WO2012095367A1

WO2012095367A1 - Device and method for controlling a switch drive of an electric switch

Info

Publication number: WO2012095367A1
Application number: PCT/EP2012/050175
Authority: WO
Inventors: Heinz Eugen Klüppel; Jürgen Riemenschneider
Original assignee: Siemens Aktiengesellschaft
Priority date: 2011-01-14
Filing date: 2012-01-06
Publication date: 2012-07-19
Also published as: EP2663985A1; ES2527270T3; CN103299383A; EP2663985B1; DE102011002685B3; CN103299383B

Abstract

The invention relates, inter alia, to a device (4) for controlling a switch drive (M) of an electric switch with a control apparatus (10), which is suitable for evaluating an input signal, which is present at a binary input (6a, 6b, 6c) of the device (4) on the input side and which is produced by means of an external operating voltage (Usk), and for controlling the switch drive (M) according to the input signal present on the input side. According to the invention, the device (4) has a reference voltage circuit (50), which is suitable for creating an internal reference voltage (Ui) by means of the external operating voltage (Usk), the device has a pre-processing apparatus (70, 71, 72), which is suitable for producing a binary signal (B70, B71, B72) by means of the input signal present at the binary input (6a, 6b, 6c), the logic level of said binary signal depending on the level of the input signal and the level of the reference voltage (Ui), and the control apparatus (10) of the device (4) is connected indirectly or directly to the pre-processing apparatus (70, 71, 72) and evaluates the binary signal (B70, B71, B72) of the pre-processing apparatus (70, 71, 72).

Description

description

Device and method for controlling a switch drive of an electrical switch

The invention relates to a device having the features according to the preamble of patent claim 1.

German Patent DE 10 2007 041 972 B3 discloses a device for controlling a switch drive of an electrical switch with a control device which is suitable for evaluating an input signal present at a binary input of the device, generated with an external operating voltage, and controlling the switch drive make in response to the input side lying at ^¬ input signal.

The invention has for its object to provide a device of the type described, which is particularly universally applicable.

This object is achieved by a device with the features according to claim 1. Advantageous embodiments of the device according to the invention are specified in subclaims.

Accordingly, the invention provides that the device has a reference voltage circuit which is adapted to generate to the external operating voltage of an internal reference voltage, the apparatus comprising a preprocessing unit which is adapted to generate with the signal present at binary input signal is a binary signal of the ^¬ sen logical level of the height of the input signal and the height of the reference voltage depends, and the control device of the device is directly or indirectly in communication with the pre-processing means and the binary signal of the pre-processing means evaluates. A significant advantage of the device according to the invention is the fact that it can be used for very different ex ^¬ ternal operating voltages. In contrast to previously known devices, the device according to the invention is capable of evaluating input signals present on the input side as a function of the operating voltage with which these input signals have been formed. For this purpose, it is provided according to the invention to generate an internal reference voltage dependent on the external voltage and to evaluate the input signals present at the binary input or the binary inputs by using the internal reference voltage. In contrast to the prior art devices, it is possible to use the device for various input signals, since it is possible namely to form an internal reference voltage and heranzuzie ^¬ hen that takes into account the expected level of the input side input signals.

The internal reference voltage is preferably smaller than the external operating voltage. Particularly preferably, the inter ^¬ ne reference voltage is generated such that it - apart from an et ^¬ offset offset (voltage offset value) - is proportional to the ex ^¬ tern operating voltage, so it applies before ^¬ preferably:

Ui ~ Uextern - Uoffset, where Ui denote the internal reference voltage, Uextern the external operating voltage and Uoffset the possible offset. For example, Uoffset can be zero.

According to a preferred embodiment of the device it is provided that the device has a switching element which allows or prevents a current flow from the binary input through the Vorverarbei ^¬ processing device in dependence on the height of the input ^¬ signal and the height of the reference voltage, and the logic level of the binary signal depends on the current ^¬ flow through the preprocessing. For example, the switching element can allow a flow of current from the binary input through the preprocessing device, if the difference between the height of the input signal and the height of the reference voltage exceeds or falls below a predetermined minimum value.

It is considered advantageous also when the Vorverarbei ^¬ processing device is closed with an input terminal to the binary input and to an output terminal of the switching element at ^¬.

The preprocessing device preferably has an optocoupler which, on the output side, generates the binary signal, where ^¬ at the logic level of the binary signal depends on the current flow through the preprocessing device. An optocoupler advantageously enables potential separation.

The reference voltage circuit preferably has a voltage divider, for example a resistive voltage divider.

The voltage divider may, for example, have a divider terminal to which the reference voltage is applied, and the divider terminal and the output ^{terminal of} the preprocessing ^device may be connected to the switching element.

The switching element is preferably a transistor or at least also has a transistor. The transistor may be a bipolar transistor. The divider terminal is preferably connected to the base terminal of the Transis ^¬ sector and the output terminal of the pre-processing preferably to the emitter terminal.

The invention further relates to a method for controlling a switch actuator of an electrical switch where ^¬ off at an inlet side fitting to a binary input, generated with an external operating voltage input signal evaluated and the control of the switch drive in dependence ^¬ speed of the input side applied input signal is pre ^¬ taken.

According to the invention is in this respect provided that an internal reference voltage, a binary signal is generated by the signal present at binary input signal whose logic level depends on the level of the input signal and the level of reference clamping ^¬ voltage is generated by the external operating voltage, and the binary signal is evaluated.

With regard to the advantages of the method according to the invention, reference is made to the above statements in connection with the device according to the invention, since the advantages of the method according to the invention essentially correspond to those of the device according to the invention.

The invention will be explained in more detail with reference to Ausführungsbeispie ^¬ len; thereby show by way of example

Figure 1 shows an embodiment of a device for

Controlling a switch drive of an electrical switch,

2 shows an exemplary example of a Binäreingangsmo ^¬ dul for the apparatus of Figure 1, and

3 shows a further embodiment of a binary ^¬ input module for the device of FIG. 1

For the sake of clarity, the same reference numerals are used in the figures for identical or comparable components.

1 shows an exemplary embodiment of a Vorrich ^¬ tung 4 for controlling a switch mechanism M of a non-white ^¬ ter illustrated electrical switch. The device 4 comprises connections AI to A5 and one preferably as Semiconductor circuit formed H-bridge circuit 9 and a control device 10 and various preferably designed as semiconductor circuits control modules 11 to 12 for driving and retrieval of analog locks

(Control module 11) and / or binary feedback (control module 12).

The device 4 also comprises a binary input module 13, which is connected to binary inputs 6a, 6b and 6c of the device 4 ^¬ . The binary inputs 6a, 6b and 6c are acted upon in ^¬ example via switches Sl, S2 and S3 with an external operating voltage, which is, for example, a control circuit voltage Usk for a control circuit SK of the device 4, a load circuit voltage Ulk for a load circuit LK Device 4 or can act at a different predetermined voltage. In the following example, it is assumed that the external operating voltage is the control circuit voltage Usk for the control circuit SK.

For switching on and off of the control circuit voltage Usk for the control circuit SK and the load circuit voltage Ulk for the load circuit LK switching elements 14 and 15 are provided. The switching elements 14, 15 are preferably relay contacts, which are controlled directly or indirectly by the control device 10.

After switching on the one or more switching elements 14, 15, the associated switching relay is maintained, for example via an auxiliary ^¬ winding (= latching). The shutdown then takes place via the control device 10 on the basis of a control signal. For example, the device 4 switches off automatically approx. 1.5 s after the last command has been processed, if no new command is pending.

To monitor the power supply to the H-bridge circuit 9, and the switching elements 14 and 15, a surveil ^¬ monitoring module 16 may be provided that to the switching elements 14 and 15 is connected. In case of a Funktionsaus ^¬ case or a malfunction, the supply of the H-bridge circuit 9, in particular the control elements, and the switching element 14 for the load circuit LK can be switched off by the monitoring module 16 ^¬ .

In addition, 10 further operating and / or safety functions can be realized by means of the control device and used for driving or switching the switch drive M or other elements, such as display elements or Ansteuerele- elements. Some examples of programmable operating and / or safety radio ^¬ tions are described.

For example, the switch drive M upon reaching an end position of the resources, such. B. of

Three-position disconnector with the end positions "disconnector on", "OFF", "earthing on". The overrun time of the switch drive M and the braking times are freely programmable. After expiry of the specified braking time and release for manual operation, the motor circuit is automatically opened and released for manual operation. In addition, the device 4 can lock when switching the switch drive to manual mode.

By means of the electronic control can be identified errors, such as wrong direction of rotation of the switch drive M, malfunction of the mechanism of the switch drive, load voltage is missing or no feedback from the auxiliary switch, visualized. For this purpose, 10 display elements can be controlled by means of the control device. Depending on the type of control, the display elements can shine permanently or blin ^¬ kend. It can display different levels of interference, the display elements with different clocked flashing light, z. B. with Tf = 0.5 s or Tf = 2 s are controlled. Furthermore, the Rückmeide- and monitoring times of switching operations can be freely programmed. Furthermore, with blocked switch drive M, the motor current can be limited in time. In addition, further suitable control and / or message functions for the operation and safety of the switch drive M can be realized by means of the control ^device 10.

Depending on the type of power supply, DC or AC voltage, associated voltage transformers 17, 18, in particular AC / DC or DC / DC converters, are provided between the H-bridge circuit 9 and the respective circuit to be supplied - control circuit SK and load circuit LK , For galvanic isolation of the control circuit SK and the load circuit LK and the internal voltage circuits of the device 4, for example opto ^¬ coupler 19 can be used.

In the figure 1 it can be seen that the Binäreingangsmo ^¬ dul 13 a reference voltage circuit 50 which is adapted to generate a proportional to the external operating voltage of internal reference voltage Ui. In the embodiment according to FIG. 1, the control circuit voltage Usk is used as the external operating voltage, so that the control circuit voltage Usk is applied to the reference voltage circuit 50 as an external operating voltage.

The binary input module 13 further has a scarf Tele ^¬ element 60 to which the internal reference voltage Ui of the reference voltage circuit 50 is applied.

To the switching element 60 three preprocessing devices are connected, which are indicated in the figure 1 by the reference numerals 70, 71 and 72. The three preprocessing ^¬ devices 70, 71 and 72 are connected to the three binary inputs 6a, 6b and 6c of the device 4 and are thus connected via the switches Sl, S2 and S3 to the control circuit voltage Usk. In addition, it can be seen in FIG. 1 that the three preprocessing devices 70, 71 and 72 are connected to the control device 10 of the device 4 via binary lines.

2 shows a first embodiment of the Bi ^¬ näreingangsmodul 13 according to Figure 1 is shown in further detail. It can be seen that the control circuit voltage Usk is applied to the reference voltage circuit 50 of the binary input module 13. The reference voltage circuit 50 comprises a diode 51, a capacitor 52 and a voltage divider 53, which forms a partial connection 54. At the divider terminal 54 drops the internal reference voltage Ui, which is proportional to the control circuit voltage Usk (neglecting the voltage drop across the diode 51). The voltage divider 53 is formed by two ohmic resistors Rl and R2.

The reference voltage circuit 50 is followed by a

Switching element SE, which is formed by a bipolar pnp transistor. The switching element SE is connected with its base terminal to the divider terminal 54 of the voltage divider 53 of the reference voltage circuit 50.

In FIG. 2 it can be seen that a series resistor Rv is connected to the emitter connection of the switching element SE, which is ^supplied with the control circuit voltage Usk and forms a current limit for the emitter collector path of the switching element SE. To the emitter terminal of the switching element SE, the three preprocessing devices 70, 71 and 72 are connected, which may for example be of identical design. Therefore Nachfol ^¬ quietly only the left in the Figure 2 pre-processor 70 will be described in detail. The two other preprocessing devices 71 and 72 are identical. It can be seen in Figure 2 that the preprocessing means 70 having an input port 70e, which is at the Bi ^¬ näreingang 6a of the device 4 and thus connected to the switch Sl. The input terminal 70e is connected to a diode 100 to which a constant current source 105 is connected. The constant current source 105 is connected via an optocoupler 110 to an output terminal 70 a of the preprocessing device 70. This output terminal 70a is connected to the emitter terminal of the switching element SE in connection.

In addition, it can be seen in FIG. 2 that the optocoupler 110 forms a signal output 70s of the preprocessing device 70, to which a binary line 701 is connected and which transmits a binary signal B70 to the control device 10 via this binary line 701.

The two other preprocessing devices 71 and 72 are - as already mentioned - designed identically. They also each have a diode 100, a constant current source 105 and an optocoupler 110. In addition, they are each connected to an input port 71e and 72e and an off ^¬ input terminal 71a or 72a provided, which is connected to the emitter terminal of the switching element SE ^¬.

The binary signals generated by the two preprocessing devices 71 and 72 are indicated in FIG. 2 by the reference symbols B71 and B72. These binary signals B71 and B72 reach the control device 10 via binary lines 711 and 721.

The operation of the Binäreingangsmoduls 13 will now be explained in ^¬ way of example with reference to the pre-processor 70 in further detail:

If the switch S1 is open, as shown in FIG. 2, no voltage is present at the input terminal 70e of the preprocessing ^device 70. In this case, no Current can flow through the optocoupler 110, so that the optocoupler 110 as a binary signal B70 will send a logical "0" via the binary line 701 to the controller 10.

If, however, the switch Sl is closed, the control circuit voltage Usk is applied to the input port 70e of the pre-processor 70, so that the switching element SE are turned on and the optical coupler as Binärsig ^¬ nal B70 is a logical "1" on the Binärleitung 701 to the controller 10 will send.

Switching through of the switching element SE is only considered when the emitter base line of the switching element SE is acted upon by a sufficiently high forward voltage. This is always the case when the applied voltage Ue about 0.7 V will be greater at the emitter of the switching elements SE ^¬ as the internal reference voltage Ui, which abuts the Teileran- circuit 54 of the voltage divider 53rd In other Wor ^¬ th there will be a current flow from the binary input 6a of the device 4 by the pre-processor 70 and to a turn on of the switching element SE only if the difference between the height of the 70e of the input terminal applied voltage signal and the level of the internal reference voltage Ui exceeds a predetermined minimum value which approximates as follows:

Umin = Ui + Ueb + U70, where Umin denotes the minimum value, Ui the internal reference voltage, Ueb the emitter base voltage of the switching element SE and U70 the voltage drop across the preprocessing device 70.

The binary input 13 thus processes an input side present at the Binäreingän ^¬ gen 6a, 6b and 6c input signal depending on the internal reference voltage Ui, which to an external operating voltage - here the Steuerkreisspan- Usk - is approximately proportional, with which in turn the input side applied input signal has been formed. This makes it possible to correctly handle the binary input 13, control circuit ^¬ voltages within a relatively large voltage interval: Thus, the binary input shown in the Figure 2 can 13 input signals, which have been formed with an external operating voltage between 20 V and 200 V, process properly. For example, if a large external operating voltage, the relevant for the formation of the binary signal B70 internal reference voltage Ui is ent ^¬ correspondingly high, whereas when using a small external operating voltage and a small control circuit voltage Usk the internal reference voltage Ui will be accordingly small. The internal reference voltage Ui used to form the binary signal B70 to B72 is the external operating voltage which is used to form the input side input signals always näherungswei ^¬ se proportional. The device according to FIG. 2 is "high active", which means that when a positive voltage is applied to the binary inputs 6a, 6b and 6c, a binary signal B70, B71 or B72 is always generated with a logic "1" becomes. FIG. 3 shows by way of example an exemplary embodiment of a binary input module 13 which is "low active". This means that when the switches S1, S2 and S3 are open, ie in the absence of current flow through the corresponding preprocessing device 70, 71 and 72, a binary signal B70, B71 or B72 will be generated with a logical "1". The structure according to FIG. 3 essentially corresponds to the design according to FIG. 2, the following changes in circuitry being made: (a) The external connection of the control circuit voltage Usk, but the negative connection of the control circuit voltage, is not the external operating voltage for the three switches S1, S2 and S3 Usk used. (b) The diodes 100 and the optocouplers 110 in the preprocessing devices 70, 71 and 72 are connected with inverse Verpo- ment.

(c) Instead of a pnp transistor, an npn transistor is used whose emitter terminal is connected via a series resistor Rv to the negative terminal of the control circuit voltage Usk.

Incidentally, in particular with regard to the Funktionswei se, the circuit according to Figure 3 corresponds to the circuit of Figure 2.

Reference sign list

4 device

6a-6c binary inputs

9 H bridge circuit

10 control device

11 control module

12 control module

13 binary input module

14 switching element

15 switching element

16 monitoring module

17 voltage transformers

18 voltage transformers

19 optocouplers

50 reference voltage circuit

51 diode

52 capacity

53 voltage divider

54 divider connection

60 switching element

70-72 Before development facility

70a-72a output connection

70e-72e input connector

701-721 binary line

70s signal output

100 diode

105 constant current source

110 optocouplers

A1-A5 connection

B70-B72 Binary signals

LK load circuit

M switch drive

Rl, R2 Ohmic resistors

Rv series resistor

SE switching element

SK control circuit S1-S3 switch

Ue tension

Ui reference voltage

Ulk load circuit voltage Usk control circuit voltage

Claims

claims

1. Device (4) for controlling a switch drive (M) ei ^¬ nes electrical switch with a control device (10) which is suitable, one at a binary input (6 a, 6 b, 6 c) of the device (4) entrant side, with a evaluate the external operating voltage (Usk) generated input signal and the control of the switch drive (M) in response to the input signal applied input side,

d a d u r c h e s e n c i n e s, d a s s

the device (4) has a reference voltage ^circuit (50) which is suitable for generating an internal reference voltage (Ui) with the external operating voltage (Usk), - the device has a pre-processing device (70, 71, 72) which is suitable for generating with the input signal present at the binary input (6a, 6b, 6c) a binary signal (B70, B71, B72) whose logic level depends on the magnitude of the input signal and the magnitude of the reference voltage (Ui), and

- The control device (10) of the device (4) directly or indirectly with the pre-processing means (70, 71, 72) is in communication and the binary signal (B70, B71, B72) of the pre-processing means (70, 71, 72) evaluates.

2. Apparatus according to claim 1,

d a d u r c h e s e n c i n e s, d a s s

- The device (4) has a switching element (SE), the current flow from the binary input (6a, 6b, 6c) through the

Preprocessing device (70, 71, 72) in response to the height of the input signal and the height of the reference ^¬ voltage (Ui) allows or prevents, and

the logic level of the binary signal (B70, B71, B72) from

Current flow through the preprocessing device (70, 71,

72).

3. Apparatus according to claim 2,

characterized in that the switching element (SE) allows a current flow from the binary input (6a, 6b, 6c) by the preprocessing means (70, 71, 72) when the difference between the height of the input ^¬ signal and the height of the reference voltage (Ui) a specified minimum value (Umin).

4. Device according to one of the preceding claims 2-3, characterized in that the pre-processing means (70, 71, 72) having an input terminal (70e, 71e, 72e) to the binary input (6a, 6b, 6c) and having an output terminal (70a, 71a, 72a) is connected to the switching element (SE).

5. Device according to one of the preceding claims, characterized in that the preprocessing device (70, 71, 72) has an optocoupler (110), the output side of the binary signal (B70, B71, B72) generates, wherein the logic level of the binary ^¬ signal ( B70, B71, B72) through the Vorverarbei ^¬ processing device (from the current flow 70, 71, 72) depends.

6. The device according to claim 1, wherein the reference voltage circuit (50) has a voltage divider (53).

7. Apparatus according to claim 6,

d a d u r c h e k e n e z e i n e s, that is, the voltage divider (53) has a divider terminal (54) to which the reference voltage (Ui) is applied, and

the divider terminal (54) and the output terminal (70a, 71a, 72a) of the pre-processing means (70, 71, 72) are connected to the switching element (SE).

8. Device according to one of the preceding claims 2-7, characterized in that the switching element (SE) is a transistor or has a Transis ^¬ gate.

9. Apparatus according to claim 8,

characterized in that the transistor is a bipolar transistor and the divider terminal (54) is connected to the base terminal of the transistor and the output terminal (70a, 71a, 72a) of the Vorverarbeitungsein ^¬ direction (70, 71, 72) to the emitter terminal.

10. A method for controlling a switch drive (M) of an electrical switch, wherein an input signal applied to a binary input (6a, 6b, 6c), with an external operating voltage (Usk) evaluated and the control of the switch drive (M) in Depending on the input signal applied to the input,

d a d u r c h e k e n e c i n e t, d a s s - with the external operating voltage (Usk) an internal reference voltage (Ui) is generated,

- With the input to the binary input (6a, 6b, 6c) input signal, a binary signal (B70, B71, B72) is generated, whose logic level of the height of the input signal and the height of the reference voltage (Ui) depends, and

- The binary signal (B70, B71, B72) is evaluated.