JP3149765B2 - Vehicle control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle control device.

[0002]

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

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide VVV
Even when the F inverter is switched to the auxiliary power supply CVCF inverter, the capacitance of the filter capacitor is maintained at the same value as before the switching, thereby deteriorating the function of the filter device and adversely affecting external devices such as track relays. Another object of the present invention is to provide a good vehicle control device.

[0004]

The filter capacitor of the CVCF inverter for the auxiliary power supply is divided into the capacity of the filter capacitor for VVVF and the capacity of the difference in advance, and the capacitor for the difference is changed in conjunction with the switching device. To be electrically connected to FIG. 1 shows a circuit diagram of a vehicle control device, in which the capacitance of a filter capacitor of a VVVF inverter is C _1, and CVC
Let the capacitance of the filter capacitor of the F inverter device be C
If it is set to ₀ , C ₀ becomes C ₀ = C ₁ + C _X , and the capacitance of the filter capacitor of the CVCF inverter has a larger value of C _X than VVVF. Thus the capacitance of the VVVF inverter switching to CVCF controlled by installing by dividing the capacitance of C ₀ beforehand C ₁ and C _X, C _X is connected in conjunction with the switching means as shown in FIG. 2 The same capacitance as the CVCF inverter before switching can be maintained.

[0005]

FIG. 3 shows an embodiment of the present invention.

[0006] 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 from the pantograph into a three-phase alternating current and supplies power to the driving motor 6. Reference numeral 7 denotes a high-speed circuit breaker of an auxiliary power supply CVCF inverter circuit.
8 is a filter reactor of the CFVC inverter.
The switch 9 switches the VVVF inverter 5d to the CVCF inverter when the CVCF inverter 10 has failed. Reference numeral 10 denotes a CVCF inverter for an auxiliary power supply, which converts a direct current taken from a pantograph into a three-phase alternating current having a constant voltage and a constant frequency, and supplies electric power to a train cooling or the like via a transformer. 11 is a VVVF inverter and the same capacity in the filter capacitor C _11. Reference numeral 12 is a filter capacitor _CX . By the switching device 9a when the CVCF inverter 10 operates, the capacitor C ₁ and C _X has a parallel connection.

When the CVCF inverter 10 fails,
Operating the switcher 9 is switched to the A side filter capacitor C _X 12 is a filter capacitor C of the inverter 5d
₁ is connected in parallel to obtain a predetermined capacitance.

[0008]

According to the present invention, even when the auxiliary power supply inverter side fails and the VVVF inverter is switched to CVCF, the same capacitance of the filter capacitor as before switching can be maintained, so that the same filtering effect as before switching can be maintained. In addition, the problem of malfunction of the external track relay can be solved and the performance of the inverter device can be improved.

[Brief description of the 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 to 4d: Filter capacitors of VVVF inverter device, 5a to 5d: VVVF inverter device, 8: Filter reactor, 9a to 9d: Switching device, 10: CVCF
Inverter devices 11, 12, ... filter capacitors of CVCF inverter.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60L 9/18 B60L 1/00 H02H 7/00 H02P 7/63 302

Claims (1)

(57) [Claims] 1. A DC power supply via a first filter capacitor.
To convert the direct current to three-phase alternating current and
A plurality of VVVF inverter that supplies power to motive, DC
Connected to a power supply via a second filter capacitor having a larger capacitance than the first filter capacitor ,
Is converted to a constant voltage and constant frequency alternating current,
A CVCF inverter device for a source, the case CVCF inverter device failure, CVCF inverter one of the auxiliary power supply of the plurality of VVVF inverter
A controller for switching to a device, wherein the second filter capacitor has a plurality of capacitances.
And the VVVF inverter is connected to the CVCF
When switching to an inverter device, the CVCF inverter device
In the first filter capacitor of the above, the capacitance is
Via a part of the second divided filter capacitor
And a DC power supply connected thereto .