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31. 发明授权

US10547256B2 Motor driving apparatus capable of reliably starting motor, and method of controlling same 有权
公开(公告)号：US10547256B2
公开(公告)日：2020-01-28
申请号：US16180549
申请日：2018-11-05
申请人： CANON KABUSHIKI KAISHA
发明人： Hiroshi Akada
IPC分类号： H02P6/18 , H02P6/20
摘要： A motor driving apparatus includes a motor and a control circuit that controls driving of the motor. The motor includes a rotor having a cylindrical magnet having an outer peripheral surface circumferentially divided and alternately multi-polar magnetized to different poles, a first and second yokes having first and second magnetic pole portions arranged opposed to the outer peripheral surface, a first and second coils energized to excite the first and second magnetic pole portions, respectively. Directions of energizing the first and second coils are switched based on outputs from magnetic sensors that detect a rotational position of the rotor to change excited poles of the first and second magnetic pole portions. The rotor is started from a stopped state, after performing direct current energization to move the rotor to a position dependent on the direct current energization.

32. 发明授权

US10514011B2 Starting power generation apparatus and starting power generation method 有权
公开(公告)号：US10514011B2
公开(公告)日：2019-12-24
申请号：US15766431
申请日：2016-10-04
申请人： SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.
发明人： Tatsuya Arai
IPC分类号： F02N11/04 , H02P9/04 , F02N11/08 , H02P6/28 , H02P6/182 , H02P1/46 , H02P6/18 , H02P6/20 , H02P9/00 , H02K21/22 , H02K3/28 , H02K29/03
摘要： A starting power generation apparatus according to an embodiment of the present invention includes: a starter generator including a field portion having a permanent magnet, and an armature unit including a first multi-phase winding and a second multi-phase winding which are arranged in parallel; a first power conversion unit including a first positive-side DC terminal connected to a battery and a plurality of first AC terminals connected to the first multi-phase winding, the first power conversion unit being configured to convert a power bidirectionally between DC and AC; a second power conversion unit including a plurality of second AC terminals connected to the second multi-phase winding, the second power conversion unit being configured to control a current to be input and output via the second AC terminals; and a control unit configured to detect a positional relationship between the field portion and the armature unit based on an output voltage of the second multi-phase winding, and control the first power conversion unit and the second power conversion unit in accordance with the positional relationship detected. The control unit is configured to detect the positional relationship when the starter generator is stopped, based on time widths of two or more predetermined voltages generated in two or more windings constituting the second multi-phase winding in a case that an output voltage of the battery is applied to the first multi-phase winding for a predetermined time in a state where current input and output via the second AC terminals is off.

33. 发明授权

US10480475B2 Starting power generation apparatus and starting power generation method 有权
公开(公告)号：US10480475B2
公开(公告)日：2019-11-19
申请号：US15766431
申请日：2016-10-04
申请人： SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.
发明人： Tatsuya Arai
IPC分类号： F02N11/04 , H02P9/04 , F02N11/08 , H02P6/28 , H02P6/182 , H02P1/46 , H02P6/18 , H02P6/20 , H02P9/00 , H02K21/22 , H02K3/28 , H02K29/03
摘要： A starting power generation apparatus according to an embodiment of the present invention includes: a starter generator including a field portion having a permanent magnet, and an armature unit including a first multi-phase winding and a second multi-phase winding which are arranged in parallel; a first power conversion unit including a first positive-side DC terminal connected to a battery and a plurality of first AC terminals connected to the first multi-phase winding, the first power conversion unit being configured to convert a power bidirectionally between DC and AC; a second power conversion unit including a plurality of second AC terminals connected to the second multi-phase winding, the second power conversion unit being configured to control a current to be input and output via the second AC terminals; and a control unit configured to detect a positional relationship between the field portion and the armature unit based on an output voltage of the second multi-phase winding, and control the first power conversion unit and the second power conversion unit in accordance with the positional relationship detected. The control unit is configured to detect the positional relationship when the starter generator is stopped, based on time widths of two or more predetermined voltages generated in two or more windings constituting the second multi-phase winding in a case that an output voltage of the battery is applied to the first multi-phase winding for a predetermined time in a state where current input and output via the second AC terminals is off.

34. 发明授权

US10476414B2 Method of controlling electric motors, corresponding device and motor 有权
公开(公告)号：US10476414B2
公开(公告)日：2019-11-12
申请号：US15377911
申请日：2016-12-13
申请人： STMicroelectronics Design and Application S.R.O. , STMicroelectronics S.r.l.
发明人： Jiri Ryba , Gianluigi Forte , Andrea Spampinato
IPC分类号： H02P6/18 , H02P25/03
摘要： A driving circuit for an electric motor including multiple windings includes a sensing circuit to sense motor winding currents. A motor rotation angle signal is generated from the sensed currents and motor control voltages are generated as a function of the motor rotation angle signal. The motor windings are driven with motor drive voltages obtained by injecting into the motor control voltages injection pulses. The sensed currents include both torque components and injection components. The motor rotation angle signal is generated as a function of the injection components of the sensed currents.

35. 发明授权

US10472194B2 Current detecting device, motor controlling system, image forming apparatus, sheet conveying device, robot, and current detecting method 有权
公开(公告)号：US10472194B2
公开(公告)日：2019-11-12
申请号：US15397054
申请日：2017-01-03
申请人： Takeo Seki , Haruyuki Suzuki , Takuya Murata , Hiroyuki Kiguchi
发明人： Takeo Seki , Haruyuki Suzuki , Takuya Murata , Hiroyuki Kiguchi
IPC分类号： G01R15/14 , B65H7/20 , B65H5/06 , G03G15/00 , H02P6/18 , H04N1/00 , H02P6/16 , H02P6/28 , G01R19/00 , H02P27/08
摘要： A current detecting device includes: a drive signal generating unit configured to generate a control signal based on a control voltage value indicating drive force to be applied to a target; a current detecting unit configured to detect a current value output based on the control signal generated by the drive signal generating unit; and a correction unit configured to correct the current value detected by the current detecting unit, based on at least a magnitude of the control voltage value.

36. 发明授权

US10439526B2 Load-adaptive smooth startup method for sensorless field-oriented control of permanent magnet synchronous motors 有权
公开(公告)号：US10439526B2
公开(公告)日：2019-10-08
申请号：US15996603
申请日：2018-06-04
申请人： LINESTREAM TECHNOLOGIES
发明人： Gang Tian
IPC分类号： H02P21/00 , H02P6/18 , H02P6/20 , H02P6/21 , H02P21/34 , H02P6/182
摘要： A field oriented control (FOC) system and method provides smooth field-oriented startup for three-phase sensorless permanent magnet synchronous motors (PMSMs) despite the absence of load information. The system uses the rotor flux projection on the d- or q-axis to determine whether the stator flux current reference being applied during reference startup phase is sufficient to spin the PMSM, thereby providing smooth operation during the reference startup phase and saving energy relative to applying rated current. The system also determines a suitable initial value for the stator torque current reference to use at the start of closed-loop sensorless FOC control mode based on an angle difference between the reference and estimated angles. Since this angle difference is reflective of the load on the PMSM, the selected initial value allows the system to achieve a smooth transition from reference startup mode to closed-loop sensorless FOC control mode.

37. 发明申请

US20190280631A1 METHOD AND CIRCUIT ARRANGEMENT FOR DETERMINING THE POSITION OF A ROTOR IN AN ELECTRIC MOTOR 审中-公开
公开(公告)号：US20190280631A1
公开(公告)日：2019-09-12
申请号：US16336241
申请日：2017-11-21
申请人： SCHAEFFLER TECHNOLOGIES AG & CO. KG
发明人： Andreas THOELKE , Christian KARBACHER
IPC分类号： H02P6/185 , H02P6/00 , H02P6/18
摘要： A circuit, comprising a plurality of phase windings in an electric motor, an inverter configured to excite the phase windings by a sequence of voltage pulses including a plurality of successive voltage pulses that a current can be set in each of the phase windings, wherein the voltage pulses are selected in such a manner that a positive and a negative current are produced in all the phase windings during the voltage pulses, a current sensor for measuring a peak value for the current being set during a duration of each voltage pulse in each phase winding, and an evaluation circuit connected to the current sensor, wherein the evaluation circuit is configured to determine the voltage pulse in the voltage pulse sequence during a duration of which peak current value having a greatest magnitude was measured.

38. 发明授权

US10374535B2 Motor control apparatus and motor drive apparatus 有权
公开(公告)号：US10374535B2
公开(公告)日：2019-08-06
申请号：US15690827
申请日：2017-08-30
申请人： Kabushiki Kaisha Toshiba
发明人： Shen Wang
IPC分类号： H02P6/16 , H02P6/17 , H02P6/18 , H02K11/215
摘要： According to an embodiment, a motor control apparatus includes a current detecting unit that detects a motor current, a rotation position detecting unit that detects a rotation position of a rotor, a phase difference calculating unit that calculates first phase difference information between the motor current and the rotation position when a rotation speed of a motor is equal to or lower than a predetermined rotation speed and second phase difference information when the rotation speed of the motor exceeds the predetermined rotation speed, a storage unit that stores phase correction information based on the first phase difference information, a correcting unit that outputs a corrected rotation position signal and a drive unit that generates a drive signal to be output to the motor.

39. 发明授权

US10361648B2 System and method for starting synchronous motors 有权
公开(公告)号：US10361648B2
公开(公告)日：2019-07-23
申请号：US15802246
申请日：2017-11-02
申请人： Microchip Technology Incorporated
发明人： Weizi Wang
IPC分类号： H02P6/00 , H02P21/00 , H02P21/18 , H02P6/04 , H02P6/18 , H02P21/34 , H02P1/02 , H02P21/10
摘要： To avoid control failure resulting from startup of a PMSM that is windmilling, initial speed and position are determined before startup. A controller uses a FOC routine having a speed PI control loop, field-weaken control, a current PI control loop, and a speed observer. When the controller receives an instruction to start the PMSM, it delays startup and executes an “estimation” stage, in which the controller executes the FOC routine but with the speed PI control loop and the field-weaken control disabled. The estimation stage is repeated multiple times, with estimates converging to actual speed and position through successive iterations. When estimated speed and position values have stabilized, the motor is started using the estimates as initial speed and position for driving the PMSM. The FOC routine, with the speed PI control loop and the field-weaken control enabled, is used to drive the PMSM.

40. 发明授权

US10348230B2 Control device for AC rotary machine and magnetic-pole-position correction amount calculation method 有权
公开(公告)号：US10348230B2
公开(公告)日：2019-07-09
申请号：US15323979
申请日：2015-07-02
申请人： Mitsubishi Electric Corporation
发明人： Yosuke Hachiya , Kunihiro Kawahara
IPC分类号： H02P21/16 , H02P6/30 , B60L15/20 , H02P21/18 , H02P6/18 , G01D18/00 , H02P27/08 , H02P6/16 , G01D5/20
摘要： A control device for an AC rotary machine includes a magnetic-pole-position correction amount calculation device that calculates a magnetic-pole-position correction amount based on a detection-current vector detected when a voltage application device applies a voltage to the AC rotary machine according to a voltage command and on the voltage command, and stores in a storage device the magnetic-pole-position correction amount as it is associated with the detection-current vector. At normal operation of the AC rotary machine, a voltage-vector command generation device generates a voltage command for normal operation based on the detection-current vector detected by a current vector detection device and the magnetic-pole-position correction amount associated with the detection-current vector.

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