DE202009014759U1 - Semiconductor relay with integrated mechanical switching element for load circuit interruption (hybrid relay) - Google Patents

Abstract

A semiconductor relay (1) having an output power switch (4) which can be actuated by a control current or a control voltage via the control inputs (11, 12) and is non - contact switching and has a mechanical switching element (2) connected in series with the output power switch (4), characterized in that consisting of an upper housing part (16) and a lower housing part (17) and the snap-in connections (20) positively and releasably connected, compact housing integrated the switching element (2) and brought out the manual operating lever or switch position indicator (3) on the top (16a) is.

Description

The The invention relates to a semiconductor relay, with a through a control current or a control voltage operable output power switch, the corresponding to a voltage applied to the control input control signal open or closed. Such a semiconductor relay is also known as Solid State Relay (SSR).

These Semiconductor relays are state of the art, in addition to designs as a pure switch also versions with integrated monitoring circuits for the Load circuit are common. In the known semiconductor relay is the load circuit is opened or closed by the control signal at the control input. An additional one Abschaltpfad, for example, even with a defective, for example, short-circuited Output circuit breaker can cause an interruption of the load circuit must be realized by external switching elements. This requires one higher Space requirement in the control cabinet and increased wiring costs the episode.

Of the present invention is the general object of a generic semiconductor relay to provide the disadvantages as they are comparable devices According to the prior art, to eliminate.

These Task is solved by adding to the prior art semiconductor relay an additional, mechanical switching element for interrupting the load circuit at minimally possible Construction volume and one for the manual operation advantageous arrangement is integrated.

This mechanical and in its switching behavior bistable switching element is either over manually a hand actuator or opened or closed by an electrical control signal.

The Interruption of the load circuit by the mechanical switching element can thus both from the outside by hand as well as purely electrically by a in the control electronics the semiconductor relay integrated logic can be brought about.

The inventive semiconductor relay draws in particular by small and compact design and made possible by the integrated in the load circuit and easily accessible from the outside mechanical switching element the interruption of the load circuit, for example, even when shorted Output power switch. This should be in the event of a fault consumer side damage prevents and the availability of machinery and equipment.

For example, higher-level damage can occur due to overheating of injection units of injection molding machines occur and a high production committee or production losses as well as repair costs have as a consequence.

Of the The invention is based on a first embodiment, which is illustrated in the drawings, explained in detail.

In show the drawings:

1 : Block diagram of a semiconductor relay with integrated mechanical switching element

2 : Perspective exterior view of the semiconductor relay according to the invention as a whole

3 : Perspective bottom view of the semiconductor relay according to the invention

4 : Perspective exploded view of the semiconductor relay of 2 and 3

in the Below is a preferred embodiment of the invention with Reference to the attached Drawings described.

1 shows a block diagram of a semiconductor relay according to the invention 1 , in which a bistable, electromechanical relay 2 with switch position indicator and manual override 3 is integrated. The relay 2 is connected in series with the output circuit breaker 4 connected; in this case an antiparallel switched thyristor pair.

A current in the load circuit, connection via the load connections 5 and 6 , can only train if the output circuit breaker 4 via its control input, an optically isolated switch 7 , is controlled or in case of error, the output circuit breaker 4 is short-circuited and at the same time the output contact 8th of the electromechanical relay 2 closed is. An internal logic 9 monitored in the example above via the current transformer 10 continuously the current flowing in the load circuit and controls in case of error, z. B. when detected short circuit of the thyristors 4 , the relay 2 to its output contact 8th open and thus interrupt the flow of current in the load circuit.

2 shows a perspective view of the outer geometric design of the semiconductor relay according to the invention 1 , in its very small and compact design. The intended for the interruption of the load circuit mechanical switching element 2 is in the semiconductor relay 1 arranged so that it is approximately flush with its top 16a concludes. The hand actuator 3 who at the same time as Switch position display for the output contact 8th is thus very accessible to the operator.

The control connections 11 . 12 of the optically isolated switch 7 as well as the auxiliary voltage connections 13 . 14 to supply the logic 9 , are also in the upper housing part 16 arranged on the front, allowing for the installation and wiring of the solid state relay 1 required space requirement is kept small. The wiring for the control terminals 11 . 12 and auxiliary voltage connections 13 . 14 Required connectors are front and vertical to the solid state relay 1 plugged, which saves space in the mounting plane. The connectors themselves are in the 2 not shown.

3 shows the substantially cuboid or cuboid SSR 1 out 2 in a perspective view from below with the base plate 18 , which is required for a safe, optimal heat transfer to the heat sink, not shown here, or cooling plate. To ensure this, the solid state relay needs to go through the two attachment points 15a . 15b be securely fastened by means of screws on the heat sink or on the cooling plate.

4 is an exploded perspective view showing the complete structural design of the semiconductor relay according to the invention 1 from 2 shows. In the housing base 17 is the semiconductor device 19 on the base plate 18 , directly touching, mounted.

The relay module 24 is on the semiconductor board 19 mounted and with this both mechanically and electrically via the contact pins 25 and other contact points connected.

The upper housing part 16 is on the lower housing part 17 fitted and by means of two snap connections 20 positively and detachably connected. The two snap connections on the housing system 20 of which only one in 2 Shown are through the bottom of the case 17 introduced snap-in openings 21 . 22 and the positional snaps 23 of the upper housing part 16 educated. Such a connection technique of the shell-shaped housing parts is inexpensive, space-saving and even contributes to the desired compact design of the semiconductor relay 1 at.

1

Solid-state relays, hybrid relay

2

Relay, switching element

3

Manual operation, Switch position indicator, manual control lever

4

Output circuit breakers, thyristors

5

terminal

5a

screw

6

terminal

6a

screw

7

optical isolated switch

8th

output contact

9

logic

10

Power converter

11 12

Control connections, control inputs

13 14

Auxiliary supply

15a, 15b

attachment points

16

Housing top

16a

top, front

16b 16c, 16d

front opening

17

Housing bottom

18

baseplate

19

Semiconductor package

20

snap

21 22

Snap opening

23

snap lug

24

relay module

24a, 24b

PCBs

25

contact pins

Claims (7)

Semiconductor relay ( 1 ) with one by a control current or a control voltage via the control inputs ( 11 . 12 ) operable and contactless switching output circuit breaker ( 4 ) and in series with the output circuit breaker ( 4 ) switched mechanical switching element ( 2 ), characterized in that in the from an upper housing part ( 16 ) and a housing lower part ( 17 ) and via the snap connections ( 20 ) form-fitting and releasably connected, compact housing the switching element ( 2 ) and its manual operating lever or switching position indicator ( 3 ) on the top ( 16a ) is led out. Semiconductor relay ( 1 ) according to claim 1, characterized in that the integrated in the housing system mechanical switching element ( 2 ) either manually via the manual control lever ( 3 ) or electrically via an integrated logic ( 9 ) formed control signal is switched. Semiconductor relay ( 1 ) according to claim 1 or 2, characterized in that in the event of an error by means of the evaluation circuit and logic provided in the circuit ( 9 ) an interruption of the between the terminals ( 5 . 6 ) lying load circuit via the switching element ( 2 ) is brought about. Semiconductor relay ( 1 ) according to one of claims 1 to 3, characterized in that the interruption of the between the connecting elements ( 5 . 6 ) lying load circuit via the switching element ( 2 ) in the case of a defective output circuit breaker ( 4 ) is brought about. Semiconductor relay ( 1 ) according to one of claims 1 to 4, characterized in that the from an upper housing part ( 16 ) and housing lower part ( 17 ) existing housing system is designed essentially cube or cuboid. Semiconductor relay ( 1 ) according to one of claims 1 to 5, characterized in that the control terminals ( 11 . 12 ) and the auxiliary voltage connections ( 13 . 14 ) in the front ( 16a ) are arranged. Semiconductor relay ( 1 ) according to one of claims 1 to 6, characterized in that the manual operating lever ( 3 ) of the switching element ( 2 ) has the additional function of a switch position indicator.