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OMRON Sysdrive 3G3HV - Detector Cooling Section

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atio of harmonics in the output current of the Inverter is higher than<br />

that of any other electric machine.<br />

Voltage<br />

Time<br />

Voltage<br />

Rectified<br />

Smoothed<br />

Time<br />

Voltage<br />

A current flows into the capacitors. The<br />

current is different from the voltage in waveform.<br />

Current<br />

Time<br />

Time<br />

Countermeasures with Reactors against Harmonics Generation<br />

• DC/AC Reactors<br />

The DC reactor and AC reactor suppress harmonics and currents that<br />

change suddenly and greatly.<br />

The DC reactor suppresses harmonics better than the AC reactor.<br />

The DC reactor used with the AC reactor suppresses harmonics more<br />

effectively.<br />

The input power factor of the Inverter is improved by suppressing the<br />

harmonics in the input current of the Inverter.<br />

Note 18.5- to 160-kW Inverters have a built-in DC reactor.<br />

185- to 300-kW Inverters cannot use a DC reactor.<br />

• Connection<br />

Connect the DC reactor to the internal DC power supply of the Inverter<br />

after shutting off the power supply to the Inverter and making sure that<br />

the charge indicator of the Inverter turns off.<br />

!<br />

WARNING<br />

Do not touch the internal circuitry of the Inverter in operation, otherwise an<br />

electric shock or a burn injury may occur.<br />

• Wiring Method

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