Vacuum desorption, impregnation and curing system, vacuum desorption device, and vacuum desorption process for protective layer of magnetic pole

A vacuum desorption device for a protective layer of a magnetic pole, wherein a magnetic yoke and a vacuum bag form a sealed system, and wherein the vacuum desorption device comprises:

• a controller;
• a vacuum pump configured to perform vacuum desorption on the sealed system, and
• a heating device and/or an ultrasonic device,
• wherein the controller is pre-stored with a functional relationship about a vacuum degree or pressure in the sealed system to control a procedure of the vacuum desorption, and parameters in the functional relationship comprise an average suctioned gas volume flow of the vacuum pump, duration of vacuumization, an initial pressure in the sealed system and an initial volume of the sealed system,
• wherein the heating device and/or the ultrasonic device is configured to perform a heating desorption treatment on the sealed system, and the heating device is at least one of a microwave heating device, a far-infrared heat source and an electric heating film, the electric heating film is laid at a wall surface of the magnetic yoke, and a heat insulation layer is laid in addition to the electric heating film at the wall surface of the magnetic yoke,
• a densimeter configured to detect an initial density and a current density, and
• wherein an expansion procedure of gas suctioned out by vacuumization is a variable temperature procedure, and the parameters in the functional relation further comprise a polytropic index of a thermodynamic polytropic procedure.