MATRIX CONVERTER, MATRIX CONVERTER CONTROL DEVICE AND MATRIX CONVERTER CONTROL METHOD
First Claim
1. A matrix converter, comprising:
- a power converter including a plurality of bidirectional switches provided between respective phases of an AC power source and respective phases of a load;
a selector configured to select one commutation pattern from a plurality of commutation patterns based on a state of a phase voltage of the AC power source and a state of a phase current of the load;
a commutation controller configured to perform commutation control by controlling the bidirectional switches pursuant to the commutation pattern selected by the selector to switch a connection state of the AC power source and the load;
a determinator configured to determine a power loss generated by the commutation control in the bidirectional switches; and
a condition changer configured to change the commutation patterns which become a selection target of the selector or a selection condition of the commutation patterns which become the selection target of the selector, based on the power loss determined by the determinator.
1 Assignment
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Accused Products
Abstract
A matrix converter includes a selector, a commutation controller, a determinator, and a condition changer. The selector selects one commutation pattern from plurality of commutation patterns based on a state of a phase voltage of a AC power source and a state of a phase current of a load. The commutation controller performs commutation control by controlling bidirectional switches pursuant to the commutation pattern selected by the selector to switch a connection state of the AC power source and the load. The determinator determines a power loss generated by the commutation control in the bidirectional switches. The condition changer changes the commutation patterns which become a selection target of the selector or a selection condition of the commutation patterns which become the selection target of the selector, based on the power loss determined by the determinator.
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Citations
12 Claims
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1. A matrix converter, comprising:
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a power converter including a plurality of bidirectional switches provided between respective phases of an AC power source and respective phases of a load; a selector configured to select one commutation pattern from a plurality of commutation patterns based on a state of a phase voltage of the AC power source and a state of a phase current of the load; a commutation controller configured to perform commutation control by controlling the bidirectional switches pursuant to the commutation pattern selected by the selector to switch a connection state of the AC power source and the load; a determinator configured to determine a power loss generated by the commutation control in the bidirectional switches; and a condition changer configured to change the commutation patterns which become a selection target of the selector or a selection condition of the commutation patterns which become the selection target of the selector, based on the power loss determined by the determinator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A matrix converter control device, comprising:
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a selector configured to select one commutation pattern from plurality of commutation patterns based on states of respective phases of an AC power source and respective phases of a load which are connected to each other via a power converter having a plurality of bidirectional switches; a commutation controller configured to perform commutation control by controlling the bidirectional switches pursuant to the commutation pattern selected by the selector to switch a connection state of the AC power source and the load; a determinator configured to determine a power loss generated by the commutation control in the bidirectional switches; and a condition changer configured to change the commutation patterns which become a selection target of the selector or a selection condition of the commutation patterns which become the selection target of the selector, based on the power loss determined by the determinator.
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12. A matrix converter control method, comprising:
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selecting one commutation pattern from plurality of commutation patterns based on states of respective phases of an AC power source and respective phases of a load which are connected to each other via a power converter having a plurality of bidirectional switches; performing commutation control by controlling the bidirectional switches pursuant to the commutation pattern selected in said selecting to switch a connection state of the AC power source and the load; determining a power loss generated by the commutation control in the bidirectional switches; and changing the commutation patterns which become a selection target in said selecting or a selection condition of the commutation patterns which become the selection target in said selecting, based on the power loss determined in said determining.
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Specification