J. Hu, A.D. Sagneri, J.M. Rivas, Y. Han, S.M. Davis, and D.J. Perreault, “High-Frequency Resonant SEPIC Converter with Wide Input and Output Voltage Ranges,” IEEE Transactions on Power Electronics , Vol. 27, No. 1, pp. 189-200, Jan. 2012.
... voltage ranges and power levels. It also provides up-anddown conversion, and requires little energy storage which allows for excellent transient response. Unlike conventional quasi-resonant and multi-resonant converters [3], [4], no bulk inductor is used and the converter operates at fixed frequency ...
... voltage ranges and power levels. It also provides up-anddown conversion, and requires little energy storage which allows for excellent transient response. Unlike conventional quasi-resonant and multi-resonant converters [3], [4], no bulk inductor is used and the converter operates at fixed frequency ...
Advances in Natural and Applied Sciences
... (Nilsson, 1995; El-Sadek et al., 1997; Mihalič and Papič, 1998; Oliveira et al., 1999; Fang and Ngan, 2000; Hingorani et al., 2000; Kazemi and Sohrforouzani, 2006; Taher et al., 2010; Nguimfack-Ndongmo et al., 2014; Zamora-Cárdenas et al., 2014). Paper (Nilsson, 1995) discusses that the AC transmiss ...
... (Nilsson, 1995; El-Sadek et al., 1997; Mihalič and Papič, 1998; Oliveira et al., 1999; Fang and Ngan, 2000; Hingorani et al., 2000; Kazemi and Sohrforouzani, 2006; Taher et al., 2010; Nguimfack-Ndongmo et al., 2014; Zamora-Cárdenas et al., 2014). Paper (Nilsson, 1995) discusses that the AC transmiss ...
MAX1856 Wide Input Range, Synchronizable, PWM SLIC Power Supply General Description
... input-to-output voltage ratio and the transformer’s turn ratio. The current-mode feedback loop regulates peak inductor current as a function of the output error signal. At light loads, the controller enters Idle Mode. During Idle Mode, switching pulses are provided only as necessary to supply the lo ...
... input-to-output voltage ratio and the transformer’s turn ratio. The current-mode feedback loop regulates peak inductor current as a function of the output error signal. At light loads, the controller enters Idle Mode. During Idle Mode, switching pulses are provided only as necessary to supply the lo ...
ppt
... if either of the input voltages are high; otherwise output voltage low. Output voltage is high if the input voltage is low; otherwise output voltage high. ...
... if either of the input voltages are high; otherwise output voltage low. Output voltage is high if the input voltage is low; otherwise output voltage high. ...
AN2951
... line represents the envelope of the peak inductor current. As clearly noted, the shape is sinusoidal as required, in order to have a high power factor. This is a consequence of the Ton modulation carried out by following the output of the multiplier Vcsref (see Figure 3).The dash-dot line represents ...
... line represents the envelope of the peak inductor current. As clearly noted, the shape is sinusoidal as required, in order to have a high power factor. This is a consequence of the Ton modulation carried out by following the output of the multiplier Vcsref (see Figure 3).The dash-dot line represents ...
Voltage Source Inverter Drives and the use of Power
... however the energy is “trapped” by the reactor and the net surge voltage seen at the drives input terminals is significantly reduced. In addition to the use of line reactors, the placement of the correction capacitors should be as far away as possible from the VFD. Typical wiring impedance can be in ...
... however the energy is “trapped” by the reactor and the net surge voltage seen at the drives input terminals is significantly reduced. In addition to the use of line reactors, the placement of the correction capacitors should be as far away as possible from the VFD. Typical wiring impedance can be in ...
MAGNE-SONICS® SERIES 200 Vibrating tuning fork Liquid level
... (typically low alarm) or from dry to wet (typically high alarm). You may also select a time delay from 0.3, 1, 3, 10, or 30 seconds. A magnetic test point is on the side of the housing, allowing the user to perform a functional test of the Squing 2. By touching a magnet on the target the Squing 2 ou ...
... (typically low alarm) or from dry to wet (typically high alarm). You may also select a time delay from 0.3, 1, 3, 10, or 30 seconds. A magnetic test point is on the side of the housing, allowing the user to perform a functional test of the Squing 2. By touching a magnet on the target the Squing 2 ou ...
in a single component
... the MA6900 to always deliver all of its rated 200 Watts per channel. Whether your speakers are 8, 4 or 2 Ohms, the exclusive McIntosh output autoformer ensures that you will always get all of the power that you pay for. The preamp section of the MA6900 utilizes encapsulated switching, which reduces ...
... the MA6900 to always deliver all of its rated 200 Watts per channel. Whether your speakers are 8, 4 or 2 Ohms, the exclusive McIntosh output autoformer ensures that you will always get all of the power that you pay for. The preamp section of the MA6900 utilizes encapsulated switching, which reduces ...
Slides
... primary and secondary windings are coupled magnetically and electrically. This results in lower cost, and smaller size and weight. The key disadvantage is loss of electrical isolation between the voltage levels. Hence autotransformers are not used when a is large. For example in stepping down 7160/2 ...
... primary and secondary windings are coupled magnetically and electrically. This results in lower cost, and smaller size and weight. The key disadvantage is loss of electrical isolation between the voltage levels. Hence autotransformers are not used when a is large. For example in stepping down 7160/2 ...
Design_Considerations_for_High_Step
... contributor is the conduction losses especially for low output voltages. As the MOSFET conducts current for the major part of duty cycle. Switching losses in the low side MOSFET are practically negligible, since Q2 switches on and off with a diode drop across it. Conventional model which is commonly ...
... contributor is the conduction losses especially for low output voltages. As the MOSFET conducts current for the major part of duty cycle. Switching losses in the low side MOSFET are practically negligible, since Q2 switches on and off with a diode drop across it. Conventional model which is commonly ...
GY3512171221
... technology up to several hundred megawatts. Although relatively low switching frequency operation of high-power converters (9–15 times the line frequency) is desirable, it makes them sensitive to power network imbalances when they may be needed the most. Today, the most promising market for HVDC tec ...
... technology up to several hundred megawatts. Although relatively low switching frequency operation of high-power converters (9–15 times the line frequency) is desirable, it makes them sensitive to power network imbalances when they may be needed the most. Today, the most promising market for HVDC tec ...
3B30 数据手册DataSheet 下载
... programmed (Models 3B30-00 and 3B31-00) via user supplied resistors inserted in the optional AC1310 plug-on ranging card. Internal low-pass filtering with a 4Hz cutoff (-3dB) two-pole Butterworth filter enhances both 60dB normal-mode and 160 dB common-mode rejection at 50/60 Hz, enabling accurate me ...
... programmed (Models 3B30-00 and 3B31-00) via user supplied resistors inserted in the optional AC1310 plug-on ranging card. Internal low-pass filtering with a 4Hz cutoff (-3dB) two-pole Butterworth filter enhances both 60dB normal-mode and 160 dB common-mode rejection at 50/60 Hz, enabling accurate me ...
Displacement and Position Sensing
... output. The amplitude of the input voltage controls two stable output states of a shaper circuit. The shaper output feeds several gates, which in turn generate the pulses that mark the encoder’s zero-signal crossings. The circuits also sense whether channel A leads or lags channel B to provide direc ...
... output. The amplitude of the input voltage controls two stable output states of a shaper circuit. The shaper output feeds several gates, which in turn generate the pulses that mark the encoder’s zero-signal crossings. The circuits also sense whether channel A leads or lags channel B to provide direc ...
AMP03 数据手册DataSheet 下载
... As an example, the AMP03 is ideal for performing either addition or subtraction of two signals without using expensive externally matched precision resistors. The large common-mode rejection is made possible by matching the internal resistors to better than 0.002% and maintaining a thermally symmetr ...
... As an example, the AMP03 is ideal for performing either addition or subtraction of two signals without using expensive externally matched precision resistors. The large common-mode rejection is made possible by matching the internal resistors to better than 0.002% and maintaining a thermally symmetr ...
FSL138MRT Green-Mode Fairchild Power Switch (FPS™) for High Input Voltage
... an unexpected abnormal event. In this situation, the protection circuit should trigger to protect the SMPS. However, even when the SMPS is in normal operation, the overload protection circuit can be triggered during the load transition. To avoid this undesired operation, the overload protection circ ...
... an unexpected abnormal event. In this situation, the protection circuit should trigger to protect the SMPS. However, even when the SMPS is in normal operation, the overload protection circuit can be triggered during the load transition. To avoid this undesired operation, the overload protection circ ...
Using Thyristors in Heating Applications
... Significant neutral currents can flow in 4-wire 3-phase thyristor controlled circuits, even when the load is nominally balanced. For example, if a burst fire thyristor or solid state relay is fitted in each line but the firing is not synchronised, then the return current flows through the neutral. I ...
... Significant neutral currents can flow in 4-wire 3-phase thyristor controlled circuits, even when the load is nominally balanced. For example, if a burst fire thyristor or solid state relay is fitted in each line but the firing is not synchronised, then the return current flows through the neutral. I ...
Poster_TWEPP08a4
... Individual time setting for each LED in range of 400 ns with 1 ns step. PIN diode with amplifier is used for monitoring the LED stability itself. Control Logic FPGA is placed on a mezzanine card and equipped with radiation tolerant ACTEL pro-ASIC chip APA300. Memory of the scanning algorithm FPG ...
... Individual time setting for each LED in range of 400 ns with 1 ns step. PIN diode with amplifier is used for monitoring the LED stability itself. Control Logic FPGA is placed on a mezzanine card and equipped with radiation tolerant ACTEL pro-ASIC chip APA300. Memory of the scanning algorithm FPG ...
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.