Oil Rig Leg Brake, 1992-2001 Design
... slowly as this would cause the solenoid pullin winding to overheat due to the extended pull-in time. A. AC coils On single voltage coils, connect coil to any two leads on three-phase motors of the same voltage as the brake. Refer to brake nameplate and coil number for correct voltage and frequency. ...
... slowly as this would cause the solenoid pullin winding to overheat due to the extended pull-in time. A. AC coils On single voltage coils, connect coil to any two leads on three-phase motors of the same voltage as the brake. Refer to brake nameplate and coil number for correct voltage and frequency. ...
Installation & Operating Manual
... CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in damage to property. PRECAUTIONS ...
... CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in damage to property. PRECAUTIONS ...
comparison of matrix converter and common converter for induction
... and compact power circuit, generation of load voltage with arbitrary amplitude frequency, regeneration capability, and operation with unity power factor for any load. These ideal characteristics can be fulfilled by matrix converter (MC) which is become increasingly attractive for the AC drive applic ...
... and compact power circuit, generation of load voltage with arbitrary amplitude frequency, regeneration capability, and operation with unity power factor for any load. These ideal characteristics can be fulfilled by matrix converter (MC) which is become increasingly attractive for the AC drive applic ...
SPM Synchronous Motor Protection and Control
... 10.10 EXCITER / FIELD CURRENT METERING TEST 10.10.1 SETUP ............................................................................................................10-10 10.10.2 RELAY PROGRAMMING ...............................................................................10-10 10.10.3 TEST..... ...
... 10.10 EXCITER / FIELD CURRENT METERING TEST 10.10.1 SETUP ............................................................................................................10-10 10.10.2 RELAY PROGRAMMING ...............................................................................10-10 10.10.3 TEST..... ...
Chapter 19 Rotary Transformer Design
... The current-fed sine wave converter requires a resonant, LC, tank circuit to operate properly. The primary of the rotary transformer would be the ideal inductor, because of the inherent gap of the rotary transformer. There are several advantages to incorporating the resonant tank circuit into the ro ...
... The current-fed sine wave converter requires a resonant, LC, tank circuit to operate properly. The primary of the rotary transformer would be the ideal inductor, because of the inherent gap of the rotary transformer. There are several advantages to incorporating the resonant tank circuit into the ro ...
Design Principles of Integrated Magnetic Bearings - ETH E
... possibility to reduce costs is the integration of the control electronics. It is easy to integrate the signal pro¬ cessing electronics with today's integration technology. However the inte¬ gration of the power stages is strongly dependent on the bearing currents. For this they must be minimized. Th ...
... possibility to reduce costs is the integration of the control electronics. It is easy to integrate the signal pro¬ cessing electronics with today's integration technology. However the inte¬ gration of the power stages is strongly dependent on the bearing currents. For this they must be minimized. Th ...
relay problems
... of wire is in series with the run winding of the motor. Internally, normally open relay contacts, wired in series with the start winding, are attached to a vertical armature. Current in the run winding is at its peak when power is first applied to the compressor. Initially, a solenoid effect acts on ...
... of wire is in series with the run winding of the motor. Internally, normally open relay contacts, wired in series with the start winding, are attached to a vertical armature. Current in the run winding is at its peak when power is first applied to the compressor. Initially, a solenoid effect acts on ...
YASKAWA AC Drive A1000
... Read this manual first. This guide is packaged together with the product. It contains basic information required to install and wire the drive, in addition to an overview of fault diagnostics, maintenance, and parameter settings. Use the information in this book to prepare the drive for a trial run ...
... Read this manual first. This guide is packaged together with the product. It contains basic information required to install and wire the drive, in addition to an overview of fault diagnostics, maintenance, and parameter settings. Use the information in this book to prepare the drive for a trial run ...
Energy conversion by permanent magnet machines and novel
... energy stored in the electromechanical coupling field. In this thesis, the energy stored in a permanent magnet system is defined, and the energy-co energy relationship is determined. It is shown how residual magnetism can be incorporated into classical electromechanical coupling theory. It is theref ...
... energy stored in the electromechanical coupling field. In this thesis, the energy stored in a permanent magnet system is defined, and the energy-co energy relationship is determined. It is shown how residual magnetism can be incorporated into classical electromechanical coupling theory. It is theref ...
Fig. 2.12: Simplified equivalent circuit of a transformer at full
... The coil connected to the source is called the primary winding (or primary) and the other one is called the secondary winding (or secondary). A voltage exists only between primary terminals 1-2 and secondary terminals 3-4, respectively. No voltage exists between primary terminal 1 and secondary term ...
... The coil connected to the source is called the primary winding (or primary) and the other one is called the secondary winding (or secondary). A voltage exists only between primary terminals 1-2 and secondary terminals 3-4, respectively. No voltage exists between primary terminal 1 and secondary term ...
L.M. Lorilla, T.A. Keim, J.H. Lang, and D.J. Perreault, “Topologies for Future Automotive Generators – Part I: Modeling and Analytics,” 2005 IEEE Vehicle Power and Propulsion Conference, October 2005, pp. 819-830.
... Research has previously been done on all four alternators. The rotor construction of the wound field nonsalient pole synchronous alternator is more robust than the salient pole version because its field windings are located in the rotor slots. It can therefore be run at higher speeds than the salien ...
... Research has previously been done on all four alternators. The rotor construction of the wound field nonsalient pole synchronous alternator is more robust than the salient pole version because its field windings are located in the rotor slots. It can therefore be run at higher speeds than the salien ...
56- Electromagnetic suspension and levitation
... relieve the load on the pivot bearing, a constant target of magnetic suspension workers (Evershed 1900, Faus 1943, de Ferranti 1947). Further possible applications in the aerospace field are discussed in a General Electric Co. (USA) report (1963). Recent developments in permanent magnets fabricated ...
... relieve the load on the pivot bearing, a constant target of magnetic suspension workers (Evershed 1900, Faus 1943, de Ferranti 1947). Further possible applications in the aerospace field are discussed in a General Electric Co. (USA) report (1963). Recent developments in permanent magnets fabricated ...
Electric Motors and Drives
... century, many different types of motors were developed, and each became closely associated with a particular application. Traction, for example, was seen as the exclusive preserve of the series d.c. motor, whereas the shunt d.c. motor, though outwardly indistinguishable, was seen as being quite unsu ...
... century, many different types of motors were developed, and each became closely associated with a particular application. Traction, for example, was seen as the exclusive preserve of the series d.c. motor, whereas the shunt d.c. motor, though outwardly indistinguishable, was seen as being quite unsu ...
ACS 200 Frequency Converters for Speed Control of 0.55 to 4.0 kW
... Note that the Main Circuit Card of the ACS 200 is at mains supply voltage potential. Warning! The d.c. bus capacitors on the Main Circuit Card contain dangerous d.c. voltages (1.35 ∗ U240, 1.3 ∗ U480). After disconnecting the supply, wait at least five minutes and ensure that the display readout on ...
... Note that the Main Circuit Card of the ACS 200 is at mains supply voltage potential. Warning! The d.c. bus capacitors on the Main Circuit Card contain dangerous d.c. voltages (1.35 ∗ U240, 1.3 ∗ U480). After disconnecting the supply, wait at least five minutes and ensure that the display readout on ...
3-Phase BLDC Motor Control with Sensorless Back EMF Zero
... temperature. Its Hi/Lo level detection capability provides automatic detection of the over/under-voltage, over-current and over temperature protection (serviced in associated ISR). ...
... temperature. Its Hi/Lo level detection capability provides automatic detection of the over/under-voltage, over-current and over temperature protection (serviced in associated ISR). ...
ALTIVAR® 28 AC Drives
... The ATV28 drive controller integrates third-generation sensorless flux vector control for three-phase asynchronous squirrel cage AC motors. This allows the drive controller to deliver needed torque with excellent dynamic response over a wide speed range. ATV28 drive controllers are capable of: • pro ...
... The ATV28 drive controller integrates third-generation sensorless flux vector control for three-phase asynchronous squirrel cage AC motors. This allows the drive controller to deliver needed torque with excellent dynamic response over a wide speed range. ATV28 drive controllers are capable of: • pro ...
11. HOW TO DIAGNOSE THE TROUBLE
... A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take s ...
... A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take s ...
Electric motor
An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with traction motors, electric motors can operate in both motoring and generating or braking modes to also produce electrical energy from mechanical energy.Found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives, electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as from the power grid, inverters or generators. Small motors may be found in electric watches. General-purpose motors with highly standardized dimensions and characteristics provide convenient mechanical power for industrial use. The largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, and so on.Electric motors are used to produce linear or rotary force (torque), and should be distinguished from devices such as magnetic solenoids and loudspeakers that convert electricity into motion but do not generate usable mechanical powers, which are respectively referred to as actuators and transducers.