EP0963593A1 - Motor drive - Google Patents
Motor driveInfo
- Publication number
- EP0963593A1 EP0963593A1 EP98904049A EP98904049A EP0963593A1 EP 0963593 A1 EP0963593 A1 EP 0963593A1 EP 98904049 A EP98904049 A EP 98904049A EP 98904049 A EP98904049 A EP 98904049A EP 0963593 A1 EP0963593 A1 EP 0963593A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- cam
- motor drive
- additional
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000007257 malfunction Effects 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
- H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
- H01H47/005—Safety control circuits therefor, e.g. chain of relays mutually monitoring each other
Definitions
- the invention relates to a motor drive for tap changers, diverters and plunger core coils according to the preamble of the first claim.
- the generic motor drive is preferably used to set the tap changer to the desired operating position.
- the load gearbox operates the tap changer directly; for this purpose, it has an appropriately dimensioned electric motor.
- the control gear is arranged on the side of the load gear and contains a cam disk which rotates one full revolution each time the step switch is switched. This cam disk contains a large number of switching cams for the mechanical actuation of numerous cam switches or cam-actuated contacts, which are at the same time part of the electrical modules to be explained.
- the control gear also contains means for displaying the step position or the switching step. /
- the most important electrical components in the motor drive are the different circuits.
- the motor drive is controlled according to the principle of step switching, i.e. an adjustment process by one switching step is initiated by a one-time control pulse and is then necessarily brought to an end.
- the output shaft of the motor drive which is coupled to the input shaft of the tap changer when fully assembled, performs a precisely defined number of revolutions.
- the running time of the stepping circuit is determined by a control cam of the control gear with one revolution per stage.
- a DurcUau protection device which prevents the motor drive from running through to the end position if the step control described fails. Such a failure of the step control can occur if, for example, a motor contactor "sticks" or a coil of the step switching relay, which is part of the step control, becomes defective.
- this continuous protection is implemented by an additional time relay in the control circuit, which is excited by contacts of the motor contactor. If the corresponding motor contactor is used after a specified time, in practical operation e.g. 7 seconds, has not yet dropped, i.e. If a new unwanted changeover from one stage to an adjacent other stage of the tap changer begins, the timing relay triggers the motor protection switch and thus stops the drive.
- timing relays used are themselves relatively susceptible to faults and also quite expensive because of the required electronic components. Additional contactor contacts are also required to excite them.
- the object of the invention is therefore to provide a new type of motor drive with a continuous protection, which is simple and inexpensive and yet works self-monitoring and error-free.
- two additional control cams are present in the control gearbox, which correspond to additional cam-controlled monitoring contacts and monitor the contactor contact points and trigger the motor-protective circuit-breaker if the contact position is incorrect, which could lead to an impermissible motor run beyond the new position to be controlled and into the end position.
- a time relay according to the prior art is generally superfluous for this purpose.
- the first control cam according to the invention with the corresponding first additional cam-controlled monitoring contact monitors the position of the contactor contact of the relay for the stepping circuit
- the second control cam according to the invention in turn monitors the position of the motor contactor with the corresponding second additional cam-controlled monitoring contact.
- the motor contactor can "stick", then the motor drive runs through to the end position.
- the relay for the step switching does not pick up - be it that it is defective or that there is a fault in the supply line - then the motor drive also runs through to the end position.
- the two control cams provided according to the invention which each interact with a cam-controlled monitoring contact actuated by them, enable reliable protection against runs caused by both errors with minimal
- Step switching is present and a maximum of one step adjustment if there is an error on the
- Motor contactor is present - at the latest then the motor protection switch is triggered.
- Fig. 1 shows the circuit of a motor drive according to the invention
- Fig. 2 shows the actuation sequence of the contacts involved in the circuit shown in Fig. 1, which are controlled by the cam, during a changeover, i.e. a rotation of the cam disc of 360 degrees.
- FIG. 1 the complete circuit of a motor drive according to the invention is shown.
- the left part shows the motor circuit with the motor Ml, a motor protection switch Ql, the motor contactor Kl, K2 and a heating resistor Rl.
- the right part shows the control circuits with the cam-controlled contacts S12, S13, S14, which are also available according to the prior art.
- a stepping switch relay K 20 The arrangement of a stepping switch relay K 20 is also already known. Furthermore, the cam-controlled monitoring contacts S15 and S16 additionally provided according to the invention are arranged in this part of the circuit. Further elements of the circuit are a push button switch S3 for manual actuation of the motor contactor Kl, K2, a flow contact S37, a closing contact S40 and the limit switches S4, S5, S6, and a blocking switch S8.
- the second cam-controlled monitoring contact S16 closes.
- the motor protection switch does not trip if it functions properly. In this switching step, it is checked by closing the monitoring contact S16 whether the motor contactor Kl, K2 and / or the stepping relay K20 are defective.
- K20 61-62 opens and interrupts the self-holding for K2.
- K2 is now only held via S12: N01-N02.
- the first cam-controlled monitoring contact S15 closes and thus checks whether K20 has tightened properly. Normally K2: 43-44 is closed and K20: 51-52 is open. The motor protection switch is not triggered if it functions properly.
- Monitoring contacts S15, S16 monitor the motor contactor Kl, K2 and the stepping relay K20. This takes place, as explained, in that the second monitoring contact S16 is closed by the cam disk at a time after the impulse is given and is opened again shortly thereafter, and the first monitoring contact S15 is also closed at a later point in time after activation of the step contactor K20 and opened again shortly thereafter becomes.
- This actuation is realized by correspondingly arranged switching cams on the cam disk.
- FIG. 1 This representation shows the entire changeover process of the tap changer, in which a complete rotation of the cam disk and a switching step indicator wheel connected to this cam disk occurs in the motor drive.
- the complete switching process is divided into 33 individual, sequential time steps, which are displayed in a known manner by a switching step indicator wheel.
- the short-time firing of the second monitoring switch S16 after the impulse is given, as well as the short-term firing of the first monitoring switch S15 at a later point in time after actuation of the step-by-step contactor K 20 by firing S13.
Landscapes
- Control Of Stepping Motors (AREA)
- Motor And Converter Starters (AREA)
- Valve Device For Special Equipments (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Fuel-Injection Apparatus (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19707548A DE19707548C1 (en) | 1997-02-26 | 1997-02-26 | Motorised drive e.g. for electric multiple-contact or stepping switch |
DE19707548 | 1997-02-26 | ||
PCT/EP1998/000091 WO1998038661A1 (en) | 1997-02-26 | 1998-01-09 | Motor drive |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0963593A1 true EP0963593A1 (en) | 1999-12-15 |
EP0963593B1 EP0963593B1 (en) | 2001-11-14 |
Family
ID=7821443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98904049A Expired - Lifetime EP0963593B1 (en) | 1997-02-26 | 1998-01-09 | Motor drive |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0963593B1 (en) |
JP (1) | JP2001512660A (en) |
AT (1) | ATE208955T1 (en) |
AU (1) | AU6208298A (en) |
BG (1) | BG63555B1 (en) |
BR (1) | BR9807609A (en) |
CZ (1) | CZ300299A3 (en) |
DE (2) | DE19707548C1 (en) |
ES (1) | ES2163250T3 (en) |
RO (1) | RO120162B1 (en) |
WO (1) | WO1998038661A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19918907B4 (en) * | 1999-04-26 | 2008-12-24 | Valeo Klimasysteme Gmbh | switching device |
DE19944461C1 (en) * | 1999-09-16 | 2001-01-11 | Siemens Ag | Monitoring method for electromagnetic switching device |
DE10016489C2 (en) * | 2000-04-01 | 2002-01-31 | Reinhausen Maschf Scheubeck | Method for controlling a motor drive for a tap changer and tap changer suitable for such a method |
US6839211B2 (en) | 2002-02-21 | 2005-01-04 | Broadcom Corporation | Methods and systems for reducing power-on failure of integrated circuits |
DE10222941C1 (en) * | 2002-05-24 | 2003-10-30 | Reinhausen Maschf Scheubeck | Motorized drive for electric stepping switch has additional cam switches operated by cam disc in control drive train for switching rotation direction of electric motor in load drive train |
UA84417C2 (en) * | 2003-04-03 | 2008-10-27 | Машиненфабрик Райнхаузен Гмбх | Multipoint switch (versions) |
DE102013107558A1 (en) | 2013-07-16 | 2015-01-22 | Maschinenfabrik Reinhausen Gmbh | OLTC |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2947769A1 (en) * | 1979-11-27 | 1981-07-23 | Transformatoren Union Ag, 7000 Stuttgart | Transformer tap changer drive control - has several rotationally independent tap changer switches, with single relay for both directions of rotation |
-
1997
- 1997-02-26 DE DE19707548A patent/DE19707548C1/en not_active Expired - Fee Related
-
1998
- 1998-01-09 RO RO99-00881A patent/RO120162B1/en unknown
- 1998-01-09 DE DE59802142T patent/DE59802142D1/en not_active Expired - Fee Related
- 1998-01-09 AU AU62082/98A patent/AU6208298A/en not_active Abandoned
- 1998-01-09 AT AT98904049T patent/ATE208955T1/en not_active IP Right Cessation
- 1998-01-09 JP JP53720698A patent/JP2001512660A/en active Pending
- 1998-01-09 EP EP98904049A patent/EP0963593B1/en not_active Expired - Lifetime
- 1998-01-09 ES ES98904049T patent/ES2163250T3/en not_active Expired - Lifetime
- 1998-01-09 CZ CZ993002A patent/CZ300299A3/en unknown
- 1998-01-09 WO PCT/EP1998/000091 patent/WO1998038661A1/en not_active Application Discontinuation
- 1998-01-09 BR BR9807609-4A patent/BR9807609A/en not_active IP Right Cessation
-
1999
- 1999-07-15 BG BG103581A patent/BG63555B1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9838661A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2163250T3 (en) | 2002-01-16 |
JP2001512660A (en) | 2001-08-21 |
BG103581A (en) | 2000-04-28 |
DE59802142D1 (en) | 2001-12-20 |
AU6208298A (en) | 1998-09-18 |
EP0963593B1 (en) | 2001-11-14 |
DE19707548C1 (en) | 1998-06-18 |
WO1998038661A1 (en) | 1998-09-03 |
ATE208955T1 (en) | 2001-11-15 |
CZ300299A3 (en) | 1999-12-15 |
BR9807609A (en) | 2000-02-22 |
BG63555B1 (en) | 2002-04-30 |
RO120162B1 (en) | 2005-09-30 |
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