Question

Difference between 120 and 180 degree conduction mode

Answer 1

When you see phase shift, you need to ask “What is the reference signal which is the 0 degree phase basis for any phase shift?” The reference HAS to be cyclical and repetitive, so that the start and end of a cycle can be identified, and THEN you can note the position half way through the cycle which means a 180 degree delay. If the shifted signal starts at this half way point, you can say it is 180 deg phase shifted.

A LOGIC inverter changes any logical high level to the logical low level and vice versa. There is no need for any cyclical repetition of this sort of digital waveform.

A POWER inverter changes a DC input to an AC output (of more or less sinusoidal form.)


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Answer 2

The reference HAS to be cyclical and repetitive, so that the start and end of a cycle can be identified, and THEN you can note the position half way through the cycle which means a 180 degree delay. If the shifted signal starts at this half way point, you can say it is 180 deg phase shifted.

Thermodynamics:

• It is learning of the connection 'tween heat, work, hotness, and strength. In broad agreements, thermodynamics handles the transfer of strength from individual place to another and from individual form to another.
• The key idea is that heat is a form of strength matching to a positive amount of machinelike work.Heat was not in an official manner acknowledged as a form of strength just before about 1798, when Count Rumford (Sir Benjamin Thompson), a British military engineer, seen that never-ending amounts of heat maybe create in the uninteresting of howitzer barrels what the amount of heat produce is equivalent to whole exhausted curving a blunt uninteresting form.

• Rumford’s scrutiny of the proportion middle from two points heat create and work accomplished lies at the company of thermodynamics. Another pioneer was the French military engineer Sadi Carnot, one made acquainted the idea of the heat-transformer phase and the law of reversibility in 1824.
• Carnot’s work worried the restraints on the maximum amount of work that maybe acquired from a energy weapon operating accompanying a extreme-hotness heat transfer as allure hidden motive. Later that of one hundred years, these plans were grown by Rudolf Clausius, a German mathematician and researcher, into the first and second regulations of thermodynamics, individually.

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