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1. 发明公开

US20240106361A1 DRIVE SYSTEM AND CONTROL METHOD 审中-公开
公开(公告)号：US20240106361A1
公开(公告)日：2024-03-28
申请号：US18261539
申请日：2021-12-17
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Takumi ITO
IPC分类号： H02P21/09
CPC分类号： H02P21/09 , H02P2207/05
摘要： A drive system of an embodiment includes an initial phase command generation unit, a rotor phase detection unit, and a drive control unit. The initial phase command generation unit generates a phase command value corresponding to an initial phase of a rotor before startup of a synchronous motor. The rotor phase detection unit detects a phase of the rotor and outputs the phase. The drive control unit controls the driving of the synchronous motor by using the phase command value. The initial phase command generation unit adjusts the phase command value to approach the phase of the rotor of a detection result by using the detection result of the phase of the rotor detected before the startup by the rotor phase detection unit.

2. 发明公开

US20240322718A1 DRIVE SYSTEM AND CONTROL METHOD 审中-公开
公开(公告)号：US20240322718A1
公开(公告)日：2024-09-26
申请号：US18262689
申请日：2021-12-17
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Takumi ITO
IPC分类号： H02P6/20 , H02P6/06 , H02P6/16
CPC分类号： H02P6/20 , H02P6/06 , H02P6/16
摘要： A drive system according to an aspect of an embodiment includes a rotor phase detection unit, a phase estimation unit, a phase error adjustment unit, and a drive control unit. The rotor phase detection unit detects a phase of a rotor of a synchronous motor and outputs phase information indicating the detected phase. The phase estimation unit generates an initial phase command of defining a position of the rotor of the synchronous motor by using a correction amount for correcting a phase error. The phase error adjustment unit generates the correction amount for adjusting a phase error of an initial magnetic pole position of the synchronous motor by using a phase error of the initial phase command at a timing defined by the phase information. The drive control unit controls the driving of the synchronous motor by using the initial phase command obtained by adjusting the phase error.

3. 发明申请

US20230039054A1 DRIVE SYSTEM 有权
公开(公告)号：US20230039054A1
公开(公告)日：2023-02-09
申请号：US17759092
申请日：2020-01-22
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Soichiro ICHIKAWA , Masashi NAKAMURA , Takumi ITO
IPC分类号： H02P5/56 , H04L7/04
摘要： A master device (10) of a drive system (1) transmits identification information of each first period and a first transmission synchronization signal for each first period of a reference period including a plurality of first periods or transmits identification information of each first period, a first transmission synchronization signal, and a second transmission synchronization signal for each first period of the reference period. A first controller (31) adjusts a phase of each first control period such that the first control period is synchronized with a timing associated with a specific first synchronization signal out of a plurality of first synchronization signals which are acquired by reception of the first transmission synchronization signal a plurality of times using the identification information and controls a first power converter. A second controller (32) adjusts a phase of each second control period such that the second control period is synchronized with a timing associated with a specific second synchronization signal out of a plurality of second synchronization signals which are acquired by one of reception of the first transmission synchronization signal a plurality of times and reception of the second transmission synchronization signal a plurality of times using the identification information and controls a second power converter.

4. 发明公开

US20240120865A1 DRIVE SYSTEM AND CONTROL METHOD 审中-公开
公开(公告)号：US20240120865A1
公开(公告)日：2024-04-11
申请号：US18259427
申请日：2021-10-29
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Takumi ITO
IPC分类号： H02P21/18 , H02P21/00 , H02P21/34 , H02P27/06
CPC分类号： H02P21/18 , H02P21/0003 , H02P21/34 , H02P27/06 , H02P2207/05
摘要： A drive system according to an aspect of the embodiment includes a first phase estimation unit, a second phase estimation unit, a state determination unit, and a drive control unit. The first phase estimation unit generates a first phase obtained by estimating a phase of a rotor on the basis of an initial phase at a startup stage of the synchronous motor. The second phase estimation unit generates a second phase obtained by estimating the phase of the rotating rotor on the basis of the operation state of the synchronous motor. The state determination unit determines the operation state of the synchronous motor. The drive control unit controls the driving of the synchronous motor by using any one of the first phase and the second phase according to the determination result of the operation state of the synchronous motor. The first phase estimation unit corrects the first phase by using the detection result of the rotor position detected from the start of the startup procedure of the synchronous motor to the successful startup.

5. 发明公开

US20230297075A1 ELECTRIC MOTOR SPEED CONTROL APPARATUS AND ELECTRIC MOTOR SPEED CONTROL METHOD 审中-公开
公开(公告)号：US20230297075A1
公开(公告)日：2023-09-21
申请号：US17995958
申请日：2020-10-27
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Ufot Ufot EKONG , Takumi ITO , Masashi NAKAMURA
IPC分类号： G05B19/4155
CPC分类号： G05B19/4155 , G05B2219/37473
摘要： The electric motor speed control apparatus in an embodiment comprises a rotation speed estimation unit and a control unit. The rotation speed estimation unit generates an estimated value of a rotation speed of an electric motor by using a result of FFT analysis of a speed detection signal ωFBK, which is based on a detection result from a resolver for detecting the rotation speed of the electric motor, and the speed detection signal ωFBK. The control unit implements speed control so as to reduce deviation between the estimated value of the rotation speed and a speed command value for speed control of the electric motor.

6. 发明公开

US20230208308A1 POWER CONVERTER, POWER CONVERSION CONTROLLER, AND CONTROL METHOD 审中-公开
公开(公告)号：US20230208308A1
公开(公告)日：2023-06-29
申请号：US17995941
申请日：2020-05-21
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Takumi ITO , Kentaro NABESHIMA , Masashi NAKAMURA
IPC分类号： H02M5/458
CPC分类号： H02M5/458
摘要： A power converter includes a converter, an inverter, and a control unit. The converter converts electric power supplied from a power supply side to DC power. The inverter is provided on an output side of the converter. The control unit is configured to calculate a control difference between a target value for a target control voltage in a DC section provided on the output side of the converter and a feedback value using a DC voltage of the DC section as the feedback value, to perform a nonlinear operation process on the control difference, and to calculate an operation value based on a result of the nonlinear operation process and control the converter using the operation value.

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