JP2003265625A - Positive and negative potential difference generation circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide potential therapy equipment with a simple mechanism where a function of differentiating the value of a potential between the case of a positive potential and the case of negative potential and a function of generating the same potential in both of the cases of the positive potential and the negative potential can be switched. <P>SOLUTION: Two coils for generating high voltage are provided at a transformer. Voltage obtained by full-wave-rectifying voltage generated by a pair of the coils or rectifying the voltage only in the case of positive polarity is generated and voltage generated by the other coil is superimposed to this by anti-phase or in-phase to make the peak level value of the positive potential smaller than or equal to that of the negative potential without changing the voltage of the negative potential. Further, by superimposing voltage obtained by dividing the rectified voltage, this circuit shows a similar effect. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positive / negative potential difference generating circuit of a potential therapy apparatus which is provided with a high voltage generating means, generates a high voltage, and places a living body in the high electric field for treatment. .

[0002]

2. Description of the Related Art Conventionally, this type of electric potential therapy device is a therapeutic device intended to normalize the inside of the living body by treating the living body in a high electric field of about 9 kVrms to treat stiffness and constipation. It is considered that the therapeutic effect is enhanced by making the positive potential lower than the negative potential, and that the effect is further enhanced by repeatedly applying a voltage having the same positive and negative potentials to the therapeutic potential.

As a conventional device for generating positive and negative potentials of this kind, as shown in FIG. 5, in order to make the positive voltage smaller than the negative voltage, a resistor is provided on the high potential side of the high voltage generating circuit and an intermediate tap is provided. By connecting a diode, a part of the positive voltage is short-circuited, the positive voltage becomes lower than the negative voltage,
In another method, a high-voltage negative DC voltage is used as a bias to superimpose it on the high-voltage AC voltage to generate a difference between the positive and negative voltages.

[0004]

However, in the circuit in which the diode and the resistor are inserted, the treatment of equal positive and negative voltages can be performed without using switching devices for high voltage.
A switching device that can withstand a high voltage is required to perform a treatment that repeatedly changes the positive voltage lower than the negative voltage arbitrarily and repeatedly in time, and the positive potential alone cannot be changed at an arbitrary ratio. was there. On the other hand, in the method of superimposing a high-voltage DC voltage on a high-voltage AC voltage as a bias, it is necessary to switch or change the high-voltage DC power supply, which has been a cause of complication and price increase.

The present invention was devised to solve the above-mentioned problems, and it is possible to easily lower the positive voltage from the negative voltage by using a switcher with a relatively low withstand voltage. The purpose is to provide a positive / negative potential difference generation circuit that can be made equal or freely set.

[0006]

In order to solve the problem, the present invention divides the high-voltage generating winding into two, and converts one of them into a full-wave rectified voltage by a rectifier or the like. A positive / negative potential difference generating circuit is characterized in that it has means for generating a high voltage in which the positive voltage becomes lower than the negative voltage by superposing the other voltage, or vice versa.

Here, as a mechanism for changing the positive / negative voltage ratio, for example, a winding for high voltage generation is divided into two, 60% and 40% of the maximum voltage, and this 40% voltage is full-wave. By rectifying a negative full-wave rectified waveform voltage and superposing this voltage with a winding voltage of 60%, in the case of positive voltage, 60% + (-40%) = 20%, negative voltage In the case of,
-60% + (-40%) =-100% voltage generation circuit. Here, the rectifying element is not limited to a diode, and any element having a function equivalent to this may be used.

Therefore, when it is desired to make the voltage on the positive side variable, it is possible by dividing the voltage of the above-mentioned superimposed full-wave rectified waveform by a resistor or the like, and when the same voltage is applied to both the positive and negative sides. It may be switched by a relay or the like, or continuously adjusted by a variable resistor or the like.

With such a circuit configuration, the positive / negative voltage ratio can be easily switched or adjusted in terms of time, and more effective treatment can be performed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The principle of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing the principle of a circuit that is used by switching between the case of applying the same positive and negative voltage and the case of applying a lower positive voltage than a negative voltage. In FIG. The changeover switches 1b and 2b are closed, and a state in which positive and negative voltages are applied is shown. In FIG. 1, 1
Is a transformer for generating a high voltage, and includes a primary winding to which a power supply voltage is applied and a secondary winding and a tertiary winding for generating a high voltage. Therefore, when the power supply voltage e1 is applied between the terminals 2 and 3 of the primary winding, a voltage e2 larger than half the maximum voltage is applied between the terminals 4 and 5 of the secondary winding. A smaller voltage e3 is generated between the terminals 6 and 7. In addition, in FIG.
These windings have windings so that a positive voltage appears at the ● -marked terminals of the secondary and tertiary windings when a voltage is applied so that the ● -marked terminal of the primary winding becomes positive. It has been subjected.

The above-mentioned tertiary winding has diodes D1 and D
A full-wave rectifier circuit consisting of 2, D3 and D4 and a load resistor R2 are connected. In the phase range (0 ° to 180 ° in Fig. 4) in which the direction of the ● mark terminal of the tertiary winding is positive, A current flows through the route of winding terminal 6 → diode D1 → resistor R2 → diode D4 → tertiary winding terminal 4, and a voltage is generated in which the left side of the load resistor R2 in the figure is positive and the right side is negative. On the contrary, the direction of the ● terminal 6 of the tertiary winding becomes negative (Fig. 4).
180 ° to 360 °), tertiary winding terminal 7 → diode D
A current flows through the path of 2 → resistor R2 → diode D3 → tertiary winding terminal 6, and a voltage is generated in which the left side of the resistor R2 in the figure is positive and the right side is negative. The voltage waveform across the resistor R2 is shown by the e3 curve in FIG.

Therefore, the terminal 5 on the low voltage side of the secondary winding
Is connected to the ground 10 through the changeover switch 2b → R2 → changeover switch 1b, the above-mentioned full-wave rectified negative voltage is superposed on the terminal 5 of the secondary winding. A voltage in which the secondary voltage e2 from the terminal 4 of the winding is superposed is generated at the secondary winding terminal 4, and is supplied to the potential mat 9 through the safety resistor R1 to create a high electric field in a living body (not shown). FIG. 2 shows the change in voltage during one cycle in this case. In FIG. 2, e2 is the voltage generated in the secondary winding, e3 is the voltage generated in the resistor R2, and E is the change in the sum of the secondary voltage e2 and the voltage e3 generated in the resistor R2. . As is clear from FIG. 2, the voltage supplied to the potential mat 9 is the resistance R2 when the ● side of the secondary voltage is positive.
The voltage generated at the secondary voltage e2 is subtracted from the secondary voltage e2, and when the side of the secondary voltage is negative, the voltage generated at the resistor R2 is added to the secondary voltage e2. As a result, a positive or negative voltage difference can be generated. ..

FIG. 3 shows an embodiment of the present invention, and FIG. 4 shows a modification thereof. In FIGS. 3 and 4, the same parts as those in FIG. 1 are designated by the same reference numerals. As shown in FIG. 3, the contact 3b of the changeover switch and the voltage adjusting switch 4 are shown.
With b closed and all other contacts open,
A power supply voltage is applied between terminals 2 and 3 of the primary winding of transformer 1, and e2 and e3 are applied to the secondary and tertiary windings, respectively.
When terminal 6 of the tertiary winding is positive, the current flows from terminal 6 to changeover switch 3b to diode D6 to resistor R3 to resistor R4.
→ Flows with terminal 7. Therefore, the lower side of the figure becomes negative with ground 10 as a reference point across both ends of resistors R3 and R4.
Is generated. At this time, a voltage whose upper side in the figure is positive is generated in the secondary winding, and the potential mat 9 is grounded.
The voltage e2− (e31 + e32) is applied in the route of 10 → R3 → R4 → voltage adjustment switch 4b → resistor R5 → terminal 5 → secondary winding → terminal 4 → safety resistance R1 → terminal 8 → potential mat 9.

Next, during a period in which a voltage in which the lower side of FIG. 3 becomes positive is generated in each winding, the current in the tertiary winding is a diode.
Since it is cut off at D6, terminal 7 → voltage adjustment switch 4b
→ Resistor R5 → Diode D5 → Current flows through terminal 6, resistors R3 and R
No voltage is generated at 4 and the right side of the figure is positive for resistor R5e
3 voltage is generated. At this time, since a voltage with the upper side of the figure being negative is generated in the secondary winding, the potential mat 9 has ground 10 → resistor R3 → resistor R4 → voltage adjustment switch 4b → resistor R5 → terminal 5 → Secondary winding → Terminal 4 → Safety resistance R1 → Terminal 8 →
A negative voltage of e2 + e3 is applied through the path of the potential mat 9. This state is similar to the change as shown in FIG.

Next, when the changeover switch 3a is closed and 3b is opened, no current flows through the resistors R3 and R4 even when the polarity is unacceptable, and the resistor R3 is only connected in parallel with the tertiary winding. Therefore, even if the generated voltage of the tertiary winding is applied to the resistor R3 and the upper side of FIG. 3 is not properly held, ground 10 → resistor R3 → resistor R4 → terminal 7 → tertiary winding → terminal 6 → changeover switch
3a → terminal 5 → secondary winding → terminal 4 → safety resistance R1 → terminal 8 → potential mat 9 or ground 10 → resistance R3 → resistance R4 → voltage adjustment switch 4b → resistance R5 → terminal 5 → secondary winding → terminal 4 → resistor R1 →
The same positive / negative voltage of (e2 + e3) is applied along the path from the terminal 8 to the potential mat 9.

The voltage adjustment switches 4a and 6a are for changing the ratio of the positive voltage to the negative voltage. For example, if the voltage adjustment switch 4b is opened and 4a is closed, the positive voltage is generated only when the positive voltage is generated. The voltage to be subtracted can be lower than that of. The voltage adjustment switch includes not only the changeover switch but also all the voltage dividing elements such as the variable resistor, and includes the case where the intermediate contact 4a of the changeover switch of FIG. 3 is omitted.

FIG. 4 is a modification example in which the positive voltage added to the secondary voltage e2 is variable contrary to FIG. 3 only when the upper side of each winding is positive. For example, the changeover switch 6b in the figure is closed. If the upper side of the figure is positive, ground 11 is taken as a reference in the route of terminal 6 → diode D7 → resistor R6 → resistor R7 → terminal 7, and the lower side of R6 and R7 is negative. Voltage e41 and e
42 occurs. Therefore, since the right end of the diode D7 is grounded by the changeover switch 6b, only the secondary voltage e2 is applied to the potential mat 9. When the upper side of the figure is negative, no voltage is generated in the resistors R6 and R7, so that the potential mat 9 is grounded 11 → changeover switch 6b → resistor R6 → resistor R7 →
Terminal 7 → Tertiary winding → Terminal 6 → Terminal 5 → Secondary winding → Terminal 4 →
The voltage of e2 + e3 is applied through the route of safety resistance R1 → terminal 8 → potential mat 9. Further, in the case where positive and negative voltages are generated, it is possible by opening the voltage adjusting switch 6b and closing 7a. When the voltage is negative, the voltage added to the secondary voltage e2 by opening the changeover switch 6b and closing 6a. Can be changed.

[0018]

According to the present invention, for example, in a potential treatment device, it is possible to adjust the ratio of the positive voltage and the negative voltage and to switch the positive and negative voltages by a simple mechanism. It is possible to obtain a high potential treatment device.

[Brief description of drawings]

FIG. 1 is a diagram relating to an embodiment of the present invention and is a circuit diagram showing the principle.

FIG. 2 is a characteristic diagram showing a relationship between a phase and each voltage according to an embodiment of the present invention.

FIG. 3 is a circuit diagram showing a first embodiment of a diagram according to an embodiment of the present invention.

FIG. 4 is a diagram relating to one embodiment of the present invention and is a circuit diagram showing a second embodiment.

FIG. 5: Example of existing circuit

[Explanation of symbols]

1 Transformers 2 and 3 Primary winding terminals 4 and 5
Secondary winding terminals 6 and 7 Tertiary winding terminals 8 Output terminals 9 Potential mat 10 Ground e1 Primary voltage e2 Secondary voltage e3 Tertiary voltage E
Output voltage R1 Safety resistance R2, R3, R4 Resistance D1, D2, D3, D4, D5
Diode 1a, 2a, 3a, 6a, 7a Changeover switch normally open contact 1b, 2b, 3b, 6b Changeover switch normally closed contact 4a, 5a Voltage adjustment switch normally open contact 4b Voltage adjustment switch Normally closed contact

[Procedure amendment]

[Submission date] June 13, 2002 (2002.6.1)
3)

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a diagram relating to an embodiment of the present invention and is a circuit diagram showing the principle.

FIG. 2 is a characteristic diagram showing a relationship between a phase and each voltage according to an embodiment of the present invention.

FIG. 3 is a circuit diagram showing a first embodiment of a diagram according to an embodiment of the present invention.

FIG. 4 is a diagram relating to one embodiment of the present invention and is a circuit diagram showing a second embodiment.

FIG. 5 is a diagram relating to one embodiment of the present invention and is a circuit diagram showing a third embodiment.

FIG. 6 Example of existing circuit

[Explanation of symbols] 1 Transformers 2 and 3 Primary winding terminals 4 and 5
Secondary winding terminals 6 and 7 Tertiary winding terminals 8 Output terminals 9 Potential mat 10 Ground e1 Primary voltage e2 Secondary voltage e3 Tertiary voltage E
Output voltage R1 Safety resistance R2, R3, R4 Resistance D1, D2, D3, D4, D5
Diode 1a, 2a, 3a, 6a, 7a Changeover switch Normally open contact 1b, 2b, 3b, 6b
Changeover switch Normally closed contact

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

Claims (2)

[Claims] 1. A high voltage generating means having two sets of secondary windings, wherein a voltage generated by full-wave or half-wave rectification of the generated voltage of the one set of windings is produced to generate another voltage. A positive / negative potential difference generation circuit characterized by making the peak value of positive potential smaller than that of negative potential by superimposing voltages in the same or opposite phases. 2. A changeover switch is provided, which is characterized in that a case where the peak value of the positive potential is made smaller than a peak value of the negative potential and a case where they are made equal to each other are changed or the ratio thereof is made variable. The positive / negative potential difference generation circuit according to claim 1.