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US 11,192,201 B2Granted
Double-power-supply switching control system for a welding machine and method
AssigneeShanghai Hugong Electric (Group) Co., Ltd.
InventorsZhenyu Shu, Lin Nie, Yaomin Zhu
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Abstract
The invention provides a double-power-supply switching control system for a welding machine and method. The welding machine double-power-supply switching control method comprises the steps of: continuously detecting and modifying an input voltage signal by a signal modification unit; under the control of a control unit, judging, by a judgment unit, whether to perform voltage doubling, controlling to execute voltage doubling switching action, and locking an actual input voltage mode of a welding machine by a locking unit; and finally outputting matched output current by a power supply output unit.
Claims17
A double-power-supply switching control system for a welding machine, comprising:
- an input voltage unit for inputting an input voltage signal to a welding machine, wherein the input voltage unit comprises a power supply switching control unit and a rectification and filtering unit;
- wherein the power supply switching control unit is configured for switching the input voltage polarity;
- and the rectification and filtering unit is configured for doubling the input voltage according to the input voltage polarity of the power supply switching control unit;
- a signal modification unit, for performing a continuous detection and modification of the input voltage signal, and outputting a modified input voltage signal, wherein the signal modification unit comprises a switching power supply unit and a peak value holding unit;
- the rectification and filtering unit converts the input voltage signal to an impulse voltage signal;
- and the peak value holding unit filters the impulse voltage signal, holds a peak value signal and outputs a continuous peak value voltage signal;
- a numerical modification unit, for performing a secondary modification on the continuous peak value voltage signal, wherein the numerical modification unit is configured for superimposing a current input voltage signal value to a previous input voltage signal value, repeating the superimposing for a cycle time, and calculating a mean value of the input voltage signal values in the cycle time;
- a power supply output unit for outputting an output voltage and an output current;
- a control unit provided with a judgment unit for receiving said modified input voltage signal and judging whether to perform a voltage doubling and obtaining a judgment result, and a locking unit for locking an actual input voltage mode of the welding machine;
- wherein the control unit controls the input voltage unit to execute a voltage doubling switching action according to the judgment result so as to switch the input voltage signal to a corresponding actual input voltage mode;
- and the control unit further controls the locking unit to lock the corresponding actual input voltage mode;
- and furthermore, the control unit judges whether a preset input voltage mode of the welding machine corresponds to the actual input voltage mode, and controls the power supply output unit to output an output current matched with the preset input voltage mode of the welding machine.
9 more elements
A double-power-supply switching control method for a welding machine, comprising the steps of:
- Step 01, inputting an input voltage signal to a welding machine, performing a continuous detection and modification of the input voltage signal, and outputting a modified input voltage signal;
- performing a secondary modification on the continuous peak value voltage signal, wherein the performing a secondary modification on the continuous peak value voltage signal comprises:
- superimposing a current input voltage signal value to a previous input voltage signal value, repeating the superimposing for a cycle time, and calculating a mean value of the input voltage signal values in the cycle time;
- Step 02, judging whether to perform a voltage doubling according to the modified input voltage signal and obtaining a judgment result;
- Step 03, executing a switching action, switching an actual input voltage mode according to the judgment result, and locking the actual input voltage mode of the welding machine, wherein the actual input voltage mode comprises an actual input voltage doubling mode and an actual input voltage non-doubling mode;
- Step 04, judging whether a preset input voltage mode of the welding machine corresponds to the actual input voltage mode set in step 03;
- and if so, executing step 05;
- and
- Step 05, selecting and outputting an output current matched with the preset input voltage mode,
- wherein the step 01 specifically comprises:
- Sub-step 101, converting the input voltage signal to an impulse voltage signal;
- and
- Sub-step 102, filtering the impulse voltage signal, holding a peak value signal and outputting a continuous peak value voltage signal;
- and the step 02 specifically comprises:
- judging whether the continuous peak value voltage signal is in the preset voltage doubling value range and obtaining a detection result whether to perform the voltage doubling.
12 more elements
Dependencies are inferred from the claim text.