公开(公告)号：US20230217551A1

公开(公告)日：2023-07-06

申请号：US17689830

申请日：2022-03-08

Applicant: Delta Electronics, Inc.

Inventor： Ming-Shi Huang ,  Zheng-Feng Li ,  Jhih-Cheng Hu ,  Yi-Liang Lin ,  Yu-Min Meng ,  Chun-Wei Lin ,  Chun Chang ,  Thiam Wee Tan

IPC: H05B6/06 ,  H02M7/537 ,  H05B6/12

CPC classification number: H05B6/062 ,  H02M7/537 ,  H05B6/1209 ,  H05B2213/05

Abstract: A heating device includes a resonant circuit, a detection unit and a control unit. The resonant circuit includes an inverter circuit and a resonant tank. The inverter circuit provides a resonant tank current and a resonant tank voltage. The resonant tank includes a heating coil, a resonant tank capacitor, a resonant tank equivalent inductor and a resonant tank equivalent impedance. The detection unit detects the resonant tank current and the resonant tank voltage to acquire associated parameters. The detection unit calculates an inductance of the resonant tank equivalent inductor according to a capacitance of the resonant tank capacitor, a resonant period and a first expression. The detection unit calculates an impedance value of the resonant tank equivalent impedance according to the inductance of the resonant tank equivalent inductor, a time difference, the resonant period, a reference current value, a negative peak current value and a second expression.

公开(公告)号：US20250056684A1

公开(公告)日：2025-02-13

申请号：US18397219

申请日：2023-12-27

Applicant: Delta Electronics, Inc.

Inventor： Ming-Shi Huang ,  Zheng-Feng Li ,  Jhih-Cheng Hu ,  Yi-Min Chen ,  Chun-Wei Lin

IPC: H05B6/06 ,  H05B6/12 ,  H05B6/36

Abstract: A heating device includes a resonant circuit, a detection unit and a control unit. The resonant circuit includes an inverter circuit and a resonant tank. The inverter circuit provides a resonant tank current and a resonant tank voltage. The resonant tank includes a heating coil, a resonant tank capacitor, a resonant tank equivalent inductor and a resonant tank equivalent resistor. The detection unit calculates an inductance of the resonant tank equivalent inductor according to a capacitance of the resonant tank capacitor, a resonant period and a first expression. The detection unit calculates a resistance of the resonant tank equivalent resistor according to the inductance of the resonant tank equivalent inductor, a time change value, a reference voltage value, a negative peak voltage value and a second expression.

公开(公告)号：US11789090B2

公开(公告)日：2023-10-17

申请号：US17728551

申请日：2022-04-25

Applicant: Delta Electronics, Inc.

Inventor： Ming-Shi Huang ,  Zheng-Feng Li ,  Jhih-Cheng Hu ,  Yi-Liang Lin ,  Yu-Min Meng ,  Chun-Wei Lin ,  Chun Chang ,  Thiam-Wee Tan

IPC: G01R31/40 ,  H02M1/12 ,  H02M1/00 ,  G05F1/10

CPC classification number: G01R31/40 ,  G05F1/10 ,  H02M1/0009 ,  H02M1/12

Abstract: A power detection circuit is provided for detecting current total input power of a resonant circuit. The power detection circuit includes a detection circuit and an estimation circuit. The detection circuit receives a current signal and obtains resonant-slot baseband power according to the current signal to generate the baseband power value. The current signal represents a resonant-slot current generated by the resonant circuit. The estimation circuit receives the baseband power value and estimates the current total input power according to the baseband power value to generate an estimated power value.