Electronic ballasts contain a small circuit board with a bridge rectifier, a filter capacitor and usually two switching transistors, which are often insulated-gate bipolar transistors.
12.
Also sometimes known by his name is the diode bridge rectifier circuit invented by Polish electrotechnician Karol Pollak and popularised by Leo Graetz in " Elektronische Zeitung " in 1897.
13.
This circuit is similar to a bridge rectifier, except that instead of the diodes facing " left " or " right ", they go " clockwise " or " counterclockwise ".
14.
In HVDC applications, a full-wave three-phase bridge rectifier or " Graetz-bridge " circuit was usually used, each valve accommodated in a single tank.
15.
It is also possible to replace the standard diode-bridge rectifier with a bi-directional IGBT switching device bridge mirroring the standard inverter which uses IGBT switching device output to the motor.
16.
Power is passed through a transformer which lowers the tension to about 1500V AC and a bridge rectifier controlled by thyristors rectify it into DC, which is then fed into the traction motors.
17.
A number of rectifier discs would need to be used in series to provide an adequate reverse breakdown voltage figure-a bridge rectifier for a 12V battery charger would often use 12 metal rectifiers.
18.
A variant of this is to use two capacitors in series for the output smoothing on a bridge rectifier then place a switch between the midpoint of those capacitors and one of the AC input terminals.
19.
When used in its most common application, for conversion of an alternating current ( AC ) input into a direct current ( DC ) output, it is known as a "'bridge rectifier " '.
20.
In such circuits control of the output current is required; this is sometimes achieved by replacing some of the diodes in a bridge rectifier with thyristors, effectively diodes whose voltage output can be regulated by switching on and off with phase fired controllers.
