Inverter
First Claim
1. An inverter for converting direct current voltage to alternating current voltage comprising:
- a first input arranged to be connected to a vessel'"'"'s ordinary current supply system, where said current supply system comprises a generator connected to a battery, andan output arranged to be connected to an alternating current motor, where, for at least a period of time, said alternating current motor requires a first torque M1 in order to rotate,wherein a regulating circuit is arranged to measure a charging current from said generator to said battery and to measure the voltage level in said battery,said regulating circuit is, in addition, arranged to permit an output current from said vessel'"'"'s ordinary current supply system to said inverter which is higher than said charging current, in a first operating mode and said regulating circuit is arranged to limit said output current while maintaining the torque for said motor, in a second operating mode,said regulating circuit is arranged to assume said first operating mode if said battery voltage is over a limit value for the battery voltage, andsaid regulating circuit is arranged to assume said second operating mode when said battery voltage is below said limit value for the battery voltage, in order thereby to prevent said battery voltage from dropping further.
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Accused Products
Abstract
The present invention relates to an inverter and a method for converting direct current voltage to alternating current. The inverter comprises a first input arranged to be connected to the ordinary current supply system of a vessel, where the current supply system comprises a generator connected to a battery, and an output, and an output arranged to be connected to an alternating current motor, where, for at least a period of time, the alternating current motor requires a first torque M1 in order to rotate. The inverter comprises, in addition, a regulating circuit arranged to measure a charging current from the generator to the battery and to measure the voltage level in the battery. The regulating circuit is, in addition, arranged to permit a certain output current from the vessel'"'"'s ordinary current supply system to the inverter which is higher than the charging current, in a first operating mode. The regulating circuit is, in addition, arranged to limit the output current while maintaining the torque for the alternating current motor, in a second operating mode.
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Citations
14 Claims
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1. An inverter for converting direct current voltage to alternating current voltage comprising:
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a first input arranged to be connected to a vessel'"'"'s ordinary current supply system, where said current supply system comprises a generator connected to a battery, and an output arranged to be connected to an alternating current motor, where, for at least a period of time, said alternating current motor requires a first torque M1 in order to rotate, wherein a regulating circuit is arranged to measure a charging current from said generator to said battery and to measure the voltage level in said battery, said regulating circuit is, in addition, arranged to permit an output current from said vessel'"'"'s ordinary current supply system to said inverter which is higher than said charging current, in a first operating mode and said regulating circuit is arranged to limit said output current while maintaining the torque for said motor, in a second operating mode, said regulating circuit is arranged to assume said first operating mode if said battery voltage is over a limit value for the battery voltage, and said regulating circuit is arranged to assume said second operating mode when said battery voltage is below said limit value for the battery voltage, in order thereby to prevent said battery voltage from dropping further. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for supplying current to an apparatus in a vehicle than has an ordinary current supply system, said ordinary current supply system comprising a battery which is charged by a generator, said vehicle comprising, in addition, an inverter that has an input connected to said ordinary current supply system and are output connected to said apparatus for supplying said apparatus with an alternating current, the method comprising the steps of:
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measuring a charging current from said generator to said battery, permitting an output current from said ordinary current supply system to said inverter during a first operating mode for supplying said apparatus with current, limiting said output current from said ordinary current supply system to said inverter during a second operating mode, while retaining the torque to said apparatus, and measuring the battery voltage, assuming said first operating mode if said battery voltage is above a limit value for the battery voltage, and assuming said second operating mode when said battery voltage is below said limit value for the battery voltage, in order thereby to prevent said battery voltage from dropping still further. - View Dependent Claims (14)
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Specification