Activation of a synchronous rectifier
AssigneeRobert Bosch GmbH
InventorsGert WOLF, Paul MEHRINGER, Kurt REUTLINGER, Gerhard WALTER
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Abstract
A rectifier bridge circuit is described for rectifying the phase voltage generated by a generator, including a positive half-bridge having multiple rectifier elements and a negative half-bridge having multiple rectifier elements. The rectifier elements each have a controllable switch having a diode connected in parallel. A control circuit is provided for switching the switches on and off. The switch-on time tswitch on setpoint and/or the switch-off time tswitch off setpoint of the switch is/are computed based on a characteristic map or a mathematical function.
Claims13
A rectifier bridge circuit for rectifying the phase voltage generated by a generator, including a positive half-bridge having multiple rectifier elements and a negative half-bridge having multiple rectifier elements, the rectifier elements each having a controllable switch having a diode connected in parallel, and a control circuit being provided for switching the switches on and off, wherein the switch-on time tswitch on setpoint and/or the switch-off time tswitch off setpoint of the switch is/are computed based on a characteristic map or a mathematical function.
The rectifier bridge circuit as recited in one of the preceding claims, wherein the controller controls more rapidly at a low rotational speed and/or small excitation currents.
The rectifier bridge circuit as recited in one of the preceding claims, wherein the controller-based switch-on time is set to zero when the switch-on time of the switch exceeds the commutation time.
The rectifier bridge circuit as recited in one of the preceding claims, wherein the derivative action within the characteristic maps or the mathematical function is greater for smaller excitation currents and/or lower rotational speeds.
The rectifier bridge circuit as recited in one of the preceding claims, wherein the switch-on time of a switch is ascertained using a comparator.
Dependencies are inferred from the claim text.