Apparatus and method for controlling the motor power
First Claim
1. A power control apparatus for supplying power between an electric machine and an energy source, said power control apparatus containing at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches, wherein at least one of the converters contains switches belonging to at least two modules and the switches of at least one module belong to two or more converters,wherein the power control apparatus comprises a three-phase mains inverter and a three-phase load-side inverter, which have a common direct-voltage intermediate circuit and which comprise three switch modules in all, each switch module consisting of three bidirectional switches and that the three-phase mains inverter contains three bidirectional switches one for each phase, each one of said bidirectional switches being placed in a different switch module, and that the three-phase load-side inverter contains six bidirectional switches in all, two parallel-connected bidirectional switches for each phase in each switch module.
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Accused Products
Abstract
The invention concerns a power control apparatus and a method for supplying power between an electric machine and an energy source. The power control apparatus contains at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches. In the method of the invention, a first set of switches belonging to at least two different modules and arranged to form a first converter is controlled by a first converter control, and a second set of switches arranged to form a second converter is controlled by a second converter control.
17 Citations
18 Claims
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1. A power control apparatus for supplying power between an electric machine and an energy source, said power control apparatus containing at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches, wherein at least one of the converters contains switches belonging to at least two modules and the switches of at least one module belong to two or more converters,
wherein the power control apparatus comprises a three-phase mains inverter and a three-phase load-side inverter, which have a common direct-voltage intermediate circuit and which comprise three switch modules in all, each switch module consisting of three bidirectional switches and that the three-phase mains inverter contains three bidirectional switches one for each phase, each one of said bidirectional switches being placed in a different switch module, and that the three-phase load-side inverter contains six bidirectional switches in all, two parallel-connected bidirectional switches for each phase in each switch module.
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18. A method for supplying power by a power control apparatus between an electric machine and an energy source, said power control apparatus containing at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches, wherein
a first set of switches belonging to at least two different modules and arranged to form a first converter is controlled by a first converter control, a second set of switches arranged to foam a second converter is controlled by a second converter control, and the method further comprises the following steps: -
controlling the middle bidirectional switch of the first switch module by the control of the first phase of the mains inverter, the middle bidirectional switch of the second switch module is controlled by the control of the second phase of the mains inverter and the middle bidirectional switch of the third switch module is controlled by the control of the third phase of the mains inverter controlling the two outermost bidirectional switches of the first switch module alternately by the control of the first phase of the load-side inverter, the two outermost bidirectional switches of the second switch module are controlled alternately by the control of the second phase of the load-side inverter and the two outermost bidirectional switches of the third switch module are controlled alternately by the control of the third phase of the load-side inverter in such manner that the positive and negative change-over contacts of the bidirectional switches being controlled are turned alternately into the conducting state and both the positive and the negative change-over contacts of the bidirectional switches not being controlled are held in the non-conducting state.
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Specification