Elec467 Power Machines & Transformers
... Here resistance is added to the field branch. This decreases Φp (1) which causes the counter emf in the armature branch to decrease. The voltage drop Ea across the armature (2) drops because the field current decreases to a critical point when it begins to adjust to a new constant value. Ia & TD wil ...
... Here resistance is added to the field branch. This decreases Φp (1) which causes the counter emf in the armature branch to decrease. The voltage drop Ea across the armature (2) drops because the field current decreases to a critical point when it begins to adjust to a new constant value. Ia & TD wil ...
§7 Designing with Logic
... The pulse width (tw) of a signal is measured at 50% of the amplitude. However, these definitions must be used for digital circuits with certain qualifications because, in most cases, the switching threshold (VT) of the input is not 50% of the amplitude. So, the level needed by the circuit must be co ...
... The pulse width (tw) of a signal is measured at 50% of the amplitude. However, these definitions must be used for digital circuits with certain qualifications because, in most cases, the switching threshold (VT) of the input is not 50% of the amplitude. So, the level needed by the circuit must be co ...
AP3154A - Diodes Incorporated
... For an SDI command to be successfully received by the AP3154A, all SDI timing specifications should be satisfied. When no command is being sent the SDI pin should be held high. If the SDI pin goes low and stays low for a time length of between TSLO(min) and TSLO(max) and then goes high and stays hig ...
... For an SDI command to be successfully received by the AP3154A, all SDI timing specifications should be satisfied. When no command is being sent the SDI pin should be held high. If the SDI pin goes low and stays low for a time length of between TSLO(min) and TSLO(max) and then goes high and stays hig ...
Data sheets of Screen Grid Power Supply (SGPS)
... Suitable for the application mentioned Suitable for RC parallel R : ~200 Ω ; C : ~5nF Power supply must be able to sink 10% of negative current. A suitable bleeder would be provided No switching device between bleeder and output. 415±10% VAC, 50Hz, Three Phase-5wire MCCB MOV or any other Surge Suppr ...
... Suitable for the application mentioned Suitable for RC parallel R : ~200 Ω ; C : ~5nF Power supply must be able to sink 10% of negative current. A suitable bleeder would be provided No switching device between bleeder and output. 415±10% VAC, 50Hz, Three Phase-5wire MCCB MOV or any other Surge Suppr ...
AN495
... the Vreg pin makes available a regulated voltage that can be used to supply external circuits (typically proximity detectors); but the TDE1707 itself, always uses the Vreg to supply most of its internal circuits (see: Block diagram). Internally to the TDE1707, Vreg supplies all the functional blocks ...
... the Vreg pin makes available a regulated voltage that can be used to supply external circuits (typically proximity detectors); but the TDE1707 itself, always uses the Vreg to supply most of its internal circuits (see: Block diagram). Internally to the TDE1707, Vreg supplies all the functional blocks ...
A Comparative Study of Various Controllers for Static Synchronous
... connected in Wye (Y) or Delta (D) [7]. The four transformer primary windings are connected in series and the converter pulse patterns are phase shifted so that the four voltage fundamental components sum in phase on the primary side. Each 3-level inverter generates three square-wave voltages which c ...
... connected in Wye (Y) or Delta (D) [7]. The four transformer primary windings are connected in series and the converter pulse patterns are phase shifted so that the four voltage fundamental components sum in phase on the primary side. Each 3-level inverter generates three square-wave voltages which c ...
ISSCC 2010 / SESSION 10 / DC
... and c1_h, c2_h, and consequently to short-circuit currents. Although increasing dead-time can mitigate these issues, it comes at the penalty of reduced efficiency due to lower effective power-transfer duty cycle. To minimize level-shifterinduced clock mismatch, the design shown in Fig. 10.8.3 DC bia ...
... and c1_h, c2_h, and consequently to short-circuit currents. Although increasing dead-time can mitigate these issues, it comes at the penalty of reduced efficiency due to lower effective power-transfer duty cycle. To minimize level-shifterinduced clock mismatch, the design shown in Fig. 10.8.3 DC bia ...
A Fresh Approach to Switching Regulator Topologies and
... • A CCM systems will enter DCM at low loads and/or high input voltages • Current mode automatically limits the current in the primary winding • This reduces the maximum current specifications for the transformer, the line filter and the rectifier, saving costs • Easy to implement many protection fun ...
... • A CCM systems will enter DCM at low loads and/or high input voltages • Current mode automatically limits the current in the primary winding • This reduces the maximum current specifications for the transformer, the line filter and the rectifier, saving costs • Easy to implement many protection fun ...
KG2317111721
... other industrial applications. This configuration features low cost and reliable operation due to the use of a diode rectifier, but it generates highly distorted input line currents and does not have regenerative or dynamic braking capability [6]. These problems can be mitigated by using a back-to b ...
... other industrial applications. This configuration features low cost and reliable operation due to the use of a diode rectifier, but it generates highly distorted input line currents and does not have regenerative or dynamic braking capability [6]. These problems can be mitigated by using a back-to b ...
Review_of_ac_Signals
... could have added a constant voltage to these waveforms; this can be done easily using the “dc offset” feature of the function generator. In that case the waveforms would have been shifted upward or downward by an amount equal to the DC offset. We would then modify Equation (1) by adding a constant t ...
... could have added a constant voltage to these waveforms; this can be done easily using the “dc offset” feature of the function generator. In that case the waveforms would have been shifted upward or downward by an amount equal to the DC offset. We would then modify Equation (1) by adding a constant t ...
ULTRA SLIMPAK G468-0001 ® AC Input Field Configurable Isolator
... 5mA to 100mA or 50mV to 250V. For AC current measurements above 100mA, use the model C006 shunt resistor (0.1 Ohm, 5Watt). This resistor must be wired in series with the current source, with the G468 configured to measure the voltage generated across the resistor (see Figure 3 for an example). The D ...
... 5mA to 100mA or 50mV to 250V. For AC current measurements above 100mA, use the model C006 shunt resistor (0.1 Ohm, 5Watt). This resistor must be wired in series with the current source, with the G468 configured to measure the voltage generated across the resistor (see Figure 3 for an example). The D ...
War of Currents
... transformer. Available power is the product of current × voltage at the load. For a given amount of power, a low voltage requires a higher current and a higher voltage requires a lower current. Since metal conducting wires have an almost fixed electrical resistance, some power will be wasted as heat ...
... transformer. Available power is the product of current × voltage at the load. For a given amount of power, a low voltage requires a higher current and a higher voltage requires a lower current. Since metal conducting wires have an almost fixed electrical resistance, some power will be wasted as heat ...
10. energy efficient technologies in electrical systems
... Various types of automatic power factor controls are available with relay / microprocessor logic. Two of the most common controls are: Voltage Control and kVAr Control Voltage Control Voltage alone can be used as a source of intelligence when the switched capacitors are applied at point where the ci ...
... Various types of automatic power factor controls are available with relay / microprocessor logic. Two of the most common controls are: Voltage Control and kVAr Control Voltage Control Voltage alone can be used as a source of intelligence when the switched capacitors are applied at point where the ci ...
jetrack lan - Lanopia GmbH
... The optical transceiver contains an EEPROM. It provides access to sophisticated identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information The serial interface uses the 2-wire serial CMOS EEPROM protocol defined for the ATMEL AT ...
... The optical transceiver contains an EEPROM. It provides access to sophisticated identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information The serial interface uses the 2-wire serial CMOS EEPROM protocol defined for the ATMEL AT ...
localization of small fast moving objects using doppler radar
... During analysis of the signals that are changing its nature quickly is essential to take in account the frequency contents of the short signal segments. That means unwrapping the concept of short-term spectrum enabling us to define spectrum as a two dimensional function dependent on frequency and po ...
... During analysis of the signals that are changing its nature quickly is essential to take in account the frequency contents of the short signal segments. That means unwrapping the concept of short-term spectrum enabling us to define spectrum as a two dimensional function dependent on frequency and po ...
Design of Z-Source Inverter for Voltage Boost Application
... also be used for power factor improvement (FACTS). The input to the inverter may be from a battery, fuel cell, solar cell, or other dc source. The traditional inverters that are commonly used are VSI & CSI. The V-source converter is a buck (step-down) inverter for dc-to-ac power conversion and the V ...
... also be used for power factor improvement (FACTS). The input to the inverter may be from a battery, fuel cell, solar cell, or other dc source. The traditional inverters that are commonly used are VSI & CSI. The V-source converter is a buck (step-down) inverter for dc-to-ac power conversion and the V ...
Document
... as well as reliability of the electric drive including its power electronics, electric motor etc. • The current generation Hi Voltage PWM (pulse width modulated) drives operating at high altitude have higher levels of electrical and mechanical stress compared with those encountered in the past. • Ai ...
... as well as reliability of the electric drive including its power electronics, electric motor etc. • The current generation Hi Voltage PWM (pulse width modulated) drives operating at high altitude have higher levels of electrical and mechanical stress compared with those encountered in the past. • Ai ...
MAX8836Z 1.2A PWM Step-Down Converter in General Description
... feedback network. By taking DC feedback from the LX node through R1 in Figure 1, the usual phase lag due to the output capacitor is removed, making the loop exceedingly stable and allowing the use of very small ceramic output capacitors. To improve the load regulation, resistor R3 is included in the ...
... feedback network. By taking DC feedback from the LX node through R1 in Figure 1, the usual phase lag due to the output capacitor is removed, making the loop exceedingly stable and allowing the use of very small ceramic output capacitors. To improve the load regulation, resistor R3 is included in the ...
Generation of a sine wave
... Sine waves are characterized by the amplitude and period. The amplitude (A) is the maximum value of a voltage or current; the period (T) is the time interval for one complete cycle. 20 V ...
... Sine waves are characterized by the amplitude and period. The amplitude (A) is the maximum value of a voltage or current; the period (T) is the time interval for one complete cycle. 20 V ...
High-Frequency Link: A Solution for Using Only One DC Source in
... and the smaller or auxiliary (aux) H-bridges return power at some operation ranges (voltage amplitudes), even when the machine is motoring; therefore, auxiliary H-bridges must be bidirectional [12], [13]. Some solutions to overcome CHB and ACHB drawbacks have been proposed, such as the use of floati ...
... and the smaller or auxiliary (aux) H-bridges return power at some operation ranges (voltage amplitudes), even when the machine is motoring; therefore, auxiliary H-bridges must be bidirectional [12], [13]. Some solutions to overcome CHB and ACHB drawbacks have been proposed, such as the use of floati ...
Article
... the MEG Experiment at PSI, Switzerland. This experiment searches for the lepton-flavor violating decay + e+ with a sensitivity down to 10-13. After a first prototype (DRS1), the second prototype (DRS2) has been fabricated in a 0.25 m CMOS process and successfully been tested. It contains 10 cha ...
... the MEG Experiment at PSI, Switzerland. This experiment searches for the lepton-flavor violating decay + e+ with a sensitivity down to 10-13. After a first prototype (DRS1), the second prototype (DRS2) has been fabricated in a 0.25 m CMOS process and successfully been tested. It contains 10 cha ...
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.