Patents by Inventor Yi-Kai CHOU
Yi-Kai CHOU 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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Patent number: 11133770Abstract: A motor drive system and a control method are provided. The motor drive system is electrically connected to a motor. The motor drive system includes two safe torque off (STO) modules to achieve a two-channel STO redundancy infrastructure, so as to improve the safety of the motor drive system. In addition, the motor drive system includes a diagnosis module to diagnose malfunction of the STO modules. It ensures the STO modules to meet the related safety requirements.Type: GrantFiled: June 12, 2020Date of Patent: September 28, 2021Assignee: DELTA ELECTRONICS, INC.Inventors: Yi-Jan Chang, Yi-Kai Chou, Po-Sung Chiang, Chien-Hao Chen
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Publication number: 20200403552Abstract: A motor drive system and a control method are provided. The motor drive system is electrically connected to a motor. The motor drive system includes two safe torque off (STO) modules to achieve a two-channel STO redundancy infrastructure, so as to improve the safety of the motor drive system. In addition, the motor drive system includes a diagnosis module to diagnose malfunction of the STO modules. It ensures the STO modules to meet the related safety requirements.Type: ApplicationFiled: June 12, 2020Publication date: December 24, 2020Inventors: Yi-Jan Chang, Yi-Kai Chou, Po-Sung Chiang, Chien-Hao Chen
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Patent number: 10794938Abstract: A voltage detecting circuit includes a rectifying circuit, a voltage dividing circuit, and a comparing circuit. The rectifying circuit is configured to rectify a plurality of AC phase voltages to output a plurality of rectified voltages respectively. The voltage dividing circuit is configured to divide the plurality of rectified voltages respectively to output a plurality of sampling voltages. The comparing circuit is configured to compare the plurality of sampling voltages with a reference voltage respectively to provide a plurality of corresponding phase failure detecting voltages. On the condition that the AC phase voltages are unbalanced, the phase failure detecting voltage switches between a high level and a low level.Type: GrantFiled: August 6, 2018Date of Patent: October 6, 2020Assignee: DELTA ELECTRONICS, INC.Inventors: Yi-Kai Chou, Yi-Jan Chang
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Publication number: 20190250194Abstract: A voltage detecting circuit includes a rectifying circuit, a voltage dividing circuit, and a comparing circuit. The rectifying circuit is configured to rectify a plurality of AC phase voltages to output a plurality of rectified voltages respectively. The voltage dividing circuit is configured to divide the plurality of rectified voltages respectively to output a plurality of sampling voltages. The comparing circuit is configured to compare the plurality of sampling voltages with a reference voltage respectively to provide a plurality of corresponding phase failure detecting voltages. On the condition that the AC phase voltages are unbalanced, the phase failure detecting voltage switches between a high level and a low level.Type: ApplicationFiled: August 6, 2018Publication date: August 15, 2019Inventors: Yi-Kai CHOU, Yi-Jan CHANG
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Patent number: 9848518Abstract: An integrated power module packaging structure includes a plastic housing having a cavity; a plurality of step-shaped pins embedded in the plastic housing, a first printed circuit board disposed in the cavity, and a second printed circuit board disposed above the first printed circuit board in the cavity. Each of the step-shaped pins includes a first L-shaped bending portion and a second L-shaped bending portion connected to each other. The first printed circuit board is disposed with at least a power device and is electrically connected to at least a part of the first L-shaped bending portions. Two opposite surfaces of the second printed circuit board are respectively disposed with at least an electronic device, and the second printed circuit board is electrically connected to at least a part of the second L-shaped bending portions.Type: GrantFiled: April 1, 2013Date of Patent: December 19, 2017Assignee: DELTA ELECTRONICS, INC.Inventors: Te-Wei Yuan, Hsueh-Kuo Liao, Yi-Kai Chou, Ming-Yuan Tsai, Wei-Hao Chi
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Patent number: 9653987Abstract: A method for detecting failure of soft start includes: connecting a variable frequency device to a load; detecting an energy storage unit at a first voltage level; generating an output current to the load; detecting the energy storage unit changed from the first voltage level into a second voltage level; generating a reference voltage value according to the output current and determining whether a voltage difference value between the first voltage level and the second voltage level is larger than the reference voltage value; determining whether a voltage peak-to-peak value of the energy storage unit is smaller than a set value by the controller if the voltage difference value is larger than the reference voltage value; and controlling the inverter circuit to stop outputting the output current to the load if the voltage peak-to-peak value is smaller than the set value.Type: GrantFiled: January 14, 2016Date of Patent: May 16, 2017Assignee: Delta Electronics, Inc.Inventors: Te-Wei Yuan, Yu-Ling Lee, Yi-Kai Chou, Bo-Jheng Lin
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Publication number: 20160359422Abstract: A method for detecting failure of soft start includes: connecting a variable frequency device to a load; detecting an energy storage unit at a first voltage level; generating an output current to the load; detecting the energy storage unit changed from the first voltage level into a second voltage level; generating a reference voltage value according to the output current and determining whether a voltage difference value between the first voltage level and the second voltage level is larger than the reference voltage value; determining whether a voltage peak-to-peak value of the energy storage unit is smaller than a set value by the controller if the voltage difference value is larger than the reference voltage value; and controlling the inverter circuit to stop outputting the output current to the load if the voltage peak-to-peak value is smaller than the set value.Type: ApplicationFiled: January 14, 2016Publication date: December 8, 2016Inventors: TE-WEI YUAN, YU-LING LEE, YI-KAI CHOU, BO-JHENG LIN
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Patent number: 8937826Abstract: A power converter apparatus for driving an electronic load is disclosed. The power converter apparatus includes a rectifier module, an active switch unit, a driving module, an input voltage detection module, an output voltage detection module, a current detection module and a digital processor module. The active switch unit is shunt connected to the electronic load. The input voltage detection module is used for sampling out an input sampled voltage waveform. The output voltage detection module is used for sampling out an output sampled voltage waveform. The current detection module is used for sampling out a practical input current waveform. The digital processor module generates a current reference command according to the input sampled voltage waveform and the output sampled voltage waveform. The digital processor module dynamically switches the active switch unit according to the current reference command and the practical input current waveform.Type: GrantFiled: October 31, 2012Date of Patent: January 20, 2015Assignee: Delta Electronics, Inc.Inventors: Te-Wei Yuan, Yi-Kai Chou, Chien-Yu Tseng, Yu-Jen Chen
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Publication number: 20140198454Abstract: An integrated power module packaging structure includes a plastic housing having a cavity; a plurality of step-shaped pins embedded in the plastic housing, a first printed circuit board disposed in the cavity, and a second printed circuit board disposed above the first printed circuit board in the cavity. Each of the step-shaped pins includes a first L-shaped bending portion and a second L-shaped bending portion connected to each other. The first printed circuit board is disposed with at least a power device and is electrically connected to at least a part of the first L-shaped bending portions. Two opposite surfaces of the second printed circuit board are respectively disposed with at least an electronic device, and the second printed circuit board is electrically connected to at least a part of the second L-shaped bending portions.Type: ApplicationFiled: April 1, 2013Publication date: July 17, 2014Applicant: DELTA ELECTRONICS, INC.Inventors: Te-Wei YUAN, Hsueh-Kuo LIAO, Yi-Kai CHOU, Ming-Yuan TSAI, Wei-Hao CHI
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Publication number: 20130300381Abstract: A power converter apparatus for driving an electronic load is disclosed. The power converter apparatus includes a rectifier module, an active switch unit, a driving module, an input voltage detection module, an output voltage detection module, a current detection module and a digital processor module. The active switch unit is shunt connected to the electronic load. The input voltage detection module is used for sampling out an input sampled voltage waveform. The output voltage detection module is used for sampling out an output sampled voltage waveform. The current detection module is used for sampling o out a practical input current waveform. The digital processor module generates a current reference command according to the input sampled voltage waveform and the output sampled voltage waveform. The digital processor module dynamically switches the active switch unit according to the current reference command and the practical input current waveform.Type: ApplicationFiled: October 31, 2012Publication date: November 14, 2013Applicant: DELTA ELECTRONICS, INC.Inventors: Te-Wei YUAN, Yi-Kai CHOU, Chien-Yu TSENG, Yu-Jen CHEN