Electric power converters
阅读：13发布：2022-06-23
专利汇可以提供Electric power converters专利检索，专利查询，专利分析的服务。并且A class of power converters which operate between two voltages of continuously variable magnitudes and continuously reversible polarities. It has bidirectional power flow capabilities and some degree of input to output isolation can be provided for. The converter includes a simple circuit arrangement of passive inductors and capacitors and solid state switches controlled in a specific logic sequence so that the output voltage tends to follow a desired reference voltage in spite of limited changes in an either active or passive load. The inherent high efficiency, the relatively high switching frequencies, the possibility of adapting to changing input output wave forms and the suitability to modular construction techniques make power supplies built in accordance with the invention substantially better suited for emergency interfacing systems of different power sources on board airborne or mobile vehicles.，下面是Electric power converters专利的具体信息内容。
1. An apparatus for converting electrical energy, comprising: a capacitive element in circuit with a series-connected inductive element, a series-connected controlled first switching element leading to a first terminal, a series-connected second switching element leading to a second terminal, and a series-connected third switching element leading to a third terminal forming a pair with a previously mentioned terminal. in which at least one switching element additional to the first switching element is also controlled, in which the capacitive element is given a nominal positive reference side and all three mentioned switching elements are In electrical connection with the positive reference side, and in which at least one of the switching elements can be conductive to enable current to flow into the positive reference side and at least one of the switching elements can be conductive to enable current to flow out of the positive reference side of the capacitive element, and logic control circuits adapted to control switching of the switching of the switching elements consecutively and nonrepetatively within each cycle of a plurality of repeated power cycles so that each switching element conducts only once in each power cycle, the logic circuits comprising at least state determining logic receiving signals of input voltage polarity, of output voltage polarity and of direction of required power flow; phase determining logic; a variable frequency oscillator controlling switching frequency so as to be proportional to the current delivered; and switching element drivers incorporating switching element selection logic.
2. An apparatus for converting electrical energy, comprising: a first pair of terminals, a second pair of terminals, a base conductor which electrically connects a second terminal of the first terminal pair with a second terminal of the second terminal pair, a capacitive element in series connection with at least one inductive element, said capacitive element having a nominal positive reference side and a nominal negative reference side and in which the negative side of the capacitor is in connection with the base conductor, a first bi-directional switching element providing electrical connection between the base conductor and the positive side of the capacitor, a second bi-directional switching element providing electrical connection between a first terminal of the first terminal pair and the positive side of the capacitor, and a third bi-directional switching element providing electrical connection between a first terminal of the second terminal pair and the positive side of the capacitor, and logic control circuits which comprise polarity and relative magnitude sensing logic elements receiving inputs from the first and second terminal pair, desired direction of power flow logic elements, desired current magnitude logic elements and state determining and trigger sequence determining logic elements receiving inputs from all the aforementioned logic elements and giving triggering outputs to the switching elements of the apparatus so as to control their switching to conducting condition from nonconducting condition in the switching sequence set forth in Generalized Table I of the specification in reference to which a voltage across the first pair of terminals is designated V1, a voltage across the second pair of terminals iss designated V2, the first, second and third bidirectional switching elements are designated by BDR1, BDR2 and BDR3 respectively, with the additional subscript ''''+'''' designating a conducting state: in the case of BDR1 from base conductor to capacitor and ''''- '''' the reverse, in the case of BDR2 from the first terminal of the first terminal pair to the capacitor and '''' - '''' the reverse, and in the case of BDR3 from the first terminal of the second terminal pair to the capacitor and '''' - '''' the reverse.
3. An apparatus for converting electrical energy, comprising: a capacitor in circuit with at least one series connected inductive element, a first terminal pair, a second terminal pair, said capacitor having a nominal positive reference side in series connection with: a first switching element leading to a second terminal of the second terminal pair, the switching element adapted so that current can flow through it into the positive terminal of the capacitor, and into the second terminal of the second terminal pair, a second switching element leading to a first terminAl of the first terminal pair, the switching element adapted so that current can flow through it into the positive terminal of the capacitor and into the first terminal of the first terminal pair, a third switching element leading to a first terminal of the second terminal pair, the switching element adapted so that current can flow through out of the positive terminal of the capacitor and out of the first terminal of the second terminal pair, and a fourth switching element leading to a second terminal of the first terminal pair, the switching element adapted so that current can flow through it out of the positive terminal of the capacitor, and out of the second terminal of the first terminal part, in which the nominal negative terminal of the capacitor is decoupled to both the pairs of terminals and logic control circuitry state determining logic receiving signals of input voltage polarity, of output voltage polarity and of direction of required power flow: phase determining logic; a variable frequency oscillator controlling switching frequency so as to be proportional to the current delivered; and switching element drivers incorporating switching element selection logic adapted to control switching of the switching elements in at least one of the two states set out in the table below:
4. An apparatus for converting electrical energy, comprising: a first terminal pair, a second terminal pair, a floating earth line which is AC decoupled to both the pairs of terminals a capacitor in series electrical connection with at least one inductive element, in which the capacitor has nominal positive and negative reference sides with the negative side in electrical connection with the floating earth line, a first bidirectional switching element providing electrical connection between a first terminal of the first terminal pair and the positive side of the capacitor, a second bidirectional switching element providing electrical connection between a second terminal of the first terminal pair and the positive side of the capacitor, a third bi-directional switching element providing electrical connection between a first terminal of the second terminal pair and the positive side of the capacitor, a fourth bi-directional switching element providing electrical connection between a second terminal of the second terminal pair and the positive side of the capacitor and logic control circuits which comprise a differential comparison amplifier and level detector logic element receiving analogues from a desired voltage and an actual circuit output voltage, two polarity detection logic elements receiving analogues of the circuit input and output voltage polarities, an absolute value network receiving a logic input from the differential comparison amplifier and level detector logic element and leading to a voltage to frequency conversion element which in turn leads to a counter and decoder element, a direction of power flow decision logic element receiving logic input from the differential comparison amplifier and level detector element and from the circuit output polarity detection element, leading to a state determination logic element which also receives logic input from the two polarity detection elements, a switching member selection logic element receiving logic input from the state determination logic element anD from the counter and decoder element and initiating control pulses to the controlled switching elements adapted to cause them to switch in at least one state as set out in Generalized table II of the specification in reference to which a voltage across the first terminal pair is designated by V1, a voltage across the second terminal pair is designated by V2, the first, second, third and fourth bidirectional switching elements are designated by BDR1, BDR2, BDR3 and BDR4 respectively, with the additional subscript '''' + '''' indicating a conducting state in the case of BDR1 from the first terminal of the first terminal pair to the capacitor, in the case of BDR2 from the second terminal of the first terminal pair to the capacitor, in the case of BDR3 from the first terminal of the second terminal pair to the capacitor and in the case of BDR4 from the second terminal of the second terminal pair to the capacitor and the subscript '''' - '''', indicating the opposite direction conducting state in each case.
5. An apparatus for converting electrical energy, comprising: a capacitive element in circuit with at least one series connected inductive element in which the capacitive element has nominal positive and negative reference sides, a first pair of terminals, a second pair of terminals, a first pair of switching elements, the first switching element of the first switching element pair being connected between the second terminal of the second terminal pair and the positive side of the capacitor and the second switching element of the first switching element pair being connected between the second terminal of the second terminal pair and the negative side of the capacitor, the switching elements of the first switching element pair being adapted so that current can flow through them into the positive side of the capacitor, and out of the first terminal of the second terminal pair and into the second terminal of the second terminal pair, a second pair of switching elements, a first switching element of the second switching element pair being connected between the first terminal of the first terminal pair and the positive side of the capacitor, a second switching element of the second switching element pair being connected between the second terminal of the first terminal pair and the negative side of the capacitor, the switching elements of the second switching element pair being adapted so that current can flow through them into the positive side of the capacitor, and into the first terminal of the first terminal pair and out of the second terminal of the first terminal pair, a third pair of switching elements, a first switching element of the third switching element pair being connected between the first terminal of the second terminal pair and the positive side of the capacitor and a second switching element of the third switching element pair being connected between a second terminal of the second terminal pair and the negative side of the capacitor, the switching elements of the third switching element pair being adapted so that current can flow through them into the negative side of the capacitor and into the second terminal of the second terminal pair and out of the first terminal of the second terminal pair, and a fourth switching element pair, a first switching element of the fourth switching element pair being connected between the first terminal of the first terminal pair and the negative side of the capacitor and a second switching element of the fourth switching element pair being connected between the second terminal of the first terminal pair and the positive side of the capacitor, the switching elements of the fourth switching element pair being adapted so that current can flow through them into the negative side of the capacitor and into the first terminal of the first terminal pair and out of the sEcond terminal of the first terminal pair, and logic control circuitry comprising at least state determining logic receiving signals of input voltage polarity, of output voltage polarity and of direction of required power flow; phase determining logic; a variable frequency oscillator controlling switching frequency so as to be proportional to the current delivered; and switching element drivers incorporating switching elements so as to conduct in at least one of the two states set out in the table below:
6. An apparatus for converting electrical energy comprising: a capacitive element in series connection with at least one inductive element, the capacitive element having nominal positive and negative reference sides, a first paid of terminals, a second pair of terminals, a first pair of bidirectional switching elements, the first switching element of the first switching element pair providing electrical connection between the positive reference side of the capacitor and a first terminal of the first terminal pair and the second switching element of the first switching element pair providing electrical connection between the negative reference side of the capacitor and a second switching element of the first switching element pair, a second pair of bi-directional switching elements, the first switching element of the second switching element pair providing electrical connection between the positive reference side of the capacitor and the second terminal of the first terminal pair and the second stiwching element of the second switching element pair providing electrical connection between the negative reference side of the capacitive element and the first terminal of the second terminal pair, a third pair of bi-directional switching elements, the first bi-directionsl switching elements of the third bi-directional switching element pair providing electrical connection between the positive reference side of the capacitive element and the first terminal of the second terminal pair and the second bi-directional switching element of the third bi-directional switching element pair providing electrical connection between the negative side of the capacitive element and a second terminal of the second terminal pair a fourth pair of bi-directional switching elements, the first bi-directional switching elements of the fourth bi-directional switching element pair providing electrical connection between the positive reference side of the capacitive elements and the second terminal of the second terminal pair and the second bi-directional switching elements of the fourth bi-directional switching element pair providing electrical connection between the negative reference side of the capacitive element and the first terminal of the second terminal pair and logic control circuits which comprise a differential comparison amplifier and a level detector logic element receiving analogues from a desired voltage and an actual circuit output voltage, two polarity detection logic elements receiving analogues of the circuit input and output voltage polarities, an absolute value network receiving a logic input from the differential comparison amplifier and level detector logic element and leading to a voltage to frequency conversion element which in turn leads To a counter and decoder element, a direction of power flow decision logic element receiving logic element receiving logic input from the differential comparison amplifier and level detector element and from the circuit output polarity detection element, leading to a state determination logic element which also receives logic input from the two polarity detection elements, a switching member selection logic element receiving logic input from the state determination logic element and from the counter and decoder element and initiating control pulses to the controlled switching elements adapted to cause them to switch in at least one state set out in Generalized table III as found in the specification, in reference to which a voltage at the second terminal pair is designated by V1, a voltage at the second terminal pair is designated by V2, the bidirectional switching switching elements being indicated by BDR with a first suffix indicating the number of the pair, a second suffix indicating whether it is the first or second of the pair and a third suffix + indicating a conducting state for current flow in a direction into the positive side of the capacitor and out of the negative side of the capacitor and - the reverse direction conducting state.
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