Parallel inverter scheme for separating conduction and switching losses
First Claim
1. A controller coupled to a first inverter and a second inverter forming a parallel inverter scheme, the first inverter and the second inverter configured to provide power to a load, the controller configured to:
- control the first inverter to operate according to a first switching state while the second inverter is off;
turn on the second inverter such that the first inverter and the second inverter simultaneously operate according to the first switching state to share current during a first zero voltage switching (ZVS) period before the first inverter is turned off;
turn off the first inverter after the first ZVS period and before a transition from the first switching state to a second switching state;
control the second inverter to operate during the transition from the first switching state to the second switching state while the first inverter is off;
turn on the first inverter after the transition such that the first inverter and the second inverter simultaneously operate according to the second switching state to share the current during a second ZVS period before the second inverter is turned off;
turn off the second inverter after the second ZVS period; and
control the first inverter to operate according to the second switching state.
1 Assignment
0 Petitions
Accused Products
Abstract
In one example embodiment, a controller is coupled to a first inverter and a second inverter forming a parallel inverter scheme. The first inverter and the second inverter are configured to provide power to a load. The controller is configured to control the first inverter to operate according to a first operating state, while the second inverter is off, and turn off the first inverter before transition from the first operating state to a second operating state. The controller is further configured to control the second inverter to at least partially operate during the transition.
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Citations
15 Claims
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1. A controller coupled to a first inverter and a second inverter forming a parallel inverter scheme, the first inverter and the second inverter configured to provide power to a load, the controller configured to:
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control the first inverter to operate according to a first switching state while the second inverter is off; turn on the second inverter such that the first inverter and the second inverter simultaneously operate according to the first switching state to share current during a first zero voltage switching (ZVS) period before the first inverter is turned off; turn off the first inverter after the first ZVS period and before a transition from the first switching state to a second switching state; control the second inverter to operate during the transition from the first switching state to the second switching state while the first inverter is off; turn on the first inverter after the transition such that the first inverter and the second inverter simultaneously operate according to the second switching state to share the current during a second ZVS period before the second inverter is turned off; turn off the second inverter after the second ZVS period; and control the first inverter to operate according to the second switching state. - View Dependent Claims (2, 3, 4, 5)
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6. A voltage command generator coupled to a parallel inverter scheme including a first inverter and a second inverter, the voltage command generator configured to,
receive a plurality of voltage commands from a machine controller; - and
generate a plurality of control commands based on each of the plurality of voltage commands to, control the first inverter to operate according to a first switching state while the second inverter is off, turn on the second inverter such that the first inverter and the second inverter simultaneously operate according to the first switching state to share current during a first zero voltage switching (ZVS) period before the first inverter is turned off, turn off the first inverter after the first ZVS period and before a transition from the first switching state to a second switching state, control the second inverter to operate during the transition from the first switching state to the second switching state while the first inverter is off, turn on the first inverter after the transition such that the first inverter the second inverter simultaneously operate according to the second switching state to share the current during a second ZVS period before the second inverter is turned off, turn off the second inverter after the second ZVS period, and control the first inverter to operate according to the second switching state. - View Dependent Claims (7, 8, 9, 10)
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11. A parallel inverter scheme comprising:
a first inverter and a second inverter configured to operate according to a plurality of voltage commands received from a machine controller such that, the first inverter is configured to operate according to a first switching state while the second inverter is off, and the second inverter is configured to turn on such that the first inverter and the second inverter simultaneously operate according to the first switching state to share current during a first zero voltage switching (ZVS) period before the first inverter is turned off, the first inverter is configured to turn off after the first ZVS period and before a transition from the first switching state to a second switching state, the second inverter is configured to operate during the transition from the first switching state to the second switching state while the first inverter is off, the first inverter is configured to turn on after the transition such that the first inverter and the second inverter simultaneously operate according to the second switching state to share current during a second ZVS period before the second inverter is turned off, the second inverter is configured to turn off after the second ZVS period, and the first inverter is configured to operate according to the second switching state. - View Dependent Claims (12, 13, 14, 15)
Specification