Converter device

A converter device for converting alternating current power supplied from an alternating current power supply into direct current power, and outputting the direct current power to a load, the converter device comprising:

• a rectification circuit to receive the alternating current power from the alternating current power supply as an input, and to perform full-wave rectification on the alternating current power received;
• a booster circuit to boost an output voltage from the rectification circuit;
• a smoothing capacitor to smooth an output voltage from the booster circuit, and to output the voltage smoothed, to the load;
• a controller to control the booster circuit, and
• a phase detection section to detect a phase of a voltage applied by the alternating current power supply, wherein
• the booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a reverse-blocking diode, and
• the controller turns on the switching element when the phase of the voltage applied by the alternating current power supply reaches a predetermined value to determine the presence or absence of a fault of the booster section.

A converter device for converting alternating current power supplied from an alternating current power supply into direct current power, and outputting the direct current power to a load, the converter device comprising:

• a rectification circuit to receive the alternating current power from the alternating current power supply as an input, and to perform full-wave rectification on the alternating current power received;
• a booster circuit to boost an output voltage from the rectification circuit;
• a smoothing capacitor to smooth an output voltage from the booster circuit, and to output the voltage smoothed, to the load;
• a controller to control the booster circuit, and
• a supply voltage detector to detect an instantaneous value of a voltage applied by the alternating current power supply, wherein
• the booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a reverse-blocking diode, and
• the controller turns on the switching element when the instantaneous value of the voltage applied by the alternating current power supply reaches a predetermined value to determine the presence or absence of a fault of the booster section.

A converter device for converting alternating current power supplied from an alternating current power supply into direct current power, and outputting the direct current power to a load, the converter device comprising:

• a rectification circuit to receive the alternating current power from the alternating current power supply as an input, and to perform full-wave rectification on the alternating current power received;
• a booster circuit to boost an output voltage from the rectification circuit;
• a smoothing capacitor to smooth an output voltage from the booster circuit, and to output the voltage smoothed, to the load;
• a controller to control the booster circuit, and
• a bus current detector to detect a current flowing to the rectification circuit, wherein
• the booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a reverse-blocking diode, and
• the controller maintains, in an “on” state, the switching element included in at least one of the plurality of booster sections for a predetermined time period to determine presence or absence of a fault of the at least one of the booster sections, and performs, on bus current information detected by the bus current detector, a low-pass filtering operation based on a first time constant, or no low-pass filtering operation based on the first time constant, for detecting a fault of the booster section, and a low-pass filtering operation based on a second time constant larger than the first time constant, for power factor regulation control.

A converter device for converting alternating current power supplied from an alternating current power supply into direct current power, and outputting the direct current power to a load, the converter device comprising:

• a rectification circuit to receive the alternating current power from the alternating current power supply as an input, and to perform full-wave rectification on the alternating current power received;
• a booster circuit to boost an output voltage from the rectification circuit;
• a smoothing capacitor to smooth an output voltage from the booster circuit, and to output the voltage smoothed, to the load;
• a controller to control the booster circuit, and
• wherein
• the converter device includes a bus voltage detection circuit to detect a voltage applied to the smoothing capacitor,
• the booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a MOSFET that is a metal oxide semiconductor field effect transistor, and
• the controller turns on both of the switching element in the at least one of the plurality of booster sections and the MOSFET, and compares the bus voltages detected by the bus voltage detection circuit before and after the turning on to determine the presence or absence of a fault of the at least one of the booster sections.

A converter device for converting alternating current power supplied from an alternating current power supply into direct current power, and outputting the direct current power to a load, the converter device comprising:

• a rectification circuit to receive the alternating current power from the alternating current power supply as an input, and to perform full-wave rectification on the alternating current power received;
• a booster circuit to boost an output voltage from the rectification circuit;
• a smoothing capacitor to smooth an output voltage from the booster circuit, and to output the voltage smoothed, to the load;
• a controller to control the booster circuit, and
• wherein
• the booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a MOSFET that is a metal oxide semiconductor field effect transistor, and
• the controller turns on both of the switching element in the at least one of the plurality of booster sections and the MOSFET, and compares the amount of current detected by a current detector that detects a total amount of currents flowing through the switching elements in the plurality of booster sections during the “on” state with a fault determination threshold to determine the presence or absence of a fault of the at least one of the booster sections.