A downhole-type blower system (124, 2302) comprising: a blower (200, 2304) configured to be positioned in a wellbore (104, 2300), the blower configured to rotatably drive or be driven by fluid produced through the wellbore; an electric machine (204, 2306) configured to be positioned downhole of the blower, the electric machine configured to rotatably drive or be driven by the blower; a bearing shaft coupling the blower and the electric machine, the bearing shaft configured to transfer rotation between the blower and the electric machine; a passive magnetic radial bearing assembly configured to magnetically support the bearing shaft; an active damper coupled to the bearing shaft, the damper configured to damp a vibration of the bearing shaft responsive to transferring the rotation between the blower and the electric machine, wherein the active damper assembly comprises: a damper magnet coupled to the bearing shaft, the damper magnet positioned between the plurality of radial bearing assemblies, wherein the vibration of the bearing shaft induces an induced vibration in the damper magnet; a first damper magnet pole shoe and a second damper magnet pole shoe coupled to a first pole and a second pole, respectively of the damper magnet, the first damper magnet pole shoe and the second damper magnet pole shoe configured to maintain uniformity of magnetic fields generated by the damper magnet; and a damper sleeve positioned over outer diameters of the damper magnet, the first damper magnet pole shoe and the second damper magnet pole shoe. a blower (200, 2304) configured to be positioned in a wellbore (104, 2300), the blower configured to rotatably drive or be driven by fluid produced through the wellbore; an electric machine (204, 2306) configured to be positioned downhole of the blower, the electric machine configured to rotatably drive or be driven by the blower; a bearing shaft coupling the blower and the electric machine, the bearing shaft configured to transfer rotation between the blower and the electric machine; a passive magnetic radial bearing assembly configured to magnetically support the bearing shaft; an active damper coupled to the bearing shaft, the damper configured to damp a vibration of the bearing shaft responsive to transferring the rotation between the blower and the electric machine, wherein the active damper assembly comprises: a damper magnet coupled to the bearing shaft, the damper magnet positioned between the plurality of radial bearing assemblies, wherein the vibration of the bearing shaft induces an induced vibration in the damper magnet; a first damper magnet pole shoe and a second damper magnet pole shoe coupled to a first pole and a second pole, respectively of the damper magnet, the first damper magnet pole shoe and the second damper magnet pole shoe configured to maintain uniformity of magnetic fields generated by the damper magnet; and a damper sleeve positioned over outer diameters of the damper magnet, the first damper magnet pole shoe and the second damper magnet pole shoe. a damper magnet coupled to the bearing shaft, the damper magnet positioned between the plurality of radial bearing assemblies, wherein the vibration of the bearing shaft induces an induced vibration in the damper magnet; a first damper magnet pole shoe and a second damper magnet pole shoe coupled to a first pole and a second pole, respectively of the damper magnet, the first damper magnet pole shoe and the second damper magnet pole shoe configured to maintain uniformity of magnetic fields generated by the damper magnet; and a damper sleeve positioned over outer diameters of the damper magnet, the first damper magnet pole shoe and the second damper magnet pole shoe.