JPS59193008A - Transformer for ac regenerative vehicle - Google Patents

Abstract

PURPOSE:To increase regenerating electric energy of a transformer for AC regenerative vehicle by a method wherein a third winding to feed electric power to electric apparatuses except driving motors, and a second winding to feed electric power to the driving motors are arranged in order respectively on both sides of a first winding to receive supply of electric power from a trolley wire. CONSTITUTION:A winding 1 to receive supply of electric power from a catenary, a winding 2 to feed electric power to electric vehicle driving motors, and a winding 3 to feed electric power to electric apparatuses in an electric vehicle except the driving motors are furnished to a transformer for AC regenerative vehicle. The winding 2 is divided into windings 2-1, 2-2. The winding 3 is arranged on both the sides of the winding 1, the windings 2-1, 2-2 are arranged in order at the outside thereof, and the winding 3 is made to the approached condition to the winding 1 and the windings 2-1, 2-2. By arranging the windings in such a way, regenerating electric energy to the winding 3 from the winding 2 can be increased without increasing voltage regulation of the winding 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an AC regenerative vehicle transformer, and particularly to the arrangement of each winding thereof.

[Background of the invention]

Since the start of AC electrification and the practical application of Cyrisk, research has begun on AC regenerative vehicles.

AC regenerative vehicles use the electric car drive motor as a generator when applying the brakes, and generate braking force by returning the generated power to the ridge source.

This method cannot obtain braking force unless there is a load that can effectively use the regenerated electric power, and the amount of regenerated electric power is also small, which negates the benefits. It was put into practical use only in the ward. recent years,
AC regenerative vehicles are being reconsidered due to limited energy resources, but the small amount of regenerated electricity remains a major obstacle.

In general, an AC regenerative vehicle transformer consists of a first winding that takes in power from the vehicle, a second winding that supplies power to the viscosity transmission for driving the first commercial train, and a second winding that takes power from the electric train. Electrical equipment other than military equipment for actual use (electrical equipment with capacity -+ of 10 to 10% of each misfortune) and a third winding that supplies the nof. During the winding, the windings are supplied from the first winding 1 to the second winding 2 and the third winding 3, respectively, as shown by arrows 48 in FIG.

During regenerative braking, electric power is supplied from the second winding 2 to the first winding 1 and the third winding 3, respectively, as shown by the arrows C and 2 of the second winding. However, if you are far from the substation during regenerative braking and there are no powered vehicles nearby, the amount of electric power regenerated through the first volume resistance 1 will be:
The impedance of the overhead wires and the impedance of the substation act to reduce the value. In addition, in the conventional winding arrangement, in order to reduce the voltage fluctuation rate of the third winding 3, the first winding 1 and the third winding 3 are arranged close to each other as shown in FIG. Therefore, the impedance between the second winding 2 and the third winding 3 was large, and the amount of regenerated electric power in the direction of the second arrow 2 was small.

[Purpose of the invention]

The purpose of the present invention is to eliminate the drawbacks of the prior art described above, and to
An object of the present invention is to provide an AC regenerative transformer for a vehicle that can increase regenerative power from a second winding to a third winding without increasing the voltage fluctuation rate of the winding.

[Summary of the invention]

To achieve this objective, the present invention provides a first winding that receives power from the overhead wire, a second winding that supplies power to the electric motor that drives the I0 train, and a drive motor that is located within the electric train. tJ
In the AC regenerative vehicle transformer equipped with a third winding that supplies electrical equipment to electrical equipment other than f and lJ machines, the first
It is assumed that the third winding and the second winding are sequentially arranged on both sides of the winding.

Figure 3 is a diagram showing the circuit constants of this glazed vehicle transformer, where Xl and I'll are the reactance and resistance of the first winding, and X2-11 (2 is the reactance and resistance of the second winding). ,
X3. R is the reactance and resistance of the third winding ring.

Considering this diagram, the amount of regenerated power from the second winding to the third winding is affected by the reactance X2 and resistance of the second winding, the reactance X of the third winding, and the resistance. It can be seen that the reactance X3 and resistance R2 of the third winding affect the reactance X1 and resistance of the first winding, as well as the reactance X3 and resistance R2 of the third winding.

In addition, since the resistance mass is very small compared to the reactance X, ~X, it is necessary to pay particular attention to the reactances X, ~X, and IIC.

[Embodiments of the invention]

Next, the arrangement of each winding in the embodiment of the present invention will be explained while comparing it with the conventional arrangement. When the second winding 2 is divided into 2-1 and 2-2 as shown in FIG. 4, the arrangement of each winding is shown in FIGS. 5 and 6. As shown in FIG. 5, a conventional transformer has a first winding 1, a second winding 2-. 1.2-2
The third winding 3 is interposed between the first winding 1 and the first winding 1, and the second winding 2-1, 2-
There is a distance between the two. On the other hand, in the transformer according to the embodiment of the present invention, as shown in FIG. 6, the third windings 3 are arranged on both sides of each of the first windings 1.
．． 2-2 are arranged in sequence, and the third winding 3 is in close proximity to the first winding 1 and the second winding 2-1, 2-2.

Hereinafter, it will be explained that the winding arrangement of this embodiment can increase the regenerative power from the second side wire to the third winding without increasing the voltage fluctuation rate of the third winding. i is eliminated by the reactance (hereinafter expressed as %IX) K.

%IX between the first and third windings in the transformer shown in Figure 5
,,A are determined by the following equation (1).

Here, M: average winding length N,: number of turns of the third winding +s: Rogowski coefficient E,: no-load voltage of the third winding ■3: rated current of the third winding %IX between 3 windings2. A is determined by the following equation (2).

(2) Here, Δ2 is the axial width of the second winding, and δI2 is the interval in the tlQf1 direction between the first and second windings (both 81!
(See Figure 7). Although k13 varies slightly depending on the winding structure, it is treated as the same because it has little effect on the whole.

Next, the percent reactance between each winding lj of the transformer shown in FIG. 6 is shown. %lX1 for 1st winding and 3rd winding
3'' is determined by the following equation (3), and the %IX and sB between the two straw windings and the third winding are determined by the following equation (4).

......(3) ......(4) In addition, Δ1. Δ2. Δ3. δ, 2. δ2. See Figure 8 for the dimensions of each winding.

Here, %I X of the above formula (1), odd and %I of the formula (3)
Comparing X, 3", %I X13A"'%I
It can be seen that "X...".

In addition, %i X23A of formula (2) and %IX of formula (4),
,'' are compared as δ1.kiδ23, and the result is equation (5).

From this equation (5), it can be seen that %IX23A>%IX,"7 follows.

In this way, real ability 1! Depending on the volume arrangement of example i, %I
Since X and 3 are the same as before, the voltage fluctuation rate of the third winding (
%I (approximately proportional to On the other hand, %I The amount of regenerative power to the gland can be increased.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to increase the amount of regenerated electric power from the gIs 2 winding to the third winding without increasing the voltage fluctuation rate of the third winding. As a result, without increasing the capacity of the third winding, the amount of regenerated electricity to the auxiliary equipment in the same electric train can be increased, improving its efficiency and helping electricians save energy. can be achieved.

[Brief explanation of the drawing]

Figures 1 and 2 are block diagrams showing the direction of power supply when the AC regenerative transformer is running and regenerating.
The figure is an equivalent circuit diagram showing the circuit constants of the windings in the transformer, Figure 4 is a connection diagram of an AC regenerative transformer, Figure 5 is a winding arrangement diagram of the conventional transformer shown in Figure 4, and Figure 6 is a diagram showing the circuit constants of the windings in the transformer. The drawings are a winding layout diagram of a transformer according to an embodiment of the present invention in FIG. 4, a winding dimensional diagram in FIG. 5, and FIG. 8 a winding dimensional diagram in FIG. 6. 1...First winding, 2.2-1 to 2-6...
...Second winding, 3...Third winding. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7ri! J Figure 8

Claims (1)

[Claims] 1 The first winding that receives power from the rakusho, the second winding that supplies power to the motor that drives the electric car, and the second winding that supplies power to electrical equipment other than the driving electric stock in the electric car. An alternating current regenerative vehicle transformer comprising three coupling wires, characterized in that the third winding and the second winding are sequentially arranged on both sides of the first winding. Pressurizer.