2 Wind Energy Conversion Systems
... highly variable, both in space and in time. The importance of this variability becomes critical since it is amplified by the cubic relation of the available energy. The variability in time of the wind can be divided into three distinct time scales (Burton et al. 2001). First, the large time scale va ...
... highly variable, both in space and in time. The importance of this variability becomes critical since it is amplified by the cubic relation of the available energy. The variability in time of the wind can be divided into three distinct time scales (Burton et al. 2001). First, the large time scale va ...
Lexium™ 32i Integrated drives Motion control
... The modular product range: Lexium™ 32i integrated drives, features two communication interfaces for controlling Lexium BMI servo motors. These servo motors help to integrate the power stage that provides a direct power supply from either a single-phase or three-phase AC supply. This allows Lexium 32 ...
... The modular product range: Lexium™ 32i integrated drives, features two communication interfaces for controlling Lexium BMI servo motors. These servo motors help to integrate the power stage that provides a direct power supply from either a single-phase or three-phase AC supply. This allows Lexium 32 ...
Gas Insulated Switchgear
... Maritime Research Institute), HIRI(Hyundai Industrial Research Institute) ...
... Maritime Research Institute), HIRI(Hyundai Industrial Research Institute) ...
Document
... Things to know (a)deduce from Faraday’s experiments on electromagnetic induction or other appropriate experiments: (i) that a changing magnetic field can induce an e.m.f. in a circuit (ii) that the direction of the induced e.m.f. opposes the change producing it (iii) the factors affecting the magnit ...
... Things to know (a)deduce from Faraday’s experiments on electromagnetic induction or other appropriate experiments: (i) that a changing magnetic field can induce an e.m.f. in a circuit (ii) that the direction of the induced e.m.f. opposes the change producing it (iii) the factors affecting the magnit ...
20144109 Modeling and Control of Radial Force - Hori
... ABSTRACT: In this paper, various methods to reduce noise and vibration of IPMSMs are introduced, especially focused on radial electromagnetic force fluctuation. Electrical 2nd and 6th order radial force is known to cause serious noise and vibration problem. Firstly the method to reduce radial force b ...
... ABSTRACT: In this paper, various methods to reduce noise and vibration of IPMSMs are introduced, especially focused on radial electromagnetic force fluctuation. Electrical 2nd and 6th order radial force is known to cause serious noise and vibration problem. Firstly the method to reduce radial force b ...
Understanding Resolvers and Resolver- to-Digital
... is a at generic termbasic for such devices deLike all transformers, the carrier Rotasynor(as well as signal a traditional rived from the fact that their most level they operresolver) requires an AC reference (some(θ) and its X and Y components is that of a right ference signal (sometimes also called ...
... is a at generic termbasic for such devices deLike all transformers, the carrier Rotasynor(as well as signal a traditional rived from the fact that their most level they operresolver) requires an AC reference (some(θ) and its X and Y components is that of a right ference signal (sometimes also called ...
Behaviour of transformers under DC/GIC excitation
... return mode (GRM) DC currents may impact the substation design. Some utilities have experimented use of Neutral DC Current Blocking Devices to limit the harmful effect of these currents [7]. More generally, users located in areas where geomagnetically induced currents (GIC) may occur often specify t ...
... return mode (GRM) DC currents may impact the substation design. Some utilities have experimented use of Neutral DC Current Blocking Devices to limit the harmful effect of these currents [7]. More generally, users located in areas where geomagnetically induced currents (GIC) may occur often specify t ...
relay problems
... of wire is in series with the run winding of the motor. Internally, normally open relay contacts, wired in series with the start winding, are attached to a vertical armature. Current in the run winding is at its peak when power is first applied to the compressor. Initially, a solenoid effect acts on ...
... of wire is in series with the run winding of the motor. Internally, normally open relay contacts, wired in series with the start winding, are attached to a vertical armature. Current in the run winding is at its peak when power is first applied to the compressor. Initially, a solenoid effect acts on ...
OH3424982502
... A short circuit of a few turns of the winding will give rise to a heavy fault current in the shortcircuited loop, but the terminal currents will be very ...
... A short circuit of a few turns of the winding will give rise to a heavy fault current in the shortcircuited loop, but the terminal currents will be very ...
Development of the Electro-Magnetic Brake
... 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 se ...
... 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 se ...
Basics of Control Components
... Motor starters, contactors, and relays are examples of devices that open and close contacts electromagnetically. The electromagnet in these devices is called a coil. A coil is commonly symbolized as a circle with one or more letters and possibly a number inside. The letters often represent the type ...
... Motor starters, contactors, and relays are examples of devices that open and close contacts electromagnetically. The electromagnet in these devices is called a coil. A coil is commonly symbolized as a circle with one or more letters and possibly a number inside. The letters often represent the type ...
069 - electrical conversion systems
... turbine power is sufficient, particularly when star-delta switching at the rotor winding is applied. At wind speeds above the rated wind speed, the power is reduced by pitching the blades. 3) Variable speed wind turbines with direct-drive synchronous generator (VTDD) In this system, no gearbox is ne ...
... turbine power is sufficient, particularly when star-delta switching at the rotor winding is applied. At wind speeds above the rated wind speed, the power is reduced by pitching the blades. 3) Variable speed wind turbines with direct-drive synchronous generator (VTDD) In this system, no gearbox is ne ...
Modeling and Control of Electrical Drives
... design and the low non-recurring engineering costs relative to an ASIC design (notwithstanding the generally higher unit cost), offer advantages for many applications. FPGAs contain programmable logic components called "logic blocks", and a hierarchy of reconfigurable interconnects that allow the bl ...
... design and the low non-recurring engineering costs relative to an ASIC design (notwithstanding the generally higher unit cost), offer advantages for many applications. FPGAs contain programmable logic components called "logic blocks", and a hierarchy of reconfigurable interconnects that allow the bl ...
Optimizing High Level Micro Stepping of
... As shown in Figure 4, a DAC is used to give voltage to VREFx with minimum resolution. For example, if a 10-bit DAC is used, and maximum value 1024 stands for 2.5 V, the DAC outputs 2.5 V/1024 = 2.4 mV each step. The regulated current in winding is measured by monitoring the voltage of the sense resi ...
... As shown in Figure 4, a DAC is used to give voltage to VREFx with minimum resolution. For example, if a 10-bit DAC is used, and maximum value 1024 stands for 2.5 V, the DAC outputs 2.5 V/1024 = 2.4 mV each step. The regulated current in winding is measured by monitoring the voltage of the sense resi ...
section 262913 - enclosed controllers
... (Engineer shall edit specifications and blue text in header to meet project requirements. This includes but is not limited to updating Equipment and/or Material Model Numbers indicated in the specifications and adding any additional specifications that may be required by the project. Also turn off a ...
... (Engineer shall edit specifications and blue text in header to meet project requirements. This includes but is not limited to updating Equipment and/or Material Model Numbers indicated in the specifications and adding any additional specifications that may be required by the project. Also turn off a ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.