Centrifuge and power controlling apparatus including a voltage switching unit

摘要

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.

主权项

1. A centrifuge comprising:
a rotor configured to accommodate a sample; a motor configured to rotationally drive the rotor; a bowl configured to define a rotor chamber which accommodates the rotor; a chiller configured to maintain temperature of the rotor chamber to a desired temperature by cooling the bowl; a control unit configured to control a rotation of the motor and an operation of the chiller; a transformer which includes a plurality of secondary side taps and is configured to transform an AC voltage which is input from a primary side to a plurality of voltages; a voltage switching unit configured to be connected to the plurality of secondary side taps, select any one of the plurality of secondary side taps, and output an output of the selected secondary side tap; and a frequency determination unit configured to determine a frequency of the AC voltage, wherein the control unit controls the voltage switching unit so as to select one of the plurality of secondary side taps which corresponds to the frequency determined by the frequency determination unit.