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公开(公告)号：US09755546B2
公开(公告)日：2017-09-05
申请号：US14646465
申请日：2012-11-21
Applicant: OTIS ELEVATOR COMPANY
Inventor： Luis Arnedo , Marinko Kovacic , Yang Wang , Shashank Krishnamurthy
Abstract: A neutral point clamped, multilevel level converter includes a DC voltage link; a first capacitor coupling one side of the DC link to a neutral point; a second capacitor coupling another side of the DC link to the neutral point; a plurality of phase legs, each phase leg including switches, each phase leg coupled to an AC node; a current sensor associated with each AC node; and a controller generating a PWM signal to control the switches, the controller generating a current zero sequence component in response to current sensed at each of the current sensors, the controller adjusting a modulation index signal in response to the current zero sequence component to produce the PWM signal.
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公开(公告)号：US20160362276A1
公开(公告)日：2016-12-15
申请号：US15178608
申请日：2016-06-10
Applicant: OTIS ELEVATOR COMPANY
Inventor： Yang Wang , Shashank Krishnamurthy , HanJong Kim , Ismail Agirman
Abstract: A method of stopping an elevator in the event of a power failure is provided. The method includes determining that a power source for a drive system of an elevator has failed, retaining energy electrically separate from the power source, managing the retained energy to enable drive-assisted emergency stopping of an elevator, and stopping an elevator using the managed, retained energy.
Abstract translation: 提供了在停电的情况下停止电梯的方法。 该方法包括确定用于电梯的驱动系统的电源已经发生故障，保持能量与电源电气分离，管理保留的能量以使电梯的驱动辅助紧急停止，以及使用被管理的电梯停止电梯， 保留能量。
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公开(公告)号：US20160079904A1
公开(公告)日：2016-03-17
申请号：US14785023
申请日：2013-04-17
Applicant: OTIS ELEVATOR COMPANY
Inventor： Shashank Krishnamurthy , Xin Wu , William A. Veronesi , Kyle W. Rogers , Daryl J. Marvin
IPC: H02P27/06 , B66B1/46 , B66B11/04 , H03K17/081 , H03K17/16
CPC classification number: H02P27/06 , B66B1/46 , B66B11/04 , H02M1/08 , H03K17/08104 , H03K17/08116 , H03K17/08142 , H03K17/122 , H03K17/162 , H03K17/163 , H03K17/164 , H03K17/168 , Y02B70/1483
Abstract: A switching assembly for use in a drive unit for driving a motor. The switching assembly includes a gallium nitride switch having a gate terminal, drain terminal and source terminal; a gate driver generating a drive signal; a gate drive circuit including a turn on resistor in series with the gate driver and the gate terminal and a clamping circuit connected across the gate terminal and the source terminal, a turn on drive signal from the gate driver being applied to the gate terminal through the turn on resistor; and a snubber circuit connected across the drain terminal and source terminal.
Abstract translation: 一种用于驱动电动机的驱动单元的开关组件。 开关组件包括具有栅极端子，漏极端子和源极端子的氮化镓开关; 产生驱动信号的栅极驱动器; 栅极驱动电路，其包括与栅极驱动器和栅极端子串联的导通电阻器和连接在栅极端子和源极端子之间的钳位电路，来自栅极驱动器的导通驱动信号通过该栅极驱动器施加到栅极端子 打开电阻; 以及连接在漏极端子和源极端子之间的缓冲电路。
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公开(公告)号：US10689226B2
公开(公告)日：2020-06-23
申请号：US15546048
申请日：2016-02-03
Applicant: Otis Elevator Company
Inventor： Peter DePaola, Jr. , Richard N. Fargo , David Ginsberg , Dang V. Nguyen , Shashank Krishnamurthy
Abstract: An elevator car travels in a lane (113, 115, 117) of an elevator shaft (111). A linear propulsion system imparts force to the car (214). The system includes a first part (116) mounted in the lane of the shaft and a second part (118) mounted to the elevator car configured to co-act with the first part to impart movement to the car. Car state sensors (360a-c) are disposed in the lane and determine a state space vector of the car within the lane. A sensed element (364) on the car is sensed by the plurality of car state sensors when the car is in proximity to the respective car state sensor. A control system (225) applies an electrical current to at least one of the first part and the second part and the plurality of car state sensors communicate with the control system and the linear propulsion system to provide state space vector data.
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公开(公告)号：US10366935B2
公开(公告)日：2019-07-30
申请号：US14782377
申请日：2013-04-09
Applicant: OTIS ELEVATOR COMPANY
Inventor： Shashank Krishnamurthy , Xin Wu , William A. Veronesi , Kyle W. Rogers , Daryl J. Marvin
IPC: H01L23/495 , H01L23/552 , H05K1/16 , H01L23/367 , H02M7/00 , H01L25/07 , H01L29/20 , H02K9/22 , H05K1/02 , H05K1/11 , H05K1/18 , H03K17/0412 , H02K11/33
Abstract: A drive unit for a motor includes a printed circuit board (PCB); a first gallium nitride switch having a gate, the first gallium nitride switch mounted to the PCB; a second gallium nitride switch having a gate, the second gallium nitride switch mounted to the PCB; a gate driver generating a turn-off drive signal to turn off the first gallium nitride switch and turn off the second gallium nitride switch; a first turn-off trace on the PCB, the first turn-off trace directing the turn-off drive signal to the gate of the first gallium nitride switch; and a second turn-off trace on the PCB, the second turn-off trace directing the turn-off drive signal to the gate of the second gallium nitride switch; wherein an impedance of the first turn-off trace is substantially equal to an impedance of the second turn-off trace.
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Patent Agency Ranking
公开(公告)号：US20180334356A1
公开(公告)日：2018-11-22
申请号：US15542153
申请日：2016-01-19
Applicant: Otis Elevator Company
Inventor： Shashank Krishnamurthy , Daryl J. Marvin , Luis Arnedo
IPC: B66B1/24
Abstract: An elevator power distribution system includes an elevator car (114; 214; 314; 414; 514) configured to travel in a lane (113, 115, 117; 213; 313, 315, 317; 413, 415, 417; 513, 515, 517) of an elevator shaft (111) and a linear propulsion system configured to impart force to the elevator car. The linear propulsion system includes a first portion (216), mounted in the lane and a second portion (218) mounted to the elevator car configured to coact with the first portion (216) to impart movement to the elevator car. A plurality of electrical buses (371, 372, 373, 374; 471, 472, 473, 474; 571, 572, 573, 574) are disposed within the lane and configured to provide power to the first portion, a rectifier (361a, 362a, 363a, 364a, 361b, 362b, 363b, 364b, 361c, 362c, 363c, 364c; 461a, 462a, 463a, 464a, 461b, 462b, 463b, 464b, 461c, 462c, 463c, 464c; 561a, 562a, 563a, 564a, 561b, 562b, 563b, 564b, 561c, 562c, 563c, 564c) is electrically connected to each of the plurality of buses and configured to convert power provided between the respective bus and a grid (302; 402; 502), and a battery backup (381a, 382a, 383a, 384a, 381b, 382b, 383b, 384b, 381c, 382c, 383c, 384c; 481a, 482a, 483a, 484a, 481b, 482b, 483b, 484b, 481c, 482c, 483c, 484c; 585a, 585b, 585c) is electrically connected with the rectifier and configured to transfer power to or receive power from the rectifier.
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37.发明申请公开(公告)号：US20180022576A1
公开(公告)日：2018-01-25
申请号：US15549076
申请日：2016-02-03
Applicant: OTIS ELEVATOR COMPANY
Inventor： Dong Jiang , Shashank Krishnamurthy , Daryl J. Marvin
Abstract: A drive and motor system and method for a six phase machine with negligible common-mode voltage is provided. The six-phase machine includes six phase windings divided into at least two windings groups configured to generate a zero common-mode pulse width modulation. The drive and motor system and method can also include at least one direct current source and a six phase inverter switching between positive and negative power of the at least one direct current source.
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公开(公告)号：US20170355555A1
公开(公告)日：2017-12-14
申请号：US15619871
申请日：2017-06-12
Applicant: Otis Elevator Company
Inventor： David Ginsberg , Shashank Krishnamurthy , Lei Xing , Penghe Geng , Ankit Anand Gupta , Yogesh Parmod Jadhav , Basavanagouda Goudra , Pramod Mandikal Gurukumar
CPC classification number: B66B1/3492 , B66B1/2433 , B66B1/40
Abstract: A method of operating an elevator system for a learn run sequence including the steps of moving, using a linear propulsion system, an elevator car through a lane of an elevator shaft at a selected velocity; detecting, using a sensor system, the location of the elevator car when it moves through the lane; controlling, using a control system, the elevator car, the control system being in operable communication with the elevator car, the linear propulsion system, and the sensor system; and determining, using the control system, a location of each of the car state sensors relative to each other within the lane in response to at least one of a travel time of the elevator car, a velocity of the elevator car, a position of the elevator car, and a height of the elevator car.
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公开(公告)号：US20170317607A1
公开(公告)日：2017-11-02
申请号：US15520471
申请日：2015-10-21
Applicant: Otis Elevator Company
Inventor： Ismail Agirman , Steven M. Millett , Daryl J. Marvin , Shashank Krishnamurthy
Abstract: A three-level converter includes a first converter leg having first switches connected across a positive DC node and a negative DC node, a second converter leg having second switches connected across the positive DC node and the negative DC node, and a third converter leg having third switches connected across the positive DC node the negative DC node. The converter includes a battery connected between the positive DC node and the negative DC node, and center-connected to a ground node having a ground potential. Each of the first, second, and third converter legs is connected to the ground node.
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公开(公告)号：US20170073183A1
公开(公告)日：2017-03-16
申请号：US15266452
申请日：2016-09-15
Applicant: OTIS ELEVATOR COMPANY
Inventor： David Ginsberg , Xiaodong Luo , Shashank Krishnamurthy , Dang V. Nguyen , Richard Fargo
CPC classification number: B66B1/32 , B66B5/06 , B66B9/003 , B66B11/0407
Abstract: An elevator control system is configured to control an elevator car constructed and arranged to move along a hoistway defined by a stationary structure. The elevator system may include a communication pathway and a hoistway control system supported by the stationary structure and configured to send a continuous brake command signal over the pathway. A car control system is carried by the elevator car and is configured to receive the continuous brake command signal and initiate a brake Ustop mode upon a loss of the brake command signal, and independent of the hoistway control system.
Abstract translation: 电梯控制系统被配置为控制构造和布置成沿着由固定结构限定的井道移动的电梯轿厢。 电梯系统可以包括通信路径和由静止结构支撑并且被配置为在该路径上发送连续的制动命令信号的井道控制系统。 轿厢控制系统由电梯轿厢承载，并被配置为接收连续制动指令信号，并且在制动指令信号丢失时启动制动Ustop模式，并且独立于井道控制系统。
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