SU517118A1 - Frequency multiplier times - Google Patents

Description

(54) MULTIPLAYER OF FREQUENCY N TIME

one

A frequency multiplier is known n times, powered by a p-phase power supply with zero power, containing n valve chains connected at one end to the corresponding outputs and connected to a star in the other.

The proposed device differs from the known one in that the chain contains two counter-connected in series valves, at least one of which is a zener diode.

In addition, the proposed device differs from the well-known in that, in the case, the chains consist of two opposite-connected zener diodes, the level of which is equal to

and

V - V and

where Vfp is the amplitude value of the input signal, and in the case, it is equipped with an output transformer, the extreme primary view windings of which are connected to the specified chains, and the middle view of this winding is connected to the zero terminal of the power supply, the level

breakdown of zener diodes is equal to v / a

-2-Vj,

where Vm is the amplitude value of the input signal. This difference allows one to form the output waveform.

FIG. 1 is a schematic diagram of a frequency multiplier three times; in fig. 2a, b show, respectively, the diagoamma of the voltages of the three-phase power source and the voltage diagram of the tripled frequency; in fig. 3 - a schematic diagram of the frequency multiplier twice; in fig. 4a and b, respectively, of the phase and output voltage diagrams of the output frequency.

The device contains 1-6 zener diodes, 7-load, 8, 9, 10-clamps connected to the phase outputs of the three-phase power source, -11-clamp connected to the zero output of the power source. The level of the sample of all Zener diodes is the same and equal to Y - “g

2

where Vm is the amplitude value of the input signal.

The device works as follows. Under feed & at the input of a three-phase voltage frequency multiplier, each pair of counter-current zener diodes breaks down when the input signal reaches

Claims (3)

 Z for each positive and negative half-waves in all phases (see Fig. 2a, points 12, 13, 14, 15, 16, 17, 18, 19). At a decrease in the value of the input signal in each half-wave below the level. The pairs of counter-succession of connected Zener diodes are locked, from each half-wave of a multi-phase input signal into a neutral circuit with a load 7 (Fig. 1), passing only their parts lying above the level 20 V (f). On load 7 (Fig. 1), an algebraic summation of all these parts of the creep waves occurs, resulting in a threefold frequency signal being output from the output, the shape of which is close to sinusoidal (Fig. 2 b) o In the case of a frequency multiplication by two times (Fig. 3) the multiplier contains an output transformer 21 with primary semi-windings 22, 23 and secondary winding 24. Diodes 25, 26, 27, 28 are connected in opposite and in series with zener diodes 29, 30, 31, 32. To each phase input terminal 33, 34 are connected two pairs of diodes and zener diodes of the opposite direction and, and a primary primary is connected to the zero terminal 35 of the power supply. The breakdown level of the zener diodes is equal. The device operates in the same way as in the case of frequency multiplication by 3 times. Namely: when the voltage of the first phase reaches a positive polarity of magnitude 2, a breakdown of the Zener diode 29 occurs and a current flows through the half-winding 22 (FIG. 3). In the secondary winding 24, a signal of positive polarity appears, the shape of which, when the windings are equal, repeats the shape of the input signal (Fig. 4). When the input signal decreases below Jg V- -V V 2 v, Zener diode locks 29. Simultaneously, Zener diode 31 locks when the positive half-wave of the second phase reaches the value .. 2 (level 36 in Fig. 4 a). In this case, the current flows through the half-winding 23. The output signal changes the polarity to negative. When the negative half wave of the first phase occurs, the breakdown of the Zener diode 30 and the current flows through the half-winding 23. The output signal changes the polarity to positive. When stacking Shlitron 30 is locked, a breakdown of the Zener diode 32 occurs at a negative half-wave of the second phase, and a current flows through the half-winding 22. The output signal changes polarity, with this it has a frequency twice as large, with the output signal being close to a sinusoidal waveform. An additional advantage of the proposed multiplier is that its operation does not require the use of separate devices issuing control pulses. The simplicity of the proposed multiplier and the possibility of obtaining a practically undistorted output signal allows it to be used in automation devices, telemechanics, in measuring and computing equipment, in control systems. Claim 1. Frequency multiplier n times, powered from a n-phase power source with zero output, containing n valve chains connected to the corresponding outputs from one end and connected to the star in others, in order to improve the output curve the signal, the said chain contains two counter-connected, valves, at least one of which is a zener diode. 2. A frequency multiplier according to claim 1, characterized in that, in the case, the chain consists of two mutually connected zener diodes whose breakdown level is x / З V H-Y where Vm is the amplitude value of the input signal. 3. Frequency multiplier according to claim 1, characterized in that, in the case, it is equipped with an output transformer, the extreme outputs of the primary winding of which are connected to the specified chains, and the middle output of this winding is connected to the zero terminal of the power source, wherein the level of the zener diodes is 2 where Vm is the amplitude value of the input signal. //. i FIG. 2 JJ {2 Fig.Z a. W t FIG. four