DEVICE FOR DRIVING SWITCHING ELEMENTS
First Claim
1. A drive device for driving a switching element of a voltage controlled type, comprising:
- a first path comprised of a passive element and a first opening/closing means and capable of connecting and disconnecting a conductive control terminal of a switching element to a high voltage supply means;
a second path comprised of a passive element and a second opening/closing means and capable of connecting the conductive control terminal of the switching element to a low voltage supply means; and
a switching means for switching a first state to a second state of the first opening/closing means and the second opening/closing means in order to switch a switching state of the switching element, where the first state indicates that both the first opening/closing means and the second opening/closing means are simultaneously turned on, and the second state indicates that one of the first opening/closing means and the second opening/closing means is turned on and the other opening/closing means is turned off,wherein one of the first opening/closing means and the second opening/closing means is capable of connecting one of the high voltage supply means and the second voltage power source to the conductive control terminal of the switching element in order to supply a voltage to the conductive control terminal of the switching element so that the switching element enters the switching state indicated by the switching means.
1 Assignment
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Accused Products
Abstract
A drive unit controls the operation of a corresponding power switching element such as IGBT which forms an inverter and a converter. The drive unit controls the operation of the corresponding power switching element to supply an operation current to a motor generator. First and second switching elements in the drive unit are simultaneously turned on when an operation signal transferred from a control device is switched to a turning-on instruction operation signal. The voltage at the gate terminal of the power switching element is shifted to a divided voltage obtained by dividing a voltage of the power source by first and second resistances connected in series in the drive unit. When a mirror time period of the power switching element is elapsed, the second switching element only is turned off in order to shift the gate voltage of the power switching element to the voltage of the power source.
28 Citations
24 Claims
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1. A drive device for driving a switching element of a voltage controlled type, comprising:
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a first path comprised of a passive element and a first opening/closing means and capable of connecting and disconnecting a conductive control terminal of a switching element to a high voltage supply means; a second path comprised of a passive element and a second opening/closing means and capable of connecting the conductive control terminal of the switching element to a low voltage supply means; and a switching means for switching a first state to a second state of the first opening/closing means and the second opening/closing means in order to switch a switching state of the switching element, where the first state indicates that both the first opening/closing means and the second opening/closing means are simultaneously turned on, and the second state indicates that one of the first opening/closing means and the second opening/closing means is turned on and the other opening/closing means is turned off, wherein one of the first opening/closing means and the second opening/closing means is capable of connecting one of the high voltage supply means and the second voltage power source to the conductive control terminal of the switching element in order to supply a voltage to the conductive control terminal of the switching element so that the switching element enters the switching state indicated by the switching means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification