Static Eliminator And Static Elimination Control Method
AssigneeKeyence Corporation
InventorTsukasa Fujita
Life of this patent
Estimating the term…
Abstract
Provided is a static eliminator capable of holding ion balance uniform regardless of a distance from the static eliminator. The static eliminator includes: an electrode driving device that alternately and repeatedly applies, to a discharge electrode, a positive drive voltage and a negative drive voltage as drive voltages for corona discharge; decreases a ratio of the application time of the positive drive voltage while relatively increasing the voltage value of the positive drive voltage in a case of increasing positive ions, and increases the ratio of the application time of the positive drive voltage while relatively decreasing the voltage value of the positive drive voltage in a case of increasing negative ions.
Claims5
A static eliminator, comprising:
- an electrode driving device that alternately and repeatedly applies, to a discharge electrode, a positive drive voltage and a negative drive voltage as drive voltages for corona discharge;
- a voltage value adjusting device that adjusts at least one of a voltage value of the positive drive voltage and a voltage value of the negative drive voltage;
- an application time adjusting device that adjusts at least one of an application time of the positive drive voltage and an application time of the negative drive voltage;
- and
- a drive controlling device that controls an adjustment amount of the voltage value and an adjustment amount of the application time, wherein
- the drive controlling device decreases a ratio of the application time of the positive drive voltage while relatively increasing the voltage value of the positive drive voltage in a case of increasing positive ions, and increases the ratio of the application time of the positive drive voltage while relatively decreasing the voltage value of the positive drive voltage in a case of increasing negative ions.
A static elimination control method, comprising:
- an electrode driving step for alternately and repeatedly applying, to a discharge electrode, a positive drive voltage and a negative drive voltage as drive voltages for corona discharge;
- a voltage value adjusting step for adjusting at least one of a voltage value of the positive drive voltage and a voltage value of the negative drive voltage;
- an application time adjusting step for adjusting at least one of an application time of the positive drive voltage and an application time of the negative drive voltage;
- and
- a drive controlling step for controlling an adjustment amount of the voltage value and an adjustment amount of the application time, wherein
- in the drive controlling step, a ratio of the application time of the positive drive voltage is decreased while the voltage value of the positive drive voltage is relatively decreased in a case of increasing positive ions, and the ratio of the application time of the positive drive voltage is increased while the voltage value of the positive drive voltage is relatively decreased in a case of increasing negative ions.
Dependencies are inferred from the claim text.