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公开(公告)号：EP3499702A1
公开(公告)日：2019-06-19
申请号：EP18211910.7
申请日：2018-12-12
发明人： FERNANDEZ-MATTOS, Rodrigo , LAKSHMI, Priya Kakarla Naga , RAO, Sesh Mohan , KATAKAM, Sridhar , VALLERU, Somasekhar , AGRAWAL, Shobhit
摘要： Aspects include a hold-up capacitor charging circuit for a power supply. The hold-up capacitor charging circuit (10) includes a voltage boosting charge pump circuit (20) with a hold-up capacitor (24) electrically coupled to a voltage source (26). The hold-up capacitor charging circuit also includes a fly-back circuit (40). The fly-back circuit includes a transformer (42) with a primary winding electrically coupled to the voltage source and a secondary winding electrically coupled to a load. A switch (44) is electrically coupled to the primary winding and the voltage boosting charge pump circuit. A controller (48) is operable to open and close the switch to control energy transfer from the primary winding to the secondary winding and charge the hold-up capacitor responsive to voltages of the voltage source, the voltage boosting charge pump circuit, and a reflected voltage of the secondary winding at the primary winding.
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公开(公告)号：EP4303897A1
公开(公告)日：2024-01-10
申请号：EP22275090.3
申请日：2022-07-07
IPC分类号： H01F27/245 , H01F27/26
摘要： A magnetic core section of a transformer or an inductor, comprising a substantially rectangular core section body having opposing sides (20a, 20b) joined by opposing ends (20c, 20d), and further comprising interlocking features (30a, 30b) provided at each of the ends, shaped to interlock with interlocking features of complementary core sections (12a, 12b).
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公开(公告)号：EP4329185A1
公开(公告)日：2024-02-28
申请号：EP23190249.5
申请日：2023-08-08
IPC分类号： H02P5/74
摘要： A proportional integrator for control of a motor drive arranged to be connected in parallel with one or more other motor drives to drive a common load, the proportional integrator comprising means to receive an input command signal and to compare with a local measured signal from the motor drive and to output a local control signal for that motor drive, further comprising a global input signal indicative of the behaviour of the one or more other motor drives, the global input signal being incorporated into the proportional integral function with the input command signal and the local measured signal to provide the local control signal.
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公开(公告)号：EP4148968A1
公开(公告)日：2023-03-15
申请号：EP21196711.2
申请日：2021-09-14
摘要： A zero-sequence blocking transformer comprising a first core part, a first pair of windings wound around the first core part, a second core part and a second pair of windings wound around the second core part, the first core and the second core having a geometry to generate a leakage inductance.
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公开(公告)号：EP4152615A1
公开(公告)日：2023-03-22
申请号：EP21196998.5
申请日：2021-09-15
IPC分类号： H03K17/687 , H02M7/538 , H02M7/5388 , H02M1/08
摘要： A bootstrap gate driver charging circuit arranged to drive the gate of an upper switch (Q U ) and a lower switch (Q L ) connected in series to provide an AC output voltage (400) voltage by alternatively turning on and off according to a predetermined duty cycle of alternate upper switch turn-on and lower switch turn-on phases, the bootstrap gate driver charging circuit comprising: an input terminal; an output terminal; an H-bridge inverter with an inverter input and an inverter output; a charging path; and a bootstrap capacitor (70); wherein the input inverter is electrically connected to the input terminal, the inverter output is electrically connected to a first end of the bootstrap capacitor, the charging path is electrically connected between a second end of the bootstrap capacitor and a gate driver supply voltage; wherein in response to the lower switch being turned ON and providing a path to ground with respect to the gate driver's supply voltage and in response to the lower switch being turned off, the charging circuit provides a sufficient voltage level to maintain the upper switch ON for the duration of the upper switch turn-on phase by toggling the upper and lower switches for a short period of time during the upper switch turn-on phase, so as to maintain the charge of the bootstrap capacitor during that phase.
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6.发明公开
公开(公告)号：EP3893379A1
公开(公告)日：2021-10-13
申请号：EP21153577.8
申请日：2021-01-26
摘要： An auto-transformer rectifier system comprising an 18-pulse (or multiple of 18-pulse) autotransformer rectifier unit ATRU having three, or a multiple of three, diode bridge rectifiers (5a, 5b, 5c) and a balancing resistor (40) to balance the power flow through the diode bridge rectifiers, wherein the balancing resistor has a variable resistance, and further comprising a controller (80) configured to identify imbalances between power flows of the respective diode bridge rectifiers and to adjust the resistance of the balancing resistor in response to the detected imbalance.
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公开(公告)号：EP4210209A1
公开(公告)日：2023-07-12
申请号：EP22275003.6
申请日：2022-01-10
摘要： An electrical power converter (1, 1', 1") includes a DC link capacitor (3, 3', 3") configured for connection to a DC power source to provide an input load, at least one pair of semiconductor switches (2a, 2b, 2c, 2a', 2b', 2a", 2b") connected in parallel with the DC link capacitor (3, 3', 3") and positioned on either side of an output load terminal (10a, 10b, 10c, 10a', 10b', 10a", 10b"). The electrical power converter (1, 1', 1") further includes an inductive current sensor (12, 12', 12"), arranged to sense a primary current from a terminal of the DC link capacitor (3, 3', 3"), and a detection circuit (14), connected to the inductive current sensor (12, 12', 12") and arranged to monitor for an over-current condition, and to produce an output which causes at least one of the pair of semiconductor switches (2a, 2b, 2c, 2a', 2b', 2a", 2b") to be switched to a non-conducting state when an over-current condition is detected.
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公开(公告)号：EP4106166A1
公开(公告)日：2022-12-21
申请号：EP21275081.4
申请日：2021-06-14
摘要： A power factor correction circuit comprising: a global voltage input; and means for deriving a reference current from the global voltage; whereby the means for deriving the reference current comprises a leading phase admittance cancellation, LPAC, transfer function and a filter, whereby the reference current is derived from a sum of an output of the LPAC transfer function and an output of the filter.
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公开(公告)号：EP4106165A1
公开(公告)日：2022-12-21
申请号：EP21275080.6
申请日：2021-06-14
摘要： A power factor correction circuit comprising: a global voltage input; and means for deriving a reference current from the global voltage; whereby the means for deriving the reference current comprises a digital leading phase admittance cancellation, DLPAC, transfer function and a filter, whereby the reference current is derived from a sum of an output of the DLPAC transfer function and an output of the filter, and further comprising means for compensating for delays in the DLPAC function.
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