-
公开(公告)号：US20200031385A1
公开(公告)日：2020-01-30
申请号：US16484226
申请日：2017-03-27
摘要： There is provided an electric power steering device, including: a reverse steering detection unit configured to determine start of reverse steering when a magnitude of a rotational speed of a motor is equal to or smaller than a set speed, a rotational acceleration of the motor is in a direction of causing the rotational speed of the motor to become 0, and a magnitude of the rotational acceleration of the motor is equal to or larger than a set acceleration; and a current command control unit configured to output a current command for the motor based on the steering torque or the rotational speed of the motor, in which the current command control unit is configured to increase a transfer gain from input to output by the current command control unit when the reverse steering detection unit determines start of the reverse steering.
-
公开(公告)号：US20240136915A1
公开(公告)日：2024-04-25
申请号：US18269339
申请日：2021-04-13
发明人： Hiroya NATSUHARA , Isao KEZOBO , Tatsuya MORI , Chiaki FUJIMOTO , Atsushi ITO , Yusuke TAKARADA
CPC分类号： H02M1/325 , H02M1/0009 , H02M1/084 , H02M7/537
摘要： A power converter includes: a multiphase inverter circuit including a plurality of switching elements; a plurality of current sensors each configured to detect a current of the inverter circuit and output a value of the current detected; a terminal voltage detector configured to detect a voltage of each terminal of a load connected to the inverter circuit and output a value of the voltage detected; a switching element drive circuit configured to control the plurality of switching elements of the inverter circuit according to a switching pattern given; a fault detector configured to detect a fault in the inverter circuit or the plurality of current sensors; and a fault identifier configured to, after the fault detector detects the fault, switch the switching pattern to be given to the switching element drive circuit according to types of faults detectable by the fault detector, and perform identification processing of identifying a type and a location of the fault in the inverter circuit or the plurality of current sensors based on the value of the current detected by the plurality of current sensors or the value of the voltage detected by the terminal voltage detector during the control according to the switching pattern.
-
公开(公告)号：US20220181998A1
公开(公告)日：2022-06-09
申请号：US17598414
申请日：2019-06-27
发明人： Masahiko ORII , Isao KEZOBO , Tatsuya MORI , Genki FUJII
摘要： An electric motor control device, capable of suppressing a torque ripple even when electrical characteristics on a motor have errors or variations, comprises: a fundamental electric-current instruction generator for outputting d-axis and q-axis fundamental electric-current instructions for outputting fundamental torque from the motor having saliency; a position dependency component generator for outputting a position dependency component(s) of the motor according to its rotational position; an electric current correction instruction calculator for calculating d-axis and q-axis current correction instructions from the d-axis and q-axis fundamental electric-current instructions, and the position dependency component(s); an electric current correction instruction superposition unit for generating d-axis and q-axis current instructions by performing superposition of the d-axis and q-axis current correction instructions on the d-axis and q-axis fundamental electric-current instructions; and an electric current controller for controlling a current to flow through the motor by an inverter, based on the d-axis and q-axis current instructions.
-
4.发明申请公开(公告)号：US20200300671A1
公开(公告)日：2020-09-24
申请号：US16085668
申请日：2016-04-28
发明人： Tatsuya MORI , Isao KEZOBO , Munenori YAMAMOTO , Akira FURUKAWA
IPC分类号： G01D5/244 , G01R31/42 , G01R35/00 , H02P29/024
摘要： Provided are a failure determination device and method for a rotating machine control device, which are capable of detecting failure of a sensor configured to detect a rotational position of a rotating machine while the rotating machine is in operation. A rotation angle estimator calculates a rotation angle estimation value. A relationship between the rotation angle estimation value (θest), and a first angle detection value (θ1) and a second angle detection value (θ2), which are obtained from output signals of angle sensors configured to detect a rotational position of a rotating machine, is monitored while the rotating machine is in operation. In this manner, failure of the angle sensors, which are configured to detect the rotational position of the rotating machine, can be always detected even while the rotating machine is in operation.
-
公开(公告)号：US20200153375A1
公开(公告)日：2020-05-14
申请号：US16614614
申请日：2017-07-04
发明人： Tatsuya MORI , Akira FURUKAWA , Isao KEZOBO
IPC分类号： H02P27/08 , H02M7/5387 , H02M1/00 , B62D5/04
摘要： An inverter device includes: an inverter, a power supply current detection sensor, a phase current detection sensor, a three-phase voltage command calculator, and an inverter on/off signal generation unit. The phase current detection sensor detects a phase current in one phase of the inverter. The inverter on/off signal generation unit generates on/off signals based on the phase voltage commands. The three-phase voltage command calculator uses the power supply current and the phase current detected by the power supply current detection sensor and the phase current detection sensor, respectively, so as to calculate phase voltage commands directed to the inverter, and at a center time point of a period in which an upper arm switching element corresponding to one phase out of two phases for which the phase current detection sensor is not provided is on, and lower arm switching elements corresponding to the other two phases are on.
-
公开(公告)号：US20190389506A1
公开(公告)日：2019-12-26
申请号：US16481190
申请日：2017-03-07
发明人： Yuya TSUCHIMOTO , Isao KEZOBO , Yuji TAKATSUKA , Akira FURUKAWA
摘要： An electric power steering apparatus includes: a torque sensor configured to detect a steering torque of a driver; a motor configured to assist in a steering force of the driver; a rotation angle estimation unit configured to estimate a rotation angle of the motor to output an estimated angle; a correction signal calculation unit configured to calculate a correction signal based on the steering torque; a frequency separation unit configured to separate the estimated angle into a first frequency component and a second frequency component; an estimated angle correction unit configured to calculate, as a control angle, a value obtained by adding a second-frequency-component corrected signal, which is obtained by correcting the second frequency component based on the correction signal, to the first frequency component; and an electric power supply unit configured to supply electric power to the motor based on the control angle.
-
公开(公告)号：US20180294755A1
公开(公告)日：2018-10-11
申请号：US15569136
申请日：2015-04-27
发明人： Tatsuya MORI , Shunsuke NAKAJIMA , Isao KEZOBO
摘要： This invention is concerning a control device of an AC rotating machine that estimates, as an estimated rotational position, a rotational position of an AC rotating machine having N sets of three-phase windings where N is a natural number equal to or greater than 2, the device being made up of: a voltage sum calculator that calculates a voltage sum from N sets of voltage commands for applying AC voltage to the N sets of three-phase windings; a current sum calculator that calculates a current sum from N sets of currents respectively flowing in the N sets of three-phase windings; and a rotational position estimator that calculates an estimated rotational position on the basis of calculation results of the voltage sum calculator and the current sum calculator.
-
公开(公告)号：US20160072416A1
公开(公告)日：2016-03-10
申请号：US14442224
申请日：2013-02-12
发明人： Yu HIROTANI , Yuji TAKIZAWA , Tatsuya MORI , Isao KEZOBO , Yoshihiko KIMPARA
CPC分类号： H02P6/10 , H02K1/276 , H02K1/278 , H02P21/05 , H02P21/22 , H02P25/022 , H02P25/024 , H02P25/22 , H02P29/02 , H02P29/028
摘要： [Object] To effectively improve torque of a motor, the maximum rotation rate in driving with no load, and output at a high rotation rate, while suppressing torque ripple, noise, or vibration of the motor.[Solution] A brushless motor 301 has an armature iron core 310 wound with armature windings including plural winding sets 311 and 312 each of which includes multi-phase windings. Voltage application means 302 applies voltages to the plural winding sets. Control means 303 calculates a voltage command for the plural winding sets, and controls the voltage application means based on the voltage command. The control means 303 controls the voltage application means 302 so that induced voltages generated in the plural winding sets by rotation of the brushless motor have a trapezoidal waveform and a phase difference between the voltages for the plural winding sets becomes a value that reduces torque ripple caused by the induced voltages.
摘要翻译： [目的]为了有效地提高电动机的转矩，无负载驱动时的最大转速，并且以高转速输出，同时抑制电动机的转矩波动，噪声或振动。 [解决方案]无刷电动机301具有缠绕有电枢绕组的电枢铁心310，该电枢绕组包括多个绕组311和312，每个线圈组包括多相绕组。 电压施加装置302向多个绕组组施加电压。 控制装置303计算多个绕组的电压指令，并根据电压指令控制电压施加装置。 控制装置303控制电压施加装置302，使得通过无刷电动机的旋转在多个绕组中产生的感应电压具有梯形波形，并且多个绕组组的电压之间的相位差成为减小转矩波动的值 通过感应电压。
-
公开(公告)号：US20230097479A1
公开(公告)日：2023-03-30
申请号：US17795576
申请日：2020-05-22
发明人： Yuya TSUCHIMOTO , Tatsuya MORI , Akira FURUKAWA , Isao KEZOBO , Genki FUJII
摘要： A permanent-magnet-synchronous electric motor control device includes: a reference voltage value calculation unit for calculating a reference voltage value; an output voltage value calculation unit for calculating an output voltage value on the basis of a voltage command; a current weakening command calculation unit for calculating a current weakening command on the basis of the reference voltage value and the output voltage value; a voltage command calculation unit for calculating the voltage command on the basis of the current weakening command; and a power converter for supplying power to a permanent-magnet-synchronous electric motor on the basis of the voltage command. The current weakening command calculation unit calculates the current weakening command in which a high-frequency component is amplified on the basis of the difference between the reference voltage value and the output voltage value.
-
公开(公告)号：US20210058018A1
公开(公告)日：2021-02-25
申请号：US16964667
申请日：2018-03-13
发明人： Yuya TSUCHIMOTO , Isao KEZOBO , Akira FURUKAWA
IPC分类号： H02P21/22 , H02P25/22 , B62D5/04 , H02P25/022
摘要： A control device includes: a first power converter applying a voltage to a first winding; a second power converter applying a voltage to a second winding; a first power supply circuit supplying power to the first power converter; a second power supply circuit supplying power to the second power converter; a current command calculator; a first current controller; and a second current controller. The second power supply circuit supplies power at a voltage higher than a voltage of the first power supply circuit. The current command calculator calculates a first voltage usage state, which is an indicator value correlated with a magnitude of the output voltage of the first power converter with respect to a power supply voltage output at a time of supply of power by the first power supply circuit, and calculates the second current command based on the first voltage usage state.
-
-
-
-
-
-
-
-
-
搜索结果
34 条记录 (耗时 0.022 秒)
