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公开(公告)号：US20150303850A1
公开(公告)日：2015-10-22
申请号：US14689507
申请日：2015-04-17
Applicant: Texas Instruments Incorporated
Inventor： Sudhir NAGARAJ , Anuj JAIN
Abstract: A motor controller that includes a processing device and a drive circuit. The drive circuit may include a plurality of switches, a motor winding, and a current sensor coupled together in an H-bridge configuration. The processing device is configured to cause a drive current to drive through the motor winding for a minimum amount of time. The processing device is also configured to compare the current through the current sensor to a threshold value at the minimum amount of time. The processing device is also configured to, based on the current being at or above the threshold value at the minimum amount of time, stop the drive current for an off period of time and cause a first decay of the current for a first percentage of the off period of time and a first slow decay for a second percentage of the off period of time.
Abstract translation: 一种电动机控制器，包括处理装置和驱动电路。 驱动电路可以包括以H桥配置耦合在一起的多个开关，电动机绕组和电流传感器。 处理装置被配置为使得驱动电流以最小的时间量驱动通过电动机绕组。 处理装置还被配置为在最小时间内将通过电流传感器的电流与阈值进行比较。 处理装置还被配置为基于在最小时间量处于等于或高于阈值的电流，停止驱动电流关闭时间段，并导致电流的第一衰减为第一百分比 关闭时间段，第一个缓慢衰减为第二个百分比的关闭时间段。
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公开(公告)号：US20180269869A1
公开(公告)日：2018-09-20
申请号：US15714643
申请日：2017-09-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajarshi MUKHOPADHYAY , Sooping SAW , Anuj JAIN
CPC classification number: H03K17/162 , H02M1/08 , H02M1/44 , H02M7/5387 , H02M2001/0029 , H02M2001/0054 , H02P6/085 , H02P6/14 , H03K17/166 , H03K2217/0045 , H03K2217/0063 , H03K2217/0072
Abstract: Modulating a gate drive current supplied to an output drive switch coupled to an electric motor by performing at least the following: obtain a gate drive current modulation profile, supply, based on the gate drive current modulation profile, a first gate drive current level as the gate drive current when the output drive switch is operating within a first region, drop the first gate drive current level to a second gate drive current level when the output drive switch transitions from the first region to operating within a Miller region, increase the second gate drive current level to a third gate drive current level within the Miller region, and set the gate drive current to a fourth gate drive current level when the output drive switch transitions from the Miller region to operating within a third region.
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公开(公告)号：US20200177179A1
公开(公告)日：2020-06-04
申请号：US16205576
申请日：2018-11-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Michael Edwin BUTENHOFF , Rakesh RAJA , Anuj JAIN
IPC: H03K17/687
Abstract: A transistor, e.g., field effect transistor FET, ringing adjustment circuit and method comprising the measuring of a voltage from a transistor (e.g., a node of a FET) during the transistor turning on and turning off, determining the voltage oscillation in the measured voltage by performing a derivative function on the measured voltage and detecting a switch in a voltage change rate from positive to negative or negative to positive, and comparing the voltage change rate after the detected switch to adjust drive current applied to the transistor to optimize efficiency while minimizing voltage oscillation and ringing.
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公开(公告)号：US20190326902A1
公开(公告)日：2019-10-24
申请号：US16459814
申请日：2019-07-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajarshi MUKHOPADHYAY , Sooping SAW , Anuj JAIN
Abstract: Modulating a gate drive current supplied to an output drive switch coupled to an electric motor by performing at least the following: obtain a gate drive current modulation profile, supply, based on the gate drive current modulation profile, a first gate drive current level as the gate drive current when the output drive switch is operating within a first region, drop the first gate drive current level to a second gate drive current level when the output drive switch transitions from the first region to operating within a Miller region, increase the second gate drive current level to a third gate drive current level within the Miller region, and set the gate drive current to a fourth gate drive current level when the output drive switch transitions from the Miller region to operating within a third region.
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