IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... A sensorless BLDC motor drive has been designed for numerous low-power applications. To reduce the switching losses,the BLDC motor is commutated electronically to operate the IGBTs of VSI in the fundamental frequency.The speed of the BLDC motor drive has been controlled by varying the dc-link voltag ...
... A sensorless BLDC motor drive has been designed for numerous low-power applications. To reduce the switching losses,the BLDC motor is commutated electronically to operate the IGBTs of VSI in the fundamental frequency.The speed of the BLDC motor drive has been controlled by varying the dc-link voltag ...
Physical Layer
... line, has an artificially introduced cutoff frequency near 3000 Hz. This restriction means that the number of the highest harmonic passed through is 24000/b, roughly (the cutoff is not sharp). For some commonly used data rates, the numbers work ...
... line, has an artificially introduced cutoff frequency near 3000 Hz. This restriction means that the number of the highest harmonic passed through is 24000/b, roughly (the cutoff is not sharp). For some commonly used data rates, the numbers work ...
A Closed-Loop, Wideband, 100A Active Load
... control voltage and the current sense resistor over a very wide bandwidth. Note that once A1 is biased to Q1’s conduction threshold (by the “DC Load Set”), small variations in A1’s output result in large Q1 channel current changes. As such, large output excursions are not required from A1; its small ...
... control voltage and the current sense resistor over a very wide bandwidth. Note that once A1 is biased to Q1’s conduction threshold (by the “DC Load Set”), small variations in A1’s output result in large Q1 channel current changes. As such, large output excursions are not required from A1; its small ...
Compact Power Line Shelves Features Description
... • Routing of the DC output cables should guarantee that cables are not in contact with sources of heat and surfaces that may damage the cable insulation. • The DC output is not provided with a fuse or circuit breaker suitable for branch circuit protection. Therefore, the power shelf should be mounte ...
... • Routing of the DC output cables should guarantee that cables are not in contact with sources of heat and surfaces that may damage the cable insulation. • The DC output is not provided with a fuse or circuit breaker suitable for branch circuit protection. Therefore, the power shelf should be mounte ...
Rectifiers
... devices are like one-way valves, they allow current to only flow in one direction. If a current tries to flow in the opposite direction, it is stopped by the diode. If you look at an AC waveform, you see a sine-wave shape with one portion of the wave on the positive side of the y-axis and one side ...
... devices are like one-way valves, they allow current to only flow in one direction. If a current tries to flow in the opposite direction, it is stopped by the diode. If you look at an AC waveform, you see a sine-wave shape with one portion of the wave on the positive side of the y-axis and one side ...
simulation model of an input power factor of a single - phase ac
... In the present study, a simulation model of the Single – Phase AC – DC is undertaken to establish the poor power factor of the drive. The choice of this drive is influenced by the fact that: it presents the worst form of harmonics, it has a wide range of applications and it is use in low power motor ...
... In the present study, a simulation model of the Single – Phase AC – DC is undertaken to establish the poor power factor of the drive. The choice of this drive is influenced by the fact that: it presents the worst form of harmonics, it has a wide range of applications and it is use in low power motor ...
ADF5000 数据手册DataSheet 下载
... the +IN A pin of the OP184. This configuration, in turn, allows the use of a single positive supply for the op amp. Alternatively, to optimize performance by ensuring a clean bias voltage, a low noise regulator such as the ADP150 can be used to power the resistor divider network or the +IN A pin dir ...
... the +IN A pin of the OP184. This configuration, in turn, allows the use of a single positive supply for the op amp. Alternatively, to optimize performance by ensuring a clean bias voltage, a low noise regulator such as the ADP150 can be used to power the resistor divider network or the +IN A pin dir ...
Bearing Fault Detector
... ultimately cause machinery failure and downtime. Unfortunately, many instrumentation systems that are intended to assist the maintenance engineer with vibration analysis are complex — and require considerable training and experience in order to interpret measurement data. Too often, companies may en ...
... ultimately cause machinery failure and downtime. Unfortunately, many instrumentation systems that are intended to assist the maintenance engineer with vibration analysis are complex — and require considerable training and experience in order to interpret measurement data. Too often, companies may en ...
Combining an Amplifier with the BUF634
... used for higher frequency applications. As already mentioned, the buffer is located in the feedback loop of the op amp. This configuration compensates the buffer’s internal resistance so that the output resistance of the entire circuit is close to zero. At high frequencies with high loads, however, ...
... used for higher frequency applications. As already mentioned, the buffer is located in the feedback loop of the op amp. This configuration compensates the buffer’s internal resistance so that the output resistance of the entire circuit is close to zero. At high frequencies with high loads, however, ...
RMSL-5012 OG
... The individual user should take care to determine, prior to use or installation, whether this device is suitable, adequate or safe for the use intended. Since individual applications are subject to great variation, DuraComm makers no representation or warranty as to the merchantability, suitability ...
... The individual user should take care to determine, prior to use or installation, whether this device is suitable, adequate or safe for the use intended. Since individual applications are subject to great variation, DuraComm makers no representation or warranty as to the merchantability, suitability ...
fusion 2000w psu
... Now that we are using LiPos with 6-cells or more, the charge voltage required is quite high and this has to be stepped up from the PSU supplied voltage by the charger. Quite apart from any step-up power losses, the power delivered by the charger has to be provided by the PSU. To support a given char ...
... Now that we are using LiPos with 6-cells or more, the charge voltage required is quite high and this has to be stepped up from the PSU supplied voltage by the charger. Quite apart from any step-up power losses, the power delivered by the charger has to be provided by the PSU. To support a given char ...
Paper Title (use style: paper title)
... Figure 6. Four Pole 3 Phase Synchronous Motor Figure 3. Flow Chart of Main Program ...
... Figure 6. Four Pole 3 Phase Synchronous Motor Figure 3. Flow Chart of Main Program ...
BDTIC www.BDTIC.com/infineon AN2010-03 7ED020E12-FI-U1 – Evaluation Board for SmartPIM1
... linear voltage regulator (IC7) provides from this source a second supply voltage of 5 V for the logic selector (IC5, IC6), timer (IC8), and comparators of IC1 to IC4. By default, boot-strap circuits provide power to the high-side IGBT drivers. The connectors X1, X2 and X3 offer the option of using t ...
... linear voltage regulator (IC7) provides from this source a second supply voltage of 5 V for the logic selector (IC5, IC6), timer (IC8), and comparators of IC1 to IC4. By default, boot-strap circuits provide power to the high-side IGBT drivers. The connectors X1, X2 and X3 offer the option of using t ...
lab sheet - Faculty of Engineering
... transconductance gm. Usually RL is fixed, as it is the load resistor, the only recourse available is to increase gm. The gm can be increased by increasing the dc collector current IC. Hence, for this experiment you will notice that IC is in the range of 6-7mA. Typical IC for small signal amplifier i ...
... transconductance gm. Usually RL is fixed, as it is the load resistor, the only recourse available is to increase gm. The gm can be increased by increasing the dc collector current IC. Hence, for this experiment you will notice that IC is in the range of 6-7mA. Typical IC for small signal amplifier i ...
Power Flow Control and Voltage Profile Improvement Using Unified
... the loop equations and methods using Gauss-type solutions. This method was laborious because the network loops has to be specified by hand by the systems engineer. The drawback of these algorithms is that they exhibit poor convergence characteristics when applied to the solution of the networks. To ...
... the loop equations and methods using Gauss-type solutions. This method was laborious because the network loops has to be specified by hand by the systems engineer. The drawback of these algorithms is that they exhibit poor convergence characteristics when applied to the solution of the networks. To ...
wireless and carrier communication based smart metering
... The important properties of smart meters are also simulated using MATLAB simulation software where problems of unbalance and harmonics are targeted their results are produced in previous paper. Below a detail description of smart meter development and associated hardware is produced. These involves ...
... The important properties of smart meters are also simulated using MATLAB simulation software where problems of unbalance and harmonics are targeted their results are produced in previous paper. Below a detail description of smart meter development and associated hardware is produced. These involves ...
Hot Plug Express Card
... doublewide, each with different current specifications. The schematic drawing and parts list in this application note are for the singlewide module. There are schematic notes for two component changes for doublewide. SIOM is used for high avability and requires hot swap modules so that the computer ...
... doublewide, each with different current specifications. The schematic drawing and parts list in this application note are for the singlewide module. There are schematic notes for two component changes for doublewide. SIOM is used for high avability and requires hot swap modules so that the computer ...
IRMCF3xx Series Controller Dynamics and Tuning
... 3) Figure 11 shows ramp speed response with non-optimized (KpSreg = Kp1, KxSreg = Kx1) and optimized (KpSreg = Kp3, KxSreg = Kx3) speed regulator gains. A tighter control response is exemplified with the gain optimization. ...
... 3) Figure 11 shows ramp speed response with non-optimized (KpSreg = Kp1, KxSreg = Kx1) and optimized (KpSreg = Kp3, KxSreg = Kx3) speed regulator gains. A tighter control response is exemplified with the gain optimization. ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.