EP3330477B1 - Carousel door arrangement and method for positioning a turnstile of a carousel door arrangement - Google Patents

Description

The present invention relates to a revolving door arrangement and a method for positioning a turnstile of a revolving door arrangement. In particular, the present invention relates to an exact positioning of the turnstile by means of an electric drive to a predefined rotational position.

Revolving door arrangements are known which have an asynchronous motor with a downstream transmission. A multi-stage gear (e.g. worm gear, toothed belt stages) is typically used here. To drive the turnstile of the revolving door arrangement, a multi-tooth shaft is used, which is firmly connected to the drive unit. This drive system is first built into the ceiling structure. Then the turnstile including the door wing is installed. So far, external frequency converters have been used for revolving door drives. Here, a certain number of predefined rotational speeds could be set. However, it was not possible to set rotational speeds between two fixed rotational speeds. Since this only allowed a limited number of fixed turning speeds for the door control and in particular for the positioning of the specified turnstile, high-precision control and positioning of the turnstile was very difficult.

EP 3 034 759 A1 relates to a method for controlling a revolving door, in which the motor is arranged coaxially with the turnstile.

EP 3 034 759 A1 discloses all features of the preamble of claims 1 and 7.

US 5,647,173 discloses an operating method for a revolving door in which a user pressing on the door leaf is assisted in operating the revolving door by a support force which is generated by means of an electric motor.

US 5,647,173 discloses all features of the preamble of claims 1 and 7.

In the revolving door known in the prior art, five different signals can be used to control the drive. Thus the controller can control the motor with three

Let speeds go and brake additionally. The fifth signal can be used to reverse the direction of rotation (e.g. by reconnecting the connecting cables). A freewheel can e.g. can be achieved by releasing a clutch. A disadvantage of the known designs is that the mechanical play between the drive and the turnstile usually prevents an exact positioning of the turnstile.

It is an object of the present invention to provide a method and a revolving door arrangement which meet the needs identified above.

The problem is solved by the features of the independent claims. The dependent claims have advantageous refinements of the invention.

Accordingly, the object is achieved by a method for positioning a turnstile of a revolving door arrangement. The turnstile comprises at least two, preferably three, four, five or more door leaves and can be rotated about an axis of rotation, an axial direction being defined along the axis of rotation and a radial direction perpendicular to the axial direction. The revolving door arrangement comprises an electric drive, which is designed, for example, as an electronically commutated multi-pole motor with a stator comprising a stator laminated core and several coils and a rotor comprising a rotor laminated core and several permanent magnets. The rotor can be arranged coaxially to the axis of rotation and connected to the turnstile for direct, gearless drive. An evaluation unit is set up to carry out logical steps for the operation of the revolving door arrangement. The evaluation unit can be understood as an electronic control unit. You can programmable processor, a microcontroller or similar exhibit. The method comprises at least the following steps: First, a target holding position of the door leaf is determined. Normally, target holding positions for the door leaf, for example, are always selected such that a maximum number of door leaves has in contact with the posts of a drum surrounding the revolving door arrangement. In this way, maximum noise and heat insulation values are achieved. Since these positions are defined recurring, it is sufficient to define one of the strictly different rotational positions as the target stop position. The stator of the drive is then controlled with a first electrical signal, by means of which the rotor / door leaf comes to a standstill at the desired stop position. For this purpose, a voltage and / or a current and / or an amplitude and / or a frequency and / or a pulse-pause ratio (in the case of a pulse-width-modulated signal (PWM signal) can be regulated. This process can be carried out as a rough positioning of the door leaf or The deviation of the current position of the door leaf from the target stop position is then determined. In other words, it is determined that the rotational position of the turnstile does not sufficiently match the target stop position. This can be determined, for example, using a position sensor. The stator is then actuated with a second electrical signal, by means of which the door leaf arrives in the desired stop position. In particular, a direction of rotation of the turnstile can be reversed. In other words, the rough positioning (eg from full speed) takes place in a first direction of rotation while after determining the dev Verification of the current position of the turnstile from the target stop position, the direction of rotation of the turnstile is reversed. The second electrical signal can also be predefined with regard to a voltage, a current, an amplitude and a frequency.

For example, for the second electrical signal there is the possibility of generating suitable forces on the rotor of the electrical drive via a pulse-pause ratio of a PWM signal in order to bring the rotor or the door leaf back into the desired holding position. Optionally, a continuous readjustment can be started here, which ensures that the target stop position is best mapped by the real door leaf arrangement.

The second electrical signal can preferably have a (in particular essentially linear) dependency on a deviation of the position of the door leaf from the target holding position. The dependency can also have a progressive dependency of the second electrical signal on the deviation between the target and actual position of the door leaf. As a result, the target stop position can be reached more quickly.

For example, a PI controller can be used for fine positioning of the door leaf. In other words, according to a proportional part of the controller, a double angle between the target and the actual stop position leads to a torque that is twice as great on the drive of the rotor. For this purpose, for example, a double current can be passed through the stator of the drive, a voltage twice as high applied to its connections or the like. become. The I component (integrating controller, I element) acts on the manipulated variable by integrating the deviation between the setpoint and the actual stop position over time (with the weighting by the reset time).

As a position sensor for determining the rotor position or the turnstile position, a magnet arranged on the rotor can be used as a transmitter in connection with a slave arranged on the stator will. For example, a Hall sensor can be arranged on the stator. This does not rule out that several Hall sensors or position sensors are distributed over the circumference of the stator. The same applies to the encoder (e.g. a permanent magnet) on the circumference of the rotor. This additional magnet on the rotor is used to identify the absolute position, since the actual position system is a relative one. Depending on the position of the rotor, one parameter or several parameters of the first and / or the second electrical signal can be selected.

If it is determined that the target position was exceeded by the door leaf when the first electrical signal was applied or that the door leaf exceeded the target position by an external force (e.g. wind, a user or the like), the response may be the knowledge of the above a parameter of the first electrical signal for generating the second electrical signal can be reversed. With a suitable choice of the parameter, this also reverses the direction of rotation of the rotor and brings the turnstile back into the desired position.

If the force acting on the door leaf exceeds a predefined force and / or the current door leaf position deviates from the previous target stop position by a predefined angular range (e.g. the same target stop position has exceeded a predefined angular range), in response to the above Insight described a position of the turnstile closest to the target stop position with corresponding door leaf position can be defined as the new target stop position. In other words, if the door is rotated continuously at the previous desired stop position, it will come to a standstill at the previous desired stop position brought, whereby the previously considered door leaf is arranged at a target position closest to the angular range between two adjacent door leaves. In this way, it can be avoided, on the one hand, that a violent (improper) rotation of the turnstile leads to an overload of the drive and, on the other hand, there are the shortest possible routes to a predefined target stop position of the turnstile.

If the user request or an operating state predefines the need to permanently arrange the turnstile at the target stop position, a trigger signal can be generated and determined in response to which an absolutely closest (recurring defined) predefined door leaf position is defined as the target stop position. In particular, from a standing position, a rotation of the turnstile in a previous direction of rotation or counter to the previous direction of rotation can bring about the arrangement in the desired stop position. Alternatively, a predefined door leaf position that is closest (in a previously defined direction of rotation) can be defined as the target stop position. In particular, this can be advantageous from an operating state (a rotation) of the revolving door arrangement in order to avoid a reversal of the direction of movement with a correspondingly required energy requirement and to avoid confusion on the part of the user due to the reversal of the direction of rotation.

The positioning made possible according to the invention in the direction of rotation or counter to the direction of rotation enables the turnstile to be positioned particularly quickly in the desired holding position. In particular, the ability to approach an absolutely closest predefined door leaf position from a standing position as the target stop position shortens the required distances and avoids unnecessary ones Wear and energy consumption. In addition, unwanted influences on the current door leaf position or turnstile position by wind, animals and users can be reacted to quickly and reliably.

While three fixed frequencies (speeds) are usually possible for the turnstile in the prior art, intermediate stages or continuous drive torques and speeds are possible within the scope of the present invention (in particular by using pulse-width-modulated electrical signals to control the drive). For this purpose, the position sensor system proposed according to the invention (e.g. using Hall sensors arranged in the stator of the drive in connection with the magnetic field of the rotor) is also advantageous.

Within the scope of the present invention, internal frequency converters can be used, which can be freely parameterized. As a result, the speed of rotation and the torques are freely and variably adjustable. This results in high positioning accuracy - in conjunction with the Hall sensor sensor system. In the revolving door arrangement according to the invention, the positioning can be divided into two phases. The first phase consists of moving to the target position. The second phase consists of fixing the target position. Regulation takes place during the first phase from movement (rotation), during the second phase from standstill. In particular, a reaction to a control deviation can be reacted to in the second phase and the turnstile can also be moved against the previous direction of rotation.

According to a second aspect of the present invention, a revolving door arrangement with a turnstile with at least two door leaves, an evaluation unit and an electric drive is included proposed a stator and a rotor. The evaluation unit can be used as an electronic control unit, microcontroller, programmable processor or the like. be designed. The hardware of the revolving door arrangement can be designed in accordance with the above statements. The evaluation unit is set up to determine a target stop position of the door leaf. In addition, it can control the stator with a first electrical signal, by means of which the door leaf comes to a standstill at the desired stop position. The evaluation unit is also set up to determine a deviation of the current position of the door leaf from the target holding position and then to control the stator with a second electrical signal, by means of which the door leaf returns to the target holding position. In other words, the revolving door arrangement according to the invention is set up to carry out a method as described in detail above in connection with the first-mentioned aspect of the invention. The features, combinations of features and the advantages resulting from these correspond so clearly to those of the method according to the invention that reference is made to the above statements in order to avoid repetitions.

The stator of the electric drive can be provided for fixed assembly. In particular, it can be set up to be fastened to a ceiling (for example a suspended ceiling and / or a concrete ceiling). The stator can be arranged on the axis of the door cross such that, together with the rotor, it forms an air gap arranged coaxially to the axis of the turnstile. In other words, no gear is preferably provided between the drive and the turnstile. The result is a play-free kinematic relationship between the drive and the turnstile.

The revolving door arrangement can furthermore have a frequency converter, which preferably also has the evaluation unit and an output stage for controlling the electric drive. The evaluation unit is set up to implement a parameter of an electrical signal for controlling the electrical drive by means of pulse width modulation. The frequency converter is set up to control the output stage with a multi-phase representation of the electrical signal as a function of the pulse-width-modulated signal. In other words, a power signal can be generated by means of the output stage, which enables the drive to be energized as a function of an output signal from the evaluation unit. The components required for operating the revolving door arrangement according to the invention can thus be matched to one another in the best possible way. They can preferably be arranged in a common housing. The housing can include the frequency converter, the output stage and the evaluation unit. The housing can have a (in particular common) connection for an operating voltage of the aforementioned components. In particular, the drive can also be supplied with electrical energy via the operating voltage.

The evaluation unit can be set up to determine a current speed, a current position and / or a current speed of the turnstile on the basis of a position sensor in the electric drive. The position sensor can have at least one, preferably two, in particular three or more Hall sensors. The position sensor system can also have an encoder on the rotor of the drive. It can also have a magnetic mode of operation (for example a permanent magnet in conjunction with a Hall sensor), which is provided for determining the absolute position of the turnstile. The Hall sensors can in particular in the stator of Electric drive can be arranged and set up to generate a signal as a function of a magnetic alternating field generated by means of permanent magnets of the rotor, by means of which the position, the speed and / or the current speed of the rotor (and thus of the turnstile) can be determined. The electric drive can be designed as a brushless motor. The result is a highly efficient electrical drive and an exact positioning of the rotor by means of the method according to the invention.

Fig. 1

ein Ausführungsbeispiel einer Karusselltüranordnung gemäß der vorliegenden Erfindung;

Fig. 2

die Schnittdarstellung durch einen Teil des Ausführungsbeispiels der Karusselltüranordnung;

Fig. 3

eine perspektivische Darstellung des Ausführungsbeispiels der Karusselltüranordnung in einer Explosionsdarstellung;

Fig. 4

ein Flussdiagramm veranschaulichend Schritte eines Ausführungsbeispiels eines erfindungsgemäßen Verfahrens; und

Fig. 5

ein Blockschaltbild eines Ausführungsbeispiels einer erfindungsgemäßen Karusselltüranordnung.

The invention is explained in detail below with reference to the accompanying drawings. Show:

Fig. 1

an embodiment of a revolving door arrangement according to the present invention;

Fig. 2

the sectional view through part of the embodiment of the revolving door arrangement;

Fig. 3

a perspective view of the embodiment of the revolving door arrangement in an exploded view;

Fig. 4

a flow chart illustrating steps of an embodiment of a method according to the invention; and

Fig. 5

a block diagram of an embodiment of a revolving door arrangement according to the invention.

Fig. 1 shows an isometric view of a revolving door arrangement 1. The revolving door arrangement 1 comprises a turnstile 2. This turnstile 2 has four door leaves 3. The door leaves 3 are each angled at 90 ° to one another. The turnstile 2 is arranged rotatably about an axis of rotation 4. The axis of rotation 4 extends in the axial direction 5. A radial direction 6 is defined perpendicular to the axial direction 5. A circumferential direction 7 is defined around the axial direction 5.

A drive 8 is arranged on the turnstile 2. This drive 8 is designed as an electronically commutated multi-pole motor. The rotor 17 (s. Fig. 2 ) This drive 8 is connected coaxially to the axis of rotation 4 with the turnstile 2. As a result, the drive 8 enables a direct and gearless drive of the turnstile 2.

Fig. 2 shows a section through the revolving door arrangement 1. Of the revolving door arrangement 1, only the drive 8 is shown.

The drive 8 comprises a stator 10 and the rotor 17 Fig. 1 shows, the drive 8 is arranged above the turnstile 2. The rotor 17 is located between the turnstile 2 and the stator 10.

Fig. 2 shows a non-rotatably connected to the rotor 17 connecting element, designed as a multi-tooth shaft. The turnstile 2 is connected to the rotor 17 in a rotationally fixed manner via this connecting element.

The stator 10 comprises a stator disk 12. A stator laminated core 11 is arranged on the outer circumference of the stator disk 12. The individual coils 13 of the stator 10 are placed on this stator laminated core 11.

Each coil comprises a coil body 14, for example made of plastic. The windings 15 of the individual coil 13 are located on this coil former 14.

The rotor 17 comprises a rotor disk 43. This rotor disk 43 lies opposite the stator disk 12. The stator laminated core 11 with the coils 13 is arranged between the two disks 43, 12. A rotor laminated core 18 is arranged on the outer circumference of the rotor disk 43. A plurality of permanent magnets 19 are arranged radially within the rotor lamination stack 18 on the rotor lamination stack 18.

In the area of the axis of rotation 4, an axial bearing 20 and a radial bearing 21 are formed between the stator disc 12 and the rotor disc 43. In the exemplary embodiment shown, the axial bearing 20 and the radial bearing 21 are designed as slide bearings.

In Fig. 2 Furthermore, an embodiment of a frequency converter 25 is shown, which has a connection 27 for an operating voltage. An evaluation unit 9, a motor IC 36 (integrated circuit for drive control) and an output stage 26 for controlling the drive 8 are provided within the frequency converter 25. The evaluation unit 9, the motor IC 36 and the output stage 26 are in connection with Fig. 5 discussed in more detail. An input module 35 is arranged on the outside of the frequency converter 25, by means of which different inputs can be received by a user and feedback can be output to the user. For example, the target stop positions and maximum force effects, which are to be compensated according to the invention without redefining the target stop position by means of the drive, can be defined. This can depend, for example, on the currently used one Hardware. A weakly dimensioned electric drive is therefore not overloaded, while the possibilities of a stronger electric drive can be better exploited.

The in Fig. 1 The drive 8 shown is part of the revolving door arrangement 1. This revolving door arrangement 1 is in section in FIG Fig. 2 shown. In addition to the drive 8, the revolving door arrangement 1 includes an adapter unit 101. This adapter unit 101 is used for mounting the drive 8 on a superordinate ceiling structure 103. In the example shown, the ceiling structure 103 comprises two parallel horizontal beams.

The adapter unit 101 comprises at least one ceiling fastening element 102. This is designed here as a right-angled angle. The ceiling fastening element 102 is fastened in the profiles of the ceiling structure 103 via a screw connection and corresponding slot nuts.

The adapter unit 101 further comprises an adapter plate 107. The ceiling fastening element 102 is firmly connected, for example welded, to this adapter plate 107.

A plurality of fixing elements 104 of the adapter unit 101 are fastened to the circumference of the adapter plate 107. These fixing elements 104 each serve to fasten a suspended ceiling element 105.

The adapter unit 101 further comprises at least one drive fastening element 106. This is designed here as a screw connection and serves to fasten the drive 8 to the adapter unit 101, in particular to the adapter plate 107.

Fig. 2 and 3rd show preferred pre-fixing units 110. These pre-fixing units 110 here comprise a snap hook. This makes it possible to lift the drive 8 from below onto the adapter plate 107. The pre-fixing units 110 snap into place and the drive 8 is pre-fixed to the adapter unit 110. The drive fastening elements 106, which are designed as screw connections, can then be placed.

The illustration also shows in Fig. 3 a preferred connection recess 111 in the adapter plate 107. Via this connection recess 111, an electrical contact, in particular one or two plugs, is accessible from above within the drive 8.

The drive 8 has position sensors 28 in the form of Hall sensors which are arranged on the circumference of the stator. The position sensors 28 are set up to identify position sensors (not shown) on the rotor (not shown) and to report a rotational position of the drive 8 to the evaluation unit (not shown).

In the arrangement of the turnstile 2 shown, the front door leaf 3 is arranged at a current position 37. The current position 37 deviates less from a target position 38 than from a new target position 38 'which is rotated by 90 ° in the mathematically positive circumferential direction 7 with respect to the target position. If the current position 37 arises in the course of a turnstile 2 rotating at the nominal speed, it may make more energy and time sense to move to the new desired position 38 'instead of first stopping the turnstile 2 electrically and then contrary to the previous direction of rotation in the desired - Bring stop position 38. However, it is assumed that the turnstile 2 in the position shown stands still, it can be seen that starting against the previous direction of rotation to reach the target stop position 38 requires less energy and time than driving to the new target stop position 38 '. A corresponding case distinction can be made according to the invention in the evaluation unit of a revolving door arrangement according to the invention, in order to carry out a procedure for arranging the turnstile in a predefined target stop position or new target stop position which is favorable in terms of time, energy and wear.

Fig. 4 shows a flow diagram illustrating steps of an embodiment of a method according to the invention for positioning a turnstile of a revolving door arrangement. In step S100, a target stop position of the door leaf is determined, for example, a carrier signal can be received and evaluated during operation, which represents a user request or an operational necessity to stop the turnstile. In step S200, the stator of the electric drive of the revolving door arrangement according to the invention is controlled with a first electrical signal, by means of which the door leaf comes to a standstill at the desired stop position. In step S300, a deviation of the current position of the door leaf from the target stop position (in particular after the turnstile has stopped) is determined. In order to move exactly to the target stop position, the stator is then actuated with a second electrical signal in step S400, by means of which the door leaf returns to the target stop position. Here, the direction of rotation of the turnstile can be reversed compared to a previous direction of rotation. In step S500, a force subsequently acting on the door leaf is determined which exceeds a predefined force. In addition, in step S600, a deviation from a current one The position of the door leaf from the set stop position is determined by a predefined angular range and, in response to this, in step S700 a position of the turnstile closest to the set stop position with the corresponding door leaf position is defined as the new set stop position. Then, in accordance with step S400, the stator can be controlled with a second or a third electrical signal, by means of which the door leaf arrives in the new target holding position. In particular, the predefined electrical signal can be designed as a pulse-width-modulated signal.

Fig. 5 shows a block diagram of an embodiment of a revolving door arrangement according to the invention. An operating voltage of 24 V is connected to the electrical system via a connection 27. A DC / DC converter 41 feeds a microcontroller as an evaluation unit 9 with a voltage of 5V or optionally 3.3V. In addition, the operating voltage is applied via a diode 42 to a motor IC 36 and an output stage 26 for energizing the stator 10. The motor voltage can be in a predefined range, for example. The microcontroller can have further input variables (not shown). E.g. the Hall sensors can be connected to the microcontroller to determine a rotational position of the drive. The microcontroller supplies pulse-width-modulated signals for controlling the output stage to the motor IC 36. These also have a level of 5V or 3.3V. The pulse width modulated signals are used to control the three phases U, V, W of the stator 10 z. B. with 6 signals U_H, U_L, V_H, V_L, W_H, W_L (H - High, L - Low). In addition, a control line 39 and an error reporting line 40 are provided between the microcontroller and the motor IC 36. The motor IC 36 can be used to generate high / low signals with adapted voltage levels GH_U, GL_U, GH_V, GL_V, GH_W, GL_W Control of the MOSFETs of the output stage 26 are output. In addition, the motor IC 36 is used for short-circuit prevention for the control of the output stage 26. In other words, it is avoided that transistors of the output stage 26 arranged in a common bridge branch are simultaneously switched on and the output stage is thereby damaged. The control signals GH_U, GL_U, GH_V, GL_V, GH_W, GL_W are also designed as pulse width modulated signals. However, the respective high (H) signal essentially represents the respective level reversal of the low (L) signal for the phases U, V, W, with a dead time to avoid the abovementioned short circuit between the edges of the signals. The microcontroller, the motor IC 36 and the output stage 26 are shown as components of a frequency converter 25, the components of which can be arranged in a common housing. In particular, the components of the frequency converter 25 can be arranged on a common circuit board.

Reference list

1

Revolving door arrangement

2nd

Turnstile

3rd

Door leaf

4th

Axis of rotation

5

Axial direction

6

Radial direction

7

Circumferential direction

8th

drive

9

Evaluation unit

10th

stator

11

Stator laminated core

12th

Stator disc

13

Do the washing up

14

Bobbin

15

Winding

17th

rotor

18th

Rotor laminated core

19th

Permanent magnets

20th

Thrust bearing

21

Radial bearing

25th

frequency converter

26

Power amplifier

27

Connection for operating voltage

28

Position sensor

35

Parameter module

36

Motor IC

37

actual position

38

Target stop position

38 '

new target stop position

39

Control line

40

Error reporting

41

DC / DC converter

42

diode

43

Rotor disc

101

Adapter unit

102

Ceiling fastener

103

Ceiling construction

104

Fixation element

105

Suspended ceiling elements

106

Drive fasteners

107

Adapter plate

110

Pre-fuser

111

Connection recess

112

Cover plate

S100-S700

Procedural steps

Claims (13)

1. A method for positioning a turnstile (2) of a revolving door assembly (1), with

   - the turnstile (2),

   - an evaluation unit (9), and

   - an electrical drive (8), with

   - a stator (10) and

   - a rotor (17),

   wherein the rotor (17) can be disposed coaxially to an axis of rotation (4) of the turnstile (2) and can be connected to the turnstile (2) for direct gearless driving, and the method is characterized by the steps of:

   - determining (S100) a preset stop position of the door leaf (3),

   - controlling (S200) the stator (10) with a first electrical signal, by means of which the door leaf (3) comes to a standstill at the preset stop position (38),

   - determining (S300) a deviation of the current position (37) of the door leaf (3) from the preset stop position (38), and

   - controlling (S400) the stator (10) with a second electrical signal, by means of which the door leaf (3) returns back into the preset stop position (38).
2. The method according to claim 1, wherein the second electrical signal includes an in particular essentially linear dependency of a deviation of the position of the door leaf (3) from the preset stop position (38).
3. The method according to claim 1 or 2, furthermore comprising

   - utilizing a position sensor (28), in particular a Hall sensor disposed in the electrical drive (8), for determining the current position (37) of the rotor (17) and depending on the current position (37) of the rotor (17),

   - selecting a parameter of the first and/or the second electrical signals.
4. The method according to any of the preceding claims, furthermore comprising the steps of:

   - reversing a parameter of the first electrical signal for generating the second electrical signal.
5. The method according to claim 4, furthermore comprising

   - determining (S500) a force acting on the door leaf (3), which exceeds a pre-defined force, and/or

   - determining (S600) a deviation of the door leaf (3) from the preset stop position (38) by a pre-defined angle range and in response thereto

   - defining (S700) a position, nearest to the preset stop position (38), of the turnstile with corresponding leaf position as the new preset stop position (38').
6. The method according to any of the preceding claims, wherein determining the preset stop position (38) is realized depending on a trigger signal, in response thereto an absolute nearest predefined door leaf position is defined as the preset stop position (38), or

   - a nearest predefined door leaf position in a direction of rotation, until now the current one, is defined as the preset stop position (38).
7. The revolving door leaf assembly with

   - a turnstile (2),

   - an evaluation unit (9), and

   - an electrical drive (8), with

   - a stator (10) and

   - a rotor (17),

   wherein the rotor (17) can be disposed coaxially to an axis of rotation (4) of the turnstile (2) and can be connected to the turnstile (2) for direct gearless driving, wherein the evaluation unit (9) is adapted, characterized in that

   - to determine a preset stop position (38) of the door leaf (3),

   - to control the stator (10) with a first electrical signal, by means of which the door leaf (3) comes to a standstill at the preset stop position (38),

   - to determine a deviation of the current position (37) of the door leaf (3) from the preset stop position (38), and

   - to control the stator (10) with a second electrical signal, by means of which the door leaf (3) returns back into the preset stop position (38).
8. The revolving door assembly according to claim 7, which is adapted to perform a method according to any of the preceding claims 1 to 6.
9. The revolving door assembly according to any of the claims 7 or 8, wherein the stator (10) is adapted for stationary mounting, in particular for ceiling mounting, and with the rotor (17) forms an air gap, which is disposed coaxially to the axis of rotation (4) of the turnstile (2).
10. The revolving door assembly according to any of the claims 7 to 9, furthermore comprising

    - a frequency converter (25) comprising the evaluation unit (9) with

    - a final stage (26), wherein

    - the evaluation unit (9) is adapted

    - to realize a parameter of the first electrical signal and/or of the second electrical signal by a pulse width modulation, and

    - the frequency converter (25), depending on the pulse width modulated signal, is adapted

    - to control the final stage (26) with a multiphase representation of the first electrical signal, respectively of the second electrical signal.
11. The revolving door assembly according to claim 10, furthermore comprising

    - a connection (27) for an operating voltage, and

    - a housing, which comprises

    - the frequency converter (25),

    - the final stage (26), and

    - the evaluation unit (9),

    wherein in particular the connection for the operating voltage is adapted to supply electric energy to the evaluation unit (9), to the frequency converter (25) and to the final stage (26).
12. The revolving door assembly according to any of the claims 7 to 11, wherein, based on a position sensor (28), in particular Hall-sensors in the electrical drive (8), the evaluating unit (9) is adapted to determine

    - a current rotational speed and/or

    - a current position and/or

    - a current speed
    of the turnstile (2).
13. The revolving door assembly according to any of the claims 7 to 12, furthermore comprising

    - an input module (35), which includes a user interface, which is adapted for defining the second electrical signal.

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