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    • 25. 发明授权
    • Single phase to three phase dynamoelectric converter
    • 单相到三相电动转换器
    • US4656575A
    • 1987-04-07
    • US853652
    • 1986-04-18
    • Reed West
    • Reed West
    • H02M5/14H02P1/16H02P11/06H02M5/32
    • H02M5/14H02P1/16H02P11/06
    • Single phase to three phase dynamoelectric converter for generating three-phase current from a single-phase input comprising a three-phase electric motor generator having first, second and third Y-wound stator windings, a bank of run capacitors connected between the first powered stator winding and the third unpowered stator winding, a normally closed potential-type relay with its winding connected between the second and third stator windings, a normally open slave relay with its winding connected between the first stator winding and the potential relay winding through the set of normally closed potential relay contacts, and a bank of starter capacitors connected between the third stator winding and one of the slave relay open contacts adapted to provide phase shifted starting power to the third stator winding when the single phase energy is applied and disconnect from the third stator winding to allow the converter to run and produce balanced three-phase power that can be drawn from all three stator windings for use to start and drive externally located three-phase motors.
    • 用于从单相输入产生三相电流的单相到三相电动转换器,包括具有第一,第二和第三Y绕组定子绕组的三相电动发电机,连接在第一动力定子 绕组和第三无动力定子绕组,常闭电位型继电器,其绕组连接在第二和第三定子绕组之间,常开从动继电器,其绕组连接在第一定子绕组和电位继电器绕组之间, 常闭电位继电器触点和连接在第三定子绕组和一个从继电器开路触点之间的起动电容器组,适于在施加单相能量并与第三定子绕组断开时向第三定子绕组提供相移起动功率 定子绕组允许转换器运行并产生可以从a抽出的平衡三相电源 三个定子绕组用于启动和驱动外部位置的三相电机。
    • 26. 发明授权
    • Non-interruptible power supply systems
    • 不可中断电源系统
    • US4168459A
    • 1979-09-18
    • US844597
    • 1977-10-25
    • John F. Roesel, Jr.
    • John F. Roesel, Jr.
    • H02J9/08G05F1/66H02J9/06H02K19/24H02K21/04H02K21/26H02K47/20H02P11/06H02K16/00H02K47/04
    • H02K21/046H02J9/066H02K47/20
    • A non-interruptible power system (NIPS) for generating polyphase A.C. of a substantially constant desired frequency and a substantially constant selected voltage, comprising:(A) a source of interruptible power and a motor energized thereby,(B) a novel generator for producing the desired polyphase A.C. driven by the motor, the generator comprising a plurality of field cores each having a cylindrical surface with a layer of magnetizable permanent magnetic material thereon, cooperatively juxtaposed wound stators each with an excitation coil therein for magnetizing an adjacent layer of permanent magnetic material into a pattern of magnetic poles and at a high remanent flux density, modifying windings for changing the remanent flux density in such pole pattern, supplementing windings for energizing the excitation coil, and primary potential generating windings in slots in the stator, a source of exciter current, and electrical control means for the generator,(C) the generator producing the desired substantially constant frequency A.C. at the desired voltage regardless of variations in the motor speed and even for a brief period of time when the source of power to the motor is interrupted by converting a part of its rotational energy to A.C. output, and leading windings, alone, or with lagging windings, in each of the wound stators having the primary windings, the leading and lagging windings being placed in such positions that, in a three-stator generator, they will each generate a single phase A.C. potential from about 110.degree. to 115.degree. out of phase with the single phase A.C. generated by the primary windings in the same stator, but the A.C. potentials of the leading windings and lagging windings of one stator will each be synchronous with the single phase A.C. potential developed in the other stators' primary windings, thereby obtaining three phase A.C. having a low total harmonic distortion.
    • 一种用于产生基本上恒定的期望频率和基本恒定的所选电压的多相交流电的不可中断电力系统(NIPS),包括: