JP5717013B2 - AC potential treatment device - Google Patents

Description

  The present invention relates to an AC potential treatment device, and more particularly to improvement of a means for generating a sine wave AC input to a step-up transformer.

  As a conventional AC potential treatment device, for example, a positive voltage bleeder circuit provided in a secondary coil of a commercial AC step-up transformer as described in Japanese Patent No. 2609574 (Patent Document 1) uses a positive voltage and a negative voltage applied to a living body. An AC potential treatment device in which the ratio of the peak value to the voltage is set to 1: 3 is well known, and Japanese Patent Application Laid-Open No. 61-118346 (Patent Document 2) and Japanese Patent Application Laid-Open No. 2006-239032 (Patent Document 3). Such a potential therapy device is known in which an amplified output of a rectangular wave oscillation circuit is supplied to a primary coil of a step-up transformer, and a diode and a resistor are connected to the high voltage secondary coil of the transformer to obtain a rectangular wave high voltage.

  Patent Document 1 (Japanese Patent No. 2609574) discloses an alternating-current potential treatment in which a peak value ratio between an alternating positive voltage and a negative voltage is set to 1: 3 when an alternating high voltage is applied to a living body to perform treatment. Although an AC potential can be applied to a living body at a rate equal to the ideal abundance ratio of ions in a healthy human body, Patent Document 1 discloses a commercial power source as described in the only example in paragraph 0009 thereof. Since the alternating current is input to the step-up transformer, the biologically applied alternating current is limited to 50 Hz or 60 Hz in Japan.

  In recent years, among a large number of patients who are performing potential therapy with the AC potential therapy device of Patent Document 1 in Japan, several patients in the 60 Hz region west of Fuji River and Itoi River have been described as “in the 50 Hz region in the east. It seems that this treatment is more effective and quicker than the potential treatment, ”and there are some voices saying“ I'm not satisfied with it ”among multiple patients in the 50Hz region. It is starting to appear.

  On the other hand, since the Japanese Utility Model Publication No. 61-118346 and Japanese Patent Application Laid-Open No. 2006-239032 (Patent Documents 2 and 3) are both potential treatment devices having an oscillation circuit, the living body applied alternating current is not limited to the commercial power supply frequency, In each of these documents, as described in the only examples, the rectangular wave signal obtained by the rectangular wave oscillation circuit is output and amplified as it is, and is input to the primary coil of the step-up transformer, and the rectangular wave generated in the secondary coil. The biologically applied AC voltage having a waveform close to a rectangular wave as shown in FIG.

  Therefore, even if the class B bush-pull amplifier circuit is used for the rectangular wave output amplifier circuit in each of these documents 2 and 3, there is an essential problem that the efficiency is as low as 50% or less. Since the input and output of References 2 and 3 are both rectangular wave voltages, using a current general inexpensive booster transformer made of a core material and a stranded wire compatible with commercial power supplies can easily generate unwanted roaring noise. There is an essential big problem that it is easy to overheat.

  Furthermore, the living body impressed alternating current by the high-voltage rectangular wave output of each of the above-mentioned Patent Documents 2 and 3 is likely to cause harmful ringing, overshoot, and preshoot. Therefore, the living body impressed alternating current using a smoothly changing sine wave is used. Compared with potential treatment, each of these Patent Documents 2 and 3 has a tendency that unpleasant feeling like hot water is likely to remain after potential treatment, the effectiveness and rapid efficacy of the potential treatment effect are poor, and biological rejection occurs. There are specific and serious problems.

  In addition to the conventional examples according to Patent Documents 1 to 3, an alternating current waveform including a high frequency component is generated by a switching inverter as disclosed in Japanese Patent Application Laid-Open No. 2009-279024 (Patent Document 4), and this alternating current output is passed through a filter circuit. An electric potential treatment device that alternately supplies the primary coil of the step-up transformer or two high-frequency pulses that are separately input to the two step-up pulse transformers as disclosed in Japanese Patent Application Laid-Open No. 2011-24859 (Patent Document 5). A potential treatment device in which a diode, a smoothing capacitor, and an electrode are connected to the high-voltage secondary coil of each pulse transformer is also well known.

  JP 2009-279024 A (Patent Document 4) is an open patent publication directly filed by the applicant, and is simply a fragmentary list of well-known matters and desires along with handwritten cartoon drawings. After all, the intention of 4 can be read from the description of paragraph 0011 as a potential treatment device using a current class D audio amplifier based on pulse width modulation as an AC output circuit applied to the primary coil of the step-up transformer. However, since there is no description about the important concrete circuit, even if this person sees this Unexamined-Japanese-Patent No. 2009-279024, this has the serious big problem that the said electric potential treatment device cannot be made and cannot be implemented. Yes.

  Class D audio amplifiers include an amplifier with a full-bridge circuit configuration using two series of conduction control elements such as two power MOS FETs and bipolar transistors in series, and a half using only one series of two series conduction control elements. There is an amplifier with a bridge circuit configuration, and the half-bridge class D audio amplifier can be used inexpensively with a small number of components. However, the “bus pumping” phenomenon due to the self-induced current of the demodulation choke coil, etc. The class D audio amplifier with the full bridge circuit configuration can alleviate the above problem but requires twice as many parts as the half bridge configuration. The above-mentioned patent document 4 has no description at all and suggests that there are fundamental problems that are incompatible with each other. Et al. Is also the no.

  That is, the class D audio amplifier having a half-bridge configuration returns the self-induction current, which is about to flow out from the demodulation choke coil output side, to the input side from the coil output side when driving a load (step-up transformer). An amplifier circuit in which a low-frequency signal current caused by sound or other sound flows through a diode having excellent high-frequency characteristics, usually called a free wheeling diode, to suppress fluctuations in power supply voltage caused by a "pumping" phenomenon The above-mentioned Patent Document 4 also has a fundamental and serious problem that there is no portion that can be connected without distorting the low-frequency signal, and the fluctuation of the power supply voltage due to the above phenomenon cannot be eliminated. There is no.

  The class D audio amplifier of the current general half-bridge configuration is subject to fluctuations in the power supply voltage due to the “bus pumping” phenomenon when the load (step-up transformer) is bus-driven at a low frequency of 200 Hz or less. The higher the frequency, the lower the load impedance, the smaller the value of the bus capacitor, the less the bus capacitor value, and the duty-free “bus pumping” when the duty ratio is 25% and 75%, respectively. There is no description or suggestion in Patent Document 4 that the fluctuation of the power supply voltage due to the phenomenon increases and the operation of the potential treatment device becomes extremely unstable.

  However, in a class D audio amplifier having a general full-bridge circuit configuration using two series conduction control elements such as power MOS / FET having a parasitic diode in two rows, the “bus pumping” phenomenon is caused by the parasitic diode. However, the parasitic diode is significantly different from the free wheeling diode in that the high frequency characteristics are poor and the reverse recovery time is long, so that the self-induced current of the demodulation choke coil is shifted from the demodulation output side to the input side. When the load (step-up transformer) is bus-driven at a low frequency of about 60 to 200 Hz, the fluctuation of the power supply voltage due to the “bus pumping” phenomenon is completely eliminated as described in the paragraph 0012. The fundamental problem that cannot be wiped out, and the power MOS FET with parasitic diode action is Generally exotherm large, the problem that it is necessary strict heat dissipation, have no described at all in Patent Document 4.

  On the other hand, Japanese Patent Laid-Open No. 2011-24859 (Patent Document 5), as described in paragraphs 0020 and 0022, inputs two high-frequency switching pulses to two boosting high-frequency pulse transformers, respectively, A positive high voltage pulse voltage is obtained by a parallel circuit of a diode, a resistor and a smoothing capacitor connected to the high voltage secondary coil of the pulse transformer, and a diode, a resistor and a smoothing capacitor connected to the high voltage secondary coil of the other pulse transformer After the negative high voltage pulse voltage is obtained by the parallel circuit, each of these high voltage pulse voltages is supplied to the two electrodes through protective resistors, respectively, and is supplied separately.

  Therefore, this Patent Document 5 has a fundamental problem that a single electrode cannot apply a high-voltage alternating current to a living body, and is compared with a potential treatment by a living body-applied alternating current using a sine wave that changes smoothly. Thus, Patent Document 5 has a fundamental and serious problem that unpleasant feeling such as hot water is likely to remain after electric potential treatment.

  Further, in Patent Document 5, as compared with a single-electrode potential treatment device, a pulse boosting transformer, a diode / smoothing capacitor connected to the high-voltage secondary coil, a Himmeg resistor for bioprotection, an electrode, etc. Since expensive high-voltage electric parts are required twice each, Patent Document 5 has an essential and large problem that it becomes expensive due to poor workability.

Japanese Patent No. 2609574 Japanese Utility Model Publication No. 61-118346 JP 2006-239032 A JP 2009-279024 A JP 2011-24859 A

  An object of the present invention is to alternately supply the demodulated half-wave outputs of two systems of width-modulated amplified pulse outputs whose phases are 180 ° different from each other to the primary coil of the step-up transformer by inverting the current direction for each half-wave. Thus, a high-voltage living body applied alternating current is obtained from the secondary side of the transformer.

  An object of the present invention is to construct a potential treatment device that performs treatment by applying an alternating high voltage to a living body. From a sinusoidal low-frequency voltage having a frequency of about 60 to 200 Hz, two phases of sine differing in phase from each other by 180 °. Two switching elements connected to a DC power source having a voltage sufficiently higher than the signal voltage are obtained by obtaining two half-width-modulated amplified pulse outputs obtained by obtaining a half-wave signal and pulse-width-modulating each half-wave signal separately. By performing switching control separately, two width-modulated amplified pulse outputs whose phases are different from each other by 180 ° are obtained, and then self-induced current generated in the choke coil at the time of demodulation of each pulse output is changed from the coil output side to the coil input side. Each of the pulse outputs is demodulated separately by two systems of a demodulator circuit having a diode and a capacitor that can be returned to each other, so that the phases are 180 ° different from each other. Retrieve demodulated sine half wave output of two systems.

  On the other hand, between the output side of each coil and the ground, two series conduction control elements are connected one by one, and the first row coil side conduction control element and the second row ground side conduction control element, and The second row of coil-side conduction control elements and the first row of ground-side conduction control elements are alternately controlled in synchronism with the respective half-wave outputs, thereby connecting the conduction control elements in each row. The current direction of the primary coil of the step-up transformer connected between them is reversed every half wave, and the high voltage sine wave AC generated in the transformer secondary coil is converted into a peak value ratio between the positive voltage and the negative voltage by a positive voltage bleeder circuit. Can be achieved by a one-to-three biological application AC.

However, as a demodulating circuit for each width-modulated amplified pulse output, a choke coil connected to the output side of the switching element, a one-end grounded capacitor connected to the demodulation output side of each coil, and an output of each element By demodulating the width-modulated amplified pulse output separately using two systems of demodulating circuits having anode- grounded freewheeling diodes connected to the side, the phase is 180 ° from the demodulated output side of the coil. Two different demodulated sine half-wave outputs may be obtained.

  According to the present invention, a sine half-wave signal obtained from a sine low-frequency voltage having a frequency of about 60 to 200 Hz is obtained by width-modulating a high-frequency pulse of about 100 KHz to obtain a width-modulated high-frequency pulse. By switching control of the switching element connected to a high voltage DC power supply with the width-modulated high-frequency pulse, a width-modulated amplified pulse output can be extracted from the output side of the element with a high efficiency of about 90% or more.

In the present invention as the above-described demodulation circuit for each pulse output, a diode and a capacitor that can return the self-induced current generated in the demodulation choke coil from the coil output side to the coil input side during the off period of the element during the switching operation of each element. 2 systems of demodulation circuits, specifically, a choke coil connected to the output side of each switching element, a one-end grounded capacitor connected to the demodulation output side, and an anode ground connected to the output side of the element Since the two demodulator circuits having the diodes are used, the self-inductive current of each coil that is about to flow out alternately from the demodulation output side of the coil during the demodulation operation,
Since it can be efficiently returned to the input side of the choke coil through a series circuit with a wheeling diode, the bus pumping phenomenon that is harmful and useless even when driving the load (step-up transformer) at a low frequency of about 60 to 120 Hz. There is an excellent effect that the fluctuation of the power supply voltage due to this phenomenon can be suppressed and wiped off.

  That is, during the on-period of the element during the operation of the switching element, the supply to the output side is suppressed while accumulating a part of the choke coil input in the coil, and during the off-period during the switching operation of the element, the capacitor The self-induced current of the coil can be reliably returned from the output side of the coil to the input side through the diode and the diode, and the demodulation circuit used in the present invention reduces the change of the square wave of the high-frequency pulse, that is, the AC component. Naturally it also operates as an original low-pass filter, so that even when the load (step-up transformer) is bus-driven at a low frequency of about 60 to 120 Hz, power supply voltage fluctuations due to the bus pumping phenomenon can be more reliably suppressed. Has an excellent effect.

  In the present invention, two series conduction control elements are connected one by one between the demodulation output side of the choke coil and the ground, the first row coil side conduction control element and the second row ground side conduction control element, And the second row of coil-side conduction control elements and the first row of ground-side conduction control elements are alternately controlled in synchronism with the respective half-wave outputs, thereby connecting the switching elements in each row. Since the sine wave alternating current with the current direction reversed every half wave can be supplied to the primary coil of the step-up transformer connected between the high voltage sine wave from the transformer secondary coil with a high efficiency of about 90% or more. There is also an effect that the exchange cost can be obtained and the running cost can be significantly reduced.

  Specifically, a sine wave alternating current that smoothly changes can be supplied to the primary coil of the step-up transformer by reversing and repeatedly supplying the current direction of the primary coil of the step-up transformer for each half wave of the half-wave output. Since a high voltage sine wave alternating current of about 10 to 15 kilovolts can be generated in the transformer secondary coil, a high voltage sine wave voltage whose frequency changes smoothly at about 60 to 200 Hz can be generated without difficulty, and ions in a healthy human body The ratio of positive voltage and negative voltage equal to the ideal existence ratio is obtained by applying a bio-applied alternating current of 1: 3 to the living body, so it can always be applied anywhere regardless of the commercial power supply frequency. There is also an excellent effect that the effectiveness and the rapid effect of the therapeutic effect can be greatly promoted and the biological rejection reaction can be remarkably reduced.

  Furthermore, in the frequency range of the sine low frequency signal or low frequency voltage of about 60 to 200 Hz, the current general boost transformer or low frequency transformer which is made of an inexpensive silicon steel plate mass-produced corresponding to a commercial power source is used as it is. Since an expensive transformer using a core material for audio is unnecessary, the present invention has an economic effect that the manufacturing cost can be reduced.

System circuit diagram showing an example of an AC potential treatment device according to the present invention Operation waveform diagram in the circuit of FIG. Operation waveform diagram in the circuit of FIG. Operation waveform diagram in the circuit of FIG.

  Next, an example of an embodiment for carrying out the present invention will be described with reference to the drawings. An AC potential treatment device of the present invention is a potential treatment device that performs treatment by applying an alternating high voltage to a living body. As shown in the system circuit diagram of FIG. 1, the frequency obtained from the current general sine low frequency generation circuit 1 such as a C / R oscillation circuit and a positive feedback oscillation circuit operating with a DC power supply DC is about 60 to 200 Hz, for example, A sinusoidal low frequency signal having an amplitude of about 10 volts at about 70 to 120 Hz is input to the primary coil of the first stage low frequency transformer T1.

  A half-wave rectification is performed by half-wave rectification of two systems of equal-level sine wave voltages generated at the intermediate taps A and B of the center-grounded secondary coil in the transformer T1 with 180 ° different from each other in the same direction. After obtaining two sinusoidal half-wave signals having amplitudes of about 7 volts and phases different from each other by 180 °, the signals are respectively input to the input terminals C · of the current general pulse width modulation circuit 2. Each input is input to D as shown in FIG.

  On the other hand, a high-frequency pulse having a peak value of about 5 volts obtained from a high-frequency pulse generating circuit 3 operating with the current general-purpose DC power source DC such as a triangular wave oscillator having a frequency of about 100 KHz is generated in each of the pulse width modulation circuits 2. By performing pulse width modulation for each sine half-wave signal, the peak value as shown by E and F in FIG. Two systems of width-modulated high frequency pulses that are 180 ° different from each other are obtained.

  Next, as shown in FIG. 1, a power MOS / FET or bipolar transistor having a drain or collector connected to a DC power source + V of about 130 volts, for example, which is sufficiently higher than the voltage of each sine half-wave signal obtained from the DC power source DC. Between each of the control electrodes E and F such as the gates and bases of the two switching elements S and the source and emitter, a pulse transformer PT or a currently used general gate drive IC (such as IC FAN 7382N manufactured by Fairchild, USA) The two systems of width-modulated high frequency pulses are inputted separately, and the switching elements S are individually controlled by the two systems of high frequency pulses, whereby the source (emitter) of each element S is controlled. And the like. From each output side G · H, the phase where the peak value is about 130 volts as shown in G · H in FIG. Retrieve the width modulation already amplified pulse output of the system.

In order to individually demodulate the two pulse outputs, the choke coil L of about 180 μH connected to each output side G · H (source or emitter) of the switching element S, and A ceramic capacitor C of about 0.1 μF having one end connected to each of output sides I and J and the other end grounded, and an anode having a cathode connected to each output side G and H of the element S By demodulating each of the two width-modulated amplified pulse outputs by the two demodulating circuits 4 each having a ground freewheeling diode D,
A demodulated sine half-wave output having a peak value of about 130 volts as shown by I · J in FIG. 3 can be taken out from the demodulation output side I · J of each coil L.

  In this demodulating operation, the self-inductive current of the coil that is going to flow alternately from the output side I · J of each choke coil L during the OFF period during the switching operation of each element S is connected in series with the capacitor C and the diode D, respectively. Since the demodulating operation can be efficiently returned to the input side of each coil L within the above-mentioned off period by passing through the circuits alternately, no harmful effects are required even when driving the load (step-up transformer) at a low frequency of about 60 to 200 Hz. Since the “bus pumping phenomenon” does not occur and the fluctuation of the power supply voltage can be surely suppressed and wiped away, the demodulation output side I and J of the choke coil L can smoothly move as shown by I and J in FIG. The two demodulated sine half-wave outputs that change and differ in phase by 180 ° can be extracted with a conversion efficiency of 90% or more.

  On the other hand, a sine low frequency signal such as A1 in FIG. 3 having an amplitude of about 20 volts generated at one end A1 of the secondary coil of the low frequency transformer T1 shown in FIG. After inputting to the primary coil of the transformer T2 and half-wave rectifying the sine wave alternating current generated in the secondary coil by the diode d, a sine half-wave signal having an amplitude of about 20 volts is created as shown by A2 in FIG. The half-wave signal is formed into a substantially rectangular wave shape as shown by A3 in FIG. 3 by a general-use slice circuit 5 composed of a resistor R and a Zener diode ZD, or a common-use rectangular wave shaping circuit using a comparator or the like. A first ON signal having an amplitude of about 5 volts synchronized with the half-sine wave signal is generated.

  3 is obtained from the other end B1 of the secondary coil of the transformer T1 with the same voltage as the sine low frequency signal of A1 of FIG. The signal is half-wave rectified as described above to produce a sine half-wave signal such as B2 in FIG. 3, and then the signal is shaped into a substantially rectangular wave shape as described above, and is phase-shifted with respect to the first ON signal. A second ON signal having a rectangular wave shape with an amplitude of about 5 volts as shown in B3 of FIG.

  In addition, as shown in FIG. 1, two series conduction controls using power MOS / FETs or bipolar transistors are provided between the demodulation output sides I and J of the two choke coils L and the ground in FIG. Elements are connected one by one to form a continuity control circuit 6, and between the control electrodes such as the gate and base of the coil side element Q1 and the source and emitter of the coil-side element Q1 in the first column as shown in A3 in FIG. 3 is generated between the control electrode of the ground element Q4 in the second row and the ground at the first end B1 of the secondary coil of the low frequency transformer T1. By applying a first ON signal having an amplitude of about 5 volts as shown in A3 of FIG. 3 in which the sine half-wave signal itself having an amplitude of about 20 volts such as B1 of FIG. Coil side element Q1 and ground side conductor Synchronously controls conduction between the child Q4 respectively.

  Next, a rectangular wave shape shaped as described above is provided between the control electrode of the coil side element Q3 in the second row in FIG. 1 and the source and emitter, and between the control electrode of the ground side element Q2 in the first row and the ground, respectively. 3 is applied, and the conduction between the coil-side element Q3 and the ground-side conductive element Q2 is controlled synchronously, whereby each of the two conduction control elements in series is connected to each other. The primary coil t1 of the step-up transformer T connected between the connecting portions K and L has two systems of sine and half whose peak value is about 130 volts and the current direction is inverted every half wave as shown in K and L of FIG. Wave output can be supplied alternately.

  As a result, the two sine half-wave outputs supplied to the primary coil t1 of the step-up transformer T are sinusoidal half-wave outputs whose current directions are inverted every half-wave. As a result, a high-voltage sine wave alternating current of about 10 to 15 kilovolts that smoothly changes as indicated by M in FIG. 4 can be generated in the transformer secondary coil t2.

  Specifically, the sine half-wave output, such as K in FIG. 4, generated in the interconnection K of the conduction control elements Q1 and Q2 in the first row is the transformer primary coil t1 and interconnection L and the ON state. 4 flows to the ground side sequentially through the drain and source of the ground side conduction control element Q4 in the second row, and a sine half-wave output as shown in K of FIG.

  Immediately thereafter, this time, the sine half-wave output such as L in FIG. 4 generated in the interconnection L of the conduction control elements Q3 and Q4 in the second row is converted into the transformer primary coil t1 and the interconnection K and ON. As a result, the current flows to the ground side sequentially through the drain and source of the ground side conduction control element Q2 in the first row in the state, and a half-wave output in the opposite direction can be supplied to the transformer primary coil t1. By sequentially repeating the half-wave output alternating inversion supply operation, a sinusoidal alternating current can be continuously supplied to the primary coil t1 of the step-up transformer T, and the transformer secondary coil t2 can be smoothly changed as indicated by M in FIG. High voltage sine wave alternating current of about 10 to 15 kilovolts can be generated.

  One end of the secondary coil t2 in the step-up transformer T is connected to a common working ground line in the DC power source DC via a grounding Hi-Meg resistor R0, and 5-10 MΩ between both ends of the secondary coil t2. A large-scale high-Meg resistor R1 of about 10 W and a diode d1 are connected in parallel, and a positive voltage bleeder circuit 7 using the Hi-Meg resistor R2 and the diode d2 in series with the parallel circuit is connected, and the resistors R1 and R2 By setting the resistance value ratio to 2: 1, the biologically applied alternating current having a peak value ratio between the positive voltage and the negative voltage generated as indicated by N in FIG. Can be supplied to the conductive mat m insulated from the living body via the current limiting high-Meg resistor R3.

  Therefore, since the living body applied AC according to the present invention is a living body applied AC using a sine wave that smoothly changes at a frequency of about 60 to 200 Hz, it is possible to prevent the generation of a living body rejection reaction and the ideal of ions in a healthy human body. A biological application in which the peak value ratio between the positive voltage and the negative voltage equal to the ideal abundance ratio of ions in a healthy human body is 1 to 3 while the positive voltage and the negative voltage are equal to the typical abundance ratio. Since alternating current can be applied to the living body through the conductive mat m and the like, the AC potential treatment can be performed with the living body-applied alternating current that changes smoothly everywhere regardless of the commercial power supply frequency. And rapid action can be greatly promoted.

  Naturally, the AC potential treatment device according to the present invention can also be used as an AC potential treatment device in which contact is applied to the affected part of the living body by a conducting conductor or the like instead of using the conductive mat m.

DESCRIPTION OF SYMBOLS 1 ... Sine low frequency generation circuit L ... Choke coil 2 ... Pulse width modulation circuit C ... Capacitor 3 ... High frequency pulse generation circuit D ... Free wheeling diode 4 ... Demodulation circuit ZD ... Zener diode 5 ... Slice circuit d * d1 * d2 ... Diode 6 ... Conduction control circuit S ... Switching element 7 ... Positive voltage bleeder circuit Q1 to Q4 ... Conduction control elements T1 and T2 ... Low frequency transformer R1 to R3 and R0 ... High Meg resistance PT ... Pulse transformer R ... Series resistance T ... Boost Transformer m ... Conductive mat t1 ... Primary coil of the step-up transformer DC ... DC power supply t2 ... Secondary coil of the step-up transformer

Claims (2)

  In an electric potential treatment device that performs treatment by applying an alternating high voltage to a living body, two sinusoidal half-wave signals having phases different from each other by 180 ° are obtained from a sinusoidal low-frequency voltage having a frequency of about 60 to 200 Hz. By switching control of two switching elements connected to a DC power source having a voltage sufficiently higher than the signal voltage by two systems of width-modulated high-frequency pulses that are individually pulse-width-modulated with half-wave signals, the phase becomes Two systems having a diode and a capacitor capable of returning the self-induced current generated in the choke coil from the coil output side to the coil input side after demodulating each of the pulse outputs after obtaining two width-modulated amplified pulse outputs different from each other by 180 ° By demodulating each pulse output separately by the demodulating circuit, two systems of demodulated sine half-wave outputs that are 180 degrees out of phase with each other On the other hand, between the output side of each coil and the ground, two series conduction control elements are connected one by one to form a conduction control circuit, and the coil side conduction control element in the first column in this circuit The second row ground side conduction control element, the second row coil side conduction control element, and the first row ground side conduction control element are alternately conducted in synchronization with the respective half-wave outputs, The current direction of the primary coil of the step-up transformer connected between the interconnecting portions of the conduction control elements in each row is reversed every half wave, and the high-voltage sine wave AC generated in the transformer secondary coil is converted by a positive voltage bleeder circuit. An alternating-current potential treatment device in which the crest value ratio between the positive voltage and the negative voltage is a living body applied alternating current of 1 to 3. In an electric potential treatment device that performs treatment by applying an alternating high voltage to a living body, the frequency is 60 to 20
Two systems of sinusoidal half-wave signals having phases different from each other by 180 ° are obtained from a sinusoidal low-frequency voltage of about 0 Hz, and the signals are obtained by two systems of width-modulated high-frequency pulses that are individually pulse-width modulated by these half-wave signals. After switching control of two switching elements connected to a DC power source having a voltage sufficiently higher than the voltage, two width-modulated amplified pulse outputs whose phases differ from each other by 180 ° are obtained. As a demodulating circuit, a choke coil connected to the output side of each element, a one-end grounded capacitor connected to the demodulated output side of each coil, and an anode grounded freewheeling connected to the output side of each element By demodulating each pulse output separately by two demodulating circuits having a diode, two systems having a phase difference of 180 ° from each other. While obtaining a finished half-sine output, said between ground and the output side of each coil, constitute a conduction control circuit are connected respectively in series two conduction control element column by column,
In this circuit, the first-row coil-side conduction control element, the second-row ground-side conduction control element, the second-row coil-side conduction control element, and the first-row ground-side conduction control element are respectively connected to the half-waves. By conducting conduction control alternately in synchronism with the output, the current direction of the primary coil of the step-up transformer connected between the interconnecting portions of the conduction control elements in each column is reversed every half wave, and the transformer secondary coil AC high-voltage sine wave alternating current generated in 1 by a positive voltage bleeder circuit, and the wave potential ratio of the positive voltage and the negative voltage is a living body applied alternating current of 1: 3.

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