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Trailing edge dimmers (as opposed to leading edge, or triac dimmers) turn off the electrical load at the end, or trailing edge, of the AC input waveform. They control the power to the load by varying the duty cycle (the ratio of on time to on+off time) of the voltage to the load, the same as leading edge or triac dimmers. Cutting off the trailing edge of the waveform allows compatibility with electric loads that are either resistive or capacitive in nature (as opposed to leading edge dimmers which are compatible with resistive and inductive loads). Trailing edge dimmers are more complex than other dimmers, and are usually implemented using back-to-back power FETs (n-channel enhancement-mode MOSFETS with their source terminals connected together, the gates connected together, and the drain terminals acting as the two power terminals). The FETs have an intrinsic body diode which means they always conduct in one direction. Putting two FETs together as described allows current flow to be controlled in either direction (with no gate signal, both FETs are off, and the body diodes allow no current flow either. If one FET is gated on, the current can flow through that FET and the body diode of the other FET).
Trailing edge dimmers are designed to fade the voltage to zero rather than switch it abruptly off, by applying a resistance to create a ramp rather than a "cliff." This greatly reduces interfering electrical and radio emissions. It also increases the amount of heat dissipated, since the resistive period generates heat. Most trailing edge dimmers contain thermal monitors that can adjust the ramp if too much heat is being generated.
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What is the Importance of leading edge and trailing edge in radar pulse?
The leading edge of a radar pulse determines range accuracy. The trailing edge, along with pulse width, determines minimum range.
4027 master slave flip flop theory?
The 4027 master-slave filp-flop is a pair of CMOS edge triggered flip-flops connected in series. Assuming that you don't assert the set or reset inputs (which are overrides) the first flip-flop will follow the input on the leading edge of the clock, with the other following on the trailing edge.
What are trailing cables?
Trailing Cables are cables that are not secured in to a safe place. these cables often hazardous to to Animals and persons. eg. a pet dog bites an electrical cable and got shock to death or someone falling over cables crossing a room on the floor
What is a cutting-edge computer?
Anything that's called 'cutting-edge' is something which is at the forefront of current technology. What's cutting-edge today is unlikely to be cutting-edge soon because technological developments will have made it out of date.
What is an edge network?
An edge network is defined as "EDGE network, the data network supported by the first-generation iPhone." This something that would only apply to the line of "Apple" products.
What is the definition of trailing edge?
Trailing edge is the rear edge of a wing.
Where is the leading and trailing edge on a plane rudder?
When you look at a plane side-on. The left-most edge of the rudder attached to the fuselage is the leading edge whilst the right-most edge of the rudder is it's trailing edge.
What is the Importance of leading edge and trailing edge in radar pulse?
The leading edge of a radar pulse determines range accuracy. The trailing edge, along with pulse width, determines minimum range.
Prior to towing ramps may be installed on which edge?
Trailing edge
ALLERON Where is IT on an airplane?
The trailing edge of a wing
Is trailing an adjective?
It can be (trailing edge, trailing veil). It is the past tense and past participle of the verb (to trail, meaning to stream or follow behind).
What is TE MAC in weight and balance?
The term TE MAC stands for Trailing Edge Mean Aerodynamic Chord. It is the average distance between the leading and trailing edge of an aircraft's wing, taken at the trailing edge of the wing. This measurement is important for calculating the aircraft's balance and stability.
What is trailing edge?
A Craft Edge of a Wing. Air however passes over this portion of airfoil
What is a trailing edge?
A Craft Edge of a Wing. Air however passes over this portion of airfoil
Which part of the wing is known as flaps?
The trailing edge of the wing is the part that is referred to as the flaps.
Why the trailing edges of control surfaces are sharper than the leading edges?
The trailing edge is where the air flow comes together. The leading edge is where the air is diverted to produce the low pressure (top) and high pressure (bottom) to create lift.
What is a bute door?
It stands for "Bend Up Trailing Edge" and is prevalent on McDonald Douglas Aircraft.
