SPRING-LOADED DRIVE FOR A HIGH-VOLTAGE POWER SWITCH AND METHOD FOR OPERATING THE SPRING-LOADED DRIVE

• US 20190333719A1
• Filed: 05/16/2017
• Published: 10/31/2019
• Est. Priority Date: 06/14/2016
• Status: Active Grant

• Current Assignee: Siemens Energy Global GmbH & Co. KG (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: HILKER, THOMAS
• Granted Patent: US 10,861,656 B2
• Time in Patent Office: Days
• CPC Class Codes: H01H 2003/266 having control circuits for motor operating switches, e.g. controlling the opening or closing speed of the contacts
• CPC Class Codes: H01H 3/26 using dynamo-electric motor for storing energy in a spring motor H01H3/30
• CPC Class Codes: H01H 3/3005 Charging means
• CPC Class Codes: H02M 7/217 using semiconductor devices only

Abstract

A spring-loaded drive for a high-voltage power switch contains at least one spring and at least one tensioning motor for the at least one spring. The spring-loaded drive contains at least one rectifier circuit, which is formed by a plurality of diodes where precisely one diode is connected in series to the tensioning motor.

Claims

1-10. -10. (canceled)

11. A spring-loaded drive for a high-voltage power switch, the spring-loaded drive comprising:

at least one spring;

at least one tensioning motor for said at least one spring; and

at least one rectifier circuit having precisely one diode connected in series with said tensioning motor.

12. The spring-loaded drive according to claim 11, wherein said one diode is a semiconductor diode.

13. The spring-loaded drive according to claim 11, wherein:

said tensioning motor has a housing; and

said one diode is in thermal contact with said housing for cooling said one diode by means of said housing.

14. The spring-loaded drive according to claim 13, wherein said one diode is disposed in said housing.

15. The spring-loaded drive according to claim 11, wherein said one diode is integrated in an electrical circuit of a motor voltage supply.

16. The spring-loaded drive according to claim 11, further comprising a bridge rectifier and said one diode is one of a plurality of diodes in said bridge rectifier, wherein only said one diode of said bridge rectifier is connected electrically in series with said tensioning motor.

17. The spring-loaded drive according to claim 11, wherein said one diode is formed from diode elements, connected in series and/or in parallel with one another, with a same forward direction.

18. The spring-loaded drive according to claim 11, wherein said tensioning motor is precisely one tensioning motor for DC voltage and AC voltage and/or a shunt-wound motor.

19. The spring-loaded drive according to claim 13, wherein said housing is a metal housing.

20. The spring-loaded drive according to claim 14, wherein said diode is directly and thermally conductively fastened to said housing.

21. The spring-loaded drive according to claim 16, wherein said bridge rectifier is in a form of a Graetz circuit.

22. The spring-loaded drive according to claim 11, further comprising a bridge rectifier and said one diode is one of a plurality of diodes in said bridge rectifier, wherein said one diode of said bridge rectifier is connected electrically in series with said tensioning motor, in such a way that, in a case of AC voltage, a half-wave of the AC voltage is applied to said tensioning motor by means of said one diode in a forward direction and said tensioning motor can be driven by the half-wave, and wherein, three of said diodes of said bridge rectifier are each connected in series with one another, in parallel with said one diode in series with said tensioning motor, and said three diodes are interconnected in such a way that no current flows across said three diodes.

23. A method for operating a spring-loaded drive, which comprises the steps of:

tensioning at least one spring by at least one tensioning motor for driving a high-voltage power switch; and

supplying the at least one tensioning motor with a voltage by means of a circuit having precisely one diode in series with the tensioning motor with a forward direction which has an effect that, in a case of AC voltage, a half-wave of the voltage is supplied to the tensioning motor for driving the tensioning motor and a current flow across the tensioning motor is blocked in a region of an other half-wave.

24. The method according to claim 23, which comprises using precisely one said tensioning motor for the tensioning of the at least one spring, the tensioning motor is operated with DC voltage and AC voltage.

25. The method according to claim 23, which comprises using precisely one said tensioning motor for the tensioning of the at least one spring, the tensioning motor is operated with DC voltage and AC voltage where the AC voltage is double a magnitude of the DC voltage with double power compared to power of the DC voltage.