KR20150003534A - Voltage and frequency changing apparatus using AC motor and AC generator - Google Patents

Voltage and frequency changing apparatus using AC motor and AC generator Download PDF

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Publication number
KR20150003534A
KR20150003534A KR1020130076531A KR20130076531A KR20150003534A KR 20150003534 A KR20150003534 A KR 20150003534A KR 1020130076531 A KR1020130076531 A KR 1020130076531A KR 20130076531 A KR20130076531 A KR 20130076531A KR 20150003534 A KR20150003534 A KR 20150003534A
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KR
South Korea
Prior art keywords
motor
generator
voltage
frequency
gear
Prior art date
Application number
KR1020130076531A
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Korean (ko)
Inventor
백승문
이현민
Original Assignee
주식회사 엘지화학
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Filing date
Publication date
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to KR1020130076531A priority Critical patent/KR20150003534A/en
Publication of KR20150003534A publication Critical patent/KR20150003534A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/20—Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters

Abstract

The present invention relates to an apparatus for changing the voltage and frequency using an AC motor and an AC generator. The AC motor and the AC generator are connected to each other to drive the AC generator through the rotation of the AC motor to change the voltage and frequency of the primary AC power. And more particularly to a voltage and frequency changing apparatus using an AC motor and an AC generator.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC motor and an AC generator,

The present invention relates to an apparatus for changing the voltage and frequency using an AC motor and an AC generator. The AC motor and the AC generator are connected to each other to drive the AC generator through the rotation of the AC motor to change the voltage and frequency of the primary AC power. And more particularly to a voltage and frequency changing apparatus using an AC motor and an AC generator.

More particularly, the present invention relates to a method and apparatus for physically connecting an AC motor to an AC generator and rotating the AC generator using the rotational force of the AC motor, And an AC motor for changing the frequency without an inverter and a voltage and frequency changing apparatus using the AC generator.

With the rapid development of industry and economy in recent years, the amount of electricity that enables such development has also increased.

On the other hand, such electricity exists in a DC state referred to as DC (direct current) and an AC state as AC (alternating current), and electronic devices use such DC current and AC current in various ways. Generally, the electricity transmitted from a power plant corresponds to an AC power source in an AC state. In order to change the voltage level of the AC power source, a transformer is generally used.

In addition, such an AC power source has a specific frequency value such as 60 Hz, 50 Hz, etc., and the motor or the electronic device of the secondary side is driven according to the frequency value. At this time, since frequency values required for driving may be different for each electronic device, the frequency value of the AC power source must be changed accordingly.

However, in order to change the frequency of the AC power source, conventionally, the frequency value is changed by converting the AC power source to DC power source by using an inverter and then changing it to the AC power source.

Such a conventional modification method is complicated in terms of circuitry, and requires a separate transformer and an inverter, thereby increasing the overall size.

In this method, the primary side and the secondary side are insulated using a separate insulating element (for example, an integrated circuit (IC) using a semiconductor, etc.) in the process of insulating the primary side AC power source and the secondary side AC power source. There is a problem that the conventional voltage and frequency changing circuit must be large enough to accommodate the insulating element.

In order to solve the problems of the conventional voltage and frequency changing circuit described above, the inventor of the present invention has proposed an AC circuit which can isolate the primary side and the secondary side without using a circuit- And a voltage and frequency changing device using a motor and an AC generator.

An object of the present invention is to provide a voltage and frequency changing apparatus using an AC motor and an AC generator. The AC motor and the AC generator are connected to each other, An AC motor for changing the voltage and frequency of the primary AC power source by driving the AC generator through the AC generator, and a voltage and frequency changing device using the AC generator.

More specifically, the present invention provides an AC motor capable of insulating a primary AC power supply and a secondary AC power supply without a separate insulation element, and a voltage and frequency changing apparatus using an AC generator.

In addition, the present invention provides an AC motor that can physically directly connect an AC motor to an AC motor and an AC generator, and a voltage and frequency changing device using the AC generator.

In addition, the present invention provides an AC motor and an AC generator for adjusting the voltage and current of the AC power by adjusting the gear ratio of the AC motor and the AC power generator.

The present invention also provides an apparatus for changing voltage and frequency using an AC motor and an AC generator according to a power supply specification of an AC power source.

The present invention also provides a voltage and frequency changing apparatus using an AC motor and an AC generator according to a power supply specification of an AC power source generated in a secondary side.

An apparatus for changing the voltage and frequency using an AC motor and an AC generator according to an embodiment of the present invention includes an AC motor rotated by receiving a voltage from an AC power source and an AC motor connected to the AC motor, Generating AC generator.

And the AC motor and the AC generator are connected to each other through a rotary shaft.

The AC motor may be provided according to a power supply specification of the AC power source to be applied.

The power supply specification may correspond to at least one of Voltage, Ampere, Frequency, and Power consumption.

The AC motor may provide a rotational force for rotating the rotation shaft.

The AC motor and the AC generator may be fastened to each other through the rotation shaft and one or more gears.

The AC motor and the AC generator can adjust a voltage and a current through gear ratios of the respective gears.

The AC motor and the AC generator may be engaged with each other through one or more gears.

The AC motor and the AC generator can adjust voltage and current through a gear ratio of one or more gears meshed with each other.

The AC generator may generate an isolated AC power through the rotational force of the AC motor.

The AC generator may change a voltage and a frequency value of the AC power supplied to the AC motor through the rotational force of the AC motor.

The AC generator may be provided according to a power source specification of the AC power source to be generated.

The power specification of the AC generator may correspond to at least one of Voltage, Ampere, Frequency, and Power consumption.

The AC motor and the AC generator are connected to each other via one or more belts and can rotate to correspond to each other.

The AC motor and the AC generator may correspond to a state insulated from each other.

The voltage and frequency changing device using the AC motor and the AC generator according to the embodiment of the present invention can prevent the voltage and frequency of the AC generator from being affected by the AC power source and the AC power source, .

thereafter. The present invention has the effect of reducing the overall size of the space occupied by the insulating element, thereby enabling miniaturization of the size.

In addition, since the gear ratio of the gear that connects the AC motor and the AC generator can be adjusted, the voltage and current of the primary AC power supply corresponding to the gear ratio can be controlled.

In addition, since the connection between the primary side AC power supply and the secondary side AC power supply is simplified in a circuit, the circuit can be designed easily.

FIG. 1 is a diagram showing a conventional voltage and frequency changing circuit 10. FIG.
2 is a diagram showing a configuration of a voltage and frequency changing apparatus 100 using an AC motor and an AC generator according to an embodiment of the present invention.
3 is a view showing a state in which the AC motor 110 and the AC generator 120 are connected to each other via the rotation shaft 130. FIG.
4 is a diagram showing a state where the AC motor 110 and the AC generator 120 are directly connected through the respective gears.
5 is a view showing a state in which the AC motor 110 and the AC generator 120 are connected through the belt 140. FIG.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

FIG. 1 shows a circuit of a conventional voltage and frequency changing circuit 10, FIG. 2 shows a configuration of a voltage and frequency changing apparatus 100 using an AC motor and an AC generator according to an embodiment of the present invention. Fig.

Referring to FIG. 1, a conventional voltage and frequency changing circuit 10 includes a transformer for changing a voltage level of a primary AC power source, In addition, one or more inverters are provided to change the frequency value of the primary AC power source.

Here, the transformer means a device that generates an induction current by using a magnetic field formed between a coil and an iron core while a current flows through a coil connected to the power source, and indirectly changes the magnitude of the voltage by using the induction current thus generated I can do it.

In addition, the inverter may mean a device used to convert DC power (DC power) into AC power (AC power). In the conventional voltage and frequency changing circuit 10, The AC power was changed to DC power, which was converted back to DC power via the inverter.

In the conventional voltage and frequency changing circuit 10, the primary side AC power source and the secondary side AC power source are insulated through a separate insulating material 11.

This insulating material 11 may mean covering or isolating the periphery of the conductive part with an insulating material (e.g., rubber) when electric power is normally conducted to an electronic device or an electric wire. May be formed of a material which does not cause deterioration even when exposed to high temperature and low temperature.

In FIG. 1, a diode is shown as an insulating material 11. The diode has an insulating region formed by reducing the number of free electrons and holes in a narrow space formed by joining a p-type semiconductor and an n-type semiconductor , The AC power source side (primary side) and the AC power source side (secondary side) are insulated.

Since the insulation process using such a diode uses the known technology, a detailed description will be omitted, and the conventional converter 10 must have an internal space for accommodating the insulation material 11, The overall size becomes large.

Referring to FIG. 2, a voltage and frequency changing apparatus 100 using an AC motor and an AC generator and an AC motor 110 and an AC Generator 120 as shown in FIG.

The AC motor 110 is also referred to as an alternating-current motor. The AC motor 110 rotates by receiving power from an AC power source and rotates a shaft of an AC generator 120, which will be described later.

The AC motor 110 that performs this role may basically be composed of an external stator and an internal rotor. An internal rotor of the AC motor 110, which is externally supplied with AC power, is rotated by an induction current, and a motor gear 111 may be formed at a distal end of the internal rotor.

The motor gear 111 is fixed to the inner rotor of the AC motor 110 without being separated from the inner rotor and is rotated in correspondence with the inner rotor to directly engage with the generator gear 121 of the AC generator 120, Or rotate the rotating shaft 130 directly with the rotating shaft gear 131 formed on the rotating shaft 130, which will be described later.

The AC motor 110 rotates the internal rotor through a torque generated by the induction current. In the case of a small motor, a short-circuited winding is formed by winding a short-circuited winding several times. In the case of a large motor, The winding can be formed by winding a plurality of times.

The AC motor 110 may be classified into an induction motor, a synchronous motor, a commutator motor, and the like according to the type of the rotor. As long as the AC motor 110 performs the above- It should be noted that the type and size are not limited.

In one embodiment, such an AC motor 110 may be provided according to the power supply specifications of the AC power source to be applied. In other words, the AC motor 110 may be provided in the voltage and frequency varying apparatus 100 using the AC motor and the AC generator according to the power specification of the AC power source.

Here, the power supply specification may refer to a specification including voltage, current, frequency, power consumption, etc., and a voltage of the AC power supply may be supplied to the AC motor 110 , The AC motor 110 may not be driven properly. Therefore, the AC motor 110 may be selectively changed according to the power supply specification of the AC power source. Therefore, although the AC power source is variously applied, the AC motor 110 can be selected by the user to correspond to the AC power source.

For example, when the applied voltage of the AC power source is 110v, the AC motor 110 may be changed to 110v, and when the applied voltage is 220v, the AC motor 110 may be changed to 220v.

It should be noted that the AC motor 110 is not limited to 110v and 220v, and may be changed at any time according to a variety of voltage values.

Next, the AC generator 120 rotates according to the AC motor 110 to generate an insulated AC power source, and also changes the voltage magnitude of the primary AC power. At the same time, the primary AC power It is also possible to change the frequency value of the frequency.

Here, it is generally difficult to control the rotation speed of the motor rotating at a speed of 60 Hz to 1750 rpm in the AC power supply causing the AC voltage. This is because, in order to change the frequency value of the DC current, it is necessary to convert it to a DC power source, then use it to change the frequency value, and then convert it back to the AC power source.

Therefore, in order to change the frequency value of the DC current, the inverter can perform the function of sequentially transmitting the + DC power and the - pole of the DC current to be transmitted, so that the conventional voltage and frequency changing circuit 10), the inverter was used.

Meanwhile, the AC generator 120, which performs this role, may be composed of an external stator and an internal rotor internally, like the AC motor 110 described above, and the motor gear 111 An engaging generator gear 121 may be formed.

The generator gear 121 formed at the distal end of the inner rotor is engaged with the motor gear 111 and rotates rapidly while rotating the inner rotor. At this time, the rotation of the inner rotor is provided in the AC generator 120 The magnetic flux is cut off by the coil (the conductor wound by the winding), and the generated electromotive force is released to the outside, and the electromotive force may correspond to the AC power.

The generator gear 121 formed at the distal end of this inner rotor can be directly engaged with the motor gear 111 or can be directly engaged with the rotation shaft gear 131 described later.

Also, the AC generator 120 may be provided in accordance with a power source specification of the generated AC power source, like the AC motor 110. In other words, the AC generator 120 may be provided in the voltage and frequency changer 100 using the AC motor and the AC generator according to the selected AC power source. Thus, although the AC power source varies in various ways, the AC generator 120 may be selected by the user to correspond to the AC power source.

Here, the power supply specification is the same as that described above in the AC motor 110, and a description thereof will be omitted.

The AC generator 120 may be connected to the AC motor 110 in a variety of ways (physical manner), since the AC generator 120 uses a known technique, and a detailed description thereof will be omitted. , Which will be described in more detail with reference to FIG.

3 is a view showing a state in which the AC motor 110 and the AC generator 120 are connected to each other through the rotary shaft 130. FIG 4 is a view showing the AC motor 110 and the AC generator 120 through the respective gears FIG. 5 is a view showing a state where the AC motor 110 and the AC generator 120 are connected to each other through the belt 140. FIG.

3, the AC motor 110 and the AC generator 120 may be connected to each other through a rotation shaft 130. The AC motor 110 and the AC generator 120 may be connected to each other through a rotation shaft 130, At least one rotary shaft gear 131 may be provided.

When the AC motor 110 is rotated in the clockwise direction or the counterclockwise direction by the AC power supply according to the connection state, the rotation shaft gear 131 engaged with the motor gear 111 rotates, and the rotation shaft 130 rotates And the AC generator 120 is driven by the rotation of the generator gear 121 meshed with the rotation axis gear 131. [

Since the configuration of the voltage and frequency changing apparatus 100 using the AC motor and the AC generator requires no separate insulating element, if the rotating shaft 130 is connected to the central portion, the size of the primary AC power and the secondary AC power can be reduced . Since the physical rotational force of the AC motor 110 is directly transmitted to the AC generator 120 without loss, it can be also excellent in energy efficiency.

4, the AC motor 110 and the AC generator 120 may be directly engaged and connected through the motor gear 111 and the generator gear 121, respectively, The distance of the AC generator 120 can be shortened or the size of the voltage and frequency changer 100 using the AC motor and the AC generator can be further reduced.

3, since the motor gear 111 and the generator gear 121 are directly connected to each other, the rotational force generated when the AC motor 110 rotates at a high speed is smaller than the rotational force generated when the AC motor 110 rotates at high speed. And can be easily transmitted to the AC generator 120. [

Since the AC motor 110 and the AC generator 120 are rotated through the gears, the voltage and current of the generated primary AC power can be adjusted by adjusting the gear ratio of the gear.

For example, when the motor gear 111 of the AC motor 110 connected to the AC power source side is constituted by a gear smaller than the generator gear 121, since the AC motor 110 rotates rapidly, the AC generator 120 The AC motor 110 rotates more slowly so that the AC motor 110 can be rotated faster and the AC voltage 110 of the AC motor 110 can be generated with a larger gear than the generator gear 121. [ Therefore, the AC generator 120 can generate a low voltage AC voltage.

5, the inner rotor of the AC motor 110 and the AC generator 120 are oriented in the same direction, and the motor gear 111 and the generator gear 121 are formed at the distal ends of the inner rotors, respectively. .

The motor gear 111 and the generator gear 121 are connected through a separate belt 140 rather than directly engaged.

Here, the belt 140 is interpreted in a meaning corresponding to a timing belt connecting a timing gear mounted on a crankshaft of an engine to a timing gear mounted on a camshaft of an automobile engine .

With such a configuration, the motor gear 111 and the generator gear 121 can rotate in the same direction, and can be configured to have a higher energy efficiency than the energy efficiency shown in FIG. 3 and FIG.

3 and 4 show that the frictional force generated when the protrusions of the motor gear 111, the generator gear 121 and the rotary shaft gear 131 contact with each other due to the fact that the plurality of gears are directly engaged, 5, the energy efficiency may not be canceled because such a frictional force does not exist.

In one embodiment, protrusions protruding at regular intervals may be formed on the inner surface of the belt 140, that is, the surfaces that contact the motor gear 111 and the generator gear 121.

Here, the protrusions protruding at regular intervals may mean a concavo-convex structure formed on the inner surface, such as a timing belt of an automobile engine. These protrusions may be protrusions formed on the motor gear 111 and the protrusions formed on the generator gear 121 May be formed to correspond to the generation interval. As a result, the belt 140 can be engaged with the motor gear 111 and the generator gear 121 without separation, and the rotational force of the AC motor 110 can be transmitted to the AC generator 120 as it is. 110 and the AC generator 120 can be prevented from being idle.

As described above, the voltage and frequency changing apparatus 100 using the AC motor and the AC generator according to the present invention can be connected to the AC and AC generator through the physical connection (the rotating shaft 130 or the belt 140) It is possible to connect the motor 110 and the AC generator 120 and to simplify the circuit in comparison with the conventional converter 10 using the insulating element 11, The overall size can be reduced as compared with the frequency changing circuit 10. [ In addition, the voltage and current of the primary AC power can be changed without a separate transformer, and the frequency value of the primary AC power can be changed without a separate inverter.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as limitations. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Conventional voltage and frequency changing circuit
11: Insulation material
100: Voltage and frequency change device using AC motor and AC generator
110: AC generator
111: Motor gear
120: AC generator
121: generator gear
130:
131:
140: Belt

Claims (14)

An AC motor rotated by receiving a voltage from an AC power supply; And
And an AC generator connected to the AC motor and rotated to generate an AC power corresponding to the AC motor,
Wherein the AC motor and the AC generator are connected to each other via a rotary shaft.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
The AC motor includes:
Wherein the power supply unit is provided in accordance with a power supply specification of the AC power source to be supplied.
Voltage and frequency change device using AC motor and AC generator.
3. The method of claim 2,
In the power supply specification,
Wherein the power consumption is one or more of a voltage, a current, an ampere, a frequency, and a power consumption.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
The AC motor includes:
And a rotating force for rotating the rotating shaft is provided.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
Wherein the AC motor and the AC generator are connected in series,
Wherein the first and second gears are engaged with each other through the at least one gear and the rotary shaft.
Voltage and frequency change device using AC motor and AC generator.
6. The method of claim 5,
Wherein the AC motor and the AC generator are connected in series,
Wherein a voltage and a current are controlled through a gear ratio of each of the gears.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
Wherein each of the AC motor and the AC generator includes:
And are engaged with each other through at least one gear.
Voltage and frequency change device using AC motor and AC generator.
8. The method of claim 7,
Wherein the AC motor and the AC generator are connected in series,
Wherein a voltage and a current are controlled through a gear ratio of each of the gears.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
The AC generator includes:
And generates an AC power source insulated by the rotational force of the AC motor.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
The AC generator includes:
And changing the voltage and the frequency value of the AC power applied to the AC motor through the rotational force of the AC motor.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
The AC generator includes:
Wherein the power supply is provided according to a power supply specification of the AC power source to be generated.
Voltage and frequency change device using AC motor and AC generator.
12. The method of claim 11,
In the power supply specification,
Wherein the power consumption is one or more of a voltage, a current, an ampere, a frequency, and a power consumption.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
Wherein the AC motor and the AC generator are connected in series,
Are connected to each other via one or more belts and rotate to correspond to each other.
Voltage and frequency change device using AC motor and AC generator.
The method according to claim 1,
Wherein the AC motor and the AC generator are connected in series,
Wherein the first electrode and the second electrode are insulated from each other.
Voltage and frequency change device using AC motor and AC generator.
KR1020130076531A 2013-07-01 2013-07-01 Voltage and frequency changing apparatus using AC motor and AC generator KR20150003534A (en)

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Application Number Priority Date Filing Date Title
KR1020130076531A KR20150003534A (en) 2013-07-01 2013-07-01 Voltage and frequency changing apparatus using AC motor and AC generator

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Application Number Priority Date Filing Date Title
KR1020130076531A KR20150003534A (en) 2013-07-01 2013-07-01 Voltage and frequency changing apparatus using AC motor and AC generator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3001710A1 (en) 2014-09-25 2016-03-30 LG Electronics Inc. Method and apparatus for receiving signal of neighboring cell signal by d2d terminal in wireless communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3001710A1 (en) 2014-09-25 2016-03-30 LG Electronics Inc. Method and apparatus for receiving signal of neighboring cell signal by d2d terminal in wireless communication system

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