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公开(公告)号：US10734932B2
公开(公告)日：2020-08-04
申请号：US16381076
申请日：2019-04-11
申请人： KONICA MINOLTA, INC.
摘要： A motor controller that controls a motor in which a rotor using a permanent magnet is rotated by a rotating magnetic field due to a current flowing through a winding: performs hold control that continuously causes a fixed excitation current to flow through the winding to cause a fixed magnetic field for suppressing rotation of the rotor to be generated in a suspension period in which the motor is stopped; performs hold enhancement control that enhances the fixed magnetic field with input of a timing signal defined in advance as a trigger, in the suspension period; and starts rotational excitation control that generates the rotating magnetic field when a rotation start timing arrives.
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公开(公告)号：US11223309B2
公开(公告)日：2022-01-11
申请号：US16794043
申请日：2020-02-18
申请人： KONICA MINOLTA, INC.
发明人： Hiroyuki Yoshikawa , Yuta Tachibana , Yuji Kobayashi , Kazumichi Yoshida , Daichi Suzuki , Harumitsu Fujimori
摘要： In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.
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公开(公告)号：US11990856B2
公开(公告)日：2024-05-21
申请号：US17854777
申请日：2022-06-30
申请人： Konica Minolta, Inc.
摘要： A rotation detector includes a motor, a current detector and a hardware processor. The motor includes coils of two or more phases and a rotor. The current detector detects currents flowing in coils of at least two phases among the coils of two or more phases. The hardware processor estimates an initial position of the rotor based on current values of the currents detected by the current detector to start the motor, controls an energization pattern on the phases to rotate and start the motor based on the estimated initial position, and determines whether the rotor stops or is rotating before completing the estimation of the initial position.
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4.发明申请公开(公告)号：US20180175751A1
公开(公告)日：2018-06-21
申请号：US15839981
申请日：2017-12-13
申请人： Konica Minolta, Inc.
CPC分类号： H02P3/025 , G03G15/6529 , H02P3/14 , H02P21/36
摘要： A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet is provided. The rotor rotates by a rotating magnetic field caused by a current flowing through an armature. The controller starts a deceleration control of reducing a rotational speed of the rotor when a stop command is inputted in a state where the rotor rotates at a predetermined rotational speed; and performs a fixed excitation control when the rotational speed is reduced to a set speed. The fixed excitation control includes setting a current for causing a magnetic field vector for stopping the rotor at a target position in accordance with an amount of rotation of the rotor since the deceleration control has started and passing the current through the armature.
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公开(公告)号：US11218101B2
公开(公告)日：2022-01-04
申请号：US16815588
申请日：2020-03-11
申请人： Konica Minolta, Inc.
发明人： Yuta Tachibana , Hiroyuki Yoshikawa , Yuji Kobayashi , Kazumichi Yoshida , Daichi Suzuki , Harumitsu Fujimori
摘要： In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a γ-axis current component Iγ corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.
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公开(公告)号：US20190341866A1
公开(公告)日：2019-11-07
申请号：US16381076
申请日：2019-04-11
申请人： KONICA MINOLTA, INC.
摘要： A motor controller that controls a motor in which a rotor using a permanent magnet is rotated by a rotating magnetic field due to a current flowing through a winding: performs hold control that continuously causes a fixed excitation current to flow through the winding to cause a fixed magnetic field for suppressing rotation of the rotor to be generated in a suspension period in which the motor is stopped; performs hold enhancement control that enhances the fixed magnetic field with input of a timing signal defined in advance as a trigger, in the suspension period; and starts rotational excitation control that generates the rotating magnetic field when a rotation start timing arrives.
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公开(公告)号：US11233471B2
公开(公告)日：2022-01-25
申请号：US16737093
申请日：2020-01-08
申请人： KONICA MINOLTA, INC.
发明人： Daichi Suzuki , Yuji Kobayashi , Kazumichi Yoshida , Harumitsu Fujimori , Yuta Tachibana , Hiroyuki Yoshikawa
IPC分类号： H02P6/185 , H02P21/18 , G03G15/00 , H02P6/15 , H02P6/06 , H02P6/08 , H02P6/22 , H02P6/28 , H02P27/08 , H02P6/17
摘要： A control circuit of a motor control device estimates an initial magnetic pole position of a rotor using an inductive sensing scheme. When estimating the initial magnetic pole position, a drive circuit applies a voltage to a stator winding at each of L electrical angles (L≥5) while changing the L electrical angles. An absolute value of an electrical angle difference of the voltage applied to the stator winding between an i-th time (2≤i≤L) and an i−1st time is 180−360/L degrees or more and 180+360/L degrees or less. An absolute value of an electrical angle difference of the voltage applied to the stator winding between a 1st time for initial position estimation and a last time before starting initial position estimation is 180−360/L degrees or more and 180+360/L degrees or less.
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公开(公告)号：US20190068099A1
公开(公告)日：2019-02-28
申请号：US16108277
申请日：2018-08-22
申请人： KONICA MINOLTA, INC.
摘要： A motor controller for controlling a brushless DC motor is provided. The motor controller includes a vector control unit configured to perform a sensorless vector control on the brushless DC motor in accordance with an input command value; a storage portion configured to store time-series control target values so that an amount of rotation angle of the brushless DC motor transitions in a same manner as an expected pattern; and a command portion configured to input, to the vector control unit, the control target values serially as the command value.
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