Rotation angle detection system for detecting the rotation angle of a rotary brake drive unit for railway vehicles

Abstract

The present invention relates to a rotation angle detection system (1, 1') for detecting the rotation angle of a rotary brake drive for a railway vehicle, the rotation angle detection system (1, 1') comprising at least one sensor unit (30, 30') for detecting the rotation angle, which is functionally connectable to the rotary brake drive, and at least one electronic main path (10, 10') and at least one electronic safety path (20, 20') for each sensor unit (30, 30'), wherein the at least one electronic main path (10, 10') and the at least one electronic safety path (20, 20') are each functionally connectable to the at least one sensor unit (30, 30') as individual paths, and the at least one electronic main path (10, 10') and the at least one electronic safety path (20, 20') each have at least one signal processing unit (14, 15, 16, 18, 24, 25, 16, 28).

Description

[Technical Field]

[0001] The present invention relates to a rotation angle detection system for detecting the rotation angle of a rotary brake drive for a railway vehicle, a brake system for a railway vehicle, and a railway vehicle equipped with such a rotation angle detection system.

[0002] In railway vehicles, for example, electromechanical brake actuators, such as brake cylinders, are configured to convert electrical energy into mechanical energy using an electric motor. When the brake actuator or brake cylinder is activated, the rotor of the electric motor is set into rotational motion. This rotation or the drive torque associated with this rotation is transmitted via a shaft to a spindle nut located within or attached to the shaft. Axial locking of the spindle nut results in a feed motion of the spindle, an example of a converter, from rotational to linear motion. In another step, a mechanical transmission stage generates a caliper lever movement, which leads to the abutment of the brake pads on the brake disc and the generation of a pad contact force. To release the brake, the motor rotates in the opposite direction, thereby returning the screw drive.

[0003] To drive and control electric motors, such as permanent magnet excited synchronous machines, or PMSMs for short, rotation angle sensors are used to detect the rotor position. Therefore, to achieve high fault safety of the drive system, for example in the case of Safety Integrity Level 4 (SIL4), at least two sensor systems are often used, since this provides redundancy in the event of a sensor system failure.

[0004] However, due to the tight space conditions for corresponding implementation and also from a cost point of view, it is very difficult or even impossible to realize more than two sensors and components, which is especially true for brake actuator housings in rail vehicles, whose maximum dimensions are restricted due to the space conditions in the bogie.

[0005] In view of the above, it is therefore an object of the present invention to provide an improved rotation angle detection system compared to the prior art, particularly with regard to the required installation space.

[0006] This problem is solved by the subject matter of the independent claims.

[0007] Advantageous developments are the subject of the dependent claims.

[0008] According to the present invention, a rotation angle detection system for detecting the rotation angle of a rotary brake drive for a railway vehicle comprises at least one sensor unit for detecting the rotation angle, which is functionally connectable to the rotary brake drive, and at least one electronic main path and at least one electronic safety path for each sensor unit, each electronic main path and at least one electronic safety path being functionally connectable to the at least one sensor unit as an individual path, and each electronic main path and at least one electronic safety path having at least one signal processing unit.

[0009] The basic idea of ​​the present invention is therefore based on the fact that instead of two or more complete sensor paths, each of which has both a sensor unit itself and a signal processing unit, e.g. corresponding signal processing electronics, redundancy is achieved by using a sensor unit with two or more signal processing units, where each of the signal processing units is at least one associated with the electronic device main path and each of the signal processing units is at least one associated with the electronic device safety path.

[0010] The main electronics path and the safety electronics path are separate, individual paths that are connected in parallel to each other or essentially run separately. The main electronics path can be understood as the path that is functionally connected to the sensor unit in fault-free operation, and for this purpose can conduct the sensor signal or other signals, such as drive control signals or the like, unidirectionally or bidirectionally. Correspondingly, the safety electronics path can be functionally connected to the sensor unit only if a fault prevents or otherwise interrupts transmission via the main electronics path.

[0011] Alternatively, the main electronic path and the safety electronic path can be functionally connected to the sensor unit simultaneously, either permanently or at least temporarily, to enable a plausibility check of the transmitted signal or to transmit the signal without delay via the safety electronic path even in the event of a failure of the main electronic path. The functional connectability of the main electronic path and the safety electronic path relates to both a direct and an indirect connection of the individual paths for signal transmission. Furthermore, the functional connection can also relate to the actual activation of the individual paths or the respective signal processing units. In other words, at least one of the signal processing units can be, for example, constantly physically connected to the sensor unit, with the functional connection only being established precisely upon activation of the corresponding signal processing unit.

[0012] The functional connection possibilities of the sensor unit with the rotary brake drive may likewise include direct and indirect connections, which may be mechanical and / or signal-technical, so that the sensor unit, in interaction with the rotary brake drive, either by direct contact or via optical, acoustic and / or electrical or electromagnetic signals, can generate at least one signal representative of the rotation angle, which signal can be transferred via a main electronic path and / or a safety electronic path to a respective signal processing unit.

[0013] Forming a rotation angle detection system with sensor units having redundant individual paths can help reduce the required installation space, in particular because the respective signal processing units can be realized with small microelectronic and / or highly integrated components, which require relatively little space even when the individual paths are implemented redundantly. The redundant implementation of the individual paths, i.e., the electronic device safety path with respect to the electronic device main path, or the respective signal processing units, can relate to the performance of identical functions, but can also relate to the redundancy of predetermined functions, in particular safety-related functions.

[0014] According to one embodiment, the sensor unit is configured with a higher failure safety than at least one main electronic path and / or at least one safety electronic path, and the sensor unit has particularly low loss characteristics with respect to the higher failure safety.

[0015] Therefore, the sensor unit, e.g., the individual sensor elements, is implemented to be correspondingly simple, reliable, and fault-proof in order to achieve the highest possible failure safety. This can be achieved, for example, by appropriate measures, such as a durable mechanical design, reinforced insulation, a larger conductor cross-section, and / or the use of aging-resistant materials. The sensor unit is particularly configured so that its properties are "hard to lose" over a specified period of use or even over its entire lifespan. In this context, the term "hard to lose" refers to failures that cannot be foreseen. The signal processing unit or the individual paths connected thereto are implemented redundantly at least in predefined functionality, so that functions with relatively low failure safety can be transferred to these individual paths. Indeed, with regard to signal processing units with corresponding components that are often relatively complex and have a relatively high failure probability, this relatively high failure probability can be at least partially compensated for by redundancy.

[0016] According to one embodiment, the signal processing unit of the at least one electronic device main path and / or the at least one electronic device safety path comprises at least one signal converter.

[0017] Via at least one signal converter, for example, a sensor signal transmitted by a sensor unit can be converted into a signal that can be processed by another signal processing component, such as an A / D converter that converts the analog signal of the sensor unit into a digital format.

[0018] According to one embodiment, the signal processing unit of the at least one electronic device main path and / or the at least one electronic device safety path comprises at least one signal processing unit.

[0019] For example, the signal processing unit may further process the signal of the sensor unit, which may have been converted beforehand via a signal converter, and the further processing may be, inter alia, a calculation into other quantities taking into account other signal inputs and / or other forms of signal processing, so that the rotation angle of the rotary brake drive is determined based on the signal of the sensor unit.

[0020] According to one embodiment, the signal processing unit of at least one electronic device main path and / or at least one electronic device safety path comprises at least one signal output unit.

[0021] The signal output unit outputs the rotation angle of the rotary brake drive unit, which is determined based on the signal from the sensor unit. The signal output unit may be a separate unit of the signal processing unit, or may be incorporated into the signal processing unit. Conversely, the signal output unit may include a signal processing function.

[0022] According to one embodiment, at least one electronic device main path and / or at least one electronic device safety path has at least one signal switch, via which at least one signal processing unit is functionally connectable to at least one sensor unit.

[0023] Thus, at least one main electronic device path and / or at least one safety electronic device path can be selectively connected to and disconnected from the sensor unit via such a signal switch. If an error in at least one main electronic device path and / or at least one safety electronic device path could be transmitted to the sensor unit or otherwise adversely affect the sensor unit, this is prevented by disconnecting the individual path with the error. Furthermore, a deliberate connection to the sensor unit can also be established via the signal switch. In this way, for example, only one individual path can initially be connected to the sensor unit, and then, if this individual path fails or for another reason, another individual path can be switched on or switched to via the signal switch. The concept of switching on relates to the connection of two individual paths, while switching off disconnects the previous individual path.

[0024] According to one embodiment, the at least one electronic device main path and / or the at least one electronic device safety path comprises at least one energy supply unit, which is functionally connectable to at least one sensor unit.

[0025] Therefore, the sensor unit does not necessarily need a dedicated energy supply, but can be supplied with energy via at least one electronic device main path and / or at least one electronic device safety path. If the at least one electronic device main path and / or the at least one electronic device safety path has at least one energy supply unit or a connection with an energy supply unit, failure safety can be further improved.

[0026] According to one embodiment, at least one electronic device main path and / or at least one electronic device safety path has at least one energy supply switch, via which at least one energy supply unit is functionally connectable to at least one sensor unit.

[0027] Thus, here too, like a signal switch, the respective energy supply unit can be connected and disconnected in a targeted manner.

[0028] In particular, at least one electronic device main path and / or at least one electronic device safety path and / or at least one signal switch and / or at least one energy supply switch are drivable and controllable via drive control signals of the drive control unit.

[0029] Such a drive control unit preferably includes a monitoring function or is connected at least signal-technically to a corresponding monitoring unit, so that in the event of a failure or error in the individual paths, the signal processing unit, or the energy supply unit, at least one signal switch and / or at least one energy supply switch is controlled via the drive control signal. This control can be configured so that at least one main electronic path is controlled first, and if there is no response or if an error is detected in another way, at least one safety electronic path is controlled first. In this case, the drive control unit can also correspondingly control at least one signal switch and / or at least one energy supply switch. The control of the at least one signal switch and / or at least one energy supply switch can also be performed via the respective at least one main electronic path and / or at least one safety electronic path. The drive control unit can be part of the rotation angle detection system, for example, part of at least one main electronic path and / or at least one safety electronic path, or it can be an external drive control unit.

[0030] According to one embodiment, the sensor unit is a resolver or comprises at least one resolver.

[0031] A resolver is a rotation angle sensor that, like an electric motor, has a rotor and a stator. The resolver's rotor can be made of a material with good magnetic conductivity and can form a flux guide for the magnetic field generated by the stator. Observing the windings on the resolver's stator, two distinct regions can be distinguished. The first region corresponds to a rotary transformer, where the windings are arranged concentrically around the rotor. In the second region, the winding structure corresponds to that of a motor winding with two phases, but these phases are not connected to each other. The two winding regions are spatially separated from each other and are magnetically coupled only by the rotor and stator flux guides. The resolver's excitation winding is excited by a high-frequency voltage, typically sinusoidal or rectangular, typically in the range of 2 kHz to 10 kHz. The alternating magnetic field is transmitted exclusively by the rotor to the measurement winding, where its amplitude is modulated. The voltage at the measurement winding can be used as an evaluation quantity. Sinusoidal and cosine oscillations are then displayed as output signals. Since the rotor is excited by an alternating voltage of constant amplitude, this excitation induces a voltage in the measuring winding whose amplitude is independent of the number of revolutions of the brake drive shaft and therefore depends only on the rotor angle or rotor or shaft position.

[0032] Due to the resolver's construction, which does not use mechanical components with wear characteristics, such as ball bearings, and electronic components, such as microprocessors, semiconductors, or capacitors with solid electrolytes, the resolver itself provides extremely high failure safety.

[0033] The at least one main electronic path and / or the at least one safety electronic path in particular comprises at least one resolver-to-digital converter.

[0034] The use of at least one resolver-to-digital converter allows the resolver to be easily operated as a sensor unit. Since the resolver-to-digital converter is an electronic component similar to a microprocessor, which has a complex structure and / or is less fault-safe, at least one resolver-to-digital converter is provided in both at least one main electronic path and at least one safety electronic path.

[0035] According to one development, the at least one resolver digital converter is configured to magnetically excite the rotor of the resolver, in particular with a constant amplitude AC voltage, and to receive sine and cosine signals of the stator of the resolver.

[0036] Therefore, according to the aforementioned functioning of the resolver, a drive control signal or excitation signal for the resolver can be transmitted by the resolver-to-digital converter, and in turn, an output signal representative of the rotation angle can be received by the resolver. Correspondingly, at least one resolver-to-digital converter can be designed to generate a suitable excitation signal for the resolver. The at least one resolver-to-digital converter can further be designed not only to receive but also to further process the two output signals of the resolver, i.e., the sine and cosine signals, and to transmit the rotation angle of the rotary brake drive or the output signal representative of this rotation angle as a measurement quantity to a higher-level system, for example via a digital interface.

[0037] According to one embodiment, the at least one resolver digital converter or another signal processing unit is configured to determine the rotational angle position from the sine and cosine signals of the resolver stator, taking into account in particular the number of pole pairs of the resolver.

[0038] The resolver signals, i.e., the sine and cosine signals, can be evaluated, for example, via arctangent generation, to provide an electrical rotational angle position. By incorporating the resolver pole pair number, a mechanical rotational angle position can also be provided. Furthermore, the two output signals allow for resolver diagnostics and trigonometric calculations.

[0039] According to another aspect, the present invention relates to a braking system for a railway vehicle, the braking system comprising at least one brake actuator for applying a braking force, at least one rotary brake drive for operating the brake actuator, and at least one rotation angle detection system as described above.

[0040] The features mentioned in the above description of the rotation angle detection system are likewise relevant for advantageous developments of the braking system according to the invention, and vice versa.

[0041] According to another aspect, the present invention relates to a railway vehicle comprising at least one rotation angle detection system as described above and / or a braking system as described above, wherein at least one sensor unit is arranged on a bogie of the railway vehicle.

[0042] The features explained in the preceding description of the rotation angle detection system relate to equally advantageous developments of the railway vehicle according to the invention, and vice versa.

[0043] The embodiments of the invention described above and below should not be considered as limiting the subject matter of the invention, but rather, by supplementing, omitting or replacing individual features, other subject matter of the invention can be obtained.

[0044] In the following, advantageous embodiments of the invention will be explained with the aid of the accompanying drawings. [Brief explanation of the drawings]

[0045] [Figure 1] 1 is a schematic diagram of a rotation angle detection system for a railway vehicle according to a first exemplary embodiment; [Figure 2] FIG. 10 is a schematic diagram of a rotation angle detection system for a railway vehicle according to a second exemplary embodiment.

[0046] 1 shows a schematic diagram of a rotation angle detection system 1 for a rail vehicle according to a first exemplary embodiment. The rotation angle detection system 1 comprises a sensor unit 30 that can detect the rotation angle of a rotary brake drive (not shown) of the rail vehicle. For this purpose, the rotation angle detection system is arranged on the bogie, here for example being included in an electromechanical brake caliper that is arranged on the bogie of the rail vehicle. In an alternative embodiment, the rotation angle detection system 1 may also be arranged only partially in the brake caliper or on the bogie.

[0047] The rotation angle detection system 1 further includes an electronic main path 10 and an electronic safety path 20, each of which is connected to the sensor unit 30 as a separate path. The electronic main path 10 and the electronic safety path 20 each include a signal converter 14, 24, a signal processing unit 15, 25, and a signal output unit 16, 26 as part of a signal processing unit. The signal processing unit is formed from these components, and these components process the sensor signals of the sensor units. The electronic main path 10 and the electronic safety path 20 also include an energy supply unit 11, 21, respectively, for supplying energy to the sensor units. Connection of the sensor unit 30 for energy supply by the respective energy supply units 11, 21 is made via respective energy supply switches 12, 22. Similarly, connection of the sensor unit for signal processing via the respective signal converters 14, 24, the respective signal processing units 15, 25, and the respective signal output units 16, 26 is made via respective signal switches 13, 23. The signal switches 13, 23 and the energy supply switches 12, 22 are controlled by respective control signals 17, 27 provided by the control unit 40. The control signal 17 is used to control the signal switch 13 and the energy supply switch 12 of the main electronic path 10, whereas the control signal 27 controls the signal switch 23 and the energy supply switch 22 of the safety electronic path 20. If the rotation angle detection and the energy supply are carried out, for example, via the main electronic path, and an error or failure is detected during the implementation, the control unit 40 outputs the control signal 17, which opens the signal switch 13 and the energy supply switch 12 and thus disconnects them from the sensor unit 30. The control unit 40 also outputs the control signal 27 to the safety electronic path 20, which closes the signal switch 23 and the energy supply switch 22 and connects the sensor unit 30 to the safety electronic path 20.If the fault or error relates only to the energy supply, it is also possible to switch only the corresponding energy supply switch 12, 22. Similarly, if the respective active energy supply unit 11, 21 is not suffering from an error or fault, it is possible to switch only the signal switch 13, 23.

[0048] In this example, the electronic device main path 10 and the electronic device safety path 20 have the same functional scope in order to achieve complete redundancy of the electronic device main path 10 and the electronic device safety path 20. However, in alternative embodiments, the electronic device main path 10 and the electronic device safety path 20 may only have a partially identical functional scope, for example to provide redundancy for only safety-related functions.

[0049] Therefore, according to the embodiment described above, the rotation angle detection system 1 does not have redundant sensor units with respective electronic device paths for signal processing, but rather the redundancy is transferred to signal processing by individual paths that are at least partially redundantly configured by the main electronic device path 10 and the safety electronic device path 20, and each of these individual paths can be connected to a sensor unit 30 that is not implemented redundantly.

[0050] FIG. 2 is a schematic diagram of a rotation angle detection system 1′ for a railway vehicle according to a second exemplary embodiment. The rotation angle detection system 1′ of the second embodiment differs from the rotation angle detection system 1 of the first embodiment in that the sensor unit in the second embodiment is constituted by a resolver 30′. The rotation angle detection system 1′ further includes an electronic main path 10′ and an electronic safety path 20′ connected to the resolver 30′, and energy supply in the form of an excitation signal for the resolver 30′ and signal processing of the sine wave signal and cosine wave signal received by the resolver 30′ are performed via resolver-to-digital converters 18 and 28 provided in the electronic main path 10′ and the electronic safety path 20′, respectively. The excitation signal can be transmitted to the resolver 30′ by the resolver-to-digital converter 18 in the electronic main path 10′ or the resolver-to-digital converter 28 in the electronic safety path 20′ depending on the opening and closing of the respective excitation signal switches 13a′ and 23a′. In response to an excitation signal related to the current rotation angle of the rotary brake drive, a resolver 30' outputs a sine wave signal and a cosine wave signal. The sine wave signals are selectively transmitted to a resolver-to-digital converter 18 in the main electronics path 10' or a resolver-to-digital converter 28 in the safety electronics path 20' depending on the switch position of a sine wave signal switch 13b', 23b' arranged in both the main electronics path 10' and the safety electronics path 20'. In alternative embodiments, for example, for control reasons, it may be specified to transmit the sine wave signals to both the resolver-to-digital converter 18 in the main electronics path 10' and the resolver-to-digital converter 28 in the safety electronics path 20'. Similar to the transmission of the sine wave signal, the cosine wave signal is selectively transmitted to the resolver-to-digital converter 18 in the electronic device main path 10' or the resolver-to-digital converter 28 in the electronic device safety path 20' depending on the switch position of the cosine wave signal switch 13c', 23c' arranged in both the electronic device main path 10' and the electronic device safety path 20'.In alternative embodiments, it may also be specified to transmit a cosine wave signal to the resolver-to-digital converter 18 in the main electronics path 10' as well as to the resolver-to-digital converter 28 in the safe electronics path 20', e.g., for control reasons.

[0051] Each resolver-to-digital converter 18, 28 is configured to determine the rotation angle of the rotary brake drive unit by forming an arctangent from the transmitted sine wave signal and cosine wave signal, and output the determined rotation angle to a higher-level control unit, such as control unit 40. [Explanation of symbols]

[0052] 1,1' Rotation Angle Detection System 10,10' Main electronics path 11 Energy supply unit (main path for electronic devices) 12 Energy supply switch (main path for electronic devices) 13 Signal switch (electronic device main path) 13a' Excitation signal switch (main path of electronic device) 13b' Sine wave signal switch (electronic device main path) 13c' Cosine wave signal switch (electronic main path) 14 Signal converter (main path for electronic devices) 15 Signal processing unit (main path for electronic devices) 16 Signal output unit (main path for electronic devices) 17 Drive control signal (main path of electronic device) 18 Resolver digital converter (main electronics path) 20,20' Electronic Device Safety Route 21 Energy supply unit (electronic device safety path) 22 Energy supply switch (electronic device safety path) 23 Signal switch (electronic safety path) 23a' Excitation signal switch (electronic device safety path) 23b' Sine wave signal switch (electronic safety path) 23c' Cosine wave signal switch (electronic safety path) 24 Signal converter (electronic device safety path) 25 Signal Processing Unit (Electronic Device Safety Path) 26 Signal Processing Unit (Electronic Device Safety Path) 27 Drive control signal (electronic safety path) 28 Resolver Digital Converter (Electronic Safety Path) 30 Sensor Unit 30' resolver 40 Control Unit

Claims

1. A rotation angle detection system (1, 1') for detecting the rotation angle of a rotary brake drive for a railway vehicle, comprising: at least one sensor unit (30, 30') for detecting a rotation angle, which is operatively connectable to said rotary brake drive; each sensor unit (30, 30') has at least one electronic device main path (10, 10') and at least one electronic device safety path (20, 20'), and each of the at least one electronic device main path (10, 10') and the at least one electronic device safety path (20, 20') is functionally connectable to at least one of the sensor units (30, 30') as an individual path; A rotation angle detection system (1, 1'), wherein at least one of the electronic device main path (10, 10') and at least one of the electronic device safety path (20, 20') each has at least one signal processing unit (14, 15, 16, 18, 24, 25, 16, 28).

2. 2. The rotation angle detection system according to claim 1, wherein the sensor unit (30, 30') is configured with a higher failure safety than at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20'), and in particular has a characteristic of being less likely to be lost.

3. 3. The rotation angle detection system (1, 1') according to claim 1 or 2, wherein the signal processing unit of at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') comprises at least one signal converter (14, 18, 24, 28).

4. 4. The rotation angle detection system (1, 1') according to claim 1, wherein the signal processing unit of at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') comprises at least one signal processing unit (15, 18, 25, 28).

5. 5. The rotation angle detection system (1, 1') according to claim 1, wherein the signal processing unit of at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') comprises at least one signal output unit (16, 18, 26, 28).

6. 6. The rotation angle detection system (1, 1') according to claim 1, wherein at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') comprises at least one signal switch (13, 13a', 13b', 13c', 23, 23a', 23b', 23c'), via which at least one of the signal processing units (14, 15, 16, 18, 24, 25, 16, 28) is functionally connectable to at least one of the sensor units (30, 30').

7. 7. A rotation angle detection system (1, 1') according to claim 1, wherein at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') has at least one energy supply unit (11, 21), which is connectable to at least one of the sensor units (30, 30').

8. 8. The rotation angle detection system (1, 1') according to claim 1, wherein at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') has at least one energy supply switch (12, 22), via which at least one of the energy supply units (11, 21) can be functionally connected to at least one of the sensor units (30, 30').

9. 9. The rotation angle detection system (1, 1') according to claim 6 or 8, wherein at least one of the main electronic device paths (10, 10') and / or at least one of the safety electronic device paths (20, 20') and / or at least one of the signal switches (13, 13a', 13b', 13c', 23, 23a', 23b', 23c') and / or at least one of the energy supply switches (12, 22) can be controlled via a drive control signal (17, 27) of a drive control unit (18, 40).

10. 10. The rotation angle detection system (1') according to any one of claims 1 to 9, wherein the sensor unit (30') is a resolver (30') or comprises at least one resolver (30').

11. 11. The rotation angle detection system (1') according to claim 10, wherein at least one of the main electronics path (10, 10') and / or at least one of the safety electronics path (20, 20') comprises at least one resolver-to-digital converter (18, 28).

12. 12. The rotation angle detection system (1') according to claim 11, wherein at least one of the resolver digital converters (18, 28) is configured to magnetically excite a rotor of the resolver (30'), in particular with a constant amplitude AC voltage, and to receive sine and cosine wave signals of a stator of the resolver (30').

13. 13. The rotation angle detection system (1′) according to claim 12, wherein at least one of the resolver digital converters (18, 28) or another signal processing unit (14, 15, 16, 24, 25, 16) is configured to determine the rotation angle position from the sine wave signals and the cosine wave signals of the stator of the resolver (30′), in particular taking into account the number of pole pairs of the resolver (30′).

14. 1. A braking system for a rail vehicle, comprising: at least one brake actuator for applying a braking force; at least one rotary brake driver for operating the brake actuator; A braking system comprising at least one rotation angle detection system (1, 1') according to any one of claims 1 to 13.

15. A railway vehicle equipped with at least one rotation angle detection system (1, 1') according to any one of claims 1 to 13 and / or a brake system according to claim 14, A railway vehicle, wherein at least the sensor units (30, 30') are arranged on a bogie of the railway vehicle.

Images