Module 1_Basic Electrical Concepts
... • Kirchhoff’s Current Law (KCL): KCL states that at any node (junction) in a circuit the algebraic sum of currents entering and leaving a node at any instant of time must be equal to zero. Here currents entering and currents leaving the node must be assigned opposite algebraic signs . • Kirchhoff’s ...
... • Kirchhoff’s Current Law (KCL): KCL states that at any node (junction) in a circuit the algebraic sum of currents entering and leaving a node at any instant of time must be equal to zero. Here currents entering and currents leaving the node must be assigned opposite algebraic signs . • Kirchhoff’s ...
SCIENTIFIC PAPERS OF THE UNIVERSITY OF PARDUBICE UTILIZATION OF INDUCTION-MACHINE MATHEMATICAL MODEL
... methods: either from the stator currents and voltages (so-called voltage model) or from the stator currents and rotor mechanical speed (so-called current model). The starting point for creating the program is the current model. The choice of the current model is mostly given by the fact that the vol ...
... methods: either from the stator currents and voltages (so-called voltage model) or from the stator currents and rotor mechanical speed (so-called current model). The starting point for creating the program is the current model. The choice of the current model is mostly given by the fact that the vol ...
Magnetic field sensor Magnetic field sensor
... the Sensor to the field direction, it can be useful to: a. Fix either or both the source and the Sensor in one position. b. Use a non-magnetic ruler or metre rule as a guide to move the Sensor. c. Use a non-magnetic clamp and stand to secure the Sensor so it is kept facing at the same angle and in t ...
... the Sensor to the field direction, it can be useful to: a. Fix either or both the source and the Sensor in one position. b. Use a non-magnetic ruler or metre rule as a guide to move the Sensor. c. Use a non-magnetic clamp and stand to secure the Sensor so it is kept facing at the same angle and in t ...
EX-503put - Corporate Group of Institutes
... the alternator is 375 rpm. Calculate: EMF induced per phase . The resultant flux in the air gap is 0.05Wb per pole . Assume the coil span as 150 electrical degree. Q.8 A 3-phase ,1500KVA, star –connected,50Hz, 2300V alternator has a resistance between each pair of terminals as measured by direct cur ...
... the alternator is 375 rpm. Calculate: EMF induced per phase . The resultant flux in the air gap is 0.05Wb per pole . Assume the coil span as 150 electrical degree. Q.8 A 3-phase ,1500KVA, star –connected,50Hz, 2300V alternator has a resistance between each pair of terminals as measured by direct cur ...
The creation of a rotating stator field using three-phase power
... and its frequency will drop. When the rotor revolves at the same speed and in the same direction as the rotating stator field, the induced voltage as well as its frequency will drop to zero.(the rotor is now at synchronous speed). Conversely, if the rotor is driven at synchronous speed, but in the o ...
... and its frequency will drop. When the rotor revolves at the same speed and in the same direction as the rotating stator field, the induced voltage as well as its frequency will drop to zero.(the rotor is now at synchronous speed). Conversely, if the rotor is driven at synchronous speed, but in the o ...
Guitar Pickup Theory
... 1. Install new pickups. This method is most common, but also the most expensive. 2. Change the coil configuration of the built in pickups. This is possible with nearly all humbucking pickups. Normally, both coils are switched in series. Switching them in parallel cuts the inductance to a quarter of ...
... 1. Install new pickups. This method is most common, but also the most expensive. 2. Change the coil configuration of the built in pickups. This is possible with nearly all humbucking pickups. Normally, both coils are switched in series. Switching them in parallel cuts the inductance to a quarter of ...
NCEA Level 3 Physics (90523) 2012 Assessment Schedule
... same, but the gradient is steeper. The EMF of the cell will remain the same over time but the internal resistance of the cell will increase (as the products of the reaction in the cells build up). ...
... same, but the gradient is steeper. The EMF of the cell will remain the same over time but the internal resistance of the cell will increase (as the products of the reaction in the cells build up). ...
262900 - Low Medium Voltage Motor Controlers
... incorporate circuit breaker disconnect switch and a magnetic starter into a common enclosure. ...
... incorporate circuit breaker disconnect switch and a magnetic starter into a common enclosure. ...
Franck-Hertz Experiment - NUS Physics Department
... highest current measurement range on the amplifier. Therefore, when the discharge occurs, the acceleration voltage should be immediately reduced until the discharge disappears. If Franck-Hertz Control Unit is used then the tube power supply is switched off automatically after 7 sec to avoid the disc ...
... highest current measurement range on the amplifier. Therefore, when the discharge occurs, the acceleration voltage should be immediately reduced until the discharge disappears. If Franck-Hertz Control Unit is used then the tube power supply is switched off automatically after 7 sec to avoid the disc ...
Compensation of Negative Sequence Components in an Induction
... KCL equation, in terms of change in flux linkage, to every such L-i cut set and also the principle of conservation of flux linkages. From this the change in flux linkage in each inductor can be determined and hence the initial conditions. ...
... KCL equation, in terms of change in flux linkage, to every such L-i cut set and also the principle of conservation of flux linkages. From this the change in flux linkage in each inductor can be determined and hence the initial conditions. ...
Document
... A comprehensive range of types and sizes of Search Coils are available for use with this Detector. All the Coils are housed in a fiberglass housing which is robust as well as being light and relatively easy to keep clean. There are two basic types of Search Coils, these being the Standard Coil, prim ...
... A comprehensive range of types and sizes of Search Coils are available for use with this Detector. All the Coils are housed in a fiberglass housing which is robust as well as being light and relatively easy to keep clean. There are two basic types of Search Coils, these being the Standard Coil, prim ...
Chapter 29 Alternating Currents and Power Transmission
... • For a step-up transformer, Ns > Np, and so Vs > Vp. • For a step-down transformer, Ns < Np, and so Vs < Vp. ...
... • For a step-up transformer, Ns > Np, and so Vs > Vp. • For a step-down transformer, Ns < Np, and so Vs < Vp. ...
PART 1 – GENERAL - Hammond Power Solutions
... from 35% to 65% of rated linear load. ii There is no energy efficiency standard for non-linear load profiles. This product line even at a non linear load profile of K20 at an operating range from 35% to 65% of rated load will exceed levels efficiency levels defined (where applicable) in accordance w ...
... from 35% to 65% of rated linear load. ii There is no energy efficiency standard for non-linear load profiles. This product line even at a non linear load profile of K20 at an operating range from 35% to 65% of rated load will exceed levels efficiency levels defined (where applicable) in accordance w ...
Part Three
... Energy eqn: note this is written with the source term (right side) as the negative of the output defined on the last page. What does the source term do to the enthalpy of the flow along X? ...
... Energy eqn: note this is written with the source term (right side) as the negative of the output defined on the last page. What does the source term do to the enthalpy of the flow along X? ...
How to restore your Tube radio
... to the lead wires of the new parts. Cut out the original part near the body. Slip the new part’s coils over the old lead wires and solder. This maintains the original component position and makes for a quick secure solder joint. ...
... to the lead wires of the new parts. Cut out the original part near the body. Slip the new part’s coils over the old lead wires and solder. This maintains the original component position and makes for a quick secure solder joint. ...
PMMC
... the movable coil also. When the torques are balanced the moving coil will stopped and its angular deflection represent the amount of electrical current to be measured against a fixed reference, called a scale. If the permanent magnet field is uniform and the spring linear, then the pointer deflectio ...
... the movable coil also. When the torques are balanced the moving coil will stopped and its angular deflection represent the amount of electrical current to be measured against a fixed reference, called a scale. If the permanent magnet field is uniform and the spring linear, then the pointer deflectio ...
Coilgun
A coilgun (or Gauss rifle, in reference to Carl Friedrich Gauss, who formulated mathematical descriptions of the magnetic effect used by magnetic accelerators) is a type of projectile accelerator consisting of one or more coils used as electromagnets in the configuration of a linear motor that accelerate a ferromagnetic or conducting projectile to high velocity. In almost all coilgun configurations, the coils and the gun barrel are arranged on a common axis.Coilguns generally consist of one or more coils arranged along a barrel, so the path of the accelerating projectile lies along the central axis of the coils. The coils are switched on and off in a precisely timed sequence, causing the projectile to be accelerated quickly along the barrel via magnetic forces. Coilguns are distinct from railguns, as the direction of acceleration in a railgun is at right angles to the central axis of the current loop formed by the conducting rails. In addition, railguns usually require the use of sliding contacts to pass a large current through the projectile or sabot but coilguns do not necessarily require sliding contacts. Whilst some simple coilgun concepts can use ferromagnetic projectiles or even permanent magnet projectiles, most designs for high velocities actually incorporate a coupled coil as part of the projectile.