摘要:
A heat dissipation structure of a semiconductor device is provided, the semiconductor device including: an electrical bonding surface electrically connected to a substrate; and a heat dissipation surface as an opposite side of the electrical bonding surface. The heat dissipation surface makes contact with a heat spreader via a conductive TIM while the heat spreader makes contact with a heat sink via an insulating TIM. A surface of the heat spreader facing the semiconductor device includes a recess part formed in at least one part in a vicinity of an outer periphery of the semiconductor device.
摘要:
A power control apparatus includes: a first conversion apparatus that applies DC/DC conversion to direct current power from a power generator for generating power using natural energy, and outputs the resultant power; a second conversion apparatus that applies DC/DC conversion to the power output from the first conversion apparatus and charges a power storage unit with the resultant power, and also applies DC/DC conversion to power from the power storage unit and discharges the resultant power; a third conversion apparatus that supplies alternating current power to a power system and an alternating current load by applying DC/AC conversion to the power output from the first conversion apparatus and/or the power discharged by the second conversion apparatus; and a controller that causes the second conversion apparatus to perform the discharge so that the power output from the third conversion apparatus is higher than power consumed by the alternating current load.
摘要:
The present disclosure relates to a charge power control apparatus, a charge power control method, a program, and a solar power generation system, for improving charge efficiency. A solar power generation system includes a solar panel that receives sunlight to generate power, a PV power conditioner that performs DC/AC conversion of the power generated by the solar panel, and a charging AC/DC converter that performs AC/DC conversion of power output from the PV power conditioner and charges a storage battery. Voltage of the power supplied to the PV power conditioner from the solar panel is acquired while the power supplied from a power system is stopped, and a change in power supplied to the PV power conditioner from the solar panel is obtained according to the voltage. Charge power that is output from the charging AC/DC converter to charge the storage battery is adjusted based on the change in voltage.
摘要:
Provided is a power converter which is applied to a power converter equipped with a switching element provided on a line, and a radiator connected to a predetermined potential such as a ground potential. A noise eliminator in which a conductive member is covered with insulator is provided between the switching element (semiconductor switch) and the radiator (heatsink). A conductive member of the noise eliminator is connected to a stable potential.
摘要:
A low-voltage circuit in a bidirectional DC-DC converter converts output AC power from a high-voltage circuit to DC power to charge a smoothing reactor and discharge the smoothing reactor, and includes an active snubber circuit including switching elements and each having a backward diode and a snubber capacitor. The snubber capacitor of the active snubber circuit has its one end connected to a drain end of the switching elements, and has its other end connected to a node between a center tap of a high-frequency transformer and a smoothing reactor.
摘要:
An inverter circuit provided in a power conversion device includes a full-bridge inverter, and a short circuit part. The short circuit part includes switching elements and clamp elements connected to the switching elements. The clamp elements suppress application of an excessive voltage such as a surge voltage to the switching elements.
摘要:
A power control apparatus includes: a direct current bus serving as a path for supplying direct current power; a first conversion apparatus that applies DC/DC conversion to direct current power from a power generator for generating power using natural energy, and outputs the resultant direct current power to the direct current bus; a second conversion apparatus that applies DC/DC conversion to the direct current power and charges a power storage unit with the resultant direct current power, and also applies DC/DC conversion to direct current power from the power storage unit and discharges the resultant direct current power to the direct current bus; a third conversion apparatus that applies DC/AC conversion to the direct current power from the direct current bus and supplies alternating current power to a power system and an alternating current load; and a controller that controls driving of the first to third conversion apparatuses.
摘要:
The present disclosure relates to a charging control device, a solar power generation system and a charging control method which allow more efficient charging. The charging control device includes: a charging converter which takes electric power out of a solar panel and converts the electric power to a voltage required for charging a storage battery; and a controlling CPU which adjusts an output voltage that is outputted from the charging converter. The charging converter takes electric power out of the solar panel at two operation points where the electric power can be taken out of the solar panel with a certain output voltage, and charges the storage battery. The controlling CPU adjusts the output voltage in accordance with a voltage difference between input voltages respectively corresponding to the two operation points. The present technique is applicable, for example, to the charging control device of the solar power generation system.
摘要:
A driver circuit controls a first switch element. A first resistor is connected between the driver circuit and the first switch element. A second switch element is connected to the first switch element. An overcurrent detector circuit controls the second switch element based on an overcurrent current flowing through the first switch element. A second resistor is connected between the overcurrent detector circuit and the second switch element. The first and second resistor is set such that a turn-off time of the first switch element when the second switch element is turned on by the overcurrent detector circuit is longer than a turn-off time of the first switch element when the first switch element is turned off by the driver circuit.
摘要:
A current resonant type DC voltage converter includes: a switching circuit configured to generate an AC voltage from a DC input voltage; a LC resonance circuit configured to resonate in response to application of the AC voltage to a resonant capacitor and a resonant coil; a transformer having a primary side connected in series to the LC resonance circuit; a parallel resonant inductance present in parallel to the transformer; a rectifier circuit configured to rectify a current appearing on a secondary side of the transformer to generate a DC output voltage; and a parallel resonant inductance adjustment circuit configured to change the parallel resonant inductance.