Fan motors have been used as thermal cooling for household washing machines, computers and other equipment. These days, they are also used in solar inverters and energy storage for renewable energy and food processing machines in factories. Such applications are exposed not only to water and dust, but also to sea wind and food oil. Against this background, there is growing demand for resistant fan motors that are not only waterproof and dustproof but also resistant to harsher environments, including salt fog, hydrogen sulfide or oil.

Environment resistant fan motors are used in various situations from household washing machines to suburban electricity storage systems. The optimal environmental resistance (ingress protection) level differs depending on usage and use environment, and is determined by where the application is used (indoor or outdoor) and the necessity of environmental resistance to water, dust and other elements. The general classification of Ingress protection/environmental resistance levels and expected applications are as follows:

LEVEL 01(IP22 equivalent): Simple waterproof / Simple dustproof / Condensation resistance

Washing machines, refrigerators, power supplies for dishwashers and factories, inverters

LEVEL 02(IP55): Waterproof / Dustproof

EV fast chargers, EV bike chargers, underfloor ventilation fans, LED lighting, stage lighting

LEVEL 03(IP68): Waterproof / Dustproof / Salt fog / Hydrogen sulfide

Residential solar inverters, residential energy storage, FA, robots, commercial refrigeration

LEVEL 04(IP68/P69K): Waterproof / Dustproof / Salt fog / Hydrogen sulfide / Oil proof

TELECOM, solar inverter, energy storage, food processing machine, heat exchanger

While ingress protection levels of fan motors vary from one manufacturer to another, MinebeaMitsumi has prepared four levels of environment resistant fan motors according to the potting assembly method (coil and circuit board).

Note: Please check the actual mounting status for final water resistance, dust resistance, or oil resistance, as the case may be.

This is a simple type of waterproofing or dustproofing in which insulation or silicon coating is applied to the circuit board. It is available at a reasonable price; however, the environment level is lower than hotmelt coating and potting types.

This is a type of waterproofing or dustproofing in which a stator and circuit board are molded with nylon material. It is used in the S series, which we designed to have low noise in order to be available for a variety of applications. If you need higher cooling performance for industrial applications, the S series make low noise operation possible once the motor meets cooling requirements.

This is a salt fog and hydrogen sulfide-resistant type in which a stator and circuit board are assembled in a casing and filled with epoxy resin. It is recommended that motors be protected with Potting 2 in the harsh condition of level 2 (IP55) or higher in which water and dustproof performance is required.

This type of environmental resistance has advanced environment resistant performance in which epoxy potting is used to completely encase a drive circuit and stator/wiring in epoxy resin. IP69K is resistant to salt fog, hydrogen sulfide and oil as well.

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MinebeaMitsumi has a product lineup of 25 types of environment resistant fan motors which are classified into two series: general use and industrial use.

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