KR20150039303A - Multi charging system for electric vehicle - Google Patents

Abstract

The present invention provides a multi-charging system for an electric vehicle which comprises: charging modules connected to an electric vehicle to charge the electric vehicle; a multi-charger connected to the charging modules to supply power to the charging modules; and a charging controller to control power supply from the multi-charger to the charging modules, wherein the multi-charger supplies R, S, and T phases of three-phase power connected through a distribution board to the charging modules, and the charging controller determines phase imbalance during the charging of the electric vehicle connected to the charging modules and controls the multi-charger to mitigate the phase imbalance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-

An embodiment of the present invention relates to a multi-charging system for electric moving means, and more particularly, to a multi-charging system for electric moving means capable of minimizing phase unbalance.

In order to prepare for the continuous rise of oil prices and depletion of fossil fuels, electric vehicles using electric energy instead of conventional fossil fuel-based automobiles and auto bikes, electric vehicles driven by electric motors, electric vehicles such as electric two- Research and commercialization are actively under way.

In the case of using the electric moving means, there are many advantages such as relatively low maintenance cost compared to the fossil fuel and improvement of the environmental problem due to the effect of reducing the carbon dioxide. As a result, the electric vehicle market is gradually being activated in each country, and this trend is expected to increase gradually.

In order to supply electric power to electric vehicles such as electric vehicles, a three-phase power source is used because the three-phase power source has less pulsation and more power than a single-phase power source.

The charger using three-phase power can charge the electric moving means by distributing the three-phase power to R, S, T single-phase power. In this case, the electromigration means may be connected only to a specific one of the R, S, and T phases so that a phase imbalance may occur. If a phase imbalance occurs, loss of the transformer and line may occur, which may cause malfunction of the protection relay.

It is a main object of one embodiment of the present invention to provide a multi-charging system for electric moving means capable of improving the phase imbalance that may occur in a multi-charging system for electric moving means using a three-phase power source.

A multi-charging system for an electrophoresis apparatus according to an embodiment of the present invention includes a charging module connected to an electrophoresis unit to charge the electrophoresis unit, and a controller connected to the plurality of charging modules, And a charging controller for controlling the supply of power from the multi-charger to the charging module, wherein the multi-charger supplies a three-phase power source connected through a distribution board to R, S, T And the charge controller may determine whether a phase imbalance is present during charging of the electromigration means connected to the charge module and control the multi-charger to improve the phase imbalance.

In the present invention, the three-phase power source supplied to the multi-charger through the distribution board may be a three-phase four-wire type or a three-phase three-wire type.

In the present invention, a plurality of the multi-chargers may be connected to one of the distribution boards.

In the present invention, the multi-charger can distribute the three-phase power supplied from the distribution panel so that the R, S, or T phases are supplied to each of the plurality of charging modules.

In the present invention, the multi-charger may transmit the same power to each of the plurality of charging modules, but may transmit power differentially to the plurality of charging modules so that a phase imbalance can be improved when a phase imbalance occurs.

In the present invention, each of the plurality of charging modules may supply power to any one of the R, S, and T phases to the electric moving means.

In the present invention, the charging module may measure a current supplied to the electromigration unit connected to the charging module, and may transmit the measured current value to the charging controller through the multi-charger.

In the present invention, the charge controller can determine whether the plurality of charge modules are being used for charging the electric moving means through the current value, and calculate the phase imbalance rate of the plurality of charge modules being charged .

In the present invention, the charge controller can control the multi-charger so that the phase unbalance rate is minimized by adjusting the amount of current supplied to the electro-moving unit in the charging module when phase imbalance occurs.

In the present invention, the charge controller may control the multi-charger to reduce the amount of current of the charging module that supplies power to the single-phase maximum usage capacity among the R, S, and T phases to minimize the phase imbalance .

In the present invention, the charge controller calculates the maximum facility capacity of the R, S, and T phases using the number m of the single phases in use and the minimum facility capacity of the R, S, ), And the phase unbalance can be minimized by controlling the multi-charger so that the maximum facility capacity has n + 1 single-phase facility capacity of the single-phase facility capacity in use.

In the present invention, the multi-charger may include a distributor connected to the distribution board and distributing the three-phase power supplied through the distribution board to each of the plurality of charging modules in a single phase, And a distribution control unit for controlling the distribution unit to control an amount of current supplied from the charging module to the electric moving unit.

In the present invention, the charging module may include a module controller to which the single-phase power source is connected from the distribution unit, a smart meter connected to the module controller and measuring a current value transmitted from the module controller to the electric moving unit, , A coupler which is connected to the electric moving means and supplies the single phase power to the electric moving means through the module controller and a controller which is disposed between the smart meter and the coupler, And an earth leakage breaker for blocking the generated line, and the smart meter can transmit the measured current value to the multi-charger.

In the present invention, the charge controller may include: a communication unit capable of receiving the current value data measured by the smart meter; and a determination unit that determines whether the plurality of charge modules are being used for charging the electric moving unit And an operation control unit for calculating the phase imbalance rate of the plurality of charging modules being charged.

In the present invention, when the phase imbalance occurs, the arithmetic and control unit may control the multi-charger so that the phase unbalance rate is minimized by adjusting the amount of current supplied from the charging module to the electric moving unit.

In the present invention, the charge controller may further include a panel unit capable of displaying information on charging of the electro-moving unit connected to the coupler, and capable of inputting an operation related to the charging operation.

In the present invention, the multi-charger may further include a communication unit capable of transmitting and receiving information on charging from the smart meter.

According to an embodiment of the present invention, it is possible to minimize the power loss by improving the phase imbalance that may occur in the multi-charging system for the electric moving means using the three-phase power source.

1 is a schematic diagram showing a multi-charging system for an electric moving means according to an embodiment of the present invention.
Fig. 2 is a configuration diagram specifically showing the components of the multi-charging system for electric moving means shown in Fig. 1. Fig.
3 is a block diagram schematically showing a multi-charging system for electric moving means according to another embodiment of the present invention.
FIGS. 4 to 7 are views illustrating a process of controlling the phase imbalance of the multi-charge system for the electric moving means according to the embodiment of the present invention.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not to be limited to the specific embodiments, but includes all changes, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily blurred. In addition, numbers (e.g., first, second, etc.) used in the description of the present specification may be identifier signals for distinguishing one element from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, As long as the opposite substrate does not exist, it may be connected or connected via another component in the middle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic diagram showing a multi-charging system for an electric mover according to an embodiment of the present invention. Fig. 2 is a configuration diagram specifically showing the components of the multi- to be.

1 and 2, a multi-charging system 100 for an electric vehicle according to an embodiment of the present invention may include a multi-charger 110, a charging module 120, and a charging controller 130 .

The multi-charger 110 is connected to the three-phase power source 101 through the distribution board 102, and can distribute the three-phase power source 101 to the single-phase power source and supply it to the charging module 120. That is, the multi-charger 110 can be connected to the distribution panel 102 to distribute the three-phase power supplied from the distribution panel 102 to the R, S, and T phases, and supply the three-phase power to each of the plurality of charging modules 120. Accordingly, each of the plurality of charging modules 120 can supply power to the electric moving means EV in any one of the R, S, and T phases.

The multi-charger 110 distributes the three-phase power supply equally so that each of the plurality of charging modules 120 can supply the same power to the electric moving means EV. However, when the phase unbalance occurs, the phase unbalance can be improved So that the plurality of charging modules 120 can be supplied with power differentially. This will be described later.

In one embodiment, the multi-charger 110 may include a distribution unit 111, a distribution control unit 112, and a communication unit 113.

The distribution unit 111 is connected to the distribution board 102 and can distribute the three-phase power supplied through the distribution board 102 in a single phase to supply the single-phase power to each of the plurality of charging modules 120. That is, the distributor 111 can transmit any one of R, S, and T phases of the three-phase power source to each of the plurality of charging modules 120. [

The distribution controller 112 may control the distribution unit 111 to adjust the output of the charging module 120 according to the control signal of the charging controller 130. [ That is, the charge controller 130 generates a control signal to adjust the output of the charge module 120 to improve the phase imbalance when a phase imbalance occurs in charging the electric vehicle EV through the charge module 120 And the distribution controller 112 may control the distribution unit 111 to adjust the current value transmitted from the distribution unit 111 to the charging module 120 according to the control signal. Accordingly, the distribution unit 111 can adjust the current value to be transmitted to the charging module 120 under the control of the distribution control unit 112. A method for improving the phase imbalance will be described later.

The communication unit 113 may receive the information on the charging transmitted from the charging module 120 and may transmit the charging information to the charging controller 130. [ The communication unit 113 may receive the measured current value from the smart meter 124 of the charging module 120 and may transmit it to the charging controller 130 again. The communication unit 113 can exchange information with the charging module 120 and the charging controller 130 by M2M (machine to machine) communication.

At least one charging module 120 may be connected to one multi-charger 110 and may receive R, S, or T phases of three-phase power from the multi-charger 110. That is, the three-phase power source 101 is divided into a single-phase power source of R, S, and T in the multi-charger 110, and each of the plurality of charging modules 120 supplies one of the R, S, And can be supplied to the moving means EV.

The charging module 120 can measure the amount of current supplied to the electric moving means EV connected to the charging module 120 and can transmit the measured amount of electric current to the charging controller 130. [ The charging module 120 may transmit the measured current values to the multi-charger 110. In the multi-charger 110, the current values transmitted from the charging modules 120 are supplied to the charging controller 130, Lt; / RTI >

The charging information including the measured current value and the like can be transmitted and received between the multi-charger 110 and the charging module 120 by the M2M communication and the Ethernet between the multi-charger 110 and the charging controller 130, The charging information can be transmitted / The multi-charger 110 and the charging controller 120 may be located at a relatively short distance so that the M2M communication may be used and the multi-charger 110 and the charging controller 130 may be located at relatively long distances so that the Ethernet communication may be used.

In one embodiment, the charging module 120 may include a body portion 121 and a coupler 122.

The coupler 122 is directly connected to the electric moving means EV and can be directly connected to the inlet of the electric moving means. The single-phase power source, which is transmitted to the charging module 120 through the coupler 122, can be directly applied to the electric moving means EV.

The main body 121 may include a module controller 123, a smart meter 124, and an earth leakage breaker 125.

The module controller 123 is connected to the distributing unit 111 of the multi-charger 110 and the single-phase power transmitted from the distributing unit 111 can be transmitted to the coupler 122 through the module controller 123.

A smart meter 124 may be disposed between the coupler 122 and the module controller 123. The smart meter 124 may measure the amount of current flowing from the module controller 123 to the coupler 122. [

The smart meter 124 may also send the measured current value to the charge controller 130 via the multi-charger 110. [ As described above, the communication between the smart meter 124 and the communication unit 113 of the multi-charger 110 can be performed by the M2M communication method.

A ground fault interrupter 125 may be disposed between the smart meter 124 and the coupler 122. The earth leakage breaker 125 may block the line when an abnormality occurs in the line between the smart meter 124 and the coupler 122, thereby preventing a fire or the like due to a short circuit. In addition, the smart meter 124 can block a line where an abnormality occurs when a short circuit occurs in other lines in the charging module as well as a line abnormality between the smart meter 124 and the coupler 122.

The charging controller 130 receives the measured current value from the smart meter 124 in real time to identify the charging module 120 being used to charge the electric vehicle EV, ) Can be calculated.

The phase unbalance ratio can be obtained by the following equation (1).

[Equation 1]

Phase unbalance ratio = ((Difference between maximum and minimum of single phase load capacity applied to each phase) / (1/3 of total load facility capacity)) * 100

For example, referring to FIG. 4, there are six charging modules 120R1, ..., 120R6 supplying power to the R phase, and charging modules 120S1, ..., ..., 120T4, 120T1, ..., 120T4, ..., and 120T4 that supply power to the T phase are three, and the charging modules 120R1, ..., 120R6 120T3 are 7KW, the single-phase power source corresponding to the maximum equipment capacity is a charging module 120R1, ..., 120R6 that supplies power to the R-phase charging unit connected to six electric moving units, The single-phase power supply corresponding to the minimum facility capacity corresponds to the charging modules 120T1, ..., 120T3 that supply power to the T-phase being charged by the three electric moving means connected thereto, and the phase unbalance rate corresponds to Equation 1 due to,

((7KW * 6-7KW * 3) / ((7KW * 13) / 3)) * 100 = 69.23 (%)

Lt; / RTI >

The charging controller 130 calculates the phase imbalance rate as described above and calculates the amount of current supplied to the electric moving means EV from the charging module 120 so that the phase imbalance rate is minimized when it is determined that phase imbalance has occurred Can be adjusted. More specifically, the charge controller 130 may transmit a control signal to the multi-charger 110 so that the amount of current supplied to the electric vehicle EV from the charge module 120 is regulated. According to the control signal, the distribution unit 111 of the multi-charger 110 can adjust the output of the charging module 120 by adjusting the amount of current supplied to the charging module 120, As the amount of power supplied is controlled, the capacity of the charging module 120 can be controlled.

As an example, in order to minimize the phase imbalance rate, the charge controller 130 may control the multi-charger 110 to reduce the amount of current of the charge module 120, which is the maximum facility capacity of the R, S, and T phases . That is, the charge controller 130 sets the maximum facility capacity among the R, S, and T phases to the number (m) of the single phase (R phase in FIG. 4) The number n of the single phase (T phase in Fig. 4) is discriminated, and the multi-charger 110 is set so that the facility capacity of the single phase (R phase in Fig. 4) So that the phase imbalance can be minimized. Referring to FIG. 4, there are six charging modules 120R1, ..., 120R6 for supplying power to the R phase, four charging modules 120S1, ..., 120S4 for supplying power to the S phase, Phase power source corresponding to the maximum equipment capacity is connected to six charging means 120R1 (120R1, 120R2, 120R1, ..., 120R1) for supplying power to the R- , ..., 120R6), and the single-phase power source corresponding to the minimum facility capacity corresponds to charging modules 120T1, ..., and 120T4 that supply power to the T- The charging controller 130 controls the number of the charging modules 120T1, ..., and 120T3 on the T supplying the minimum facility capacity of the charging modules 120R1, ..., The amount of current of the charging modules 120R1, ..., and 120R6 can be adjusted so that the capacity of one of the charging modules 120R1, ..., and 120R6 is four more.

That is, the charge controller 130 controls the charging modules 120R1, ..., 120R6 so that the total installation capacity of the six charging modules 120R1, ..., 120R6 supplying the R phase power is 4 * 7KW = It is possible to adjust the amount of the current supplied to the transistor.

5, among the six charging modules 120R1, ..., 120R6 that supply power to the R phase, the amount of current supplied to some of the charging modules 120R4, ..., 120R6 Can be adjusted. In detail, three charging modules 120R1, ..., 120R6 connected to the electric moving means EV are connected to the electric moving means EV among the charging modules 120R1, ..., 120R6 for supplying power to the R- 120R2 and 120R3 each maintains an output of 7 KW and thereafter the three charging modules 120R4, 120R5 and 120R6 connected to the electric moving means EV are connected in such a manner that their outputs correspond to the output of one charging module 7KW, that is, the charge controller 130 can control the amount of electric current so that the output of each of the three charge modules 120R4, 120R5, 120R6 is 2.33KW.

In this case, the phase unbalance ratio of the load is calculated by the above-mentioned equation (1)

((7KW * 4-7KW * 3) / ((7KW * 11) / 3))) 100 = 27.3 (%)

So that the phase unbalance ratio of the multi-charging system can be improved.

In one embodiment, the charge controller 130 may include a panel unit 131, an operation control unit 133, and a communication unit 134.

The panel unit 131 includes a display unit (not shown) capable of displaying information about charging, such as a current amount measured by the smart meter 124, and an input unit (not shown) capable of inputting charging operations such as start, (Not shown). The display unit may display contents such as the amount of electric current measured by the smart meter 124 connected to the coupler 122, the connection order of the electric moving means, the charging sequence, the charging start / end time, the charging charge, The input unit may include at least one button or a touch screen, and may start / stop or stop charging by pressing a button or touching the touch screen.

The arithmetic and control unit 133 can determine whether a plurality of charging modules 120 are being used for charging the electric moving means through the current value transmitted from the smart meter 124. Also, The charging module 120 can control the amount of electric current supplied to the electric moving means EV to minimize the phase imbalance rate when the phase imbalance occurs, Can be controlled.

The charging controller 130 may further include a communication unit 134 capable of receiving information on charging such as a current value measured by the smart meter 124. [ The communication unit 134 can exchange data with the multi-charger 110 through Ethernet communication.

3 is a block diagram schematically showing a multi-charging system for electric moving means according to another embodiment of the present invention.

Referring to FIG. 3, the multi-charging system 200 for an electric mover according to another embodiment of the present invention may include a plurality of multi-chargers 110a, 110b, 110c, and 110d. That is, in the multi-charging system 100 for electric moving means shown in FIG. 1, one multi-charger 110 is connected to one distribution panel 102, but the multi-charging system for electric moving means The four charging modules 110a, 110b, 110c and 110d can be connected to one distribution panel 202 and eight charging modules 120 are connected to the multi-charging devices 110a, 110b, 110c and 110d, respectively. So that the charging of a total of 32 electric vehicles (EV) can be controlled. However, the present invention is not limited to this, and a plurality of multi-chargers may be provided in one distribution panel, and a plurality of charging modules may be connected to one multi-charger.

FIGS. 4 to 7 are views illustrating a process of controlling the phase imbalance of the multi-charge system for the electric moving means according to the embodiment of the present invention.

4 is a view schematically showing a state in which thirteen electric vehicles EV are connected to the charging module 120 to be charged, and FIG. 5 is a schematic diagram showing a state in which the phase unbalance ratio of FIG. 4 is minimized Fig.

Referring to FIG. 4, there are six charging modules 120R1, ..., 120R6 for supplying power to the R phase, four charging modules 120S1, ..., 120S4 for supplying power to the S phase, There are three charging modules 120T1, ..., and 120T4 for supplying power on the battery pack.

When the maximum capacity of each of the charging modules 120R1, ..., 120R6, 120S1, ..., 120S4, 120T1, ..., 120T3 is 7 KW, And a charging module (120R1, ..., 120R6) for supplying power of the R-phase being connected and being charged, and the single-phase power source corresponding to the minimum equipment capacity is connected to three charging means (120T1, ..., 120T3), the charge controller 130 can calculate the phase unbalance rate according to Equation (1). As described above, the phase unbalance rate is ((7KW * 6-7KW * 3) / ((7KW * 13) / 3)) * 100 = 69.23 (%).

The charge controller 130 may calculate the phase imbalance rate as described above and adjust the facility capacity of the charging module 120 to minimize the phase imbalance rate when it is determined that phase imbalance has occurred, The adjustment can be made by adjusting the amount of electric current supplied to the electric vehicle (EV).

More specifically, the charge controller 130 calculates the maximum facility capacity of the R, S, and T phases based on the number (m) of the single phase (R phase in FIG. 4) (N) of the single phase (T phase in use) in use is discriminated and the multi-charger (n-1) having the facility capacity of the single phase (R phase in Fig. 4) 110 can be controlled to minimize phase imbalance. Referring to FIG. 4, there are six charging modules 120R1, ..., 120R6 for supplying power to the R phase, four charging modules 120S1, ..., 120S4 for supplying power to the S phase, Phase power source corresponding to the maximum equipment capacity is connected to six charging means 120R1 (120R1, 120R2, 120R1, ..., 120R1) for supplying power to the R- , ..., 120R6), and the single-phase power source corresponding to the minimum facility capacity corresponds to charging modules 120T1, ..., and 120T4 that supply power to the T- The charging controller 130 controls the number of the charging modules 120T1, ..., and 120T3 on the T supplying the minimum facility capacity of the charging modules 120R1, ..., The amount of current of the charging modules 120R1, ..., and 120R6 can be adjusted so that the capacity of one of the charging modules 120R1, ..., and 120R6 is four more.

5, the charge controller 130 controls the amount of current supplied to some of the six charge modules 120R1, ..., 120R6 that supply power to the R phase, Can be adjusted. In detail, three charging modules 120R1, ..., 120R6 connected to the electric moving means EV are connected to the electric moving means EV among the charging modules 120R1, ..., 120R6 for supplying power to the R- 120R2 and 120R3 each maintains an output of 7 KW and thereafter the three charging modules 120R4, 120R5 and 120R6 connected to the electric moving means EV are connected in such a manner that their outputs correspond to the output of one charging module 7KW, that is, the charge controller 130 can control the amount of electric current so that the output of each of the three charge modules 120R4, 120R5, 120R6 is 2.33KW.

In this case, the phase unbalance ratio of the load is calculated by the above-mentioned equation (1)

((7KW * 4-7KW * 3) / ((7KW * 11) / 3))) 100 = 27.3 (%)

So that the phase unbalance ratio of the multi-charging system can be improved.

In another embodiment, the charge controller 130 may control the multi-charger 110 to reduce the amount of charge in the charge module 120, which is the maximum capacity of the R, S, and T phases, to minimize the phase imbalance rate. have. That is, the charge controller 130 controls the charging modules 120R1, ..., 120R6 so that the total installation capacity of the six charging modules 120R1, ..., 120R6 supplying the R phase power is 4 * 7KW = It is possible to adjust the amount of the current supplied to the transistor. That is, the charge controller 130 can control the amount of current of each of the six charging modules 120R1, ..., 120R6 to be 4.66 KW.

In this case, the phase unbalance ratio of the load is calculated by the above-mentioned equation (1)

((4.66KW * 6-7KW * 3) / ((7KW * 11) / 3))) * 100 = 27.3 (%)

So that the phase unbalance ratio of the multi-charging system can be improved.

FIG. 6 is a view schematically showing a state in which a total of 10 electric vehicles EV are connected to the charging module 120 to be charged, and FIG. 7 is a view schematically showing a state in which the phase unbalance rate of FIG. 6 is minimized .

6, there are six charging modules 120R1, ..., 120R6 for supplying power to the R phase, three charging modules 120S1, ..., 120S3 for supplying power to the S phase, and T One charging module 120T1 for supplying power on the power supply unit 120T1.

When the maximum capacity of each of the charging modules 120R1, ..., 120S3, 120R1, 120S1, ..., 120S3, 120T1 is 7 KW, the single phase power source corresponding to the maximum equipment capacity is connected to six electric moving means, The single-phase power source corresponding to the minimum facility capacity is connected to one electric moving means, and the charging module 120T1 for supplying the power of the T-phase being charged is connected to the corresponding one of the charging modules 120T1, 120R2, The charging controller 130 can calculate the phase unbalance rate according to Equation (1). As described above, the phase unbalance rate is ((7KW * 6-7KW * 1) / (7KW * 10) / 3)) 100 = 150 (%).

The charge controller 130 may calculate the phase imbalance rate as described above and adjust the facility capacity of the charging module 120 to minimize the phase imbalance rate when it is determined that phase imbalance has occurred, The adjustment can be made by adjusting the amount of electric current supplied to the electric vehicle (EV).

More specifically, the charge controller 130 calculates the maximum facility capacity among the R, S, and T phases based on the number (m) of the single phase (R phase in FIG. 6) (N) of the single phase (T phase in Fig. 6) in use is discriminated and the multi-charger (n-1) is set to have the facility capacity of the single phase (R phase in Fig. 4) 110 can be controlled to minimize phase imbalance. 6, there are six charging modules 120R1, ..., 120R6 for supplying power to the R phase, three charging modules 120S1, ..., 120S3 for supplying power to the S phase, and T The single-phase power source corresponding to the maximum facility capacity is connected to six charging means 120R1, ..., 120R6 The single-phase power supply corresponding to the minimum facility capacity corresponds to a charging module 120T1 that supplies power to the T-phase being charged by one electric moving means connected thereto, and the charging controller 130 supplies power to the R phase The maximum facility capacity of the charge modules 120R1, ..., 120R6 is set to be two facility capacity that is one more than the number (one) of the T-based charge modules 120T1 supplying the minimum facility capacity. , ..., 120R6 can be controlled.

6, the charge controller 130 calculates the amount of current supplied to some of the six charge modules 120R2, ..., and 120R6 among the six charge modules 120R1, ..., Can be adjusted. In detail, one charging module 120R1 connected to the electric moving means EV is connected to the electric moving means EV among the charging modules 120R1, ..., 120R6 for supplying power to the R phase, Each of the five charging modules 120R2, 120R3, 120R4, 120R5 and 120R6 connected to the electric moving means EV keeps the output of 7KW each, while the sum of these outputs corresponds to the output of one charging module The charge controller 130 can control the amount of current to be 7 KW, that is, the output of each of the five charge modules 120R2, 120R3, 120R4, 120R5, and 120R6 is 1.4 KW.

In this case, three charging modules 120S1, 120S2 and 120S3 for supplying power to the S phase are provided to provide the maximum facility capacity, and the maximum facility capacity of the charging modules 120S1, 120S2 and 120S3 for supplying power to the S phase is The amounts of currents of the charging modules 120S1, 120S2, and 120S3 can be adjusted so that the number of the charging modules 120S1, 120S2, and 120S3 becomes one more than the number of the charging modules 120T1 on the T supplying the minimum facility capacity. Specifically, one of the charging modules 120S1, 120S2 and 120S3 for supplying power to the S phase is connected to the electric moving means EV, and one charging module 120S1, which is connected to the electric moving means EV, But the two charging modules 120S2 and 120S3 connected to the electric moving means EV are then switched so that the sum of these outputs is 7KW corresponding to the output of one charging module, The charge controller 130 can control the amount of these currents so that the output of each of the transistors 120S2 and 120S3 is 3.5 KW.

In this case, the phase unbalance ratio of the load is calculated by the above-mentioned equation (1)

((7KW * 2-7KW * 1) / ((7KW * 5) / 3))) 100 = 60 (%)

So that the phase unbalance ratio of the multi-charging system can be improved.

In another embodiment, the charge controller 130 may control the multi-charger 110 to reduce the amount of charge in the charge module 120, which is the maximum capacity of the R, S, and T phases, to minimize the phase imbalance rate. have. That is, the charge controller 130 controls the charging modules 120R1, ..., 120R6 so that the total equipment capacity of the six charging modules 120R1, ..., 120R6 supplying the power of the R phase is 2 * 7KW = It is possible to adjust the amount of the current supplied to the transistor. That is, the charge controller 130 can control the amount of current of each of the six charging modules 120R1, ..., 120R6 to be 2.33KW.

The charging controller 130 also controls the amount of current supplied to the charging modules 120S1, 120S2, and 120S3 so that the total equipment capacity of the three charging modules 120S1, 120S2, and 120S3 that supply the S phase power is 2 * 7KW = 14KW Can be adjusted. That is, the charge controller 130 can control the amount of current of each of the three charging modules 120S1, 120S2, 120S3 so that the output of each of the three charging modules 120S1, 120S2, 120S3 is 4.66KW.

In this case, the phase unbalance ratio of the load is calculated by the above-mentioned equation (1)

((2.33KW * 6-7KW * 1) / ((7KW * 5) / 3))) 100 = 60 (%)

So that the phase unbalance ratio of the multi-charging system can be improved.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100, 200: Multi-charging system for electric moving means
101: Three phase power supply 102: Distribution board
110a, 110b, 110c, 110d:
111: distribution unit 112: distribution control unit
113: communication unit 120: charging module
121: charging module main body 122: coupler
123: Module controller 124: Smart meter
125: earth leakage breaker 130: charge controller
131: Display section 133: Operation control section
134:

Claims (17)

A charging module connected to the electric moving means to charge the electric moving means;
A multi-charger connected to the plurality of charging modules and supplying power to the charging modules;
A charging controller for controlling the power supply from the multi-charger to the charging module; And,
The multi-charger supplies each of the R, S, and T phases of the three-phase power source connected through the distribution board to the charging module,
Wherein the charge controller controls the multi-charger so as to determine whether a phase unbalance occurs during charging of the electric moving means connected to the charging module, and to improve the phase unbalance. The method according to claim 1,
Wherein the three-phase power source supplied to the multi-charger through the distribution board is a three-phase four-wire type or a three-phase three-wire type. The method according to claim 1,
And a plurality of the multi-chargers are connected to one of the distribution boards. The method according to claim 1,
Wherein the multi-charger distributes the three-phase power supplied from the distribution panel so that the R, S, or T phase is supplied to each of the plurality of charging modules. The method according to claim 1,
Wherein the multi-charger transmits power to each of the plurality of charging modules in a differential manner so as to improve phase unbalance when phase unbalance occurs, Multi-charging system. The method according to claim 1,
Wherein each of the plurality of charging modules supplies power to any one of the R, S, and T phases to the electric moving means. The method according to claim 1,
Wherein the charging module measures a current supplied to the electric moving means connected to the charging module and transmits the measured current value to the charging controller through the multicharger, . 8. The method of claim 7,
Wherein the charge controller is operable to determine whether the plurality of charge modules is being used for charging the electrophoresis means through the current value and to calculate a phase imbalance rate of the plurality of charge modules being charged Multi-charging system for moving vehicles. The method according to claim 1,
Wherein the charge controller controls the multicharger so that the phase imbalance rate is minimized by regulating an amount of current supplied to the electromigration unit in the charging module when phase imbalance occurs, . The method according to claim 1,
Wherein the charge controller controls the multi-charger to reduce the phase imbalance by reducing the amount of current in the charging module that supplies power to the single phase in use of the maximum capacity of the R, S, T phases. Multi-charging system for moving vehicles. 11. The method of claim 10,
The charging controller determines the maximum number of the single-phase (m) used in the maximum capacity of the R, S, and T phases and the number (n) of the single- And the multi-charger is controlled to minimize the phase imbalance so that the maximum facility capacity has n + 1 single-phase facility capacity of the single-phase facility capacity in use. The method according to claim 1,
The multi-
A distribution unit connected to the distribution board and distributing the three-phase power supplied through the distribution board to each of the plurality of charging modules in a single phase; And
A dispensing control unit for controlling the dispensing unit to adjust an amount of electric current supplied from the charging module to the electric moving unit according to a control signal of the charging controller; And a charging device for charging the electrophoresis medium. 13. The method of claim 12,
The charging module includes:
A module controller to which the single-phase power source from the distribution unit is connected;
A smart meter connected to the module controller for measuring a current value transmitted from the module controller to the electric moving unit;
A coupler connected to the electric moving means and supplying the single phase power to the electric moving means through the module controller; And
An earth leakage breaker disposed between the smart meter and the coupler to shut off the line where an abnormality occurs when an abnormality occurs in the line of the charging module; And,
And the smart meter transmits the measured current value to the multi-charger. 13. The method of claim 12,
Wherein the charge controller comprises:
A communication unit capable of receiving the current value data measured by the smart meter; And
An arithmetic and control unit operable to determine whether the plurality of charging modules are being used for charging the electrophoresis unit through the current value and to calculate a phase imbalance rate of the plurality of charging modules being charged; And a charging device for charging the electrophoresis medium. 14. The method of claim 13,
Wherein the operation control unit controls the multi-charger for electric moving means so that the phase unbalance rate is minimized by adjusting an amount of electric current supplied to the electric moving means from the charging module when phase imbalance occurs, . 14. The method of claim 13,
Wherein the charge controller comprises:
A panel unit capable of displaying information on charging of the electrophoresis means connected to the coupler and capable of inputting an operation relating to the charging operation; Further comprising: a charging device for charging the electrophoresis medium. 14. The method of claim 13,
The multi-
Further comprising a communication unit capable of transmitting and receiving information on charging from the smart meter.

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