JP5460546B2 - Static eliminator - Google Patents

Description

  The present invention relates to a static eliminator.

  In Patent Document 1 below, in a static eliminator that alternately generates positive ions and negative ions, an output terminal of a high-voltage generating circuit on the positive polarity side that generates positive ions and negative ions are generated. A device is disclosed in which the output terminal of a negative-voltage side high-voltage generating circuit is connected via a pair of resistors, and a discharge electrode is connected to the midpoint. With such a circuit configuration, the discharge electrode can be shared between the positive polarity high-voltage generation circuit and the negative polarity high-voltage generation circuit. However, in this circuit, it is necessary to generate a voltage twice as high as the discharge voltage (voltage applied to the discharge electrode) in each high voltage generation circuit, and there is a problem that each high voltage generation circuit becomes large.

FIG. 1 of Japanese Patent No. 4219451

  On the other hand, in order to lower the output voltage of each high voltage generation circuit, the circuit configuration shown in FIG. 9 can be considered. That is, first, the output terminal 77 of the high-voltage generating circuit 7 on the positive polarity side and the output terminal 87 of the high-voltage generating circuit 8 on the negative polarity side are connected via the first resistor R1. The output terminal 77 of the positive side high voltage generating circuit 7 is grounded via the second resistor R2, and the output terminal 77 of the positive side high voltage generating circuit 7 is connected to the negative side high voltage by the connection line L. The circuit configuration is connected to the input terminal 86 of the generation circuit 8.

  With the circuit configuration of FIG. 9, the output voltage of the high voltage generation circuit 8 on the negative polarity side and the output voltage of the high voltage generation circuit 7 on the positive polarity side are applied to the discharge electrode 15 almost as they are. This is because when the high voltage generation circuit 7 on the positive polarity side generates an output, a current flows through the resistor R2, and a voltage of almost the same level as the output voltage of each voltage generation circuit 7 is applied to both ends of the resistor R2. Therefore, when the high voltage generation circuit 8 on the negative polarity side generates an output, a current flows through the resistor R1, and a voltage of almost the same level as the output voltage of each voltage generation circuit 8 is applied to both ends of the resistor R1. Because.

  As described above, with the circuit configuration of FIG. 9, the output voltage of each of the high voltage generation circuits 7 and 8 can be made the same voltage as the discharge voltage, and the output voltage is about ½ that of the prior art.

  However, in the circuit configuration of FIG. 9, the output voltage of the positive-side high-voltage generating circuit 7 is applied to the negative-side transformer 6 a via the connection line L. Therefore, for example, when the output voltage of the high-voltage generating circuit 7 on the positive polarity side is 7 kV, 7 kV is applied to the transformer 6 b on the negative polarity side. Therefore, it is necessary to use a special transformer having a withstand voltage of about 7 kV or more for the negative-side transformer 6b, which increases the cost.

  The present invention has been completed based on the above situation, and an object thereof is to reduce the size and cost of a static eliminator.

  A first invention is provided on a secondary side of the first transformer connected to a power source and fed from the power source, and boosts a secondary voltage of the first transformer to increase the first voltage A positive-side high-voltage generating circuit for generating a positive high voltage at an output terminal, and a power supply connected to the power supply in parallel with the first transformer and fed from the power supply or different from the power supply A second transformer fed from the second transformer, and a negative polarity side that is provided on the secondary side of the second transformer and boosts the secondary voltage of the second transformer to generate a negative high voltage at the second output terminal A high voltage generation circuit, a control means for performing switching control for alternately connecting the power source to the first transformer side and the second transformer side, a discharge electrode connected to the second output terminal, and the first Connect the output terminal to the second output terminal A second resistor that connects a resistor, a ground-side terminal of the secondary-side terminals of the second transformer, and an input terminal of the negative-side high-voltage generating circuit that is the counterpart of the terminal; And a connection line connecting a connection point on the negative polarity side high voltage generation circuit side of the resistor and the first output terminal of the positive polarity side high voltage generation circuit.

  The second invention is provided on the secondary side of the first transformer connected to the power source and fed from the power source, and boosts the secondary voltage of the first transformer to increase the first voltage. A positive-side high-voltage generating circuit for generating a positive high voltage at an output terminal, and a power supply connected to the power supply in parallel with the first transformer and fed from the power supply or different from the power supply A second transformer fed from the second transformer, and a negative polarity side that is provided on the secondary side of the second transformer and boosts the secondary voltage of the second transformer to generate a negative high voltage at the second output terminal A high voltage generation circuit, a control means for performing switching control for alternately connecting the power source to the first transformer side and the second transformer side, a discharge electrode connected to the first output terminal, and the first Connect the output terminal to the second output terminal A second resistor for connecting a first resistor, a ground-side terminal among the secondary-side terminals of the first transformer, and an input terminal of the positive-side high-voltage generating circuit which is the counterpart of the terminal; It is characterized by comprising a connection line for connecting a connection point on the positive polarity side high voltage generation circuit side of the resistor and the second output terminal of the negative polarity side high voltage generation circuit.

  In the first invention and the second invention, since the discharge electrode can be shared, the static eliminator can be miniaturized. In addition, when a positive high voltage is generated at the first output terminal of the positive side high voltage generating circuit, a voltage of approximately the same magnitude as that voltage is applied to the second resistor, so the secondary side of the second transformer Does not take high voltage. From the above, since it is not necessary to use a special transformer with a high withstand voltage for the second transformer, the cost of the static eliminator can be reduced.

  According to the first and second inventions, it is possible to reduce the size of the static eliminator. In addition, cost reduction can be achieved.

The figure which shows the circuit structure of the static elimination apparatus in Embodiment 1 of this invention. Diagram showing the charging operation of the high-voltage generating circuit on the positive polarity side Diagram showing the discharge operation of the high-voltage generating circuit on the positive polarity side Diagram showing the charging operation of the high-voltage generating circuit on the negative polarity side Diagram showing the discharge operation of the high-voltage generation circuit on the negative polarity side The figure which shows the circuit structure of the static elimination apparatus in Embodiment 2 of this invention. Diagram showing the discharge operation of the high-voltage generating circuit on the positive polarity side Diagram showing the discharge operation of the high-voltage generation circuit on the negative polarity side Illustration explaining the problem

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
1. Description of the circuit configuration of the static eliminator Z1.
FIG. 1 is a diagram illustrating a circuit configuration of a static eliminator Z1 applied to the present embodiment. The static eliminator Z1 generates positive ions and negative ions from one discharge electrode 15 alternately.

  The static eliminator Z1 includes a DC power source 1, a pair of oscillation circuits 5a and 5b, a pair of transformers 6a and 6b, a pair of high voltage generation circuits 7 and 8, a discharge electrode 15, and a pair of switches 3a and 3b. The control circuit 20 that switches and controls the switches 3a and 3b, the first resistor R1, the second resistor R2, and the connection line L are mainly configured.

  More specifically, a pair of oscillation circuits 5a and 5b are connected in parallel to the DC power source 1. The energization paths A and B for the oscillation circuits 5a and 5b are provided with a switch 3a and a switch 3b, respectively, and these switches 3a and 3b are alternately opened and closed by the control circuit 20. .

  The oscillation circuit 5a receives power supply (power supply) from the DC power supply 1 and causes a primary current (oscillation current) to flow through the first transformer 6a, and is connected to the primary side of the first transformer 6a. The oscillation circuit 5b receives power supply (power supply) from the DC power supply 1 and causes a primary current (oscillation current) to flow through the second transformer 6b, and is connected to the primary side of the second transformer 6b.

  Further, a high-voltage generating circuit (corresponding to the “positive-side high-voltage generating circuit” of the present invention) 7 is connected to the secondary side of the first transformer 6a, and a high-voltage generating circuit (this is connected to the secondary side of the second transformer 6b). 8 corresponds to the “negative-side high-voltage generating circuit” of the invention.

  The high voltage generation circuit 7 is a multi-stage connection of half-wave voltage doubler rectifier circuits, and is known as a so-called Cockcroft-Walton type voltage doubler rectifier circuit. In the high voltage generation circuit 7 of this embodiment, half-wave voltage doubler rectifier circuits 71, 72, 73 are connected in three stages in series.

  The first-stage rectifier circuit 71 includes a capacitor C1, a diode D1, a capacitor C2, and a diode D2. The second stage rectifier circuit 72 includes a capacitor C3, a diode D3, a capacitor C4, and a diode D4. The third stage rectifier circuit 73 includes a capacitor C5, a diode D5, a capacitor C6, and a diode D6.

  Each of the diodes D1, D3, and D5 is connected between the power supply line L1 and the ground line L2 so as to be in a forward direction with respect to a current from the ground line L2 to the power supply line L1. The diodes D2, D4, and D6 are connected between the power supply line L1 and the ground line L2 so as to be in the forward direction with respect to the current from the power supply line L1 to the ground line L2. The capacitors C1, C3, C5 are installed in series on the power supply line L1, and the capacitors C2, C4, C6 are installed in series on the ground line L2.

  The high voltage generation circuit 7 is for generating a positive high voltage, and generates a positive high voltage (for example, 7 kv) at the output terminal (corresponding to the “first output terminal” of the present invention) 77. Let On the other hand, the high voltage generation circuit 8 described below is for generating a negative high voltage, and a negative high voltage (for example, a negative voltage) (for example, “second output terminal” of the present invention) is applied to the output terminal 87. -7 kv).

  The basic circuit configuration of the high voltage generation circuit 8 is the same as the circuit configuration of the high voltage generation circuit 7, and is a multi-stage connection of half-wave voltage doubler rectifier circuits.

  The first-stage rectifier circuit 81 includes a capacitor C7, a diode D7, a capacitor C8, and a diode D8. The second stage rectifier circuit 82 includes a capacitor C9, a diode D9, a capacitor C10, and a diode D10. The third stage rectifier circuit 83 includes a capacitor C11, a diode D11, a capacitor C12, and a diode D12.

  Each of the diodes D7, D9, and D11 is connected between the power supply line L3 and the ground line L4 so as to be in a forward direction with respect to a current from the power supply line L3 to the ground line L4. The diodes D8, D10, and D12 are connected between the power supply line L3 and the ground line L4 so as to be in the forward direction with respect to the current that flows from the ground line L4 to the power supply line L3.

  As described above, in the high voltage generation circuit 8, the connection directions (polarities) of the diodes D <b> 7 to D <b> 12 are all opposite to the circuit configuration of the high voltage generation circuit 7. The capacitors C7, C9, C11 are installed in series on the power supply line L3, and the capacitors C8, C10, C12 are installed in series on the ground line L4. The discharge electrode 15 is connected to the output terminal 87 of the high voltage generation circuit 8.

  In the static eliminator Z1, the output terminal 77 of the positive high voltage generating circuit 7 and the output terminal 87 of the negative high voltage generating circuit 8 are connected by the first resistor R1.

  Further, the ground-side terminal F2 among the secondary-side terminals of the second transformer 6b and the corresponding input terminal 86 of the high-voltage generation circuit 8 are connected by the second resistor R2. Further, a connection line L connects the input terminal 86 which is a connection point on the high voltage generation circuit 8 side in the second resistor R2 and the output terminal 77 of the high voltage generation circuit 7 on the positive polarity side.

2. Description of Circuit Operation of Static Removal Device Z1 As will be described below, the static elimination device Z1 can alternately apply positive and negative high voltages to the discharge electrode 15 by alternately opening and closing the switches 3a and 3b by the control circuit 20. .

(1) Circuit operation when a positive high voltage is output When a positive high voltage is output, the switch 3a is turned on by the control circuit 20, and the switch 3b is turned off.

  When the switch 3a is turned on, the first transformer 6a is energized to operate. As a result, a secondary voltage (E in this case) of a level obtained by multiplying the primary voltage applied to the primary side by the turn ratio is generated on the secondary side of the first transformer 6a. Applied between terminals 75 and 76. Since the polarity of the secondary voltage E of the first transformer 6a is periodically switched between positive and negative, the polarity of the secondary voltage E applied to both input terminals 75 and 76 of the high voltage generation circuit 7 is also switched periodically between positive and negative.

  Then, in the high voltage generation circuit 7, each time the polarity of the applied secondary voltage E is switched, the diodes D1 to D6 are sequentially turned on, and the capacitors C1 to C6 are sequentially charged.

  The charging operation will be briefly described. First, when a secondary voltage E having a positive polarity is applied to the input terminal 76, the potential of the ground line L2 is higher by E than the power supply line L1. As a result, the diode D1 is energized and the capacitor C1 is charged to the voltage level of the secondary voltage E.

  After that, when the polarity of the secondary voltage E is switched and a voltage that makes the input terminal 75 positive is applied, at this time, the secondary side of the first transformer 6a and the capacitor C1 are in series, and the power line L1 The potential is higher by 2E than the ground line L2. As a result, the diode D2 is energized and the capacitor C2 is charged to the voltage level of the potential difference 2E between both lines.

  Next, when the polarity of the secondary voltage E is switched and the secondary voltage E is applied to the input terminal 76 so as to be positive, the secondary side of the first transformer 6a and the capacitor C2 are in series. Thus, the potential of the ground line L2 is higher by 2E than the power supply line L1. As a result, the diode D3 is energized, and the capacitor C3 is charged to the voltage level of the potential difference 2E between both lines.

  As described above, each time the polarity of the secondary voltage E is switched, the levels of the potentials of the power supply line L1 and the ground line L2 are switched. As a result, each diode is sequentially energized, and a capacitor corresponding to the energized diode is provided. The battery is charged according to the potential difference between both lines L1 and L2.

  Finally, as shown in FIG. 2, all the capacitors C1 to C6 are charged, and the output terminal 77 of the high voltage generation circuit 7 has a voltage about six times the secondary voltage E (about 7 kv as an example). ) Occurs.

  Since the capacitors C2, C4, C6 of the high voltage generating circuit 7 and the second resistor R2 are connected in parallel, when the high voltage generating circuit 7 generates an output, a current flows through the second resistor R2. The output voltage of the high voltage generation circuit 7 (a high voltage of about 7 kV) is applied to both ends of the second resistor R2. Therefore, the output voltage (high voltage of about 7 kV) of the high voltage generation circuit 7 is applied to the discharge electrode 15 as it is.

  In this case, since the second resistor R2 is provided between the ground-side terminal F2 among the secondary-side terminals of the second transformer 6b and the corresponding input terminal 86 of the high-voltage generating circuit 8, When the high voltage generation circuit 7 generates an output, the voltage of the secondary side terminal (ground side terminal) F2 of the second transformer 6b becomes zero volts, and no high voltage is applied. Therefore, it is possible to use a normal transformer with a low withstand voltage as the second transformer 6b.

  The capacitors C1 to C6 of the high voltage generation circuit 7 maintain the charged state while the switch 3a is turned on, but when the switch 3a is turned off, the charged charge is discharged by the second resistor R2. (Path shown by a thick line in FIG. 3), the original state is restored.

(2) Operation at the time of outputting a negative high voltage When outputting a negative high voltage, the control circuit 20 turns off the switch 3a, and on the contrary, turns on the switch 3b.

  When the switch 3b is turned on, the second transformer 6b is energized to operate. As a result, a voltage (here, E) of a level obtained by multiplying the primary voltage by the turn ratio is generated on the secondary side of the second transformer 6b, and this is generated between both input terminals 85 and 86 of the high voltage generation circuit 8. Applied. Since the polarity of the secondary voltage E of the second transformer 6b is periodically switched between positive and negative, the polarity of the secondary voltage E applied to both input terminals 85 and 86 of the high voltage generation circuit 8 is also switched periodically between positive and negative.

  Then, in the high voltage generation circuit 8, the diodes D7 to D12 are sequentially turned on each time the polarity of the applied secondary voltage E is switched. As a result, the capacitors C7 to C12 are sequentially charged with the opposite polarity to the case of the high voltage generation circuit 7 described above. As a result, a voltage about -6 times the secondary voltage E (about -7 kv in this embodiment) is generated at the output terminal 87 of the high voltage generation circuit 8.

  Since the capacitors C8, C10, C12 of the high voltage generation circuit 8 and the first resistor R1 are connected in parallel, when the high voltage generation circuit 8 generates an output, a current flows through the first resistor R1, The output voltage of the high voltage generation circuit 8 (a high voltage of about −7 kV) is applied to both ends of the first resistor R1. Therefore, the output voltage (high voltage of about −7 kV) of the high voltage generation circuit 8 is applied to the discharge electrode 15 as it is.

  The capacitors C7 to C12 of the high voltage generation circuit 8 maintain the charged state while the switch 3b is turned on, but when the switch 3b is turned off, the charged charge is discharged by the first resistor R1 ( The route indicated by the bold line in FIG. 5) is returned to the original state.

  As described above, the static eliminator Z1 of the present embodiment can alternately apply positive and negative high voltages to the discharge electrode 15 by alternately opening and closing the switches 3a and 3b by the control circuit 20. Thereby, discharge occurs at the discharge electrode 5 and positive and negative ions can be generated alternately.

Next, the effect of this static elimination apparatus Z1 is demonstrated.
In the static eliminator Z1, the discharge electrode 15 is commonly used in the high voltage generation circuit 7 on the positive polarity side and the high voltage generation circuit 8 on the negative polarity side. Therefore, the number of parts can be reduced, and the static eliminator Z can be reduced in size.

  In the static eliminator Z1, the output voltages of the high voltage generation circuits 7 and 8 are applied almost as they are to the discharge electrodes 15 without lowering the voltages. Therefore, if the voltage applied to the discharge electrode 15 is ± 7 kV, the output voltages of the high voltage generation circuits 7 and 8 may be +7 kV and −7 kV. From the above, it is possible to downsize each of the high voltage generation circuits 7 and 8 as compared with a circuit that requires an output voltage that is twice the voltage applied to the discharge electrode 15.

  Moreover, the static eliminator Z1 has a circuit configuration in which the second resistor R2 bears a high voltage of about 7 kV generated by the high voltage generation circuit 7. Therefore, no high voltage is applied to the secondary side of the second transformer 6b. Therefore, it is not necessary to use a special transformer with a high withstand voltage for the second transformer 6b, so that the static elimination device Z can be reduced in cost.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, as an example of the circuit of the static eliminator Z1, the discharge electrode 15 is attached to the output terminal 87 of the high-voltage generating circuit 8 on the negative polarity side.

  The second embodiment is different from the first embodiment in that the discharge electrode 15 is attached to the output terminal 77 of the high-voltage generating circuit 7 on the positive polarity side. And the insertion position of 2nd resistance R2 and the installation position of the connection line L are changed with the change of the attachment position of the discharge electrode 15. FIG.

  Specifically, in the second embodiment, the ground-side terminal F1 among the secondary-side terminals of the first transformer 6a and the corresponding input terminal 76 of the high-voltage generation circuit 7 are connected by the second resistor R2. ing. Further, the connection line L connects the input terminal 76 that is the connection point on the high voltage generation circuit 7 side of the second resistor R2 and the output terminal 87 of the high voltage generation circuit 8 on the negative polarity side. Other than that, the circuit configuration is the same as that of the first embodiment.

  As in the case of the static eliminator Z1 of the first embodiment, the static eliminator Z2 of the second embodiment turns on the switch 3a by the control circuit 20 and outputs the switch 3b in the opposite manner when outputting a positive high voltage. Is done.

  When the switch 3a is turned on, the first transformer 6a is energized to operate. As a result, a secondary voltage (E in this case) of a level obtained by multiplying the primary voltage applied to the primary side by the turn ratio is generated on the secondary side of the first transformer 6a. Applied between terminals 75 and 76. Since the polarity of the secondary voltage E of the first transformer 6a is periodically switched between positive and negative, the polarity of the secondary voltage E applied to both input terminals 75 and 76 of the high voltage generation circuit 7 is also switched periodically between positive and negative.

  Then, in the high voltage generation circuit 7, each time the polarity of the applied secondary voltage E is switched, the diodes D1 to D6 are sequentially turned on, and the capacitors C1 to C6 are sequentially charged. From the above, as shown in FIG. 7, a voltage (about 7 kv) that is about 6 times the secondary voltage E is generated at the output terminal 77 of the high voltage generation circuit 7.

  When the high voltage generating circuit 7 generates an output, a current flows through the first resistor R1, and an output voltage (a high voltage of about 7 kV) of the high voltage generating circuit 7 is applied to both ends of the first resistor R1. Therefore, the output voltage (high voltage of about 7 kV) of the high voltage generation circuit 7 is applied to the discharge electrode 15 as it is.

  The capacitors C1 to C6 of the high voltage generation circuit 7 maintain the charged state while the switch 3a is turned on, but when the switch 3a is turned off, the charged charge is discharged by the first resistor R1 ( The route indicated by a thick line in FIG. 7 is returned to the original state.

  When a negative high voltage is output, the switch 3b is turned on by the control circuit 20, and the switch 3a is turned off.

  When the switch 3b is turned on, the second transformer 6b is energized to operate. As a result, a secondary voltage (here, E) having a level obtained by multiplying the primary voltage applied to the primary side by the turn ratio is generated on the secondary side of the second transformer 6b. Applied between 85 and 86. Since the polarity of the secondary voltage E of the second transformer 6b is periodically switched between positive and negative, the polarity of the secondary voltage E applied to both input terminals 85 and 86 of the high voltage generation circuit 8 is also switched periodically between positive and negative.

  Then, in the high voltage generation circuit 8, each time the polarity of the applied secondary voltage E is switched, the diodes D7 to D12 are sequentially turned on, and the capacitors C7 to C12 are sequentially charged. From the above, as shown in FIG. 8, a voltage (about −7 kv) that is about −6 times the secondary voltage E is generated at the output terminal 87 of the high voltage generation circuit 8.

  At this time, a current flows through the second resistor R2, and an output voltage (a high voltage of about −7 kV) of the high voltage generation circuit 8 is applied to both ends of the second resistor R2. Therefore, the output voltage (high voltage of about −7 kV) of the high voltage generation circuit 8 is applied to the discharge electrode 15 as it is.

  In this case, the second resistor R2 is provided between the ground-side terminal F1 of the secondary-side terminals of the second transformer 6a and the corresponding input terminal 76 of the high-voltage generating circuit 7. The voltage of the secondary side terminal (ground side terminal) F1 of the second transformer 6a is zero volts, and no high voltage is applied. Therefore, it is possible to use a normal transformer with a low withstand voltage as the second transformer 6a.

  The capacitors C7 to C12 of the high voltage generation circuit 8 maintain the charged state while the switch 3b is turned on, but when the switch 3b is turned off, the charged charge is discharged by the second resistor R2. (The route indicated by the thick line in FIG. 8), the original state is restored.

  As described above, the static eliminator Z2 of the second embodiment also uses the discharge electrode 15 in common between the positive polarity high voltage generation circuit 7 and the negative polarity high voltage generation circuit 8 in the same manner as the static eliminator Z1 of the first embodiment. . Therefore, the number of parts can be reduced, and the static eliminator Z2 can be reduced in size.

  In the static eliminator Z2, the output voltages of the high voltage generation circuits 7 and 8 are applied almost as they are to the discharge electrode 15 without lowering the voltage. Therefore, if the voltage applied to the discharge electrode 15 is ± 7 kV, the output voltages of the high voltage generation circuits 7 and 8 may be +7 kV and −7 kV. From the above, it is possible to downsize each of the high voltage generation circuits 7 and 8 as compared with a circuit that requires an output voltage that is twice the voltage applied to the discharge electrode 15.

  Moreover, the static eliminator Z2 has a circuit configuration in which the second resistor R2 bears a high voltage of about −7 kV generated by the high voltage generation circuit 8. Therefore, a high voltage is not applied to the secondary side (grounding end F1) of the first transformer 6a. Therefore, it is not necessary to use a special transformer with a high withstand voltage for the second transformer 6a, so that the static elimination device Z2 can be reduced in cost.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, a DC power source is used as the power source 1. The power source 1 is not limited to a DC power source, and an AC power source can be used. In this case, the oscillation circuit can be eliminated.

  (2) In the above embodiment, as an example of the high voltage generation circuits 7 and 8, the half-wave voltage doubler rectifier circuit is shown in three stages, but the number of connection stages is not limited to three. Other stages may be used.

  (3) In the above embodiment, the example in which the power source 1 is shared between the high voltage generation circuits 7 and 8 has been described. However, a configuration may be adopted in which a power source is provided for each of the high voltage generation circuits 7 and 8.

DESCRIPTION OF SYMBOLS 1 ... Power supply 3a ... Switch 3b ... Switch 6a ... 1st transformer 6b ... 2nd transformer 7 ... Positive voltage side high voltage generation circuit ("positive polarity side high voltage generation of this invention Equivalent to "circuit")
8 ... Negative side high voltage generation circuit (corresponding to "Negative side high voltage generation circuit" of the present invention)
77 ... Output terminal (corresponding to "first output terminal" of the present invention)
87... Output terminal (corresponding to "second output terminal" of the present invention)
15 ... discharge electrode 20 ... control circuit (corresponding to "control means" of the present invention)
F1, F2 ... ground side terminal R1 ... first resistor R2 ... second resistor L ... connection line Z1, Z2 ... static elimination device

Claims (2)

A first transformer connected to a power source and fed by the power source;
A positive-side high-voltage generating circuit that is provided on the secondary side of the first transformer and boosts the secondary voltage of the first transformer to generate a positive high voltage at the first output terminal;
A second transformer connected in parallel to the first transformer with respect to the power source and fed from the power source, or fed from another power source different from the power source;
A negative-side high-voltage generating circuit that is provided on the secondary side of the second transformer and boosts the secondary voltage of the second transformer to generate a negative high voltage at the second output terminal;
Control means for performing switching control for alternately connecting the power source to the first transformer side and the second transformer side;
A discharge electrode connected to the second output terminal;
A first resistor connecting the first output terminal and the second output terminal;
A second resistor that connects a ground-side terminal among the secondary-side terminals of the second transformer and an input terminal of the negative-side high-voltage generating circuit that is the counterpart of the terminal;
A static eliminator comprising: a connection line on the negative polarity side high voltage generation circuit side of the second resistor; and a connection line connecting the first output terminal of the positive polarity side high voltage generation circuit. A first transformer connected to a power source and fed by the power source;
A positive-side high-voltage generating circuit that is provided on the secondary side of the first transformer and boosts the secondary voltage of the first transformer to generate a positive high voltage at the first output terminal;
A second transformer connected in parallel to the first transformer with respect to the power source and fed from the power source, or fed from another power source different from the power source;
A negative-side high-voltage generating circuit that is provided on the secondary side of the second transformer and boosts the secondary voltage of the second transformer to generate a negative high voltage at the second output terminal;
Control means for performing switching control for alternately connecting the power source to the first transformer side and the second transformer side;
A discharge electrode connected to the first output terminal;
A first resistor connecting the first output terminal and the second output terminal;
A second resistor that connects a ground-side terminal among the secondary-side terminals of the first transformer and an input terminal of the positive-side high-voltage generating circuit that is the counterpart of the terminal;
A static eliminator comprising a connection point on the positive polarity side high voltage generation circuit side of the second resistance and a connection line connecting the second output terminal of the negative polarity side high voltage generation circuit.

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