Abstract: The invention relates to a valve arrangement (10) comprising valves and coil arrangements (20), each coil arrangement (20) having two coils (110, 210) which are electrically connected to separate control units (100, 200). Each valve can be independently actuated by either the first coil (110) or the second coil (210) of the coil arrangement (20) associated therewith. The invention further relates to a brake system (400, 500) having such a valve arrangement (10).

Abstract: Provided in a device for activating a wheel brake of a vehicle, having a tensioning installation which has a spindle drive, are two electric motors, the first electric motor by way of a first gear mechanism acting bi-directionally on the spindle drive. In order for the position of the tensioning installation, once attained, to be fixed in a parking brake, a second electric motor by way of a second gear mechanism, which has a self-locking worm gear mechanism and by way of at least one releasable coupling that acts uni-directionally in the activating direction, is coupled to the spindle drive. The coupling is composed of a cam on an output shaft of the first gear mechanism, and a pin on an output element of the worm gear mechanism. Since the cam cannot be reversed beyond the pin, a latching position of the tensioning installation is defined in this way.

Abstract: An electric hollow-shaft motor having a hollow shaft which is able to be driven in rotation, and a detection device which is configured to detect the rotational position of the hollow shaft, wherein the detection device includes a magnet which is arranged on the hollow shaft, and a fixed magnetic field sensor which is arranged within the hollow shaft, wherein the magnetic field sensor is configured to detect a magnetic field generated by the magnet.

Abstract: An electric drum brake for a rotatable element of a passenger motor vehicle. The drum brake has a brake drum and a brake surface which is connected rotationally conjointly to the brake drum, and also an electromagnet arrangement, wherein multiple brake shoes can be pushed against the brake drum by the electromagnet arrangement, and wherein the drum brake has a preloading arrangement which preloads the electromagnet arrangement into a position spaced apart from the brake surface.

Abstract: An electric machine includes an annular stator and a rotor disposed within the stator. The stator has a plurality of stator segments in the circumferential direction and a stator winding applied to a winding support. Each stator segment has lateral cutouts in the circumferential direction. In each case a winding support having a toroidally applied stator winding is introduced into lateral cutouts, which are adjacent in the circumferential direction, of adjacent stator segments. The radial outer side of the stator winding is partially surrounded by stator segment outer arms of mutually adjacent stator segments in such a way that a radially directed outer gap is formed between the stator segment outer arms of the two mutually adjacent stator segments.

Abstract: An electric machine includes an annular stator and a rotor disposed within the stator. The stator has a multiplicity of stator segments in a circumferential direction. Each of the stator segments has one or more inner grooves, disposed in the region of the inner circumference of the stator segment, and a winding window which is disposed in the region of the outer circumference of the stator segment. A stator winding is wound in toroidal fashion around the stator segment. The winding window is partially surrounded at its radial outer side by stator segment outer arms in such a way that a radially directed outer gap extending from the winding window to the outer circumference of the stator segment is formed between the stator segment outer arms.

Abstract: A method for operating a permanent magnet synchronous motor, an operational vector being determined in a multi-stage process. A motor assembly configured to perform such a method is also disclosed.

Abstract: A brake installation for a motor vehicle. First and second pressure provision devices build up brake pressure in the wheel brakes. The first pressure device connected to a first wheel brake of a first brake circuit and to a second wheel brake of the first brake circuit. The second pressure device connected to a third wheel brake of a second brake circuit and to a fourth wheel brake of the second brake circuit. Each pressure device is respectively activated by an open-loop/closed-loop control unit. A first hydraulic line, with a normally open isolating valve, connects the first wheel brake line of the first brake circuit to the first wheel brake line of the second brake circuit. A second hydraulic line, with a normally open isolating valve, connects the second wheel brake line of the first brake circuit to the second wheel brake line of the second brake circuit.

Abstract: A method for operating a permanent magnet synchronous motor, an operational vector being determined in a multi-stage process. A motor assembly configured to perform such a method is also disclosed.

Abstract: An electric machine includes an annular stator and a rotor disposed within the stator. The stator has a multiplicity of stator segments in a circumferential direction. Each of the stator segments has one or more inner grooves, disposed in the region of the inner circumference of the stator segment, and a winding window which is disposed in the region of the outer circumference of the stator segment. A stator winding is wound in toroidal fashion around the stator segment. The winding window is partially surrounded at its radial outer side by stator segment outer arms in such a way that a radially directed outer gap extending from the winding window to the outer circumference of the stator segment is formed between the stator segment outer arms.

Abstract: An electric machine includes an annular stator and a rotor disposed within the stator. The stator has a plurality of stator segments in the circumferential direction and a stator winding applied to a winding support. Each stator segment has lateral cutouts in the circumferential direction. In each case a winding support having a toroidally applied stator winding is introduced into lateral cutouts, which are adjacent in the circumferential direction, of adjacent stator segments. The radial outer side of the stator winding is partially surrounded by stator segment outer arms of mutually adjacent stator segments in such a way that a radially directed outer gap is formed between the stator segment outer arms of the two mutually adjacent stator segments.

Abstract: An electric hollow-shaft motor having a hollow shaft which is able to be driven in rotation, and a detection device which is configured to detect the rotational position of the hollow shaft, wherein the detection device includes a magnet which is arranged on the hollow shaft, and a fixed magnetic field sensor which is arranged within the hollow shaft, wherein the magnetic field sensor is configured to detect a magnetic field generated by the magnet.

Abstract: The invention relates to a valve arrangement (10) comprising valves and coil arrangements (20), each coil arrangement (20) having two coils (110, 210) which are electrically connected to separate control units (100, 200). Each valve can be independently actuated by either the first coil (110) or the second coil (210) of the coil arrangement (20) associated therewith. The invention further relates to a brake system (400, 500) having such a valve arrangement (10).

Abstract: A brake system comprises a cylinder-piston unit movable by an electromechanical actuator. Wheel brakes associated with at least one axle can be supplied with braking pressure via the hydraulic pressure chamber. The electromechanical actuator comprises a rotation-translation transmission and an electronically commutated synchronous machine having a stator with at least two phase windings, a rotor comprising at least one permanent magnet and at least one rotor position sensor. A torque-forming current and/or a magnetic field attenuating current are adjusted in a co-ordinate system which is fixed relative to the rotor. Voltages in the co-ordinate system are detected to serve as control variables and are transformed into a voltage phasor, which indicates for each phase winding of the stator, a voltage to be applied, and a set value for the magnetic field attenuating current is limited to a maximum value being determined from a predetermined characteristic map.

Abstract: A permanent-magnet synchronous machine comprises a rotor and a stator for holding at least one first stator winding and a second stator winding which is electrically insulated from said first stator winding. The second stator winding has a smaller conductor cross section and a larger number of turns than the first stator winding, wherein a first operating voltage is provided for motor operation of the first stator winding and a second operating voltage is provided for motor operation of the second stator winding. The second operating voltage has a higher rated voltage than a rated voltage of the first operating voltage.

Abstract: A brake installation for a motor vehicle. First and second pressure provision devices build up brake pressure in the wheel brakes. The first pressure device connected to a first wheel brake of a first brake circuit and to a second wheel brake of the first brake circuit. The second pressure device connected to a third wheel brake of a second brake circuit and to a fourth wheel brake of the second brake circuit. Each pressure device is respectively activated by an open-loop/closed-loop control unit. A first hydraulic line, with a normally open isolating valve, connects the first wheel brake line of the first brake circuit to the first wheel brake line of the second brake circuit. A second hydraulic line, with a normally open isolating valve, connects the second wheel brake line of the first brake circuit to the second wheel brake line of the second brake circuit.

Abstract: A linear actuator for generating a linear actuating force, including a first drive unit having a first drive shaft designed as a hollow shaft, a first rotation-translation transmission driven by the first drive unit, having a first threaded spindle and a first threaded nut engaging with the threaded spindle, wherein the drive shaft of the first drive unit is designed as a first threaded spindle, a second drive unit arranged axially to the first drive unit and having a drive shaft, and a second rotation-translation transmission driven by the second drive unit, having a second threaded spindle and a threaded nut engaging with the second threaded spindle, wherein the drive shaft of the second drive unit is connected to the second threaded spindle; via the hollow shaft in a rotationally fixed manner.

Abstract: A permanent-magnet synchronous machine comprises a rotor and a stator for holding at least one first stator winding and a second stator winding which is electrically insulated from said first stator winding. The second stator winding has a smaller conductor cross section and a larger number of turns than the first stator winding, wherein a first operating voltage is provided for motor operation of the first stator winding and a second operating voltage is provided for motor operation of the second stator winding. The second operating voltage has a higher rated voltage than a rated voltage of the first operating voltage.

Abstract: A method for operating an electronically commutated synchronous machine, having a stator with at least two, in particular three, phase windings and a rotor having at least one permanent magnet. A control factor is determined periodically for each phase winding. The time periods during which an upper and lower supply voltage is applied to the phase winding are determined based on the control factor. The electronically commutated synchronous machine is actuated according to space vector modulation. Zero vectors are applied to the phase windings at the beginning and/or end of a period for a switch-off duration. All switches connected to the upper supply voltage or all switches connected to the lower supply voltage are on. The selection of the zero vector is performed in accordance with the phase winding with the greatest, in magnitude, deviation from the average control factor. As disclosed is an actuation circuit and the use thereof.

Abstract: A brake system comprises a cylinder-piston unit movable by an electromechanical actuator. Wheel brakes associated with at least one axle can be supplied with braking pressure via the hydraulic pressure chamber. The electromechanical actuator comprises a rotation-translation transmission and an electronically commutated synchronous machine having a stator with at least two phase windings, a rotor comprising at least one permanent magnet and at least one rotor position sensor. A torque-forming current and/or a magnetic field attenuating current are adjusted in a co-ordinate system which is fixed relative to the rotor. Voltages in the co-ordinate system are detected to serve as control variables and are transformed into a voltage phasor, which indicates for each phase winding of the stator, a voltage to be applied, and a set value for the magnetic field attenuating current is limited to a maximum value being determined from a predetermined characteristic map.