WO2011099193A1 - Vehicle system, method of controlling vehicle system, and transportation system - Google Patents

Abstract

Disclosed is a vehicle system that is mounted on a vehicle, that can have power supplied thereto from an overhead-line power supply, and that is provided with the following. A parallel circuit comprising a load circuit (3) and a storage battery (21) connected in parallel. A current collector (11) that is connected in series with the parallel circuit, and that is installed so as to be electrically connectable to an overhead-line power supply. A first switch (12) installed between the current collector (11) and the parallel circuit. A second switch (22) installed between the storage battery (21) and a motor (31), and also between the current collector (11) and the storage battery (21). A rectifier (23) that is connected in parallel with the second switch (22), installed between the storage battery (21) and the load circuit (3), and that allows currents flowing from the current collector (11) and the load circuit (3) towards the storage battery (21), and restricts currents flowing from the storage battery (21) towards the current collector (11) and the load circuit (3).

Description

Vehicle system, vehicle system control method, and traffic system

The present invention relates to a vehicle system that is mounted on a vehicle that has a current collector for obtaining electric power from an overhead line power source and a storage battery, and travels on a route including an overhead line section and an overhead line-less section. The present invention also relates to a vehicle system control method. The present invention also relates to a traffic system having a vehicle equipped with a vehicle system and an overhead power source.
This application claims priority on February 10, 2010 based on Japanese Patent Application No. 2010-027821 filed in Japan, the contents of which are incorporated herein by reference.

Conventionally, it has current collectors and storage batteries that obtain power from overhead power sources, and runs on routes that include overhead wire sections (sections where power can be obtained from overhead power sources) and overhead line-less sections (sections where power cannot be obtained from overhead power sources) A vehicle system mounted on a vehicle that has been developed has been developed (see, for example, Patent Document 1).
The vehicle system described in Patent Document 1 includes a DC / DC converter (Direct Current to Direct Current Converter) and a regenerative power recovery circuit. Here, the regenerative power refers to power generated by regenerative braking. Regenerative braking refers to braking the vehicle by rotating the motor with the kinetic energy of the vehicle and converting the kinetic energy of the vehicle into electrical energy. In the above vehicle system, the DC / DC converter supplies electric power obtained by adding electric power supplied from the storage battery to electric power supplied from the overhead power supply via the current collector to the motor via the inverter. The regenerative power recovery circuit supplies regenerative power generated in the motor by regenerative braking only to the storage battery without supplying it to the current collector.

However, the DC / DC converter corresponding to a large current is large. For this reason, when a vehicle system using a DC / DC converter is employed, there may be a case where sufficient vehicle space cannot be secured. Therefore, a vehicle system that does not use a DC / DC converter is desired.
As a vehicle system that does not use a DC / DC converter, the following vehicle system can be considered.

FIG. 8 is a schematic block diagram showing a configuration of a conventional vehicle system.
The conventional vehicle system shown in FIG. 8 closes the switch 906 and opens the switch 907 when the vehicle is traveling in the overhead line section. As a result, the vehicle system supplies the electric power obtained by the current collector 901 when the vehicle is traveling in the overhead line section to the motor 903 via the VVVF (Variable Voltage Variable Frequency) inverter 904, and at the same time, the SIV (Static Inverter) ) Via 905 and supplied to auxiliary equipment such as room lighting.
Further, the vehicle system opens the switch 906 and closes the switch 907 when the vehicle is traveling in an overhead line-less section. Thus, the vehicle system supplies power from the storage battery 902 to the motor 903 and the auxiliary machine when the vehicle is traveling in the overhead line-less section.
In other words, the conventional vehicle system shown in FIG. 8 connects the current collector 901 to another circuit constituting the vehicle system and disconnects the storage battery 902 from the circuit when the vehicle is traveling in the overhead line section. In addition, the vehicle system connects the storage battery 902 to the above circuit and disconnects the current collector 901 from the above circuit when the vehicle is traveling in an overhead line-less section.

JP 2009-171772 A

Thus, the vehicle system shown in FIG. 8 disconnects the storage battery 902 from the circuit when the vehicle is traveling in the overhead line section. Therefore, there is a problem that when the vehicle is traveling in the overhead line section, the regenerative power generated in the load circuit having the motor 903 cannot be supplied to the storage battery and reused.
Therefore, the present invention provides a vehicle system that supplies power from a load circuit to a storage battery when the vehicle is traveling in an overhead line section without using a DC / DC converter.

The present invention is a vehicle system mounted on a vehicle and capable of supplying power from an overhead power supply, and includes the following. A parallel circuit including a load circuit and a storage battery connected in parallel. A current collector connected in series to the parallel circuit, provided so as to be electrically connectable to the overhead line power supply, and taking in power from the overhead line power supply. A first switch provided between the current collector and the parallel circuit; A second switch provided between the storage battery and the load circuit and between the current collector and the storage battery. A rectifier connected in parallel with the second switch. Here, the rectifier is provided in parallel with the second switch between the storage battery and the load circuit, allows current to flow from the current collector and the load circuit to the storage battery, and the current collector and the storage battery. The current flowing from the current to the load circuit is regulated.

Further, the vehicle system of the present invention may include a control unit that controls opening and closing of the switch. The controller closes the first switch and opens the second switch when the current collector is in contact with the overhead power supply (when electrically connected). In addition, the control unit opens the first switch and closes the second switch when the current collector and the overhead line power supply are not in contact (when not electrically connected).

Further, the vehicle system of the present invention may include a third switch provided in series with the rectifier. The controller may open the third switch when the charge rate of the storage battery exceeds a predetermined charge rate.

Moreover, the vehicle system of the present invention may include a current position acquisition unit and a route information database. The current position acquisition unit acquires current position information of the vehicle. In the route information database, a section included in a route on which the vehicle travels is an overhead section in which the current collector is electrically connected to the overhead power supply (which can take in power from the overhead power supply), Alternatively, it indicates whether the current collector is in an overhead line-less section in which the current collector is not electrically connected to the overhead power source (power cannot be taken from the overhead power source). In this case, the control unit refers to the current position information acquired by the current position acquisition unit and the route information database. And the said control part is based on the said current position information and the reference result of the said route information database, the said vehicle is located in the said overhead line area (the said current position information is in an overhead line area), and the said overhead line area and the said The second switch is closed when it is determined that the vehicle is located in the rearward direction of the vehicle by a predetermined distance from the boundary position with the overhead line-less section. The control unit opens the first switch when it is determined from the reference result that the vehicle is located in the overhead line section and located in front of the traveling direction by a predetermined distance from the boundary position. . Further, based on the reference result, the control unit determines that the vehicle is located in the overhead line-less section (the current position information is in the overhead line-less section) and is in the traveling direction by a predetermined distance from the boundary position. When it is determined that it is located rearward, the first switch is closed. The control unit opens the second switch when it is determined from the reference result that the vehicle is located in the overhead line-less section and is located in front of the traveling direction by a predetermined distance from the boundary position. .

Further, when the vehicle system of the present invention includes the current position acquisition unit and the route information database, the control unit may refer to the voltage and capacity of the storage battery and the voltage of the overhead power supply. In this case, when the voltage of the storage battery is greater than a predetermined threshold value or higher than the voltage of the overhead line power supply, or when the capacity of the storage battery is smaller than a predetermined threshold value, the control unit, the current position information and the route information database Refer to The vehicle is positioned in the overhead line section (the current position information is in the overhead line section), and the vehicle travels in a traveling direction by a predetermined distance from a boundary position between the overhead line section and the overhead line-less section. When it is determined that the second switch is located rearward, the first switch is opened without closing the second switch (in an open state). The controller closes the second switch when it is determined that the vehicle is located in the overhead line section and located in front of the traveling direction by a predetermined distance from the boundary position. Further, the control unit determines that the vehicle is positioned in the overhead line-less section (the current position information is in the overhead line-less section) and is positioned behind the boundary position by a predetermined distance from the boundary position. Then, the second switch is opened without closing the first switch (in an open state). The controller closes the first switch when it is determined that the vehicle is positioned in the overhead line-less section and is positioned in front of the traveling direction by a predetermined distance from the boundary position.

In the present invention, the load circuit may include a motor that drives the vehicle when power is supplied, and regenerative power may be generated by the motor when the vehicle performs regenerative braking. In this case, the allowable charging voltage value of the storage battery is equal to or higher than the voltage of the overhead power supply when the vehicle performs regenerative braking and the load circuit generates regenerative power. In addition, the allowable discharge voltage value of the storage battery is equal to or less than the voltage of the overhead power supply when the load circuit does not generate regenerative power.

In the vehicle system control method according to the present invention, when the current collector and the overhead power supply are electrically connected, the first switch is closed and the second switch is opened, thereby The detour bypasses the detour that electrically connects the current collector and the load circuit and the storage battery, and the current collector, the load circuit, and the storage battery are electrically connected via the rectifier State. Further, when the current collector and the overhead line power supply are not electrically connected, the first switch is opened and the second switch is closed, whereby the current collector and the storage battery are electrically connected. The connection is released, and the bypass circuit is opened to electrically connect the storage battery and the load circuit via the second switch.

A traffic system according to the present invention includes a vehicle equipped with the vehicle system described above, and an overhead power supply that supplies electric power to the vehicle.

According to the vehicle system, the vehicle system control method, and the traffic system of the present invention, current flows from the load circuit to the storage battery even when the vehicle is traveling in the overhead line section. Therefore, even when the vehicle is located in the overhead line section, it is possible to charge the storage battery by supplying power from the load circuit.

1 is a schematic block diagram showing a configuration of a vehicle system according to a first embodiment of the present invention. It is a graph which shows the relationship between the SOC operation width of a storage battery, and a voltage. It is a schematic block diagram which shows a vehicle system when the vehicle is drive | working the section without an overhead wire. It is a schematic block diagram which shows the structure of the vehicle system by 2nd Embodiment. It is a schematic block diagram which shows the structure of the vehicle system by 3rd Embodiment. It is a 1st timing chart which shows the control timing of the switch by the vehicle system by 3rd Embodiment. It is a 2nd timing chart which shows the control timing of the switch by the vehicle system by 3rd Embodiment. It is a schematic block diagram which shows the structure of the conventional vehicle system.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic block diagram showing the configuration of the vehicle system according to the first embodiment of the present invention.
The vehicle system includes a current collecting circuit 1, a power storage circuit 2, a load circuit 3, and a control circuit (control unit) 4. The current collecting circuit 1 is connected in series to a power storage circuit 2 and a load circuit 3 connected in parallel.

The current collector circuit 1 includes a current collector 11 and a switch 12.
The current collector 11 of the current collector circuit 1 is connected in series to the switch 12 and is provided so as to be electrically connectable to the overhead wire power source by contacting the overhead wire power source in the overhead wire section. The current collector 11 is supplied with electric power from the overhead power supply by being electrically connected to the overhead power supply.
The switch 12 of the current collector circuit 1 is connected in series with the current collector 11. The switch 12 is connected in series to the storage circuit 2 and the load circuit 3 connected in parallel. When the switch 12 is closed, the power supplied from the overhead power supply to the current collector 11 is supplied to the power storage circuit 2 and the load circuit 3.

The storage circuit 2 includes a storage battery 21, a switch 22, and a rectifier 23.
The storage battery 21 of the storage circuit 2 is connected in series to a parallel circuit composed of a switch 22 and a rectifier 23 connected in parallel. The storage battery 21 supplies power to the load circuit 3 via the switch 22. Further, the storage battery 21 is charged with electric power supplied from the current collector circuit 1 and the load circuit 3 via the rectifier 23.
The switch 22 of the storage circuit 2 is connected in parallel with the rectifier 23. A parallel circuit composed of the switch 22 and the rectifier 23 is connected in series to the storage battery 21, and is connected in series to the current collector circuit 1 and the load circuit 3. When the switch 22 is closed, the storage battery 21 supplies power to the load circuit 3.
The rectifier 23 of the power storage circuit 2 allows (allows) the current flowing from the current collecting circuit 1 and the load circuit 3 to the storage battery 21 and blocks (regulates) the current flowing from the storage battery 21 to the current collecting circuit 1 and the load circuit 3. .

The load circuit 3 includes a motor 31, a VVVF inverter 32, and a SIV 33.
The motor 31 of the load circuit 3 is connected to the VVVF inverter 32. In addition, the motor 31 is driven by the electric power supplied from the VVVF inverter 32 to drive the vehicle. Further, the motor 31 supplies the electric power generated by the regenerative braking of the vehicle to the power storage circuit 2 via the VVVF inverter 32.
The VVVF inverter 32 of the load circuit 3 is connected in parallel with the SIV 33. The VVVF inverter 32 is connected in series with the current collector circuit 1 and the power storage circuit 2. The VVVF inverter 32 converts electric power supplied from the current collecting circuit 1 or the power storage circuit 2 into an alternating current, and drives the motor 31 to change speed.
The SIV 33 of the load circuit 3 converts the power supplied from the current collecting circuit 1 or the power storage circuit 2 into an alternating current and supplies the power to auxiliary equipment such as room lighting.

The control circuit 4 controls the opening and closing of switches such as the switch 12 and the switch 22. Specifically, the control circuit 4 determines whether or not the current collector 11 of the current collector circuit 1 is in contact (electrically connected) with the overhead wire power source. When the control circuit 4 determines that the current collector 11 is in contact with the overhead power supply, the control circuit 4 closes the switch 12 of the current collector circuit 1 and opens the switch 22 of the power storage circuit 2. On the other hand, when the control circuit 4 determines that the current collector 11 is not in contact with the overhead power supply, the control circuit 4 opens the switch 12 of the current collector circuit 1 and closes the switch 22 of the power storage circuit 2.

That is, the vehicle system according to the present embodiment has the following configuration. A parallel circuit including a storage circuit 2 and a load circuit 3 connected in parallel. A switch 12 provided between the parallel circuit and the current collector 11. A switch 22 provided at a position between the storage battery 21 and the motor 31 and between the current collector 11 and the storage battery 21. A rectifier 23 is provided between the storage battery 21 and the motor 31 in parallel with the switch 22 and allows current to flow from the current collector 11 and the motor 31 to the storage battery 21 and regulates current flowing from the storage battery 21 to the current collector 11 and the motor 31. .
Thereby, the vehicle system can supply regenerative electric power generated in the motor of the load circuit by regenerative braking when the vehicle is traveling in the overhead line section without using a DC / DC converter to the storage battery.

FIG. 2 is a graph showing the relationship between the operating width of SOC (State of Charge) of the storage battery and the voltage. Here, the SOC represents the amount of electricity charged with respect to the battery capacity of the storage battery as a ratio (charging rate). The SOC operation width is the SOC range during storage battery operation.
The horizontal axis in FIG. 2 indicates the SOC of the storage battery 21, and the vertical axis indicates the open circuit voltage of the storage battery 21.
The allowable discharge voltage is the minimum value of the discharge voltage that prevents deterioration of the storage battery 21. When the voltage of the storage battery 21 falls below the allowable discharge voltage, it is determined that the overdischarge prevention circuit (not shown) of the storage battery 21 is in an overdischarge state. Thereby, the overdischarge prevention circuit of the storage battery 21 stops the discharge of the storage battery by the interlock in order to prevent the deterioration of the storage battery 21 due to overdischarge.
The allowable charging voltage is the maximum value of the charging voltage that prevents the storage battery 21 from being deteriorated. When the voltage of the storage battery 21 exceeds the allowable charging voltage, the overcharge prevention circuit of the storage battery 21 is determined to be in an overcharged state. Thereby, in order to prevent the deterioration of the storage battery 21 due to overcharge, the overcharge prevention circuit of the storage battery 21 stops the charging of the storage battery 21 by the interlock.
The relationship between the allowable charging voltage and the allowable discharging voltage and the SOC varies depending on the characteristics of the storage battery 21 and the number of cells of the storage battery 21 connected in series. Further, the allowable discharge voltage and the allowable charging voltage are determined by the characteristics of the storage battery 21.

In the storage battery 21, if the SOC is within the operating range, the open circuit voltage is always equal to or higher than the allowable discharge voltage and lower than the allowable charge voltage.
In the present embodiment, as the storage battery 21 of the storage circuit 2, a storage battery suitable for the SOC operating width in which the open circuit voltage is equal to or higher than the allowable discharge voltage and equal to or lower than the allowable charge voltage is used. For example, if the storage battery 21 is a lithium ion secondary battery, it is desirable that the operating range of the SOC be about 40% or more and about 60% or less. Further, the open circuit voltage of the storage battery 21 when the SOC is the lower limit value of the operating width is equal to the voltage of the overhead line power supply (normal overhead line voltage) when the motor 31 of the load circuit 3 is not generating regenerative power. Further, the open circuit voltage of the storage battery 21 when the SOC is the upper limit value of the operation width is equal to the voltage of the overhead line power supply (regenerative overhead line voltage) when the motor 31 generates regenerative power.
This prevents regenerative braking of the vehicle by the motor 31 of the load circuit 3 and prevents the charging voltage of the storage battery 21 of the storage circuit 2 from exceeding the allowable charging voltage when the motor 31 generates regenerative power. it can. Moreover, it can prevent that the open circuit voltage of the storage battery 21 falls below an allowable discharge voltage.

FIG. 1 shows a state of the vehicle system when the vehicle is traveling in the overhead line section.
When the vehicle is traveling in the overhead line section, the control circuit 4 closes the switch 12 of the current collecting circuit 1 and opens the switch 22 of the power storage circuit 2. As a result, the bypass circuit that bypasses the rectifier 23 and electrically connects the load circuit 1 (current collector 11) and the load circuit 3 to the storage battery 21 is blocked. Further, the load circuit 1 (current collector 11), the load circuit 3, and the storage battery 21 are electrically connected via the rectifier 23.
That is, the storage battery 21 of the storage circuit 2, the current collector circuit 1, and the load circuit 3 are connected via the switch 22 and the rectifier 23. At this time, the switch 22 of the storage circuit 2 is open, and the rectifier 23 regulates the current flowing from the storage battery 21 to the current collecting circuit 1 and the load circuit 3. Therefore, the electric power stored in the storage battery 21 is not supplied to the current collector circuit 1 and the load circuit 3.

On the other hand, the power supplied from the overhead power supply to the current collector 11 of the current collector circuit 1 is supplied to the load circuit 3 via the switch 12. That is, when the vehicle is traveling in the overhead line section, the motor 31 of the load circuit 3 is driven by the electric power supplied from the overhead line power supply via the current collector 11.
Further, the rectifier 23 of the storage circuit 2 allows a current to flow from the current collection circuit 1 and the load circuit 3 to the storage battery 21. Therefore, when the output voltage of the current collector circuit 1 exceeds the open circuit voltage of the storage battery 21, the power supplied from the overhead power supply to the current collector 11 is supplied to the storage battery 21. As described above, the open circuit voltage of the storage battery 21 is equal to the normal overhead line voltage when the SOC is the lower limit value of the operation width. Therefore, when the motor 31 does not generate regenerative power, the open circuit voltage of the storage battery 21 is the same as or higher than the output voltage of the current collector circuit 1.

In addition, when another vehicle running with the same overhead power supply performs regenerative braking and supplies regenerative power to the overhead power supply, the output voltage of the current collector circuit 1 may be higher than the open circuit voltage of the storage battery 21. . That is, the electric power supplied from the overhead line power supply via the current collector 11 is obtained by the regenerative braking of the vehicle (the host vehicle) on which the above-described vehicle system is mounted or other vehicles, so that the output voltage of the current collector 11 is When it becomes higher than the open circuit voltage, it is supplied to the storage battery 21.
Thereby, the vehicle system can supply the regenerative electric power generated in the motor 31 of the load circuit 3 by regenerative braking to the storage battery 21 when the host vehicle is traveling in the overhead line section, and can charge the storage battery 21.

FIG. 3 is a schematic block diagram illustrating the vehicle system when the vehicle is traveling in an overhead line-less section.
When the host vehicle is traveling in an overhead line-less section, the control circuit 4 opens the switch 12 of the current collecting circuit 1 and closes the switch 22 of the power storage circuit 2. As a result, the electrical connection between the current collector 11 of the current collector circuit 1 and the storage battery 21 of the power storage circuit 2 is released. Further, a bypass circuit that bypasses the rectifier 23 and electrically connects the storage battery 21 of the storage circuit 2 and the load circuit 3 is opened, and the storage battery 21 and the load circuit 3 are electrically connected via the switch 22. .
That is, the storage battery 21 of the storage circuit 2, the current collector circuit 1, and the load circuit 3 are connected via the switch 22 and the rectifier 23. At this time, since the switch 22 of the power storage circuit 2 is closed, power is supplied from the storage battery 21 to the load circuit 3. That is, when the vehicle is traveling in an overhead line-less section, the motor 31 of the load circuit 3 is driven by the electric power supplied from the storage battery 21.
When regenerative braking by the motor 31 is performed, when the output voltage of the load circuit 3 becomes higher than the open circuit voltage of the storage battery 21, regenerative power by the motor 31 is supplied to the storage battery 21 and the storage battery 21 is charged. .

Thus, the vehicle system of this embodiment includes the rectifier 23 described above. The rectifier 23 is provided in parallel with the switch 22 provided between the storage battery 21 and the motor 31, and allows a current to flow from the current collector 11 and the motor 31 to the storage battery 21, and from the storage battery 21 to the current collector 11 and the motor 31. Regulate the flowing current. Thereby, a current flows from the motor 31 to the storage battery 21 even when the host vehicle is traveling in the overhead line section. For this reason, the regenerative electric power which generate | occur | produces in the motor 31 by regenerative braking can be supplied to the storage battery 21, and the storage battery 21 can be charged.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to that described above, and various design changes can be made without departing from the scope of the present invention. Is possible.

(Second Embodiment)
FIG. 4 is a schematic block diagram showing the configuration of the vehicle system according to the second embodiment.
The vehicle system according to the second embodiment includes a power storage circuit 102 and a control circuit 104 instead of the power storage circuit 2 and the control circuit 4 of the first embodiment, and further includes a braking circuit 51 and a mechanical brake 52. Other circuits have the same configuration as that of the first embodiment.

The power storage circuit 102 includes the power storage circuit 2 according to the first embodiment and further includes a switch 24 and an ammeter 25.
The switch 24 is connected to the rectifier 23 in series.
The ammeter 25 measures the current value between the rectifier 23 and the storage battery 21.
In addition to the function of the control circuit 4 of the vehicle system according to the first embodiment, the control circuit 104 has an allowable charging current value in which the current value measured by the ammeter 25 is the maximum current that can be input to the storage battery 21. Has a function of opening the switch 24.

When braking the vehicle, the braking circuit 51 determines whether or not the current collector 11 of the current collecting circuit 1 is in contact with the overhead line power source and the current value measured by the ammeter 25 is the allowable charging current value of the storage battery 21. It is determined whether or not the vehicle is exceeded, and the vehicle is braked based on the determination. Specifically, when the braking circuit 51 determines that the current collector 11 is not in contact with the overhead line power source and determines that the current value of the ammeter 25 exceeds the allowable charging current value of the storage battery 21, The brake 52 is used for braking.
The mechanical brake 52 is a mechanical brake that uses air pressure or hydraulic pressure, and does not generate regenerative power due to braking.

As described above, the vehicle system according to the present embodiment switches the switch when the regenerative current exceeding the allowable charging current value of the storage battery 21 is generated from the motor 31 of the load circuit 3 when the host vehicle is traveling in the overhead line section. Open 24. This prevents the regenerative current from flowing into the storage battery 21 and supplies the regenerative current to the overhead power supply. For this reason, the overcharge of the storage battery 21 can be prevented.
Further, when a regenerative current exceeding the allowable charging current value of the storage battery 21 is generated from the motor 31 of the load circuit 3 while the vehicle is traveling in an overhead line-less section, the braking circuit 51 performs braking by the mechanical brake 52. Do. Thereby, generation | occurrence | production of the regenerative electric power in the motor 31 can be suppressed.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to
For example, in the present embodiment, the power storage circuit 102 includes the rectifier 23 and the switch 24, and controls the supply of power to the storage battery 21 using these. However, the vehicle system is not limited to this. For example, an electronic switch such as a thyristor is provided instead of the rectifier 23 and the switch 24, and the control circuit 4 controls the thyristor, thereby controlling the supply of power to the storage battery 21. You may do it.
Further, in the present embodiment, the case where the supply of power to the storage battery 21 is suppressed when the current value measured by the ammeter 25 exceeds the allowable charging current value of the storage battery 21 has been described. However, the vehicle system is not limited to this, and includes, for example, a voltmeter that measures the open circuit voltage of the storage battery 21 instead of the ammeter 25, and the voltage value measured by the voltmeter exceeds the allowable charging voltage value of the storage battery 21. In some cases, supply of power to the storage battery 21 may be suppressed. The control circuit 104 may refer to the SOC of the storage battery 21 and open the switch 24 when the SOC of the storage battery 21 exceeds a predetermined value (charge rate).

In the present embodiment, the case where the vehicle system includes the mechanical brake 52 and the braking by the mechanical brake 52 is performed when the current value measured by the ammeter 25 exceeds the allowable charging current value of the storage battery 21 has been described. However, the vehicle system is not limited to this. For example, the vehicle system may include a regenerative resistor that replaces the mechanical brake 52 and consumes electric power generated by the regenerative brake by converting it into heat energy. The braking circuit 51 may be configured to apply regenerative braking by consuming electric power with a regenerative resistor when it is determined that the current value exceeds the allowable charging current value of the storage battery 21.

(Third embodiment)
FIG. 5 is a schematic block diagram showing the configuration of the vehicle system according to the third embodiment.
The vehicle system according to the third embodiment includes a control circuit 204 instead of the control circuit 104 of the second embodiment, and further includes a position information acquisition circuit (current position acquisition unit) 61 and a route information database 62.
The position information acquisition circuit 61 acquires the current position information of the host vehicle based on data obtained from a signal system, a wheel rotation sensor, or the like.
The route information database 62 holds information indicating whether each section included in the route on which the vehicle travels is an overhead line section or an overhead line-less section.

The control circuit 204 refers to the current position information output from the position information acquisition circuit 61 and the information held in the route information database 62. Based on these pieces of information, the control circuit 204 calculates the position of the boundary between the overhead line section and the overhead line-less section, the position of the host vehicle, and the distance and positional relationship between the host vehicle and the boundary. Based on the calculation result, the opening / closing of the switch 12 of the current collecting circuit 1 and the switch 22 of the power storage circuit 2 is controlled.

FIG. 6 is a first timing chart showing the control timing of the switch by the vehicle system according to the third embodiment.
The control circuit 204 refers to the current position information acquired by the position information acquisition circuit 61 and the route information database 62.
As a result of referring to the current position information and the route information database 62, the control circuit 204 determines that the vehicle is located in the overhead line section (the current position information is in the overhead line section), and the boundary position between the overhead line section and the overhead line-less section. When it is determined that the vehicle is located behind the vehicle in the traveling direction by a predetermined distance (for example, 10 meters), the switch 22 is closed. That is, the control circuit 204 closes the switch 22 and turns it on before the vehicle moves from the overhead line section to the overhead line-less section.
In addition, as a result of referring to the current position information and the route information database 62, the control circuit 204 determines that the vehicle is located in the overhead line section and that the vehicle travels a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the switch 12 is located in front of the switch 12, the switch 12 is opened. That is, the control circuit 204 opens the switch 12 and turns it off after the vehicle moves from the overhead line section to the overhead line-less section.
That is, when the vehicle moves from the overhead line section to the overhead line-less section, both the switch 12 and the switch 22 are closed (ON).

In addition, as a result of referring to the current position information and the route information database 62, the control circuit 204 has the vehicle positioned in the overhead line-less section (the current position information is in the overhead line-less section), and the overhead line section and the overhead line-less section. The switch 12 is closed when it is determined that the vehicle is positioned a predetermined distance behind the boundary position in the rearward direction of the vehicle. That is, the control circuit 204 closes the switch 12 and turns it on before the vehicle moves from the overhead line-less section to the overhead section.
The control circuit 204 refers to the current position information and the route information database 62. As a result, the vehicle is located in the overhead line-less section, and the traveling direction of the vehicle is a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the switch 22 is located in front of the switch 22, the switch 22 is opened. That is, the control circuit 204 opens the switch 22 and turns it off after the vehicle moves from the overhead line-less section to the overhead line section.
That is, when the vehicle moves from the overhead line-less section to the overhead line section, both the switch 12 and the switch 22 are closed (ON).

Thereby, the vehicle system prevents the power supplied from the current collector 11 or the storage battery 21 from being interrupted. Therefore, the load circuit 3 can be stably operated. In particular, since the power supply to the auxiliary machine connected to the SIV 33 is stably performed, it is possible to prevent the indoor lighting from being temporarily turned off. Thereby, a passenger's anxiety can be eliminated.

FIG. 7 is a second timing chart showing the switch control timing by the vehicle system according to the third embodiment.
Here, the control circuit 204 is provided so that the open circuit voltage and capacity of the storage battery 21 and the voltage of the overhead power supply can be referred to. The control circuit 204 refers to the current position information and the route information database 62 when the open circuit voltage of the storage battery 21 is greater than the voltage of the overhead power supply by a predetermined threshold or more, or when the capacity of the storage battery 21 is smaller than the predetermined threshold. . Based on these pieces of information, the control circuit 204 calculates the position of the boundary between the overhead line section and the overhead line-less section, the position of the host vehicle, and the distance and the positional relationship between the host vehicle and the boundary. And based on the said calculation result, opening and closing of a switch is controlled at the timing shown in FIG.

That is, the control circuit 204 refers to the current position information and the route information database 62, and as a result, the vehicle is located in the overhead line section, and the traveling direction of the vehicle is a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the switch 12 is positioned behind, the switch 12 is opened without closing the switch 22 (in an open state). That is, the control circuit 204 opens the switch 12 and turns it off before the vehicle moves from the overhead line section to the overhead line-less section.
In addition, as a result of referring to the current position information and the route information database 62, the control circuit 204 determines that the vehicle is located in the overhead line section and that the vehicle travels a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the switch 22 is located in front of the switch 22, the switch 22 is closed. That is, the control circuit 204 closes the switch 22 and turns it on after the vehicle has moved from the overhead line section to the overhead line-less section.
That is, when the vehicle moves from the overhead line section to the overhead line-less section, both the switch 12 and the switch 22 are in an open state (OFF).

In addition, as a result of referring to the current position information and the route information database 62, the control circuit 204 determines that the vehicle is in the overhead line-less section and that the vehicle travels a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the switch is positioned rearward in the direction, the switch 22 is opened without closing the switch 12 (in an open state). That is, the control circuit 204 opens the switch 22 and turns it off before the vehicle moves from the overhead line-less section to the overhead line section.
In addition, as a result of referring to the current position information and the route information database 62, the control circuit 204 determines that the vehicle is in the overhead line-less section and that the vehicle travels a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the switch is located in the front of the direction, the switch 12 is closed. That is, the control circuit 204 closes the switch 12 and turns it on after the vehicle moves from the overhead line-less section to the overhead line section.
That is, when the vehicle moves from the overhead line-less section to the overhead line section, both the switch 12 and the switch 22 are in an open state (OFF).

This prevents the vehicle system from suddenly supplying power from the storage battery to the overhead line power supply due to the potential difference between the storage battery 21 and the overhead line power supply. Therefore, deterioration of the storage battery 21 due to the storage battery 21 supplying power exceeding the allowable discharge power can be prevented.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to
For example, the control circuit 204 may refer to the SOC of the storage battery 21 and open the switch 24 when the SOC of the storage battery 21 exceeds a predetermined value (charge rate).

The above vehicle system has a computer system inside. The operation of the control circuit 4 described above is stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer reading and executing this program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

Further, the program may be for realizing a part of the above-described functions. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

Next, an embodiment of the traffic system of the present invention will be described.
The traffic system of this embodiment includes a vehicle (not shown) on which any of the vehicle systems described in the first to third embodiments described above is mounted, and an overhead wire shown in FIG. 1, FIG. 4, or FIG. With power supply. The vehicle system may have a plurality of vehicles or one vehicle. In the above traffic system, for example, power may be supplied to the overhead line power supply by a DC feeding system. Although illustration is omitted, the above transportation system includes, for example, a transformer provided in a substation, a rectifier that converts an alternating current output from the transformer into a direct current, a storage battery that stores power, and a charge / discharge of the storage battery. You may include the storage battery control apparatus to control. When the vehicle system has a plurality of vehicles, it becomes possible to supply regenerative electric power generated by a certain vehicle to other vehicles via an overhead line power supply.
According to the traffic system of this embodiment, since the DC / DC converter is not used in the vehicle system mounted on each vehicle, a sufficient space for the vehicle can be secured. Moreover, when each vehicle is traveling in the overhead line section, the power (regenerative power) generated in the motor included in the load circuit can be supplied to the storage battery of the vehicle system mounted on each vehicle.
Note that the above transportation system includes a new transportation system in addition to the railway. The new transportation system may include a vehicle having a vehicle body, rubber tires, an electric motor, and guide wheels. Further, the new transportation system may include an overhead wire power source and a guide rail for supplying electric power to the traveling road on which the rubber tire rolls and the electric motor.

An aspect of the present invention is a vehicle system mounted on a vehicle and capable of supplying power from an overhead power source. The vehicle system includes a parallel circuit, a current collector, a first switch, a second switch, and a rectifier. According to this vehicle system, electric power can be supplied from the load circuit to the storage battery when the vehicle is traveling in the overhead line section without using the DC / DC converter.

DESCRIPTION OF SYMBOLS 1 ... Current collection circuit 2, 102 ... Power storage circuit 3 ... Load circuit 4, 104, 204 ... Control circuit (control part) 11 ... Current collector 12 ... Switch 21 ... Storage battery 22 ... Switch 23 ... Rectifier 24 ... Switch 25 ... Ammeter 31 ... motor 32 ... VVVF inverter 33 ... SIV 51 ... braking circuit 52 ... mechanical brake 61 ... position information acquisition circuit (current position acquisition unit) 62 ... route information database

Claims (8)

1. A vehicle system mounted on a vehicle and capable of supplying power from an overhead power source,
   A parallel circuit including a load circuit and a storage battery connected in parallel;
   A current collector connected in series to the parallel circuit and provided so as to be electrically connectable to the overhead power supply;
   A first switch provided between the current collector and the parallel circuit;
   A second switch provided between the storage battery and the load circuit and between the current collector and the storage battery;
   Connected in parallel with the second switch, provided between the storage battery and the load circuit, allowing current to flow from the current collector and the load circuit to the storage battery, and from the storage battery to the current collector and the load A rectifier that regulates the current flowing into the circuit;
   Is provided.
2. It has a control unit that controls the opening and closing of the switch,
   When the current collector and the overhead line power supply are electrically connected, the control unit closes the first switch and opens the second switch, and the current collector and the overhead line power supply are electrically connected to each other. The vehicle system according to claim 1, wherein the first switch is opened and the second switch is closed when the first switch is not connected.
3. A third switch provided in series with the rectifier;
   The vehicle system according to claim 2, wherein the control unit opens the third switch when a charging rate of the storage battery exceeds a predetermined charging rate.
4. A current position acquisition unit for acquiring current position information of the vehicle;
   The section included in the route on which the vehicle travels is an overhead line section in which the current collector is electrically connected to the overhead power supply, or a section in which there is no overhead line in which the current collector is not electrically connected to the overhead power supply A route information database showing whether there is,
   With
   The control unit refers to the current position information and the route information database, the vehicle is located in the overhead line section, and the vehicle is a predetermined distance from a boundary position between the overhead line section and the overhead line-less section. When it is determined that the vehicle is located behind the traveling direction, the second switch is closed, and it is determined that the vehicle is located in the overhead line section and located in front of the traveling direction by a predetermined distance from the boundary position. The first switch is opened, and when it is determined that the vehicle is located in the overhead line-less section and is located a predetermined distance behind the boundary position, the first switch is closed. The second switch is opened when it is determined that the vehicle is located in an overhead line-less section and located in front of the traveling direction by a predetermined distance from the boundary position. The vehicle system according to any one of al claim 3.
5. A current position acquisition unit for acquiring current position information of the vehicle;
   The section included in the route on which the vehicle travels is an overhead line section in which the current collector is electrically connected to the overhead power supply, or a section in which there is no overhead line in which the current collector is not electrically connected to the overhead power supply A route information database showing whether there is,
   With
   The control unit refers to the voltage and capacity of the storage battery and the voltage of the overhead line power supply, and when the voltage of the storage battery is larger than the voltage of the overhead line power supply by a predetermined threshold value or when the capacity of the storage battery is a predetermined threshold value If it is smaller, the current position information and the route information database are referred to, the vehicle is located in the overhead line section, and the vehicle is located at a predetermined distance from the boundary position between the overhead line section and the overhead line-less section. When it is determined that the vehicle is located rearward in the traveling direction, the first switch is opened with the second switch opened, the vehicle is located in the overhead line section, and the vehicle is located at a predetermined distance from the boundary position. When it is determined that the vehicle is positioned ahead in the traveling direction, the second switch is closed, the vehicle is positioned in the overhead line-less section, and the traveling is performed by a predetermined distance from the boundary position. The second switch is opened with the first switch opened, the vehicle is located in the overhead line-less section, and the vehicle is located at a predetermined distance from the boundary position. The vehicle system according to any one of claims 1 to 3, wherein the first switch is closed when it is determined that the first switch is positioned forward in the traveling direction.
6. The load circuit includes a motor that drives the vehicle when power is supplied, and generates regenerative power by the motor when the vehicle performs regenerative braking,
   The allowable charging voltage value of the storage battery is equal to or higher than the voltage of the overhead power supply when the load circuit generates regenerative power, and the allowable discharge voltage value of the storage battery does not cause the load circuit to generate regenerative power. The vehicle system according to any one of claims 1 to 5, which is equal to or lower than a voltage of the overhead power supply.
7. When the current collector and the overhead line power supply are electrically connected, the current collector and the load circuit bypass the rectifier by closing the first switch and opening the second switch. And disconnecting the detour that electrically connects the storage battery and the current collector and the load circuit and the storage battery are electrically connected via the rectifier,
   When the current collector and the overhead line power supply are not electrically connected, by opening the first switch and closing the second switch, the electrical connection between the current collector and the storage battery can be established. The vehicle system control method according to claim 1, wherein the vehicle system is released and the bypass circuit is opened to electrically connect the storage battery and the load circuit via the second switch.
8. A traffic system comprising: a vehicle on which the vehicle system according to claim 1 is mounted; and an overhead power supply that supplies electric power to the vehicle.

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