会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Power inverter with overload protection apparatus
    • 电力变频器带过载保护装置
    • US4527214A
    • 1985-07-02
    • US481150
    • 1983-04-01
    • Motonobu HattoriAkira IshibashiHiromi IshidaKenji Nandoh
    • Motonobu HattoriAkira IshibashiHiromi IshidaKenji Nandoh
    • H02H7/085H02H3/093H02H7/08H02M1/36H02M5/45H02H7/122H02H5/04
    • H02M1/36H02H3/0935H02M5/4505
    • A power inverter including a converter unit for rectifying AC power into DC power, an inverter for inverting the DC power into AC power for driving a load apparatus, and a protection apparatus for protecting the load apparatus from being overloaded. The load protecting apparatus comprises current detecting means for detecting a current supplied to the inverter unit from the converter unit, a memory for storing a thermally limited operation time characteristic determined in consideration of cooling effect proper to the load apparatus, and an abnormality detecting circuit for producing an abnormality signal to stop the operation of the inverter unit when an accumulated value calculated on the basis of the current value detected by the current detector at a predetermined sampling interval exceeds the characteristic value previously stored in the memory. The load apparatus can be positively protected from overload notwithstanding variations in the output voltage and the output frequency of the power inverter.
    • 一种电力逆变器,包括用于将交流电转换成直流电力的转换器单元,用于将直流电转换成用于驱动负载装置的交流电力的逆变器,以及用于保护负载装置不被过载的保护装置。 负载保护装置包括电流检测装置,用于检测从转换器单元提供给逆变器单元的电流;存储器,用于存储考虑到适用于负载装置的冷却效果确定的热限制运行时间特性;以及异常检测电路, 产生异常信号以在基于由电流检测器检测的当前值以预定采样间隔计算的累加值超过预先存储在存储器中的特征值时停止逆变器单元的操作。 尽管输出电压和功率逆变器的输出频率有变化,负载装置也可以得到积极的保护,避免过载。
    • 5. 发明授权
    • Control system for PWM inverter
    • PWM逆变器控制系统
    • US4767976A
    • 1988-08-30
    • US37853
    • 1987-04-13
    • Nobuyoshi MutohAkiteru UedaMotonobu HattoriSatoshi IboriHideyuki ShimonabeKenji Nandoh
    • Nobuyoshi MutohAkiteru UedaMotonobu HattoriSatoshi IboriHideyuki ShimonabeKenji Nandoh
    • H02P27/06H02P21/08H02P27/04H02P27/08H02P5/40
    • H02P27/08H02P27/047
    • A control system for controlling a PWM inverter so that the inverter drives an induction motor at a variable voltage and a variable frequency while keeping constant a ratio of the output voltage of the inverter to the output frequency thereof, is disclosed which includes current component detecting means for detecting an effective current corresponding to a load, from the input current of the induction motor, frequency setting means for setting the output frequency of the PWM inverter, flux setting means for setting the amount of magnetic flux generated in the induction motor, correcting-frequency calculating means for calculating a frequency correcting quantity proportional to the effective current, and correcting-flux calculating means for calculating a flux correcting quantity proportional to the effective current. In a case where the detected effective current is judged to be less than a predetermined value, the frequency correcting quantity is added to the set output frequency to obtain an output frequency command, and the sum of the flux correcting quantity and the set amount of magnetic flux is multiplied by the value of the output frequency command to obtain an output voltage command, for the purpose of controlling the operation of the PWM inverter on the basis of the output frequency command and the output voltage command.
    • 一种用于控制PWM逆变器的控制系统,使得逆变器以可变电压和可变频率驱动感应电动机,同时保持变频器的输出电压与其输出频率的比例恒定,其包括电流分量检测装置 用于从感应电动机的输入电流检测与负载相对应的有效电流;频率设定装置,用于设定PWM逆变器的输出频率;磁通设定装置,用于设定感应电动机中产生的磁通量, 频率计算装置,用于计算与有效电流成比例的频率校正量;以及校正磁通计算装置,用于计算与有效电流成比例的磁通校正量。 在检测到的有效电流被判断为小于预定值的情况下,将频率校正量与设定的输出频率相加,得到输出频率指令,并且磁通校正量与设定的磁场量之和 为了根据输出频率指令和输出电压指令来控制PWM逆变器的运行,磁通量乘以输出频率指令的值以获得输出电压指令。
    • 8. 发明授权
    • Inverter apparatus having operation specifications determined by type of
I/O block which is connected to basic control unit
    • 具有由连接到基本控制单元的I / O块的类型确定的操作规格的变频装置
    • US6058036A
    • 2000-05-02
    • US988906
    • 1997-12-11
    • Tsunehiro EndoSeiji IshidaKenji NandohTadao ShimotsuHiroyuki Benya
    • Tsunehiro EndoSeiji IshidaKenji NandohTadao ShimotsuHiroyuki Benya
    • H02M7/04H02M7/12H02M7/48H02P27/06H02M3/24
    • H02M7/53875
    • An inverter apparatus includes a basic control section including a main circuit which includes an inverter, and a control unit which controls the main circuit. The inverter apparatus also includes an I/O block which is connected to the basic control section, and is selected from a plurality of different types of I/O blocks. The I/O block includes an input/output interface. The input/output interface includes a signal connection terminal which transmits an input/output signal to/from the control unit. Operation management specifications of the main circuit are fixed independently of operation management specifications of the input/output interface. Operation specifications of the inverter apparatus change depending on the operation management specifications of the input/output interface, and are determined by the type of the I/O block which is connected to the basic control section, such that connecting the different types of I/O blocks to the basic control section causes the inverter apparatus to have different operation specifications.
    • 逆变器装置包括基本控制部分,其包括包括逆变器的主电路和控制主电路的控制单元。 逆变器装置还包括连接到基本控制部分的I / O块,并且从多个不同类型的I / O块中选择。 I / O块包括一个输入/输出接口。 该输入/输出接口包括一个信号连接端子,该信号连接端子向/从该控制单元发送一个输入/输出信号。 主电路的运行管理规范是独立于输入/输出接口的操作管理规范进行固定的。 逆变器装置的动作规格根据输入输出接口的动作管理规格而变化,由与基本控制部连接的I / O块的种类决定,从而将不同种类的I / O块到基本控制部分使变频器设备具有不同的操作规格。