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公开(公告)号：US20240072684A1
公开(公告)日：2024-02-29
申请号：US18341474
申请日：2023-06-26
申请人： Apple Inc.
CPC分类号： H02M7/4803 , H02M1/0041 , H02M1/12 , H02M7/529
摘要： An electronic device may include an inverter. The inverter may convert direct current (DC) power to alternating current (AC) power. The inverter may use a clock signal at a given frequency to output corresponding alternating current signals at the given frequency. The inverter may receive a dithered clock signal that is frequency dithered using a modulating signal. The dithered clock signal may have at least three different frequency levels during a repeated cycle of the modulating signal. The at least three different frequency levels may include a fundamental frequency, a first frequency that is lower than the fundamental frequency, and a second frequency that is higher than the fundamental frequency. The dithered clock signal may be, during the repeated cycle of the modulating signal, at the fundamental frequency for fewer total periods than at the first frequency and for fewer total periods than at the second frequency.
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公开(公告)号：US11736032B1
公开(公告)日：2023-08-22
申请号：US18164291
申请日：2023-02-03
申请人： Apple Inc.
CPC分类号： H02M7/4803 , H02M1/0041 , H02M1/12 , H02M7/529
摘要： An electronic device may include an inverter. The inverter may convert direct current (DC) power to alternating current (AC) power. The inverter may use a clock signal at a given frequency to output corresponding alternating current signals at the given frequency. The inverter may receive a dithered clock signal that is frequency dithered using a modulating signal. The dithered clock signal may have at least three different frequency levels during a repeated cycle of the modulating signal. The at least three different frequency levels may include a fundamental frequency, a first frequency that is lower than the fundamental frequency, and a second frequency that is higher than the fundamental frequency. The dithered clock signal may be, during the repeated cycle of the modulating signal, at the fundamental frequency for fewer total periods than at the first frequency and for fewer total periods than at the second frequency.
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公开(公告)号：US11677311B2
公开(公告)日：2023-06-13
申请号：US17763100
申请日：2020-08-18
IPC分类号： H02M7/5388 , H02M1/15 , H02P29/50 , H02M7/48 , H02M5/458 , H02M7/5387 , H02M7/5395
CPC分类号： H02M1/15 , H02M7/4803 , H02P29/50 , H02M5/458 , H02M7/4826 , H02M7/5387 , H02M7/5395
摘要： In a method for operating a controllable converter with an intermediate circuit capacitor, the control behavior can be improved by transmitting, depending on an intermediate circuit voltage applied to the intermediate circuit capacitor, an additional power component via the controllable converter such that the electric current that is generated by the controllable converter for the additional power component counteracts an oscillation of the intermediate circuit voltage. The additional power component is transmitted by the controllable converter to a connected motor as a pulsating additional torque. Also described is a controllable converter with a control unit for carrying out a method, wherein the controllable converter has semiconductors that can be switched off, and an intermediate circuit capacitor designed as a film-type capacitor.
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4.发明授权公开(公告)号：US12051983B2
公开(公告)日：2024-07-30
申请号：US17416599
申请日：2019-08-06
申请人： TMEIC Corporation
CPC分类号： H02M7/493 , H02J3/381 , H02M1/0003 , H02M1/126 , H02M7/4803 , H03H7/09 , H02J2300/28
摘要： A power conversion system including a plurality of power conversion devices connected in parallel. Each of the plurality of power conversion devices includes: a power conversion circuit configured to convert DC to AC; and an AC filter circuit connected to an output side of the power conversion circuit. The AC filter circuit is an LC low-pass filter including a first filter reactor and an AC filter capacitor connected in an L shape. The AC filter circuit further includes a second filter reactor connected in series to the AC filter capacitor, and a resistance constructing a series circuit together with the AC filter capacitor and the second filter reactor.
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公开(公告)号：US12009760B2
公开(公告)日：2024-06-11
申请号：US18341474
申请日：2023-06-26
申请人： Apple Inc.
CPC分类号： H02M7/4803 , H02M1/0041 , H02M1/12 , H02M7/529
摘要： An electronic device may include an inverter. The inverter may convert direct current (DC) power to alternating current (AC) power. The inverter may use a clock signal at a given frequency to output corresponding alternating current signals at the given frequency. The inverter may receive a dithered clock signal that is frequency dithered using a modulating signal. The dithered clock signal may have at least three different frequency levels during a repeated cycle of the modulating signal. The at least three different frequency levels may include a fundamental frequency, a first frequency that is lower than the fundamental frequency, and a second frequency that is higher than the fundamental frequency. The dithered clock signal may be, during the repeated cycle of the modulating signal, at the fundamental frequency for fewer total periods than at the first frequency and for fewer total periods than at the second frequency.
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公开(公告)号：US20230353063A1
公开(公告)日：2023-11-02
申请号：US18140896
申请日：2023-04-28
发明人： Bogdan Simionescu , George Popescu , Andrei Platon , Teodor Toma
IPC分类号： H02M1/14 , H02M7/5387 , H02M7/48
CPC分类号： H02M7/53873 , H02M1/143 , H02M7/4803
摘要： A multi-phase power converter with current matching is provided. The apparatus may include a control circuit to control a first phase of a power converter having a plurality of phases, and a phase matching circuit. The phase matching circuit may remove a DC component from an output ripple voltage of the converter, detect when respective ones of the plurality of phases begins generating its respective phase current and output a phase detector signal, extract a signal proportional to the first phase current and a signal proportional to either the remaining or total phase currents, output first and second voltages respectively proportional to the average of the first phase current and the remaining or total phase current, and output a corrective signal based on the difference between the first and second voltage. The control circuit may control the first phase based on the corrective signal.
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公开(公告)号：US20240305228A1
公开(公告)日：2024-09-12
申请号：US18437764
申请日：2024-02-09
发明人： Yuji IDE , Michio KITAHARA , Shunichi MIYAZAKI , Yoshiyuki USUI
CPC分类号： H02P21/0089 , H02M7/4803 , H02P21/30 , H02P27/08
摘要： A motor control apparatus includes: a smoothing capacitor; an inverter circuit; a torque limiter; and a field-weakening control device. The smoothing capacitor smooths the direct current power. The inverter circuit converts the smoothed direct current power to alternating current power. The torque limiter limits motor torque based on a torque limit value calculated from a direct current voltage applied to the smoothing capacitor, limiting the motor torque in a power running direction to a first torque value when the direct current voltage drops to a first threshold. The field-weakening control device weakens a field and raises an induced motor voltage and the direct current voltage when the power running direction motor torque is limited to the first value. The torque limiter limits the power running direction motor torque to a second value greater than the first value when the direct current voltage rises from the first to a second threshold.
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公开(公告)号：US20230387827A1
公开(公告)日：2023-11-30
申请号：US18306569
申请日：2023-04-25
发明人： Kazuhiro FUJIOKA , Yoshiaki Ishiguro , Ryota Kondo
IPC分类号： H02M7/5395 , H02M7/48 , H02M1/00
CPC分类号： H02M7/5395 , H02M7/4803 , H02M1/0025 , H02M1/0019
摘要： A setting unit sets a duty ratio of a PWM signal based on a target voltage value, and outputs the duty ratio to a voltage conversion circuit. An estimated value calculation unit cyclically calculates an estimated duty ratio value based on the detected input voltage value and the detected output voltage value. An abnormality detection unit cyclically calculates, as a difference value, a difference between an updated estimated value and a comparison reference value, and detects abnormality of a voltage detection unit based on a change in calculated difference value. The updated estimated value is a newly calculated estimated duty ratio value. The comparison reference value is a value based on the estimated duty ratio value calculated in a cycle prior to a cycle in which the updated estimated value is calculated.
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公开(公告)号：US20230223863A1
公开(公告)日：2023-07-13
申请号：US18180349
申请日：2023-03-08
申请人： Denso Corporation
发明人： Yuuki Ogawa , Takuya Okubo
CPC分类号： H02M7/4803 , H02M7/53803 , H02M1/084
摘要： A power control apparatus, comprising: a first wiring and a second wiring connected to a power source; a first capacitor connected to the first wiring and the second wiring; an electrical component including a plurality of switches connected in parallel with the first capacitor through the first wiring and the second wiring; and a second capacitor which is connected to one of the first wiring and the second wiring and is connected to a reference potential portion having a constant potential, wherein an impedance of a first conducting path between another side connection point, which is connected to the first capacitor, of the other one of the first wiring and the second wiring and the power supply not through the first capacitor, is higher than an impedance of a second conducting path between the another side connection point and the second capacitor through the first capacitor.
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