| 摘要 |
<p>PURPOSE:To facilitate a low power loss, size reduction and weight reduction by a method wherein a rectifying bridge circuit composed of a plurality of MOS-FETs and a control means which applies a gate voltage to the FET when a reverse drain/source voltage is applied are provided. CONSTITUTION:Respective phase induced voltages between the respective output terminals of a three-phase output coils 2 are always compared with a voltage (+B) between both the terminals of a battery 3 by a controller 6. As a result, if the induced voltage of one phase is generated to a direction of charging the battery 3, i.e., a direction applying a reverse drain/source voltage to respective FET's 5a-5f and, moreover, if the voltage is higher than the battery voltage, the controller 6 supplies a gate voltage (higher than the source voltage), which is a control signal, to the gate terminal of an FET which is one of the two FET's connected to the high voltage side terminal of the two output terminals of the three-phase output coil 2 which outputs the induced voltage of that phase and is connected to the anode side of the battery 3 to make a reverse drain current -ID flow.</p> |
