CS222809B1 - Unit of the control circuit for the control of tyristor systems - Google Patents

Description

SUMMARY OF THE INVENTION The present invention is a control circuit unit for controlling thyristor systems comprising a printed circuit board with individual electronic components that is disposed beneath the housing cap. The printed circuit board with a complete electronic circuit is galvanically connected to the inside of the lid by strip power and control cables, while being mechanically fastened. The lid is inserted inside the housing into the housing. Tape power and control connections are terminated as screw connections or as flat connector terminals (pins).

The present invention relates to a control circuit unit for controlling both discrete and thyristor systems arranged in modules.

The common characteristic of electronic relays or so-called optomodules, as reported by the semiconductor component manufacturers, is the galvanic isolation of the control signal input by optical coupling - a light-emitting diode and phototransistor system - with guaranteed electrical strength of the mutual isolation of these elements.

Usually, the entire power range of these products is produced, from the smallest PCB-mounted products to the products designed to switch current of several tens of amperes. Mostly, the control circuits of these components are designed specifically for this purpose as integrated or hybrid circuits.

The power elements used in these products are very often triacs, symistors, and are always housed in a common housing with control circuits. This solution brings some disadvantages especially in case of failure or second part of the product.

The solution of the control circuit unit for the control of thyristor systems according to the invention removes this drawback and consists in that the printed circuit board with a complete electronic circuit is galvanically connected to the inner side of the lid by strip power and control cables, while side into the case.

The control circuit unit for controlling the thyristor systems of the invention makes it possible to use commonly produced discrete electronic components without the need for a special hybrid or integrated circuit. Another advantage of the separate arrangement of the control and power part is the possibility of replacing one or the other part separately in the event of failure.

Claims (7)

SUBJECT A control circuit unit for controlling thyristor systems, comprising a printed circuit board with individual electronic components housed under a housing lid, characterized in that the printed circuit board (3) with a complete electronic circuit is galvanically connected to the inside of the lid (1) by tape power supply (4J and junction (6) inlets, while mechanically fastening, the lid (11j being inserted inside the housing (2)). Control circuit unit for controlling thyristor systems according to claim 1, characterized in that the strip feed (4j and control (6) terminals are terminated as screw connections (7) or as flat connector terminals (pins). 3. The control circuit unit for controlling thyristor systems according to items 1 and 2, in the drawing is an example of an embodiment of the control circuit unit for controlling thyristor systems. Fig. 1 is a housing cover with a printed circuit board, Fig. 2 is a housing of a control circuit unit, and Fig. 3 is a view of the top side of the terminal housing. A printed circuit board 3 with a complete electronic circuit is connected to the inner side of the lid 1 (Fig. 1) by means of ribbon supply 4 and control 6 leads. The ribbon power leads 4 terminate as screw connections 7. The control circuit unit housing 2, provided with feet with mounting holes, has a recess 9 in the bottom surface of the base. The control circuit unit according to the invention comprises a small number of mechanical components and allows easy assembly. The printed circuit board 3 carrying the control circuit components is directly brazed to the flat power leads 4 and control signal leads S passing through the cap 1, thereby ensuring the reliability and stability of the interconnections with minimum external interconnection requirements. The compact unit thus formed is cast into the casing 2 (Fig. 2) by a synthetic resin casting compound. Embedding the components increases the shock resistance and insulation strength of the circuit. The recess 9 in the bottom surface of the base of the housing 2 creates a heat insulating gap to limit heat transfer to the unit when co-located on a heat sink with other semiconductor elements. The control circuit unit separate from the power element housing is designed as a universal optoelectronically controlled unit, usable either with potential-free modules or to control some discrete-element discrete-time applications instead of conventional pulse transistor controllers. The invention is characterized in that the housing (2) is provided with feet with holes for receiving the unit. 4. The control circuit unit for controlling the thyristor systems of claims 1, 2 and 3, characterized in that a recess (9) is provided in the lower surface of the base of the housing (2). 5. The control circuit unit for controlling the thyristor systems according to claim 1, characterized in that the inner space of the housing (2) is encapsulated with potting compound. 6. A control circuit unit for controlling thyristor systems according to claim 1, characterized in that the lid (1j) is glued to the housing (2). 7. The control circuit unit for controlling the thyristor systems according to claim 1, characterized in that the lid (11) is bonded to the housing (2).