control in power electronic

... electric power conditioning are explained using a hypothetical generic power converter. Ac to dc, ac to ac, dc to dc, and dc to ac power electronic converters are described, including select operating ... and automation of industrial processes. Power conditioning involves both power conversion, ac to dc or dc to ac, and control. Power electronic converters performing the cond...

Ngày tải lên: 05/03/2014, 09:43

... electric power conditioning are explained using a hypothetical generic power converter. Ac to dc, ac to ac, dc to dc, and dc to ac power electronic converters are described, including select operating ... and automation of industrial processes. Power conditioning involves both power conversion, ac to dc or dc to ac, and control. Power electronic converters performing the cond...

Ngày tải lên: 16/03/2014, 08:20

... DIGITAL CONTROL IN POWER ELECTRONICS 1.3 TRENDS AND PERSPECTIVES From the above discussion, it will be no surprise if we say that we consider the increasing diffusion of digital control in power electronics ... explained, at first in the continuous time domain, and then in the discrete time domain. The issues related to PWM control modeling are fundamental for the correct for...

Ngày tải lên: 14/05/2014, 21:44

... the line. If the compensator can vary its admittance continuously in such a way as to maintain V m  E, then in the steady state the line is sectioned into two independent halves with a power ... resonant frequency equal to the power frequency, and since the damping in power systems is Fig. 3.19 Phasor diagram of symmetrical line. Power electronic control in electrical sys...

Ngày tải lên: 16/02/2014, 20:20

... thyristor. In the next section, we introduce a power electronic structure to control firing angle α of thyristor. 2. Power electronic structure for controlling firing angle α of thyristor 2.1. Controlling ... application of power electronic components for controlling in the above mentioned cases brings certain benefits. Comparing with the manual switching method or contac...

Ngày tải lên: 05/03/2014, 14:20

... standard concentration of insulin (Humulin R, Eli Lilly and Company, Indianapolis, IN, USA) was 100 units in 100 ml of 0.9% saline solution. In the standard insulin group, insulin infusion was started ... standard insulin group and 83 of 254 (32.7%) in the intensive insulin group. The mean calorie intake in 24 hours was 23.1 ± 12.7 kcal/kg in the standard insulin group and 25.5 ± 1...

Ngày tải lên: 25/10/2012, 10:35

... evaluated at baseline and after 12 weeks of training with three training sessions per week. The main findings are: Fasting glucose concentrations remind unchanged after training. The area under ... VE. In the present study we compared VE with the influence of strength training and a control group (flexibility training) on glycemic control in type 2 diabetes patients. Forty adult no...

Ngày tải lên: 26/10/2012, 10:04

... is avoided by introducing hysteresis in the control scheme as shown in Figure 3.35. 104 Practical Variable Speed Drives and Power Electronics 3.8 Gate controlled power electronic devices ... inverter increase, while those in the motor decrease. One of the most common techniques for achieving sine-coded PWM in practical inverters is the sine-triangle intersection me...

Ngày tải lên: 08/09/2013, 21:03

... changes in the load and in the input are important performance parameters in buck converters. Since the current in the inductor cannot change instantaneously, the transient response is inherently inferior ... switching power supplies continue to gain popularity. Switching power supplies could be as high as three times more efficient than linear power supplies and in some cases...

Ngày tải lên: 17/10/2013, 11:15

... find applications in ac machine control and uninterrupted power supplies, induction heating, etc. The resonant link inverter technology is still in the development stage for industrial applications. FIGURE ... 30.3 Power Supplies DC Power Supplies•AC Power Supplies•Special Power Supplies 30.4 Converter Control of Machines Converter Control of DC Machines•Converter C...

Ngày tải lên: 19/10/2013, 11:15