Technique for decoupling the energy storage system voltage from the DC link voltage in AC electric drive systems
Patent 5373195 Issued on December 13, 1994. Estimated Expiration Date: 
December 23, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 23, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesControl apparatus for elevator Current-source power converting apparatus with self-extinction devices Current-type converter apparatus Motor vehicles Patent #: 5214358 InventorsApplicationNo. 993879 filed on 12/23/1992US Classes:307/45, With intervening converter307/46, Storage battery or accumulator-type source307/72, Diverse or unlike electrical characteristics323/222, Using choke and switch across source323/271, Switched (e.g., on-off control)363/98For bridge-type inverterExaminersPrimary: Pellinen, A. D.Assistant: Krishnan, Aditya Attorney, Agent or FirmInternational ClassH02M 005/458AbstractAn ac electric drive system includes a bidirectional power semiconductor interface between a battery, or an auxiliary energy storage device, and a power inverter for boosting an input dc voltage and for decoupling the dc link voltage from the input dc voltage such that the dc link voltage is substantially independent of the input dc voltage and the parameters of the battery or energy storage device. The input dc voltage is controlled to maximize efficiency along predetermined torque envelopes.Field of SearchBATTERY-FED MOTOR SYSTEMSWith flywheel on generator or on motor WITH FLYWHEEL OR MASSIVE ROTARY MEMBER SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS Using converter Using choke and switch across source Switched (e.g., on-off control) With intervening converter Storage battery or accumulator-type source Diverse or unlike electrical characteristics For transfer of power via a high voltage D.C. link (i.e., HVDC transmission system) By semiconductor rectifier and inverter For high voltage D.C. transmission systems Bridge type With thyristor control means in the line circuit With transistor control means in the line circuit For bridge-type inverter | |
