Optimal Commutation of a BLDC Motor by Utilizing the Symmetric
... a BLDC motor is energized at the incorrect commutation position. VBF and VEF are the filtered terminal voltages of the nonenergized phase at the beginning and end of the commutation period, respectively. Measured values of VBF and VEF are not symmetric not only because the ...
... a BLDC motor is energized at the incorrect commutation position. VBF and VEF are the filtered terminal voltages of the nonenergized phase at the beginning and end of the commutation period, respectively. Measured values of VBF and VEF are not symmetric not only because the ...
LTC1799 - 1kHz to 33MHz Resistor Set SOT
... pin may be floated or driven to midsupply to select ÷10, the intermediate frequency range. The lowest frequency range, ÷100, is selected by tying DIV to V+ or driving it to within 0.4V of V+. Figure 2 shows the relationship between RSET, divider setting and output frequency, including the overlappin ...
... pin may be floated or driven to midsupply to select ÷10, the intermediate frequency range. The lowest frequency range, ÷100, is selected by tying DIV to V+ or driving it to within 0.4V of V+. Figure 2 shows the relationship between RSET, divider setting and output frequency, including the overlappin ...
Bridgeless High-Power-Factor Buck Converter
... Another drawback of the universal-line boost PFC front-end is related to its relatively high output voltage, typically in the 380–400 V range. This high voltage not only has a detrimental effect on the switching losses of the boost converter, but also on the switching losses of the primary switches ...
... Another drawback of the universal-line boost PFC front-end is related to its relatively high output voltage, typically in the 380–400 V range. This high voltage not only has a detrimental effect on the switching losses of the boost converter, but also on the switching losses of the primary switches ...
UBA20261/2 600 V and 350 V power IC for step dimmable CFLs
... The UBA20261/2 are high-voltage power integrated circuits designed to drive and control high powered self-ballasted Compact Fluorescent Lamp (CFL) lighting applications operating at mains supply voltages of 120 V or 230 V. The IC includes a half-bridge power circuit consisting of two NMOST power MOS ...
... The UBA20261/2 are high-voltage power integrated circuits designed to drive and control high powered self-ballasted Compact Fluorescent Lamp (CFL) lighting applications operating at mains supply voltages of 120 V or 230 V. The IC includes a half-bridge power circuit consisting of two NMOST power MOS ...
MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies General Description
... transformer winding can be wound to provide a wide range of isolated voltages. The MAX256 delivers 3W of power to the transformer with a +5V supply (-40°C to +85°C). The MAX256 produces up to 2.5W over the +85°C to +125°C temperature range. For a supply voltage of +3.3V, the MAX256 delivers 2W of po ...
... transformer winding can be wound to provide a wide range of isolated voltages. The MAX256 delivers 3W of power to the transformer with a +5V supply (-40°C to +85°C). The MAX256 produces up to 2.5W over the +85°C to +125°C temperature range. For a supply voltage of +3.3V, the MAX256 delivers 2W of po ...
DS1813 - Maxim Integrated
... The DS1813 provides the functions of detecting out-of-tolerance power-supply conditions and warning a processor-based system of impending power failure. When VCC is detected as out-of-tolerance, the RST signal is asserted. On power-up, RST is kept active for approximately 150ms after the power suppl ...
... The DS1813 provides the functions of detecting out-of-tolerance power-supply conditions and warning a processor-based system of impending power failure. When VCC is detected as out-of-tolerance, the RST signal is asserted. On power-up, RST is kept active for approximately 150ms after the power suppl ...
Using a Digital Multimeter
... circuits, red color implies the positive terminal, black color the negative (or ground). These colors don’t apply to AC circuits, but we will retain the convention to make the analysis clearer. ...
... circuits, red color implies the positive terminal, black color the negative (or ground). These colors don’t apply to AC circuits, but we will retain the convention to make the analysis clearer. ...
P84024
... signaling appliances, powered by the same source and include any required safety factor. ...
... signaling appliances, powered by the same source and include any required safety factor. ...
AN51 - Power Conditioning for Notebook and Palmtop Systems
... LT1432 VC pin then sinks this current to control the loop. C4 forms the dominant loop pole with a loop zero added by R1. C5 forms a higher frequency loop pole to control switching ripple at the VC pin. A floating 5V power supply for the switcher is generated by D2 and C3 which peak detect the output ...
... LT1432 VC pin then sinks this current to control the loop. C4 forms the dominant loop pole with a loop zero added by R1. C5 forms a higher frequency loop pole to control switching ripple at the VC pin. A floating 5V power supply for the switcher is generated by D2 and C3 which peak detect the output ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) ISSN: , PP: 27-32 www.iosrjournals.org
... factor while being started directly from a 3-phase supply. In order to mitigate the adverse effects of starting torque transients and high inrush currents in induction motors, a popular method is to use electronically controlled soft-starting voltages utilizing IGBT’s. Normally soft-starters are use ...
... factor while being started directly from a 3-phase supply. In order to mitigate the adverse effects of starting torque transients and high inrush currents in induction motors, a popular method is to use electronically controlled soft-starting voltages utilizing IGBT’s. Normally soft-starters are use ...
LM2675 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator
... A family of standard inductors for use with the LM2675 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the datasheet are selector guides for diodes and capacitors designed to work ...
... A family of standard inductors for use with the LM2675 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the datasheet are selector guides for diodes and capacitors designed to work ...
Current Source Inverter
... devices, like say transistors, are used in the above circuits, replacing thyristors, with bulky commutation circuits needed to turn them OFF, these being force-commutated ones. In the last two (5.7-5.8) lessons in this module, the circuit and operation of different types of single-phase and three-ph ...
... devices, like say transistors, are used in the above circuits, replacing thyristors, with bulky commutation circuits needed to turn them OFF, these being force-commutated ones. In the last two (5.7-5.8) lessons in this module, the circuit and operation of different types of single-phase and three-ph ...
Using a Digital Multimeter
... circuits, red color implies the positive terminal, black color the negative (or ground). These colors don’t apply to AC circuits, but we will retain the convention to make the analysis clearer. ...
... circuits, red color implies the positive terminal, black color the negative (or ground). These colors don’t apply to AC circuits, but we will retain the convention to make the analysis clearer. ...
Harmonic Distortion Reduction Technique for Uninterruptible Power
... under nonlinear loads, many improved control systems have been proposed such as sliding mode control, multi-loop, optimal state feedback, repetitive-based control, deadbeat control, and many others [1]-[7]. Although such types of feedback control approaches have fast transient response, the distorti ...
... under nonlinear loads, many improved control systems have been proposed such as sliding mode control, multi-loop, optimal state feedback, repetitive-based control, deadbeat control, and many others [1]-[7]. Although such types of feedback control approaches have fast transient response, the distorti ...
Wien Bridge Oscillator Automatic Gain Control (AGC)
... Resistor R1 is replaced by the series combination of R1A = 300Ω and a MOSFET from the MC14007 array. The MOSFET is being used in the triode region as a voltage controlled resistor. A typical plot of channel resistance Ron vs. gate control voltage VGS is shown in Figure 6.7. Note that as gate voltag ...
... Resistor R1 is replaced by the series combination of R1A = 300Ω and a MOSFET from the MC14007 array. The MOSFET is being used in the triode region as a voltage controlled resistor. A typical plot of channel resistance Ron vs. gate control voltage VGS is shown in Figure 6.7. Note that as gate voltag ...
Electrical ballast
An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.