摘要:
An apparatus for controlling a power converter operable to receive a cyclically varying input signal includes a discrete-time, on-time generator coupled to the power converter and configured to regulate an output voltage of the power converter and a controller configured to compare the output voltage of the power converter against a first predetermined range to: obtain a comparison result at a zero-crossing of the cyclically varying input signal and select one of a plurality of operation levels of the discrete-time, on-time generator in response to the comparison result. The plurality of operation levels includes a linear, discrete-time operation level and a nonlinear, discrete-time operation level.
摘要:
A power module includes: a first substrate layer that is disposed on a first plane; a second substrate layer that is disposed on a second plane that is parallel to the first plane; first and second electrical conductors that are configured to be electrically connected to first and second direct current (DC) reference potentials, respectively, and that extend outwardly from the power module on a third plane that is parallel to the first and second planes; third, fourth, and fifth electrical conductors that are configured to be electrically connected to first, second, and third alternating current (AC) reference potentials, respectively, and that extend outwardly from the power module on a fourth plane that is parallel to the first, second, and third planes; and a plurality of dies of switches, respectively, disposed between the first and second substrate layers.
摘要:
Provided are a power conversion device and a system using the same, which can reduce loss of each semiconductor element in a power conversion circuit and enable high efficiency of a device controlled by the power conversion device. The power conversion device includes a direct current (DC) power source; and a full-bridge circuit having first upper and lower arms having an upper element and a lower element and second upper and lower arms having an upper element and a lower element, in which the first upper and lower arms and the second upper and lower arms are electrically connectable to a device, and ON resistances of the upper element of the first upper and lower arms and the lower element of the second upper and lower arms are smaller than ON resistances of the lower element of the first upper and lower arms and the upper element of the second upper and lower arms.
摘要:
An inverter, a method and a device for controlling the inverter are provided, to improve efficiency of the inverter. The inverter includes a three-level active clamped topology including a first and second bus capacitors and an inverter circuit, the inverter circuit includes a first switch transistor to a sixth switch transistor. The inverter further includes a seventh switch transistor and an eighth switch transistor; the seventh switch transistor and the eighth switch transistor are connected in series between the positive direct current bus and the negative direct current bus in a same direction, and a serial point of the seventh switch transistor and the eighth switch transistor is connected to a serial point of the second switch transistor and the third switch transistor; and the seventh switch transistor and the eighth switch transistor are anti-parallel connected to corresponding diodes respectively.
摘要:
An AC/DC conversion circuit, including: four bidirectional switches forming an H bridge; a capacitor connected between input nodes of the bridge; a capacitor connected between output nodes of the bridge; and a control circuit capable of controlling the bridge alternately to a first configuration where first and second diagonals of the bridge are respectively conductive and non-conductive, and to a second configuration where the first and second diagonals are respectively non-conductive and conductive, the control circuit being capable, during a phase of transition between the first and second configurations, of: turning off the switches of the first diagonal; and for each switch of the second diagonal, turning on the switch only when the voltage thereacross takes a zero value.
摘要:
A multilevel converter converting between AC and DC includes a phase arm with a number of cells between a DC pole and an AC terminal, the cells include at least one hybrid full bridge cell including a first cell connection terminal for coupling to the DC pole, a second cell connection terminal for coupling to the AC terminal, an energy storage element having a positive and a negative end, a first group of series connected semiconducting units in parallel with the energy storage element, where a junction between these forms one cell connection terminal, and a second group of series connected semiconducting units in parallel with the energy storage element and including a third semiconducting unit and a fourth semiconducting unit consisting of a number of unidirectional conducting elements including at least one unidirectional conducting element, where a junction between these forms a further cell connection terminal.
摘要:
A power conversion apparatus 1 according to an embodiment of the present invention includes a high-voltage side input terminal TIH and a low-voltage side input terminal TIL, first and second output terminals TO1 and TO2, a power conversion circuit 10 that converts direct-current power input between the high-voltage side input terminal TIH and the low-voltage side input terminal TIL to generate alternating-current power between the first and second output terminals TO1 and TO2, and an inverted-voltage generation circuit 30 that generates an inverted voltage of a common mode voltage generated between the first and second output terminals TO1 and TO2 and inputs the inverted voltage to the low-voltage side input terminal TIL.
摘要:
It is presented a converter cell (10a; 10b) arranged to be used in a high voltage multilevel converter. The converter cell comprises: an energy storage element (16a; 16b) and a plurality of switching elements (S1, . . . , S8). The plurality of switching elements comprises at least one thyristor (S3; S8) and a plurality of transistors (S1, S2, S4; S5, S6, S7). Each one of the at least one thyristor (S3; S8) is provided in a position for a switching element in the converter cell where, during normal operation of the converter cell, the at least one thyristor is in a continuous conducting state. This reduces the power losses of the converter cell. A corresponding multilevel converter and a method are also presented.
摘要:
A power system, a power module therein and a method for fabricating power module are disclosed herein. The power module includes a first and a second common pins, and a first and a second bridge arms. The first and the second common pins are symmetrically disposed at one side of a substrate. The first bridge arm includes a first and a second semiconductor devices, and the first and the second semiconductor devices are connected to each other through the first common pin and disposed adjacently. The second bridge arm includes a third and a fourth semiconductor devices, and the third and the fourth semiconductor devices are connected to each other through the second common pin and disposed adjacently. The first and the third semiconductor devices are disposed symmetrically, and the second and the fourth semiconductor devices are disposed symmetrically.
摘要:
In a power supply device, the bridge circuit including a plurality of switching arms which is an inverse-parallel circuit of a semiconductor switch and a diode. The power supply device includes a control unit. The control unit switches the semiconductor switch such that a voltage v between AC terminals becomes a positive-negative voltage whose peak value is the voltage Vo between the DC terminals only during prescribed time periods before and after a point that has deviated from each zero crossing point ZCP of a current i by a prescribed compensation period φ and such that the voltage v between the AC terminals becomes a zero voltage during the other time periods, and sets the compensation period φ such that a time period during which the voltage v between the AC terminals becomes a zero voltage is the shortest.