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US 8,410,635 B2Granted
Systems and methods for deactivating a matrix converter
AssigneeGM Global Technology Operations LLC
InventorRay M. Ransom
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for deactivating a matrix conversion module. An electrical system comprises an alternating current (AC) interface, a matrix conversion module coupled to the AC interface, an inductive element coupled between the AC interface and the matrix conversion module, and a control module. The control module is coupled to the matrix conversion module, and in response to a shutdown condition, the control module is configured to operate the matrix conversion module to deactivate the first conversion module when a magnitude of a current through the inductive element is less than a threshold value.
Claims18
An electrical system comprising:
- an alternating current (AC) interface coupled to an AC energy source;
- a conversion module coupled to the AC interface;
- an inductive element coupled electrically in series between the AC interface and the conversion module;
- and
- a control module coupled to the conversion module, wherein in response to a shutdown condition, the control module is configured to:
- operate the conversion module with a shutdown duty cycle to maintain current through the inductive element;
- monitor the current through the inductive element;
- and
- when the current through the inductive element is less than a threshold value:
- operate the conversion module to discharge the inductive element;
- and
- deactivate the conversion module after operating the conversion module to discharge the inductive element to prevent current flow to the conversion module.
9 more elements
An electrical system comprising:
- an alternating current (AC) interface;
- a conversion module coupled to the AC interface;
- an inductive element coupled between the AC interface and the conversion module;
- and
- a control module coupled to the conversion module to deactivate the conversion module when a magnitude of a current through the inductive element is less than a threshold value in response to a shutdown condition, wherein the conversion module comprises:
- a first node coupled to the inductive element;
- a second node coupled to the AC interface;
- a third node;
- a fourth node;
- a first switch coupled between the first node and the third node, the first switch being configured to allow current from the third node to the first node when the first switch is closed;
- a second switch coupled between the first switch and the third node, the second switch being configured to allow current from the first node to the third node when the second switch is closed;
- a third switch coupled between the first node and the fourth node, the third switch being configured to allow current from the fourth node to the first node when the third switch is closed;
- a fourth switch coupled between the third switch and the fourth node, the fourth switch being configured to allow current from the first node to the fourth node when the fourth switch is closed;
- a fifth switch coupled between the second node and the fourth node, the fifth switch being configured to allow current from the second node to the fourth node when the fifth switch is closed;
- a sixth switch coupled between the fifth switch and the second node, the sixth switch being configured to allow current from the fourth node to the second node when the sixth switch is closed;
- a seventh switch coupled between the second node and the third node, the seventh switch being configured to allow current from the second node to the third node when the seventh switch is closed;
- and
- an eighth switch coupled between the seventh switch and the second node, the eighth switch being configured to allow current from the third node to the second node when the eighth switch is closed.
15 more elements
A method for controlling an electrical system including a conversion module and an inductive element configured electrically in series between the conversion module and an AC interface coupled to an AC energy source, the method comprising:
- operating the conversion module to achieve a desired flow of energy from the AC interface;
- identifying a shutdown condition;
- and
- in response to identifying the shutdown condition:
- operating the conversion module with a shutdown duty cycle to maintain current through the inductive element;
- monitoring current through the inductive element;
- and
- when a magnitude of the current through the inductive element is less than a threshold value:
- operating the conversion module to discharge the inductive element;
- and
- deactivating the conversion module after operating the conversion module to discharge the inductive element to prevent current flow to the conversion module.
8 more elements
An electrical system comprising:
- a direct current (DC) interface;
- a conversion module coupled to the DC interface;
- an alternating current (AC) interface;
- a second conversion module coupled to the AC interface;
- an inductive element coupled between the AC interface and the second conversion module;
- an isolation module coupled between the first conversion module and the second conversion module, the isolation module providing galvanic isolation between the first conversion module and the second conversion module;
- and
- a control module coupled to the second conversion module, wherein in response to a shutdown condition, the control module is configured to:
- operate the second conversion module with a shutdown duty cycle, wherein the shutdown duty cycle is equal to 1−U, wherein U is governed by the equation
- U
- =
-
- V
- AC
- P
- OUT
- ×
- R
- L
-
- ,
- where VAC represents a voltage at the AC interface, RL, represents an effective resistance at the DC interface, and POUT corresponds to an output power at the DC interface;
- and
- when a magnitude of the current through the inductive element is less than a threshold value:
- operate the second conversion module to discharge the inductive element;
- and
- deactivate the second conversion module after discharging the inductive element.
24 more elements
Dependencies are inferred from the claim text.