FAST SWITCHING FOR POWER INVERTER
First Claim
1. An apparatus, comprising:
- an inverter including a high-side switch coupled to a low-side switch, said inverter generating a time-varying drive current from a plurality of drive control signals, a positive rail voltage, and a negative rail voltage wherein controlling the switches to generate said time-varying drive current produces a potential transitory overshoot condition for one of said switches of said inverter;
a drive control, coupled to said inverter, to generate said drive control signals and to set a level of each of said rail voltages responsive to a plurality of controller signals; and
a controller monitoring one or more parameters indicative of said potential transitory voltage overshoot condition, said controller dynamically adjusting, responsive to said monitored parameters, said controller signals to reduce a risk of occurrence of said potential transitory voltage overshoot condition;
wherein said parameters include one or more signals in anticipation of said potential transitory voltage overshoot condition.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus includes an inverter including a high-side switch coupled to a low-side switch, the inverter generating a time-varying drive current from a plurality of drive control signals, a positive rail voltage, and a negative rail voltage wherein controlling the switches to generate the time-varying drive current produces a potential transitory overshoot condition for one of the switches of the inverter; a drive control, coupled to the inverter, to generate the drive control signals and to set a level of each of the rail voltages responsive to a plurality of controller signals; and a controller monitoring one or more parameters indicative of the potential transitory voltage overshoot condition, the controller dynamically adjusting, responsive to the monitored parameters, the controller signals to reduce a risk of occurrence of the potential transitory voltage overshoot condition.
-
Citations
20 Claims
-
1. An apparatus, comprising:
-
an inverter including a high-side switch coupled to a low-side switch, said inverter generating a time-varying drive current from a plurality of drive control signals, a positive rail voltage, and a negative rail voltage wherein controlling the switches to generate said time-varying drive current produces a potential transitory overshoot condition for one of said switches of said inverter; a drive control, coupled to said inverter, to generate said drive control signals and to set a level of each of said rail voltages responsive to a plurality of controller signals; and a controller monitoring one or more parameters indicative of said potential transitory voltage overshoot condition, said controller dynamically adjusting, responsive to said monitored parameters, said controller signals to reduce a risk of occurrence of said potential transitory voltage overshoot condition; wherein said parameters include one or more signals in anticipation of said potential transitory voltage overshoot condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method, the method comprising the steps of:
-
a) generating a time-varying drive current from a plurality of drive control signals, a positive rail voltage, and a negative rail voltage wherein said time-varying drive current produces a potential transitory overshoot condition for a switch of an inverter; b) generating said drive control signals and setting a level of one or more of said rail voltages for said inverter responsive to a plurality of controller signals; c) monitoring one or more parameters indicative of said potential transitory voltage overshoot condition; and d) adjusting dynamically, responsive to said monitored parameters, said controller signals to at least reduce a risk of occurrence of said potential transitory voltage overshoot condition; wherein said monitoring step c) includes evaluating one or more parameters anticipating a change to said drive current. - View Dependent Claims (11, 12, 13, 20)
-
-
14. A method, the method comprising the steps of:
-
a) calculating a maximum available voltage overshoot for an inverter producing a time-varying drive current; b) determining a current voltage overshoot for said inverter responsive to said time-varying drive current; c) operating said inverter in a first operational mode for minimization of switching losses when said current voltage overshoot is not greater than said maximum available voltage overshoot while increasing a risk of occurrence of a potential transitory voltage overshoot condition destructive to said inverter; and d) operating said inverter in a second operational mode for reduction of said risk of occurrence of said potential transitory voltage overshoot condition when said current voltage overshoot is greater than said maximum available voltage overshoot while increasing switching losses. wherein said determining step b) includes evaluating one or more parameters anticipating a change to said drive current. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification