Patents by Inventor Xiaoyu Sui
Xiaoyu Sui 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: 11139754Abstract: An inverter circuit for realizing high-efficiency control of single-phase power of a single-phase three-wire power supply includes a bridge inverter circuit connected to an output end of a DC power supply, a freewheeling circuit connected to an output end of the bridge inverter circuit for providing freewheeling during switching of the bridge inverter circuit, and a control unit connected with the bridge inverter circuit and the freewheeling circuit. When the switching units in the high-frequency operating state are switched to an off state, the freewheeling circuit is controlled to operate continuously to output power to the U-phase line or the W-phase line, so that the switching units only participate in high-frequency operations in nearly half of the whole mains cycle, thereby switching loss and conduction loss of the switching units Q1 to Q6 can be reduced by nearly half, and the efficiency of the whole inverter circuit is greatly improved.Type: GrantFiled: June 4, 2021Date of Patent: October 5, 2021Assignee: Solax Power Network Technology (Zhejiang) Co., LTD.Inventors: Xinmiao Shi, Huawei Guo, Xiaoyu Sui, Liangliang Cheng, Chaohou Liu, Weixu Chen
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Publication number: 20200256826Abstract: Systems and methods for detecting ions in samples. In one embodiment, the system includes a field-effect transistor sensor and an electronic controller. The field-effect transistor sensor is in contact with the sample and includes a first electrode and a second electrode. The electronic controller is coupled to the field-effect transistor sensor. The electronic controller is configured to apply a pulse wave excitation signal to the first electrode. The electronic controller is also configured to receive a response signal from the second electrode. The electronic controller is further configured to determine an electrical characteristic of the field-effect transistor sensor based on the response signal. The electronic controller is also configured to determine an amount of the ions in the sample based on the electrical characteristic of the field-effect transistor sensor.Type: ApplicationFiled: October 26, 2018Publication date: August 13, 2020Inventors: Junhong Chen, Arnab Maity, Xiaoyu Sui
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Patent number: 9280993Abstract: A method, apparatus, and system for implementing enhanced asymmetric degauss control for a write head for hard disk drives. A degauss period is provided at the end of a write. The write head is driven asymmetrically with respect to the positive and negative driving currents during the degauss period. The average value of the write current during the degauss period is non-zero.Type: GrantFiled: December 12, 2013Date of Patent: March 8, 2016Assignee: HGST Netherlands B.V.Inventors: John Contreras, Zhen Jin, Yuanpeng Li, Xiaoyu Sui
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Publication number: 20150170687Abstract: A method, apparatus, and system for implementing enhanced asymmetric degauss control for a write head for hard disk drives. A degauss period is provided at the end of a write. The write head is driven asymmetrically with respect to the positive and negative driving currents during the degauss period. The average value of the write current during the degauss period is non-zero.Type: ApplicationFiled: December 12, 2013Publication date: June 18, 2015Applicant: HGST Netherlands B.V.Inventors: John Contreras, Zhen Jin, Yuanpeng Li, Xiaoyu Sui
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Patent number: 8331058Abstract: A method and apparatus for providing a write head with an improved pole tip to improve overwrite and/or adjacent track interference. A cross pole tip writer is provided with a shape that is designed to reduce the saturation on the pole tip and aid in the concentration of flux to the down track.Type: GrantFiled: May 28, 2004Date of Patent: December 11, 2012Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Savas Gider, Wen-Chien David Hsiao, Quan-chiu Harry Lam, Terence Tin-Lok Lam, Edward Hin Pong Lee, Yansheng Luo, Vladimir Nikitin, Changqing Shi, Xiaoyu Sui
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Patent number: 8164987Abstract: A magnetic write head arranged to maximize efficiency of an optical device used to locally heat a magnetic medium during use, also to maximize efficiency of a heater element for thermal fly height control. The magnetic head is constructed with a read head, a write head and a slider body. The write head is located between the read head and the slider body. A heater element can be located between the read head and the write head and an optical device such as an optical waveguide can be located between the write head and the slider body. The write head can be constructed to have a write pole that is closer to the slider body than the return pole is, thereby allowing the write pole to be adjacent to the optical device.Type: GrantFiled: October 29, 2008Date of Patent: April 24, 2012Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hardayal Singh Gill, Gurinder Pal Singh, Xiaoyu Sui
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Publication number: 20100103783Abstract: A magnetic write head arranged to maximize efficiency of an optical device used to locally heat a magnetic medium during use, also to maximize efficiency of a heater element for thermal fly height control. The magnetic head is constructed with a read head, a write head and a slider body. The write head is located between the read head and the slider body. A heater element can be located between the read head and the write head and an optical device such as an optical waveguide can be located between the write head and the slider body. The write head can be constructed to have a write pole that is closer to the slider body than the return pole is, thereby allowing the write pole to be adjacent to the optical device.Type: ApplicationFiled: October 29, 2008Publication date: April 29, 2010Inventors: Hardayal Singh Gill, Gurinder Pal Singh, Xiaoyu Sui
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Patent number: 7508628Abstract: A magnetic structure for use in a magnetic recording head, the structure having improved resistance to stray field writing. The magnetic structure can be for example a magnetic shield or a return pole of a perpendicular write element. The structure includes a main body portion which may have a generally rectangular configuration, and first and second wing portions extending laterally from the sides of the body at or near the ABS. The wing portions have a depth measured perpendicular to the ABS that is significantly less than the depth of the body portion (preferably less than 25 percent of the body portion). The wing portions may also have notches formed in their ABS edges. The wings conduct flux from the ABS edge of the body portion and create a flux choking effect for magnetic flux flowing into the wings.Type: GrantFiled: October 29, 2004Date of Patent: March 24, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Xiaodong Che, Hardayal Singh Gill, Wen-chien Hsiao, Yangsheng Luo, Xiaoyu Sui
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Publication number: 20080158705Abstract: A write head tester is disclosed. The write head tester includes a rotatably coupled magnetic media having a stand-off thereover. In addition, a write head holder is fixedly coupled with the tester. The write head holder receives and electrically couples a removably coupleable write head such that the removably coupleable write head is capable of performing a write on the magnetic media. A read head is also fixedly coupled with the tester. The read head is utilized for performing a read on the magnetic media. Furthermore, an evaluator is provided for accessing a result of the read on the magnetic media and evaluating the removably coupleable write head based on the read.Type: ApplicationFiled: December 28, 2006Publication date: July 3, 2008Inventors: Xiaodong Che, Wen-chien Hsiao, Yansheng Luo, Xiaoyu Sui
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Patent number: 7365531Abstract: An apparatus for reader characterization is described. The apparatus includes a rotator for rotating a media. The media can contain a signal having a value for a function of a read/write head being assessed. The rotator is operable in conjunction with said apparatus. The apparatus also includes a proximator for proximalizing the media to the read/write head. The proximator is operable in conjunction with said apparatus. The apparatus further includes a writer operable in conjunction with said assembly. The writer writes the signal upon the media. The signal emits the value of the function. The signal is detectable by a reader of the read/write head. The apparatus additionally includes an interface operable in the apparatus for providing removable orientation of the read/write head in an assessing position. The assessing position enables a reader of the read/write head to detect the signal upon rotation of the signal through the assessing position.Type: GrantFiled: December 3, 2004Date of Patent: April 29, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Xiaodong Che, Wenchien David Hsiao, Yansheng Luo, Xiaoyu Sui
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Patent number: 7227711Abstract: A hard disk drive (HDD) detects and measures external stray magnetic fields with existing HDD components. After detecting a strong external magnetic field, read and write operations of the HDD are suspended, and/or other proper corrective actions are taken to minimize loss of data. To measure the stray magnetic field, the magnetic head reader is used as a field sensor. The resistance of the reader changes in the presence of the field, such as with the preamp in the HDD. The resistance also changes with temperature. If the temperature inside the HDD is measured, the resistance change due to temperature is normalized. Even without being able to measure the HDD temperature, the stray magnetic field can be measured with a top head and a bottom head in the HDD. The temperature sensitivity of the reader is thereby cancelled out.Type: GrantFiled: October 29, 2004Date of Patent: June 5, 2007Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Xiaodong Che, Wen-Chien David Hsiao, Yansheng Luo, Xiaoyu Sui
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Patent number: 7196881Abstract: A magnetoresistive sensor having adaptive biasing of its free layer through use of an electromagnetic biasing system incorporated into a magnetic head.Type: GrantFiled: March 8, 2004Date of Patent: March 27, 2007Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Changqing Shi, Xiaoyu Sui
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Patent number: 7133241Abstract: A method and apparatus for optimizing data record quality on a disk for a pair of read and write heads, in which the write head is bigger, by adaptively varying linear and track density of overlapping recorded tracks to achieve a target storage capacity. In the method, target storage capacity and radial writing direction are selected. Read and write widths of heads are determined. A linear density and offset distance pairing for optimizing record quality at target storage capacity is determined, wherein offset distance is less than write width but greater than read width. The write head writes a track at the linear density, is offset in the radial direction by the offset distance, and the offset distance is stored. The write head writes a new track at the linear density. Offsetting, storing offset, and writing a new track are repeated until desired data is written into a cluster.Type: GrantFiled: April 11, 2005Date of Patent: November 7, 2006Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Xiaodong Che, Wen-Chien David Hsiao, Yansheng Luo, Xiaoyu Sui, Samuel Wei-san Yuan
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Publication number: 20060227449Abstract: A method and apparatus for optimizing data record quality on a disk for a pair of read and write heads, in which the write head is bigger, by adaptively varying linear and track density of overlapping recorded tracks to achieve a target storage capacity. In the method, target storage capacity and radial writing direction are selected. Read and write widths of heads are determined. A linear density and offset distance pairing for optimizing record quality at target storage capacity is determined, wherein offset distance is less than write width but greater than read width. The write head writes a track at the linear density, is offset in the radial direction by the offset distance, and the offset distance is stored. The write head writes a new track at the linear density. Offsetting, storing offset, and writing a new track are repeated until desired data is written into a cluster.Type: ApplicationFiled: April 11, 2005Publication date: October 12, 2006Inventors: Xiaodong Che, Wen-Chien Hsiao, Yansheng Luo, Xiaoyu Sui, Samuel Yuan
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Patent number: 7119537Abstract: A method for measuring a magnetic read width MRW of a magnetic read sensor directly from the derivative of a full track profile, with better accuracy and more advantages than the micro-track method was invented and also there is no need to use a separate wide write head. The magnetic write width MWW of the write head, without the influence of sensor side reading, can also be obtained by this method along with the MRW with no additional calculations.Type: GrantFiled: September 30, 2004Date of Patent: October 10, 2006Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Xiaodong Che, Terence Tin-Lok Lam, Zhong-heng Lin, Xiaoyu Sui
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Publication number: 20060119354Abstract: An apparatus for reader characterization is described. The apparatus includes a rotator for rotating a media. The media can contain a signal having a value for a function of a read/write head being assessed. The rotator is operable in conjunction with said apparatus. The apparatus also includes a proximator for proximalizing the media to the read/write head. The proximator is operable in conjunction with said apparatus. The apparatus further includes a writer operable in conjunction with said assembly. The writer writes the signal upon the media. The signal emits the value of the function. The signal is detectable by a reader of the read/write head. The apparatus additionally includes an interface operable in the apparatus for providing removable orientation of the read/write head in an assessing position. The assessing position enables a reader of the read/write head to detect the signal upon rotation of the signal through the assessing position.Type: ApplicationFiled: December 3, 2004Publication date: June 8, 2006Inventors: Xiaodong Che, Wenchien Hsiao, Yansheng Luo, Xiaoyu Sui
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Publication number: 20060092543Abstract: A hard disk drive (HDD) detects and measures external stray magnetic fields with existing HDD components. After detecting a strong external magnetic field, read and write operations of the HDD are suspended, and/or other proper corrective actions are taken to minimize loss of data. To measure the stray magnetic field, the magnetic head reader is used as a field sensor. The resistance of the reader changes in the presence of the field, such as with the preamp in the HDD. The resistance also changes with temperature. If the temperature inside the HDD is measured, the resistance change due to temperature is normalized. Even without being able to measure the HDD temperature, the stray magnetic field can be measured with a top head and a bottom head in the HDD. The temperature sensitivity of the reader is thereby cancelled out.Type: ApplicationFiled: October 29, 2004Publication date: May 4, 2006Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Xiaodong Che, Wen-Chien Hsiao, Yansheng Luo, Xiaoyu Sui
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Publication number: 20060092569Abstract: A magnetic structure for use in a magnetic recording head, the structure having improved resistance to stray field writing. The magnetic structure can be for example a magnetic shield or a return pole of a perpendicular write element. The structure includes a main body portion which may have a generally rectangular configuration, and first and second wing portions extending laterally from the sides of the body at or near the ABS. The wing portions have a depth measured perpendicular to the ABS that is significantly less than the depth of the body portion (preferably less than 25 percent of the body portion). The wing portions may also have notches formed in their ABS edges. The wings conduct flux from the ABS edge of the body portion and create a flux choking effect for magnetic flux flowing into the wings.Type: ApplicationFiled: October 29, 2004Publication date: May 4, 2006Inventors: Xiaodong Che, Hardayal Gill, Wen-chien Hsiao, Yangsheng Luo, Xiaoyu Sui
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Publication number: 20060066300Abstract: A method for measuring a magnetic read width MRW of a magnetic read sensor directly from the derivative of a full track profile, with better accuracy and more advantages than the micro-track method was invented and also there is no need to use a separate wide write head. The magnetic write width MWW of the write head, without the influence of sensor side reading, can also be obtained by this method along with the MRW with no additional calculations.Type: ApplicationFiled: September 30, 2004Publication date: March 30, 2006Inventors: Xiaodong Che, Terence Lam, Zhong-heng Lin, Xiaoyu Sui
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Publication number: 20050264930Abstract: A method and apparatus for providing a write head with an improved pole tip to improve overwrite and/or adjacent track interference. A cross pole tip writer is provided with a shape that is designed to reduce the saturation on the pole tip and aid in the concentration of flux to the down track.Type: ApplicationFiled: May 28, 2004Publication date: December 1, 2005Inventors: Savas Gider, Wen-Chien Hsiao, Quan-chiu Lam, Terence Lam, Edward Hin Lee, Yansheng Luo, Vladimir Nikitin, Changqing Shi, Xiaoyu Sui