The coupling of the phase inverter and power tubes is also important, since certain types of coupling arrangements ( e . g . transformer coupling ) can drive power tubes to class AB2, while some other types can't.
12.
In a transformer coupled stub, the length of the stub cable should not exceed, but this may be exceeded " if installation requirements dictate . " The coupling transformer has to have a turns ratio of 1 : 1.41 ?3.0 percent.
13.
The " Chardack-Greatbatch " pacemaker used Mallory mercuric oxide-zinc cells ( mercury battery ) for its energy source, driving a two transistor, transformer coupled blocking oscillator circuit, all encapsulated in epoxy resin, then coupled to electrodes placed into the myocardium of the patient's heart.
14.
Electric machines with a transformer circuit topology, such as induction machines, induction doubly-fed electric machines, and induction or synchronous wound-rotor doubly-fed ( WRDF ) machines, exhibit very high bursts of torque because the emf-induced active current on either side of the transformer oppose each other and thus contribute nothing to the transformer coupled magnetic core flux density, which would otherwise lead to core saturation.
