公开(公告)号：US10951145B2

公开(公告)日：2021-03-16

申请号：US16555815

申请日：2019-08-29

申请人： DELTA ELECTRONICS, INC.

发明人： Chin-Hao Chen ,  Cheng-Chung Li ,  Yu-Min Meng

IPC分类号： H02P1/00 ,  H02P21/02 ,  H02P21/18 ,  H02P27/12 ,  H02P21/34 ,  H02P21/22

摘要： A motor control method adapted for use in the startup process of a sensorless brushless DC (BLDC) motor includes the following steps. A phase voltage signal and a driving voltage signal are generated according to the startup current signal with a first predetermined value and a phase current signal. A driving current signal is generated according to the driving voltage signal to drive the BLDC to rotate. The driving current signal is sensed to generate the corresponding phase current signal. The load state of the shaft end of the BLDC is determined according to the phase voltage signal with the change of the corresponding phase current signal and the startup current signal. The magnitude of the startup current signal is adaptively adjusted according to the load state of the shaft end and/or according to the electric rotation angular velocity and the torque demand of the BLDC motor.

公开(公告)号：US11825584B2

公开(公告)日：2023-11-21

申请号：US17037599

申请日：2020-09-29

申请人： DELTA ELECTRONICS, INC.

发明人： Thiam-Wee Tan ,  Cheng-Chung Li ,  Chun Chang ,  Yu-Min Meng

IPC分类号： H05B6/06 ,  H05B6/04

CPC分类号： H05B6/062 ,  H05B6/04 ,  H05B2206/02

摘要： A heating device includes a first capacitor, a first switch, a second switch, a second capacitor, a third capacitor, a coil and a controller. The first and second switch are coupled in series at a first node, and are coupled with the first capacitor in parallel. The second capacitor is coupled to the first switch. The third capacitor is coupled to the second switch, and is coupled to the second capacitor at a second node. The coil is coupled between the first and the second node. The controller outputs a first and a second control signal to the first switch and the second switch, respectively. After the heating device received a voltage and a starting command, the controller outputs the first and the second control signal to turn on or off the first and the second switch respectively. The duty cycle of the first signal is lower than 50%.

公开(公告)号：US11789090B2

公开(公告)日：2023-10-17

申请号：US17728551

申请日：2022-04-25

申请人： Delta Electronics, Inc.

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

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

CPC分类号： G01R31/40 ,  G05F1/10 ,  H02M1/0009 ,  H02M1/12

摘要： 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.

公开(公告)号：US12089321B2

公开(公告)日：2024-09-10

申请号：US16875477

申请日：2020-05-15

申请人： Delta Electronics, Inc.

发明人： Yu-Min Meng ,  Jhih-Hong Gao ,  Chun-wei Lin ,  Yu-Tsung Lee ,  Chun Chang

IPC分类号： H05B1/02 ,  H02H1/00 ,  H02H3/08 ,  H05B6/04 ,  H05B6/06 ,  H05B6/12

CPC分类号： H05B6/1209 ,  H02H1/0007 ,  H02H3/08 ,  H05B1/0266 ,  H05B6/04 ,  H05B6/062 ,  H05B2213/05

摘要： An induction cooker includes a rectifying device, a first energy-storage device, a switch device, a second energy-storage device, a heating device and a control device. The capacitance of the second energy-storage device is greater than the capacitance of the first energy-storage device. When the induction cooker is just starting, the control device controls the switch device to be turned off, such that the heating device generates an output current according to an energy of the first energy-storage device. The control device determines whether a pot is on the heating device according to a change state of the output current. When the pot is on the heating device, the control device controls the switch device to be turned on, such that the first and second energy-storage devices are coupled, and the heating device heats the pot according to energies of the first and second energy-storage devices.

公开(公告)号：US20230217551A1

公开(公告)日：2023-07-06

申请号：US17689830

申请日：2022-03-08

申请人： Delta Electronics, Inc.

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

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

CPC分类号： H05B6/062 ,  H02M7/537 ,  H05B6/1209 ,  H05B2213/05

摘要： 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.