Patent ID: 11949346
Assignee: HL MANDO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 17:
18. A method performed in an inverter apparatus, the method comprising:
supplying, by a filter module of the inverter apparatus, an AC output voltage obtained by filtering an AC voltage output from an inverter circuit module of the inverter apparatus to a load, the filter module including no damping resistor;
calculating, by a control module of the inverter apparatus, a control signal for controlling the inverter circuit module by receiving a feedback on the AC output voltage; and
controlling, by a switch driver module of the inverter apparatus, switching elements in the inverter circuit module to be turned on or off according to the control signal,
wherein the calculating of the control signal comprises calculating the control signal by reflecting a virtual damping component corresponding to a value of a virtual damping resistor,
wherein the calculating of the control signal comprises:
outputting a voltage control signal, based on an error value that is a difference between a reference voltage and the AC output voltage;
outputting a damping control signal by reflecting the virtual damping component to the AC output voltage; and
calculating the control signal from a signal obtained by subtracting the damping control signal from the voltage control signal, in consideration of the AC voltage, and
wherein the outputting of the voltage control signal comprises calculating the voltage control signal by integrating the error value and applying an integral gain to the integrated error value.