JP2008054383A - Power storage device for vehicle - Google Patents

Abstract

An object of the present invention is to provide a method of performing a converter operation in an inverter circuit and eliminating the converter circuit.
A charging operation from an AC power source to a storage battery is performed by operating an inverter circuit as a converter. The discharging operation is performed by supplying power to the load by performing an inverter operation on the DC power source of the storage battery. In this inverter circuit, the inverter operation and the converter operation are performed, and the inverter operation and the rectification operation are performed to eliminate a circuit for rectifying the AC power source exclusively. Since the rectifier 4 can be eliminated by performing the converter operation using the inverter 4 and using the inverter 4 with a built-in freewheel diode, the components can be simplified.
[Selection] Figure 1

Description

The present invention relates to a railway vehicle facility, and relates to a power storage device for power charging during station stop and power discharge during traveling between stations when there is no power feeding facility between stations and there is a power feeding facility at a station.

A conventional apparatus will be described below with reference to the circuit diagram of FIG. 1 is an AC power source, 2 is a rectifier, 3 is a storage battery, 4 is an inverter, 5 is an AC reactor, 6 is an AC capacitor, 7 to 9 are switches, 10 is a transformer, and 11 is a load. In FIG. 3, charging operation is given by alternating current using 1 as a power source, converted to direct current by 2, and charged to 3.

During the charging operation, the switch 8 and the switch 9 are in an open state, the inverter 4 does not operate, and the power supply to the load 11 is supplied directly from the AC power supply 1 with the switch 7 closed.

During the discharging operation, the switch 7 is in an open state, the switches 8 and 9 are closed, the inverter 4 operates as a PWM inverter with the storage battery 3 as a power source, and the AC reactor 5 and the AC capacitor 6 are rectangular. Is converted into a sine wave, boosted to a required voltage by the transformer 10, and supplied to the load 11.
JP 2005-278269 A

In FIG. 3, there are a rectifier 2 used for a charging circuit and an inverter 4 used for a discharging circuit. The inverter 4 has a built-in free wheel diode, and the rectifier 2 is eliminated by using the inverter 4 for charging, and a simple circuit is provided.

In other words, means for achieving the purpose are: In claim 1, an AC power source connected to an open switch, an AC inductance connected in series with an AC capacitor connected in parallel to the power source side where the load and the transformer are connected to the power source and the transformer, A vehicle power storage device that is capable of being charged in a vehicle power storage device that is bridge-connected to an inverter circuit and has a storage battery that is charged with power.

2. An inverter connected to the storage battery, an AC inductance connected in series, an AC capacitor connected in parallel, a storage side connected to the transformer, and a load-side vehicle power storage device consisting of a load connected in series to the transformer In the vehicle power storage device, the storage battery can be discharged.

As described above, according to the present invention, it is possible to eliminate the rectifier 4 by performing the converter operation using the inverter 4 and using the inverter 4 with a built-in freewheel diode, which will be described later, so that the components are simplified. And practically very useful.

    The embodiment will be described below with reference to FIGS.

FIG. 1 is a circuit diagram showing an embodiment of the present invention. This will be described below with reference to FIG. In the charging operation, the AC power source 1 is used as a power source, the switch 7 is closed, and the voltage is raised to a required voltage by the transformer 10. The boosted voltage closes the switch 9 and the inverter 4 is charged to the storage battery 3 by the converter operation via the AC capacitor 6 and the AC reactor 5. Power is supplied to the load 11 simultaneously with the charging operation by closing the switch 7.

In the discharging operation, the switch 7 is opened, the AC power source 1 is cut off, the switch 9 is closed, the DC power source is the storage battery 3 and the inverter 4 outputs a rectangular voltage by the PWM operation, and the AC reactor 5 and the AC capacitor 6 make a sine wave. And is input to the transformer 10 via the switch 9. The voltage is stepped down to a required voltage by the transformer 10 and power is supplied to the load 11.

FIG. 2 is a circuit diagram showing an embodiment of the present invention. This will be described below with reference to FIG. In the charging operation, the AC power source 1 is used as a power source, the switch 7 is closed, and the voltage is raised to a required voltage by the transformer 10. The boosted voltage closes the switch 8, passes through the AC capacitor 6 and the AC reactor 5, is rectified by the free wheel diode of the inverter 4, and is charged in the storage battery 3. Power is supplied to the load 11 simultaneously with the charging operation by closing the switch 7.

In the discharging operation, the switch 7 is opened, the AC power source 1 is cut off, and the switch 8 is also opened. The switch 9 is closed, the DC power source is the storage battery 3, the inverter 4 outputs a rectangular voltage by PWM operation, is generated into a sine wave by the AC reactor 5 and the AC capacitor 6, and is input to the transformer 10 via the switch 9. The The voltage is stepped down to a required voltage by the transformer 10 and power is supplied to the load 11.

It is a block diagram which shows one Example of this invention. (Example 1) It is a block diagram which shows one Example of this invention. (Example 2) It is a block diagram which shows an example of the past.

Explanation of symbols

1 AC Power Supply 2 Rectifier 3 Storage Battery 4 Inverter 5 AC Reactor 6 AC Capacitor 7 Switch 8 Switch 9 Switch 10 Transformer 11 Load

Claims (2)

AC power supply connected to open switch, power supply side with load and transformer connected to power source, AC inductance connected in series with AC capacitor connected in parallel to transformer, bridge connected to inverter circuit A power storage device for a vehicle, which is capable of being charged in a power storage device for a vehicle comprising a charging side in which electric power is charged to a storage battery. An inverter connected to the storage battery, an AC inductance connected in series, an AC capacitor connected in parallel, a storage side connected to the transformer, and a load-side vehicle power storage device consisting of a load connected in line to the transformer A power storage device for vehicles, wherein the storage battery can be discharged.

Images