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公开(公告)号：US3535610A
公开(公告)日：1970-10-20
申请号：US3535610D
申请日：1967-11-13
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
CPC classification number: H02M7/1623 , Y10S388/913 , Y10S388/917
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12.发明授权
公开(公告)号：US3421027A
公开(公告)日：1969-01-07
申请号：US3421027D
申请日：1965-10-22
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T , YU JOHNNY DAH-CHUN
IPC: H02P27/02 , H03K17/725 , H03K17/26
CPC classification number: H03K17/725 , H02P27/02 , Y10S388/919
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13.发明授权
公开(公告)号：US3403315A
公开(公告)日：1968-09-24
申请号：US50096865
申请日：1965-10-22
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
IPC: G05D23/24
CPC classification number: G05D23/24 , G05D23/1906
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14.发明授权
公开(公告)号：US3173032A
公开(公告)日：1965-03-09
申请号：US83970259
申请日：1959-09-14
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
IPC: H01J45/00
CPC classification number: H01J45/00
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公开(公告)号：US3135885A
公开(公告)日：1964-06-02
申请号：US80223459
申请日：1959-03-26
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
CPC classification number: H02K5/132 , F04D13/0653
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Patent Agency Ranking
公开(公告)号：US2939400A
公开(公告)日：1960-06-07
申请号：US58304656
申请日：1956-05-07
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
IPC: F04D13/10
CPC classification number: F04D13/10 , Y10S415/901
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公开(公告)号：US2938131A
公开(公告)日：1960-05-24
申请号：US67187557
申请日：1957-07-15
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
IPC: H02K9/197
CPC classification number: H02K9/197
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公开(公告)号：US3668493A
公开(公告)日：1972-06-06
申请号：US3668493D
申请日：1970-05-20
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
CPC classification number: H02P7/293 , Y10S388/907 , Y10S388/917
Abstract: A D.C. shunt motor has the armature connected to a three-phase supply through a pair of parallel connected full-wave rectifier bridges, each having silicon controlled rectifiers in each leg. A separate NOR logic circuit controls gating of each rectifier in accordance with the proper half cycle of the applied voltage and at the desired phase angle to establish a predetermined energization level. The firing is determined by an intercept detector having a separate channel for each phase. Each channel is connected through a lag filter and a lead filter directly to the corresponding phase winding of a reference transformer to supply to the channel a voltage directly derived from the lineto-line voltage applied to the corresponding rectifier. The input to each channel is connected across a center tapped reference transformer winding and the junction of a resistor and capacitor connected across the winding. A D.C. control voltage is applied to the channels to establish a control signal pulse at the proper phase angle of the rectifier-applied voltage.
Abstract translation: 直流分流电机的电枢通过一对并联连接的全波整流桥连接到三相电源，每个桥具有每个支路中的可控硅整流器。 单独的NOR逻辑电路根据所施加的电压的适当的半周期控制每个整流器的门控，并且以期望的相位角来建立预定的通电电平。 射击由具有用于每个相的单独通道的截距检测器确定。 每个通道通过滞后滤波器和引线过滤器直接连接到参考变压器的相应相绕组，以向通道提供直接从施加到相应整流器的线间电压导出的电压。 每个通道的输入通过中心抽头参考变压器绕组和连接在绕组两端的电阻和电容器的接点连接。 将直流控制电压施加到通道以在整流器施加的电压的适当相位角处建立控制信号脉冲。
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公开(公告)号：US3551782A
公开(公告)日：1970-12-29
申请号：US3551782D
申请日：1968-04-18
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T
CPC classification number: H02H7/0833 , H02P7/293
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20.发明授权
公开(公告)号：US3551748A
公开(公告)日：1970-12-29
申请号：US3551748D
申请日：1968-10-10
Applicant: SMITH CORP A O
Inventor： MAYNARD JOHN T , LUNZ JOHN E
CPC classification number: H02H11/004 , H02H3/253 , H02P7/2913
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