There are two available varnish processes for electric motors: Dip and Bake immerses a motor into a tank of varnish. Vacuum Pressure Impregnation (or VPI) is a process that places the motor into a chamber with a controlled atmosphere. The dip and bake method develops a hydro static pressure that dissipates many air voids and […]
Vacuum pressure impregnation enhances the life of electrical motor windings
Vacuum pressure impregnation, known as VPI, is a varnish process for electric motor insulation. The several-hour process begins with a prebake cycle to remove any moisture, the component is placed into the varnish chamber, a vacuum is pulled to remove air, varnish is introduced and the varnish chamber is pressurized. Computerized capacitance monitoring insures a […]
Motor rewinds with dip and bake are cost effective measures
The rewind of an industrial electric motor can often be an effective cost measure for a customer. When excessive heat causes damage or failure of a motor’s insulation system, there is no need to run out and buy a new motor. Motor rewinding gets the motor back in good working order without the high cost […]
What is VPI? What is dip and bake?
These two terms are often used in the motor repair industry to describe a type of insulation finishing process used on rewound electric motors. When a motor is rewound, it must be processed in some type of varnish in order to hold the windings together. This varnish, also known as resin, helps to bond the […]