公开(公告)号：US09479096B2

公开(公告)日：2016-10-25

申请号：US14531224

申请日：2014-11-03

Applicant: Melexis Technologies NV

Inventor： Jan Heynlein ,  Thomas Freitag ,  Christian Paintz

IPC: H02P1/00 ,  H02P6/18

CPC classification number: H02P6/18 ,  H02P6/182

Abstract: A method is provided for determining a phase current direction and a zero-crossing moment of the phase current in a sinusoidally controlled brushless direct current motor. The brushless direct current motor comprises a coil per phase and the phase of the brushless direct current motor is driven by a half bridge driver. The half bridge driver comprises a high side field effect transistor and a low side field effect transistor. The method comprising the following steps: measuring the drain source voltage over the high side field effect transistor and low side field effect transistor, and determining the zero crossing moment of the phase current by determining the current direction based on the measured drain source voltages and by determining the moment the current changes direction.

Abstract translation: 提供一种用于确定正弦控制的无刷直流电动机中的相电流方向和相电流的零交叉力矩的方法。 无刷直流电动机每相包括线圈，无刷直流电动机的相位由半桥驱动器驱动。 半桥驱动器包括高边场效应晶体管和低边场效应晶体管。 该方法包括以下步骤：测量高侧场效应晶体管和低侧场效应晶体管上的漏极电压，并且通过基于测量的漏极源电压和通过测量的漏极源电压确定电流方向来确定相电流的过零点 确定当前改变方向的时刻。