Method and apparatus for receiving a universal input voltage in a welding power source
First Claim
1. A welding power source capable of receiving a range of input voltages, comprising:
- an input rectifier configured to receive any input voltage within the range of input voltages, and configured to provide a first dc signal;
a dc voltage stage configured to receive the first dc signal and providing a second dc signal;
an inverter configured to receive the second dc signal and providing a second ac signal and configured to receive at least one control input;
an output transformer configured to receive the second ac signal and providing a third ac signal having a current suitable for welding;
an output circuit configured to receive the third ac signal and providing a welding signal;
a controller configured to provide at least one control signal to the inverter; and
an auxiliary power source configured to receive any voltage within a range of auxiliary input voltages and configured to provide a control power signal to the controller.
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Abstract
A method and apparatus for providing a welding current is disclosed. The power source is capable of receiving any input voltage over a wide range of input voltages and includes an input rectifier that rectifies the ac input into a dc signal. A dc voltage stage converts the dc signal to a desired dc voltage and an inverter inverts the dc signal into a second ac signal. An output transformer receives the second ac signal and provides a third ac signal that has a current magnitude suitable for welding. The welding current may be rectified and smoothed by an output inductor and an output rectifier. A controller provides control signals to the inverter and an auxiliary power controller that can receive a range of input voltages and provide a control power signal to the controller.
107 Citations
24 Claims
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1. A welding power source capable of receiving a range of input voltages, comprising:
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an input rectifier configured to receive any input voltage within the range of input voltages, and configured to provide a first dc signal; a dc voltage stage configured to receive the first dc signal and providing a second dc signal; an inverter configured to receive the second dc signal and providing a second ac signal and configured to receive at least one control input; an output transformer configured to receive the second ac signal and providing a third ac signal having a current suitable for welding; an output circuit configured to receive the third ac signal and providing a welding signal; a controller configured to provide at least one control signal to the inverter; and an auxiliary power source configured to receive any voltage within a range of auxiliary input voltages and configured to provide a control power signal to the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of providing a welding current from a range of input voltages, comprising:
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rectifying any ac voltage within the range and providing a first dc signal; converting the dc signal to a second ac signal; and transforming the second ac signal into a third ac signal having a current suitable for welding; and
receiving the any ac voltage and providing an auxiliary power signal source at a preselected control power signal voltage, regardless of the magnitude of the ac input signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A welding power source for providing a welding current from a range of input voltages, comprising:
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rectifier means for receiving any voltage within the range and providing a first dc signal; converting means for converting the dc signal to a second ac signal; and transforming means for transforming the second ac signal into a third ac signal having a current suitable for welding; output means for providing a welding current; and auxiliary power means for receiving an auxiliary input voltage and providing an auxiliary power signal source at a preselected control power signal voltage, regardless of the magnitude of the auxiliary input voltage. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification