EP1437463B2 - Control system for a door opener actuated by direct-current - Google Patents

Abstract

A self-locking N-channel MOSFET (T1) in a source circuit has its source earthed for feeding a current to a door opener (TO) that fits between the MOSFET's drain connection and the door opener's positive voltage supply (UBT). A diode (D3) is coupled parallel to the door opener with its anode on the MOSFET's drain connection and its cathode on the door opener's positive voltage supply. Independent claims are also included for the following: (a) A power supply unit for a door opener operated by direct current; (b) and for a method for triggering a door opener operated by direct current.

Description

The invention relates to a control electronics for a DC operated door opener and a supply unit for a DC operated door opener.

document DE 3618645 discloses a drive electronics according to the preamble of claim 1.

In general, electrical door openers can be controlled with direct current or alternating current. When controlled with alternating current creates a buzzing sound, which is perceived as disturbing, especially if the controlled door for a long time, z. B. several hours, to be unlocked. When driving with direct current already causes a very low preload on the door opener trap that the door opener jammed and the door is not released. Even the preload caused by a door seal may be enough to jam the door opener, resulting in the door not being opened.

It is therefore the object underlying the invention to provide a control for a door opener, in which the disadvantages described above do not exist.

This object is achieved by a control electronics for a DC operated door opener according to claim 1. Advantageous developments can be found in these subordinate subclaims.

A control electronics for a DC operated door opener according to the invention has a lighting device that can pulse or pulse a voltage applied to the door opener DC voltage at least during a certain period of energization of the door opener.

Thus, according to the invention, the possible preload in door-openers operated with direct current is increased without a hum occurring in accordance with an alternating current current occurring.

According to the invention, the certain period of time is advantageously at the beginning of the energization.

Alternatively or additionally, the specific period of time according to the invention advantageously lasts approximately between 0.2 seconds and 10 seconds, preferably between about 0.2 seconds and 5 seconds, more preferably about 1.5 seconds.

In particular, a combination of these two advantageous embodiments of the invention has the advantage that the door opener opens safely even at an increased preload, after which the preload no longer needs to be considered and by the DC operation, a very quiet operation is achieved.

However, the pulsed current can according to the invention z. B. only then take place when the control electronics has detected a blocking of the door opener, whereby according to the invention a DC operation can be done without pulses, if this is sufficient to open the door.

But it is also possible that a pulsed operation always takes place, but not directly at the beginning of the energization, but only after a certain period of time has elapsed, in which a user would have already passed a door whose door opener is not jammed. In this way, the average user who does not exert too early bias on the door will not be bothered by the short humming noise that may be produced by pulsing the DC voltage since this occurs after the door has been passed. Furthermore, but also the hurried user who has exercised too early a bias on the door, a renewed request for opening the door is spared.

According to the invention, the pulsing of the DC voltage advantageously takes place at a frequency approximately between 10 Hz and 200 Hz, preferably approximately between 10 Hz and 100 Hz, more preferably approximately 50 Hz or 60 Hz. These frequencies ensure that the door opener actuated according to the invention does not jam and in particular the further preferred embodiment offers the advantage that a user does not hear him unfamiliar humming or whistling, but a sound corresponding to the usual power hum.

In accordance with claim 1, a supplied supply voltage for the door opener is pulsed during a certain period of time and otherwise forwarded unchanged to the door opener, in particular by the lighting device. In this advantageous embodiment of the invention, the control electronics according to the invention can be easily switched between a conventional power supply and a conventional door opener and is activated by the conventional control, after which the advantages of the invention without further Dazutun be achieved.

In an advantageous development of the invention, the lighting device is a transistor, preferably a MOSFET.

The control electronics has an oscillator which controls the lighting device during a certain period of time so that a pulsed supply voltage is applied to the door opener.

The oscillator comprises in a further advantageous embodiment of the invention connected as an oscillator Schmitt trigger.

The control electronics has a timer, which determines the beginning and the duration of the particular period of time.

In this case, the time control device comprises in a first further advantageous development of the invention, a first timer, which determines the beginning of the specific period of time after supplying a supply voltage for the door opener.

In this case, the first timer comprises in a still further advantageous embodiment of the invention, a Schmitt trigger, at the input of a switched against the supply voltage for the door opener capacitor and a resistor connected to ground are connected.

In this case, the time control device in a second further advantageous embodiment of the invention comprises a second timer, which determines the duration of the particular period of time.

In this case, the second timer in a still further advantageous embodiment of the invention comprises a Schmitt trigger, at the input of which a resistor connected to the supply voltage for the door opener and a capacitor connected to ground are connected.

In such an embodiment of all three previously mentioned modules with Schmitt triggers an advantageous series connection of the three modules is possible, as will be described in detail below. Furthermore, a very compact construction is possible. In a self-locking MOSFET as a lighting device Schmitt triggers are advantageously designed as inverting Schmitt trigger.

In yet another advantageous embodiment of the invention, the control electronics on a voltage regulator for supplying the control electronics from a supply voltage for the door opener. In this case, the control electronics according to the invention, the time constants of which generally result from the supply voltage applied thereto, can be used for door openers operating with very different voltages, without any need for changes or adjustments.

A supply unit according to the invention for a DC-operated door opener has a control electronics according to the invention.

The previously described embodiments and advantageous embodiments and embodiments of the invention can be combined with one another in any desired manner.

It is understood that the control electronics can also be connected directly to an existing supply voltage (DC voltage).

Further details, features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

Figur 1

ein Blockschaltbild einer Ansteuerung eines Türöffners;

Figur 2

eine Türöffneransteuerung und

Figur 3

den Verlauf einer an die in der Figur 1 gezeigten Türöffneransteuerung angelegten Eingangsspannung und der von dieser erzeugten Ausgangsspannung.

Show it:

FIG. 1

a block diagram of a control of a door opener;

FIG. 2

a door opener control and

FIG. 3

the course of an in the FIG. 1 shown door opener control applied input voltage and the output voltage generated by this.

In the FIG. 1 the basic activation of a door opener TÖ is shown. A power supply unit 1 supplies a door opener control with the necessary supply voltage via a connection 5. The connection 5 goes to a timer 2 whose output signals go via a connection 6 to an oscillator 3. The oscillator 3 controls via a connection 7 to an output stage 4, whose output signal is supplied via a connection 9 to the door opener TÖ. From the output stage 4, a feedback to the timer 2 is connected via a connection 8.

In the FIG. 2 is an embodiment of the principle circuit after FIG. 1 played. Fig. 2 is not within the scope of the claims.

One in the FIG. 2 shown door opener control has a self-locking N-channel MOSFET T ₁ in source circuit whose source is grounded, via which a door opener TÖ is energized, between the drain terminal of the MOSFET T ₁ and a positive supply voltage U _{BT of} the door opener TÖ lies. Parallel to the door opener TÖ a diode D _{3 is} connected, whose anode is connected to the drain terminal of the MOSFET T ₁ and whose cathode is connected to the positive supply voltage U _{BT of} the door opener TÖ.

The gate of the MOSFET T ₁ is driven via a parallel circuit of a resistor R ₅ and a capacitor C ₄ from the output of an oscillator, which consists of an inverting Schmitt trigger S ₃ , connected between the input and ground of a capacitor C ₃ and between the Input and output, a resistor R _{4 is} connected, wherein the output of the third inverting Schmitt trigger S _{3 is} simultaneously the output of the oscillator.

In this configuration, upon application of a supply voltage to the inverting Schmitt trigger S _3, the oscillator oscillates with a frequency determined by the resistor R ₄ and the capacitor C ₃ and the hysteresis and threshold voltages of the inverting Schmitt trigger S ₃ , thereby controlling the MOSFET T ₁ so that this energizes the door opener TÖ pulsed when a positive supply voltage U _{BT of} the door opener is applied.

The input of the inverting Schmitt trigger S ₃ is connected via a diode D ₂ , the anode of which is connected to the input of the inverting Schmitt trigger S ₃ , to a second timer whose output is the output of an inverting Schmitt trigger S ₂ . between the input and ground, a capacitor C _{2 is} connected, due to the higher storage capacity, preferably an electrolytic capacitor, and between the input and the supply voltage U _{BA of} the control electronics, a resistor R _{3 is} connected. The second timer determines the duration of the pulsed energization of the door opener TÖ, as the output of the inverting Schmitt trigger S ₂ pulls the input of the inverting Schmitt trigger S ₃ to ground when the capacitor C ₂ via the resistor R ₃ on the threshold turn-on voltage of the inverted Schmitt trigger S _{2 is} charged.

In this configuration, the duration of the pulsed current through the resistor R ₃ and the capacitor C ₂ and the threshold voltages of the inverting Schmitt trigger S _{2 is} determined.

The input of the inverting Schmitt trigger S ₂ is connected via a series connection of a diode D ₁ and a resistor R ₂ , whose anode is connected to the input of the inverting Schmitt trigger S ₂ , to a first timer whose output is the output of a first inverting Schmitt trigger S ₁ , between whose input and ground, a resistor R _{1 is} connected and between the input and the supply voltage U _{BA of} the control electronics, a capacitor C _{1 is} connected. The first timer determines the beginning of the pulsed energization of the door opener TÖ, as the output of the inverting Schmitt trigger S ₁ pulls the input of the inverting Schmitt trigger S ₂ to ground and thus keeps the capacitor C ₂ discharged or discharged until the capacitor is charged C ₁ via the resistor R ₁ so far that the voltage drop across the resistor R ₁ voltage drops below the Schwellenausschaltspannung of the inverting Schmitt trigger S has dropped. ₁

In this configuration, the beginning of the pulsed current through the resistor R ₁ and the capacitor C ₁ and the threshold voltages of the inverting Schmitt trigger S _{1 is} determined.

In a preferred embodiment, the first timer is set so that the capacitor C _{2 of} the second timer discharged as quickly as possible and then released for charging via the resistor R ₃ , whereby a pulsed operation of the door opener TÖ at the beginning of the operation of the door opener TÖ a subsequent continuous power takes place.

The supply voltage U _{BA of} the control electronics is z. B. generated by a voltage regulator consisting of a connected between the supply voltage U _{BT of} the door opener TÖ and ground series connection of a resistor R ₆ and a Zener diode ZD ₁ , wherein the anode of the Zener diode ZD1 is grounded, an NPN transistor T ₂ , the Collector is connected to the supply voltage U _{BT of} the door opener TÖ and whose base is located at the connection point of the resistor R ₆ and the Zener diode ZD ₁ , and a resistor R ₇ , which is connected between the emitter of the NPN transistor T ₂ and ground. The supply voltage U _{BA of} the control electronics in this case is applied to the emitter of the NPN transistor T ₂ . The voltage regulator can be considered as belonging to the control electronics.

Thus, if the supply voltage U _{BT of} the door opener TÖ to the control electronics according to the invention, it is automatically the energization of the door opener TÖ invention via the switching transistor, here the MOSFET T ₁ .

The FIG. 3 shows in the upper part an exemplary course of an input voltage of the control electronics, here the supply voltage U _{BT of} the door opener TÖ, and in the lower part the course of the corresponding output voltage of the control electronics, ie the voltage actually applied to the door opener TÖ, with a pulsed operation at the beginning.

The control electronics according to the invention is kept small by the space requirement and can be combined with a power supply. Advantageously, the input and output voltage is applied by attachable terminals to a control electronics containing board, which are preferably designed reverse polarity. Due to the required power, wires with a diameter of up to 0.8 mm should be connectable. The circuit is further preferably secured against reverse polarity and interchanging the input and output voltage.

LIST OF REFERENCE NUMBERS

1

power adapter

2

timer

3

oscillator

4

final stage

5

connection

6

connection

7

connection

8th

connection

9

connection

C ₁

capacitor

C ₂

capacitor

C ₃

capacitor

C ₄

capacitor

R ₁

resistance

R ₂

resistance

R ₃

resistance

R ₄

resistance

R ₅

resistance

R ₆

resistance

R ₇

resistance

D ₁

diode

D ₂

diode

D ₃

diode

ZD ₁

Zener diode

S ₁

inverting Schmitt trigger

S ₂

inverting Schmitt trigger

S ₃

inverting Schmitt trigger

T ₁

MOSFET

T ₂

NPN transistor

U _BA

Supply voltage of the control electronics

_BT

Supply voltage of the door opener

TÖ

Door Opener

Claims (12)

1. An electronic control system for a door opener (TO), operated by direct current, including an energizing device, which, during operation, at least for a predetermined period of time, when the door opener (TO) is energized, pulses a direct voltage (U_BT) applied to the door opener (TO), characterized

   - in that a power supply unit (1) energizes a timing element (2) via a connection (5), which timing element determines the start and the duration of the determined period of time, and the output signal thereof is transferred to an oscillator (3) via a connection (6),

   - in that the oscillator (3) controls an output stage (4) via a connection (7),

   - in that an output signal of the output stage (4) is transferred to the door opener (TO) via a connection (9), and

   - in that a connection (8) connects the output stage (4) to the timing element (2), and thus switches a feed back,

   - wherein the energizing device pulses the direct voltage (U_BT) supplied to the door opener (TO) during the predetermined period of time, and otherwise transmits the voltage unchanged to the door opener (TO).
2. The electronic control system according to claim 1, characterized in that the predetermined period of time is at the beginning of energizing.
3. The electronic control system according to claim 1 or 2, characterized in that the predetermined period of time is variable and/or adjustable, and lasts approximately between 0.2 seconds and 10 seconds, approximately between 0.2 seconds and 5 seconds, or approximately 1.5 seconds.
4. The electronic control system according to any of the claims 1 to 3, characterized in that the direct voltage (U_BT) is pulsed at a frequency between 10 Hertz and 200 Hertz, between 10 Hertz and 100 Hertz, or at 50 Hertz or 60 Hertz.
5. The electronic control system according to any of the claims 1 to 4, characterized in that the energizing device consists of a transistor or a MOSFET (T₁).
6. The electronic control system according to any of the claims 1 to 5, characterized in that the oscillator (3) comprises a Schmitt trigger (S₃), which is switched as an oscillator.
7. The electronic control system according to any of the claims 1 to 6, characterized in that the timing element (2) comprises a first timing element, which determines the beginning of the predetermined period of time after a supply voltage is supplied to the door opener (TO).
8. The electronic control system according to claim 7, characterized in that the first timing element comprises a Schmitt trigger (S₁), which has its input connected to a capacitor (C₁), which is coupled to a supply voltage (U_BA) for the electronic control system, and to a resistor (R₁), which is coupled to ground.
9. The electronic control system according to any of the claims 1 to 8, characterized in that the timing element (2) comprises a second timing element, which determines the duration of the predetermined period of time.
10. The electronic control system according to claim 9, characterized in that the second timing element comprises a Schmitt trigger (S₂), which has its input connected to a resistor (R₃), which is coupled to a supply voltage (U_BA) for the electronic control system, and to a capacitor (C₂), which is coupled to ground.
11. The electronic control system according to any of the claims 1 to 10, characterized by a voltage regulator (1) for supplying energy from the direct voltage (U_BT) to the electronic control system for the door opener (TO).
12. A supply unit for a door opener (TO), operated by direct current, characterized by an electronic control system according to any of the preceding claims.

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