Drive system for power switching elements
AssigneeDenso Corporation
InventorsHiroshi Inamura, Tsuneo Maebara, Junichi Fukuta
Life of this patent
Estimating the term…
Abstract
A drive system has a low voltage system, a high voltage system, and a transformer. The high voltage system has drive units which correspond to power switching elements. A capacitance in the high voltage system serves as a flouting power source which supplies electric power to each of the drive units. An output voltage of a secondary side coil of the transformer is supplied to the capacitance. A comparator compares the output voltage at the secondary side coil of the transformer with a threshold value. A switching speed change part changes the switching speed of each of the power switching element based on the comparison result of the comparator.
Claims9
A drive system that changes a switching speed of each of a plurality of power switching elements, comprising:
- operation means for controlling an operational voltage of a primary coil of a transformer in order to change an output voltage of a secondary coil of the transformer;
- drive units configured to receive the output voltage of the secondary coil of the transformer as a voltage of a power source and to supply a voltage to power switching elements of a voltage control type;
- and
- change means for changing a switching speed of the power switching elements on the basis of the output voltage of the secondary coil of the transformer, using at least one selected from:
- (a) a resistance value of an electrical path through which the voltage is supplied to a conductive control terminal of each of the power switching elements;
- and
- (b) a capacitance between an output terminal and the conductive control terminal of each of the power switching elements.
A drive system for changing a switching speed of each of a plurality of power switching elements, comprising:
- operation means for controlling an operational voltage of a primary coil of a transformer in order to change an output voltage of a secondary coil of the transformer;
- voltage control means for receiving as a voltage of a power source, the output voltage of the secondary coil of the transformer, the voltage control means changing the output voltage of the secondary coil of the transformer to a predetermined voltage value, and outputting the changed voltage as an output voltage,
- drive units configured to supply the output voltage of the voltage control means to the power switching elements of a voltage control type in order to drive the power switching elements;
- and
- change means for changing a switching speed of the power switching elements, by changing the output voltage of the voltage control means on the basis of the output voltage of the secondary coil of the transformer.
Dependencies are inferred from the claim text.