公开(公告)号：US09755422B2

公开(公告)日：2017-09-05

申请号：US14022835

申请日：2013-09-10

Applicant: Delta Electronics, Inc.

Inventor： Che-Hung Lin ,  Yueh-Lung Huang ,  Yen-Hung Chen

IPC: H02H3/20 ,  H02H7/09

CPC classification number: H02H7/09 ,  H02H3/207

Abstract: A power-protection apparatus is provided. The apparatus includes an over-voltage protection unit for generating an over-voltage detection signal when the power supply of the load is over the upper limit of a predetermined voltage range; an under-voltage protection unit for generating an under-voltage detection signal when the power supply of the load is under the lower limit of the predetermined voltage range; a working-state detection unit for receiving a control signal and generating a working-state detection signal when the level time-change rate of the control signal is over a time-change rate threshold; and a power-control unit coupled to the over-voltage protection unit, the working-state detection unit and the under-voltage protection unit for controlling the on and off of the power supply according to the over-voltage detection signal, the under-voltage detection signal or the working-state detection signal.

公开(公告)号：US09178516B1

公开(公告)日：2015-11-03

申请号：US14465238

申请日：2014-08-21

Applicant: DELTA ELECTRONICS, INC.

Inventor： Che-Hung Lin ,  Yueh-Lung Huang ,  Yen-Hung Chen

IPC: H03L5/00 ,  H03K19/0175

CPC classification number: H03K17/687 ,  H03K19/017509 ,  H03K2217/0063 ,  H03K2217/0081

Abstract: A voltage-level shift apparatus includes a first level shift unit, a second level shift unit, a charging unit, and a discharging unit. The first level shift unit receives a reference voltage and a power voltage to output a level-shifting voltage. The second level shift unit is connected to the first level shift unit and receives the level-shifting voltage. The charging unit receives a control voltage to provide an output voltage. The discharging unit is connected to the charging unit and receives the control voltage and the reference voltage. When the control voltage turns on the charging unit and turns off the discharging unit, the charging unit is charged by the level-shifting voltage. When the control voltage turns off the charging unit and turns on the discharging unit, the discharging unit is discharged from the output voltage.

Abstract translation: 电压电平移位装置包括第一电平移位单元，第二电平移位单元，充电单元和放电单元。 第一级移位单元接收参考电压和电源电压以输出电平移位电压。 第二电平移位单元连接到第一电平移位单元并接收电平移位电压。 充电单元接收控制电压以提供输出电压。 放电单元连接到充电单元并接收控制电压和参考电压。 当控制电压接通充电单元并关闭放电单元时，充电单元由电平移位电压充电。 当控制电压关闭充电单元并打开放电单元时，放电单元从输出电压放电。

公开(公告)号：US10041499B2

公开(公告)日：2018-08-07

申请号：US14942065

申请日：2015-11-16

Applicant: DELTA ELECTRONICS, INC.

Inventor： Kuo-Ying Lee ,  Yueh-Lung Huang ,  Yen-Hung Chen ,  Shih-Yuan Chiang ,  Feng-Ying Lin

IPC: F04D27/00 ,  H02P6/08

Abstract: A fan is provided. The fan includes a first power terminal, a second power terminal, a filter, a motor driver, a motor, a current sensor, and a controller. The filter includes an amplifying element, a resistor, and a capacitor, wherein a first terminal of the amplifying element is electrically connected to the first power terminal, a second terminal of the amplifying element is electrically connected to a first terminal of the resistor, and the capacitor is electrically connected between the second power terminal and a third terminal of the amplifying element. The motor is electrically connected to the third terminal of the amplifying element. The current sensor detects the current flowing through the motor and correspondingly generates a current sensing signal. The controller outputs a first control signal to the resistor according to the current sensing signal such that the amplifying element operating in an active region.

公开(公告)号：US09777738B2

公开(公告)日：2017-10-03

申请号：US14290496

申请日：2014-05-29

Applicant: DELTA ELECTRONICS, INC.

Inventor： Jung-Yuan Chen ,  Yen-Hung Chen ,  Ching-Sen Hsieh ,  Yueh-Hsin Liu ,  Chen-Chien Kao ,  Shih-Yuan Chiang ,  Jian-Cun Lin

IPC: F04D27/00 ,  F04D25/06

CPC classification number: F04D27/008 ,  F04D25/06 ,  F04D27/001 ,  F04D27/004

Abstract: An anti-air-return fan system includes a motor, a driving control circuit, and a rotation judgment circuit. The driving control circuit is electrically connected to the motor. The driving control circuit has a driving signal for driving the motor to rotate according to the driving signal. The rotation judgment circuit outputs a judgment signal to the driving control circuit when detecting that the motor reversely rotate. The driving control circuit executes a braking according to the judgment signal. The driving control circuit drives the motor to operate when the rotation judgment circuit detects that the motor doesn't rotate reversely.

公开(公告)号：US09571016B2

公开(公告)日：2017-02-14

申请号：US14330813

申请日：2014-07-14

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chia-Hao Chang ,  Yueh-Lung Huang ,  Yen-Hung Chen ,  Shih-Yuan Chiang ,  Feng-Ying Lin

IPC: H02P1/30 ,  H02P1/04 ,  H02P6/08 ,  H02P31/00

CPC classification number: H02P6/08 ,  H02P29/0241 ,  H02P31/00

Abstract: A motor control system is disclosed. The motor control system includes a level-shifting unit, a motor unit and a control unit. The level-shifting unit receives an original pulse width modulation (PWM) signal to generate an output PWM signal. When a first high level of the original PWM signal is larger than a first reference value, the level-shifting unit shifts a second high level of the output PWM signal to a set high level. When a first low level of the original PWM signal is lower than a second reference value, the level-shifting unit shifts a second low level of the output PWM signal to a set low level. The control unit controls the speed of the motor according to the output PWM signal.

Abstract translation: 公开了一种电动机控制系统。 电动机控制系统包括电平移动单元，电动机单元和控制单元。 电平移位单元接收原始脉宽调制（PWM）信号以产生输出PWM信号。 当原始PWM信号的第一高电平大于第一参考值时，电平移位单元将输出PWM信号的第二高电平移位到设定的高电平。 当原始PWM信号的第一低电平低于第二参考值时，电平移位单元将输出PWM信号的第二低电平移动到设定的低电平。 控制单元根据输出PWM信号控制电机的速度。

公开(公告)号：US09155226B2

公开(公告)日：2015-10-06

申请号：US13666635

申请日：2012-11-01

Applicant: DELTA ELECTRONICS, INC.

Inventor： Yueh-Lung Huang ,  Jung-Yuan Chen ,  Ching-Sen Hsieh ,  Chia-Lin Lee ,  Jian-Cun Lin ,  Yen-Hung Chen ,  Chia-Ming Hsu

IPC: H05K7/20 ,  F04D25/10

CPC classification number: H05K7/20209 ,  F04D25/10

Abstract: A fan control method includes the steps of: acquiring a control factor; determining whether the control factor is located in a first range or a second range; executing a first dust removing mode if the control factor is located in the first range; executing a second dust removing mode if the control factor is located in the second range; and executing a normal mode if the control factor is not located in the first range and the second range.

Abstract translation: 风扇控制方法包括以下步骤：获取控制因子; 确定所述控制因子是否位于第一范围或第二范围内; 如果控制因素位于第一范围内，则执行第一除尘模式; 如果控制因素位于第二范围内则执行第二除尘模式; 并且如果所述控制因素不位于所述第一范围和所述第二范围内，则执行正常模式。