| 摘要 |
<p>Burner system at least comprising a grounded burner, actuators with which the supply of fuel and air to the burner is adjusted, an ionization electrode disposed in the flame region, a flame amplifier at the ionization electrode for generating an ionization signal, and a final control device which during air ratio control mode sets a first actuator and adjusts a second actuator by means of the ionization signal and an ionization signal setpoint. Said flame amplifier is equipped with an AC voltage source for generating an AC voltage for the ionization electrode, with a voltmeter and with a voltage regulator which during voltage control mode controls the AC voltage source by means of the AC voltage measured by the voltmeter and a voltage setpoint, and also with an ionization current amplifier. The voltmeter is connected in parallel with a sequence comprising the ionization electrode, the flame region, the burner and the input of the ionization current amplifier. The connection of the voltage regulator to the voltmeter is designed such that, during voltage control mode, the time-averaged current caused by the voltmeter through said connection is less than 5% of the time-averaged current through the ionization electrode.</p> |
