公开(公告)号：US3852657A

公开(公告)日：1974-12-03

申请号：US41723973

申请日：1973-11-19

Applicant: GEN ELECTRIC

Inventor： SKOGSHOLM E ,  TRACY J

IPC: H02M7/521 ,  H02M7/515 ,  H02M7/52 ,  H02M1/18

CPC classification number: H02M7/5155

Abstract: An inverter circuit utilizing controlled rectifiers for changing direct current power to alternating current power is provided with control apparatus which includes means to sense variations in an operational parameter to provide compensation to insure that a current utilized to commutate or turn off a conducting rectifier is maintained substantially constant.

Abstract translation: 利用控制整流器将逆变电流用于将直流电功率改变为交流功率的逆变器电路提供有控制装置，该控制装置包括用于检测操作参数的变化以提供补偿以确保用于换向或关闭导电整流器的电流基本上保持的装置 不变。

公开(公告)号：US3718847A

公开(公告)日：1973-02-27

申请号：US3718847D

申请日：1971-05-28

Applicant: GEN ELECTRIC

Inventor： GRAF C ,  SKOGSHOLM E ,  VOLKMANN W

IPC: G05B20060101 ,  G05D13/62 ,  G05F20060101 ,  H02P27/06 ,  H02P5/40

CPC classification number: H02P27/06 ,  H02P27/047

Abstract: D R A W I N G
THE CURRENT AND VOLTAGE TO EACH PHASE OF AN A-C MOTOR ARE SENSED AND UTILIZED TO PRODUCE A PHASE CONTROL SIGNAL HAVING AN AVERAGE VALUE PORTIONAL TO THE AVERAGE MAGNITUDE OF THE IN-PHASE CURRENT WITHIN THAT PHASE. THE PHASE CONTROL SIGNALS ARE SUMMED TO PRODUCE A COMPOSITE SIGNAL INDICATIVE OF CERTAIN MOTOR OPERATING CHARACTERISTICS, INCLUDING SLIP AND TORQUE, THE COMPOSITE CONTROL SIGNAL BEING SUPPLIED TO THE CONTROL OF AN INVERTER WHICH PRODUCES VARIABLE FREQUENCY ALTERNATING CURRENT ELECTRIC POWER FOR DRIVING THE A-C MOTOR. IN RESPONSE TO VARIATIONS IN THE COMPOSITE CONTROL SIGNAL, THE FUNDAMENTAL FREQUENCY AND THE AVERAGE VOLTAGE OF THE ALTERNATING CURRENT POWER ARE ADJUSTED BY THE CONTROL.

公开(公告)号：US3716775A

公开(公告)日：1973-02-13

申请号：US16257571

申请日：1971-07-14

Applicant: GEN ELECTRIC

Inventor： SKOGSHOLM E

IPC: H02H7/122 ,  H02M5/44

CPC classification number: H02H7/1225

Abstract: A SOLID STATE POWER CIRCUIT, SUCH AS A POLYPHASE INVERTER OF ENERGIZING AN A-C MOTOR IN AN A-C ADJUSTABLE SPEED DRIVE SYSTEM, INCLUDES TWO OR MORE PARALLEL CONNECTED SERIES CIRCUITS EACH INCLUDING A PAIR OF ALTERNATELY CONDUCTIVE THYRISTORS IN SERIES INDICTIVE MEANS AND A FILTER NETWORK INCLUDING AT LEAST TWO L-C STAGES FOR SUPPLYING D-C ELECTRIC POWER TO THE SERIES CIRCUITS FROM A SOURCE OF ELECTRIC POTENTIAL. WHEN A SHORT CIRCUIT OR SHOOTTHROUGH IN THE POWER CIRCUIT HAS OCCURRED OR, UNDER SOME CONDITIONS, IS ABOUT TO OCCUR, THE RESULTING HIGH CURRENT FLOW TO THE SERIES CIRCUITS FROM THE FILTER NETWORK IS DETECTED AND ALL OF THE THYRISTORS OF AT LEAST TWO OF THE SERIES CIRCUITS ARE TURNED ON SIMULTANEOUSLY IN RESPONSE TO THE DETECTED CURRENT SUCH THAT THE FILTER CAPACITOR OF THE L-C STAGE ADJACENT THE SERIES CIRCUITS WILL RESONATE WITH THE TOTAL EFFECTIVE PARALLEL INDUCTANCE IN THE SERIES CIRCUITS TO PROVIDE SUFFICIENT REVERSE VOLTAGE TO TURN OFF ALL OF THE TYRISTORS. TO RESPOND TO INCREASED CURRENT FLOW RESULTING FROM A WIDE RANGE OF FAULT CONDITIONS IN AN EFFECTIVE AND ECONOMICAL MANNER, THE DETECTION MEANS IS RESPONSIVE TO THE CAPACITIVE CURRENT FLOW IN AT LEAST TWO OF THE L-C STAGES INCLUDING THE TWO STAGES ADJACENT THE SERIES CIRCUITS. A DIODE OR SIMILAR RECITIFER IS PROVIDED ACROSS THE FILTER INDUCTOR OF THE L-C STAGE ADJACENT THE SERIES CIRCUITS TO PREVENT EXCESSIVE VOLTAGE ON THE RESONATING CAPACITOR, TO CONTROL RIPLE VOLTAGE, AND TO PREVENT UNDAMPED OSCILLATIONS IN THE FILTER NETWORK

D R A W I N G

公开(公告)号：US3800198A

公开(公告)日：1974-03-26

申请号：US17212271

申请日：1971-08-16

Applicant: GEN ELECTRIC

Inventor： GRAF C ,  SKOGSHOLM E

IPC: H02P23/00 ,  G05F1/10 ,  H02H3/20 ,  H02H7/08 ,  H02H7/122 ,  H02H9/04 ,  H02P ,  H02M

CPC classification number: H02H7/0838 ,  H02H3/207 ,  H02H7/1222

Abstract: An electrical power system includes power conversion apparatus for receiving electric power from a source and supplying the electric power in converted form to a load and control apparatus for automatically stopping the operation of the power conversion apparatus in response to the departure of a selected operating parameter, such as input voltage to the power conversion apparatus, from a preestablished range having upper and lower limits. A signal representative of the operating parameter is sensed and utilized to produce an out-of-range signal only when the operating parameter departs from the preestablished range, the out-of-range signal being utilized in turn to stop the operation of the power conversion apparatus.

Abstract translation: 电力系统包括用于从源接收电力并将转换形式的电力提供给负载和控制装置的电力转换装置，用于响应于所选择的操作参数的偏离自动停止电力转换装置的操作， 例如从具有上限和下限的预先建立的范围到电力转换装置的输入电压。 仅当操作参数偏离预先设定的范围时，感测并利用代表操作参数的信号来产生超出范围的信号，反过来使用超出范围的信号停止功率转换的操作 仪器。

公开(公告)号：US3775651A

公开(公告)日：1973-11-27

申请号：US3775651D

申请日：1971-12-17

Applicant: GEN ELECTRIC

Inventor： GRAF C ,  SKOGSHOLM E ,  TRACY J

IPC: H02H7/08 ,  H02P27/06 ,  H02P5/40

CPC classification number: H02H7/0833

Abstract: The actual electric current transmitted between a source of variable voltage electric power and an electric motor connected thereto is continuously monitored and utilized to generate a first control signal in response to a motoring current equal to or greater than a predetermined level and a second control signal in response to a regenerative current equal to or greater than a predetermined level. A regulator is responsive to the first control signal to reduce the output voltage of the electric power source and to the second control signal to increase the output voltage of the power source, the result being a rapid reduction in the actual current.

Abstract translation: 在可变电压电源和与其连接的电动机之间传输的实际电流被连续监测并用于响应于等于或大于预定电平的电动电流和第二控制信号而产生第一控制信号 响应于等于或大于预定水平的再生电流。 调节器响应于第一控制信号以减小电源的输出电压和第二控制信号以增加电源的输出电压，结果是实际电流的快速减小。

公开(公告)号：US3718851A

公开(公告)日：1973-02-27

申请号：US3718851D

申请日：1971-08-16

Applicant: GEN ELECTRIC

Inventor： GRAF C ,  SKOGSHOLM E

IPC: H02P23/00 ,  G05F1/10 ,  H02H7/12 ,  H02H9/04 ,  H02M7/525 ,  H02M7/72 ,  H02M7/52 ,  H02M1/18 ,  H02P

CPC classification number: H02H7/1216 ,  H02H9/04 ,  H02M7/525

Abstract: The d-c voltage of reversible d-c to a-c power conversion apparatus is continuously sensed and utilized to produce an overvoltage signal when and only when the d-c voltage is equal to or greater than a pre-determined level. The overvoltage signal is transmitted to the control means for the power conversion apparatus as a control signal, the magnitude and polarity of the overvoltage signal being such that the operating frequency of power conversion means is increased.

Abstract translation: 当且仅当d-c电压等于或大于预定电平时，可逆式d-c至a-c电力转换装置的d-c电压被连续感测并用于产生过压信号。 过电压信号作为控制信号发送到用于功率转换装置的控制装置，过电压信号的大小和极性使得功率转换装置的工作频率增加。