Centrifuge and power controlling apparatus including a voltage switching unit

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United States of America Patent

PATENT NO 9452437
APP PUB NO 20140045669A1
SERIAL NO

13989626

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A centrifuge includes a rotor which accommodates a sample, a motor which rotationally drives the rotor and a chiller which cools a rotor chamber, and is provided with a transformer which has a plurality of secondary side taps, converts an AC voltage which is input from a primary side to a plurality of voltages, and outputs, and a voltage switching unit which is connected to the plurality of secondary side taps of the transformer, selects any one of outputs of the secondary side taps, and outputs to the chiller. The microcomputer controls the voltage switching unit corresponding to the power supply frequency which is determined using the output of the zero-crossing detection circuit, and supplies the desired driving voltage to the chiller.

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Patent Owner(s)

  • HITACHI KOKI CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Maeno, Kousuke Ibaraki, JP 1 6
Osawa, Hidetaka Ibaraki, JP 13 304
Takahashi, Hiroyuki Ibaraki, JP 707 14572

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