High voltage power supply for static neutralizers
AssigneeIllinois Tool Works Inc.
InventorsStuart Neubarth, Michael A. Lehr, Scott Gehlke, Peter Gefter
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Abstract
A high voltage power supply for a static neutralizer is disclosed. The high voltage power supply includes a resonant converter and a load with an emitter module having an emitter, reference electrode, and a capacitance value. The resonant converter is disposed to have a resonant frequency and an output coupled to the load. The resonant converter generates an output waveform with an amplitude sufficient for generating to ions by corona discharge when the load receives the output waveform. The load is predominantly capacitive when the resonant converter is operating at the resonant frequency.
Claims39
A high voltage power supply for a static neutralizer, comprising:
- a load that includes an emitter module having an emitter, reference electrode and a capacitance value;
- a resonant converter having a resonant frequency and an output electrically coupled to said load, said resonant converter for generating an output waveform at said output that has an amplitude sufficient for generating ions by corona discharge when said load receives said output waveform;
- and
- wherein said load is predominantly capacitive when said resonant converter is operating at said resonant frequency.
A resonant converter for use with a power supply of a static neutralizer, said static neutralizer including a waveform output and an emitter module having at least one emitter and a reference electrode;
- said power supply including a DC power supply having an output, said resonant converter comprising:
- a transformer that includes a primary winding, a secondary winding, and a core;
- a commutation circuit coupled to said transformer and for receiving a current from said output of said DC power supply;
- a load having a first end coupled to the waveform output and including the emitter module;
- a sensing circuit that generates a feedback signal, said feedback signal provided to said commutation circuit;
- and
- wherein said load is predominantly capacitive during operation of said resonant converter.
The resonant converter of 17, wherein said commutation circuit further includes a control circuit that controls said switching circuit in response to said feedback signal.
A high voltage power supply for a static neutralizer, comprising:
- a load that includes an emitter module having an emitter, reference electrode and a capacitance value;
- a resonant converter having a resonant frequency,
- an output electrically coupled to said load,
- a transformer that includes a primary winding and a secondary winding,
- a commutation circuit having a switching circuit, said commutation circuit delivers energy from a DC power supply through an isolation circuit to said primary winding and uses said feedback signal to maintain an oscillation within said resonant converter,
- a sensing circuit for generating a feedback signal,
- said resonant converter for generating an output waveform at said output that has an amplitude sufficient for generating to ions by corona discharge when said load receives said output waveform;
- wherein said load is predominantly capacitive when said resonant converter is operating at said resonant frequency;
- and
- wherein said secondary winding and said load have a total inductance equal to:
- L
- R
- =
- 1
- (
- 2
-
-
- π
-
-
- F
- )
- 2
-
- C
- R
- wherein LR is the total inductance of said secondary winding and said load, CR is the capacitance of said load, and F is a desired operating frequency of the resonant converter.
A resonant converter for use with a power supply of a static neutralizer, said resonant converter comprising:
- the power supply including a DC power supply having an output;
- the static neutralizer including a waveform output and an emitter module having at least one emitter and a reference electrode;
- a transformer that includes a primary winding, a secondary winding, and a core;
- a commutation circuit coupled to said transformer and for receiving a current from said output of said DC power supply;
- a load having a first end coupled to the waveform output and including the emitter module;
- a sensing circuit that generates a feedback signal, said feedback signal provided to said commutation circuit;
- wherein said load is predominantly capacitive during operation of said resonant converter;
- an inductance set that includes at least one inductive element connected in series with said secondary winding;
- and
- wherein said secondary winding, said inductance set and said load are part of a secondary tank circuit that has a total inductance equal to:
- L
- R
- =
- 1
- (
- 2
-
-
- π
-
-
- F
- )
- 2
-
- C
- R
- wherein LR is the total inductance of said secondary tank circuit, CR is the capacitance of said load, and F is a desired operating frequency of the resonant converter.
Dependencies are inferred from the claim text.