CONTROL DEVICE FOR CONTROLLING THE POWER SUPPLY TO AN OSCILLATING MOTOR FOR DRIVING A COMPRESSOR UNIT OF THE RESONANT-PISTON TYPE AND COMPRESSOR UNIT OF THE RESONANT-PISTON TYPE PROVIDED WITH SUCH A CONTROL DEVICE

• Main Authors: VAN HERK, JOHANNES JOHANNA, HEYMANS, PETER MICHEL SILVESTER MARIA, LISSENBURG, ROKUS CORNELIS DIRK, BOON, FIDELUS ADRIANUS
• Format: Patent
• Language: English
• Published: 01.04.1992
• Subjects: BLASTING; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; WEAPONS

A control device (30) is disclosed for controlling the power supply to the coils (16A, 16B) of a drive motor (3) for a compressor unit of the resonant-piston type (1). The control device comprises a power-supply circuit (44) for energising the motor coils (16A, 16B) from a direct voltage source (45), means (46, 47, 48; 46, 60) for determining a measure (P, phi ), which indicate whether the power consumption of the motor as a function of the frequency of the energising current is at least approximately maximal, and means (40, 42, 43; 61, 42, 43) for adjusting the frequency of the energising current depending on the derived measure (P, phi ) to a value for which said measure (P, phi ) indicates that the power consumption of the motor (3) is maximal.