Abstract:
The present subject matter discusses about the electric machine and core saturation sensing setup, and the method of detecting the core saturation. The present subject matter proposes that an auxiliary winding with at least one tooth is wound around at least one of the stator tooth along any one phase of the phases of the machine. The ends of the wire are given to the signal conditioning circuit which filters the signal from noises. The filtered signal is given to an ADC (analog to digital converter) pin of the controller to digitalize the signal value.
Abstract:
A subsea pump assembly (11) includes a tubular conduit (13) that has an upstream end plate (15) and an inlet (21) for flowing well fluid into an interior of the conduit. A power cable opening (25) extends through the upstream end plate. An electrical submersible pump (39) and motor (35) are in the interior of the conduit. The motor has a motor assembly housing (51) with an upstream end having an electrical insulator opening (60). An end connection (63) secures the upstream end to an interior side of the upstream end plate with the insulator opening registering with the power cable opening. An insulated electrical connector (67) is mounted in the insulator opening. A motor wire (57) in the motor assembly housing joins to an inner end of the electrical connector. A power conductor (31) extends from exterior of the conduit through the power cable opening and joins to an outer end of the electrical connector.
Abstract:
Die Erfindung betrifft eine permanenterregte Synchronmaschine (1), umfassend einen Rotor (3) sowie einen Stator (2) zur Aufnahme wenigstens einer ersten Statorwicklung (SW1) und einer von dieser ersten Statorwicklung (SW1) elektrisch isolierten zweiten Statorwicklung (SW2), die sich dadurch auszeichnet, dass die zweite Statorwicklung (SW1) einen geringeren Leiterquerschnitt und eine größere Wicklungszahl als die erste Statorwicklung (SW2) aufweist, wobei die erste Statorwicklung (SW1) für den Motorbetrieb mit einer ersten Betriebsspannung (U1) und die zweite Statorwicklung (SW2) für den Motorbetrieb an einer zweiten Betriebsspannung (U2) mit höherer Nennspannung als einer Nennspannung der ersten Betriebsspannung (U1) vorgesehen ist.
Abstract:
An electric motor is provided. A rotor sensor mechanism is operable to sense a condition of the rotor. The rotor sensor mechanism includes a target component, a radial sensor, and a sensor carrier. The target component comprises a shutter wheel fixed relative to the rotor for rotational movement therewith. The shutter wheel includes a plurality of circumferentially spaced, radially projecting radial target teeth. The radial sensor is configured to sense the target teeth. The radial sensor is at least generally axially aligned with the radial target teeth and faces radially toward the radial target teeth. The sensor carrier adjustably supports the radial sensor on the motor frame assembly so as to permit the radial sensor to be selectively positioned relative to the radial target teeth.
Abstract:
A method according to an exemplary aspect of this disclosure includes, among other things, electrically diagnosing a failure of a brushless DC motor of a surgical device.
Abstract:
A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.
Abstract:
A connection unit is disclosed for connecting windings in the stator of a rotating electrical machine. The connection unit (40) has a body formed from an electrically insulating material, the body holding a plurality of electrically conductive rings (42) each of which is arranged to connect to a stator winding. The stator windings comprise coils, and each of the conductive rings comprises a terminal for connecting an end wire (38) of one coil and a start wire (36) of an adjacent coil to the conductive ring and to each other. This can facilitate assembly of the machine.