Ac-to-ac power converter without a dc link capacitor
First Claim
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1. Power conversion apparatus comprising:
- a source-side inverter;
a drive-side inverter;
a dc current link coupled between an output of the source-side inverter and an input of the drive-side inverter; and
a controller for operating the source-side inverter in current mode and the drive-side inverter in a commutation mode.
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Abstract
An ac-to-ac power converter includes a source-side inverter that is operated in current mode and a drive side inverter that is operated in commutation mode. The source side inverter performs current regulation during a first portion of each modulating cycle and space vector modulation during a second portion of each modulating cycle.
28 Citations
21 Claims
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1. Power conversion apparatus comprising:
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a source-side inverter;
a drive-side inverter;
a dc current link coupled between an output of the source-side inverter and an input of the drive-side inverter; and
a controller for operating the source-side inverter in current mode and the drive-side inverter in a commutation mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20)
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13. A controller for a first inverter coupled between a power source and a dc current link and a second inverter coupled between an ac drive and the dc link, the controller comprising:
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a circuit for commanding the first inverter to perform current regulation on the dc current link during a first portion of each modulating cycle and current mode space vector modulation during a second portion of each modulating cycle;
the circuit commanding the second inverter to operate in commutation mode.
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21. Apparatus comprising:
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an ac motor;
a first inverter having an input adapted to receive ac power;
a second inverter coupled to the ac motor;
means for operating the first inverter in current mode; and
means for operating the second inverter in commutation mode.
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Specification