An electromagnetic brake with a housing body and a coil unit, wherein the coil unit has a positive connection to the housing body, wherein the coil unit is positively connected to the housing body by means of a snap-fit connection, wherein at least one snap hook of the coil unit is supported on a web of the housing body.

A brake, a method for judging its state, a traction machine, and an elevator system. The traction machine and the elevator system include the brake. The brake includes a moving plate, and a fixed element having a fixed position relative to a base of the brake, and the brake further includes a first solenoid coil and a first ferromagnetic body; the first solenoid coil is disposed on one of the moving plate and the fixed element, the first ferromagnetic body is disposed on the other of the moving plate and the fixed element, a relative position of the first solenoid coil and the first ferromagnetic body is set such that the inductance of the first solenoid coil can change with the distance between the moving plate and the fixed element.

An elevator brake assembly including an asymmetrical brake comprising at least three brake segments, a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element, wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments.

An elevator brake assembly including an asymmetrical brake comprising at least three brake segments, a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element, wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments.

Brake release sensors for an elevator can be replaced by an arrangement wherein the brake release is determined from the force caused by the brake. This is achieved by providing measuring device for measuring the weight of an elevator car between the brake and the motor body so that the weight of the elevator car is measured only when the brake is on.

Brake release sensors for an elevator can be replaced by an arrangement wherein the brake release is determined from the force caused by the brake. This is achieved by providing measuring device for measuring the weight of an elevator car between the brake and the motor body so that the weight of the elevator car is measured only when the brake is on.

A lifting device includes a motor designed as a three-phase asynchronous motor via which the lifting device can be driven to lift and lower a load, and includes a brake resistor via which a power output resulting from a motor generator operation that is carried out when lowering the load at a lowering speed can be converted into heat. The brake resistor is designed for a rated power which is less than the power resulting with a nominal load and a nominal speed. A method for operating a lifting device includes lowering a load at a lowering speed while taking into consideration at least one load capacity characteristic value of the brake resistor for the lowering speed, a threshold is set such that while lowering the load at the lowering speed corresponding to the threshold, the resulting power output is limited to the at least one load capacity characteristic value.

A lifting device includes a motor designed as a three-phase asynchronous motor via which the lifting device can be driven to lift and lower a load, and includes a brake resistor via which a power output resulting from a motor generator operation that is carried out when lowering the load at a lowering speed can be converted into heat. The brake resistor is designed for a rated power which is less than the power resulting with a nominal load and a nominal speed. A method for operating a lifting device includes lowering a load at a lowering speed while taking into consideration at least one load capacity characteristic value of the brake resistor for the lowering speed, a threshold is set such that while lowering the load at the lowering speed corresponding to the threshold, the resulting power output is limited to the at least one load capacity characteristic value.

A hoist brake system is disclosed. The brake system incorporates an electro-mechanical device that acts as a fail-safe stopping mechanism for a hoist and has a default engaged. This allows the brake system to quickly and safely stop a device when power is lost, an emergency signal is provided or any other fault condition and be completely self-contained within the hoist itself.

The present invention relates to a lifting device for example in the form of a crane such as a tower crane, with a hoisting gear comprising a hoisting cable which runs off from a drum that can be driven by a hoisting gear drive, and a hoisting gear brake for holding the hoisting cable in a braked position. The invention furthermore relates to a method for starting up the hoisting gear of such a lifting device from the braked position in which the hoisting gear brake holds a hoisting load, wherein a starting torque is built up by a hoisting gear drive against the closed hoisting gear brake, and the hoisting gear brake is released upon or after reaching the starting torque. According to the invention it is proposed that when the hoisting gear brake is closed, the current hoisting load is detected by means of a load detection device and the starting torque is adjusted by the hoisting gear controller with reference to the detected current hoisting load such that the hoisting force provided by the starting torque of the hoisting gear corresponds to the detected, current hoisting load.