公开(公告)号：US11038455B2

公开(公告)日：2021-06-15

申请号：US16600120

申请日：2019-10-11

申请人： ABB Schweiz AG

发明人： Rahul Kanchan

IPC分类号： H02P23/26

摘要： A method of performing scalar-based control of a motor connected to a power converter via at least one passive electrical reactance component, wherein the method includes: estimating a motor current at terminals of the motor to thereby obtain an estimated motor current, and controlling the power converter based on the estimated motor current.

公开(公告)号：US20210006128A1

公开(公告)日：2021-01-07

申请号：US16459265

申请日：2019-07-01

申请人： Nidec Motor Corporation

发明人： Richard L. Eason ,  Michael L. Largent ,  Steven R. Palmer ,  Jeffrey Scott Sherman ,  Richard A. Belley

IPC分类号： H02K9/06 ,  F04D29/70 ,  H02K5/15 ,  H02K7/08 ,  H02K9/22 ,  H02K11/33 ,  H02K21/16 ,  H02P23/26

摘要： An electric motor assembly includes a stator, a rotor, a motor housing, a rotatable shaft, a radial fan, and an air scoop. The motor housing at least partly houses the stator and rotor and presents an exterior motor surface. The rotatable shaft is associated with the rotor for rotational movement therewith, with the rotatable shaft extending along a rotational axis. The radial fan is mounted on the rotatable shaft exteriorly of the motor housing and is rotatable with the shaft to direct airflow in a radially outward direction. The air scoop extends radially outwardly relative to the radial fan and axially to receive radial airflow from the radial fan and turn the airflow axially to flow along the exterior motor surface. The air scoop includes spaced apart axially extending airflow vanes to guide the airflow as the airflow is turned axially.

公开(公告)号：US20200036283A1

公开(公告)日：2020-01-30

申请号：US16399522

申请日：2019-04-30

申请人： LG ELECTRONICS INC.

发明人： Seongmoo CHO ,  Kwangsoo KIM

IPC分类号： H02M1/42 ,  G05F1/70 ,  H02M5/458 ,  H02P23/26

摘要： A device for power factor correction can include a converter housing having an inner surface; a first converter substrate mounted on the inner surface of the converter housing; a second converter substrate mounted on another surface of first converter housing opposite to the inner surface; and a housing cover covering the first converter substrate and coupled to an upper surface of the converter housing, in which the second converter substrate includes a first surface having a first region including a source pad, and a second region including a drain pad spaced apart from the source pad, the source pad including a source pad extension portion extending into the second region; and a second surface including a heat dissipation pad for communicating heat from the source and drain pads to an outside of the device, in which the first region of the second converter substrate overlaps with the another surface of first converter housing, and the second region of the second converter substrate faces the housing cover without overlapping with the first converter substrate.

公开(公告)号：US20190296672A1

公开(公告)日：2019-09-26

申请号：US16440263

申请日：2019-06-13

申请人： DENSO CORPORATION

发明人： Masahiro SEGUCHI ,  Junichi NAKAZONO

IPC分类号： H02P23/26

摘要： A field winding type rotating electric machine, whose power factor is cos θ, includes a stator, a rotor with a field winding, a rectifying element, a drive unit and a control unit. When performing rectangular-wave or overmodulation energization, the control unit generates a voltage pulse pair, which induces a current pulse pair, by: setting a reference time to the center of an ON duration or OFF duration of a control signal of a first phase; and providing a temporary ON duration and a temporary OFF duration after a predetermined angle from the reference time. The predetermined angle is within a predetermined range including cos−1 θ in electrical angle. The temporary ON duration is provided to temporarily turn ON a control signal of a second phase during an OFF duration thereof. The temporary OFF duration is provided to temporarily turn OFF a control signal of a third phase during an ON duration thereof.

公开(公告)号：US20190288630A1

公开(公告)日：2019-09-19

申请号：US16433548

申请日：2019-06-06

申请人： Emerson Climate Technologies, Inc.

发明人： Joseph G. MARCINKIEWICZ ,  Charles E. GREEN

IPC分类号： H02P27/08 ,  F04B35/04 ,  H02P27/06 ,  H02M1/42 ,  F04B13/00 ,  F04B49/06 ,  H02P23/26 ,  F25B31/02 ,  F04B17/03 ,  H02M1/44 ,  F04C28/28 ,  F04C29/00 ,  F04B49/10 ,  F25B49/02 ,  F04B49/20

摘要： A drive includes an inverter power circuit that applies power to an electric motor of a compressor from a direct current (DC) voltage bus. A power factor correction (PFC) circuit outputs power to the DC voltage bus based on input alternating current (AC) power. The PFC circuit includes: (i) a switch having a first terminal, a second terminal, and a control terminal; (ii) a driver that switches the switch between open and closed states based on a control signal; (iii) an inductor that charges and discharges based on switching of the switch; and (iv) a circuit that outputs a signal indicating whether the switch is in the open state or the closed state based on a voltage across the first and second terminals of the switch.

公开(公告)号：US10411619B2

公开(公告)日：2019-09-10

申请号：US14838722

申请日：2015-08-28

申请人： REGAL BELOIT AMERICA, INC.

发明人： Ming Li ,  Roger Carlos Becerra ,  Ludovic Andre Chretien

IPC分类号： H02P27/06 ,  H02P5/74 ,  H02P23/26 ,  H02P29/50

摘要： An electric motor controller, an electric motor drive circuit, and methods for combined electric motor control are provided. The drive circuit is configured to drive a first electric motor and a second electric motor. The drive circuit includes a rectifier configured to convert an AC input voltage to a pulsed DC voltage, and a first DC link electrically coupled to the rectifier. The first DC-link includes a low-capacitance capacitor having a capacitance less than 10 μF. The drive circuit also includes a first inverter coupled to the first DC-link, the first inverter configured to generate a conditioned output voltage to drive the first electric motor, a second DC-link electrically coupled to the first DC-link, and a second inverter coupled to the second DC-link. The second inverter is configured to generate a conditioned output voltage to drive the second electric motor.

公开(公告)号：US10320322B2

公开(公告)日：2019-06-11

申请号：US15487101

申请日：2017-04-13

申请人： Emerson Climate Technologies, Inc.

发明人： Joseph G. Marcinkiewicz ,  Charles E. Green

IPC分类号： H02M1/34 ,  H02M1/42 ,  H02M1/44 ,  F04B13/00 ,  F04B17/03 ,  F04B35/04 ,  F04B49/06 ,  F04B49/10 ,  F04B49/20 ,  F04C28/28 ,  F04C29/00 ,  F25B31/02 ,  F25B49/02 ,  H02P23/26 ,  H02P27/06 ,  H02P27/08 ,  F04C18/02

摘要： A drive includes an inverter power circuit that applies power to an electric motor of a compressor from a direct current (DC) voltage bus. A power factor correction (PFC) circuit outputs power to the DC voltage bus based on input alternating current (AC) power. The PFC circuit includes: (i) a switch having a first terminal, a second terminal, and a control terminal; (ii) a driver that switches the switch between open and closed states based on a control signal; (iii) an inductor that charges and discharges based on switching of the switch; and (iv) a circuit that outputs a signal indicating whether the switch is in the open state or the closed state based on a voltage across the first and second terminals of the switch.

公开(公告)号：US20190028051A1

公开(公告)日：2019-01-24

申请号：US16069711

申请日：2016-12-23

申请人： Leybold GmbH

发明人： Sebastian Walzel

IPC分类号： H02P23/26 ,  H02P27/04 ,  F04D25/06 ,  F04D27/00

摘要： The invention relates to a vacuum pump drive including an electric motor driving the rotor of a vacuum pump, a first frequency converter connected to the electric motor and designed to generate a motor input voltage for driving the electric motor from a network supply voltage, at least one second frequency converter that is also designed to generate a motor input voltage of a variable frequency from a network supply voltage, in order to drive the motor according to the frequency of the motor input voltage, characterized in that the second frequency converter is provided with a measuring device, which is provided for measuring the motor input voltage generated by the first frequency converter and/or the related motor input current, in order to synchronize the second frequency converter with the first frequency converter.

公开(公告)号：US10020766B2

公开(公告)日：2018-07-10

申请号：US15351989

申请日：2016-11-15

申请人： Rockwell Automation Technologies, Inc.

发明人： Semyon Royak ,  Robert J. Breitzmann ,  Jingbo Liu ,  Thomas A. Nondahl ,  Jingya Dai ,  Peter B. Schmidt

IPC分类号： G05F1/70 ,  G05B13/02 ,  H02P23/26 ,  H02P23/14 ,  H02M1/42

CPC分类号： H02P23/26 ,  H02M1/126 ,  H02M1/4216 ,  H02M7/53871 ,  H02M7/5395 ,  H02M2001/0009 ,  H02P23/14

摘要： Disclosed examples include power conversion systems, methods and computer readable mediums to operate an inverter to drive a motor load through an output filter, in which a control output value is computed according to a current reference value and a current feedback value using a proportional-integral (PI) current regulator, the control output value is filtered using a lag compensator filter to compute an inverter output command value, and the inverter is controlled according to the inverter output command value.

公开(公告)号：US20180175767A1

公开(公告)日：2018-06-21

申请号：US15302599

申请日：2015-09-11

申请人： Guangdong Meizhi Compressor Co., Ltd.

发明人： Wanjie SONG ,  Xinjie REN ,  Siqing LIAO ,  Weimin XIANG ,  Yongjun FU

IPC分类号： H02P23/26 ,  H02P21/22 ,  H02P6/28 ,  H02K21/02 ,  H02K1/28 ,  H02P27/08

CPC分类号： H02P23/26 ,  H02K1/28 ,  H02K21/029 ,  H02P6/28 ,  H02P21/00 ,  H02P21/0089 ,  H02P21/22 ,  H02P27/08

摘要： The present disclosure provides a method and a device for controlling a power factor on motor side and a system having the same, and the method includes: controlling the motor using a control approach of Id′=0 so as to obtain quadrature-axis voltage Uq′ and direct-axis voltage Ud′ in a virtual coordinate system of a current control cycle; calculating a first control value according to Uq′ and Ud′; obtaining a power factor control target value, and calculating a target control value according to the power factor control target value; performing a PI control on a difference between the target control value and the first control value so as to obtain a coordinate deviation angle, and overlapping the coordinate deviation angle to a motor angle of the current control cycle so as to build a virtual coordinate system of a next control cycle, such that the power factor on the motor side is controllable.