Regulators

Regulator, otherwise called as Dimmer is a device which controls the speed of ceiling fan, the intensity of the lights etc. The voltage rating is 240V mostly. The product is mostly in white, grey and other colours. The available types of the product are inductive type, a resistive type, etc. It is generally used in homes, offices, educational institutes, and various other buildings.

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Detailed Description for Regulators

 

               A voltage regulator is designed to automatically maintain a constant voltage level. A voltage regulator may be a simple "feed-forward" design or may include negative feedback control loops. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages.

              In an electric power distribution system, voltage regulators may be installed at a substation or along distribution lines so that all customers receive steady voltage independent of how much power is drawn from the line.

Active regulators

          Active regulators employ at least one active (amplifying) component such as a transistor or operational amplifier. Shunt regulators are often (but not always) passive and simple, but always inefficient because they (essentially) dump the excess current not the load. When more power must be supplied, more sophisticated circuits are used. In general, these active regulators can be divided into several classes:

Linear series regulators

Switching regulators

SCR regulators

 

Transistor regulator

In the simplest case a common collector amplifier also known as emitter follower is used with the base of the regulating transistor connected directly to the voltage reference:

                                                           

Regulator with an operational amplifier

The stability of the output voltage can be significantly increased by using an operational amplifier:

                         

                                                                  

 

Measures of regulator quality

The output voltage can only be held roughly constant. The regulation is specified by two measurements:

Load regulation is the change in output voltage for a given change in load current (for example, "typically 15 mV, maximum 100 mV for load currents between 5 mA and 1.4 A, at some specified temperature and input voltage").

Line regulation or input regulation is the degree to which output voltage changes with input (supply) voltage changes - as a ratio of output to input change (for example, "typically 13 mV/V"), or the output voltage change over the entire specified input voltage range (for example, "plus or minus 2% for input voltages between 90 V and 260 V, 50-60 Hz").

                                             

 

 

 

                                                      

 

 


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