Abstract: An eddy-current rail brake device includes a row of magnets, a supporting member, a case, and a lifting device. The row of magnets includes a plurality of permanent magnets that are arranged in a traveling direction of a railroad car. To the supporting member, the row of magnets is mounted. The supporting member has magnetism. The case houses the row of magnets and the supporting member and includes a bottom portion that faces the row of magnets and is non-magnetic. The lifting device raises and lowers the supporting member inside the case while the row of magnets is kept facing the bottom portion. The eddy-current rail brake device can prevent or reduce adhesion of a foreign object and can be reduced in size in a right-left direction.

Abstract: An eddy-current rail brake device includes a row of magnets, a supporting member, a case, and a lifting device. The row of magnets includes a plurality of permanent magnets that are arranged in a traveling direction of a railroad car. To the supporting member, the row of magnets is mounted. The supporting member has magnetism. The case houses the row of magnets and the supporting member and includes a bottom portion that faces the row of magnets and is non-magnetic. The lifting device raises and lowers the supporting member inside the case while the row of magnets is kept facing the bottom portion. The eddy-current rail brake device can prevent or reduce adhesion of a foreign object and can be reduced in size in a right-left direction.

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

Abstract: A retarder includes a rotor, a plurality of fins, a plurality of permanent magnets, a switching mechanism, a first cover, a second cover, and a cover-switching mechanism. The fins are provided on an outer peripheral surface of the rotor and inclined with respect to a rotation direction of the rotor. The magnets are arranged inside the rotor. The first cover faces an end face of the rotor and includes a plurality of holes. The second cover protrudes from an outer circumferential edge of the first cover toward a rotor side. The cover-switching mechanism opens the holes in the braking state and closes the holes in the non-braking state. The first cover is disposed on a side on which a leading end portion of each fin is present. The retarder achieves suppressing windage and ensuring a heat dissipation performance.

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

Abstract: Disclosed is an eddy-current rail brake which includes: a magnet array which includes a plurality of permanent magnets arranged in one row so as to face toward a rail in a braking state; a holding member which holds the magnet array, the holding member being supported so as to be rotatable together with the magnet array; a cylindrical member which covers the magnet array, which is rotatable; and a driving device coupled to an end portion of the holding member. The magnet array is switchable between the braking state and a non-braking state by rotating the magnet array.

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.