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2. 发明专利

JP2931800B2 失效
公开(公告)号：JP2931800B2
公开(公告)日：1999-08-09
申请号：JP14937197
申请日：1997-06-06
申请人： SANSEI DENSHI KK
发明人： TEI KATSUAKI
IPC分类号： G05F1/02 , G05D1/02
摘要： A tracking control circuit for directly controlling the tracking (i.e., the steering) of an automatic guide vehicle (AGV) without utilizing a central processing unit (CPU) for control. The circuit controls the tracking of the AGV by comparing a first induced voltage with a second induced voltage to sense the tracking state (i.e., whether the AGV is veering right or left of the appropriate path), and then providing to a servo interface board either a voltage obtained by subtracting a reference voltage from the first induced voltage or a voltage obtained by subtracting the second induced voltage from the reference voltage. Which voltage is provided is determined in accordance with the sensed result of the tracking state.

3. 发明专利

JPH1069313A TRACKING CONTROL CIRCUIT FOR UNMANNED CARRIAGE 失效
公开(公告)号：JPH1069313A
公开(公告)日：1998-03-10
申请号：JP14937197
申请日：1997-06-06
申请人： SAMSUNG ELECTRONIC
发明人： TEI SHOJITSU
IPC分类号： G05F1/02 , G05D1/02
摘要： PROBLEM TO BE SOLVED: To provide the tracking controller for the unmanned carriage which controls the tracking of the unmanned carriage directly by using a voltage outputted by a sensor which senses an electron wave transmitted through a buried electric conductor and a reference voltage. SOLUTION: First and second comparing means 301 and 304 compare 1st and 2nd induced voltages Vr and V1 to each other provided by sensors positioned on the right and left sides of the buried line for guiding the unmanned carriage at a constant distance and output specific switching control signals according to the comparison results, and 1st and 2nd switching means are switched with the said signals and transmit the 1st or 2nd induced voltage; and 3rd and 4th switching means 305 and 306 select and output the voltages outputted from the 1st and 2nd switching means or the specific reference voltage Vref induced between the buried line and sensors, and a subtracting means 307 subtracts the latter from the former to output a signal for controlling the tracking.

4. 发明专利

JPH08137559A PLASMA ARC POWER UNIT 失效
公开(公告)号：JPH08137559A
公开(公告)日：1996-05-31
申请号：JP30146094
申请日：1994-11-09
申请人： SANSHA ELECTRIC MFG CO LTD
发明人： KANO KUNIO , MORIGUCHI HARUO , FUJIYOSHI TOSHIICHI , KINOSHITA ATSUSHI , HASHIMOTO TAKASHI
IPC分类号： B23K10/00 , G05F1/02 , G05F1/10 , H02M9/00
摘要： PURPOSE: To prolong the service life of an electrode by superposing a specific AC current onto a DC current that is used for generation of the plasma arc. CONSTITUTION: An AC power supply is rectified by an input rectifying part 11, converted into a high frequency AC by an inverter 12, transformed by a transformer 13, rectified again by an output rectifying part 14, and supplied between an electrode 21 of a plasma torch 2 and a work 3 via a starting part 15. Then the current flowing between the electrode 21 and the work 3 is detected by a current detection part 16, and the difference between the output signal of the part 16 and the reference signal of a reference signal generation part 17 is outputted from an error amplifying part 18. The inverter 12 is controlled by an inverter control part 19 so that the preceding difference between both signals is eliminated. The reference signal is obtained by superposing an AC signal having its variable frequency and amplitude onto a prescribed DC signal. When the frequency and amplitude of the reference signal are varied, a current acquired by superposing an AC current having the prescribed frequency and amplitude onto a prescribed DC current is supplied between the electrode 21 and an object 3.

5. 发明专利

JPH07336880A WELDING SOURCE 失效
公开(公告)号：JPH07336880A
公开(公告)日：1995-12-22
申请号：JP12251894
申请日：1994-06-03
申请人： NIPPON AVIONICS CO LTD
发明人： TAKASAKI HIROYUKI , TORII SHIGEFUMI
IPC分类号： H02H11/00 , G05F1/02 , H02H7/12 , H02M9/00
摘要： PURPOSE:To protect a drive system circuit, a welding head and an article to be welded. CONSTITUTION:When a line 30a or 30b is disconnected, an OR circuit 24 outputs a signal FB. When the lines 30a, 30b are connected reversely and an output from an amplifier 25 is made larger than voltage Vref1, a comparator 26 outputs a signal FR. When the conditions of welding are not stabilized and an output from a differential amplifier 15 is made larger than voltage Vref2, a comparator 27 outputs a signal CE. When a current value from a buffer 11a is made larger than voltage Vref3, a comparator 28 output a signal IE. When the signals FB, FR, CE, IE are input to a CPU 13a or a current value or a voltage value from an A/D converter 18 is made larger than a threshold, an error message is displayed to an output device 20, and the supply of a welding head 7 with currents is stopped.

6. 发明专利

JPH07170742A POWER CONVERTER FOR SUPPLYING DIRECT CURRENT TO ARC ELECTRIC FURNACE 失效
公开(公告)号：JPH07170742A
公开(公告)日：1995-07-04
申请号：JP11231594
申请日：1994-04-27
申请人： CEGELEC METALS SYSTEMS
发明人： JIYATSUKU DOYU PARUKU , KURISUTOFU GURINSUKI , MISHIERU UYURUSUTEZEN
IPC分类号： H05B7/18 , C21C5/52 , G05F1/02 , H02J3/18 , H02M7/12 , H02M7/162 , H02M7/17 , H05B7/144 , H05B7/148
摘要： PURPOSE: To provide an improved power converter for supplying DC to an electric arc furnace. CONSTITUTION: This device is constituted of at least one of transformers 9, 10, 11, wherein three-phase AC is supplied to a primary side transformer 9 and three-phase AC to be applied to a rectifying means is supplied by at least one of secondary side transformers 10, 11, and the rectified voltage and current is supplied to a load from an output terminal of the rectifying means. The rectifying means has a pair of controlled semiconductors 15, 16 for each of the secondary sides. The rectifying means has a freewheel circuit 19 and is structured so that a duration of conduction in the freewheel circuit can be extended with a conduction duration of a triggered semiconductor which is shortened or reverse, nearly constant effective current or ineffective current can be supplied to the load, regardless of a change in impedance of the load. Basically, the semiconductors are triggered at a variable firing angle.

7. 发明专利

JPH06100947B2 失效
公开(公告)号：JPH06100947B2
公开(公告)日：1994-12-12
申请号：JP1921088
申请日：1988-01-29
IPC分类号： G05F1/02 , G06F1/24 , G06F1/26 , H02J7/00

8. 发明专利

JPH04311560A VACUUM ARC DEPOSITING EQUIPMENT 失效
公开(公告)号：JPH04311560A
公开(公告)日：1992-11-04
申请号：JP7795291
申请日：1991-04-10
申请人： KOBE STEEL LTD
发明人： TAMAGAKI HIROSHI
IPC分类号： C23C14/24 , C23C14/32 , C23C14/54 , G05F1/02 , H01J37/32 , H05B7/18
摘要： PURPOSE:To automatically obtain reproducibility at treated lot without intervention of an operator by automatically adjusting variation of evaporation characteristic due to consumption of a vacuum arc evaporating source. CONSTITUTION:Current monitor signal which is monitored by arc discharge current is converted to pulse signal by V/F convertor 5. And pulse signal is integrated with preset counter 6 to obtain time integrated value of arc discharge current by which current setting signal in arc electric source 4 is controlled to raise arc discharge current equivalent to comsumption in the evaporating source.

9. 发明专利

JPH03178726A POWER CIRCUIT FOR ELECTRIC DISCHARGE MACHINE 失效
公开(公告)号：JPH03178726A
公开(公告)日：1991-08-02
申请号：JP31730089
申请日：1989-12-06
申请人： SODICK CO LTD
发明人： KANEKO YUJI
IPC分类号： B23H1/02 , B23H7/14 , G05F1/02
摘要： PURPOSE:To reduce the possibility that a processing current is cut off by providing a short-circuiting means for short-circuiting an inductance element at the rise of the processing current and also for releasing the short circuit of the inductance element after the rise of the processing current. CONSTITUTION:In a power circuit for an electric discharge machine for intermittently turning on a first switching element TR1 connected between a power source B and a gap G, an inductance element L is connected in series to the gap G, and the inductance element L is short-circuited by a second switching element TR2 during the rise time of a processing current. A time constant will not therefore be increased by the inductance element L and so the rise of the channel form of the processing current will not deteriorate, and also the action of the inductance element L prevents the processing current from being cut off after the rise of the processing current.

10. 实用新型

JPH035924Y2 失效
公开(公告)号：JPH035924Y2
公开(公告)日：1991-02-15
申请号：JP7986181
申请日：1981-05-30
IPC分类号： G05F1/02 , B23K9/00 , B23K9/06 , B23K9/073 , G21K5/02 , H05H1/48

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