chapter 1 - Portal UniMAP
... When AC voltage is applied to the primary winding of the transformer, an AC current will result i1 or i2 (current at load). The AC primary current i1 set up time varying magnetic flux f in the core. The flux links the secondary winding of the transformer. From the Faraday law, the emf will be ...
... When AC voltage is applied to the primary winding of the transformer, an AC current will result i1 or i2 (current at load). The AC primary current i1 set up time varying magnetic flux f in the core. The flux links the secondary winding of the transformer. From the Faraday law, the emf will be ...
Energy Control - Gettysburg College
... Electrical Safety Electrical Safety is important in every work and living environment. The danger of injury through electrical shock is possible whenever electrical power is present. When a person's body completes a circuit and thus connects a power source with the ground, as electrical burn or inj ...
... Electrical Safety Electrical Safety is important in every work and living environment. The danger of injury through electrical shock is possible whenever electrical power is present. When a person's body completes a circuit and thus connects a power source with the ground, as electrical burn or inj ...
Inductance, capacitance and resistance
... Some units incorporate the use of magnetic brakes and clutches. • This allows for a greater control during either starting or stopping the unit. • Can be used to prevent undue binding on the mechanical linkage connected to the motor or may disengage the motor when not needed as in the case of the be ...
... Some units incorporate the use of magnetic brakes and clutches. • This allows for a greater control during either starting or stopping the unit. • Can be used to prevent undue binding on the mechanical linkage connected to the motor or may disengage the motor when not needed as in the case of the be ...
Electrical Safety - Gettysburg College
... Electrical Safety Electrical Safety is important in every work and living environment. The danger of injury through electrical shock is possible whenever electrical power is present. When a person's body completes a circuit and thus connects a power source with the ground, as electrical burn or inj ...
... Electrical Safety Electrical Safety is important in every work and living environment. The danger of injury through electrical shock is possible whenever electrical power is present. When a person's body completes a circuit and thus connects a power source with the ground, as electrical burn or inj ...
J. Hu, A.D. Sagneri, J.M. Rivas, Y. Han, S.M. Davis, and D.J. Perreault, “High-Frequency Resonant SEPIC Converter with Wide Input and Output Voltage Ranges,” IEEE Transactions on Power Electronics , Vol. 27, No. 1, pp. 189-200, Jan. 2012.
... fixed frequency control techniques to achieve these goals. This paper introduces a quasi-resonant SEPIC converter, resonant gate drive and associated control methods suitable for converter designs at frequencies above 10 MHz. Unlike many resonant converter designs [1]–[4], the proposed approach prov ...
... fixed frequency control techniques to achieve these goals. This paper introduces a quasi-resonant SEPIC converter, resonant gate drive and associated control methods suitable for converter designs at frequencies above 10 MHz. Unlike many resonant converter designs [1]–[4], the proposed approach prov ...
Zero-voltage switching for three-level capacitor clamping
... high-voltage high-power installation ( 1 MVA) is demanded. On the other hand, hard-switching frequency of the present high-power IGBT components is severely limited to a few kilohertz or even less [9], [10] due to the enormous switching loss. Besides the voltage/current spikes resulting from turn-on ...
... high-voltage high-power installation ( 1 MVA) is demanded. On the other hand, hard-switching frequency of the present high-power IGBT components is severely limited to a few kilohertz or even less [9], [10] due to the enormous switching loss. Besides the voltage/current spikes resulting from turn-on ...
AFR 10_Manual_English-5
... entering the equipment. For correct function it is important to provide enough cooling of the instrument. Inside the cabinet a correct air circulation should be kept. In close proximity to the instrument and especially below it should not be installed any other instruments and equipment which could ...
... entering the equipment. For correct function it is important to provide enough cooling of the instrument. Inside the cabinet a correct air circulation should be kept. In close proximity to the instrument and especially below it should not be installed any other instruments and equipment which could ...
Possum electronic transformer
... dimensions and so much power. One Possum can be connected to up to three low voltage halogen lamps. Each transformer offers smooth step-less dimming. Possum has a large wiring space, multiple terminals and tool free cable grip. All this at a price as small as the external dimensions of the new Possu ...
... dimensions and so much power. One Possum can be connected to up to three low voltage halogen lamps. Each transformer offers smooth step-less dimming. Possum has a large wiring space, multiple terminals and tool free cable grip. All this at a price as small as the external dimensions of the new Possu ...
The Synchronous Machine
... functions as an alternator or motor, the only difference being the direction of energy flow. If an excessive generating or motoring torque is applied then the magnetic forces linking the two fields together may not be sufficient to maintain the locking effect and synchronism will be lost. Operation ...
... functions as an alternator or motor, the only difference being the direction of energy flow. If an excessive generating or motoring torque is applied then the magnetic forces linking the two fields together may not be sufficient to maintain the locking effect and synchronism will be lost. Operation ...
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.