Brake monitoring
AssigneeKonecranes Global Corporation
InventorAapo Jantunen
Life of this patent
Estimating the term…
Abstract
Monitoring a brake that includes first and second braking surfaces and a magnetizing device that, in response to the electric current supplied to them, are arranged to generate a magnetic field that is arranged to move the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other. Determining the electric current of the brake as the braking surfaces begin to move from the closed state to the open state, determining the maximum electric current of the magnetizing device of the brake in the open state, determining the condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to the maximum electric current.
Claims33
A method for monitoring a brake that comprises:
- first and second braking surfaces, and
- magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other;
- the method comprising:
- generating the magnetic field by the magnetizing means to move the braking surfaces from the closed state, in which the braking surfaces are connected to each other, to the open state, in which the braking surfaces are separated from each other;
- determining the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state,
- determining a maximum electric current of the magnetizing means of the brake in the open state;
- determining a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to said maximum electric current.
A device for monitoring an electromagnetic brake comprising first and second braking surfaces and magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other, the device being configured to:
- determine the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state, wherein the device is configured to
- determine a maximum electric current of the magnetizing means of the brake in the open state;
- determine a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to the maximum electric current.
A computer program product comprising a non-transitory computer-readable storage medium having program instructions that when downloaded into a device cause the device to execute a method for monitoring a brake that comprises:
- first and second braking surfaces, and
- magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other;
- the method comprising:
- determining the electric current of the brake as the braking surfaces begin to move from the closed state to the open state;
- determining a maximum electric current of the magnetizing means of the brake in the open state;
- determining a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to said maximum electric current.
A device comprising means for carrying out a method
- for monitoring a brake that comprises:
- first and second braking surfaces, and
- magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other;
- the method comprising:
- determining the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state;
- determining a maximum electric current of the magnetizing means of the brake in the open state;
- determining a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to said maximum electric current.
An arrangement comprising a device for monitoring an electromagnetic brake comprising first and second braking surfaces and magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other, the device being configured to:
- determine the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state, wherein the device is configured to
- determine a maximum electric current of the magnetizing means of the brake in the open state;
- determine a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to the maximum electric current.
An arrangement comprising a device comprising means for carrying out a method
- for monitoring a brake that comprises:
- first and second braking surfaces, and
- magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other;
- the method comprising:
- determining the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state;
- determining a maximum electric current of the magnetizing means of the brake in the open state;
- determining a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to said maximum electric current.
A method for upgrading a hoisting device with a monitoring function, wherein the hoisting device comprises an electromagnetic brake comprising first and second braking surfaces and magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other, the method comprising:
- installing, in connection with an electromagnetic brake, a computer program product that comprises program instructions configured to cause the hoisting device to:
- determine the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state;
- determine a maximum electric current of the magnetizing means of the brake in the open state;
- determine a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to said maximum electric current.
A method for upgrading a hoisting device with a monitoring function, wherein the hoisting device comprises an electromagnetic brake comprising first and second braking surfaces and magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other, the method comprising:
- installing, in connection with an electromagnetic brake, a device comprising means for:
- determining the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state;
- determining a maximum electric current of the magnetizing means of the brake in the open state;
- determining a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to said maximum electric current.
A method for upgrading a hoisting device with a monitoring function, wherein the hoisting device comprises an electromagnetic brake comprising first and second braking surfaces and magnetizing means which, in response to an electric current supplied to the magnetizing means, are configured to generate a magnetic field that moves the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other, the method comprising:
- installing, in connection with an electromagnetic brake, a device being configured to:
- determine the electric current of the magnetizing means as the braking surfaces begin to move from the closed state to the open state, wherein the device is configured to
- determine a maximum electric current of the magnetizing means of the brake in the open state;
- determine a condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to the maximum electric current.
Dependencies are inferred from the claim text.