CONTROL DEVICE FOR A POWER CONVERTER CIRCUIT

摘要

In DC/DC converter circuit, the peak value of the reactor current is found based on output voltage and an input voltage, thereby, the operation with the predetermined electric current mode is thereby enabled. The AC/DC converter circuit is run with a predetermined current mode, the power factor improvement is accomplished. The first control part 211 inputs a detected value of output voltage Eo, and a turn-off timing predicted value of switch Tr of the DC/DC converter 1 is calculated. The first control part 211 sends the calculation result to the switch drive signal generate part 213. The second control part 212 inputs the detected value of the output voltage and the input voltage, and it receives the turn-off timing predicted value from the first control part 211. Even more particularly, the second control part 212 calculates the peak value of the reactor current of the DC/DC converter 1 based on the turn-off timing predicted value, and it calculates the time that the reactor current decreases to a predetermined preset value from the peak value as a turn-on timing predicted value.

主权项

1. A control device of a power converter circuit having a DC/DC converter comprising a first control part, a second control part and a switch drive signal generation part:
wherein the first control part inputs a detected value of at least an output voltage, calculates a turn-off timing predicted value of a switch of the DC/DC converter based on the detected values, and sends a result of the calculation to a switch drive signal generation part; the second control part inputs the output voltage and a detected value of an input voltage at least, and receives a turn-off timing predicted value from the first control part, calculates a peak value of a reactor current of the DC/DC converter based on the detected values and the turn-off timing predicted value, calculates a time when the reactor current decreases to a predetermined preset value (the time when addition time was added: a turn-on timing predicted value) as the initial value, sends a result of the calculation to the switch drive signal generation part; the switch drive signal generation part receives the turn-off timing predicted value from the first control part and turns off the switch when the time reached the turn-off timing predicted value.