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These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
Elektrobau Mulfingen GmbH is the parent company of the ebm-papst Group, a manufacturer of electric motors and fans.The group was formed in 2003 from the merger of the companies Elektrobau Mulfingen GmbH & Co. KG (ebm), Papst Motoren GmbH and Motoren Ventilatoren Landshut GmbH and operates international production sites (including in Germany, China and the United States).
On modern vehicles, further regulation of cooling rate is provided by either variable speed or cycling radiator fans. Electric fans are controlled by a thermostatic switch or the engine control unit. Electric fans also have the advantage of giving good airflow and cooling at low engine revs or when stationary, such as in slow-moving traffic.
It is a specialist for automotive air conditioning and engine cooling systems. In 2006 group sales was €3.2 billion and it employed 18,600 staff. [1] Mahle Behr has major U.S. operations in Troy, Michigan, Dayton, Ohio (Behr Dayton Thermal Products), Charleston, South Carolina, Fort Worth, Texas. [2]
An internal fan-cooled electric motor (colloquially, fan-cooled motor) is a self cooling electric motor.Fan cooled motors feature an axial fan attached to the rotor of the motor (usually on the opposite end as the output shaft) that spins with the motor, providing increased airflow to the motor's internal and external parts which aids in cooling.
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Engine fan with viscous drive. A fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine.
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