ACTIVE GATE DRIVE CIRCUIT
First Claim
1. A gate drive circuit for controlling a gate-controlled component, the gate drive circuit comprising:
- a PI controller configured to receive an input reference signal (Vref,d/dt) and to control a gate voltage of a gate-controlled component;
a first feedback loop for the PI controller configured to provide feedback from a time derivative of a collector-to-emitter voltage (vCE) of the gate-controlled component, the first feedback loop having first gain (kv), and having a first blanking circuit configured to cut the first feedback loop when the gate-controlled component is in a blocking state; and
a second feedback loop for the PI controller configured to provide feedback from a time derivative of a collector current (iC) of the gate-controlled component, the second feedback loop having second gain (ki), and having a clipping circuit configured to modify the feedback signal in the second feedback loop during turn-on of the gate-controlled component when the time derivative of the collector current is negative.
2 Assignments
0 Petitions
Accused Products
Abstract
An exemplary gate drive circuit and method are disclosed for controlling a gate-controlled component, the gate drive circuit having a PI controller adapted to receive an input reference signal and to control a gate voltage of the gate-controlled component. The gate drive circuit can include a first feedback loop for the PI controller, the first feedback loop having a first gain (kv), a second feedback loop for the PI controller, the second feedback loop having a second gain (ki), and a clipping circuit adapted to modify a feedback signal in the second feedback loop during turn-on of the gate-controlled component when the time derivative of the collector current is negative. The first feedback loop can include a first blanking circuit adapted to cut the feedback loop when the gate-controlled component is in a blocking state.
-
Citations
20 Claims
-
1. A gate drive circuit for controlling a gate-controlled component, the gate drive circuit comprising:
-
a PI controller configured to receive an input reference signal (Vref,d/dt) and to control a gate voltage of a gate-controlled component; a first feedback loop for the PI controller configured to provide feedback from a time derivative of a collector-to-emitter voltage (vCE) of the gate-controlled component, the first feedback loop having first gain (kv), and having a first blanking circuit configured to cut the first feedback loop when the gate-controlled component is in a blocking state; and a second feedback loop for the PI controller configured to provide feedback from a time derivative of a collector current (iC) of the gate-controlled component, the second feedback loop having second gain (ki), and having a clipping circuit configured to modify the feedback signal in the second feedback loop during turn-on of the gate-controlled component when the time derivative of the collector current is negative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20)
-
-
14. A method for controlling a gate-controlled component by using a PI controller configured to receive an input reference signal (vref,d/dt) and to control a gate voltage of the gate-controlled component, the method comprising:
-
providing the input reference signal (vref,d/t) to the PI controller; obtaining a first feedback signal for the PI controller in a first feedback loop from a time derivative of a collector-to-emitter voltage (vCE) of the gate-controlled component; obtaining a second feedback signal for the PI controller in a second feedback loop from a time derivative of a collector current (iC) of the gate-controlled component; modifying the second feedback signal in a second feedback loop during turn-on of the gate-controlled component when the time derivative of the collector current is negative; and cutting the first feedback signal when the gate-controlled component is in a blocking state.
-
Specification