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公开(公告)号：US11611300B2
公开(公告)日：2023-03-21
申请号：US17443795
申请日：2021-07-27
Applicant: Delta Electronics, Inc.
Inventor： Shao-Kai Tseng , Yi-Jan Chang , Sheng-Han Wu
Abstract: A current sensing correction method for a driving system is provided. Firstly, the detection values of a three-phase current are acquired through the measuring unit. When the three-phase current is maintained at the DC state, the DC values of the three-phase current are acquired and recorded as three-phase demagnetization values. When the detection values are zero, a d-axis current and a q-axis current are calculated according to the three-phase demagnetization values, a d-axis correction current command and a q-axis correction current command are calculated according to a proportional constant, the d-axis current and the q-axis current, and a three-phase demagnetization current is generated to the measuring unit according to the d-axis correction current command and the q-axis correction current command. When the demagnetization time reaches the first predetermined time, the three-phase demagnetization current is not generated.
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Patent Agency Ranking
公开(公告)号：US11133770B2
公开(公告)日：2021-09-28
申请号：US16900326
申请日：2020-06-12
Applicant: Delta Electronics, Inc.
Inventor： Yi-Jan Chang , Yi-Kai Chou , Po-Sung Chiang , Chien-Hao Chen
IPC: H02P29/024
Abstract: 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.
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公开(公告)号：US20190097456A1
公开(公告)日：2019-03-28
申请号：US16054039
申请日：2018-08-03
Applicant: DELTA ELECTRONICS, INC.
Inventor： Te-Wei Yuan , Yi-Jan Chang
Abstract: An uninterruptible power operating apparatus includes an energy storage element, a charging circuit, a DC/DC converting circuit, a first DC/AC converting circuit, a driving circuit and a switching element. The DC/DC converting circuit is electrically connected with the energy storage element to convert its first DC energy to a second DC energy. The first DC/AC converting circuit is electrically connected with the DC/DC converting circuit. The driving circuit is electrically connected between an AC power source and a load. The switching element is electrically connected between the DC/DC converting circuit and the driving circuit. When the AC power source outputs power normally, the switching element is turned off, and the driving circuit receives energy from AC power source. When the power outputted from the AC power source is interrupted or abnormal, the switching element is turned on, and the driving circuit receives the second DC energy through the switching element.
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公开(公告)号：US20220166355A1
公开(公告)日：2022-05-26
申请号：US17443795
申请日：2021-07-27
Applicant: Delta Electronics, Inc.
Inventor： Shao-Kai Tseng , Yi-Jan Chang , Sheng-Han Wu
Abstract: A current sensing correction method for a driving system is provided. Firstly, the detection values of a three-phase current are acquired through the measuring unit. When the three-phase current is maintained at the DC state, the DC values of the three-phase current are acquired and recorded as three-phase demagnetization values. When the detection values are zero, a d-axis current and a q-axis current are calculated according to the three-phase demagnetization values, a d-axis correction current command and a q-axis correction current command are calculated according to a proportional constant, the d-axis current and the q-axis current, and a three-phase demagnetization current is generated to the measuring unit according to the d-axis correction current command and the q-axis correction current command. When the demagnetization time reaches the first predetermined time, the three-phase demagnetization current is not generated.
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公开(公告)号：US10794938B2
公开(公告)日：2020-10-06
申请号：US16056503
申请日：2018-08-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Yi-Kai Chou , Yi-Jan Chang
Abstract: 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.
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公开(公告)号：US10714973B2
公开(公告)日：2020-07-14
申请号：US16054039
申请日：2018-08-03
Applicant: DELTA ELECTRONICS, INC.
Inventor： Te-Wei Yuan , Yi-Jan Chang
Abstract: An uninterruptible power operating apparatus includes an energy storage element, a charging circuit, a DC/DC converting circuit, a first DC/AC converting circuit, a driving circuit and a switching element. The DC/DC converting circuit is electrically connected with the energy storage element to convert its first DC energy to a second DC energy. The first DC/AC converting circuit is electrically connected with the DC/DC converting circuit. The driving circuit is electrically connected between an AC power source and a load. The switching element is electrically connected between the DC/DC converting circuit and the driving circuit. When the AC power source outputs power normally, the switching element is turned off, and the driving circuit receives energy from AC power source. When the power outputted from the AC power source is interrupted or abnormal, the switching element is turned on, and the driving circuit receives the second DC energy through the switching element.
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