Matrix converter having a plurality of bidirectional switches for a commutation operation and control method therefor
First Claim
1. A matrix converter, comprising:
- a power converter comprising;
a plurality of bidirectional switches;
a plurality of input terminals configured to be connected to phases of an AC power source; and
a plurality of output terminals configured to be connected to phases of a load;
wherein the plurality of bidirectional switches connect the plurality of input terminals and the plurality of output terminals to each other;
a commutation controller configured to perform one of a three-step commutation operation and a four-step commutation operation by the plurality of bidirectional switches as a switch source and the plurality of bidirectional switches as a switch destination when the plurality of input terminals to be connected to the plurality of output terminals are switched by on/off control of the plurality of bidirectional switches; and
a compensator configured to compensate for an output voltage error generated when the plurality of input terminals to be connected to the plurality of output terminals are switched, based on at least;
a potential difference between a voltage at the plurality of input terminals before switching and a voltage at the plurality of output terminals after switching of the plurality of input terminals to be connected to the plurality of output terminals,an output current of the plurality of output terminals, andcapacitance between input and output terminals of unidirectional switches included in the plurality of bidirectional switches.
1 Assignment
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Accused Products
Abstract
Provided is a matrix converter including a power converter, a commutation controller, and a compensator. The power converter includes a plurality of bidirectional switches. The commutation controller performs one of a three-step commutation operation and a four-step commutation operation by the bidirectional switches as a switch source and the bidirectional switches as a switch destination when an input terminal to be connected to an output terminal is switched by on/off control of the bidirectional switches. The compensator compensates for an output voltage error generated when the input terminal to be connected to the output terminal is switched, based on a potential difference before and after the switching of the input terminal to be connected to the output terminal, an output current of the output terminal, and capacitance between input and output terminals of unidirectional switches.
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Citations
13 Claims
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1. A matrix converter, comprising:
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a power converter comprising; a plurality of bidirectional switches; a plurality of input terminals configured to be connected to phases of an AC power source; and a plurality of output terminals configured to be connected to phases of a load; wherein the plurality of bidirectional switches connect the plurality of input terminals and the plurality of output terminals to each other; a commutation controller configured to perform one of a three-step commutation operation and a four-step commutation operation by the plurality of bidirectional switches as a switch source and the plurality of bidirectional switches as a switch destination when the plurality of input terminals to be connected to the plurality of output terminals are switched by on/off control of the plurality of bidirectional switches; and a compensator configured to compensate for an output voltage error generated when the plurality of input terminals to be connected to the plurality of output terminals are switched, based on at least; a potential difference between a voltage at the plurality of input terminals before switching and a voltage at the plurality of output terminals after switching of the plurality of input terminals to be connected to the plurality of output terminals, an output current of the plurality of output terminals, and capacitance between input and output terminals of unidirectional switches included in the plurality of bidirectional switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A matrix converter, comprising:
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power converting means comprising; a plurality of bidirectional switches a plurality of input terminals configured to be connected to phases of an AC power source and a plurality of output terminals configured to be connected to phases of a load, wherein the plurality of bidirectional switches connect the plurality of input terminals and the plurality of output terminals to each other; commutation controlling means configured to perform one of a three-step commutation operation and a four-step commutation operation by the plurality of bidirectional switches as a switch source and the plurality of bidirectional switches as a switch destination when the plurality of input terminals to be connected to the plurality of output terminals are switched by on/off control of the plurality of bidirectional switches; and compensating means configured to compensate for an output voltage error generated when the plurality of input terminals to be connected to the plurality of output terminals are switched, based on at least; a potential difference between a voltage at the plurality of input terminals before switching and a voltage at the plurality of output terminals after switching of the plurality of input terminals to be connected to the plurality of output terminals, an output current of the plurality of output terminals, and capacitance between input and output terminals of unidirectional switches included in the plurality of bidirectional switches.
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13. A method of controlling a matrix converter,
the matrix converter comprising: -
power converting means comprising; a plurality of bidirectional switches a plurality of input terminals configured to be connected to phases of an AC power source and, a plurality of output terminals configured to be connected to phases of a load, wherein the plurality of bidirectional switches connect the plurality of input terminals and the plurality of output terminals to each other; the method comprising; performing one of a three-step commutation operation and a four-step commutation operation by the plurality of bidirectional switches as a switch source and the plurality of bidirectional switches as a switch destination when the plurality of input terminals to be connected to the plurality of output terminals are switched by on/off control of the plurality of bidirectional switches; and compensating for an output voltage error generated when the plurality of input terminals to be connected to the plurality of output terminals are switched, based on at least; a potential difference between a voltage at the plurality of input terminals before switching and a voltage at the plurality of output terminals after switching of the plurality of input terminals to be connected to the plurality of output terminals, an output current of the plurality of output terminals, and capacitance between input and output terminals of unidirectional switches included in the plurality of bidirectional switches.
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Specification