Contactor having electronic coil control

Patent metadata

Field	Value
Publication number	US-10692675-B2
Application number	US-201715720235-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Oct 11, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

The disclosure relates to a contactor having electronic coil control for a magnet coil, the operation of keeping the pull-in power of the magnet coil constant being formed by current clocking, and having a safety-related output assembly of a programmable logic controller for the fault diagnosis of the contactor, the safety-related output assembly determining the flow of current flowing into the contactor and detecting a fault if a limit value is undershot and switching off. In the contactor disclosed herein, a connectable base load is integrated in the contactor.

First claim

The invention claimed is:

1. A contactor comprising:
an electronic coil control for a magnet coil, wherein the electronic coil control is configured to keep a pull-in power of the magnet coil constant by current clocking;
a safety-related output assembly of a programmable logic controller for fault diagnosis of the contactor, wherein the safety-related output assembly is configured to determine a flow of current into the contactor, detect a fault when a limit value is undershot, and switch off; and
a connectable base load integrated in the contactor.

2. The contactor of claim 1 , wherein the connectable base load is connected in a start-up phase of the contactor when current is not flowing through the magnet coil.

3. The contactor of claim 2 , wherein the connectable base load is connected in pause times of the current clocking for the magnet coil.

4. The contactor of claim 3 , further comprising:
a switch connected in series with the connectable base load.

5. The contactor of claim 4 , wherein a signal specifying a clock for the electronic coil control is impressed on the switch in an inverted manner.

6. The contactor of claim 5 , further comprising:
a time control integrated in the contactor.

7. The contactor of claim 6 , wherein an active phase of the time control is restricted to a pull-in process of the contactor.

8. The contactor of claim 1 , wherein the connectable base load is connected in pause times of the current clocking for the magnet coil.

9. The contactor of claim 8 , further comprising:
a switch connected in series with the connectable base load.

10. The contactor of claim 9 , wherein a signal specifying a clock for the electronic coil control is impressed on the switch in an inverted manner.

11. The contactor of claim 10 , further comprising:
a time control integrated in the contactor.

12. The contactor of claim 11 , wherein an active phase of the time control is restricted to a pull-in process of the contactor.

13. The contactor of claim 1 , further comprising:
a switch connected in series with the connectable base load.

14. The contactor of claim 13 , wherein a signal specifying a clock for the electronic coil control is impressed on the switch in an inverted manner.

15. The contactor of claim 14 , further comprising:
a time control integrated in the contactor.

16. The contactor of claim 15 , wherein an active phase of the time control is restricted to a pull-in process of the contactor.

17. The contactor of claim 1 , further comprising:
a time control integrated in the contactor.

18. The contactor of claim 17 , wherein an active phase of the time control is restricted to a pull-in process of the contactor.

Assignees

• Oppermann Christian
• Streich Bernhard
• Siemens Ag

Inventors

• Oppermann Christian
• Streich Bernhard

Classifications

• H01H47/002

  Monitoring or fail-safe circuits · CPC title

• H03K17/28

  Modifications for introducing a time delay before switching (modifications to provide a choice of time-intervals for executing more than one switching action H03K17/296) · CPC title

• H01H47/325 Primary

  by switching regulator · CPC title

• H01H47/04

  for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current {(with switching regulator H01H47/325)} · CPC title

• G05F1/561 Primary

  Voltage to current converters (amplifiers H03F) · CPC title