SU479205A1 - Frequency doubler - Google Patents

Description

The proposed doubler can also be performed in a multi-phase execution, then a multi-phase primary winding is placed on the stator, which provides a rotating magnetic field, and the secondary windings will have a phase for each phase similar to the secondary side of the circuit shown in FIG. one.

The device works as follows.

In the single-phase version with the input to the input of a sinusoidal voltage L / i with a frequency of / 1 (Fig. 2a), a rotating magnetic field is produced in the transducer magnetic circuit. This zero induces in the working windings and windings of the control emf. the time trend shown in FIG. 2 (b, c, d, d). The working windings are connected alternately to the output terminals of the doubler by means of keys 9, 10 (to the load). The switching times of these windings are determined by the moment of transition through the "zero voltage of the control windings.

In the positive half-period of the control voltage Lyi, the former 11 generates a control signal f / v, which opens one of the thyristors of the key 9 with a positive pulse, and a second thyristor of the same key opens with a negative pulse. Thus, through the public key 9 during the positive half-period of the f / yi pairing, the voltage U 2 acts on the output of the working winding 5. During the negative half-period of the control voltage Uyi, the key 9 is closed.

During the positive half-period of the control voltage, the processes in the working winding 6, the wrench 10 and the driver 12 proceed similarly. Thus, at the output of the converter, we have voltage Uz of doubled frequency.

In the case of a three-phase driver, with voltage applied to its input from a three-phase network, the processes occurring in each phase are similar to the processes described above.

Subject invention

A frequency doubler containing the magnetic circuit of an alternating current mash in whose slots the primary and secondary windings are located, characterized in that, in order to increase the efficiency, to improve the shape of the output voltage curve and simplify, the secondary windings are made in two sections with a number of pole pairs twice the number of pairs of fields of the primary winding, and are connected to the output terminals through anti-parallel connected thyristors, the control circuits of which are connected to the formers fed from additional windings having th same number of pole pairs, as well as the primary winding.

Y ,, / ,.

and

-: / a.2