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Difficulties in Matching Fan EC Motors in HVAC Systems

2020-01-14 17:35:31 Volcano Motor Read

Fan EC Motor Permanent Magnet Synchronous Motor Selection Focus Part Fourteen---Difficulties in Matching Fan EC Motors in HVAC Systems

HVAC Systems.jpg

HVAC is the abbreviation of heating, ventilation and air conditioning, which is the heating, ventilation and air conditioning system. Air conditioning supplies cold air, warm air or dehumidification in a similar principle. Refrigerant evaporates or condenses under the action of a compressor, thus causing evaporation or condensation of ambient air to achieve the purpose of changing temperature and humidity. Air conditioning is a control system that includes temperature, humidity, air cleanliness and air circulation. This is similar to the working principle of air conditioner/air conditioner in supplying cold air, heating or dehumidification. Most of the refrigerant evaporates or condenses under the action of compressor, thus causing the evaporation or condensation of ambient air to achieve the purpose of changing temperature and humidity.


HVAC system fans are widely used, mainly in HVAC, air purification, traffic vehicles and communication systems.

The first difficulty in matching the EC motor of HVAC system fan is that the equipment space is small. Fans are mostly used as equipment accessories in HVAC systems. Both fan performance and installation space require EC motors to be as small as possible. If the motor volume is too large, the cross-sectional area to be overcome by fluid flow will be increased, the static pressure of the fan will be increased, and the air volume will be lost. Excessive motor volume will also affect the host volume. Modern buildings with every inch of land and every inch of gold have very strict requirements on the host volume of HVAC system.


The second difficulty in matching the EC motor of HVAC system fan is the complex environment. Most HVAC system mainframes are installed outdoors in a high temperature and humidity environment. Special applications may also contain chemical components. Electronic components are sensitive to these factors. The complex environment requires that the protective capability of EC motor should not be set too low.


The third difficulty in matching the EC motor of HVAC system fan is high exhaust temperature. In the main engine refrigeration mode of HCAC system, the high-temperature and high-pressure gas discharged from the compressor enters the fin condenser through the four-way reversing valve to release heat, and the outlet temperature of the condenser is 40-90℃. Affected by the ambient temperature, it is very important to control the temperature rise of the motor to ensure the smooth and safe operation of the HVAC system fan.

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