Replacement of existing equipment Add-on (I have added additional equipment to my home) I am registering units installed by a prior home owner Country*--- Select Country --- Zip Code / Postal Code* State/Province*--- Select State --- Check here if you don't have an email address. Find My Company Information:(HVAC ID, MFG Account, Name, Address, Email, Phone, etc.)(If using more than one identifier, please use a comma in between values) Find Dealer Information:(Phone, Email, Address, Name, etc.)(If using more than one identifier, please use a comma in between values)(OR to select from a list by zip code)Enter Zip Code / Postal Code:Enter Radius (miles):--Select Radius-- Check here if you don't know the above dealer information. We found your company/dealer record(s) using the information you entered. The results appear below. We found the company/dealer record(s) using the information you entered. We could not identify a matching company/dealer record using the information you entered.

Please try different criteria or finish the registration by typing the name, phone number, and any other known dealership information and clicking “Next”.Please try different criteria or finish the registration by typing the name, phone number, and any other known dealership information and clicking “Next” Country--- Select Country --- Zip Code / Postal Code State/Province--- Select State --- Check here if your dealer isn't listedYou are hereHome » HomeBridge Firing Unit (AC)Implement six pulse firing unit with notch filters for three-phase thyristor bridgeexpand all in pageDescriptionThe Bridge Firing Unit (AC) block converts the firing angle, typically provided by a current/voltage controller, to pulses applied to the thyristor gates. The block uses notch filters on voltage measurement to remove voltage harmonics.The output of the block is a vector of six pulses individually synchronized with the supply voltage. The pulses are generated alpha

(firing angle) degrees after the zero crossings of the thyristor commutationThe figures show the synchronization of the six pulses for an alpha angle of 30 degrees and pulse width of 10 degrees. are generated at exactly 30 degrees after the zero crossings of the three line-to-line synchronization voltages. Two pulses (double-pulsing) are sent to each thyristor—a first pulse when the alpha angle is reached, and a second pulse 60 degrees later when the next thyristor is fired.Dialog Box and Parameters Network frequency (Hz)The frequency of the synchronization voltages, in hertz. usually corresponds to the frequency of the supply. is 60.Inputs and OutputsAlphaConverter firing angle.BctrlControl signal to disable or enable the output pulses.A, B, CThree-phase terminals of the supply.pulse_outGate pulses for the thyristor bridge.ExamplesThe Bridge Firing Unit (AC) block is used in the AC1 block of the Electric Drives library.References[1] Bose, B. K. Modern Power Electronics and AC