Pomoč pri prevodu tehničnega "štromarskega" besedil

Ker mi znanje tehničnega besedila dela velike preglavice bi nekoga lepo prosil, če bi mi lahko prevedel sledečo besedilo:

According to Fig.8a the MCS is implemented as an active current mirror [7] formed by a current measurement shunt RSH, an operational amplifier (OPA) O1 with feed-back path k_I ⋅RSH and a small-signal NPN transistor Q1. Due to its single-quadrant operation, the linear-mode power amplifier can be realized using only a single NPN power transistor Q2 in emitter-follower configuration driven by OPA O2. In the final prototype (Fig.8b) the module’s short circuit current is programmed by the PNP-transistor current source feeding the diode chain (16x 1N4148) to (5.6V−0.6V)/1.5kΩ = 3.33mA leading to ISC = 3.33A as a consequence of the 1:1000 current mirror(k_I = 1mA/A, defined by the resistor ratio 0.1Ω/100Ω). For the power transistor a Darlington-type (TIP142) is used which can be driven directly by O2 due to its high current gain. In order to protect Q2 in case of short circuit, a current limiter (BC547B) is added to its base-emitter path. As power supply VB no more laboratory equipment is necessary, a simple industrial SMPS will be adequate. It has to be considered, however, that the selected OPA LM358 (although allowing ground-referenced current measurement as needed for O1) shows a noticeable positive supply voltage margin (≈3V). This effect is further enhanced by the base-emitter voltage of Q2 (≈1.2V due to the Darlington principle). Consequently, a supply voltage of VB ≈ 26V is required to achieve the aimed VOC = 21.7V. The application of a true railto-rail OPA in connection with a compound Darlington transistor opens a possibility for reducing this voltage “headroom” which worsens the efficiency of the circuit. Alternatively, also a separate (increased) power supply for the OPA would be feasible as known, e.g., from audio power amplifiers, complicating, however, the SMPS design. The driving stage O2 is configured as a differential amplifier in order to suppress the 3V “base voltage” of the diode chain provided by the zener diode C3V0 and which is required to guarantee sufficient collector-emitter voltage for Q1. The voltage gain of the power amplifier is set to kV = 2 by the resistor pairs 33kΩ/ 66kΩ. With this, 16 pcs. of 1N4148 have been found adequate for achieving VOC = 21.7V. Finally, it should be mentioned that the 22nF capacitor across the diodes and, especially, the 220μF electrolytic capacitor at the output are necessary to prevent parasitic ringing.
The measurement values taken from the series-mode laboratory prototype simulator (realized similar as shown in Fig.6d for the amplified diode concept) unfortunately match the real KC50T module in an only suboptimal manner (Fig.9a). On contrary to ISC and VOC (which are fixed by the dimensioning) a noticable deviation exists near the MPP region. Obviously this is a drawback of modeling a solar cell by a small-signal diode like 1N4148 at low current rates. Furthermore, also the efficiency behavior of the series-mode simulator is somewhat disappointing. As indicated in Fig.9b good efficiency rates appear in the “no-load region” V ≈ VOC (for all series-mode regulators η increases proportional to the output voltage ηSER = V/VB). However, already near MPP the efficiency of the shunt-mode simulator significantly exceeds the series-mode circuit. Remark: For common PV modules VMPP ≈ 0.75VOC is valid typically. Assuming about 20% voltage headroom (i.e., VB = 1.2VOC) gives an efficiency of only 0.75/1.2=62% at MPP in comparison to approximately 85% for the shunt-mode simulator. For improving ηSER at lower ratings of V, it would be thinkable to pre-regulate VB to lower the voltage drop across Q2 as is known from advanced linear power amplifiers [8]. Due to the high effort, this solution shall not be pursued here, however.

Že v naprej se zahvaljujem

HVALA

Ja, some one should do all the work for you

Imaš težave s kakšno specifično besedo ali besedno zvezo?

V napačno rubriko sem napisal (HVALA :)). Imam probleme z povezovanjem tehničnih besed v stavkih, Upam pa da mi bo res kdo lahko tole prevedel, če si bo vzel toliko časa.

Zastonj ti tega ne bo nihče prevedel, za 50 evrov boš pa sigurno našel kakšnega prevajalca.

O.