Grid shield
AssigneeCarrier Corporation
InventorFlorian Beaufrere
Life of this patent
Estimating the term…
Abstract
A grid-shielded electrical system for a transportation refrigeration system is provided. The grid-shielded electrical system includes a bus to deliver three-phase grid power, which is received from a grid, to electrical components of the transportation refrigeration system, a voltage sensor disposed to sense a condition of voltage on the bus and configured to generate voltage readings accordingly and a controller disposed in signal communication with the voltage sensor and configured to detect a root cause issue with the grid based on the voltage readings.
Claims18
A grid-shielded electrical system for a transportation refrigeration system, the grid-shielded electrical system comprising:
- a bus to deliver three-phase grid power, which is received from a grid, to electrical components of the transportation refrigeration system;
- a voltage sensor disposed to sense a condition of voltage on the bus and configured to generate voltage readings accordingly;
- and
- a controller disposed in signal communication with the voltage sensor and configured to detect a root cause issue with the grid based on the voltage readings,
- wherein:
- the grid-shielded electrical system further comprises a current sensor disposed to sense a condition of current on the bus and configured to generate current readings accordingly, and
- the controller is disposed in signal communication with the current sensor and configured to detect, in an absence of the root cause issue, a non-grid issue based on the current readings.
A transportation refrigeration unit for a shipping container, the shipping container configured to be transported by a ship, the transportation refrigeration unit comprising:
- a grid-shielded electrical system, the grid-shielded electrical system comprising:
- a bus to deliver three-phase grid power, which is received from a grid of the ship, to electrical components of the transportation refrigeration system;
- a voltage sensor disposed to sense a condition of voltage delivered to the bus and configured to generate voltage readings accordingly;
- and
- a controller disposed in signal communication with the voltage sensor and configured to detect a root cause issue with the grid based on the voltage readings,
- wherein the transportation refrigeration unit is operable in a standby mode while on board the transport ship and connected to the grid, the grid exclusively powering the electrical components in the stand-by mode, and
- wherein:
- the grid-shielded electrical system further comprises a current sensor disposed to sense a condition of current on the bus and configured to generate current readings accordingly from at least one of a low amperage condition and a sustained high amperage condition for each phase of the three-phase bus based on the current readings, and
- the controller is disposed in signal communication with the current sensor and configured to detect, in an absence of the root cause issue, a non-grid issue based on the current readings from the at least one of the low amperage condition and the sustained high amperage condition for each phase of the three-phase bus based on the current readings.
A grid-shielded electrical system for a transportation refrigeration system, the grid-shielded electrical system comprising:
- a current sensor disposed to sense a condition of current on a bus configured to deliver a three-phase grid power, wherein the current sensor is further configured to generate current readings;
- and
- a controller disposed in signal communication with the current sensor,
- the controller being configured to detect, in an absence of a root cause issue, a non-grid issue based on the current readings.
Dependencies are inferred from the claim text.