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1. 发明授权

US4134000A Protection circuit for electrical discharge machining power supply apparatus 失效
标题翻译：放电加工电源装置保护电路
公开(公告)号：US4134000A
公开(公告)日：1979-01-09
申请号：US757977
申请日：1977-01-10
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Jeter O. Barker
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Jeter O. Barker
IPC分类号： B23H1/02 , B23P1/08
CPC分类号： B23H1/026 , B23H1/028
摘要： A protection circuit which senses and responds to an output transistor failure to provide appropriate power interruption to protect an electrical discharge machining apparatus. The circuit receives an input of either standard or reverse polarity from the gap. This signal is passed through a comparator stage where it is compared with a preset voltage level. Further inputs are provided in accordance with the polarity setting and from the multivibrator in such manner that an appropriate phase relationship is maintained depending on the preset polarity. A control signal is then generated to control a transistor switching device with an interrupt signal thus being furnished to turn-off the power supply. Also included in a different embodiment of the invention is a system whereby, in a multiple gap output module power supply, responsive to failure of an output transistor in any one of the output modules, the entire power supply is cut off.
摘要翻译：检测和响应输出晶体管的保护电路不能提供适当的电源中断来保护放电加工设备。电路从间隙接收标准或反极性的输入。该信号通过比较器级，其中与预设电压电平进行比较。根据极性设置和多谐振荡器提供进一步的输入，使得根据预设极性保持适当的相位关系。然后产生控制信号以控制具有中断信号的晶体管开关器件，从而被提供以关断电源。还包括在本发明的不同实施例中的是一种系统，其中，在多间隙输出模块电源中，响应于任何一个输出模块中的输出晶体管的故障，整个电源被切断。

2. 发明授权

US3623148A Apparatus for sensing the frequency of machining pulses from an edm power supply 失效
标题翻译：用于感应电火花塞电加工脉冲频率的装置
公开(公告)号：US3623148A
公开(公告)日：1971-11-23
申请号：US3623148D
申请日：1970-07-13
申请人： CINCINNATI MILACRON INC
发明人： BERGHAUSEN PHILIP E
IPC分类号： B23H1/02 , B23K9/10
CPC分类号： B23H1/026
摘要： An apparatus for monitoring the frequency of output pulses from an EDM power supply and terminating the operation of the supply when the output pulse frequency exceeds a predetermined magnitude. The apparatus comprises a frequency sensing circuit that produces an output signal having a magnitude that is a function of the output pulse frequency. A switching network is connected to the sensing circuit and terminates the operation of the power supply in response to an output signal representing the predetermined output pulse frequency magnitude.

3. 发明授权

US3399288A Circuit breaking apparatus and method for pulse operated electronic switch 失效
标题翻译：脉冲电子开关断路装置及方法
公开(公告)号：US3399288A
公开(公告)日：1968-08-27
申请号：US46035965
申请日：1965-06-01
申请人： INGERSOLL MILLING MACHINE CO
发明人： HANS SCHIERHOLT
IPC分类号： B23H1/02 , H02H7/00 , H02H7/12
CPC分类号： B23H1/026 , H02H7/00 , H02H7/12

4. 发明授权

US3138690A Fail safe power feed system 失效
标题翻译：故障安全供电系统
公开(公告)号：US3138690A
公开(公告)日：1964-06-23
申请号：US10267961
申请日：1961-04-13
申请人： ELOX CORP MICHIGAN
发明人： WEBB ROBERT S
IPC分类号： B23H1/02
CPC分类号： B23H1/026

5. 发明授权

US2866921A Arc machining 失效
标题翻译：电弧加工
公开(公告)号：US2866921A
公开(公告)日：1958-12-30
申请号：US56718656
申请日：1956-02-23
申请人： ELOX CORP MICHIGAN
发明人： MATULAITIS VICTOR E , WALTER LOBUR
IPC分类号： B23H1/02
CPC分类号： B23H1/026

6. 发明申请

US20180065200A1 ELECTRICAL MACHINING DEVICE AND METHOD, HYBRID MACHINING SYSTEM AND METHOD 审中-公开
公开(公告)号：US20180065200A1
公开(公告)日：2018-03-08
申请号：US15658855
申请日：2017-07-25
申请人： General Electric Company
发明人： Dong LIU , Andrew Lee TRIMMER , Yuanfeng LUO , Steven Robert HAYASHI
IPC分类号： B23H1/04 , B23H1/02 , B65H35/00
CPC分类号： B23H1/04 , B23H1/024 , B23H1/026 , B23H5/04 , B23H7/18 , B23H7/30 , B23H2500/00 , B65H35/00 , G05B2219/41029 , G05B2219/45221
摘要： An electrical machining method comprises machining a workpiece by an electrical machining device comprising an electrode; increasing a feedrate of the electrode at a first acceleration if a discharge current passing through the electrode and the workpiece is lower than a discharge current reference; and decreasing the feedrate of the electrode at a second acceleration if the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.

7. 发明授权

US5329088A Electrical discharge power supply circuit 失效
标题翻译：放电电源电路
公开(公告)号：US5329088A
公开(公告)日：1994-07-12
申请号：US909981
申请日：1992-07-07
申请人： Toshiyuki Kaitani , Toshiharu Adachi
发明人： Toshiyuki Kaitani , Toshiharu Adachi
IPC分类号： B23H1/02
CPC分类号： B23H1/026 , B23H1/022 , B23H2300/20 , B23H2300/22
摘要： An electrical discharge machining power supply circuit for machining a workpiece, including: a power supply circuit; a first circuit including a first switching device and a first rectifying device; a second circuit including a second switching device and a second rectifying device; an electrical discharge machining electrode for providing an electrical discharge to the workpiece; and a first circuit device for preventing an excessive current generated by wiring inductance in the circuit from damaging at least the first switching device.
摘要翻译：一种用于加工工件的放电加工电源电路，包括：电源电路; 包括第一开关装置和第一整流装置的第一电路; 包括第二开关装置和第二整流装置的第二电路; 用于向工件提供放电的放电加工电极; 以及第一电路装置，用于防止电路中的布线电感产生的过大电流至少损坏第一开关装置。

8. 发明授权

US4733058A Fail transistor detection and display system for electrical discharge machining apparatus 失效
标题翻译：放电加工设备失效晶体管检测和显示系统
公开(公告)号：US4733058A
公开(公告)日：1988-03-22
申请号：US834377
申请日：1986-02-28
申请人： Kuang-Ta Ho , Oliver A. Bell, Jr.
发明人： Kuang-Ta Ho , Oliver A. Bell, Jr.
IPC分类号： B23H1/02 , H03K17/0814 , H03K17/18 , H02H3/00
CPC分类号： H03K17/08142 , B23H1/026 , H03K17/18
摘要： An EDM circuit that detects power transistor switch failure. A comparator 62 and a sample and hold stage 60 are used during a window of time formed by the off-time of a pulse generator to determine whether power switch MOSFET 30 is conducting. If MOSFET 30 is conducting during the off-time of the pulse generator LED 72 will emit light to indicate a failed power transistor switch.
摘要翻译：检测功率晶体管开关故障的EDM电路。在由脉冲发生器的关断时间形成的时间窗口期间使用比较器62和采样保持级60，以确定功率开关MOSFET 30是否导通。如果MOSFET 30在脉冲发生器的关闭时间期间导通，则LED 72将发光以指示故障功率晶体管开关。

9. 发明授权

US3851134A Electrical discharge machining power switch short circuit detection 失效
标题翻译：电气放电加工电源开关短路检测
公开(公告)号：US3851134A
公开(公告)日：1974-11-26
申请号：US41270273
申请日：1973-11-05
申请人： TAKARADA E
发明人： TAKARADA E
IPC分类号： B23H1/02 , B23K9/16
CPC分类号： B23H1/026
摘要： To detect short circuit failures of power switches in electrical discharge machining power supplies, the voltages developed across the power switches are sampled and, if any one of the sampled voltages is below a predetermined level, the delivery of power to the gap is interrupted.
摘要翻译：为了检测放电加工电源中的电源开关的短路故障，对电源开关两端产生的电压进行采样，并且如果采样电压中的任何一个低于预定电平，则中断对间隙的供电。

10. 发明授权

US3805012A Electrical discharge machining power supply with protective system for output switch failure 失效
标题翻译：具有输出开关故障保护系统的放电加工电源
公开(公告)号：US3805012A
公开(公告)日：1974-04-16
申请号：US34198073
申请日：1973-03-16
申请人： COLT IND OPERATING CORP
发明人： BELL O , GILLELAND R
IPC分类号： B23H1/02 , B23K9/16
CPC分类号： B23H1/026
摘要： A digitally controlled multivibrator for the power supply is used to supply machining power pulses of predetermined ON and OFF time duration. The pulse output from the digital multivibrator is passed through at least one intermediate drive stage to trigger an electronic output switch, which is operatively connected both to a main DC power source and the gap, to actually provide the machining power pulses thereto. Responsive to a predetermined drop in drive signal being furnished to the output switch, the cut-off of the main machining power source is provided through operation of a field effector transistor switch. In addition, the protective system which would cut off the output switch in its fail-short condition is inhibited for the duration of any gap short circuit condition.
摘要翻译：用于电源的数字控制多谐振荡器用于提供预定ON和OFF持续时间的加工功率脉冲。来自数字多谐振荡器的脉冲输出通过至少一个中间驱动级以触发可操作地连接到主DC电源和间隙的电子输出开关，以实际提供加工功率脉冲。响应于向输出开关提供的驱动信号的预定下降，通过场效应晶体管开关的操作来提供主加工电源的截止。此外，在任何间隙短路状态的持续时间内，将禁止在故障短路状态下切断输出开关的保护系统。

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