chap02_dc machines_260107
... (whose entire flux is proportional to armature current). It combines the best features of both the shunt and the series motors. Like a series motor, it has extra torque for starting; like a shunt motor, it does not over speed at no load. At light loads, the series field has a very small effect, so t ...
... (whose entire flux is proportional to armature current). It combines the best features of both the shunt and the series motors. Like a series motor, it has extra torque for starting; like a shunt motor, it does not over speed at no load. At light loads, the series field has a very small effect, so t ...
Soft Magnetic Materials
... Ferrites are black, hard, brittle, chemically inert ceramic materials, which have a magnetic cubic structure. The most general ferrites are polycrystalline magnetic ceramic oxides, which are compounds of iron oxide, Fe203 mixed with one or more oxides of bivalent transition metals such as Fe0, Ni0, ...
... Ferrites are black, hard, brittle, chemically inert ceramic materials, which have a magnetic cubic structure. The most general ferrites are polycrystalline magnetic ceramic oxides, which are compounds of iron oxide, Fe203 mixed with one or more oxides of bivalent transition metals such as Fe0, Ni0, ...
Performance of Line-start Permanent Magnet Synchronous Motor
... In recent years, Line-start Permanent Magnet Synchronous Motor (LSPMSM) has attracted the attention of a large number of scholars and manufacturers, for its advantages of high efficiency, high power factor and wide economic operation range [1-3]. The LSPMSM, which inherits the structure characterist ...
... In recent years, Line-start Permanent Magnet Synchronous Motor (LSPMSM) has attracted the attention of a large number of scholars and manufacturers, for its advantages of high efficiency, high power factor and wide economic operation range [1-3]. The LSPMSM, which inherits the structure characterist ...
MAX8545/MAX8546/MAX8548 Low-Cost, Wide Input Range, Step-Down Controllers with Foldback Current Limit General Description
... The MAX8545/MAX8546/MAX8548 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers ideal for a variety of cost-sensitive applications. They drive low-cost n-channel MOSFETs for both the high-side switch and synchronous rectifier, and require no external current-sense resistor. The ...
... The MAX8545/MAX8546/MAX8548 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers ideal for a variety of cost-sensitive applications. They drive low-cost n-channel MOSFETs for both the high-side switch and synchronous rectifier, and require no external current-sense resistor. The ...
Aalborg Universitet Minimization
... added to the reference voltage waveforms, has been optimized. Ewanchuk et al. [7] proposed the integration of three different CIs into one three-limb core. However, in order to suppress the circulating current using the three-limb core, the CM voltage difference between the two parallel VSCs should ...
... added to the reference voltage waveforms, has been optimized. Ewanchuk et al. [7] proposed the integration of three different CIs into one three-limb core. However, in order to suppress the circulating current using the three-limb core, the CM voltage difference between the two parallel VSCs should ...
pin diode - UniMAP Portal
... reduce the noise and slow switching response when it radiates to light as in the case of conventional photo diodes The reduce noise and increased speed can also be achieved due to the fact that it has higher resistivity than other devices of this family The speed of the PIN diode is limited by varia ...
... reduce the noise and slow switching response when it radiates to light as in the case of conventional photo diodes The reduce noise and increased speed can also be achieved due to the fact that it has higher resistivity than other devices of this family The speed of the PIN diode is limited by varia ...
Electromechanical Relays
... • In a microwave oven, the push of a few tiny buttons on the keypad gives commands to a microcontroller, which can produce only very small output voltages. Those small voltages turn on a relay, which is capable of controlling the large voltages and currents required to produce the heating effect th ...
... • In a microwave oven, the push of a few tiny buttons on the keypad gives commands to a microcontroller, which can produce only very small output voltages. Those small voltages turn on a relay, which is capable of controlling the large voltages and currents required to produce the heating effect th ...
Hola Agustin - Portal UniMAP
... 2.7 Operation under load When the load switch in the secondary circuit of the transformer in Fig 2-7 is closed, a current IX, equal to VX divided by the load impedance, will flow. By Lenz’s law, any current caused to flow by an induced emf flows in such direction as to oppose the action that causes ...
... 2.7 Operation under load When the load switch in the secondary circuit of the transformer in Fig 2-7 is closed, a current IX, equal to VX divided by the load impedance, will flow. By Lenz’s law, any current caused to flow by an induced emf flows in such direction as to oppose the action that causes ...
Fundamental Relay-Operating Principles
... attempt to interrupt the flow of the circuit tripcoil current, some relays are provided with a holding mechanism comprising a small coil in series with the contacts; this coil is on a small electromagnet that acts on a small armature on the moving contact assembly to hold the contacts tightly closed ...
... attempt to interrupt the flow of the circuit tripcoil current, some relays are provided with a holding mechanism comprising a small coil in series with the contacts; this coil is on a small electromagnet that acts on a small armature on the moving contact assembly to hold the contacts tightly closed ...
Aluminum Electrolytic Capacitors
... to the cathode foil. If the opposite polarity were to be applied, this would cause an electrolytic process resulting in the formation of a dielectric layer on the cathode foil. In this case strong internal heat generation and gas emission may occur and destroy the capacitor. Secondly, the cathode ca ...
... to the cathode foil. If the opposite polarity were to be applied, this would cause an electrolytic process resulting in the formation of a dielectric layer on the cathode foil. In this case strong internal heat generation and gas emission may occur and destroy the capacitor. Secondly, the cathode ca ...
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.