KR100796783B1 - A power system using multiple primary winding contactless transformer and the control method thereof - Google Patents

Abstract

The present invention relates to a contactless power transmission system, the present invention,

In constructing a power supply system for supplying power in a non-contact manner using the principle of a linear induction transformer to a mobile load,

First, the primary and primary track windings of the linear induction transformer are composed of multiples, and the primary and primary track windings can be combined with the secondary pick-up core and the secondary pickup winding in a multiple manner. Efficient coupling between track winding and secondary pickup winding improves electromagnetic coupling characteristics and reduces unnecessary magnetoresistance.

Secondly, an inverter is installed at the front end of the primary track winding, and a resonant frequency tracking monitor is additionally arranged between the rear end and the front end of the inverter so that the resonance frequency tracking monitor outputs the resonance frequency output from the rear end of the inverter. By tracking and monitoring in real time to readjust the phase difference, it is fed back to the front of the inverter to provide it.

Due to the influence of the secondary winding moving along the moving load, it is possible to automatically adjust the switching frequency (adjusting the resonance point) to the resonant frequency that changes frequently, so that zero current switching can always be performed despite the change of the resonance frequency. At the same time, there is a feature that the loss caused by the mismatch of the phase of the switching frequency and the resonance frequency can be minimized.

Multi winding, non-contact power transmission system, resonant frequency tracking and monitoring system, resonance point, track, track winding, pickup core, pickup winding, phase comparison, switching frequency, linear induction transformer, air gap, magnetoresistance

Description

A power system using multiple primary winding contactless transformer and the control method

1 is a coupling structure diagram of a pantograph collector

2 is a block diagram of a conventional non-contact power transmission system

3 is a block diagram of a conventional contactless power transmission system.

4 is an equivalent model of a general linear transformer

5 is an equivalent circuit model of a general linear transformer

6 is a configuration diagram of a contactless power transmission system providing an environment to which the present invention can be applied.

7 is a result of calculating the inductance changed according to the change of the primary and secondary winding positions

8 is a schematic block diagram of a contactless power transmission system according to the present invention;

9 is a detailed block diagram of a contactless power transmission system according to the present invention.

Fig. 10 is an apparatus diagram to which simulation conditions of the present invention are added (all)

11 is an apparatus diagram to which the simulation condition of the present invention is added (primary and secondary winding)

Explanation of symbols on the main parts of the drawings

10 Inverter 20 Primary Track

30 Primary track winding 40 Primary void

50 2nd Pickup Right 60 2nd Pickup Core

70 Secondary air gap 80 converter

100 Inverter 200 Primary Track Core

300 1st track winding 400 1st air gap

500 2nd Pickup Winding 600 2nd Pickup Core

700 secondary air gap 800 converter

900 Resonant Frequency Tracking Monitor

910 Zero Crossing Section

920 Phase Comparison Unit 930 Loop Filter Unit

940 Voltage Controlled Oscillator 950 Gate Drive

Electrical and electronic devices refer to devices operated using electricity as an energy source.

In order to operate an electric and electronic device, the supply of the energy source electric power required to operate the device is necessary, and the supply of the electric power must be supplied from the outside unless the device itself generates and procures itself.

Therefore, in order for the electric / electronic device to be supplied with power from the outside, power transmission means for transmitting power from an external power supply facility to the device is necessary.

When the electric and electronic devices are classified according to the movement of the device, the electric and electronic devices can be divided into fixed electric and electronic devices and mobile electric and electronic devices. Stationary electric and electronic devices refer to electric and electronic devices that are fixed and installed in a certain place and operate. Mobile electric and electronic devices refer to electric and electronic devices that operate while the device moves from time to time.

On the other hand, when looking at the difficulty of supplying power to the electrical and electronic device,

Fixed electric and electronic devices have no problem in power supply because they are supplied in a floating state by surface contact (fixed surface contact method) such as a switch at a certain place.

In the case of mobile electric and electronic devices that move relatively short distance and consume low power, it is easy to solve the problem of power supply because it is possible to supply power to the mobile load by using electric wire or power storage battery. ,

In the case of mobile electric and electronic devices that consume a large amount of power while constantly moving over a long distance, a lot of problems arise in the power transmission system because the load must be constantly moved and receive a large amount of power.

For example, in the case of a mobile load that consumes a large amount of power while continuously moving on a monorail or an electric railway such as an electric locomotive or an electric vehicle, a powered mobile load (eg, an electric locomotive or an electric vehicle) itself continuously moves For this reason, it is impossible to be supplied with a fixed surface contact method like fixed electric and electronic devices, and it is impossible to replace commercial power with a storage battery because the scale of power used is very large.

For this reason, when supplying power to a constantly moving mobile load such as an electric vehicle (electric locomotive or electric vehicle, etc.), a special current collector called a pantograph is interposed between a power supply line (power line) and a power supply device, and a surface between the power supply line and the pantograph is provided. Power is supplied to the moving load through the contact (moving surface contact method). (See Figure 1)

However, supplying power to a load moving at high speed by the moving surface contact method as described above has the following problems.

① Electrical contact in the moving state increases the electrical resistance of the contacts, causing waste of power by overheating the contacts by Joule heat.

② It is difficult to keep the feeder level, so if the moving load moves at a high speed, repeated interruption phenomenon occurs between the pantograph and feeder line of the electric vehicle. It causes a large power accident such as disconnection.

③ While the width of the pantograph is limited, the width of the pantograph that flows due to external force becomes larger, which causes the pantograph to deviate from the feeder line, which causes the accident that the supply of power is interrupted. At the same time, the instability of the power supply system increases.

(4) The frictional heat generated between the feeder and the pantograph causes not only the wear of the feeder and the pantograph to be severe, but also the power line that is placed in the air harms the environment and aesthetics, and a lot of initial investment is required to construct the feeder.

In order to improve the problems of the mobile surface contact method as described above, a non-contact power transmission system has recently been developed and partially utilized.

In the non-contact power transmission system, the electric power applied to the primary track winding 30 in the state where the primary and the secondary are separated by the air gap is transmitted to the secondary pickup winding 50 by the electromagnetic induction phenomenon according to Ampere and Faraday law. The principle of linear induction transformer is used in power transmission system.

In more detail, the contactless power transmission system,

The primary track 20 and the secondary pick-up core 60 are separated by voids, and the windings are wound around the primary track 20 and the secondary pick-up core 60, respectively, and then the primary track winding 30 When a high frequency current of several tens of KHz is applied to the primary track winding 30, the primary current corresponding to the frequency flows alternately, and the alternating magnetic flux generated by the primary alternating current flows in the primary track (20). ) And a linear induction transformer that applies an induced current to the secondary pickup winding (50) while flowing through the secondary pickup core (60) and flows through the secondary pickup winding (50).

By using the electromagnetic induction phenomenon to transfer the energy applied to the primary track winding (30) to the secondary pickup winding (50) by a non-contact method, a power transmission system that can eliminate mechanical contact in the power delivery system Say.

According to the above principle, since the primary track winding 30 and the secondary pick-up winding 50 can be spatially separated, power can be supplied to a moving load without using a direct surface contact method. Many problems with the method can be solved at once.

Conventional Technology

However, despite the many advantages described above, the existing contactless power transmission system is not currently widely used in mobile electric and electronic devices.

The reason is that the conventional contactless power transmission system has the following problems, which hinders its practical use.

The contactless power transmission system that is currently being developed and utilized can be described in two ways.

Conventional Technology 1

First, the prior art 1 will be described with reference to FIGS. 2 and 3.

FIG. 2 is an external configuration diagram of a conventional contactless power transmission system, and FIG. 3 is a block diagram showing the configuration of FIG.

Conventional contactless power transmission system,

An inverter installed at the front end of the primary track winding 30, rectifying the supplied commercial power to DC, and switching the inverter to convert it into a high frequency of tens of khz to supply the primary track winding 30 to the primary track winding 30. 10;

In a state in which it is installed along a moving path of a moving electric vehicle (moving load), the primary track winding 30 is wound and supported, while the magnetic flux guides the flow of alternating magnetic flux generated by the primary track winding 30. A primary track 20 for performing a function;

A primary track winding (30) for generating magnetic flux by receiving an alternating current supplied from the inverter (10) while being wound and supported around the primary track (20);

A primary air gap 40 formed in the center of the primary track 20 to perform a function of a passage through which the secondary pick-up core 60 moves;

The alternating magnetic flux generated by the alternating current flowing through the primary track winding 30 is moved while moving along the primary gap 40 together with the moving vehicle in a state of being wound and supported by the secondary pick-up core 60. A secondary pick-up winding 50 which induces electromotive force necessary for a mobile load;

The secondary pickup winding 50 is attached to the moving vehicle in a state in which the secondary pickup winding 50 is wound and supported so that the secondary pickup winding 50 may continue to bridge the magnetic flux while moving along the primary gap 40 together with the moving vehicle. On the other hand, the secondary pick-up core 60 to perform a function as a magnetic inducing flow of the alternating magnetic flux generated by the primary track winding 30;

Secondary pores 70 formed on both sides of the center of the secondary pick-up core 60 to perform a function of a passage through which the primary track core 20 moves;

A converter (80) for converting the electromotive force induced in the secondary pickup winding (50) into electric power required for a moving load;

It is composed.

Here, the primary track 20 mainly performs the function of supporting the primary track winding 30, rather than functioning as a core serving as a passage of the magnetic flux, and the primary track winding 30 is an air core coil. It is common to perform mainly the function of generating magnetic flux in the form of.

Referring to the operation of the conventional contactless power transmission system configured as described above,

First, the commercial power supplied from the outside is rectified to DC in the inverter 10, and then switched again to be converted to a desired high frequency.

When the power converted by the high frequency in the inverter 10 is pressed at both ends of the primary track winding 30, the primary current flows alternately as much as the frequency corresponding to the primary track winding 30. Accordingly, alternating magnetic flux corresponding to the frequency is generated around the primary track winding 30.

The alternating flux flows through the first track 20, the first air gap 40, and the second air gap 70 to the second pick-up core 60, and is connected with the second pick-up coil as many times as the frequency. .

When the alternating flux is interlinked with the secondary pick-up coil, electromotive force is induced in the secondary pick-up coil by the electromagnetic induction phenomenon, and the electromotive force induced by the secondary pick-up coil is converted into the power required by the mobile load through the converter 80. To be supplied to the moving load.

Although not shown here, the mobile load is a generic term for all electrical equipment used for driving, controlling, lighting and backup power of the vehicle.

In the non-contact power supply system, since the primary track winding 30 and the secondary pickup winding 50 can be separated by the air gap according to the above principle, it is possible to supply power to a load moving in a non-contact manner.

As mentioned above, the non-contact power supply method as described above is an innovative method that can solve many problems of the conventional contact power supply method described above. Nevertheless, the technology is currently only partially used on vehicles that run at very low speeds (from tens of meters to hundreds of meters), and is not widely used in general track vehicles. This is because the existing contactless power supply method has the following problems.

① As described above, in order to supply power to a mobile load in a non-contact manner by using the principle of a linear induction transformer having air gaps, air gaps are inevitably present between the primary track 20 and the secondary pick-up core 60. There is no choice but to. However, this void acts as a factor to increase the magnetoresistance because it hinders the flow of magnetic flux.

② In addition, the secondary side of the linear induction transformer must supply constant power to the moving load stably. To this end, the first track 20 has to increase its length in order to reduce the change in mutual inductance on the secondary pick-up winding 50 as much as possible due to the nature of the electron induction. B) the secondary pickup winding 50 may take a structure that couples only to a portion of the primary track 20 or the primary track winding 30. As a result, a significant asymmetry of the lengths of the primary track winding 30 and the primary track core 20 and the secondary pickup winding 50 and the secondary pickup core 60 is achieved. This results in an increase in the overall pore size, which in turn increases the magnetoresistance.

In general, the linear induction transformer generally used may be represented as shown in FIG. 4, and the equivalent circuit model may be represented as shown in FIG. 5. The parameters for the equivalent circuit model may be represented by the following equation. Can be represented as:

(01)

(01)

: 자기저항

: Magnetoresistance

: 철심의 자기저항

: Magnetoresistance of iron core

공극의 자기저항

Magnetoresistance of air gap

: 철심 자로의 길이

Length of core

: 철심자로의 단면적

: Cross section of core

: 공극의 길이

: Length of void

: 공극의 단면적

: Cross section of air gap

In the above equation, as the gap increases and the length of the core increases, the magnetoresistance increases.

The results of ① and ② above (increasing the magnetoresistance due to the increase of the air gap) inhibit the flow of the magnetic flux, which results in a significant decrease in the energy transfer efficiency of the conventional non-contact power supply system.

③ In addition, as the length of the primary track 20 becomes longer as described above, the length of the primary track winding 30 also becomes longer, and thus the magnetization current flowing through the primary track winding 30 becomes unnecessarily large. In the primary track winding 30, energy loss due to a large amount of joule heat occurs.

④ Also, as mentioned above, the second pick-up core 60 and the second pick-up winding 50 take the form of being coupled to only part of the first track 20 and the first track winding 30, and thus The primary track winding 30 and the secondary pick-up winding (50) is a part where the leakage flux is generated in a portion that is not coupled in close proximity spatially causes a problem that the energy transfer efficiency is greatly reduced.

Conventional Technology 2

① On the other hand, in order to solve the problem of deterioration of energy transfer efficiency caused by the same reason as the above ②, ③, ④ caused by the mismatch of the length of the primary track 20 and the secondary pick-up core 60, the primary track ( 20) and the length of the primary track winding 30 and the length of the secondary pick-up core 60 and the secondary pick-up winding 50 to be the same as shown in Figure 6 primary track 20 and primary The track winding 30 can be found.

However, if the length of the primary track 20 and the secondary pick-up core 60 is the same as above, the secondary pick-up core 60 and the secondary pick-up winding 50 attached to the moving load are moved together with the moving load. When moving, the coupling characteristics acting between the secondary pick-up core 60 and the secondary pickup winding 50 and the primary track 20 and the primary track winding 30 are changed in real time. 1. The change in the coupling characteristics between the secondary will continuously change the mutual inductance between the primary track winding 30 and the secondary pickup winding 50, which in turn results in the primary track winding 30 and the secondary pickup winding. The magnetic inductance by (50) also causes the problem of continuously changing.

In other words, the secondary pick-up core 60 is always connected to the two primary tracks 20 except for a specific time point in which the primary track 20 and the secondary pick-up core 60 are exactly matched while the moving load is moving. At the same time, the mutual inductance of the primary track 20 and the secondary pick-up core 60 is continuously changed because the moving state continuously changes to the coupling characteristic.

(2) In addition, since the secondary pick-up winding 50 of the linear induction transformer moves with the moving load, even if it moves precisely along the track, the coupling coefficient is continuously changed due to construction error or vibration. As a result, mutual inductance often changes.

For the same reasons as ① and ② above, the inductance parameter is constantly changing.

Here, 1. The reason why the inductance parameter changes between the 2nd order can be confirmed by the following equation.

(02)

(02)

(03)

(03)

(04)

(04)

(05)

(05)

이므로here

Because of

(06)

(06)

(07)

(07)

In the above equation, when the secondary pick-up core 60 and the secondary pickup winding 50 move together with the movement of the moving load, it can be seen that the inductance also changes accordingly.

Figure 7 is a table showing the result of calculating the change in inductance according to the position of the 1. secondary winding by the above equation.

③ Meanwhile, in order to smoothly perform the inverting in the inverter 10, first, after rectifying commercial power in the inverter 10, the inverter 10 should be switched again. At this time, if you want to cut off the voltage (or current) for each cycle, in order to minimize the loss of power, the switch should be made at the point where the value of voltage or current becomes zero.

On the other hand, the following equation shows that the reactance in the series resonance circuit is zero at the resonance frequency.

(08)

(08)

Therefore, it can be seen that switching should be performed at the resonance frequency in order to minimize the loss of power.

But here the resonant frequency is

(09)

(09)

Given that it is calculated by

As described above, as the moving load moves, the coupling characteristics of the primary track winding 30 and the secondary pickup winding 50 change from time to time, and thus the mutual inductance changes from time to time. We can see that it leads to

Accordingly, although the switching of the inverter 10 should be made at the time when the value of the voltage (or current) becomes 0, the voltage (or current) at a point having a certain value without actually blocking the voltage (or current) at the resonance point Is causing problems that will block.

This problem causes a large amount of energy conversion loss during the switching operation of the inverter 10, which not only degrades the energy conversion efficiency but also makes the electromotive force induced in the secondary very unstable, thereby lowering the efficiency of the overall system. As a result, it becomes a cause of making it impossible to construct the primary track winding 30 in a multiple manner, which can be seen as a reason for delaying its practical use.

The present invention has been made to solve the above problems,

The purpose of the present invention,

In constructing a power supply system for supplying power in a non-contact manner using the principle of a linear induction transformer to a mobile load,

First, the primary track 200 and the primary track winding 300 of the linear induction transformer are configured in multiple, and the primary track 200 and the primary track winding 300 are multiplexed in the secondary pick-up core 600. ) And secondary pick-up winding 500 to achieve efficient coupling between the primary track winding 300 and the secondary pick-up winding 500 to improve electromagnetic coupling characteristics and to eliminate unnecessary magnetoresistance. To reduce,

Second, the inverter 100 is installed at the front end of the primary track winding 300, and the resonance frequency tracking and monitoring unit 900 is additionally arranged between the rear end and the front end of the inverter 100 to configure the resonance frequency. By tracking and monitoring the resonant frequency output from the rear end of the inverter 100 in real time by the tracking and monitoring unit 900 to readjust the phase difference, and then fed back to the front end of the inverter 100,

Due to the influence of the secondary pick-up winding 500 moving along the moving load, the switching frequency can be automatically adjusted (adjusting the resonance point) according to the resonant frequency that changes frequently, so that the current is always 0 despite the change of the resonant frequency. In addition to the switching can be achieved, the occurrence of arc due to the mismatch of the phase of the switching frequency and the resonance frequency can be minimized.

The configuration and working relationship of the present invention for achieving the above object will be described with reference to FIGS. 8 and 9.

The composition of the present invention,

It is installed at the front end of the primary track winding 300, rectifies the supplied commercial power into direct current and converts it into a high frequency of 25khz to 50khz and supplies it to the primary track winding 300, but the resonance frequency output from the rear end ( An inductance value to the resonant frequency tracking and monitoring unit 900, and always performs a zero current switching operation in accordance with the gate drive signal provided from the resonant frequency tracking and monitoring unit 900 to perform a lossless inverting operation. 100);

After monitoring the value of the resonant frequency (inductance) provided from the rear end of the inverter 100 to compare and check the phase of the resonant frequency and then oscillating a gate drive signal capable of zero current switching to provide to the front end of the inverter 100 A resonance frequency tracking and monitoring unit 900;

In the state of being installed in multiple directions along the moving path of the moving vehicle (moving load), the multiplexed primary track winding 300 is wound and supported while inducing the flow of the alternating flux generated by the primary track winding 300. A plurality of primary tracks 200 which perform a function as a ruler but whose length is the same as the length of the secondary pick-up core 600;

While receiving the alternating current supplied from the inverter 100 in a state of being wound around and supported by the primary track 200, the alternating magnetic flux is generated, and the length of the longitudinal cross section thereof is the secondary pick-up winding ( A primary track winding 300 formed equal to the length of the longitudinal cross section of 500;

A primary air gap 400 formed in the center of the primary track 200 and performing a function of a passage through which the secondary pick-up core 600 moves;

The electromotive force required for the moving load by moving the alternating magnetic flux generated from the primary track winding 300 while moving along the primary gap 400 with the moving vehicle while being wound and supported around the secondary pick-up core 600. A second pick-up winding 500 for inducing organic;

The secondary pick-up winding 500 may continue to intersect the alternating magnetic flux while being attached to the moving vehicle while supporting the secondary pick-up winding 500 and moving along the primary gap 400 with the moving vehicle. On the other hand, the secondary pick-up core (600) to perform a function as a path to induce the flow of the alternating flux generated by the primary track winding (300);

Secondary voids 700 formed on both sides of the center of the secondary pick-up core 600 to perform a function of a passage through which the primary track 200 moves;

A converter 800 that converts the electromotive force induced in the secondary pickup winding 500 into power required for a mobile load and supplies the converted electromotive force;

Characterized in that configured.

The resonance frequency tracking and monitoring unit 900 is again,

A zero crossing unit 910 which constantly monitors the value of the resonance current supplied from the inverter 100 to the primary track winding 300 to detect a time point at which the current value is 0, and then provides it to the phase comparator 920. (zerocrossing unit);

Detects the changed resonant frequency and its phase based on the value of the zero current changed in real time provided from the zero crossing unit 910, and obtains the phase difference by comparing it with the phase of the oscillation signal provided from the voltage controlled oscillator 940, A phase comparison unit 920 for calculating a phase transfer function by calculating the changed phase and then providing the phase transfer function to the loop filter;

A loop filter unit 930 for integrating the phase transfer function provided from the phase comparator 920 and providing the voltage transfer oscillator 940 to the voltage control oscillator 940;

A voltage controlled oscillator 940 for oscillating a new frequency changed according to the resonant frequency changed according to the phase signal provided from the loop filter unit 930 and outputting the oscillated signal to the phase comparator 920 and the gate drive;

A gate drive unit 950 for outputting a gate signal capable of zero current switching to the inverter 100 according to the signal provided from the voltage oscillation control unit;

Characterized in that configured.

Referring to the operation of the contactless power transmission system according to the present invention configured as described above are as follows.

First, the commercial power supplied from the outside is rectified to primary DC in the inverter 100, and then converted to a desired high frequency through a switching process. The high frequency converted here is usually 25khz to 50khz.

When the power converted to the high frequency in the inverter 100 is pressed at both ends of the primary track winding 300, the primary current flows alternately as much as the frequency corresponding to the primary track winding 300. The corresponding alternating magnetic flux is generated around the primary track winding 300.

The alternating magnetic flux flows through the primary track 200 and the primary and secondary voids 700 to the secondary pick-up core 600, and is interlinked with the secondary pick-up coil by the number of times corresponding to the frequency.

When the alternating magnetic flux is interlinked with the secondary pick-up coil, electromotive force is induced in the secondary pick-up coil by the electromagnetic induction phenomenon, and the electromotive force induced by the secondary pick-up coil is converted into the power required by the converter 800 in the mobile load. It is supplied to the moving load.

The procedure so far is the same as in the prior art.

At this time, when the secondary load winding 500 moves along the primary load 200 on which the primary track winding 300 is installed, the primary track winding 300 and the secondary pickup winding ( The coupling condition of 500 is changed.

Accordingly, as described above, the mutual inductance is changed, and also the inductance of the primary track winding 300 is changed, and at the same time, the resonance frequency is also changed.

Meanwhile, the zero crossing unit 910 of the resonance frequency tracking and monitoring unit 900 detects a point in time at which the value of the resonance current becomes zero while monitoring and monitoring the change in the resonance current value of the primary track winding 300 in real time. The phase comparison unit 920 is sent.

Subsequently, the phase comparator 920 detects the changed resonant frequency and its phase based on the changed zero current value provided from the zero crossing unit 910 in real time, and the phase of the oscillation signal provided from the voltage controlled oscillator 940. The phase difference is calculated by comparing the phase difference, the phase shift function is calculated by calculating the changed phase, and then provided to the loop filter.

Next, the loop filter unit 930 receiving the phase transfer function of the resonance current from the phase comparator 920 integrates the value and provides the result to the voltage controlled oscillator 940.

Subsequently, the voltage oscillation control unit oscillates a new frequency changed according to the resonant frequency changed according to the phase signal provided from the loop filter unit 930, and outputs the oscillation signal to the gate drive so that the gate drive unit 950 switches 0 current. While outputting a gate signal capable of outputting the same, the oscillation signal is sent to the phase comparator 920 so that the phase can be continuously compared.

On the other hand, the gate drive unit 950 receiving the oscillation signal for zero current switching from the voltage controlled oscillator 940 provides a gate signal in response to the oscillation signal to the front end of the inverter 100, the inverter 100 is zero current Enable switching.

Subsequently, the inverter 100 receiving the gate signal from the gate drive unit 950 performs a switching operation according to the continuously changed resonance frequency by blocking the zero current according to the gate signal.

10, which is not described above, is an overall view of a device to which the simulation condition of the present invention is added, and FIG. 11 is a device diagram of the primary and secondary windings to which the simulation condition of the present invention is added.

According to the present invention configured as described above,

By drastically improving the power transmission efficiency of the contactless power transmission system, there is an effect of promoting the practical use and activation of the contactless power transmission system, which has not been activated until now due to the problem of power efficiency.

In addition, this reduces the initial construction investment cost of light rail and triggers social demand for it, thereby solving the difficulties of urban transportation.

Claims (6)

It is installed in the front of the primary track winding 300, rectifies the supplied commercial power to DC and converts it into high frequency of 25khz to 50khz and supplies it to the primary track winding 300, but the resonance frequency (inductance) output from the rear end ) Is provided to the resonant frequency tracking and monitoring unit 900, and the inverter 100 performs a lossless inverting operation by always performing zero current switching operation in accordance with the gate drive signal provided from the resonant frequency tracking and monitoring unit 900. )Wow; After monitoring the value of the resonant frequency (inductance) provided from the rear end of the inverter 100 to compare and check the phase of the resonant frequency and then oscillating a gate drive signal capable of zero current switching to provide to the front end of the inverter 100 A resonance frequency tracking and monitoring unit 900; In the state of being installed in multiple directions along the moving path of the moving vehicle (moving load), the multiplexed primary track winding 300 is wound and supported while inducing the flow of the alternating flux generated by the primary track winding 300. A plurality of primary tracks 200 which perform a function as a ruler but whose length is the same as the length of the secondary pick-up core 600; While receiving the alternating current supplied from the inverter 100 while being wound and supported around the primary track 200 to perform an alternating magnetic flux, the length of the longitudinal cross section of the secondary pickup winding 500 Primary track winding 300 and the same length as the longitudinal section of the; A primary air gap 400 formed in the center of the primary track 200 and performing a function of a passage through which the secondary pick-up core 600 moves; The electromotive force required for the moving load by moving the alternating magnetic flux generated from the primary track winding 300 while moving along the primary gap 400 with the moving vehicle while being wound and supported around the secondary pick-up core 600. A second pick-up winding 500 for inducing organic; The secondary pick-up winding 500 may continue to intersect the alternating magnetic flux while being attached to the moving vehicle while supporting the secondary pick-up winding 500 and moving along the primary gap 400 with the moving vehicle. On the other hand, the secondary pick-up core (600) to perform a function as a path to induce the flow of the alternating flux generated by the primary track winding (300); Secondary voids 700 formed on both sides of the center of the secondary pick-up core 600 to perform a function of a passage through which the primary track 200 moves; A converter 800 that converts the electromotive force induced in the secondary pickup winding 500 into power required for a mobile load and supplies the converted electromotive force; Contactless power transmission system of a multiple primary winding, characterized in that configured. The method according to claim 1, The resonance frequency tracking and monitoring unit 900, A zero crossing unit for monitoring the value of the resonant current supplied from the inverter 100 to the primary track winding 300 at all times to detect a time point at which the value of the current is zero, and then providing it to the phase comparator 920 ( 910 (zerocrossing section); Detects the changed resonant frequency and its phase based on the value of the zero current changed in real time provided from the zero crossing unit 910, and obtains the phase difference by comparing it with the phase of the oscillation signal provided from the voltage controlled oscillator 940, A phase comparison unit 920 for calculating a phase transfer function by calculating the changed phase and then providing the phase transfer function to the loop filter; A loop filter unit 930 for integrating the phase transfer function provided from the phase comparator 920 and providing the voltage transfer oscillator 940 to the voltage control oscillator 940; A voltage controlled oscillator 940 for oscillating a new frequency changed according to the resonant frequency changed according to the phase signal provided from the loop filter unit 930 and outputting the oscillated signal to the phase comparator 920 and the gate drive; A gate drive unit 950 for outputting a gate signal capable of zero current switching to the inverter 100 according to the signal provided from the voltage oscillation control unit; Contactless power transmission system of a multiple primary winding, characterized in that configured. The method according to claim 1 or 2, Non-contact power transmission system of the multiple primary winding, characterized in that the frequency of the high frequency output from the inverter is configured to be 25khz to 50khz. In operating a power supply system for supplying power in a non-contact manner using the principle of a linear induction transformer to a mobile load, The primary track 200 and the primary track winding 300 of the non-contact power supply system are configured in multiple, and the primary track 200 and the primary track winding 300 are multiplexed in the secondary pickup core 600 in a multiple manner. And configuring the secondary pick-up winding 500. The inverter 100 is installed at the front end of the primary track winding 300, and the resonance frequency tracking monitoring unit 900 is further disposed between the rear end and the front end of the inverter 100 to monitor the resonance frequency tracking. Allowing the unit 900 to track and monitor the resonance frequency output from the rear end of the inverter 100 in real time to readjust the phase difference, and then feed it back to the front end of the inverter 100 to provide it; A method of operating a contactless power transmission system of a multiple primary winding, characterized in that configured. The method according to claim 4, The resonant frequency tracking monitoring unit 900 to monitor and monitor the resonant frequency, The zero crossing unit 910 constantly monitors the value of the resonance current supplied from the inverter 100 to the primary track winding 300, detects a time point at which the value of the current is 0, and then transfers it to the phase comparator 920. Providing; The phase comparator 920 detects the changed resonant frequency and its phase based on the value of the zero current changed in real time provided from the zero crossing unit 910, and the phase of the oscillation signal provided from the voltage controlled oscillator 940. Calculating a phase transfer function by obtaining a phase difference, calculating a changed phase, and providing the same to a loop filter; Integrating a phase transfer function provided from the phase comparator 920 to the voltage controlled oscillator 940 by a loop filter unit 930; The voltage controlled oscillator 940 oscillates a new frequency changed according to the resonant frequency changed according to the phase signal provided from the loop filter unit 930, and outputs the oscillated signal to the phase comparator 920 and the gate drive. Wow; Outputting a gate signal capable of zero current switching to the inverter 100 according to a signal provided from the voltage oscillation controller; A method of operating a contactless power transmission system of a multiple primary winding, characterized in that configured. The method according to claim 4 or 5, The frequency of the high frequency output from the inverter is 25khz to 50khz characterized in that the operating method of the multiple primary winding contactless power transmission system.

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