-
公开(公告)号：US20180269506A1
公开(公告)日：2018-09-20
申请号：US15821458
申请日：2017-11-22
发明人： Chang Seok You , Min Su Kang , Sung Do Kim , Dong Hun Lee
IPC分类号： H01M8/04992 , H02P23/02 , H01M8/04313
CPC分类号： H01M8/04992 , B60L1/003 , B60L58/30 , H01M8/04313 , H01M8/04395 , H01M8/04947 , H02P23/02
摘要： An air supply control method and system for a fuel cell controlling a switching frequency of an inverter at which power consumption of the air compressor becomes minimal includes: calculating a revolution per minute (RPM) of a motor of an air compressor; calculating a switching frequency of an inverter of the motor of the air compressor at which power consumption becomes minimal based on the calculated RPM of the motor; and controlling the inverter with the calculated switching frequency.
-
公开(公告)号：US20170346433A1
公开(公告)日：2017-11-30
申请号：US15605161
申请日：2017-05-25
发明人： Ali Bazzi , Artur Ulatowski , Yiqi Liu
CPC分类号： H02P23/0022 , H02P23/0004 , H02P23/02 , H02P27/047
摘要： Methods and systems of optimizing efficiency of a motor drive or generator are provided. The methods include measuring data corresponding to input power and output power of a motor drive or generator at a control parameter and different load values. The methods include generating a three-dimensional surface model based on the measured data. The three-dimensional surface model can estimate an efficiency of the motor drive or generator at the control parameter and at unmeasured load values. The methods can include determining optimal efficiency of the motor drive or generator at the different load values and the unmeasured load values based on the three-dimensional surface model.
-
公开(公告)号：US09673743B1
公开(公告)日：2017-06-06
申请号：US15429076
申请日：2017-02-09
摘要： An power management unit receives AC power and, via an AC-DC-AC converter, provides an AC motor signal to a three-phase induction motor. Sensors in the power management unit provide data to a digital signal processor (“DSP”). The data includes a current of the AC motor signal. The DSP generates a PWM carrier signal to modulate a voltage amplitude of the AC motor signal, thereby improving the operating efficiency of the motor. The motor terminal voltage is reduced until limit conditions are reached, such as reaching a motor rated efficiency or when the motor current fluctuates.
-
公开(公告)号：US09667187B2
公开(公告)日：2017-05-30
申请号：US14374242
申请日：2013-01-30
摘要： A motor control apparatus includes a secondary-magnetic-flux-command calculating unit including a minimum-current-secondary-magnetic-flux-command calculating unit that calculates a secondary magnetic flux command for minimizing a current root-mean-square value due to a torque current and an excitation current and a PWM-signal generating unit that generates a torque current command for outputting a desired torque command and an excitation current command for outputting the secondary magnetic flux command, performs vector control such that a q-axis current, which is a detection value of the torque current, and a d-axis current, which is a detection value of the excitation current, respectively coincide with the torque current command and the excitation current command, and generates control signals for turning on and off a switching element in an inverter.
-
公开(公告)号：US20170077857A1
公开(公告)日：2017-03-16
申请号：US14854757
申请日：2015-09-15
摘要： Hybrid motor drive circuits configured to drive a motor are provided herein. A hybrid motor drive circuit includes an inverter coupled to the motor and configured to drive the motor when a motor commanded frequency is not within a predetermined range of line input power frequencies. The hybrid motor drive circuit also includes a first switch device configured to couple line input power to an output of the inverter when the motor commanded frequency is within the predetermined range of line input power frequencies.
摘要翻译： 这里提供了构造成驱动电动机的混合电动机驱动电路。 混合电动机驱动电路包括耦合到电动机并且被配置为当电动机指令频率不在线路输入功率频率的预定范围内时驱动电动机的逆变器。 混合电动机驱动电路还包括第一开关装置，其被配置为当电机指令频率在线路输入功率频率的预定范围内时将线路输入功率耦合到逆变器的输出。
-
公开(公告)号：US09148083B2
公开(公告)日：2015-09-29
申请号：US13551973
申请日：2012-07-18
申请人： Eric Jon Olsson , Bin Lu , Ting Yan , Steven John Fredette , Charles John Luebke
发明人： Eric Jon Olsson , Bin Lu , Ting Yan , Steven John Fredette , Charles John Luebke
CPC分类号： H02P23/02 , H02P23/0077 , H02P23/14 , H02P27/047
摘要： A system and method for controlling an AC motor drive includes a control system programmed with an algorithm configured to optimize operation of the motor drive. Specifically, the control system is programmed to input an initial voltage-frequency command to the drive. The initial voltage-frequency command includes a voltage reference and a frequency reference corresponding to an operating point of an initial voltage/frequency (V/Hz) curve. The control system monitors a real-time output of the drive, modifies the voltage reference based on the real-time output of the drive, and transmits a modified voltage-frequency command to the drive. The modified voltage-frequency command corresponds to an operating point of a modified V/Hz curve defined by the modified voltage reference and the initial V/Hz curve.
摘要翻译： 用于控制AC电动机驱动器的系统和方法包括用配置成优化电动机驱动器的操作的算法来编程的控制系统。 具体地，控制系统被编程为向驱动器输入初始电压 - 频率命令。 初始电压 - 频率指令包括对应于初始电压/频率（V / Hz）曲线的工作点的电压基准和频率基准。 控制系统监控驱动器的实时输出，根据驱动器的实时输出修改参考电压，并向驱动器发送修改的电压 - 频率指令。 修改的电压 - 频率指令对应于由修改的电压基准和初始V / Hz曲线定义的修改的V / Hz曲线的工作点。
-
7.发明申请公开(公告)号：US20130300338A1
公开(公告)日：2013-11-14
申请号：US13943929
申请日：2013-07-17
IPC分类号： H02P1/42
CPC分类号： H02P1/029 , G05B19/042 , H02H7/09 , H02H11/006 , H02P1/028 , H02P1/42 , H02P1/426 , H02P23/02 , H02P23/08 , H02P23/26
摘要： A device for improving efficiency of an induction motor soft-starts the motor by applying a power to the motor that is substantially less than the rated power of the motor then gradually increasing the power while monitoring changes in current drawn by the motor, thereby detecting when maximum efficiency is found. Once maximum efficiency is found, the nominal motor current is found and operating ranges are set. Now, the phase angle between the voltage and the current to the motor is measured and power to the motor is increasing when the phase angle is less than a minimum phase angle (determined during soft-start) and power to the motor is decreased when the phase angle is greater than or equal to the minimum phase angle as long as the voltage does not fall below a minimum voltage determined during soft-start.
摘要翻译： 用于提高感应电动机的效率的装置通过向电动机施加电力而启动电动机，所述电动机基本上小于电动机的额定功率，然后逐渐增加功率，同时监测由电动机吸取的电流的变化，从而检测何时 发现最大的效率。 一旦找到最大效率，就会找到电机额定电流，并设置工作范围。 现在，当相位角小于最小相位角（在软启动期间确定）时，测量到电动机的电压和电流之间的相位角，并且当电动机的功率减小时，电动机的功率增加 只要电压不低于在软启动期间确定的最小电压，相位角大于或等于最小相位角。
-
公开(公告)号：US20120280645A1
公开(公告)日：2012-11-08
申请号：US13551973
申请日：2012-07-18
申请人： Eric Jon Olsson , Bin Lu , Ting Yan , Steven John Fredette , Charles John Luebke
发明人： Eric Jon Olsson , Bin Lu , Ting Yan , Steven John Fredette , Charles John Luebke
IPC分类号： H02P27/04
CPC分类号： H02P23/02 , H02P23/0077 , H02P23/14 , H02P27/047
摘要： A system and method for controlling an AC motor drive includes a control system programmed with an algorithm configured to optimize operation of the motor drive. Specifically, the control system is programmed to input an initial voltage-frequency command to the drive. The initial voltage-frequency command includes a voltage reference and a frequency reference corresponding to an operating point of an initial voltage/frequency (V/Hz) curve. The control system monitors a real-time output of the drive, modifies the voltage reference based on the real-time output of the drive, and transmits a modified voltage-frequency command to the drive. The modified voltage-frequency command corresponds to an operating point of a modified V/Hz curve defined by the modified voltage reference and the initial V/Hz curve.
摘要翻译： 用于控制AC电动机驱动器的系统和方法包括用配置成优化电动机驱动器的操作的算法来编程的控制系统。 具体地，控制系统被编程为向驱动器输入初始电压 - 频率命令。 初始电压 - 频率指令包括对应于初始电压/频率（V / Hz）曲线的工作点的电压基准和频率基准。 控制系统监控驱动器的实时输出，根据驱动器的实时输出修改参考电压，并向驱动器发送修改的电压 - 频率指令。 修改的电压 - 频率指令对应于由修改的电压基准和初始V / Hz曲线定义的修改的V / Hz曲线的工作点。
-
公开(公告)号：US08111030B2
公开(公告)日：2012-02-07
申请号：US12241982
申请日：2008-09-30
申请人： Chun-Lung Chiu , Ming-Shi Tsai , Po-Tsun Kuo , Chung-Hung Tang
发明人： Chun-Lung Chiu , Ming-Shi Tsai , Po-Tsun Kuo , Chung-Hung Tang
IPC分类号： G05B11/28
CPC分类号： H02P23/02
摘要： A motor control apparatus and a motor control method determine whether the motor is in a back-pressure area so as to provide different rotation-speed control signals. When the fan is in the low duty cycle, a first circuit loop is switched on, so that the fan has more accurate rotation speed. When the fan is in the high duty cycle, a second circuit loop is switched on, so that the rotation speed of fan does not be limited to a constant rotation-speed as the fan enters the back-pressure area. Thus, the fan has larger airflow quantity and higher airflow pressure.
摘要翻译： 马达控制装置和马达控制方法确定马达是否处于背压区域以提供不同的转速控制信号。 当风扇处于低占空比时，第一个电路回路接通，使风扇转速更准确。 当风扇处于高占空比时，第二回路回路接通，风扇进入背压区域时风扇的转速不会受到恒定的转速的限制。 因此，风扇具有较大的气流量和较高的气流压力。
-
公开(公告)号：US09825572B2
公开(公告)日：2017-11-21
申请号：US15008841
申请日：2016-01-28
申请人： MAKITA CORPORATION
发明人： Katsuhito Fujinami , Kazuki Iyota
摘要： An electric working machine according to one aspect of the present disclosure includes a motor, a current detector, a voltage detector, and a load state determination unit. The current detector is configured to detect a current flowing through the motor during drive of the motor. The voltage detector is configured to detect an input voltage supplied to the motor during drive of the motor. The load state determination unit is configured to determine whether the motor is in a no-load operation state based on the detected current, the detected input voltage and an output voltage from an electric power source.
-
-
-
-
-
-
-
-
-
搜索结果
54 条记录 (耗时 0.015 秒)
