Method for actuating a converter, control apparatus for a converter, and converter
AssigneeRobert Bosch GmbH
InventorsFlorian Malchow, Michele Hirsch, Tino Merkel
Life of this patent
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Abstract
The present invention relates to a variation of the clock frequency for pulse-width-modulated actuation of an electrical converter. In this context, the clock frequency can be specifically lowered in an angle range of an electrical period of an AC current to be output. The specific lowering of the clock frequency during predetermined angle ranges of the electrical period allows the load on the switching elements in the converter to be adjusted. As a result, it is possible, by way of example, to adjust the temperature distribution or thermal load in the converter.
Claims7
A method for actuating a pulse-width-modulated (PWM) electrical converter, the method comprising:
- actuating the PWM electrical converter at a first predetermined clock frequency in a first angle range of an electrical period of a current to be output by the PWM electrical converter;
- actuating the PWM electrical converter at a second predetermined clock frequency in a second angle range of the electrical period of the current to be output by the PWM electrical converter;
- detecting a temperature and/or a temperature distribution in the PWM electrical converter;
- and
- setting the first angle range and the second angle range depending on an ascertained temperature and/or temperature distribution in the PWM electrical converter.
A control apparatus for a pulse-width-modulated (PWM) electrical converter, the control apparatus comprising:
- a control device configured to provide a control signal for pulse-width-modulated actuation of the PWM electrical converter, wherein the control device is configured to
- provide the actuation signal in a first angle range of an electrical period of a current to be output by the PWM electrical converter depending on a first predetermined clock frequency;
- and to
- provide the actuation signal in a second angle range of the electrical period of the current to be output by the PWM electrical converter depending on a second predetermined clock frequency, and
- a temperature determination device configured to ascertain a temperature and/or a temperature distribution in the PWM electrical converter,
- wherein the control device is configured to set the first angle range and the second angle range depending on an ascertained temperature and/or temperature distribution.
Dependencies are inferred from the claim text.