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US 10,277,143 B1Granted
Inverter supplying power to induction motor for driving hoist
AssigneeLsis Co., Ltd.
InventorsEun-Woo Lee, Jung-Han Kim
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Abstract
The present disclosure relates to an inverter provided in a hoist system, which includes a scale unit configured to control a size of a DC link voltage of the inverter, a proportional-integral (PI) controller configured to perform PI-control on an output of the scale unit and an output voltage of the inverter and outputting a control signal, a first calculating unit configured to sum a command frequency of the inverter and the control signal, and a voltage determining unit configured to determine an output voltage of the inverter from an output frequency of the first calculating unit.
Claims10
An inverter comprising:
- a scale unit configured to control a size of a DC link voltage of the inverter;
- a proportional-integral (PI) controller configured to perform PI-control on an output of the scale unit and an output voltage of the inverter and outputting a control signal;
- a first calculating unit configured to sum a command frequency of the inverter and the control signal;
- and
- a voltage determining unit configured to determine an output voltage of the inverter from an output frequency of the first calculating unit,
- wherein the scale unit converts the size of the DC link voltage to a maximum voltage that can be output from the inverter, and multiplies the converted size of the DC link voltage by a gain K that is less than 1.
3 more elements
Dependencies are inferred from the claim text.