Techforum Newsletter August 2011
... in 1983, the insulated-gate bipolar transistor (IGBT) has in the past two decades come to dominate VFDs as an inverter switching device. In variable-torque applications suited for Volts per Hertz (V/Hz) drive control, AC motor characteristics require that the voltage magnitude of the inverter's out ...
... in 1983, the insulated-gate bipolar transistor (IGBT) has in the past two decades come to dominate VFDs as an inverter switching device. In variable-torque applications suited for Volts per Hertz (V/Hz) drive control, AC motor characteristics require that the voltage magnitude of the inverter's out ...
section 15170-motors - DeCA Facilities Website
... Explosion-Proof Motors: UL approved and labeled for hazard classification, with over temperature protection. ...
... Explosion-Proof Motors: UL approved and labeled for hazard classification, with over temperature protection. ...
Identifying Motor Defects Through Fault Zone Analysis
... although a small percentage of the motor problems, can influence other fault zones to fail. When a motor is started with a broken or cracked rotor bar, intense heat is generated around the vicinity of the break. This can spread to other rotor bars and destroy the insulation around the nearby laminat ...
... although a small percentage of the motor problems, can influence other fault zones to fail. When a motor is started with a broken or cracked rotor bar, intense heat is generated around the vicinity of the break. This can spread to other rotor bars and destroy the insulation around the nearby laminat ...
PMG Excitation
... Drilling rigs may be described as mechanical or electric. These terms refer to the method in which power is supplied to the larger equipment on the rig. On mechanical rigs, power from the engines drives the rig equipment either directly, through a clutch or through a torque converter. ...
... Drilling rigs may be described as mechanical or electric. These terms refer to the method in which power is supplied to the larger equipment on the rig. On mechanical rigs, power from the engines drives the rig equipment either directly, through a clutch or through a torque converter. ...
Synchronous Generator.
... Machines with cylindrical rotors are typically found in higher speed higher power applications such as turbogenerators. Using 2 or 4 poles, these machines rotate at 3600 or 1800 rpm (with 60hz systems). Salient pole machines are typically found in large (many MW), low mechanical speed applicatio ...
... Machines with cylindrical rotors are typically found in higher speed higher power applications such as turbogenerators. Using 2 or 4 poles, these machines rotate at 3600 or 1800 rpm (with 60hz systems). Salient pole machines are typically found in large (many MW), low mechanical speed applicatio ...
the manual - OpenBuilds Part Store
... DQ542MA is a type of two-phase hybrid stepping motor driver, The drive voltage of which is from 18VDC to 50VDC. It is designed for use with 2-phase hybrid stepper motor of all kinds with 42mm to 86mm outside diameter and less than 4.0A phase current. This circuit that it adopts is similar to the cir ...
... DQ542MA is a type of two-phase hybrid stepping motor driver, The drive voltage of which is from 18VDC to 50VDC. It is designed for use with 2-phase hybrid stepper motor of all kinds with 42mm to 86mm outside diameter and less than 4.0A phase current. This circuit that it adopts is similar to the cir ...
Theoretical developments
... The popular back-emf (back electromotive force) method can only be used in high speeds and needs another initial rotor position detection method and a start-up algorithm The ‘align and go’ start-up algorithm can be used, but it usually incurs a time delay due to aligning the rotor and reaching a ...
... The popular back-emf (back electromotive force) method can only be used in high speeds and needs another initial rotor position detection method and a start-up algorithm The ‘align and go’ start-up algorithm can be used, but it usually incurs a time delay due to aligning the rotor and reaching a ...
MOH Goat Autonomous Operation
... Design Details Cont. • If holding a lifter/arm in position is important do not rely upon motor torque (overheating) Design aexample: mechanical one-way clutch/ • Previous ~30W to hold @ 1.0 in retractable ratchet or @ balance drum; ~180W to hold 2.75 inmechanism drum! ...
... Design Details Cont. • If holding a lifter/arm in position is important do not rely upon motor torque (overheating) Design aexample: mechanical one-way clutch/ • Previous ~30W to hold @ 1.0 in retractable ratchet or @ balance drum; ~180W to hold 2.75 inmechanism drum! ...
AVR496: Brushless DC Motor Control using
... Brushless DC motors are used in a growing number of motor applications as they have many advantages: They have no brushes so they require little or no maintenance. They generate less acoustic and electrical noise than universal brushed DC motors. They can be used in hazardous operation environments ...
... Brushless DC motors are used in a growing number of motor applications as they have many advantages: They have no brushes so they require little or no maintenance. They generate less acoustic and electrical noise than universal brushed DC motors. They can be used in hazardous operation environments ...
Technical Information CR EB4 N Motor Controller
... The Climate Ready® EB4 N is a quad motor controller that operates facade element/s for eg. shading systems, ventilation systems and other motorised systems. Included is a basic software package the Horiso Smart Motor Control that provides safety soft limits (prevents damage if motor limits fail). Pr ...
... The Climate Ready® EB4 N is a quad motor controller that operates facade element/s for eg. shading systems, ventilation systems and other motorised systems. Included is a basic software package the Horiso Smart Motor Control that provides safety soft limits (prevents damage if motor limits fail). Pr ...
Winding Failures of Electrical Motors
... in the stator winding due to locked rotor. This can also occur due to excessive starts and reversions. ...
... in the stator winding due to locked rotor. This can also occur due to excessive starts and reversions. ...
Induction Motors
... •In Figure a larger capacitor may be used to start a single phase induction motor via the auxiliary winding if it is switched out by a centrifugal switch once the motor is up to speed. Moreover, the auxiliary winding may be many more turns of heavier wire than used in a resistance split-phase motor ...
... •In Figure a larger capacitor may be used to start a single phase induction motor via the auxiliary winding if it is switched out by a centrifugal switch once the motor is up to speed. Moreover, the auxiliary winding may be many more turns of heavier wire than used in a resistance split-phase motor ...
Motor Control and Power Supply Design Using BLDC, PMSM
... Another area where energy-saving advances are being ...
... Another area where energy-saving advances are being ...
ENG H191 Hands-on Lab Lab 7: Motors Introduction
... A simple DC motor has a wound rotor and a permanent magnet stator. This means that the rotating portion of the motor (the rotor) has the wound coils, which produce magnetic fields. The outside of the motor contains a magnet, which attracts and repels the windings to cause rotation. The poles of the ...
... A simple DC motor has a wound rotor and a permanent magnet stator. This means that the rotating portion of the motor (the rotor) has the wound coils, which produce magnetic fields. The outside of the motor contains a magnet, which attracts and repels the windings to cause rotation. The poles of the ...
Final Control Element
... motors are stepper motors, where an internal rotor containing permanent magnets or a large iron core with salient poles is controlled by a set of external magnets that are switched electronically. A stepper motor may also be thought of as a cross between a DC electric motor and a solenoid. As each c ...
... motors are stepper motors, where an internal rotor containing permanent magnets or a large iron core with salient poles is controlled by a set of external magnets that are switched electronically. A stepper motor may also be thought of as a cross between a DC electric motor and a solenoid. As each c ...
AC motor
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.Less commonly, linear AC motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation.