Spring-loaded drive for a high-voltage power switch and method for operating the spring-loaded drive
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.
1. 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
a bridge rectifier being in a form of a Graetz circuit and having a plurality of diodes, wherein only one diode of said plurality of diodes 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.
2. The spring-loaded drive according to claim 1 , wherein said one diode is a semiconductor diode.
3. The spring-loaded drive according to claim 1 , 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.
4. The spring-loaded drive according to claim 3 , wherein said one diode is disposed in said housing and said diode is directly and thermally conductively fastened to said housing.
5. The spring-loaded drive according to claim 1 , wherein said one diode is integrated in an electrical circuit of a motor voltage supply.
6. The spring-loaded drive according to claim 1 , wherein said one diode is formed from diode elements, connected in series and/or in parallel with one another, with a same forward direction.
7. The spring-loaded drive according to claim 1 , wherein said tensioning motor is precisely one tensioning motor for DC voltage and AC voltage and/or a shunt-wound motor.
8. The spring-loaded drive according to claim 3 , wherein said housing is a metal housing.
9. 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 bridge rectifier being in a form of a Graetz circuit and having a plurality of diodes, wherein only one diode of the plurality of diodes of the bridge rectifier is connected electrically in series with the at least one tensioning motor, in such a way that, in a case of AC voltage, a half-wave of the AC voltage is applied to the at least one tensioning motor by means of the one diode in a forward direction and the at least one tensioning motor can be driven by the half-wave, and wherein, three of the diodes of the bridge rectifier are each connected in series with one another, in parallel with the one diode in series with the at least one tensioning motor, and the three diodes are interconnected in such a way that no current flows across the three diodes.
10. The method according to claim 9 , 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.