公开(公告)号：US09461571B2

公开(公告)日：2016-10-04

申请号：US14714426

申请日：2015-05-18

Applicant: MELEXIS TECHNOLOGIES NV

Inventor： Marcel Jakobus Gerardus Braat ,  Marc Lambrechts

IPC: H02H7/08 ,  H02P8/36 ,  H02P8/38 ,  H02P8/22

CPC classification number: H02P8/38 ,  H02P8/22 ,  H02P8/36 ,  H02P29/0241

Abstract: A method of detecting stall of a multi-phase motor operated in a micro-stepped mode, the method comprising: a) applying at least two phase-shifted micro-stepped waveforms to the phase windings of the motor; b) determining a sum of currents flowing through the phase windings, and taking samples of the sum of currents synchronously with the application of the micro-stepped waveforms; c) calculating a moving average or moving sum of the samples over one or more “full steps” of the phase-shifted waveforms; d) calculating an adaptive threshold based on the samples; e) detecting stall of the motor when the moving average is larger than the adaptive threshold. An electrical circuit and a computer program are arranged to perform the method.

Abstract translation: 一种检测以微步进模式操作的多相电动机的失速的方法，所述方法包括：a）将至少两个相移的微步进波形施加到所述电动机的相绕组; b）确定流过相绕组的电流之和，并与微步波形的应用同步地获取电流之和; c）通过相移波形的一个或多个“全步”来计算样本的移动平均或移动和; d）基于样本计算自适应阈值; e）当移动平均值大于自适应阈值时，检测电机的失速。 布置电路和计算机程序来执行该方法。

公开(公告)号：US10066967B2

公开(公告)日：2018-09-04

申请号：US15468730

申请日：2017-03-24

Applicant: MELEXIS TECHNOLOGIES NV

Inventor： Dirk Leman ,  Marc Lambrechts ,  Zuo Xing ,  Zhang Huowen

IPC: G01D5/20

Abstract: A method for detecting rotor position for a single coil DC motor or 2-coil DC motor with non-parallel windings, with no need of Hall position sensor. The method comprises applying a first respectively second probe pulse for generating a first response pulse having a first direction or polarity and a second response pulse having a second direction or polarity. The probe pulses are adapted so they do not substantially move the rotor with respect to the stator, but affect the magnetic properties of the stator. By comparing the measured effects caused by the probe pulses, the initial position of the rotor with respect to the stator is determined. A method for start-up, a motor driver circuit, and a motor assembly comprising said motor and driver circuit are also provided.

公开(公告)号：US08963473B2

公开(公告)日：2015-02-24

申请号：US13932488

申请日：2013-07-01

Applicant: Melexis Technologies NV

Inventor： Bart Lauwaert ,  Marc Lambrechts

IPC: H02P8/34 ,  H02P7/29 ,  H02P5/68

CPC classification number: H02P8/34 ,  H02P5/68 ,  H02P7/2913

Abstract: A system comprising a motor controller for providing a plurality of first power signals and a single common second power signal to a motor module comprising a plurality of potentiometers connectable to a plurality of DC-motors. The power signals and feedback signals are sent over a wire interface having less than three wires per motor. A position feedback signal is read when a motor is being powered. The power signals may be DC-signals, pulsed or tri-state signals. The circuit may have a voltage divider consisting of two or three resistors. The actual motor position can be derived from the position feedback signals using one of two formulas or curves. A motor controller, and a method for driving a plurality of DC-motors is also disclosed.

Abstract translation: 一种系统，包括用于向电动机模块提供多个第一功率信号和单个公共第二功率信号的电动机控制器，所述电动机模块包括可连接到多个DC电动机的多个电位计。 电力信号和反馈信号通过每个电机具有少于三根电线的电线接口发送。 当电机通电时，读取位置反馈信号。 功率信号可以是直流信号，脉冲或三态信号。 该电路可以具有由两个或三个电阻器组成的分压器。 可以使用两个公式或曲线之一从位置反馈信号中导出实际的电机位置。 还公开了一种电动机控制器和用于驱动多个DC电动机的方法。

公开(公告)号：US11165380B2

公开(公告)日：2021-11-02

申请号：US16867816

申请日：2020-05-06

Applicant: Melexis Technologies NV

Inventor： Marc Lambrechts

IPC: H02P21/09

Abstract: A lead angle estimator is provided for estimating a lead angle of a brushless DC motor. The lead angle is the angle between a phase-voltage-vector of a phase-voltage, and a phase-current-vector of a phase-current. The lead angle estimator comprises a sampling unit and a processing unit. The sampling unit is adapted for obtaining phase-samples, which are a measure of the phase-current. The processing unit is adapted for estimating the lead angle by calculating a difference of the phase-samples in a extremum period around a maximum or around at least the phase-voltage, and by normalizing the obtained difference.

公开(公告)号：US10171018B2

公开(公告)日：2019-01-01

申请号：US15629977

申请日：2017-06-22

Applicant: Melexis Technologies NV

Inventor： Marcel Jakobus Gerardus Braat ,  Marc Lambrechts

IPC: H02H7/08 ,  H02P8/38 ,  H02P6/28 ,  H02P8/22 ,  H02P8/36

Abstract: A method for detecting stall of a multiphase motor operated in a sinusoidal micro-stepped mode. The method comprises: a) measuring at least one phase current and/or measuring the sum of all phase currents at regular time intervals synchronous with the micro-steps, b) calculating the difference between the measured phase current at a first moment and the measured phase current of the same phase at a previous moment and/or the difference between the measured sum of all phase currents at a first moment and the measured sum of all phase currents at a previous synchronous moment, c) analyzing the series of obtained current differences so as to generate a stall detection signal.