Water-cooled permanent magnet speed regulator

The invention discloses a water-cooled permanent magnet speed regulator, which comprises a speed regulator shell, a magnetizer outer ring located on the inner surface of the speed regulator shell anda motor shaft penetrating through the speed regulator shell. The invention relates to the technical field of permanent magnet speed regulators. According to the water-cooled permanent magnet speed regulator, a spiral copper pipe is arranged in a magnetizer outer ring, a first liquid storage tank is arranged on one side of the magnetizer outer ring, and a liquid inlet pipe, a connecting air pipe and a liquid conveying pipe are matched, so that a cooling liquid can be introduced into the spiral copper pipe so as to abaorb a large amount of heat energy in the magnetizer outer ring; and the cooling liquid is conveyed into the interior of a second liquid storage tank, and after cooling is completed, the pressure intensity in the first liquid storage tank can be changed through an external air pump so as to convey the c