PWM control for electromagnetic valves

US10804817B2 · kind B2 · utility

Assignee

• BUERKERT WERKE Gmbh & CO. KG · DE

Inventors

• Markus Feinauer · Langenburg, DE
• Simon Kastner · Ingelfingen, DE
• Dinko Begovic · Ingelfingen, DE
• Sebastian Frank · Tailfingen, DE

Key dates

• Filing date: Jun 6, 2019
• Grant date: Oct 13, 2020
• Expiry date: Jun 6, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D16/2013
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A circuit and a method of controlling a circuit is provided for an electronic control of an electromagnetic drive of an electromagnetic valve. The circuit provides a control signal for the electromagnetic drive which has a high level and a low level. The control signal comprises at least a first time interval having a first duty cycle, an optional second time interval having a second duty cycle, and a third time interval having a third duty cycle, the first, second and third duty cycles being less than one. The first duty cycle is greater than the second duty cycle and the second duty cycle is greater than the third duty cycle. The time length of the time intervals and the size of the duty cycles are configured such that the electromagnetic drive changes from a first operating state to a second operating state in the first time interval, optionally remains in the second operating state in the second time interval, and changes from the second operating state to the first operating state in the third time interval.