JPS5956873A - Energy transfer device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an energy transfer device that transfers electromagnetic energy stored by a superconducting coil, unipolar generator, etc. to a load.

[Technical background of the invention]

Conventionally, when transferring electromagnetic energy accumulated in a superconducting coil, etc. to an inductive load, a three-phase bristle connection is used, and an energy storage coil made of superconducting, etc. is connected to the DC terminal of the dazyristor converter, and the energy storage coil is connected to the AC terminal side. Normally, a commutation capacitor is connected, and the alternating current voltage generated across the capacitor of the commutation capacitor is converted back into direct current to excite the f3 load coil. In other words, energy is transferred using a self-excited silice inverter.

FIG. 1 is a schematic configuration diagram showing an example of a conventional energy transfer device, in which 1 is an energy storage coil, 2 is an inverter, for example, a thyristor converter 1. ? a, 3b,
,? Gyanoggiter for commutation, 4 is load, 5, 7
is a thyristor converter, 6 and 8 are converter transformers, 2x
+2y +2z +2u +2v, 2w is a thyrisk element, 9 is a charging resistor, and 1θ is a switch.

The operation of the energy transfer device configured as above will be explained. In order to store electromagnetic energy in the energy storage coil 1, a cyrisk converter 5. A DC power supply constituted by a transformer 6 causes a thyristor converter 2 to have a thyrisk 2x.

A DC current is applied to the circuit consisting of 2u and coil 1,
Accumulates the energy of coil 7KV2LI2. Here, the inductance of the Lu coil and ■ is the DC current value.

On the other hand, commutating capacitors 3 a are connected to AC terminals a+ b r C of the three-phase bridge-connected Cyrisk converter 2, respectively.
* 3 b + 3 c is (≦Jichi!ζ2) Y connection, or in other words, it is tangent to 6 connection f-¥1:. 1
The DC current flowing in the Cyrisk converter 2 a, b,
An alternating current voltage is generated between each of the terminals of c, and energy is supplied to the load 4, but in order to generate alternating voltage, and before the start of operation, a converter transformer 8 and a cyrisk converter 7 are installed. When the switch 10 is closed, the charging resistor 9 and the switch 1 are
0 to the commutation carrier, 7g, and 3b to a voltage of a certain magnitude (leave it at -.) Initial charging can also be done by the action of sirisk converters 5 and 2, but this time A method using a charging device will be explained. When transferring electromagnetic energy from the energy storage coil 1 to the load 4, the thyristor 2 v r 2w+ 27 of the thyristor converter 2
+ 2z is in a current-blocking state and the DC current is passed through the Cyrisk converter 5. Zyristor 2X r 2u r Energize through the circuit of energy storage coil 1. Commutation gear e-jitter J
A r J b are charged to e and O polarities as shown in the figure. Thyristor 2 v, 2 w r 2 y +
2z is in a non-energized state, and a thyristor converter similar to the thyristor converter 2 is provided on the load 4 side to prevent discharge.

If the switch 1θ is started at the same time as the energy transfer command, and then the thyristor 2vlC dart signal is given to enable energization, the charges in the commutation capacitors 3a and 3b will be transferred to point b of the thyristor converter 2, and thyristor 2 v H2u +
If a discharge occurs in the path of point a of the thyristor converter 2, and the discharge current is larger than the DC' Ichihara, and there is no gate signal to the thyristor 2u, the thyristor 2u will be in a current blocking state,
The current flowing through the energy storage coil 1 is transferred to the Cyrisk converter 5. Thyristor 2x, point a of thyrisk converter 2, and commutation capacitor 3a.

3b, 2 V continues to flow through the commutation capacitor, ? a, , 11) are charged in the opposite direction.

Next, after a certain voltage is reached between the atb points, or after a certain period of time has elapsed, a gate signal is given to the thyristor 2w to transfer the charge in the commutating capacitor 3b to the commutating xenoxciter 3c, the 0 point of the thyristor converter 2, and the thyristor 2. w, 2y
It is discharged in the path of point b of the thyristor converter 2 and commutated from thyristor 2v to thyristor 3w. The current of 1 is Cyrisk 2K
+ point a of thyristor converter 2, commutation capacitor/P jitter 3a + 3 c + thyristor converter 2 r Flow at point C, iris 2w, commutating capacitor/P jitter 3a.

3c to generate a voltage between points a and c of the thyristor converter. Thereafter, in the same way, thyristors 2y and 2ur
By sequentially firing the condyles of 2Z+2v+2x+2vt, an alternating current is generated between points a and b, between points b and C, and between points c and C.
((pressure is generated and if load 4 is an inductive load, i, iI
After converting to i, 6if;, it becomes possible to excite,
That is, the electromagnetic energy of the energy storage coil 1 can be transferred to the load 4 side.

[Problems with background technology]

However, in the configuration of the conventional device described above, when converting DC to AC using the Cyrisk converter 2, the commutation capacitors 3a to 3c must be charged or a separate commutation circuit must be installed. The circuit must be installed and the circuit complicated, and problems such as commutation failure occur at the beginning of operation.

[Purpose of the invention]

It is an object of the present invention to provide an energy transfer device that does not require initial charging of a commutation carrier, can omit a charging device, and facilitates initial commutation.

[Summary of the invention]

The present invention provides energy storage devices such as electromagnetic energy;
In a system that transfers energy by converting direct current to alternating current through a cyrisk converter, the above purpose is achieved by using a dart tongue-off cyrisk for at least one phase of the cyrisks that are connected in a three-phase bridge. It is something.

[Embodiments of the invention]

The present invention will be explained below with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIG.

Reference numeral 11 in FIG. 2 is a dirt turn-off thigh risk, which is used in place of the thigh risk 2x of In Mark 2 in FIG. The gate turn-off thyristor 11 is an element that can cut off the current flowing through the gate turn-off thyristor 1 only by a dirt signal, and other characteristics are almost the same as those of the thyristor.

In addition to the above-mentioned points, the difference from the conventional device shown in FIG. Cyrisk converter 7° Charging resistor 9. This is because the switch 10 is not provided.

The operation of the energy transfer device configured as described above will be explained.

(1) Energy storage action gate turn-off Thyristors 1 and 2u are energized, and the other thyristors are de-energized. A DC voltage is generated by the thyristor converter 5, and a current is caused to flow through the path of the dirt turn-off thyristor 1, the thyristor 2u, and the energy storage coil 1, and energy is stored in the energy storage coil 1. After a certain current is reached, the thyristor converter 5 is short-circuited (bypass bare, etc.), and the current of the energy storage coil 1 is circulated through the circuit of the dirt turn-off thyristor and the thyristor 2u.

(n) According to the transfer command during energy transfer, a dart signal is sent to thyristor 2z to enable energization, and then an off signal is given to the dirt of dirt turn-off thyristor 1 to cut off the current of dirt turn-off thyristor 11. . In other words,
A current of 1 to turn off the current is commutated to the current of 2z. The current of the energy storage coil 1 is the thyristor 2z, the commutation capacitor + j c + J a
+Circuit 2 u circuit flows 5, Iij, +: Divert carrier i4 jitter 3c + 3a is charged. Now, the current is 1, the energization time is T, the commutation capacitor, ? a,
If the electrostatic capacitance discharge of 3c is C, then there is 2 I T/ between a and c.
A voltage of C is generated.

By detecting this voltage value or sequentially igniting other cyrisks at certain time intervals, a.
An alternating current voltage can be generated between b and c. In other words, the firing order after thyristor 2z is thyristor 2v.

Tart Turn Off Sailisk 11. Thyristor 2w, 2
y, 2ur 2Z.

As described above, by using the electromagnetic energy of the energy storage coil 1 to generate AC voltage on the lines a, b, and c,
The load 4 can be used as AC power or as DC power after conversion to DC. This results in the transfer of electromagnetic energy in the energy storage coil 1 to the load 4 and 2.

In this way, by using a cell turn-on circuit, commutation can be easily carried out since initial charging does not require a charging circuit or a charging device. The main part of this embodiment is shown in which a three-phase bridge or a multi-phase bridge in which an inverter 2 is composed of semiconductor elements is entirely composed of dirt turn-off thyristors 11.

By doing so, commutation can be easily performed from any dirt turn-off thyristor 11, and an energy transfer device without commutation failure can be provided. FIG. 4 shows the main part of the third embodiment of the present invention, in which the load 4 is a coil 14 (inductance), 5 am is a thyristor, and 1 am is a turn-off thyristor 13. The power converter 12 is configured with a three-phase bridge-connected power converter 12.

In the case of such an inductive load, after electromagnetic energy is transferred to the coil 14 under the control of the power converter 12, the electromagnetic energy can be transferred back to the energy storage coil 1, which makes it possible to effectively utilize the energy. .

〔Effect of the invention〕

According to the present invention described above, a charging circuit for a commutation cano-four jitter is unnecessary, the commutation action is easy, and the energy transfer device is capable of stable operation, is extremely economical, and has a simple circuit configuration. can be provided.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing an example of a conventional energy transfer device, Fig. 2 is a schematic configuration diagram showing a first embodiment of the energy transfer device of the invention, Figs. The second. FIG. 7 is a schematic configuration diagram showing only essential parts of a third embodiment. 1... Energy storage coil, 2, 12... Thyristor converter, 3a r 3b + 3c... Commutation capacitor, 2u+2v, 2W, 2x, 2y. 2z... Thyristor, 4... Load, 5.7... Thyristor converter, 6, 8... Converter transformer, 9...
・Charging resistor, 10... switch, l l, 1
．． 9... Dirt turn-off thyristor, 14...
·coil. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 L Engineer

Claims (2)

[Claims] (1) A multiphase semiconductor power converter that converts electrical energy stored in superconducting coils, unipolar generators, etc. into direct current, converts this direct current into alternating current, and a multiphase semiconductor power converter that is connected to the alternating current side of this semiconductor power converter. An energy transfer device for transferring energy to a load via a commutation carrier and a converter, wherein the semiconductor power converter has at least one portion of the dirt off-the-wall. . (2) A first multiphase semiconductor power converter that converts electrical energy stored in superconducting coils, unipolar generators, etc. into direct current, and converts this direct current into alternating current, and an alternating current side of this semiconductor power converter. The energy transferred to the inductive load can be transferred to the superconducting coil, unipolar generator, etc. via a second multiphase semiconductor power converter. 1. An energy transfer device capable of reverse transfer, wherein the second multiphase semiconductor power converter has at least one gate turn-off thyristor.