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Power Electronic
Transformers and Inductors for Power Electronics: Theory, Design and Applications
48 SOLVED PROBLEMS
Question: 10.9
Design the filter inductor for a 25 W load at 25 V rms input at 50 Hz that will maintain conduction down to 10% of rated load. ...
Verified Answer:
The DC output voltage is:
V_{d c}=\frac{(2)...
Question: 10.8
The inductance characteristic of the inductor in Example 10.3 satisfies the criteria for the inductance-current pairs in Example 10.7. The buck converter in Figure 10.23 has the specifications given in Table 10.6. Simulate the circuit and plot the inductor current for each of the following values ...
Verified Answer:
The circuit of Figure 10.23 has been simulated for...
Question: 10.7
The voltage and current at the maximum power point in a 200 W solar panel are listed in Table 10.5, along with the maximum power for various level of solar insolation. Calculate the internal resistance of the panel for each level of solar power, the duty cycle of the buck converter for impedance ...
Verified Answer:
The internal resistance is given by Equation 10.39...
Question: 10.6
The rectifier in Figure 10.12 has the specifications given in Table 10.4. Determine the harmonics when the SAG inductor of Example 10.5 is used at the input. For simulation purposes, the circuit is represented in Figure 10.19; the input represents the rectifier output. ...
Verified Answer:
PSPICE and other simulation packages are based on ...
Question: 10.5
An inductor constructed with an EI assembly EI42 (corresponding to IEC YEI 1-14), with M530-50A material as described in Example 10.1, was constructed with G = 1.0 mm, g = 0.2 mm, lc = 8.4 cm, Ag = 2.027 cm², d = 1.4394 cm and N = 365 turns. Calculate the inductance L and the effective inductance ...
Verified Answer:
For low values of current before the onset of satu...
Question: 10.4
An inductor constructed with an EI assembly EI42 (corresponding to IEC YEI 1-14) with M530-50A material described in Example 10.1 was constructed with g1 = 0.39 mm, Ag1 = 1.036 cm², g2 = 0.69 mm, Ag2 = 1.036 cm², core length lc = 8.4 cm and with N = 365 turns. Calculate the inductance L and the ...
Verified Answer:
For low values of current before the onset of satu...
Question: 6.5
Calculate the leakage inductance for the windings in the pot core shown in Figure 6.19 with the dimensions given in Table 6.2. ...
Verified Answer:
The MLT is based on the average radius of the coil...
Question: 6.4
Push-pull Converter Calculate the optimum thickness for the winding in the push-pull converter in Example 5.3. ...
Verified Answer:
In Example 5.3, there are six layers, p = 6, the d...
Question: 10.3
Consider a Micrometals toroidal iron powder core with 52/μ75 material. The initial permeability versus magnetic field intensity curve is given in Figure 10.5. ...
Verified Answer:
An inductor was constructed using a toroid with co...
Question: 10.2
An inductor constructed with an EI assembly EI42 (corresponding to IEC YEI 1-14) with M530-50A material, as described in Example 10.1, was constructed with g = 0.5 mm, core length lc = 8.4 cm, core cross-sectional area Ag = 2.072 cm² and with N = 365 turns. Calculate the inductance L and the ...
Verified Answer:
For low values of current before the onset of satu...
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