High frequency, voltage feedback control mode power converter

• US 6,356,463 B1
• Filed: 02/07/2001
• Issued: 03/12/2002
• Est. Priority Date: 02/07/2001
• Status: Expired due to Term

• Current Assignee: Eaton Phoenixtec MMPL Co. Ltd. (Eaton Corporation PLC.)
• Original Assignee: Eaton Phoenixtec MMPL Co. Ltd. (Eaton Corporation PLC.)
• Inventors: Tsai, Chia-Ming
• Primary Examiner(s): STERRETT, JEFFREY L
• Application Number:
  US09/778,638
• Time in Patent Office: 398 Days
• Field of Search: 363/71, 363/26, 363/41, 363/97, 363/98, 363/132, 363/134
• US Class Current: 363/17
• CPC Class Codes: H02M 1/0012 Control circuits using digital or numerical techniques in DC/DC converters H02M3/157, H02M3/33515; in DC-AC converters H02M7/53873
• CPC Class Codes: H02M 3/3376 with automatic control of output voltage or current

Abstract

A high frequency, voltage feedback control mode power converter having a microprocessor outputs a control clock signal and a simulated output voltage to control the dead-time value of a PWM controller. The control clock signal is decided by an input interrupt process program and an output interrupt process program written in the microprocessor. By appropriately providing the control clock signal for controlling the dead-time value of the PWM controller, the efficiency of the high frequency, voltage feedback control mode power converter is raised and an output steady response is also improved.

Claims

1. A high frequency, voltage feedback control mode power converter comprising:

a power supply unit;

an active drive unit connected to the power supply unit;

a power converter connected to the active drive unit for power converting;

an output unit connected to the power converter;

a PWM controller connected to the active drive unit for outputting a signal to control the active unit to be selectively activated; and

a microprocessor connected to the power supply unit, the output unit and the PWM controller, wherein the microprocessor respectively receives an output voltage and input voltage from the output unit and the power supply unit for processing by an output interrupt process program and an input interrupt process program so as to output a control clock signal to control a dead-time value of the PWM controller.

2. The high frequency, voltage feedback control mode power converter as claimed in claim 1, the high frequency, voltage feedback control mode power converter further comprising:

an input voltage reducing unit connected between the power supply unit and the microprocessor for providing a proportionally reduced input voltage to the microprocessor; and

an output voltage reducing unit connected between the output unit and the microprocessor for providing a proportionally reduced output voltage to the microprocessor.

3. The high frequency, voltage feedback control mode power converter as claimed in claim 2, wherein the active drive unit is a pulse transformer.

4. The high frequency, voltage feedback control mode power converter as claimed in claim 2, wherein the power converter is a full-bridge converter.

5. The high frequency, voltage feedback control mode power converter as claimed in claim 4, wherein the active drive unit is a pulse transformer.

6. The high frequency, voltage feedback control mode power converter as claimed in claim 1, wherein the active drive unit is a pulse transformer.