JPS6059974A - Converter - Google Patents

Abstract

PURPOSE:To enable to vary the secondary side voltage while the phase difference is held when the primary side voltage is constant by winding a positively connected input side winding, reversely connected output side sinding, and a control winding on two annular cores. CONSTITUTION:U-shaped cores A1, A2 and B1, B2 are opposed t form annular cores A, B, the primary windings n1, n1' are positively connected in series, connected to an input power source Ei, the secondary windings n2, n2' are reversely connected in series to obtain an output voltage V2 through a capacitor C1, control windings n3, n3' are reversely connected in series, connected through a variable resistor R to a control power source Ed to form a converter. Accordingly, the magnetic resistance of the output winding Nb is modulated by an input side magnetic flux phia to generate parametric oscillation by a capacitor C1 to establish an output voltage V having a phase difference of 90 deg., and a magnetic flux phib is controlled by the resistor R to vary the output voltage V2.

Description

[Detailed Description of the Invention] Industrial Field of Use] A converter configured with a vertical magnetic core, an orthogonal magnetic core, or a two-core type in a planar circuit has a phase difference due to IJ sock vibration, and is used in a constant voltage circuit. It is a well-known fact that they are widely used as transmitters, transmitters, and frequency dividers.

The present invention relates to a two-iron core type converter having both a parametric circuit and a fero-resonant circuit at the same time, and in particular, it has a control winding, and when the single-phase input voltage on the primary side is constant, the voltage flowing through the control winding is The present invention relates to a converter that can freely vary the single-phase output voltage on the secondary side while maintaining the phase difference by changing the direct current.

[Prior art]

The present inventors have developed a phase number converter using a magnetic three-dimensional circuit.
A patent application filed in 1983 for a converter for single-phase to two-phase and single-phase to three-phase use, which can freely vary the output voltage without using active elements.
030399 and Japanese Patent Application No. 58-094445.

[Purpose of the invention]

The present invention can convert single-phase AC to single-phase AC by changing the frequency, and when the single-phase input voltage on the primary side is constant, the single-phase output voltage on the secondary side can maintain the phase difference. ! The purpose of this invention is to provide a converter that can be freely varied.

[Structure of the invention]

The present invention which achieves the above objects is the first. As shown in the second diagram, the same number of turns n1 are applied to the two annular magnetic cores A and H, respectively.
= n, ' are connected positively in series to form the input side winding N to which the single-phase input voltage Vin is applied, and the same number of turns n, applied to the two annular magnetic cores A and B, respectively. ”n
The two windings 2' are reversely connected in series to form an output winding N, and a capacitor C1 is connected in parallel to this output winding Nb, with both ends of the capacitor C1 serving as output terminals.
Furthermore, the same number of turns n3'''n3' on the two annular magnetic cores A and B
The two windings are connected in reverse in series to form a control winding N through which a DC control current id flows.

[Configuration of Example]

The configuration of one embodiment of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram of its configuration, FIG. 2 is a circuit diagram thereof, and FIG. 3 is an explanatory diagram showing the shape and dimensions of the U-shaped magnetic core used in the embodiment.

U-shaped magnetic core, A2. B1. B2 is a laminated iron core with length t-107mm, width W=20mm, height h=58mm, thickness t=8mm, and distance between arms f=92wn, and may be a ferrite core.

One annular magnetic core A is formed by joining two U-shaped magnetic cores at both ends of 1+ A2 to each other. Another annular magnetic core B is formed in the same manner. The annular magnetic cores A and B may be formed of two U-shaped magnetic cores, and a 0-shaped magnetic core can be used.

For these two annular magnetic cores A and B, 7 Ormar wires with a diameter of 05 cm are used, and the same number of turns is 11 = 11' = 250
Two windings are made, and these are positively connected in series to form an input-side winding block, and a single-phase input power source E1 is connected to this.

Similarly, the same four numbers n2 = n2' = using Formal wires with a diameter of 0.5 for each of the two annular magnetic cores A and B.
Two windings of 250 turns are connected, and these are connected in reverse in series to form the output side winding.A capacitor C1 is connected in parallel to this output side winding, and both ends of the capacitor CI are connected to the output terminals. shall be.

Furthermore, the same number of turns n3 g n3' = 27 using Formal wires with a diameter of 0.5 mm for the two annular magnetic cores A and B, respectively.
Two windings with zero turns are made, and these are reversely connected in series to form a control winding Na, and a series circuit of a DC control current and a variable resistor R is connected in series to this control winding Na.

[Effect of the embodiment]

Next, its effect will be explained. When a single-phase input voltage Vln is applied to the input-side winding N by the single-phase input power supply E and an alternating current is caused to flow, the input-side winding and the output-side winding Nb are applied to the annular magnetic cores A and B, respectively, as shown in FIG. Magnetic flux φ6. φb
occurs. This magnetic flux φ1. φb is magnetically coupled and represents an independent magnetic path.

In other words, in a normal transformer, transformer action, that is, induced voltage is generated on both the primary and secondary sides, but this is caused by magnetic coupling between the primary and secondary 11, and the primary side ,2
The magnetic flux on the next side is in phase. Therefore, the voltage is naturally in phase, but in the case of the present invention, the output side is connected in reverse, so the induced effects of the transformer on the secondary side cancel each other out, so there is no need to consider magnetic coupling. Since it is good, the magnetic flux φ1 on the primary side and the secondary side. Since φb has a phase difference of 90 degrees, it is considered that the magnetic paths are independent.

However, since the annular magnetic core used is shared, the magnetic resistance of the output winding Nb is modulated by the input magnetic flux φa, and the output inductance is also modulated accordingly. Line fan and capacitor C! As a result, parametric oscillation occurs, and an output voltage 2 having a phase difference of 90 degrees with respect to the single-phase input voltage Vin is established. To adjust only the value of the twisted output voltage v2 that maintains this 90 degree phase difference, an independent magnetic path on the output side, that is,
It is only necessary to adjust the magnetic flux φb, and for that purpose, a DC control current 1d is applied to the reversely connected control winding Nd by a DC control current source.
The magnetic flux φd generated in each of the annular magnetic cores A and H can be changed by controlling the DC control current 1d with and through the variable resistor R. If we do as shown in B, in a certain half cycle, the magnetic flux of the annular magnetic core A becomes the difference between φb and φd, as shown by the arrow in Figure 1, and becomes unsaturated, and the magnetic flux of the annular magnetic core B becomes the sum of φb and φd. In the next half cycle, on the contrary, the annular magnetic core A is saturated and the annular magnetic core B is unsaturated.This is repeated every half cycle from now on,
By controlling the magnetic flux, the output voltage v2 is controlled.

Next, the relationship between the DC control current id and the output voltage v2 will be described.

1st. The single-phase input voltage Vj is applied to both ends of the input winding in Figure 2.
n is applied, and a capacitor Ct is connected across the output winding Nb.
= Connect 275μF. Next, the single-phase input voltage Vin
Gradually increase the dove. Parametric oscillation occurs near =34V, and a sinusoidal output voltage v2 having a phase difference of 90 degrees with respect to the single-phase input voltage Vln is established. Figures 4 and 5 show the input voltage Vin and output voltage, respectively.
FIG. 2 is a waveform diagram and a vector diagram of FIG.

Further, FIG. 6 is a characteristic diagram showing the relationship between the input voltage Vin and the output voltage 2. As can be seen from Fig. 6, the present invention is a converter with constant voltage characteristics, and even if the input voltage is a distorted waveform, the output voltage waveform is a sine wave (see Fig. 4), and it is further protected against overload tanks. It has drooping characteristics. Therefore, even if the output side is short-circuited, the oscillation will simply stop and there will be no problem with the circuit.

The present invention takes advantage of these advantages and provides annular magnetic cores A,
A control winding Na is connected to H, a series circuit of a DC control power source and a variable resistor R is connected to both ends of the control winding Na, and the DC control current 1d is varied while gradually changing the variable resistor R, thereby sequentially varying the output voltage V2. It is something that makes you FIG. 7 shows the characteristics at that time, which is the relationship between the DC control current 1d and the output voltage v2 when v1□-35V is constant. As is clear from FIG. 7, it can be seen that when ld changes from 0.4 to 1.75 At, the output voltage v2 changes from 35V to 6V. Figure 8 1d Vln = 3
This shows the input voltage waveform versus output voltage waveform when the voltage is constant at 5V and Id = 1.2A, and it can be understood that the output voltage fluctuates while the phase difference is maintained at 90 degrees.

Furthermore, it was confirmed through experiments that the output voltage at double frequency can also be varied by making full use of the control current.

〔Effect of the invention〕

As is clear from the above description, the present invention provides the following effects.

■The output voltage can be changed freely by 9 degrees while maintaining the phase difference. ■By connecting a two-phase servo motor to the input and output windings, the rotation and rotation can be controlled. (2) The structure is inexpensive because it can be constructed using the same magnetic core. ■.

No active elements are used. (2) Since it has overload protection and drooping characteristics, even if the output side is shorted, oscillation will simply stop and the circuit will not be affected at all.

■The output voltage waveform is good.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, Fig. 2 is its circuit diagram, Fig. 3 is an explanatory diagram showing the shape and dimensions of the U-shaped magnetic core used in the embodiment, Figs. 4 and 5. are waveform diagrams and vector diagrams of input voltage and output voltage, respectively, Figure 6 is a characteristic line diagram showing the relationship between input voltage and output voltage, and Figure 7 is a diagram of DC control current vs. output voltage when the input voltage is constant. The characteristic diagram, FIG. 8, is a waveform diagram of the input voltage and output voltage when the input voltage and DC control current are constant. A, B......Annular magnetic core, General...Input side winding, Nb...Output side winding, Nd...Control winding, EI...... Single phase input power supply, C1...Capacitor, Ed...DC control power supply, R...
Variable resistance.

Claims (1)

[Claims] The same number of turns n1 applied to the two annular magnetic cores A and H, respectively.
The two windings of =nl' are positively connected in series to form the input side winding Na to which the single-phase input voltage vin is applied, and the same number of turns n2 = n applied to the two annular magnetic cores A and B respectively.
The 26 windings of 2' are connected in reverse in series to form an output side winding, and a capacitor C1 is connected in parallel to this output side winding, with both ends of the capacitor CI serving as output terminals. □ has two annular magnetic cores A, H has the same number of turns n3 ”' n3
A converter configured by connecting two windings in series in reverse order to form a control winding Na through which a DC control current 1d flows.