Regulated DC Power Supply

Wire the following circuit. The parts are listed in Table 6-2 on page 351. 

The Transient Analysis uses the sinusoidal voltage waveform when it performs the simulation. This circuit would not work if an AC Sweep were used. To set up a Transient Analysis, select PSpice and then New Simulation Profile from the Capture menus  

Enter a name for the profile and click the Create button. By default the Time Domain (Transient/ Analysis type is selected. 

Fill out the dialog box as shown below. Since each cycle takes 16 ms, I will run the simulation for 10 cycles or 160 

I jMortta Carlo/Wortt Case ParamaWc Swaap f Temperature (Swaap) 

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The dose distribution in potassium dithionate tablets along the beam of C and ions accelerated to 25 MeV was examined using the ESRI methods developed by Schlick et al. [63, 65]. Spectra were collected using an X-band spectrometer equipped with two Lewis coils powered by regulated DC power supplies to produce a variable field gradient up to 20 mT/cm applied along the direction of the tablets. Details of the experimental procedure can be found in an article by Gustafsson et al. [64], Information about the analysis is described in [63, 65]. 

An ESR imaging system can be built with small modifications of commercial spectrometers gradient coils fixed on the poles of the spectrometer magnet, regulated DC power supplies, and required computer connections. In most systems... 

Cell and Power Supply, An undivided cylindrical glass cell (lOOmL) fitted with a sacrificial cylindrical aluminum or magnesium bar (1 cm diameter) as the anode and a concentric cylindrical stainless steel grid (1.0 0.2 dm, surface area of the wires) as the cathode was used. A constant current (0.1 A, density 0.1 0.05 A.dm-2) was provided by a Sodilec EDL 36-0.7 regulated DC power supply which is very inexpensive compared to a potentiostat... 

An ESRI system can be built with small modifications of commercial spectrometers by, for example, gradient coils fixed on the poles of the spectrometer magnet, regulated direct current (DC) power supplies, and required computer connections [40,53,55]. Gradients can be applied in the three spatial dimensions, and a spectral dimension can be added by the method of stepped gradients. The spectral dimension is important when the spatial variation of ESR line shapes (as a function of sample depth) is of interest this situation will be described below, in the ESRI studies of heterophasic polymers. In most systems, the software for image reconstruction in ESRI experiments must be developed in-house. 

Regulated direct current (DC) power supplies designed for electrophoresis allow control of every electrophoretic mode. Constant voltage, constant current, or constant power conditions can be selected. Many power supplies have timers and some have integrators allowing runs to be automatically terminated after a set time or number of volt-hours (important in IEF). All modes of operation can produce satisfactory results, but for best results and good reproducibility some form of electrical control is important. The choice of which electrical parameter to control is almost a matter of preference. The major limitation is the ability of the chamber to dissipate the heat generated by the electrical current. 

Fig. 19. Circuit of a DC power supply with CC or CV. The output potential E0 is compared with a constant potential EB. This battery potential is first amplified (A) and then applied to the grid of the regulating valve T which maintained E constant but a little higher than the amplified potential Eg. When E0 or also the intensity /0 has a tendency to vary, either through a variation of the input potential E4 or of the resistance Rh, the changes are compensated by T, so that E0 or I0 remains constant. K is the amplification factor.

Figure 1.21. Schematic description of the sieve-based-device 1 sprayer 2 syringe pump 3 DC power supply 4 auxiliary gas flow regulator 5 N2 cylinder 6 sieve mounted on a stainless steel frame 7 screen 8 beam interceptor 9 sample holder.

The ion chemistry and electrical stability of a point-to-plane corona discharge (CD) ion source was described using a tandem mass spectrometer equipped with an atmospheric pressure source. This source was a continuous current-regulated discharge with a direct current (DC) power supply and danonstrated the regions of stability with potential and distance between the needle and plane. A sch atic overview of the mechanism of formation of ions in a CD is shown in Figure 4.1. 

A multistep inverter drives a combining transformer, which feeds the load. The general concept is illustrated in Fig. 10.147. The purity of the output sine wave is a function of the number of discrete steps produced by the inverter. Voltage regulation is achieved by a boost DC-to-DC power supply in series with the battery. Figure 10.148 and Figure 10.149 show two different implementations of single-phase units. Each system uses a number of individual inverter circuits, typically three or multiples of three. The inverters are... 

The interface between the renewable source and RFC system must match their current and voltage, which differ for solar and wind systems. Photovoltaic solar systems generate direct current, which may be used directly by the electrolyzer if their polarization curves are well matched, otherwise a DC/DC converter may be needed. Wind generators typically generate AC, so the interface must include an AC/DC inverter, similar to the electrolyzer s regulated voltage power supply. 

For current-controlled conversions, a current-regulated DC source (up to 50V and 2A, with voltage and current display) [175] or one or two car batteries (12 to 24V) with a volt and ampere meter [176] or a regulated AC power source with a rectifier are sufficient as the power supply. 

Two gallons of waste were filtered using a Whatman glass microfibre filter (GF/D 9.0 cm), and poured into the chamber. The electrodes were connected to a power supply, (B K Precision Model 1601 Regulated DC), supplying two volts and a current of about 100 mA. The pH of the solution was decreased to pH 3.6-3.8 with hydrochloric acid. 5-10 g of calcium chloride were added. The bath was agitated by a stirrer and the plating process was allowed to continue for 8 hours. 

Figure 1. Schematic of the apparatus (1) thermal conductivity cell detector, (2) column, (8) flow meter, (4) pressure regulator, (5) drying trap, (6) injection valve, (7) recording device (A) T.C. detector, (B) power supply, (C) recorder, (D) dc micro-voltmeter, (E) FM adaptor, (F) magnetic tape recorder...

RSW - Magnetic reed switch, SPST, NO, 1 amp TBL A - 4 position 30 amp or more DC terminal block TBL B - 3 position 30 amp or more DC terminal block TBL C - 6 position 10-20 amp DC terminal block TSW 1 - Electrolyzer power supply switch TSW 2 - Manual pump switch VR - LM 317T Voltage regulator... 

See Figure 13-2 for an example of how EMI suppression techniques are applied to dc-dc converters. We have shown an industry standard isolated brick (along with its external EMI filtering). The input to this particular module is a coarsely regulated 18 V-dc or -60 V-dc bus, forming part of a distributed power architecture for a data/telecom network. Its output is isolated and regulated (e.g. 3.3 V/50 A or 12 V/10 A etc). The -48 V-dc input is usually derived from an off-line telecom power supply (called a rectifier ). 

Voltage regulator That part of a power supply that accepts a filtered DC voltage and reduces, if not eliminates, the ripple, providing a continuous, smooth DC signal. 

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