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
    • 82. 发明申请
    • AQUARIUM HAVING IMPROVED FILTRATION SYSTEM
    • WO2005034614A3
    • 2005-04-21
    • PCT/US2004/033441
    • 2004-10-08
    • MAG LIFE, LLCALLIS, Anthony, J.
    • ALLIS, Anthony, J.
    • A01K61/00
    • An aquarium which includes a tank having a pump and an under gravel filter disposed in the tank below the pump. The under gravel filter includes a hollow bubble dispersing base plate having a perforated top surface and an overlying substrate. An air conduit is provided for introducing air into the pump. The pump is connected to the plate such as to pump blended oxygenated water and air into the interior of the plate to thereby cause oxygenated water and bubbles to exit upwardly through the perforated top surface of the plate and into and through the substrate. The pump includes a free floating magnetic impeller. A rotational torque generating unit is provided to rotate the impeller. The rotational torque generating unit includes a magnetic drive disk and a motor for rotating the magnetic drive disk. The pump and rotational torque generating unit are aligned with each other such that a magnetic field is established between the magnetic drive disk and the magnetic impeller, the magnetic field rotating upon rotation of the magnetic drive disk to thereby rotate the impeller.
    • 85. 发明申请
    • AUDIBLE NOISE REDUCTION FOR SINGLE CURRENT SHUNT PLATFORM
    • 用于单流电平平台的可听噪声减少
    • WO2008115579A1
    • 2008-09-25
    • PCT/US2008/003748
    • 2008-03-20
    • INTERNATIONAL RECTIFIER CORPORATIONHO, Eddy Ying Yin
    • HO, Eddy Ying Yin
    • H02K33/00
    • H02P29/50H02M2001/0009
    • A method for reducing Audible noise in a motor drive, wherein the motor drive includes a motor controller driving a PWM space vector modulator providing gating pulses to an inverter providing phase currents to the phase windings of the motor, and wherein phase currents of the motor are determined by taking samples of the DC link current in a DC link powering the inverter. The method comprises determining the speed of the motor and comparing the speed to a preset threshold, the preset threshold defining a speed at which audible noise is generated by the motor due to a minimum pulse constraint being imposed on the motor phase currents in order to reliably sample the DC link current to measure the phase current. If the speed is below the threshold, the DC link current in the DC link is sampled using a reduced number of current samples for a PWM cycle of the PWM space vector modulator to reduce audible motor noise.
    • 一种用于降低电动机驱动器中的声音噪声的方法,其中所述电动机驱动器包括驱动PWM空间矢量调制器的电动机控制器,所述PWM空间矢量调制器向向所述电动机的相绕组提供相电流的逆变器提供门控脉冲,并且其中所述电动机的相电流为 通过在逆变器供电的DC链路中获取直流链路电流的样本来确定。 该方法包括确定电动机的速度并将速度与预设阈值进行比较,该预设阈值限定由于施加在电动机相电流上的最小脉冲约束而由电动机产生可听见噪声的速度,以便可靠地 对直流链路电流进行采样以测量相电流。 如果速度低于阈值,则使用PWM空间矢量调制器的PWM周期的减少数量的当前采样来对DC链路中的DC链路电流进行采样,以减少可听见的电机噪声。