Analysis of an Economical BLDC Drive System
... Dept. of EEE, Mar Athanasius College of Engineering, Kothamangalam, Kerala-686666, India controller due to its simple structure and ease of design. The current control is used to limit the current mainly in modes involving phase C. A simple PWM generator is used to generate the PWM signals to excite ...
... Dept. of EEE, Mar Athanasius College of Engineering, Kothamangalam, Kerala-686666, India controller due to its simple structure and ease of design. The current control is used to limit the current mainly in modes involving phase C. A simple PWM generator is used to generate the PWM signals to excite ...
Power Fundamentals: Buck Regulator Architectures
... driver for each group of FETs will work if the groups of FETs do not share the same switch node. This is precisely the case in a multiphase configuration. Not only does each group of FETs not need to switch simultaneously with the rest of the groups, but all the groups are intentionally switched at ...
... driver for each group of FETs will work if the groups of FETs do not share the same switch node. This is precisely the case in a multiphase configuration. Not only does each group of FETs not need to switch simultaneously with the rest of the groups, but all the groups are intentionally switched at ...
magnetic circuit with air gap
... uniform width, while the fourth side is somewhat thinner. The depth of the core (into the page) is 10cm and the other dimensions are shown in figure. There is 200 turn coil wrapped around the left side of the core. Assuming relative permeability r of 2500, how much flux will be produce by a 1A inpu ...
... uniform width, while the fourth side is somewhat thinner. The depth of the core (into the page) is 10cm and the other dimensions are shown in figure. There is 200 turn coil wrapped around the left side of the core. Assuming relative permeability r of 2500, how much flux will be produce by a 1A inpu ...
lecture1424353251
... •Synchronous Generators: A primary source of electrical energy. •Synchronous Motors: Used as motors as well as power factor compensators (synchronous condensers). •Asynchronous (Induction) Machines: •Induction Motors: Most widely used electrical motors in both domestic and industrial applications. • ...
... •Synchronous Generators: A primary source of electrical energy. •Synchronous Motors: Used as motors as well as power factor compensators (synchronous condensers). •Asynchronous (Induction) Machines: •Induction Motors: Most widely used electrical motors in both domestic and industrial applications. • ...
2015 Power transformers design and analysis with Flux SG CN67
... current is neglected and the core is very little magnetized. However, there is an important leakage of magnetic flux, which provokes Eddy current losses in all the surrounding conductive parts. So this test needs the whole geometry to be correct. The model also comprises distribution bars to model t ...
... current is neglected and the core is very little magnetized. However, there is an important leakage of magnetic flux, which provokes Eddy current losses in all the surrounding conductive parts. So this test needs the whole geometry to be correct. The model also comprises distribution bars to model t ...
Abstract: The use of on-line ... system can be programmed to ...
... Abstract: The use of on-line partial discharge (PD) system can be programmed to collect data under various measurements as an indicator of stator winding insulation machine conditions, thus providing a series of consistent condition, is well known. Trending results from on-line PD data points for tr ...
... Abstract: The use of on-line partial discharge (PD) system can be programmed to collect data under various measurements as an indicator of stator winding insulation machine conditions, thus providing a series of consistent condition, is well known. Trending results from on-line PD data points for tr ...
QUESTION 1
... A certain magnetic circuit may be regarded as consisting of three parts, A, B and C in series, each one of which has a uniform cross-sectional area. Part A has a length of 300 mm and a cross-sectional area of 450 mm2. Part B has a length of 120 mm and a cross-sectional area of 300 mm2. Part C is an ...
... A certain magnetic circuit may be regarded as consisting of three parts, A, B and C in series, each one of which has a uniform cross-sectional area. Part A has a length of 300 mm and a cross-sectional area of 450 mm2. Part B has a length of 120 mm and a cross-sectional area of 300 mm2. Part C is an ...
Space Vectors
... have to reach 5.7735V peak but with the revised drive, that 10V peak of output to the windings is achieved with only 5V peak drive coming from the MOSFETs. Rail voltage collision becomes less of an issue. ...
... have to reach 5.7735V peak but with the revised drive, that 10V peak of output to the windings is achieved with only 5V peak drive coming from the MOSFETs. Rail voltage collision becomes less of an issue. ...
14 - irimee
... diesel engine. The frequency of the alternator output varies with the speed of diesel engine. The voltage is rectified and the power is fed through a d.c. link to the invertor of the tractive system. Drive system uses asynchronous motors. Asynchronous motor when used on railway vehicle has to be sup ...
... diesel engine. The frequency of the alternator output varies with the speed of diesel engine. The voltage is rectified and the power is fed through a d.c. link to the invertor of the tractive system. Drive system uses asynchronous motors. Asynchronous motor when used on railway vehicle has to be sup ...
Topic 12_2__Alternating current
... If a resistor is connected to an AC supply, the following relationship holds: Vrms = IrmsR (V0 = I0R) ac circuits and ohmic resistors This relationship shows that I and V are proportional to each other and in phase. This may seem an obvious relationship but in AC Consumes circuits there are comen ...
... If a resistor is connected to an AC supply, the following relationship holds: Vrms = IrmsR (V0 = I0R) ac circuits and ohmic resistors This relationship shows that I and V are proportional to each other and in phase. This may seem an obvious relationship but in AC Consumes circuits there are comen ...
How To Specify A Slip Ring
... 1. Slip Ring Capsule - A fully integrated A slip ring must be mounted with a flexible u n i t w i t h a h o u s i n g a n d b e a r i n g s . coupling on one side of the unit. Hard 2. Slip Ring Separates - Separate slip ring rotor mounting on both the rotor and stator will and brush blocks for mount ...
... 1. Slip Ring Capsule - A fully integrated A slip ring must be mounted with a flexible u n i t w i t h a h o u s i n g a n d b e a r i n g s . coupling on one side of the unit. Hard 2. Slip Ring Separates - Separate slip ring rotor mounting on both the rotor and stator will and brush blocks for mount ...
Sensorless Rotor Temperature Estimation of Permanent Magnet
... which do not require any temperature sensors to obtain the rotor temperature in PMSMs. Such techniques have been already reported in various papers. The most common approach is a thermal model of the machine. Thermal models imply good knowledge of the geometry, cooling system and especially on the m ...
... which do not require any temperature sensors to obtain the rotor temperature in PMSMs. Such techniques have been already reported in various papers. The most common approach is a thermal model of the machine. Thermal models imply good knowledge of the geometry, cooling system and especially on the m ...
Physics 2054 Lecture Notes
... (red) starts to flow clockwise due to the battery But the buildup of current leads to changing flux in loop Induced emf (green) opposes the change This is a self-induced emf (also called “back” emf) ...
... (red) starts to flow clockwise due to the battery But the buildup of current leads to changing flux in loop Induced emf (green) opposes the change This is a self-induced emf (also called “back” emf) ...
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.