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公开(公告)号：US10161735B2
公开(公告)日：2018-12-25
申请号：US13885836
申请日：2011-11-23
申请人： Rolf Strothmann
发明人： Rolf Strothmann
摘要： An apparatus for determining the position of the rotor of an electric machine in relation to the stator. The machine has multiple phases, each of which includes at least one pole winding with a magnetizable core. The apparatus includes devices for detecting measurement signals that are characterized by the momentary degrees of magnetization of the pole winding cores. The degrees of magnetization are influenced by the angular position of the magnetic field of the rotor. The devices are also used to detect the currents in the phases and determine the angular position of the rotor from the detected measurement signals, taking into account a contribution of the phase currents to the degrees of magnetization of the pole winding cores.
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公开(公告)号：US10069449B2
公开(公告)日：2018-09-04
申请号：US15800396
申请日：2017-11-01
IPC分类号： H02P25/08 , H02P25/089 , H02P6/185 , H02P6/18
摘要： A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; and estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
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公开(公告)号：US20180191288A1
公开(公告)日：2018-07-05
申请号：US15740152
申请日：2016-05-26
发明人： Dongsheng LI , Yasuo NOTOHARA , Yuuji YAMAMOTO
CPC分类号： H02P27/085 , H02P6/06 , H02P6/185 , H02P21/14 , H02P27/045 , H02P27/12
摘要： An inverter, motor drive device and freezing device, with which it is possible to effectively suppress current beats in the event of over-modulation without requiring additional circuits. This motor driving device includes: a rectifier circuit that converts the AC voltage from an AC power supply into a DC voltage; a smoothing capacitor that smoothes the DC voltage output from the rectifier circuit; an inverter circuit that converts the DC voltage output from the smoothing capacitor into an AC voltage; and a controller that reduces the current beat component by estimating, using a phase locked loop process, the frequency, phase and amplitude of the current beat component in the output current of the inverter circuit, and corrects the voltage command to the inverter circuit on the basis of the estimated frequency, phase and amplitude.
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公开(公告)号：US20180183368A1
公开(公告)日：2018-06-28
申请号：US15842082
申请日：2017-12-14
申请人： Minebea Mitsumi Inc.
发明人： Hiroaki MURAKAMI
IPC分类号： H02P6/185
摘要： A motor driving control device comprises: an induced voltage detecting unit configured to detect an induced voltage of a motor; a controller for generating a PWM signal corresponding to an energization timing of the motor; and an inverter circuit for outputting a driving signal for driving the motor to the motor based on the PWM signal generated by the controller, wherein the controller comprises: a position detecting unit configured to detect a position detection signal containing a rising or falling edge representing a timing at which a position of a rotor is a predetermined position; measuring unit configured to measure a zero-cross point of the induced voltage of the motor based on a detected timing of the edge of the position detection signal, and stopping output of the driving signal only for a predetermined period containing the zero-cross point of the induced voltage of the motor to measure a pulse width of a regenerated voltage of the motor in the period; a calculating unit configured to calculate a zero-cross point of coil current of the motor based on a measurement result of the measuring unit; and adjusting unit for adjusting the energization timing of the motor based on a calculation result of the calculating unit, the predetermined period being a period of one cycle of the PWM signal.
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55.发明申请公开(公告)号：US20180167009A1
公开(公告)日：2018-06-14
申请号：US15813690
申请日：2017-11-15
申请人： KONICA MINOLTA, INC.
摘要： A controller for a sensorless permanent magnet synchronous motor having a rotor using a permanent magnet, the rotor rotating by a rotating magnetic field, caused by a current flowing through an armature is provided. The controller is configured to apply a pulse voltage for generating a magnetic field vector for searching for the initial position to each of search sections obtained by dividing a target range, narrow down a target range in such a manner that a search section in which a largest amount of current flows through the armature by application of the pulse voltage is selected as a subsequent target range, and repeat the application processing and the narrow-down processing to estimate the initial position.
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公开(公告)号：US09948220B2
公开(公告)日：2018-04-17
申请号：US15653992
申请日：2017-07-19
申请人： DENSO CORPORATION
发明人： Kiyoshi Fujii , Atsuyuki Hiruma
CPC分类号： H02P6/185 , G05B2219/37523 , G05B2219/42148 , G05B2219/50191 , H02P6/18 , H02P21/26 , H02P25/03 , H02P25/22 , H02P2203/11
摘要： A rotation angle estimation apparatus includes: a high-frequency voltage setting unit that sets high-frequency voltages; a circuit operating unit that operates an electric power conversion circuit to apply each of the high-frequency voltages to a corresponding one of winding groups of a rotating electric machine; and a rotation angle estimating unit that estimates a rotation angle of the rotating electric machine based on at least one of high-frequency currents that flow in the winding groups upon application of the high-frequency voltages to the winding groups. Moreover, the high-frequency voltage setting unit sets the high-frequency voltages based on the spatial phase difference between the winding groups so that in a fixed coordinate system of the rotating electric machine, the magnitude of a resultant vector of a plurality of high-frequency voltage vectors, which are respectively applied to the winding groups, becomes smaller than the magnitude of each of the high-frequency voltage vectors.
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公开(公告)号：US20180062549A1
公开(公告)日：2018-03-01
申请号：US15247635
申请日：2016-08-25
申请人： Analog Devices, Inc.
摘要： The present disclosure provides a system and method to determine at least one parameter of a motor, such as an inductance. The inductance can be determined, such as based on one or more digitally sampled motor winding currents. A digital filter can be applied to the digital samples such as to determine a slope of the motor winding currents. The digital filter can include a least squares fit that can be applied to the digital samples, such as to determine a slope of the motor winding currents. The least squares fit can be determined based on a computation of central tendencies such as an average value of time, an average value of current, an average value of the square of time, and the average value of the product of time and current. The average values can be determined recursively to provide improved computational speed.
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公开(公告)号：US09825564B2
公开(公告)日：2017-11-21
申请号：US15000103
申请日：2016-01-19
发明人： David P. Magee , Shih-Chin Yang
摘要： A motor controller includes a square wave voltage generator and adding circuitry for adding the square wave voltage to a first drive voltage that is connectable to the stator windings of a motor. A current monitor for monitoring the input current to the motor as a result of the square wave voltage. A device for determining the position of the rotor based on the input current.
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公开(公告)号：US20170331398A1
公开(公告)日：2017-11-16
申请号：US15536396
申请日：2016-02-02
申请人： NSK Ltd.
发明人： Takayoshi SUGAWARA , Ryo MINAKI , Hideki SAWADA
CPC分类号： H02P6/085 , B62D5/046 , B62D5/0469 , B62D5/0496 , H02P6/04 , H02P6/10 , H02P6/17 , H02P6/185 , H02P23/00 , H02P29/64
摘要： [Problem]An object of the present invention is to provide a motor control unit that the heat generation of FETs is not concentrated in one FET and the heat generation is distributed to the plural FETs by operating the duties of all three-phases in a case that the driving of the motor is stopped.[Means for Solving the Problem]The present invention is the motor control unit comprising a current detector; an upper-stage maximum heat generation-phase specifying means to calculate respective heat generation amounts of upper-stage FETs and specify an upper-stage maximum heat generation phase; a lower-stage maximum heat generation-phase specifying means to calculate respective heat generation amounts of lower-stage FETs and specify a lower-stage maximum heat generation phase; an upper-stage selecting means to select an upper-stage selecting duty and an upper-stage selecting phase current based on the upper-stage maximum heat generation phase; a lower-stage selecting means to select a lower-stage selecting duty and a lower-stage selecting phase current based on the lower-stage maximum heat generation phase; a duty operating amount calculating section to calculate a duty operating amount; and a duty operating section to operate the respective phase duties based on the duty operating amount.
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公开(公告)号：US09758342B2
公开(公告)日：2017-09-12
申请号：US12941517
申请日：2010-11-08
申请人： Lauri Stolt , Tuukka Kauppinen
发明人： Lauri Stolt , Tuukka Kauppinen
CPC分类号： B66B1/30 , H02P6/185 , H02P2203/01 , H02P2203/05
摘要： Methods and an apparatuses for determining the movement of a synchronous machine are provided. An apparatus for determining the movement of a synchronous machine includes a determination for at least one electrical magnitude of the synchronous machine; a determination of the position error of the rotor of the synchronous machine, which is fitted to determine the position error of the rotor on the basis of the aforementioned at least one electrical magnitude of the synchronous machine; and also a correction of the movement signal of the incremental sensor, which is fitted to correct the read movement signal of the incremental sensor on the basis of the aforementioned determination of the position error of the rotor of the synchronous machine.
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