JPH09215108A - Vehicle control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the function from lowering by dividing the filter capacitor for auxiliary CVCF inverter into the capacity of filter capacitor for VVVF inverter and a differential capacity and connecting the differential capacitor with the filter capacitor for VVVF inverter in switching. SOLUTION: AC three-phase power is fed from a pantograph 1 through a high speed circuit breaker 2 to a plurality of filter reactors 3, capacitors 4a-4d, and VVVFs 5a-5d. It is also fed through a high speed circuit breaker 7 with a filter reactor 8, filter capacitors 11, 12 and a CVCF inverter 10 for auxiliary power supply. The switch 9d out of switches 9a-9d is switched to the VVVF inverter 5d upon failure of the CVCF inverter 10. The CVCF inverter 10 is used for auxiliary power supply supplying power to miscellaneous loads, e.g. cooling load, by inverting DC power into CVCF power. When the CVCF inverter 10 is operated, the capacitors 11, 12 are connected in parallel through the switch 9a to provide a required capacity. According to the arrangement, external disturbance can be eliminated while sustaining the function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle control device.

[0002]

2. Description of the Related Art The electrostatic capacity of a filter capacitor of a VVVF inverter is determined by the electrical sum of the filter capacitor capacities of a plurality of inverter devices viewed from the power supply side, while the CVCF inverter is a VVVF inverter for the purpose of an auxiliary power supply device. Separately, the capacitance of the filter capacitor is independently determined as one inverter device. In a vehicle control device that adopts a system in which one of a plurality of VVVF inverters is switched to a CVCF inverter in an inverter device having such two filter capacitors, the capacity of the filter capacitor is different before and after switching, and the filter effect is reduced. There was a problem that the orbit relay would malfunction.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is VVV.
Even when the F inverter is switched to the CVCF inverter for auxiliary power supply, the electrostatic capacity of the filter capacitor maintains the same capacity as before the switching, thereby deteriorating the function of the filter device and adversely affecting the external devices such as the track relay. Another object is to provide a good vehicle control device.

[0004]

A filter capacitor of a CVCF inverter for an auxiliary power supply is previously divided into a capacitance of a VVVF filter capacitor and a differential capacitance, and the differential capacitor is linked to a switching device and the differential capacitor is a VVVF filter capacitor. To be electrically connected to. FIG. 1 shows a circuit diagram of a vehicle control device in which the capacitance of the filter capacitor of the VVVF inverter is C ₁ and CVC
F The capacitance of the filter capacitor of the inverter device is C
C ₀ if ₀ minute capacitance of C ₀ = C ₁ + C _X next CVCF capacitance of the filter capacitor of the inverter C _X than VVVF has a large value. Therefore, as shown in FIG. 2, the capacitance of C ₀ is divided into C ₁ and C _X in advance, and the capacitance of the VVVF inverter that switches to CVCF control by connecting C _X in conjunction with the switching means is It is possible to maintain the same capacitance as the CVCF inverter before switching.

[0005]

FIG. 3 shows an embodiment of the present invention.

1 is a pantograph, 2 is a plurality of VVVF
A high speed circuit breaker on the side of the inverter device, 3 is a filter reactor, and 4 is a filter capacitor. 5 is VVVF
The inverter device converts the direct current taken in from the pantograph into a three-phase alternating current, and supplies power to the driving electric motor 6. Reference numeral 7 is a high speed circuit breaker of a CVCF inverter circuit for auxiliary power supply.
Reference numeral 8 is a filter reactor of the CFVC inverter.
The switch 9 switches the VVVF inverter device 5d to the CVCF inverter when the CVCF inverter device 10 fails. Reference numeral 10 is a CVCF inverter device for an auxiliary power source, which converts a direct current taken in from a pantograph into a three-phase alternating current having a constant voltage and a constant frequency, and supplies electric power to a cooling system of a train through a transformer. Reference numeral 11 is a filter capacitor C ₁₁ , which has the same capacity as the VVVF inverter. 12 is also a filter capacitor C _X. When the CVCF inverter 10 operates, the capacitors C ₁ and C _X are connected in parallel by the switch 9a.

When the CVCF inverter 10 fails,
When the switch 9 is operated to switch to the A side, the filter capacitor C _X 12 becomes the filter capacitor C of the inverter device 5d.
_It is connected in parallel with ₁ to obtain a given capacitance.

[0008]

According to the present invention, even if the auxiliary power supply inverter side fails and the VVVF inverter is switched to CVCF, the same electrostatic capacitance of the filter capacitor as before the switching can be maintained, so that the same filter effect as before the switching can be maintained. Also, it is possible to solve the problem of malfunction of the external orbital relay and help improve the performance of the inverter device.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a vehicle control device.

FIG. 2 is an explanatory diagram of division of a filter capacitor of a CVCF inverter unit.

FIG. 3 is a circuit diagram of one embodiment of the present invention.

[Explanation of symbols]

4a-4d ... Filter capacitor of VVVF inverter device, 5a-5d ... VVVF inverter device, 8 ... Filter reactor, 9a-9d ... Switching device, 10 ... CVCF
Inverter device 11, 12, ... CVCF inverter filter capacitor.

Claims (1)

[Claims] 1. A plurality of VVVF inverter devices and electrostatic capacities of DC filter capacitors of the inverter devices,
A vehicle control device including a CVCF inverter device for an auxiliary power supply that requires a filter capacitor having a large electrostatic capacity and a means for switching one of a plurality of VVVF inverters to a CVCF inverter when the CVCF inverter device fails. In this case, when the electrostatic capacity of the filter capacitor for the CVCF inverter is divided into two parts, the electrostatic capacity of the filter capacitor for the VVVF inverter and the capacity of the difference, and when the VVVF inverter is switched to the CVCF inverter, A vehicle control device having a switching device that maintains the same capacitance as the capacitance of a filter capacitor of a CVCF inverter.