Abstract:
The device has the function of desoldering electronic components from an electronic card or other support and comprises a handpiece (3) having a tip (23) with a suction hole (27) in communication with a first suction pipe (31), which intersects a second pipe (33) for pressurized-air, oriented with respect to the first pipe (31) in such a way that the flow of air under pressure coming from said second pipe (33) generates a negative pressure in said hole; the first pipe (31) terminates in a filter (41) set on the side opposite to said suction hole.
Abstract:
Described herein is a transformer comprising: a bobbin (5) on which there are formed at least two windings of the transformer; on said bobbin, two sets of seats (7A, 7B) for two corresponding sets of terminals (9A, 9B), to which the ends of the wires (F1; F2) forming the windings are electrically connected; a ferromagnetic core (3) defining a magnetic circuit and developing around the bobbin and through it. There are further provided two insulating elements 15 applied to the bobbin in positions corresponding to said two sets of terminals for separating the terminals electrically from the ferromagnetic core.
Abstract:
A power circuit of a plasma display (3) comprising a resonant converter (9) is described. A current control loop (25) and a voltage control loop (37) arranged between the load applied to the converter and the converter itself are also described; the current control loop and the voltage control loop control the working frequency of the converter.
Abstract:
The circuit for firing and supplying a discharge lamp, comprises:
a load circuit (10), with at least one discharge lamp (L); means (7, 9) for supplying the said discharge lamp; in parallel with the said lamp (L), a circuit comprising at least one arrangement of capacitors (17, 21) and an inductive impedance which can be varied in a controllable manner in order to modify the value of the total impedance in parallel with the said lamp.
Abstract:
Equipment for the generation of a stabilized high direct voltage is described, and comprises: a step-up transformer (2) whose primary is supplied with a direct voltage and which is designed in such a way as to have dispersed inductances and parasitic capacitances which cause a resonance effect on the opening of the primary; rectifying means (3) to rectify the voltage at the terminals of the secondary winding of said step-up transformer (2); a switching means (11) which, when in the closed condition, connects the primary winding of said step-up transformer (2) to ground; and means (6, 7, 8, 9) of controlling the opening and closing of said switching means (11).
Abstract:
The electric-power supply comprises an electronic card (S) with at least one rectifier and one output line (13) of said rectifier. The output line comprises at least one first bar (31) made of conductive material, terminating with one first output end (31A), and at least one second bar (41) made of conductive material, terminating with one second output end. The two output ends form the positive (11) and negative (15) output poles of the power supply for connection to a load (Z). There are further provided means of electrical and mechanical connection for the first bar and the second bar to said card, and on at least one of said two bars is carried at least one electronic component of said rectifier.