Glossary of Terms

Flow of air is parallel to shaft and perpendicular to blades.

Part of the motor that rides on the commutator that changes (+) and (-) fields within the armature to interact with the field ring.

The steel housing that holds all the magnetic parts of the motor.

Heat exchanger in an AC system that flows the gas refrigerant that has been heated after the evaporator back into a liquid before being compressed in the AC compressor.

Manufacturer’s self declaration that a product sold meets requirements of European Directives regarding safety, health, environment, and consumer protection.

A measurement of airflow used for fans and blowers.

A small Axial Fan mounted to a vehicle Dashboard or Ceiling. Also known as a defog or defrost fan.

Logarithmic unit to express the ratio between two values of a physical quantity. Pressure or intensity doubles with each 3 db increase. Used primarily for sound and EMI or RFI.

The unidirectional flow of electric charge.

Rotary electrical motors that converts direct current electrical energy into mechanical energy.

Heat exchanger in an AC system that flows compressed liquefied refrigerant through its core producing very cold temperatures changing the refrigerant back to gas.

Hose that can be easily bent.

Component of Heaters which allows Heat from water to be transferred to air by an Axial Fan or Centrifugal Blower.

Rating is used to specify the environmental protection - electrical enclosure - of electrical equipment, e.g., IP68: IP = Ingress Protection, 6 = completely dust proof, and 8 = water tight to 1 meter for a period longer than 30 minutes (cold motor 1 hour submersion).

Process of testing a product by subjecting it to conditions (stress, strain, temperatures, voltage, vibration rate, pressure etc.) to obtain the approximate wear out life.

Term used to describe airflow where air is pulled towards the motor.

Term used to describe airflow where air is pushed away from the motor.

Electronic speed control device which drops the input voltage causing the motor to run at lower speeds. Single or a series can be used.

Resistance to flow.

Unit is protected against overheating by a thermal fuse.

Unit for electrical potential - Products typically identified as 12V or 24V Direct Current (DC). Could also be 120V or 240V Alternating Current (AC).

Unit for Power consumption.