DRIVER FOR SWITCHING ELEMENT AND CONTROL SYSTEM FOR ROTARY MACHINE USING THE SAME
First Claim
1. A driver for driving a voltage-controlled switching element having a conductive path and an on-off control terminal according to a drive signal indicating selectively a first state and a second state of the voltage-controlled switching element, the first state being one of an on state and an off state of the voltage-controlled switching element, the second state being the other state thereof, the driver comprising:
- a charging module configured to store electrical charge on the on-off control terminal of the voltage-controlled switching element via a normal electrical path connected to the on-off control terminal to charge the voltage-controlled switching element upon the drive signal indicating a change of the voltage-controlled switching element from the first state to the second state, thus changing the voltage-controlled switching element from the first state to the second state;
an adjusting module configured to change a value of a parameter correlating with a charging rate of the voltage-controlled switching element through the normal electrical path as a function of an input signal to the driver to adjust the charging rate therethrough, the input signal representing at least one of;
a current flowing through the conductive path, a voltage across both ends of the conductive path, and a voltage at the on-off control terminal; and
a disabling module configured to disable the adjusting module from changing the value of the parameter if the drive signal indicates the first state of the voltage-controlled switching element.
1 Assignment
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Accused Products
Abstract
In a driver, a charging module stores negative charge on the gate of a switching element via a normal electrical path to charge the switching element upon a drive signal representing change of an on state to an off state. This shifts the on state of the switching element to the off state. An adjusting module changes a value of a parameter correlating with a charging rate of the switching element through the normal electrical path as a function of an input signal to the driver. The input signal represents a current flowing through the conductive path, a voltage across both ends of the conductive path, or a voltage at the gate. A disabling module disables the adjusting module from changing the value of the parameter if the drive signal represents the on state of the switching element.
24 Citations
12 Claims
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1. A driver for driving a voltage-controlled switching element having a conductive path and an on-off control terminal according to a drive signal indicating selectively a first state and a second state of the voltage-controlled switching element, the first state being one of an on state and an off state of the voltage-controlled switching element, the second state being the other state thereof, the driver comprising:
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a charging module configured to store electrical charge on the on-off control terminal of the voltage-controlled switching element via a normal electrical path connected to the on-off control terminal to charge the voltage-controlled switching element upon the drive signal indicating a change of the voltage-controlled switching element from the first state to the second state, thus changing the voltage-controlled switching element from the first state to the second state; an adjusting module configured to change a value of a parameter correlating with a charging rate of the voltage-controlled switching element through the normal electrical path as a function of an input signal to the driver to adjust the charging rate therethrough, the input signal representing at least one of;
a current flowing through the conductive path, a voltage across both ends of the conductive path, and a voltage at the on-off control terminal; anda disabling module configured to disable the adjusting module from changing the value of the parameter if the drive signal indicates the first state of the voltage-controlled switching element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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 driving each of the first and second voltage-controlled switching elements according to a drive signal drive signal indicating selectively a first state and a second state of a corresponding one of the first and second voltage-controlled switching elements 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 first state being one of an on state and an off state of a corresponding one of the first and second voltage-controlled switching elements, the second state being the other thereof, the driver for each of the first and second voltage-controlled switching elements comprising; a charging module configured to store electrical charge on the on-off control terminal of a corresponding one of the first and second voltage-controlled switching elements via a normal electrical path connected to the on-off control terminal to charge a corresponding one of the first and second voltage-controlled switching elements upon the drive signal indicating a change of a corresponding one of the first and second voltage-controlled switching elements from the first state to the second state, thus changing a corresponding one of the first and second voltage-controlled switching elements from the first state to the second state; an adjusting module configured to change a value of a parameter correlating with a charging rate of a corresponding one of the first and second voltage-controlled switching elements through the normal electrical path as a function of an input signal to the driver to adjust the charging rate therethrough, the input signal representing at least one of;
a current flowing through the conductive path, a voltage across both ends of the conductive path, and a voltage at the on-off control terminal; anda disabling module configured to disable the adjusting module from changing the value of the parameter if the drive signal indicates the first state of a corresponding one of the first and second voltage-controlled switching elements.
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Specification