Abstract: A method of processing web requests directed to a website includes, at a system for processing web requests: (i) for each of a plurality of web requests directed to a website, determining a request vector corresponding to the web request, wherein each request vector represents multiple predetermined features of the respective web request; (ii) clustering the request vectors by respectively assigning each request vector to one of a plurality of clusters using a clustering algorithm; (iii) repeatedly updating the clustering of request vectors using the clustering algorithm such that the plurality of clusters dynamically change over time; (iv) monitoring cluster metadata associated with each cluster as the plurality of clusters dynamically change over time, (v) identifying, based on monitoring, any cluster meeting a predetermined anomaly criterion indicating that the cluster is displaying anomalous behaviour; and (vi) triggering an investigation of a cluster identified as meeting the predetermined anomaly criter

Abstract: A method for operating an electrically commutated machine. In at least one method step, in particular in at least one method step of overmodulation operation of the electrically commutated machine, a precommutation angle of the electrically commutated machine is set depending on an efficiency of the electrically commutated machine.

Abstract: A method for operating an electrically commutated machine. In at least one method step, in particular in at least one method step of overmodulation operation of the electrically commutated machine, a precommutation angle of the electrically commutated machine is set depending on an efficiency of the electrically commutated machine.

Abstract: The invention relates to a method for determining a rotor position of a rotatory, multi-phase, electronically commutated electric machine (1). Said electric machine (1) comprises several phase windings (4) which can be supplied with current by means of phase connectors. Said method consists of the following steps: phase currents and phase connections are identified on phase connections of the electric machine (1); the induced currents on the phase connections of the electric machine (1) are determined from the identified phase currents and phase flows; the identified current indicator of the induced current is provided with respect to a Cartesian coordination system which is fixed to a stator by the induced currents; the position of the rotor is identified as a space indicator angle of the current indicator of the induced current provided with respect to the Cartesian coordination system which is fixed to the stator.

Abstract: The invention relates to a method for determining a correction parameter for a measurement channel (6) which is connected to a connection terminal (3) of an electric motor (2) in order to measure a terminal voltage (U1, U2), characterized in that the connection terminal (3) is connected to a first potential via switching elements (T1, T2, T3, T4) for driving the electric motor (2), after a steady state of the measurement channel (6) has been reached, the connection terminal (3) is connected to a second potential, which differs from the first, by changing over at least one switching element (T1, T2, T3, T4), the dynamic response of the measurement channel (6) is detected following connection to the second potential, and the correction parameter for the dynamic response of the measurement channel (6) is determined on the basis of the detected dynamic response of the latter.

Abstract: A method for determining a time for a zero crossing of a phase current in a polyphase electrical machine (2). The method including driving a driver circuit (31; 50) for providing phase voltages to operate the electrical machine (2); deactivating a pulse-width-modulated driving by at least one power switch (36, 37; 52, 53), such that no potential is applied to connecting nodes (AI, A2, B1, B2) by the driver circuit (31; 50), at least during a time segment in each cycle of the pulse width modulation; detecting a diode voltage via a freewheeling diode, with which the deactivated power switch (36, 37; 52, 53) has been provided, within the time segment; and fixing the time for the zero crossing of the phase current as the time after which there is no longer a diode voltage present across the freewheeling diode (40; 54) within the time segment.

Abstract: A control device for controlling an electronically commutated motor. The control device includes a control input for a rotor position signal and a control output for connection to field coils of the motor, and generates a load current for displacing a rotor of the motor depending on the rotor position signal outputting said load current via the control output. The control device includes at least one semiconductor switch for switching the load current depending on a semiconductor control signal, and includes at least one pulse generator which generates the load current in the form of a pulsed control signal for displacing the rotor. The control device also includes a delta sigma converter which is at least indirectly connected to the control input on the input side and which is designed to produce the semiconductor control signal in the form of a digital bit stream depending on the rotor position signal.

Abstract: The invention relates to a method for determining a rotor position of a rotatory, multi-phase, electronically commutated electric machine (1). Said electric machine (1) comprises several phase windings (4) which can be supplied with current by means of phase connectors. Said method consists of the following steps: phase currents and phase connections are identified on phase connections of the electric machine (1); the induced currents on the phase connections of the electric machine (1) are determined from the identified phase currents and phase flows; the identified current indicator of the induced current is provided with respect to a Cartesian coordination system which is fixed to a stator by the induced currents; the position of the rotor is identified as a space indicator angle of the current indicator of the induced current provided with respect to the Cartesian coordination system which is fixed to the stator.

Abstract: The invention relates to a method for determining a correction parameter for a measurement channel (6) which is connected to a connection terminal (3) of an electric motor (2) in order to measure a terminal voltage (U1, U2), characterized in that the connection terminal (3) is connected to a first potential via switching elements (T1, T2, T3, T4) for driving the electric motor (2), after a steady state of the measurement channel (6) has been reached, the connection terminal (3) is connected to a second potential, which differs from the first, by changing over at least one switching element (T1, T2, T3, T4), the dynamic response of the measurement channel (6) is detected following connection to the second potential, and the correction parameter for the dynamic response of the measurement channel (6) is determined on the basis of the detected dynamic response of the latter.

Abstract: A method for determining a time for a zero crossing of a phase current in a polyphase electrical machine (2). The method including driving a driver circuit (31; 50) for providing phase voltages to operate the electrical machine (2); deactivating a pulse-width-modulated driving by at least one power switch (36, 37; 52, 53), such that no potential is applied to connecting nodes (AI, A2, B1, B2) by the driver circuit (31; 50), at least during a time segment in each cycle of the pulse width modulation; detecting a diode voltage via a freewheeling diode, with which the deactivated power switch (36, 37; 52, 53) has been provided, within the time segment; and fixing the time for the zero crossing of the phase current as the time after which there is no longer a diode voltage present across the freewheeling diode (40; 54) within the time segment.

Abstract: The invention relates to an electrically commutated electrical motor having a stator and having an in particular permanent-magnetically designed rotor. The electronically commutated electrical motor also has a control unit which is connected to the stator and designed to actuate the stator for generating a magnetic rotary field. The control unit is designed to detect a voltage induced in at least one stator coil of the stator and to determine a motor torque constant representing an achievable torque in dependence on a rotational speed signal representing a rotor circumferential frequency of the rotor. According to the invention, the control unit in the electronically commutated electrical motor of the aforementioned type is designed to detect a frequency content of the motor torque constant and to actuate the stator for generating a torque in dependence of the frequency content, in particular a frequency amplitude of the motor torque constant.

Abstract: The invention relates to a control device for controlling an electronically commutated motor. The control device comprises a control input for a rotor position signal and a control output for connection to field coils of the motor. The control device is designed to generate a load current for displacing a rotor of the motor depending on the rotor position signal and to output said load current via the control output. The control device comprises at least one semiconductor switch for switching the load current depending on a semiconductor control signal. The control device comprises at least one pulse generator including the at least one semiconductor switch, said pulse generator being designed to generate the load current in the form of a pulsed control signal for displacing the rotor.

Abstract: The invention relates to a device and a method for determining the rotational angle of a rotatable element in a non-contact manner, the device including at least one magnetoresistive sensor element which emits at least one first signal for determining a rotational angle of the rotatable element in a first region. A plunger core and a coil move in relation to each other in the axial direction of a shaft according to the rotary movement of the shaft, the coil emitting another signal relating to the modification of the coil inductance, such that rotational angles beyond the first region can be clearly determined in association with the first signal.

Abstract: A probe comprises: (1) a target binding site moiety which is attached to a first fluorescent polypeptide; (ii) a mimic moiety which is capable of binding to the target binding site moiety and is attached to a second fluorescent polypeptide; and (iii) a linker which connects the two fluorescent polypeptides and which allows the distance between said fluorescent polypeptides to vary, said fluorescent polypeptides being so as to display fluorescence resonance energy transfer (FRET) between them, wherein the linker comprises one or more of: (1) a sequence capable of being recognised and bound by an immobilized component; (2) a protease cleavage site; (3) a non-analyte binding site; (4) two or more copies of the sequence (SerGly3); or (5) one or more copies of a rod domain from a structural protein.

Abstract: The invention relates to a device and to a method for contactlessly recording rotation angles of a rotating element, with a plunger core and with a coil at least partially surrounding the plunger core. The plunger core and the coil move relative to one another in an axial direction according to the rotational motion of the rotating element and causes a change in a coil inductivity of the coil. The inventive device and the inventive method are characterized in that compensating means are provided, which at least partially compensate for the influence of a changing temperature upon the coil inductivity.

Abstract: The invention relates to a device and a method for determining the rotational angle of a rotatable element in a non-contact manner, the device including at least one magnetoresistive sensor element which emits at least one first signal for determining a rotational angle of the rotatable element in a first region. A plunger core and a coil move in relation to each other in the axial direction of a shaft according to the rotary movement of the shaft, the coil emitting another signal relating to the modification of the coil inductance, such that rotational angles beyond the first region can be clearly determined in association with the first signal.

Abstract: A probe comprises: (1) a target binding site moiety which is attached to a first fluorescent polypeptide; (ii) a mimic moiety which is capable of binding to the target binding site moiety and is attached to a second fluorescent polypeptide; and (iii) a linker which connects the two fluorescent polypeptides and which allows the distance between said fluorescent polypeptides to vary, said fluorescent polypeptides being so as to display fluorescence resonance energy transfer (FRET) between them, wherein the linker comprises one or more of: (1) a sequence capable of being recognised and bound by an immobilized component; (2) a protease cleavage site; (3) a non-analyte binding site; (4) two or more copies of the sequence (SerGly3); or (5) one or more copies of a rod domain from a structural protein.

Abstract: A spindle for a ring spinning machine has an electric motor for rotating the spindle. The electric motor has a stator having a generally square configured stack of magnetically active plates. The corner regions of the stack of the stator have brackets mounted thereon which hold the plates together, and these brackets are fixedly mounted relative to the bearing housing of the spindle bank.