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    • 1. 发明授权
    • Energy controller for conversion from a direct current source to a
variable frequency load
    • 用于从直流电源转换为可变频率负载的能量控制器
    • US4277736A
    • 1981-07-07
    • US98980
    • 1979-11-30
    • Jay Boyce
    • Jay Boyce
    • H02P23/06H02P7/42H02P7/64
    • H02P23/07
    • A turn off circuit for a multiphase motor is provided, comprising a D.C. powered system including a three element choke core having two outer cores with loosely coupled windings and a central core closely coupled to the outer cores to enhance pulse generation.A modified SCR ring counter is provided to supply D.C. power to the load to produce a three phase wave shape with less wave distortion and lower noise.Pulse width modulation is supplied to the negative SCRs of the ring counter through steering SCRs which are turned on by discharge from capacitors in the steering circuit.Pulse width modulation is fed to the ring counter through the outer core elements, while the central core functions to improve pulse width of the discharge capacitors. Free wheeling energy from the motor is fed to the discharge capacitors and increases firing energy.
    • 提供了一种用于多相电动机的关断电路,其包括直流电动系统,其包括具有松耦合绕组的两个外芯的三元件扼流圈和紧密耦合到外芯的中心芯,以增强脉冲产生。 提供改进的SCR环计数器,以向负载提供直流电力,以产生具有较小波浪失真和较低噪声的三相波形。 脉冲宽度调制通过转向SCR通过转向电路中的电容器放电而导通到环形计数器的负极SCR。 脉冲宽度调制通过外芯元件馈送到环形计数器,而中心核心用于提高放电电容器的脉冲宽度。 来自电动机的自由转动能量被馈送到放电电容器并增加发射能量。
    • 2. 发明授权
    • Simplified wire remote control of small motors
    • 小型电机简化线路远程控制
    • US3614570A
    • 1971-10-19
    • US3614570D
    • 1968-07-03
    • MAGNAVOX CO
    • MAYLE LOUIS F
    • H02P7/64
    • An electric circuit arrangement wherein a load current at a higher voltage can be remotely controlled by a control current at a lower voltage in which the load current passes through a first coil which is magnetically coupled to a second coil in which the control current flows. The magnetic coupling of the coils causes the impedance between the terminals of the second coil to be reflected back to the first coil. When a high impedance is across the terminals of the second coil, a small current, less than that required to activate the load, flows in the first coil whereas upon reduction of the impedance across the terminals of the second coil, the current flowing in the first coil rises to load actuating value. The variable impedance across the terminals of the second coil is, advantageously, a switch which is open for the high impedance condition and which is closed for the low impedance condition.
    • 3. 发明授权
    • Universal motor control system
    • 通用电机控制系统
    • US4673850A
    • 1987-06-16
    • US885309
    • 1986-07-14
    • Wendell E. Maudlin
    • Wendell E. Maudlin
    • G05F1/20H01F29/02H02P4/00H02P7/64
    • H01F29/02G05F1/20H02P4/00Y10S388/929
    • An electrical control means useful in systems wherein a motor, such as a blower motor for an air handling unit, must be run at different speed levels and wherein low voltage power must simultaneously be supplied to another part of the system such as a condenser unit. The invention combines auto-transformer and transformer technologies into a single motor control unit. Wiring to the auto-transformer portion of the unit is arranged in such manner that it may be readily field changed to accommodate the various line voltage and frequency levels encountered worldwide. Thus, a signle standardized unit allows accurate motor speed control and simultaneous low voltage power supply without motor overheating or instability under various line voltage and frequency conditions encountered throughout the world.
    • 一种电气控制装置,其适用于其中诸如用于空气处理单元的鼓风机马达的马达必须以不同的速度运行的系统,并且其中低压功率必须同时被供应到诸如冷凝器单元的系统的另一部分。 本发明将自动变压器和变压器技术结合到单个电机控制单元中。 布置到单元的自动变压器部分的布置方式使得其可以容易地进行场改变以适应全世界遇到的各种线路电压和频率水平。 因此,标牌单元允许精确的电机速度控制和同时的低压电源,而不会在全世界遇到的各种线路电压和频率条件下电机过热或不稳定。
    • 5. 发明授权
    • Motor control circuits
    • 电机控制电路
    • US4214195A
    • 1980-07-22
    • US888300
    • 1978-03-20
    • Robert J. Logan
    • Robert J. Logan
    • H02P25/28H02P7/64
    • H02P25/28
    • A motor control circuit comprises first, second and third saturable reactors connected between three supply lines and the three phases of a motor. The reactors can be excited to energize the motor to give a high torque output in a forward direction. Two further reactors ("reverse" reactors) are connected between the second and third supply lines and the third and second motors phases.In the "forward" condition, the "reverse" reactors are unexcited and have line voltage across them. To drive the motor in the reverse direction at a lower torque level, the first reactor and the "reverse" reactors are excited at a lower level and the second and third reactors are unexcited. However, the latter two reactors are made to operate at a point above the magnetization curve knee point by passing current through them up to their full-load current, and they are thereby "stretched" across a voltage only slightly (say 13%) above the phase voltage. Hence, only the fourth and fifth reactors have to withstand full line voltage.
    • 电机控制电路包括连接在三条电源线和电动机三相之间的第一,第二和第三可饱和电抗器。 可以激励电抗器来激励电动机以在向前方向上产生高扭矩输出。 两个另外的反应器(“反向”反应器)连接在第二和第三供电管线以及第三和第二电动机阶段之间。 在“前进”状态下,“反向”反应器是不精确的并且在它们之间具有线路电压。 为了在较低的扭矩水平下以相反的方向驱动电动机,第一反应器和“反向”反应器在较低的水平被激发,而第二和第三反应器是不起作用的。 然而,后两个电抗器通过使电流通过它们的全负载电流而在高于磁化曲线拐点的点处操作,并且因此它们在仅略微(例如13%)以上的电压上“拉伸” 相电压。 因此,只有第四和第五反应堆必须承受全线电压。