ELECTRICAL VARIABLE SPEED MOTOR CONTROLS

Brand	Owner (click to sort)	Address	Description
RATIOTROL	Boston Gear	701 Carrier Drive Charlotte NC 28216	Electrical Variable Speed Motor Controls;
RATIOTROL	MURRAY COMPANY OF TEXAS, INC., THE	14 HAYWARD ST. NORTH QUINCY MA	ELECTRICAL VARIABLE SPEED MOTOR CONTROLS;
STANDARDIZATION PAYS	MURRAY COMPANY OF TEXAS, INC., THE	14 HAYWARD ST. NORTH QUINCY MA	ELECTRICAL VARIABLE SPEED MOTOR CONTROLS;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The compressor in a refrigeration system is controlled solely by a variable speed drive which controls the motor of the compressor by virtue of the varying of the frequency of the electricity provided to the motor. To minimize the initial cost and to minimize operating costs, the variable speed drive is cooled by refrigerant from the refrigeration system which permits the use of a smaller drive, and the variable speed drive is operated at, or approaching, a unity power factor.