SU649110A1

SU649110A1 - Contact-free converter for power supply of plating bath

Info

Publication number: SU649110A1
Application number: SU741994127A
Authority: SU
Inventors: Юрий Александрович Васильев; Александр Владимирович Осипенков
Original assignee: Предприятие П/Я Р-6491
Priority date: 1974-02-01
Filing date: 1974-02-01
Publication date: 1979-02-25

Description

(54) БЕСКОНТАКТНЫЙ ПРЕОБРАЗОВАТЕЛЬ ДЛЯ ПИТАНИЯ ГАЛЬВАНИЧЕСКИХ ВАНН(54) CONTACTLESS CONVERTER FOR POWER SUPPLY OF GALVANIC BATHTUBS

Известны бесконтактные преобразователи дл питани гальванических ванн, содержащие трехфазный реверсивный управл емый выпр митель 1. Такие преобразователи сложны.Non-contact transducers for electroplating baths are known that contain a three-phase reversible controlled rectifier 1. Such transducers are complex.

Известен бесконтактный преобразователь дл питани гальванических ванн, содержащий трехфазный трансформатор, вторичные обмотки которого соединеныв звезду и обмотка третьей фазы включена встречно по отношению к двум другим, четыре тиристора, три из которых соединены по схеме нулевого выпр мител и подключены к вторичным обмоткам трансформатора, нулева точка которого и обща точка тиристоров соединены с выходными Зажимами устройства, а четвертый тиристор включен встречно по отношению к двум другим и одним электродом соединен с общей точкой тиристоров, и четыре блока управлени тиристорами, причем блоки управлени тиристорами второй и третьей фазы подключены к этим же фазам, а блок управлени обратным тиристором подключен ко второй фазе 2.A contactless converter for powering electroplating baths is known. of which the common point of the thyristors is connected to the output clips of the device, and the fourth thyristor is connected in opposite with respect to two other and one electrode is connected to s point of thyristors, and four control unit thyristors, said control units thyristors second and third phases are connected to the same phase and reverse thyristor control unit is connected to the second phase 2.

Недостатком известного устройства вл етс сложность трансформатора.A disadvantage of the known device is the complexity of the transformer.

Цель изобретени - упрощение устройства .The purpose of the invention is to simplify the device.

Поставленна цель достигаетс тем, что обратный тиристор вторым электродом подключен к вторичной обмотке третьей фазы блок управлени тиристОром первой фазы подключен к третьей фазе.The goal is achieved by the fact that the reverse thyristor is connected by a second electrode to the secondary winding of the third phase and the thyristor control unit of the first phase is connected to the third phase.

Claims

FIG. 1 is a schematic diagram of the device; in fig. 2 - graphically shows the curve of the resulting current. When transformer 1 is turned on into a three-phase network, direct current through thyristors 2, 3 and 4 with an interval of 30 ° is applied to the load. A reverse current of two thirds of the half-cycle of the supply direction is not applied to the load through the reverse thyristor 5 at times when there is no direct current. Thyristors 2, 3, 4 and 5 are included from control units 6, 7, 8 and 9, respectively. In this case, the pulses including the thyristors of the second 3 and third phase 4 are synchronized with the voltage of the same phases. The pulses, including the thyristor of the first phase 2, are synchronized with the voltage of the third phase with the help of transformer 10, and the pulses, including reverse thyristor 5, are synchronized with the voltage of the second phase with the help of transformer 11. current is carried out using resistors 12, 13, 14 and 15. Formula of the invention. Non-contact converter for supplying electroplating baths containing a three-phase transformer, the secondary windings of which are connected in stars y, a third phase of winding the counter is enabled with respect to the other two, four thyristor, three of which are connected at zero rectifier circuit and connected to the secondary windings of the transformer, which zero point and the overall point of thyristors soe0

-fA dinene with output pins, and the fourth thyristor is connected in opposite to the other two and one electrode is connected to the common point of the thyristor, as well as four thyristor control units, the second and third phase thyristor control units are connected to the same phases A reverse thyristor is connected to the second phase, characterized in that, for the purpose of simplification, the reverse thyristor is connected to the second phase of the third phase, the first phase thyristor control unit is connected to the third phase for the second electrode. Sources of information taken into account in the examination 1. Semiconductor rectifiers. Ed. Kovalev F.I. and others. M., “Energie, 1967.

2. USSR author's certificate number 229681, cl. H 02 M 7/12, 1967.

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