Driver for switching element and control system for rotary machine using the same
First Claim
1. A driver for selectively performing a charging task and a discharging task for an on-off control terminal of a voltage-controlled switch having a conductive path, according to a drive signal directing selectively an on state and an off state of the voltage-controlled switch, thus setting the voltage-controlled switch to one of the on state and the off state, the driver comprising:
- a discharging-rate changing module adapted to change a rate of discharging the on-off control terminal of the voltage-controlled switch at least between a first value and a second value lower than the first value;
a measuring module configured to measure a value of a parameter as a function of a current flowing through the conductive path of the voltage-controlled switch during the drive signal being in the on state; and
a discharging control module configured to;
control the discharging-rate changing module, as a function of the value of the parameter, to select one of the first value and the second value as the rate of discharging the on-off control terminal of the voltage-controlled switch upon the drive signal directing a change from the on state of the voltage-controlled switch to the off state thereof; and
discharge the on-off control terminal of the voltage-controlled switch using the selected one of the first value and the second value as the rate of discharging the on-off control terminal of the voltage-controlled switch.
1 Assignment
0 Petitions
Accused Products
Abstract
In a driver, a changing module changes a rate of discharging the control terminal of a switch at least between a first value and a second value lower than the first value. A measuring module measures a value of a parameter as a function of a current flowing through the conductive path of the switch during a drive signal being in an on state. A control module controls the changing module, as a function of the value of the parameter, to select the first value or the second value as the rate of discharging the control terminal of the switch upon the drive signal directing a change from the on state of the switch to an off state thereof. The control module discharges the control terminal of the switch using the selected value as the rate of discharging the control terminal of the switch.
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Citations
18 Claims
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1. A driver for selectively performing a charging task and a discharging task for an on-off control terminal of a voltage-controlled switch having a conductive path, according to a drive signal directing selectively an on state and an off state of the voltage-controlled switch, thus setting the voltage-controlled switch to one of the on state and the off state, the driver comprising:
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a discharging-rate changing module adapted to change a rate of discharging the on-off control terminal of the voltage-controlled switch at least between a first value and a second value lower than the first value; a measuring module configured to measure a value of a parameter as a function of a current flowing through the conductive path of the voltage-controlled switch during the drive signal being in the on state; and a discharging control module configured to; control the discharging-rate changing module, as a function of the value of the parameter, to select one of the first value and the second value as the rate of discharging the on-off control terminal of the voltage-controlled switch upon the drive signal directing a change from the on state of the voltage-controlled switch to the off state thereof; and discharge the on-off control terminal of the voltage-controlled switch using the selected one of the first value and the second value as the rate of discharging the on-off control terminal of the voltage-controlled switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A control system for controlling a rotary machine, the control system comprising:
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a converter equipped with at least one pair of first voltage-controlled switching elements connected in series, each of the first voltage-controlled switching elements having a conductive path and an on-off control terminal; and an inverter equipped with at least one pair of second voltage-controlled switching elements connected in series, each of the second voltage-controlled switching elements having a conductive path and an on-off control terminal; and a driver for selectively performing a charging task and a discharging task for the on-off control terminal of each of the voltage-controlled switching elements, according to a drive signal directing selectively an on state and an off state of the voltage-controlled switch to thereby boost a DC voltage inputted to the converter, and invert the boosted DC voltage into an AC voltage to be supplied to the rotary machine, the driver for each of the first and second voltage-controlled switching elements comprising; a discharging-rate changing module adapted to change a rate of discharging the on-off control terminal of a corresponding one of the first and second voltage-controlled switching elements at least between a first value and a second value lower than the first value; a measuring module configured to measure a value of a parameter as a function of a current flowing through the conductive path of a corresponding one of the first and second voltage-controlled switching elements during the drive signal being in the on state; and a discharging control module configured to; control the discharging-rate changing module, as a function of the value of the parameter, to select one of the first value and the second value as the rate of discharging the on-off control terminal of a corresponding one of the first and second voltage-controlled switching elements upon the drive signal directing a change from the on state of a corresponding one of the first and second voltage-controlled switching elements to the off state thereof; and discharge the on-off control terminal of a corresponding one of the first and second voltage-controlled switching elements using the selected one of the first value and the second value as the rate of discharging the on-off control terminal thereof.
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Specification