Abstract: The disclosure provides a magnetic yoke iron core and a brake including a magnetic yoke iron core, a first movable plate, a plurality of friction disks, at least one second movable plate, a coil, an armature and an elastic part; the first movable plate is located in a first mounting space and close to a first shaft end; a plurality of friction disks are sequentially arranged in the first mounting space along an axial direction of the magnetic yoke iron core and located at a side of the first movable plate close to a second shaft end; the coil is arranged in a second mounting space; the armature is connected with the first movable plate through a connector; the second movable plate is connected with the connector; and the elastic part having a pre-tightening force which enables the armature to be far away from the magnetic yoke iron core.

Abstract: The application relates to the technical field of control, and provides an electromagnetic brake control apparatus. The apparatus includes: a power supply management circuit, a first switch circuit, a freewheeling diode and a first control output end and a second control output end used to connect with two ends of an electromagnetic coil of the electromagnetic brake; the power supply management circuit includes: a power supply input end, a first output end and a second output end used to connect with an external power supply; an input end and an output end of the first switch circuit are respectively connected with the first output end and the first control output end, the first switch circuit is configured with a pulse width modulation function; a cathode and an anode of the freewheeling diode are respectively connected with the second output end and the first control output end.

Abstract: The disclosure provides a brake including a magnetic yoke iron core, a movable plate, a friction disk, a coil, an armature and an elastic part; a first mounting space penetrates through a center position of the magnetic yoke iron core in the axial direction; an opening of a second mounting space faces a second shaft end; the movable plate is located in the first mounting space and close to a first shaft end; the friction disk is arranged in the first mounting space and located at a side of the movable plate close to the second shaft end; the coil is arranged in the second mounting groove; the armature is located at the second shaft end, and the armature is connected with the movable plate through a connector; and the elastic part has pre-tightening force that enables the armature to be far away from the magnetic yoke iron core.

Abstract: The disclosure provides a friction disk and a brake including a magnetic yoke iron core, a first movable plate, a friction disk, a first coil, at least one second coil, an armature and an elastic part; the magnetic yoke iron core includes a first mounting space, a second mounting space and at least one third mounting space distributed coaxially; the first movable plate is located in the first mounting space and close to a first shaft end; the friction disk is located in the first mounting space; the first coil is arranged in the second mounting space; the at least one second coil correspondingly is arranged in the at least one third mounting space; the armature is located at the second shaft end; the elastic part has a pre-tightening force that enables the armature to be far away from the magnetic yoke iron core.

Abstract: The disclosure provides a brake including a magnetic yoke iron core, a movable plate, a friction disk, a coil, an armature and an elastic part; a first mounting space penetrates through a center position of the magnetic yoke iron core in the axial direction; an opening of a second mounting space faces a second shaft end; the movable plate is located in the first mounting space and close to a first shaft end; the friction disk is arranged in the first mounting space and located at a side of the movable plate close to the second shaft end; the coil is arranged in the second mounting groove; the armature is located at the second shaft end, and the armature is connected with the movable plate through a connector; and the elastic part has pre-tightening force that enables the armature to be far away from the magnetic yoke iron core.

Abstract: The disclosure provides a magnetic yoke iron core and a brake including a magnetic yoke iron core, a first movable plate, a plurality of friction disks, at least one second movable plate, a coil, an armature and an elastic part; the first movable plate is located in a first mounting space and close to a first shaft end; a plurality of friction disks are sequentially arranged in the first mounting space along an axial direction of the magnetic yoke iron core and located at a side of the first movable plate close to a second shaft end; the coil is arranged in a second mounting space; the armature is connected with the first movable plate through a connector; the second movable plate is connected with the connector; and the elastic part having a pre-tightening force which enables the armature to be far away from the magnetic yoke iron core.

Abstract: The application relates to the technical field of control, and provides an electromagnetic brake control apparatus. The apparatus includes: a power supply management circuit, a first switch circuit, a freewheeling diode and a first control output end and a second control output end used to connect with two ends of an electromagnetic coil of the electromagnetic brake; the power supply management circuit includes: a power supply input end, a first output end and a second output end used to connect with an external power supply; an input end and an output end of the first switch circuit are respectively connected with the first output end and the first control output end, the first switch circuit is configured with a pulse width modulation function; a cathode and an anode of the freewheeling diode are respectively connected with the second output end and the first control output end.

Abstract: Provided is a polypropylene film, and a method of making the film, the film comprising at least one core layer sandwiched between at least two skin layers, the layers comprising a core layer comprising polypropylene and within the range of from 20 wt % to 50 wt %, by weight of the materials in the core layer, of a propylene-?-olefin elastomer having within the range of from 5 wt % to 25 wt % ?-olefin derived units, by weight of the copolymer; and skin layers comprising one or more polymers having a melting point within the range of from 125° C. to 160° C., a Shore D Hardness within the range of from 55 to 70, and a Flexural Modulus of at least 600 MPa; wherein the film has a Haze value of less than 10%, the film being biaxially oriented but shrinkable substantially only in the MD.