DE10354592B3 - Induction drive for a disconnector and / or earthing switch - Google Patents

Abstract

An induction drive is proposed for a disconnector and / or earthing switch, the contacting elements of which are arranged in a switching chamber housing (1) can be driven via an insulating shaft (12), the insulating shaft (12) being directly connected to a rotor shaft (20) of a torque motor (7). is connected, whose rotor (19) with permanent magnets (21) is provided and whose stator winding (18) on the drive housing (13) is fixed, which is connected to the switching chamber housing (1).

Description

The The invention relates to an induction drive for a Isolating and / or earthing switch according to the preamble of the claim 1. The invention can be used, for example, in combined high-voltage separation and earthing switches are used.

From the DE 36 08 481 A1 a drive device for an electrical circuit breaker is known, which has a rotatably mounted spindle which is drivingly coupled to the movable contact piece of the circuit breaker, so that the movable contact piece is actuated upon rotation of the spindle. On the spindle, a gear is mounted, which meshes with a coupled with an electric motor drive gear drive to its rotation and thus to actuate the movable contact piece. The spindle is also rotatable with a hand crank. To simplify this manual operation and to ensure the coupling of the gear to the gear drive with the hand crank, the gear between two positions on the spindle of the crank is displaceable, wherein it meshes with the gear drive in the first position and is free in the second position of the gear drive , Between the hand crank and the spindle controllable locking elements are provided.

From the DE 41 42 548 C2 is a drive for a circuit breaker with a driven by a motor or by hand and acting on the switch drive shaft be known, with a designed as a worm gear, force is transmitted from the engine to the drive shaft transmitting gear transmission.

From the DE 195 34 392 AS1 For example, a drive for the movable contact piece of a disconnecting earthing switch is known, wherein the contact piece drive shaft is coupled to a drive disk provided with two radial slots forming a V-shape. There are two mutually parallel and linearly displaceable drive elements are provided, each engaging in one of the slots and pivot the drive elements from the central position to the first and second positions. The drive elements can be formed by screwed onto each driven by a motor threaded spindle Rollenmitnehmer with a bolt projection, which engages in each case in the associated slot.

From the DE 38 02 394 A1 For example, a combined high voltage disconnecting and earthing switch is known wherein a driving device with a threaded spindle, a traveling nut and a motor moves a longitudinally displaceable switching rod up and down.

Also torque motors for a direct drive are well known. For example, from the DE 102 10 071 A1 a torque motor with an annular rotor and an annular stator has become known, which has stator segments which are detachably connected to a stator frame. In this way, a particularly easy repair of the electrical windings is to be made possible.

Another drive is from the US 4,912,380 has become known, which is suitable for a multi-phase switch, which is connected via a coupling for limiting the torque and a shaft with a switch shaft. However, such a drive is unsuitable for driving a single-phase disconnector and / or earthing switch.

Of the Invention is based on the object, an induction drive for a Separating and / or Specify earthing switch in optimized version.

These The object is achieved in conjunction with the features of the preamble according to the invention solved specified in the characterizing part of claim 1 features.

The particular advantages of the invention are that the induction motor used is a standard motor, which is considerable Has cost advantages. As a result of using a torque motor the Rotor shaft of the motor and the insulating shaft for the switching device directly interconnected, is a direct and very accurate positioning possible. There is no gear between drive and output required, so that results in high efficiency and considerable cost advantages. Since the torque motor is provided with permanent magnets, results As a result, without further assistance, a magnetic lock the set shift position. Overall, the secondary technical Requirements directly over the positionally accurate control of the concentric induction drive be issued so that no Secondary module in the proper sense is needed. Only the electronic components Be useful in one secondary technology summarized.

Further Advantages will be apparent from the following description.

advantageous Embodiments of the invention are characterized in the subclaims.

The Invention will be described below with reference to the drawing Embodiments explained. It demonstrate:

1 a view of a direct drive with concentric induction drive,

2 a lateral section through a direct drive with concentric induction drive.

In 1 is a view of a provided for driving a switching device direct drive with concentric induction drive shown. The direct drive is used to drive a disconnector and / or earthing switch. It is a complete drive unit 2 , consisting of a direct drive 3 and a secondary technique 4 to recognize, with the drive housing of the direct drive and the secondary technology 4 via an interface 14 connected to each other. A position indicator 9 to indicate the current position of the disconnector and / or earthing switch can either direct drive 3 or at the secondary technique 4 be provided. The secondary technique 4 conveniently contains the control and monitoring technology and the control / regulation / control electronics. If necessary, an actuation of the drive unit 2 with a manual drive 5 respectively. The secondary technique 4 has a connector 16 for connection to a higher-level control technology.

In 2 is a side section through a direct drive with concentric induction drive shown. Central component of the direct drive 3 is a torque motor 7 ring-shaped geometry as a concentric induction drive with stator winding 18 , Rotor 19 with rotor shaft 20 and on the rotor 19 fixed permanent magnets 21 ,

Advantageously, the torque motor generates 7 large torques at very low speeds, so that gear transmission links can be completely eliminated. The torque motor 7 has very good control properties, is compact, robust, maintenance-free, wear-free, backlash-free, quiet and inexpensive. The torque that can be generated depends on the diameter and length of the motor. According to the requirements of the switching device, in particular stroke, torque and self-holding force, the appropriate torque motor (standard motor) is determined and used. Via the control of the stator winding 18 a corresponding precise "electronic adjustment" of the engine values of the concentric induction drive to these requirements of the switching device can take place.

The torque motor 7 has a drive housing 13 on which a flange 17 on the wall of the switching chamber housing 1 the disconnector and / or earthing switch is attached. The drive housing 13 is with a cover 15 provided, which openings for the rotor shaft 20 for the realization of the position indicator 9 and the manual drive 5 having.

The rotor shaft 20 is through the wall of the switching chamber housing 1 in the interior of the switching chamber housing 1 led, with a storage 11 the desired low-wear and low-friction rotational movements of the rotor shaft 20 allows. In the interior of the switching chamber housing 1 is the rotor shaft 20 with an insulating shaft (drive shaft) 12 connected, which for actuating the electrical contacting elements of the switching chamber housing 1 located disconnector and / or earthing switch is used and realizes the required potential separation. The other end of the rotor shaft 20 breaks through the cover 15 and press the position indicator 9 ,

For the realization of the manual drive, the rotor 19 a gear consisting of an internally toothed ring gear and a toothed wheel 6 on, wherein the gear via an axis with a first bevel gear of an angular gear 10 connected is.

The second bevel gear of this angular gear 10 is via an axle and an overload clutch 8th with the aforementioned, outside of the drive housing 13 accessible manual drive 5 connected.

Also if in the embodiment the drive for a disconnector and earthing switch is used, it is in the same Way possible, the drive also for a circuit breaker or for to insert a grounding switch.

1

Switching chamber housing

2

drive unit

3

direct drive

4

secondary technology

5

hand drive

6

transmission with sprocket (internal teeth) and gear

7

torque motor

8th

Overload clutch

9

position indicator

10

angle gear (Exit to manual drive)

11

storage

12

insulating shaft

13

drive housing

14

interface drive housing and secondary technology

15

cover

16

connector

17

flange

18

stator winding

19

rotor

20

rotor shaft

21

permanent magnets

Claims (9)

Induction drive for a disconnector and / or earthing switch, which in a switching chamber housing ( 1 ) arranged contacting elements via an insulating shaft ( 12 ), characterized in that the insulating shaft ( 12 ) directly with a rotor shaft ( 20 ) of a torque motor ( 7 ) whose rotor ( 19 ) with permanent magnets ( 21 ) and its stator winding ( 18 ) on the drive housing ( 13 ) which is connected to the switching chamber housing ( 1 ) connected is. Induction drive according to claim 1, characterized in that the switching chamber housing ( 1 ) a storage ( 11 ) for the rotor shaft ( 20 ) having. Induction drive according to claim 1 and / or 2, characterized in that the drive housing ( 13 ) a flange ( 17 ) for mounting on the switching chamber housing ( 1 ) having. Induction drive according to one of the preceding claims, characterized in that the drive housing ( 13 ) with a cover ( 15 ) is provided. Induction drive according to claim 4, characterized in that the rotor shaft ( 20 ) the cover ( 15 ) and a position indicator ( 9 ). Induction drive according to one of the preceding claims, characterized in that a manual drive ( 5 ) via a bevel gear ( 10 ) and another gear ( 6 ) on the rotor ( 19 ) of the torque motor ( 7 ) acts. Induction drive according to claim 6, characterized in that the rotor ( 19 ) an internally toothed ring gear to form the further transmission ( 6 ) having. Induction drive according to Claim 6 or 7, characterized in that the manual drive ( 5 ) with an overload clutch ( 8th ) is provided. Induction drive according to one of the preceding claims, characterized in that the torque motor ( 7 ) Part of a direct drive ( 3 ), which via an interface ( 14 ) with a secondary technique ( 4 ) connected is.