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The electric motor drying oven (also known as motor oven, motor coil winding oven, motor insulation varnish curing oven, motor oven) is widely used for motor varnishing, transformer varnishing, resin hardening, enameled wire curing, and motor rotor drying.
The electric motor drying oven consists of a chamber, heating system, electrical control system, air circulation system, protection system, pressure relief door, and material rack cart.
The electric heated air circulation electric motor drying oven's air circulation system adopts a fan-driven air circulation method, which is efficient and uniform. The air source is driven by the circulating fan motor (using a contactless switch) which drives the impeller through the heater, and the hot air is sent out, then it passes through the air duct into the inner chamber of the oven, and then the used air is drawn into the air duct to become the air source for circulation and heating again. This ensures the uniformity of the internal temperature. The PID intelligent temperature control, SSR solid-state relay, over-temperature protection, and phase sequence protection are applied.
It is suitable for motor maintenance, insulation varnish curing, coil winding drying, stator insulation varnish drying, motor rotor coil drying, motor casing powder coating curing, transformer curing, etc.
The significance of using the electric motor drying oven, and motor maintenance oven in industrial production:
In the windings, whether it's slot insulation, inter-layer insulation, phase-to-phase insulation, binding wire, and the outer layer of the power lead, there are many capillary pores which easily absorb moisture from the air, reducing their insulation performance. After varnishing and drying, the moisture in the capillary pores is expelled, filled with insulation varnish, and forms a smooth varnish film, preventing the entry of moisture and corrosive gases, thereby enhancing the moisture resistance and corrosion resistance of the windings.
Windings that have undergone varnishing and drying treatment are filled with dielectric-performance insulation varnish between turns, coils, phases, and various insulation materials, increasing the insulation strength significantly compared to before varnishing.
The operating temperature rise of a motor directly affects its service life. The heat from the windings is conducted to the heat sinks through the slot insulation. Before varnishing, the large gaps between the insulation paper of the wires are filled with insulating air, hindering heat conduction. After varnishing and curing, these gaps are filled with insulation varnish, which has much better thermal conductivity than air, thereby greatly improving the heat dissipation conditions of the windings.
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