利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

109 条记录 (耗时 0.014 秒)

    Apparatus and method for controlling a force commutated inverter
    11.
    发明公开
    Apparatus and method for controlling a force commutated inverter 失效
    用于控制力传感逆变器的装置和方法

    公开(公告)号：EP0259240A3

    公开(公告)日：1989-06-14

    申请号：EP87630134.2

    申请日：1987-07-28

    申请人： INTERNATIONAL FUEL CELLS CORPORATION

    发明人： Lipman, Kenneth ,  Young, Douglas Gibbons

    IPC分类号： H02M7/527

    CPC分类号： H02M7/529 ,  Y10T307/516

    摘要： A method and apparatus is disclosed for generating thyristor gating signals for a force commutated inverter in order to produce variable frequency pulse-width modulated output waveforms with the appropriate percent fundamental voltage content for reactive power control and with the correct phase relationship to the utility line for real power control. A signal processor in conjunction with a memory is used to store individual patterns for generating a wide variety of PWM waveforms at different frequencies over the entire modulation range so as to provide the designer with the flexibility to select the most advantageous harmonic cancellation for each operating point. An embodiment of the invention disclosed uses three microprocessors to generate the PWM waveforms and a fourth microprocessor to synchronize the other three and produce the required phase shift. The principles disclosed apply to inverters used and controlled in parallel with a grid of real and reactive control signal commands and also those used independently by means of voltage magnitude commands.

    Three-phase supply system
    12.
    发明公开
    Three-phase supply system 失效
    Dreiphasenversorgungssystem。

    公开(公告)号：EP0272776A2

    公开(公告)日：1988-06-29

    申请号：EP87309033.6

    申请日：1987-10-13

    申请人： GLENTRONIC LIMITED

    发明人： McAlpine, Thomas Millrig House

    IPC分类号： H02M5/45 ,  H02M7/527

    CPC分类号： H02M7/527

    摘要： A three-phase supply system is described which has particular application for single to three-phase converters and variable speed three-phase a.c. motor controllers. This is achieved by using a solid state six element voltage-source inverter (20) to achieve and control the dual conversion of voltage and frequency. The solid state unit is used in the single to three-phase converter and in a three-phase to three-phase converter and consists of six power switches (34), (gate turn-off switches (GTOs)) which invert the fixed d.c. voltage derived from a recti­fied single-phase or three-phase a.c. mains (12,82) to provide a required symmetrical three-phase output supply (22). The use of solid state elements enables the unit to be controlled from a processing unit (54) which can be programmed and set so that the output voltage and frequency is carefully controlled to meet supply requirements for both the three-phase power supply and to achieve variable speed a.c. motor control.

    摘要翻译： 描述了一种三相供电系统，其特别适用于单相三相转换器和变速三相交流电源。 电机控制器。 这是通过使用固态六元件电压源逆变器（20）来实现和控制电压和频率的双重转换来实现的。 固态单元用于单相到三相转换器和三相至三相转换器，由六个电源开关（34），（门极关断开关（GTO））组成，其反转固定直流电流。 由整流单相或三相交流产生的电压。 电源（12,82），以提供所需的对称三相输出电源（22）。 使用固态元件使得可以从可以被编程和设置的处理单元（54）来控制单元，使得仔细地控制输出电压和频率以满足三相电源的供电要求并实现 变速交流 电机控制。