公开(公告)号：US20170126153A1

公开(公告)日：2017-05-04

申请号：US14930904

申请日：2015-11-03

Applicant: Freescale Semiconductor, Inc.

Inventor： Jaroslav Lepka ,  Libor Prokop

IPC: H02P6/12 ,  H02P29/02

CPC classification number: H02P6/12 ,  H02P6/18 ,  H02P29/021 ,  H02P29/024 ,  H02P29/0241

Abstract: A method and apparatus are provided for detecting a rotor lock condition in a sensorless permanent magnet synchronous motor. A BEMF observer determines an estimated rotor speed {circumflex over (ω)} and a first BEMF voltage value in an estimated rotor-related γ,δ reference frame. In addition, a second estimated BEMF voltage value is calculated in a rotor-related d,q reference frame based on at least a first motor constant and an estimated rotor speed {circumflex over (ω)}. After generating a BEMF error filter value from the first and second estimated BEMF voltage values and calculating a BEMF error threshold value as a function of the estimated rotor speed {circumflex over (ω)} that is subject to a minimum threshold BEMF value, a rotor lock condition is detected based on at least the BEMF error filter value and the BEMF error threshold value.

公开(公告)号：US10075107B2

公开(公告)日：2018-09-11

申请号：US14930904

申请日：2015-11-03

Applicant: Freescale Semiconductor, Inc.

Inventor： Jaroslav Lepka ,  Libor Prokop

IPC: H02P6/12 ,  H02P29/02 ,  H02P6/18 ,  H02P29/024

CPC classification number: H02P6/12 ,  H02P6/18 ,  H02P29/024 ,  H02P29/0241

Abstract: A method and apparatus are provided for detecting a rotor lock condition in a sensorless permanent magnet synchronous motor. A BEMF observer determines an estimated rotor speed {circumflex over (ω)} and a first BEMF voltage value in an estimated rotor-related γ,δ reference frame. In addition, a second estimated BEMF voltage value is calculated in a rotor-related d,q reference frame based on at least a first motor constant and an estimated rotor speed {circumflex over (ω)}. After generating a BEMF error filter value from the first and second estimated BEMF voltage values and calculating a BEMF error threshold value as a function of the estimated rotor speed {circumflex over (ω)} that is subject to a minimum threshold BEMF value, a rotor lock condition is detected based on at least the BEMF error filter value and the BEMF error threshold value.

公开(公告)号：US09496817B1

公开(公告)日：2016-11-15

申请号：US14745456

申请日：2015-06-21

Applicant: FREESCALE SEMICONDUCTOR, INC.

Inventor： Jaroslav Lepka ,  Libor Prokop

IPC: G05B5/00 ,  H02P29/00 ,  H02P29/02

CPC classification number: H02P29/60 ,  H02P29/64 ,  H02P29/67

Abstract: A method and apparatus for electric motor thermal management is provided. A thermal model allows estimation of temperatures of an electric motor and determination of a motor overload condition. The thermal model is based on electrical parameters that can be measured in a motor control circuit. An electric motor control method and circuit utilizes a back electromotive force (EMF) measurement circuit, a processor coupled to the back EMF measurement circuit for receiving a back EMF measurement and for calculating a thermal model of the electric motor, the thermal model based on a stator-to-ambient thermal resistance value accounting for a sum of a stator-to-case thermal resistance and a case-to-ambient thermal resistance, and an electric motor driver circuit coupled to the processor for providing drive signals for controlling delivery of power to the electric motor based on the thermal model of the electric motor.

Abstract translation: 提供了一种用于电动机热管理的方法和装置。 热模型允许估计电动机的温度和确定电动机过载状况。 热模型基于可以在电机控制电路中测量的电气参数。 电动机控制方法和电路利用反电动势（EMF）测量电路，耦合到反电动势测量电路的处理器用于接收反电动势测量并用于计算电动机的热模型，该热模型基于 定子至环境热阻值，其计算定子与壳体之间的热阻和环境热阻的总和，以及电动机驱动电路，其耦合到处理器，用于提供用于控制功率传递的驱动信号 基于电动机的热模型的电动机。