor rotates at a low speed, since the magnetic force generated in the upper coils (L2 and L3) is weak.

 When energy is supplied to the second electrical inputs (B1 and B2), the lower coil (L1) and the upper coil (L2) are connected in series (i.e. in the state of the upper winding), while the energy consumption becomes smaller, and the harmonic element allows you to rotate engine in accordance with the international harmonic element standard with less energy consumption.

 When the user increases the engine speed to the highest value, a regulating means (not shown) connects the first electrical inputs (A1 and A2) to reduce the number of turns of the winding and excitation for the possibility of energy transfer to the upper coil (L2). As described above, when energy is supplied to the first electrical inputs (A1 and A2), the number of turns of the field winding decreases and energy consumption increases to rotate the motor at the highest speed.

 Since the lower coils (L1 and L4) are wound around the stator core to form the first electrical inputs (A1 and A2), and the upper coils (L2 and L3) are wound on the outside of the lower coils (L1 and L4), the temperature rises excessively the engine is prevented by increasing its cooling effect.

 As described above, an advantage of the present invention is that the harmonic element AC is suppressed since the field winding can be used selectively. In addition, another advantage of the present invention is that an excessive temperature increase in the engine is prevented since the upper coil is wound on the outside of the lower coil.

Claims (2)

 1. The design of the field winding on the stator core of the motor having a stator and a rotor, characterized in that the stator field winding comprises in series upper and lower coils, the first electrical inputs being formed on one side of the lower coils, and the connecting wire is located between the lower coils and top coils and forms second inputs to enable selective supply of electricity through the first and second electrical inputs when the engine is powered, for both baking selecting the number of turns of the field winding.  2. The design according to claim 1, characterized in that the lower coils are wound first on the stator core, and the upper coils are wound on the outer sides of the lower coils to ensure efficient cooling of the upper coils.

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