Power source device, electrophoresis device, power source device control method, and electrophoresis device control method

An electrophoresis device that employs a measurement tool including a capillary, the electrophoresis device comprising:

• a power source device configured to generate an electrophoresis voltage, wherein the power source device includes
• a high voltage generation circuit configured to generate a voltage for electrophoresis;
• a first external terminal and a second external terminal configured to apply the electrophoresis voltage to the capillary,
• a polarity switching circuit including a first internal conductor connected to the high voltage generation circuit and a second internal conductor, the polarity switching circuit being configured to selectably apply the electrophoresis voltage across the first external terminal and the second external terminal by application with either a forward direction polarity or a reverse direction polarity;
• and
• a switching control circuit configured to control polarity switching of the polarity switching circuit to select either one of application with the forward direction polarity or application with the reverse direction polarity;
• an input device configured to receive designation of an operation mode indicting either the forward direction polarity or the reverse direction polarity,
• wherein
• the polarity switching circuit includes a forward direction switch pair of a first forward direction switch and a second forward direction switch, and a reverse direction switch pair of a first reverse direction switch and a second reverse direction switch;
• the first forward direction switch is connected between the first internal conductor and the first external terminal;
• the second forward direction switch is connected between the second internal conductor and the second external terminal;
• the first reverse direction switch is connected between the first internal conductor and the second external terminal;
• the second reverse direction switch is connected between the second internal conductor and the first external terminal;
• the switching control circuit is configured to control the polarity switching circuit so as to make either one of the forward direction switch or the reverse direction switch exclusively conductive;
• each of the first forward direction switch, the second forward direction switch, the first reverse direction switch, and the second reverse direction switch, includes an input side that receives a switching signal according to the forward direction polarity or the reverse direction polarity and an output side that operates in response to the switching signal;
• and
• the output side is electrically insulated from the input side.

A method of controlling a power source device of an electrophoresis device employing a measurement tool including a capillary, the power source device comprising:

• a high voltage generation circuit configured to generate a voltage for electrophoresis;
• a first external terminal and a second external terminal configured to apply the electrophoresis voltage to the capillary;
• a polarity switching circuit including a first internal conductor connected to the high voltage generation circuit and a second internal conductor, the polarity switching circuit being configured to selectably apply a potential difference between the second internal conductor and the first internal conductor across the first external terminal and the second external terminal by application with either a forward direction polarity or a reverse direction polarity;
• and
• a switching control circuit configured to control polarity switching of the polarity switching circuit to select either one of application with the forward direction polarity or application with the reverse direction polarity,
• the polarity switching circuit includes a forward direction switch pair of a first forward direction switch and a second forward direction switch, and a reverse direction switch pair of a first reverse direction switch and a second reverse direction switch;
• the first forward direction switch is connected between the first internal conductor and the first external terminal;
• the second forward direction switch is connected between the second internal conductor and the second external terminal;
• the first reverse direction switch is connected between the first internal conductor and the second external terminal;
• the second reverse direction switch is connected between the second internal conductor and the first external terminal;
• the switching control circuit is configured to control the polarity switching circuit so as to make either one of the forward direction switch or the reverse direction switch exclusively conductive;
• each of the first forward direction switch, the second forward direction switch, the first reverse direction switch, and the second reverse direction switch, includes an input side that receives a switching signal according to the forward direction polarity or the reverse direction polarity and an output side that operates in response to the switching signal;
• and
• the output side is electrically insulated from the input side,
• the method comprising:
• connecting an output of the high voltage generation circuit of the power source device to either one of the first external terminal or the second external terminal of the power source device according to a selectable voltage polarity indicating either one of the forward direction polarity or the reverse direction polarity in the power source device;
• and
• operating the high voltage generation circuit after the output of the high voltage generation circuit has been connected to either one of the first external terminal or the second external terminal, and applying the electrophoresis voltage from the high voltage generation circuit to the capillary of the measurement tool set up in the electrophoresis device through the first external terminal or through the second external terminal.