Power device

A power device, comprising:

• a power source;
• a load configured to be driven by power supplied from the power source;
• and
• a voltage control unit configured to control a voltage to be applied to the load, the voltage control unit comprising:
• a first reactor and a second reactor;
• a plurality of switches;
• a first capacitor and a second capacitor;
• and
• a first step-up circuit and a second step-up circuit,
• a positive electrode of the power source being connected with a first node,
• a negative electrode of the power source being connected with a second node,
• a first end of the first reactor being connected with a third node and a second end of the first reactor being connected with the first node,
• a first end of the second reactor being connected with a fourth node and a second end of the second reactor being connected with the second node,
• a first end of the first capacitor being connected with a fifth node and a second end of the first capacitor being connected with the second node,
• a first end of the second capacitor being connected with a sixth node and a second end of the second capacitor being connected with the first node,
• the switches comprising:
• a first switch, a first end of the first switch being connected with the fifth node and a second end of the first switch being connected with the third node;
• a second switch, a first end of the second switch being connected with the third node and a second end of the second switch being connected with the second node;
• a third switch, a first end of the third switch being connected with the first node and a second end of the third switch being connected with the fourth node;
• and
• a fourth switch, a first end of the fourth switch being connected with the fourth node and a second end of the fourth switch being connected with the sixth node,
• the first step-up circuit comprising the first reactor, the first capacitor, and the first and second switches, the first step-up circuit being connected with the power source;
• the second step-up circuit comprising the second reactor, the second capacitor, and the third and fourth switches, the second step-up circuit being connected with the power source;
• and
• the voltage control unit being configured to control the voltage applied to the load to be an arbitrary voltage, which is equal to or more than the voltage of the power source, based on a duty of ON and OFF switching operation of the switch.