Integrated traction inverter and battery charger apparatus
First Claim
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1. An integrated inverter/charger apparatus, comprising:
- a polyphase bridge inverter adapted to be connected to a polyphase load said inverter including a plurality of switch elements and current path blocking elements;
an input capacitor, said capacitor and inverter adapted to be connected in parallel across a DC source;
a rectifier having an input and an output connected at its input to an AC input line;
inductor means connected between said inverter and said output of the rectifier; and
control circuitry coupled to said inverter and being adapted to control the invertor in either a drive mode wherein, with the AC input line being disconnected from said input of the rectifier and with said inverter being connected to the polyphase load, said inverter is rendered active by said control circuitry so as to be operated by the DC source to drive the polyphase load or a charge mode wherein, with the AC input line being connected to said input of the rectifier and with said inverter remaining connected to the polyphase load, only a portion of said inverter is rendered active by said control circuitry so as to connect the DC source and input capacitor with said inductor means and rectifier and to be operated by the AC input line to charge the DC source.
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Abstract
An integrated traction inverter and battery charger apparatus which is capable of operating in either drive or charge modes. The apparatus integrates the components of a prior art three-phase inverter with an AC line-powered prior art DC source charger in a manner which recognizes that an input capacitor and certain components of a three-phase bridge inverter are capable of performing dual functions and thus can be active in both modes. Therefore, in the integration of the prior art devices some of the components are eliminated allowing savings in cost and weight of, and space required by, the components of the integrated inverter/charger apparatus.
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Citations
7 Claims
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1. An integrated inverter/charger apparatus, comprising:
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a polyphase bridge inverter adapted to be connected to a polyphase load said inverter including a plurality of switch elements and current path blocking elements; an input capacitor, said capacitor and inverter adapted to be connected in parallel across a DC source; a rectifier having an input and an output connected at its input to an AC input line; inductor means connected between said inverter and said output of the rectifier; and control circuitry coupled to said inverter and being adapted to control the invertor in either a drive mode wherein, with the AC input line being disconnected from said input of the rectifier and with said inverter being connected to the polyphase load, said inverter is rendered active by said control circuitry so as to be operated by the DC source to drive the polyphase load or a charge mode wherein, with the AC input line being connected to said input of the rectifier and with said inverter remaining connected to the polyphase load, only a portion of said inverter is rendered active by said control circuitry so as to connect the DC source and input capacitor with said inductor means and rectifier and to be operated by the AC input line to charge the DC source. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An integrated inverter/charger apparatus, comprising:
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a polyphase bridge inverter having a plurality of switch elements and current path blocking elements and a plurality of output leads adapted to be connected to a polyphase load; an input capacitor, said capacitor and inverter adapted to be connected in parallel across a DC source; rectifier having an input connected to an AC input line and an output; an inductor connected between said inverter and said output of the rectifier; and control circuitry coupled to said switch elements of said inverter and being adapted to control the inverter in either a drive mode wherein, with the AC input line being disconnected from said rectifier and with said output leads of said inverter being connected to the polyphase load, at various times all of said switch and current blocking elements of said inverter are rendered active by said control circuitry so as to be operated by the DC source to drive the polyphase load or a charge mode wherein, with the AC input line being connected to said rectifier and with said output leads of said inverter remaining connected to the polyphase load, some but not all of said switch and current blocking elements of said inverter are rendered active by said control circuitry so as to connect the DC source and input capacitor with said inductor and rectifier and to be operated by the AC input line to charge the DC source.
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Specification