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公开(公告)号：US09973138B2
公开(公告)日：2018-05-15
申请号：US15328334
申请日：2015-09-02
Inventor： Yoshikazu Sengokudani , Mitsuhiro Sakamoto , Hideharu Hiwaki
CPC classification number: H02P29/68 , D06F33/02 , D06F37/40 , H02P6/20 , H02P29/032
Abstract: A brushless motor includes: a motor including a stator around which a winding wire is wound and a rotor holding a permanent magnet; a motor control microcomputer; an inverter circuit in which a power element is incorporated and controls an amount of a voltage applied to the winding wire; a temperature detecting element which detects a temperature of the power element; and a current detecting element which detects a power supply current or a current of the winding wire. A first current limit value is defined by current limit value which is set such that a junction temperature of the power element does not exceed a predetermined value, the brushless motor sets a second current limit value which is higher than the first current limit value, and the brushless motor operates, based on the second current limit value only in a predetermined period after start-up of the brushless motor.
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公开(公告)号：US12249940B2
公开(公告)日：2025-03-11
申请号：US18042789
申请日：2021-07-07
Inventor： Mitsuhiro Sakamoto
Abstract: A motor including a first terminal and a second terminal to which a single-phase AC is input includes a third terminal, an AC/DC converter that converts a single-phase AC into a DC, an inverter that is PWM-controlled by a PWM signal to convert the DC into a three-phase AC, a controller that outputs a PWM signal to the inverter, and a detection circuit connected to the third terminal, in which the detection circuit outputs any one of a first detection signal, a second detection signal, and a third detection signal, and the controller outputs a PWM signal to be in a first rotation state when the detection circuit outputs the first detection signal, to be in a second rotation state when the detection circuit outputs the second detection signal, and to be in a third rotation state when the detection circuit outputs the third detection signal.
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公开(公告)号：US20210234493A1
公开(公告)日：2021-07-29
申请号：US17257116
申请日：2019-06-21
Inventor： Shinsuke Kimura , Mitsuhiro Sakamoto
IPC: H02P29/024 , H02P6/28
Abstract: A motor device includes a motor and a processing unit to control the motor. The processing unit transmits a current signal to a controller, which is electrically connected to the motor, by causing a current to flow through windings of the motor.
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Patent Agency Ranking
公开(公告)号：US11828291B2
公开(公告)日：2023-11-28
申请号：US17256775
申请日：2019-06-24
Inventor： Mitsuhiro Sakamoto , Shinsuke Kimura , Yasuyuki Yokouchi
CPC classification number: F04D25/0693 , F04D27/001
Abstract: A motor device includes a motor, an input unit, a processing unit, and an electrical energy storage unit. The input unit accepts power supplied from a controller during a first period and receives at least a communication signal transmitted from the controller during a second period after the first period. The processing unit updates data for the motor in accordance with the communication signal received by the input unit. The electrical energy storage unit stores, based on the power supplied to the input unit, electrical energy for driving the processing unit.
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5.发明授权公开(公告)号：US10469013B2
公开(公告)日：2019-11-05
申请号：US16287601
申请日：2019-02-27
Inventor： Mitsuhiro Sakamoto , Yasuyuki Yokouchi , Daisuke Sonoda , Ryuta Sasaki
Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.
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公开(公告)号：US20210140441A1
公开(公告)日：2021-05-13
申请号：US17256775
申请日：2019-06-24
Inventor： Mitsuhiro Sakamoto , Shinsuke Kimura , Yasuyuki Yokouchi
Abstract: A motor device includes a motor, an input unit, a processing unit, and an electrical energy storage unit. The input unit accepts power supplied from a controller during a first period and receives at least a communication signal transmitted from the controller during a second period after the first period. The processing unit updates data for the motor in accordance with the communication signal received by the input unit. The electrical energy storage unit stores, based on the power supplied to the input unit, electrical energy for driving the processing unit.
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7.发明授权公开(公告)号：US10270377B2
公开(公告)日：2019-04-23
申请号：US15325309
申请日：2016-01-26
Inventor： Mitsuhiro Sakamoto , Yasuyuki Yokouchi , Daisuke Sonoda , Ryuta Sasaki
Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.
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公开(公告)号：US09929683B2
公开(公告)日：2018-03-27
申请号：US15328149
申请日：2015-08-28
Inventor： Daisuke Sonoda , Mitsuhiro Sakamoto , Toru Tazawa
Abstract: Provided is a motor drive device which performs switching, with respect to a synchronous motor including a stator around which a motor winding is wound and a rotor holding a permanent magnet, from a synchronous operation in which the synchronous motor is synchronously driven to position-sensorless vector control in which a current supplied to the motor winding is controlled based on a position of the rotor. During the synchronous operation, the present motor drive device calculates, by estimation, an induced voltage error based on the detected current and voltage, performs control of an amplitude of a current instruction such that an error, of a target induced voltage, calculated based on an estimated induced voltage and based on an internal angle becomes equal to the induced voltage error, and switches the mode to the sensorless mode after the error is reduced to be within a range of a predetermined value. Further, by gradually reducing the current instruction during the synchronous operation, the absolute value of the induced voltage error is reduced to be within a range of the predetermined value.
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