Activity 3A
... armature pulls in. The air has quite a bit more reluctance than the iron circuit and eliminating it means that less mmf is required to overcome the spring tension. The switch logic circuit application in relay ( Figure 3.6( c ) shows a relay with two NO contacts). One contact is used as an interlock ...
... armature pulls in. The air has quite a bit more reluctance than the iron circuit and eliminating it means that less mmf is required to overcome the spring tension. The switch logic circuit application in relay ( Figure 3.6( c ) shows a relay with two NO contacts). One contact is used as an interlock ...
Advantages of Solid-State Relays Over Electro
... advantages of solid-state relays include the following: • SSRs are typically smaller than EMRs, conserving valuable real estate in printed-circuit board applications • SSRs offer improved system reliability because they have no moving parts or contacts to degrade • SSRs provide state-of-the-art perf ...
... advantages of solid-state relays include the following: • SSRs are typically smaller than EMRs, conserving valuable real estate in printed-circuit board applications • SSRs offer improved system reliability because they have no moving parts or contacts to degrade • SSRs provide state-of-the-art perf ...
Lessons Learned From Generator Event Reports
... equipment on the system, they are also extremely critical to power system stability. A false trip can lead to extensive testing in search of a nonexistent fault, while a delayed trip can result in unnecessary additional damage to equipment. Both misoperations result in excessive equipment outages, i ...
... equipment on the system, they are also extremely critical to power system stability. A false trip can lead to extensive testing in search of a nonexistent fault, while a delayed trip can result in unnecessary additional damage to equipment. Both misoperations result in excessive equipment outages, i ...
Resistive displacement sensors
... V1=k1sin(ωt) and V2=k2sin(ωt) k1 and k2 depend on the amount of coupling between the primary and the secondary coils, which is proportional to the position of the coil. When the coil is in the central position, k1=k2 ⇒ VOUT=V1-V2=0 When the coil is is displaced x units, k1≠k2 ⇒ VOUT=(k1-k2)sin(ωt) P ...
... V1=k1sin(ωt) and V2=k2sin(ωt) k1 and k2 depend on the amount of coupling between the primary and the secondary coils, which is proportional to the position of the coil. When the coil is in the central position, k1=k2 ⇒ VOUT=V1-V2=0 When the coil is is displaced x units, k1≠k2 ⇒ VOUT=(k1-k2)sin(ωt) P ...
deg
... Toothed Animation • Note teeth are not phased with “dentures” all the way around – each is 90° from neighbor ...
... Toothed Animation • Note teeth are not phased with “dentures” all the way around – each is 90° from neighbor ...
Mitigation and Analysis of Very Fast Transient over
... Over-voltages (VFTOs) are caused by two ways: 1. Due to switching operations and 2. Line to enclosure faults. The switching operations may be disconnector switch, circuit breaker or earth switch. Since, the contact speed of disconnector switches are low, restriking occurs many times before the inter ...
... Over-voltages (VFTOs) are caused by two ways: 1. Due to switching operations and 2. Line to enclosure faults. The switching operations may be disconnector switch, circuit breaker or earth switch. Since, the contact speed of disconnector switches are low, restriking occurs many times before the inter ...
Oscillator
... Build-up of steady- state oscillations The unity gain condition must be met for oscillation to be sustained In practice, for oscillation to begin, the voltage gain around the positive feedback loop must be greater than 1 so that the amplitude of the output can build up to the desired value. Bui ...
... Build-up of steady- state oscillations The unity gain condition must be met for oscillation to be sustained In practice, for oscillation to begin, the voltage gain around the positive feedback loop must be greater than 1 so that the amplitude of the output can build up to the desired value. Bui ...
Introduction For Coil gun
... Conclusions Notice the sharp knee around 20 to 30 volts. Then only 10% gain is achieved when the voltage is doubled to 60 volts. A reasonable tuning strategy is to gradually increase the voltage until this knee is identified. Further voltage increases will stress the circuitry without providing sign ...
... Conclusions Notice the sharp knee around 20 to 30 volts. Then only 10% gain is achieved when the voltage is doubled to 60 volts. A reasonable tuning strategy is to gradually increase the voltage until this knee is identified. Further voltage increases will stress the circuitry without providing sign ...
POWER ENGINEERING GUIDE - Edition 7.0
... three cornerstones of product, people and process quality (fig. 5.2-1). The objective is to achieve the greatest customer satisfaction with cost-efficient processes. This is only possible if all employees are involved in the processes have a profound understanding of the customer needs and specific req ...
... three cornerstones of product, people and process quality (fig. 5.2-1). The objective is to achieve the greatest customer satisfaction with cost-efficient processes. This is only possible if all employees are involved in the processes have a profound understanding of the customer needs and specific req ...
Resonant inductive coupling
Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two magnetically coupled coils that are part of resonant circuits tuned to resonate at the same frequency. This process occurs in a resonant transformer, an electrical component which consists of two high Q coils wound on the same core with capacitors connected across the windings to make two coupled LC circuits. Resonant transformers are widely used in radio circuits as bandpass filters, and in switching power supplies. Resonant inductive coupling is also being used in wireless power systems. Here the two LC circuits are in different devices; a transmitter coil in one device transmits electric power across an intervening space to a resonant receiver coil in another device. This technology is being developed for powering and charging portable devices such as cellphones and tablet computers at a distance, without being tethered to an outlet.Resonant transfer works by making a coil ring with an oscillating current. This generates an oscillating magnetic field. Because the coil is highly resonant, any energy placed in the coil dies away relatively slowly over very many cycles; but if a second coil is brought near it, the coil can pick up most of the energy before it is lost, even if it is some distance away. The fields used are predominately non-radiative, near fields (sometimes called evanescent waves), as all hardware is kept well within the 1/4 wavelength distance they radiate little energy from the transmitter to infinity.One of the applications of the resonant transformer is for the CCFL inverter. Another application of the resonant transformer is to couple between stages of a superheterodyne receiver, where the selectivity of the receiver is provided by tuned transformers in the intermediate-frequency amplifiers. The Tesla coil is a resonant transformer circuit used to generate very high voltages, and is able to provide much higher current than high voltage electrostatic machines such as the Van de Graaff generator. Resonant energy transfer is the operating principle behind proposed short range (up to 2 metre) wireless electricity systems such as WiTricity or Rezence and systems that have already been deployed, such as Qi power transfer, passive RFID tags and contactless smart cards.