Motor driving apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTatsuya Okuda, Takahiro Urakabe, Yuuji Kuramoto
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Abstract
A motor driving apparatus is provided which can minimize ripple current flowing through a DC link capacitor, and downsize the motor driving apparatus. It synchronizes the frequency of the inverter carrier signal for driving an inverter with the frequency of the DC/DC converter carrier signal for driving a DC/DC converter, and carries out control in such a manner that the center of a period during which the input current of the inverter is zero and the center of a period during which the output current of the DC/DC converter is zero are matched.
Claims17
A motor driving apparatus comprising:
- a power supply;
- a DC/DC converter connected to said power supply;
- an inverter connected to said DC/DC converter;
- a DC link capacitor connected between said inverter and said DC/DC converter for smoothing a voltage;
- and
- a control circuit for controlling power supply from said DC/DC converter to said inverter in a manner that a period in which output current of said DC/DC converter becomes zero takes place in a period during which an input current to said inverter is zero.
Dependencies are inferred from the claim text.