ELECTRICAL CONTROLS FOR AUTOMATICALLY CONTROLLING

Brand	Owner	Address	Description
TRAV-START	HARNISCHFEGER CORPORATION	MILWAUKEE, WIS.	ELECTRICAL CONTROLS FOR AUTOMATICALLY CONTROLLING THE MOTOR TORQUE AND ACCELERATION FOR THE BRIDGE AND TROLLEY MOTIONS OF CRANES;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A system for controlling a commutation of a load current is provided. The system comprises a AC-to-AC converter that includes a plurality of switching elements, an energy source that provides an oscillating voltage and is connected to the converter, an electrical load connected to the converter, and a controller that controls the converter, and monitors the oscillating voltage and the load current delivered to the electrical load. The controller determines a plurality of machine states of the converter, each of the plurality of machine states representing a corresponding conducting set of the plurality of switching elements, and controls switching between the plurality of machine states based on polarity commutations of the load current in the electrical load and polarity commutations of the oscillating voltage.