Electrical circuit for a centrifuge
    12.
    发明授权
    Electrical circuit for a centrifuge 失效
    用于离心的电路

    公开(公告)号:US5086265A

    公开(公告)日:1992-02-04

    申请号:US696034

    申请日:1991-05-06

    CPC classification number: H02P25/04 H02P2201/05

    Abstract: To control the speed of an alternating-current drive capacitor motor of a centrifuge, the motor is connected to the bridge arm of a single-phase inverter. The bridge arm is connected at each of its ends to the midpoints of a series circuit of two capacitors and two field-effect transistors, these series circuits being connected in parallel with one another and connected to the output of a rectifier operated by the a.c. voltage supply. During operation, the capacitors are discharged by means of triggering the field-effect transistors alternately via the capacitor motor, the triggering being performed via a microprocessor serving as a pulse generator.

    Abstract translation: 为了控制离心机的交流驱动电容器电机的速度,电机连接到单相逆变器的桥臂。 桥臂在其各端连接到两个电容器和两个场效应晶体管的串联电路的中点,这些串联电路彼此并联连接,并连接到由交流电源操作的整流器的输出。 电压供应 在操作期间,电容器通过经由电容器电动机交替地触发场效应晶体管而放电,触发通过作为脉冲发生器的微处理器执行。

    Power circuit with high input power factor and a regulated output
    13.
    发明授权
    Power circuit with high input power factor and a regulated output 失效
    具有高输入功率因数和稳压输出的电源电路

    公开(公告)号:US4642745A

    公开(公告)日:1987-02-10

    申请号:US835708

    申请日:1986-03-03

    Abstract: A single power converter is capable of drawing low distortion current from an AC line and delivering DC or AC power to a load. The single power converter is used to independently control the input current and the output current. The power converter transformer has an output winding which is controlled by pulse-width modulation (PWM) and a frequency controlled boost winding for controlling input current.

    Abstract translation: 单个功率转换器能够从AC线路中获取低失真电流,并将DC或AC电力传送到负载。 单电源转换器用于独立控制输入电流和输出电流。 电源转换器变压器具有通过脉宽调制(PWM)控制的输出绕组和用于控制输入电流的频率控制升压绕组。

    Compact electrical power supply for signal processing applications
    14.
    发明授权
    Compact electrical power supply for signal processing applications 失效
    用于信号处理应用的紧凑型电源

    公开(公告)号:US4533986A

    公开(公告)日:1985-08-06

    申请号:US547376

    申请日:1983-10-31

    Inventor: Dwight V. Jones

    Abstract: The present invention relates to a compact electrical power supply which derives electrical energy from a low frequency medium voltage source (e.g. a 120 V 60 Hz ac main), and converts the electrical energy to a low voltage format suitable for solid state signal processing equipment. The supply entails in succession bridge rectification means, a dc-dc boost converter, a capacitor storage bank, and a half bridge converter, either resonantly or non-resonantly operated. The converters operate at frequencies substantially above audible frequencies in the interests of compactness. The design provides a high input power factor (inductive) with minimum EMT, and provides a lengthened voltage hold up after loss of power.

    Abstract translation: 本发明涉及一种从低频中压电源(例如120V 60Hz交流主电源)获得电能并将电能转换成适合于固态信号处理设备的低电压格式的紧凑型电源。 供应需要串联整流装置,直流 - 直流升压转换器,电容器存储体和半桥转换器,可以共振或非共振操作。 为了紧凑性,转换器以大致高于可听频率的频率工作。 该设计提供了具有最小EMT的高输入功率因数(电感),并且在断电后提供延长的电压保持。

    Resonant motor system
    16.
    发明授权
    Resonant motor system 失效
    谐振电机系统

    公开(公告)号:US06847186B1

    公开(公告)日:2005-01-25

    申请号:US10274420

    申请日:2002-10-18

    Applicant: Jack H. Kerlin

    Inventor: Jack H. Kerlin

    CPC classification number: H02P25/16 H02K11/0094 H02K99/20 H02P2201/05

    Abstract: In a resonant motor system, an electrical motor having a stator with one or more windings, a rotor which may or may not be wound, and an air gap between the stator and the rotor for storing magnetic energy such that the motor exhibits a definite electrical inductance may be deployed with a drive combination including a capacitance connected in series with the inductance of the motor to form an LCR circuit therewith. Phased provision of DC power to the LCR circuit causes the circuit to oscillate, which excites the motor. The DC power is provided in synchronism with the rotation of the rotor in order to maximize torque produced by the motor.

    Abstract translation: 在谐振电动机系统中,具有具有一个或多个绕组的定子的电动机,可以被卷绕的转子或可以不被卷绕的转子以及用于存储磁能的定子和转子之间的气隙,使得电动机呈现一定的电气 电感可以用包括与电动机的电感串联的电容的驱动组合来部署,以与其形成LCR电路。 向LCR电路分阶段提供直流电源会导致电路振荡,从而激励电机。 直流电源与转子的旋转同步地提供,以便最大化由电动机产生的转矩。

    Inverter device for stable, high power-factor input current supply
    17.
    发明授权
    Inverter device for stable, high power-factor input current supply 失效
    变频器用于稳定,高功率因数输入电流供应

    公开(公告)号:US5459651A

    公开(公告)日:1995-10-17

    申请号:US246263

    申请日:1994-05-19

    Applicant: Minoru Maehara

    Inventor: Minoru Maehara

    Abstract: An inverter device for supplying a stable, high power-factor input current while restraining higher harmonics to be low is provided by a simple circuit structure in which a pulsating DC voltage supplied through a power circuit is provided to a smoothing condenser, a direct current is provided from the smoothing condenser to an inverter circuit section, and an input current path is formed from the power circuit through an impedance element to a switching element of the inverter circuit section and to part of an oscillation circuit.

    Abstract translation: 通过简单的电路结构提供稳定的高功率因数输入电流同时抑制高次谐波的逆变器装置,其中通过电源电路提供的脉动直流电压被提供给平滑电容器,直流电流为 从平滑电容器提供给逆变器电路部分,并且从功率电路通过阻抗元件向逆变器电路部分的开关元件和振荡电路的一部分形成输入电流路径。

    Power supply unit for arc processing
    18.
    发明授权
    Power supply unit for arc processing 失效
    电弧加工用电源单元

    公开(公告)号:US5200887A

    公开(公告)日:1993-04-06

    申请号:US784564

    申请日:1991-10-29

    CPC classification number: H02M1/10 H02M5/458 H02P2201/05

    Abstract: A power supply for arc processing which can be used with a commercial AC power supplying either a high or low voltage, with the low and high voltages having a ratio of 1:2. The power supply includes two or three rectifying circuits connected in parallel, each of which comprises three series diodes, with a first series connection point of each series connected diodes being connected to one of the input terminals (phases) of the commercial power supply. The power supply further includes two or three voltage change over circuits, comprising a capacitor and a voltae change-over switch, closed at a low voltage input, connected between a second connection point of its corresponding rectifying circuit and the first connection point of another rectifying circuit. An inverter circuit for inverse conversion is connected in parallel between the terminals of the three rectifying circuits.

    Abstract translation: 用于电弧处理的电源,其可以与提供高电压或低电压的商用AC电力一起使用,低电压和高电压具有1:2的比率。 电源包括并联连接的两个或三个整流电路,每个整流电路包括三个串联二极管,每个串联的二极管的第一串联连接点连接到商用电源的一个输入端(相)。 电源还包括两个或三个电压转换电路,包括电容器和电压转换开关,其在低电压输入端闭合,连接在其对应的整流电路的第二连接点与另一个整流电路的第一连接点 电路。 用于逆变换的逆变器电路并联连接在三个整流电路的端子之间。

    Converters
    19.
    发明授权
    Converters 失效
    转换器

    公开(公告)号:US4333134A

    公开(公告)日:1982-06-01

    申请号:US124078

    申请日:1980-02-25

    Applicant: David Gurwicz

    Inventor: David Gurwicz

    CPC classification number: H02M3/3376 H02M5/458 H02P2201/05

    Abstract: A high frequency converter of push-pull form comprises a center tapped D.C. input supply 16, 17, 18, two solid state switching devices (20, 21) connected in series across the D.C. input terminals, a load circuit including a supersonic frequency transformer 30 and an output rectifier 35, and an oscillatory circuit including at least one capacitor 40 and a parallel inductor 34 connected in parallel with the primary winding 37 of the transformer between the center tapping 19 of the supply and the junction 25 of the switching devices. The switching devices are synchronized to the oscillation of the oscillatory circuit to allow the circuit to oscillate freely for part of a cycle to transfer energy from the inductor 34 to the capacitor 40 to charge the latter to a certain condition in which the voltage across the parallel inductor is substantial and that across the switching device is negligible and only then connect the parallel inductor across the D.C. input terminals whereupon the parallel inductor receives and stores energy from the said supply. Means such as a saturable reactor 33 are connected in series in the load circuit to restrict load current to a low value during a part of the cycle in which the capacitor receives energy from the parallel inductor and until the capacitor is charged to the said condition and the switching means has connected the load circuit across the supply.

    Abstract translation: 一种推挽式高频变换器包括一个中心抽头直流输入电源16,17,18,串联连接在直流输入端子上的两个固态开关器件(20,21),负载电路包括超音频变压器30 输出整流器35以及包括至少一个电容器40和并联电感器34的振荡电路,该电容器40和并联电感器34与变压器的初级绕组37并联连接在电源的中心抽头19和开关器件的接点25之间。 开关器件与振荡电路的振荡同步,以允许电路自由地摆动一部分周期,以将能量从电感器34传递到电容器40,以将电荷充电到一定的条件,其中跨并联的电压 电感器是实质的,并且跨开关器件是可忽略的,并且仅在并联电感器之间连接直流输入端子,于是并联电感器接收并存储来自所述电源的能量。 诸如可饱和电抗器33的装置在负载电路中串联连接,以在电容器从并联电感器接收能量并且直到电容器被充电到所述状态的周期的一部分期间将负载电流限制到低值, 开关装置将负载电路连接在电源上。

Patent Agency Ranking