Patent ID: 11863076
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The control device according to claim 3, comprising a micro-controller, a time delay circuit, a triode, a first resistor, a second resistor, a first capacitor and a pulse width modulation chip, wherein:
the micro-controller changes an output voltage at an output thereof according to the comparison result between the load percentage of the isolated converter and the preset threshold;
the output of the micro-controller is connected to a base electrode of the triode via the time delay circuit;
an emitting electrode of the triode is grounded;
a collecting electrode of the triode is connected to a first pin of the pulse width modulation chip through the first resistor;
a node between the first pin and the first resistor is grounded through the second resistor;
a second pin of the pulse width modulation chip is grounded through the first capacitor;
an output of the pulse width modulation chip is connected to the switching transistor of the isolated converter to adjust the switching frequency of the switching transistor; and
the time delay circuit is used to realize the direct increase and gradual decrease of an output frequency of the pulse width modulation chip.