Patent ID: 6060814
Filing Date: 2000-05-09
Classification: F02D,H02N

Abstract:
In combination with a control circuit, a device controlled by the control circuit and driving capacitive actuators, comprising:a first series circuit disposed between a positive pole and a negative pole of a voltage source and conducting current towards the negative pole, said first series circuit including a recharging switch connected to the positive pole, a first discharging switch connected to said recharging switch, a charging switch connected to said first discharging switch and a second discharging switch connected to said charging switch;a first capacitor disposed in parallel with a second series circuit composed of said first discharging switch connected in series with said charging switch;a second capacitor disposed in parallel with a third series circuit composed of said charging switch connected in series with said second discharging switch;a ring-around coil having a first side connected to a node point of said recharging switch and said first discharging switch and a second side to be connected to a first side of an actuator to be driven;a controlled power MOSFET switch having a first side to be connected to a second side of the actuator to be driven and a second side connected to the negative pole;at least one further controlled power MOSFET switch having a first side connected to the negative pole and a second side to be connected to a first side of at least one further actuator to be driven, a second side of the at least one further actuator to be connected to said second side of said ring-around coil; anda diode disposed between said second side of said ring-around coil and the negative pole for conducting current from the negative pole towards said ring-around coil.