Patents by Inventor Yongkai Liao
Yongkai Liao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230308136Abstract: The present disclosure provides a wireless communication device and a control method thereof. The wireless communication device includes a first communication control module and a second communication control module.Type: ApplicationFiled: February 23, 2023Publication date: September 28, 2023Applicant: Delta Electronics (Shanghai) CO., LTDInventors: Yongkai LIAO, Yibo WANG, Ulrich RICHTER, Qing JIANG, Xuecong XU
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Publication number: 20230307964Abstract: The present disclosure provides a wireless charging system and a control method thereof. The control method includes: when the battery pack is in over-discharged state, controlling the power transmitting module to wirelessly transmit first preset power, i.e.Type: ApplicationFiled: February 15, 2023Publication date: September 28, 2023Applicant: Delta Electronics (Shanghai) CO., LTDInventors: Yongkai LIAO, Xuecong XU, Qing JIANG
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Patent number: 11770025Abstract: Provided are a wireless power transmission apparatus and a control method thereof. The apparatus includes a transmitting unit which includes an inverter circuit, a first compensation circuit, and a transmitting coil; a receiving unit which includes a receiving coil, a second compensation circuit, and a rectifier circuit; a power regulation unit configured to regulate an output signal of the wireless power transmission apparatus; and a control unit configured to: acquire a voltage-and-current phase difference of the transmitting unit, a detection signal, and a power detection value of the wireless power transmission apparatus; control an operating frequency of the inverter circuit according to the voltage-and-current phase difference and a preset phase difference, and generate a power derating signal according to the detection signal, and control, according to the power derating signal, the power detection value and a power reference signal, the power regulation unit to regulate the output signal.Type: GrantFiled: July 5, 2021Date of Patent: September 26, 2023Assignee: Delta Electronics (Shanghai) Co., Ltd.Inventors: Qing Jiang, Yongkai Liao, Min Xu, Shunyang Ji
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Patent number: 11670971Abstract: The present application provides a wireless power transmission device and a foreign object detection method thereof. The method includes: acquiring an input current of a transmitting unit of the wireless power transmission device and a temperature of a transmitting coil in the transmitting unit; determining a first current reference value according to the temperature of the transmitting coil; and determining a foreign object detection result according to the input current and the first current reference value corresponding to the temperature of the transmitting coil. By detecting the input current of the transmitting unit of the wireless power transmission device, it is determined whether there is a foreign object in a transmission space of the wireless power transmission device. Moreover, a temperature detection unit is added, and adjustment is made to a current threshold according to the temperature of the coil, thereby achieving more accurate foreign object detection.Type: GrantFiled: September 10, 2021Date of Patent: June 6, 2023Assignee: Delta Electronics (Shanghai) Co., Ltd.Inventors: Gang Yang, Yongkai Liao, Xuecong Xu
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Publication number: 20220149667Abstract: The present application provides a wireless power transmission device and a foreign object detection method thereof. The method includes: acquiring an input current of a transmitting unit of the wireless power transmission device and a temperature of a transmitting coil in the transmitting unit; determining a first current reference value according to the temperature of the transmitting coil; and determining a foreign object detection result according to the input current and the first current reference value corresponding to the temperature of the transmitting coil. By detecting the input current of the transmitting unit of the wireless power transmission device, it is determined whether there is a foreign object in a transmission space of the wireless power transmission device. Moreover, a temperature detection unit is added, and adjustment is made to a current threshold according to the temperature of the coil, thereby achieving more accurate foreign object detection.Type: ApplicationFiled: September 10, 2021Publication date: May 12, 2022Inventors: Gang YANG, Yongkai LIAO, Xuecong XU
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Publication number: 20220085649Abstract: Provided are a wireless power transmission apparatus and a control method thereof. The apparatus includes a transmitting unit which includes an inverter circuit, a first compensation circuit, and a transmitting coil; a receiving unit which includes a receiving coil, a second compensation circuit, and a rectifier circuit; a power regulation unit configured to regulate an output signal of the wireless power transmission apparatus; and a control unit configured to: acquire a voltage-and-current phase difference of the transmitting unit, a detection signal, and a power detection value of the wireless power transmission apparatus; control an operating frequency of the inverter circuit according to the voltage-and-current phase difference and a preset phase difference, and generate a power derating signal according to the detection signal, and control, according to the power derating signal, the power detection value and a power reference signal, the power regulation unit to regulate the output signal.Type: ApplicationFiled: July 5, 2021Publication date: March 17, 2022Inventors: Qing JIANG, Yongkai LIAO, Min XU, Shunyang JI
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Patent number: 11025304Abstract: The present disclosure provides a wireless power transmission system and a data transmission method, where the system includes: a first processing module configuring a first communication module according to a block of first preset configuration information, output a first digital signal according to the block of first preset configuration information, and input the first digital signal to the driving module and a second processing module detecting a power signal of the second circuit, obtaining a block of second preset configuration information according to the power signal, and configuring the second communication module according to the block of second preset configuration information. The wireless power transmission system and the data transmission method provided in the present disclosure reduce structural complexity of the device in the case that one-to-one communications is realized.Type: GrantFiled: March 28, 2019Date of Patent: June 1, 2021Assignee: DELTA ELECTRONICS, INC.Inventors: Shuailin Du, Jian Zhou, Yongkai Liao, Xuecong Xu, Kaining Tan
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Patent number: 10965173Abstract: A distance detection method and system for a wireless power transmission device are disclosed. The wireless power transmission device includes a transmitter circuit and a receiver circuit, wherein a transmitting coil of the transmitter circuit and a receiving coil of the receiver circuit form an inductive circuit via magnetic coupling. The distance detection method includes: calculating an inductance value of a magnetizing inductance of the inductive circuit according to electrical parameters of the receiver circuit and electrical parameters of the transmitter circuit; and calculating a distance between the transmitting coil and the receiving coil according to the inductance value of the magnetizing inductance of the inductive circuit.Type: GrantFiled: December 10, 2019Date of Patent: March 30, 2021Assignee: DELTA ELECTRONICS, INC.Inventors: Shuailin Du, Yongkai Liao
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Patent number: 10923950Abstract: A power generating method for a wireless power transmission device includes the following steps. Firstly, a power transmitting circuit is switched between an enabled state and a disabled state. When the power transmitting circuit is in the enabled state, the power transmitting circuit emits a first power and the power receiving circuit converts the first power into a second power. Then, the second power is converted into an output power, and the second power is converted into an auxiliary power. If the first power is not received by a power receiving circuit, the above steps are repeated. If the first power is received by the power receiving circuit, the power transmitting circuit is continuously in the enabled state, so that the auxiliary power is continuously generated.Type: GrantFiled: June 20, 2018Date of Patent: February 16, 2021Assignee: DELTA ELECTRONICS (THAILAND) PUBLIC COMPANY LIMITEDInventors: Yongkai Liao, Shuailin Du, Shuyang Wang, Kai Dong, Jinfa Zhang
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Patent number: 10923268Abstract: The present disclosure provides a wireless power transmitting module and an installation method thereof, wherein the wireless power transmitting module comprises: an insulating bracket, a first side of which has a first central space; a coil, disposed around the first central space; and a circuit component, at least a part of which is located in the first central space, electrically connected to the coil. The present disclosure makes full use of the central blank space of the coil, and places the circuit component at the center of the coil, thereby realizing a miniaturized structure, improving space utilization and greatly reducing volume.Type: GrantFiled: September 9, 2019Date of Patent: February 16, 2021Assignee: Delta Electronics, Inc.Inventors: Liangsong Che, Tianding Hong, Shuailin Du, Yongkai Liao, Meng Wang
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Patent number: 10811907Abstract: A wireless power transmission device includes a transmitter unit and a receiver unit. The transmitter unit converts an input DC power into an inverted AC power, the receiver unit receives the AC power through a coupling effect. A fault protection method is also provided in the present disclosure. If the receiver unit is abnormal, a main power circuit of the receiver unit is short-circuited. Then, a phase relationship between an inverted AC voltage and an inverted AC current of the inverted AC power is detected. A phase judgment signal is generated according to the phase relationship. An overcurrent judgment signal is generated according to the amplitude of the inverted AC current and a predetermined current threshold. A fault signal is generated according to the phase judgment signal and the overcurrent judgment signal. In response to the fault signal, the wireless power transmission device is controlled to shut down.Type: GrantFiled: April 20, 2018Date of Patent: October 20, 2020Assignee: DELTA ELECTRONICS (THAILAND) PUBLIC COMPANY LIMITEDInventors: Shuailin Du, Yongkai Liao, Kai Dong, Jinfa Zhang
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Patent number: 10797521Abstract: A control circuit for a wireless power transmission device is provided. The wireless power transmission device includes a transmitter unit and a receiver unit. The control circuit includes a transmitter detecting unit, a first control unit and a driver unit. The transmitter detecting unit obtains an input power of the transmitter unit and generates an input power signal. The first control unit generates a control signal according to a result of comparing the input power signal with a reference input power signal. The driver unit drives switching devices of the transmitter unit according to the control signal. Consequently, the input power of the transmitter unit is adjusted, and an output ripple or a magnitude of the output of the receiver unit is adjusted.Type: GrantFiled: July 25, 2018Date of Patent: October 6, 2020Assignee: DELTA ELECTRONICS (THAILAND) PUBLIC COMPANY LIMITEDInventors: Shuailin Du, Yongkai Liao
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Patent number: 10797533Abstract: A wireless power transmission device includes a contactless transmitter unit, a contactless receiver unit and a step-down transformer. The transmitter unit receives an input AC power. A receiver coil of the receiver unit and a transmitter coil of the transmitter coil are electromagnetically coupled with each other. The input AC power is electromagnetically coupled to the receiver coil through the transmitter coil. Consequently, the input AC power is converted into a first output AC power. A first coil and a second coil of the step-down transformer are electromagnetically coupled with each other. The first coil is electrically connected with the receiver coil to receive the first output AC power. A second output AC power is outputted from the second coil. A turn ratio of the first coil to the second coil is larger than a turn ratio of the transmitter coil to the receiver coil.Type: GrantFiled: March 1, 2018Date of Patent: October 6, 2020Assignee: DELTA ELECTRONICS (THAILAND) PUBLIC COMPANY, LIMITEDInventors: Shuailin Du, Yongkai Liao, Kai Dong, Jinfa Zhang
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Publication number: 20200204012Abstract: A distance detection method and system for a wireless power transmission device are disclosed. The wireless power transmission device includes a transmitter circuit and a receiver circuit, wherein a transmitting coil of the transmitter circuit and a receiving coil of the receiver circuit form an inductive circuit via magnetic coupling. The distance detection method includes: calculating an inductance value of a magnetizing inductance of the inductive circuit according to electrical parameters of the receiver circuit and electrical parameters of the transmitter circuit; and calculating a distance between the transmitting coil and the receiving coil according to the inductance value of the magnetizing inductance of the inductive circuit.Type: ApplicationFiled: December 10, 2019Publication date: June 25, 2020Inventors: Shuailin DU, Yongkai LIAO
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Publication number: 20200111600Abstract: The present disclosure provides a wireless power transmitting module and an installation method thereof, wherein the wireless power transmitting module comprises: an insulating bracket, a first side of which has a first central space; a coil, disposed around the first central space; and a circuit component, at least a part of which is located in the first central space, electrically connected to the coil. The present disclosure makes full use of the central blank space of the coil, and places the circuit component at the center of the coil, thereby realizing a miniaturized structure, improving space utilization and greatly reducing volume.Type: ApplicationFiled: September 9, 2019Publication date: April 9, 2020Applicant: Delta Electronics,Inc.Inventors: Liangsong CHE, Tianding HONG, Shuailin DU, Yongkai LIAO, Meng WANG
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Publication number: 20190319674Abstract: The present disclosure provides a wireless power transmission system and a data transmission method, where the system includes: a first processing module configuring a first communication module according to a block of first preset configuration information, output a first digital signal according to the block of first preset configuration information, and input the first digital signal to the driving module and a second processing module detecting a power signal of the second circuit, obtaining a block of second preset configuration information according to the power signal, and configuring the second communication module according to the block of second preset configuration information. The wireless power transmission system and the data transmission method provided in the present disclosure reduce structural complexity of the device in the case that one-to-one communications is realized.Type: ApplicationFiled: March 28, 2019Publication date: October 17, 2019Inventors: Shuailin DU, Jian ZHOU, Yongkai LIAO, Xuecong XU, Kaining TAN
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Publication number: 20190222064Abstract: A wireless power transmission device includes a transmitter unit and a receiver unit. The transmitter unit converts an input DC power into an inverted AC power, the receiver unit receives the AC power through a coupling effect. A fault protection method is also provided in the present disclosure. If the receiver unit is abnormal, a main power circuit of the receiver unit is short-circuited. Then, a phase relationship between an inverted AC voltage and an inverted AC current of the inverted AC power is detected. A phase judgment signal is generated according to the phase relationship. An overcurrent judgment signal is generated according to the amplitude of the inverted AC current and a predetermined current threshold. A fault signal is generated according to the phase judgment signal and the overcurrent judgment signal. In response to the fault signal, the wireless power transmission device is controlled to shut down.Type: ApplicationFiled: April 20, 2018Publication date: July 18, 2019Inventors: Shuailin Du, Yongkai Liao, Kai Dong, Jinfa Zhang
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Publication number: 20190081510Abstract: A power generating method for a wireless power transmission device includes the following steps. Firstly, a power transmitting circuit is switched between an enabled state and a disabled state. When the power transmitting circuit is in the enabled state, the power transmitting circuit emits a first power and the power receiving circuit converts the first power into a second power. Then, the second power is converted into an output power, and the second power is converted into an auxiliary power. If the first power is not received by a power receiving circuit, the above steps are repeated. If the first power is received by the power receiving circuit, the power transmitting circuit is continuously in the enabled state, so that the auxiliary power is continuously generated.Type: ApplicationFiled: June 20, 2018Publication date: March 14, 2019Inventors: Yongkai Liao, Shuailin Du, Shuyang Wang, Kai Dong, Jinfa Zhang
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Publication number: 20190058357Abstract: A control circuit for a wireless power transmission device is provided. The wireless power transmission device includes a transmitter unit and a receiver unit. The control circuit includes a transmitter detecting unit, a first control unit and a driver unit. The transmitter detecting unit obtains an input power of the transmitter unit and generates an input power signal. The first control unit generates a control signal according to a result of comparing the input power signal with a reference input power signal. The driver unit drives switching devices of the transmitter unit according to the control signal. Consequently, the input power of the transmitter unit is adjusted, and an output ripple or a magnitude of the output of the receiver unit is adjusted.Type: ApplicationFiled: July 25, 2018Publication date: February 21, 2019Inventors: Shuailin Du, Yongkai Liao
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Publication number: 20180254672Abstract: A wireless power transmission device includes a contactless transmitter unit, a contactless receiver unit and a step-down transformer. The transmitter unit receives an input AC power. A receiver coil of the receiver unit and a transmitter coil of the transmitter coil are electromagnetically coupled with each other. The input AC power is electromagnetically coupled to the receiver coil through the transmitter coil. Consequently, the input AC power is converted into a first output AC power. A first coil and a second coil of the step-down transformer are electromagnetically coupled with each other. The first coil is electrically connected with the receiver coil to receive the first output AC power. A second output AC power is outputted from the second coil. A turn ratio of the first coil to the second coil is larger than a turn ratio of the transmitter coil to the receiver coil.Type: ApplicationFiled: March 1, 2018Publication date: September 6, 2018Inventors: Shuailin Du, Yongkai Liao, Kai Dong, Jinfa Zhang