CONVERTER

The present invention has an object of obtaining a converter which is capable of suppressing an instant voltage variation and outputting a desired DC power with a high precision. There are provided a power conversion unit (11) that conducts power conversion on a supplied power, a smoothing filter (12) that smoothes the power that has been converted in power, a voltage detector (8) that detects a voltage of the smoothed power, and a control unit (17) that outputs a pulse signal for controlling a conduction ratio of a switching element within the power conversion unit (11) so that an output voltage from the voltage detector (8) becomes a desired voltage value. The control unit (17) temporarily stops the power supply when the output voltage increases up to a first given voltage, so that an output voltage from the voltage detector (8) does not become too much higher than a desired voltage value, and restarts the power supply when the output voltage decreases down to a second given voltage, so that the output voltage from the voltage detector (8) dose not become too much lower than the desired voltage value during the power supply stop.