Power supply design examples, high

This design example purposely avoids the use of a highly integrated buck controller IC. It would be instructional to show the selection and design process involved in a switching power supply. Refer to Figure 3-65... 

Because of thermodynamic and electrochemical conventions, standard potentials are defined in the direction of reduction, independently of the respective chemical stabilities of the molecules involved. Thus for the oxidation of toluene to its cation radical, E° refers to the reduction of the highly unstable cation radical into the highly stable toluene. To overcome such a priori chemical nonsence, E is frequently designated as the standard oxidation potential of toluene for example. However, such a term should not be accepted according to canonical rules because it formally implies that the cell now operates in a driven mode, that is, is connected to an external power supply [19]. Thus in this chapter we prefer to use the denomination standard reduction potentials, rather than the usual temi standard potential, as a reminder of the E° definition, although such as expression is basically a pleonasm. 

DTT systems can be designed to meet high reliability goals by providing redundancy for power supplies, inputs, outputs and final elements. For example, consider the following ... 

In common with other power system equipment, motors need to be derated to suit a high ambient temperature. Equipment that is manufactured in America, UK and Europe is usually based on a maximum design temperature of 40°C. For higher ambient temperatures, e.g. 50°C as found in the Middle East and Ear East, the continuous duty output power and supply current would need to be reduced. The continuous duty is that as defined as type SI in IEC60034 part 1. International standards recommend performance and design criteria suitable for 40°C. Although most of these standard requirements will apply to ambient temperatures above 40°C there may be some addition restrictions to apply. In particular aspects of full-load current, duty, radiation of heat loss and outer surface temperature will need to be considered, see for example IEC60034 part 1 clauses 11 and... 

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