Sawafuji Electric Co., Ltd.
|Sawafuji Electric Co., Ltd. Patent applications|
|Patent application number||Title||Published|
|20150270755||ROTOR FOR GENERATOR - In a rotor for a generator in which a rotor core is fixed to a rotary shaft rotatably supported by a housing, and field coils are wound on a bobbin installed in the rotor core, so as to be disposed on opposite sides of one plane passing a center axis of the rotary shaft, parts of the bobbin corresponding to axial outer ends of the rotor core are provided with separation protrusions by each of which a corresponding one of coil end portions at opposite ends of each of the field coils in an axial direction of the rotary shaft is divided into an inner portion and an outer portion in a radial direction of the rotary shaft, and on opposite sides of each of the separation protrusions in a peripheral direction of the rotary shaft, gaps are respectively formed between the inner portion and the outer portion.||09-24-2015|
|20150244235||GENERATOR - In a generator in which a stator is fixed to a housing which includes a first bracket having a bearing portion for pivotally supporting one end portion of a rotary shaft, and a second bracket covering a cooling fan that rotates with the rotary shaft, and a rotor surrounded by the stator is fixed to the rotary shaft, the stator is fixed to the first bracket, and the first bracket is integrally provided with a tubular portion which surrounds the stator permitting cooling air sucked in by the cooling fan to flow between the tubular portion and an outer periphery of the stator, and the second bracket is connected to the tubular portion. Accordingly, cost is reduced by connecting first and second brackets together without using long through-bolts, and efficiency of cooling the stator is enhanced by making the cooling air flow along the outer periphery of the stator.||08-27-2015|
|20120223596||DEVICE FOR APPLYING HIGH VOLTAGE USING PULSE VOLTAGE, AND METHOD OF APPLYING HIGH VOLTAGE - A device for applying a high voltage using a pulse voltage is provided which applies a high voltage having a pulse width τ||09-06-2012|
|20120074912||INVERTER GENERATOR - A control circuit (microcomputer) is provided in each of two inverter portions. Magnitude of a target waveform signal corresponding to a voltage to be output by each of the inverter portions is varied according to an operation state. The number of revolution of the engine is adjusted according to the larger one of the effective powers output from the two inverter portions. To cope with a temporary output shortage from the AC generator, the output voltage is temporarily lowered and then the output voltage is restored after waiting for the number of revolution of the engine increases.||03-29-2012|
|20110204651||Engine Generator - An engine generator is provided having an improved cooling effect realized by cooling air while ensuring a compact arrangement of components in a housing. The engine generator includes an engine||08-25-2011|
Patent applications by Sawafuji Electric Co., Ltd.