| 摘要 |
A power source apparatus includes: a first series circuit that has a first rectifier element, a first switching element, and a third rectifier element; a second series circuit that has a second rectifier element, a second switching element, and a fourth rectifier element; a reactor connected between a connecting point of the first rectifier element and the first switching element and a connecting point of the second rectifier element and the second switching element; and a current detection unit having a first resistor element. The first and second switching elements are controllable based on a first zero current detection signal in accordance with a first current detected in the current detection unit, and a desired direct current voltage is fed to a load circuit. |
| 主权项 |
1. A power source apparatus comprising:
a power factor correction circuit comprising: a first series circuit that consists of a first rectifier element, a first switching element, and a third rectifier element, a second series circuit that consists of a second rectifier element, a second switching element, and a fourth rectifier element, and is connected in parallel to the first series circuit, a smoothing capacitor that is connected in parallel to the first and second series circuits and a load circuit, and a reactor, one end of which is connected to a connecting point between the first rectifier element and the first switching element and the other end of which is connected to a connecting point between the second rectifier element and the second switching element; and a control circuit unit that inputs an alternating current voltage of an AC power source and an output voltage output to the load circuit, and controls a switching operation of at least the first and second switching elements; wherein one end of the AC power source is connected to a connecting point between the first switching element and the third rectifier element and the other end of the AC power source is connected to a connecting point between the second switching element and the fourth rectifier element; wherein the power source apparatus further comprises:
an AC polarity detection unit that detects a positive/negative polarity of the AC power source; anda current detection unit that detects a first current flowing between a connecting point of the third rectifier element and the fourth rectifier element and a ground, or detects a second current flowing to the third rectifier element and a third current flowing to the fourth rectifier element;wherein the control circuit unit controls the first and second switching elements based on a first zero current detection signal output from the current detection unit in accordance with the first current or based on second and third zero current detection signals output from the current detection unit in accordance with the second and third currents, and feeds a desired direct current voltage to the load circuit. |
