Device with built-in active filter
AssigneeDaikin Industries, Ltd.
InventorsMasaki Kono, Reiji Kawashima, Takayuki Fujita
Life of this patent
Estimating the term…
Abstract
In a device with a built-in active filter, the device incorporating an active filter therein and being connected to an AC power source, the active filter operates based on a value detected by a load information detection unit detecting load information on an AC power source outside the device with a built-in active filter.
Claims8
A device with a built-in active filter, the device including an active filter and being connected to an AC power source to which a phase modification unit with a leading phase capacitor is connected, wherein
- the active filter is configured to operate based on a value detected by a load information detection unit detecting load information on the AC power source outside the device with a built-in active filter, and
- the device with the built-in active filter is configured to detect the value detected by a load information detection unit detecting load information on the AC power source and a current flowing from the AC power source to the active filter, and to provide a compensation current having a component corresponding to a reactive current in the AC power source.
A device with a built-in active filter, the device including an active filter and being connected to an AC power source,
- the active filter is configured to operate based on a value detected by a load information detection unit detecting load information on the AC power source outside the device with a built-in active filter,
- the operation of the active filter is controlled by a controller included in the device with a built-in active filter, and
- the controller obtains a degree of the current output by the active filter, using a current value corresponding to a reactive current in a load device connected to the AC power source and a current value of a current flowing from the AC power source to the active filter.
A device with a built-in active filter, the device including an active filter and being connected to an AC power source, wherein
- the active filter is configured to operate based on a value detected by a load information detection unit detecting load information on the AC power source outside the device with a built-in active filter,
- a phase modification unit is connected to the AC power source in parallel with the device with a built-in active filter to control a reactive power of the AC power source, and
- based at least on one of the reactive power of or a power source power factor of the AC power source, the active filter operates to correct a leading power factor caused by the control of the reactive power by the phase modification unit.
A device with a built-in active filter, the device including an active filter and being connected to an AC power source, wherein the active filter is configured to operate based on a value detected by a load information detection unit detecting load information on the AC power source outside the device with a built-in active filter, a magnitude of the current output from the active filter is calculated, using:
- a current value corresponding to a reactive current of a phase modification unit and a load device other than the device with a built-in active filter;
- and a current value of a current flowing from the AC power source to the load device.
Dependencies are inferred from the claim text.