Pulse discharge power supply and pulse discharge generating method

Patent metadata

Field	Value
Publication number	US-10710909-B2
Application number	US-201616323833-A
Country	US
Kind code	B2
Filing date	Sep 8, 2016
Priority date	Sep 8, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

One of the purposes is to provide a pulse discharge power supply for use in generating pulse discharge. The pulse discharge power supply includes a pulse generation unit, a control circuit, an electric current detector and an electric current signal processing unit. The pulse generation unit generates a first pulse, and applies it to a discharge load for generating pulse discharge. The electric current detector detects an electric current flowing into the discharge load in accordance with the application of the pulse. The electric current signal processing unit outputs into the control circuit a signal based on an integration result of the electric current having been detected. The control circuit controls the generation of a second pulse in the pulse generation unit based on the signal being received.

First claim

What is claimed is:

1. A pulse discharge power supply for introducing pulse discharge by outputting a voltage pulse for a plurality of times to a discharge load being a target of the pulse discharge, the pulse discharge power supply, comprising:
a pulse generator circuit including a capacitor discharge circuit configured to output a first voltage pulse, and output a second voltage pulse after outputting the first voltage pulse, the first voltage pulse being generated by superposition of a first plurality of pulses, the second voltage pulse being generated by superposition of a second plurality of pulses; and
a control circuit configured to control an output of the second voltage pulse based on an integration value of an electric current flowing into the discharge load with respect to the first voltage pulse.

2. The pulse discharge power supply as set forth in claim 1 , wherein
the pulse generator circuit comprises:
a first pulse generator circuit configured to generate a first single stage pulse with respect to the first voltage pulse and a second single stage pulse with respect to the second voltage pulse as the first plurality of pulses;
a second pulse generator circuit configured to generate a third single stage pulse with respect to the first voltage pulse, and a fourth single stage pulse with respect to the second voltage pulse as the second plurality of pulses; and
an inductive pulse adder circuit configured to generate the first voltage pulse by performing superposition of the first single stage pulse and the third single stage pulse on each other, and to generate the second voltage pulse by performing superposition of the second single stage pulse and the fourth single stage pulse on each other.

3. The pulse discharge power supply as set forth in claim 2 , further comprising:
an integrator circuit configured to calculate said integration value, wherein
the control circuit is configured to perform a control, based on the integration value calculated by the integrator circuit, so that a duration time of the second single stage pulse with respect to the second voltage pulse is reduced more than a duration time of the first pulse.

4. The pulse discharge power supply as set forth in claim 3 , wherein the control circuit is configured to perform a control, based on the integration value calculated by the integrator circuit, so that a duration time of the fourth single stage pulse with respect to the second voltage pulse is reduced more than that of the third single stage pulse with respect to the first voltage pulse.

5. The pulse discharge power supply as set forth in claim 2 , further comprising:
an integrator circuit configured to calculate said integration value, wherein
the control circuit is configured to perform a control, based on an integration value being calculated by the integrator circuit, so that a voltage value of the second single stage pulse with respect to the second voltage pulse is reduced more than a voltage value of the first pulse.

6. The pulse discharge power supply as set forth in claim 5 , further comprising:
the integrator circuit configured to calculate said integration value, wherein
the control circuit is configured to perform a control, based on the integration value calculated by the integrator circuit, so that a pulse-to-pulse period between the first and third single stage pulses and the second and fourth single stage pulses is extended more than a pulse-to-pulse period of preceding first and third single stage pulses.

7. The pulse discharge power supply as set forth in claim 5 , wherein the control circuit is configured to perform a control, based on the integration value calculated by the integrator circuit, so that a voltage value of the fourth single stage pulse with respect to the second voltage pulse is reduced more than that of the third single stage pulse with respect to the first voltage pulse.

8. The pulse discharge power supply as set forth in claim 5 , wherein
the control circuit is configured to output an integration preparation instruction for promoting to reset an integration value; and
the integrator circuit is configured to receive the integration preparation instruction and starts, after resetting the integration value, a calculation of another integration value related to an electric current flowing into the discharge load with respect to the second voltage pulse.

9. The pulse discharge power supply as set forth in claim 8 , further comprising:
an electric current detector circuit configured to detect an electric current flowing into the discharge load with respect to the first voltage pulse; and
a delay circuit configured to, based on receipt of the integration preparation instruction, generate an integration commencement instruction to start a calculation of said another integration value, wherein
the integrator circuit is configured to receive the integration commencement instruction after the integrator circuit resets an integration value in response to receiving the integration preparation instruction and after the electric current detector circuit performs detection for a predetermined time-duration, and starts a calculation of said another integration value.

10. The pulse discharge power supply as set forth in claim 8 , further comprising:
a voltage detector circuit configured to detect a voltage waveform produced on the discharge load with respect to the first voltage pulse, wherein
the integrator circuit is configured to start a calculation of said another integration value when a voltage value of the discharge load reaches a predetermined voltage value on a rising edge of the voltage waveform or a trailing edge thereof.

11. The pulse discharge power supply as set forth in claim 1 , further comprising:
a comparator circuit configured to store a criterion value, compare the criterion value with said integration value, and output a comparison result, wherein
the control circuit controls an output of the second voltage pulse when the comparison result indicates that the integration value exceeds the criterion value.

12. The pulse discharge power supply as set forth in claim 1 , further comprising:
a counter circuit configured to count a number of events where the control circuit performs a control on an output with respect to a voltage pulse outputted for a plurality of times; and
a display configured to display a display based on a number of events counted by the counter circuit.

13. The pulse discharge power supply as set forth in claim 1 , wherein the pulse generator circuit is made of a marx circuit configured to perform superposition by electrical conduction.

14. A pulse discharge generating method for generating pulse discharge by outputting a voltage pulse for a plurality of times from a pulse discharge power supply to a discharge load being a target of the pulse discharge, the pulse discharge generating method comprising:
outputting, by discharging a capacitor of a pulse generator circuit, a first voltage pulse from the pulse discharge power supply to the discharge load, the first voltage pulse being generated by superposition of a first plurality of pulses;
outputting, by discharging the capacitor of the pulse generator circuit, a second voltage pulse from the pulse discharge power supply to the discharge load after outputting the first voltage pulse, the second voltage pulse being generated by superposition of a second plurality of pulses;
calculating, by an integrator circuit, an integration value of an electric current flowing into the discharge load with respect to the first voltage pulse; and
controlling, by a control circuit, an out

Assignees

• Mitsubishi Electric Corp
• Univ Nagaoka Technology

Inventors

• Inanaga Yasutaka
• Naito Teruki
• Oinuma Gaku
• Jiang Weihua

Classifications

• H01T19/00

  Devices providing for corona discharge (for charging electrographic elements G03G15/02) · CPC title

• B01D53/00

  Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols, (recovery of volatile solvents by condensation B01D5/00; sublimation B01D7/00; cold traps, cold baffles B01D8/00; working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G70/00; cleaning coal gas C10K; working-up of natural gas, or synthetic natural gas, C10L3/10; separation of difficult-to-condense gases or air by liquefaction F25J; for investigating materials G01N30/00) · CPC title

• B01J19/088

  giving rise to electric discharges (for heating purposes H05B7/00; for the production of ozone C01B13/11, H01T19/00) · CPC title

• B01J2219/0877

  Liquid · CPC title

• C02F2201/4614

  Current · CPC title