摘要:
An AC-to-DC power supply apparatus and a power control structure and method thereof are provided. The provided method includes: making an AC-to-DC converter in the AC-to-DC power supply apparatus convert an AC input voltage in response to a driving signal, so as to generate a DC output voltage; sampling a rectified voltage relating to the AC input voltage, so as to provide a sampling signal; providing an output feedback signal relating to an output of the AC-to-DC converter; multiplying the sampling signal by the output feedback signal, so as to provide a product signal; performing a signal modulation on the product signal, so as to generate the driving signal to control a switching of a main power switch in the AC-to-DC converter; and performing an amplitude-limiting process on the sampling signal or the product signal.
摘要:
An AC-to-DC power supply apparatus and a power control structure and method thereof are provided. The provided method includes: making an AC-to-DC converter in the AC-to-DC power supply apparatus convert an AC input voltage in response to a driving signal, so as to generate a DC output voltage; sampling a rectified voltage relating to the AC input voltage, so as to provide a sampling signal; providing an output feedback signal relating to an output of the AC-to-DC converter; multiplying the sampling signal by the output feedback signal, so as to provide a product signal; performing a signal modulation on the product signal, so as to generate the driving signal to control a switching of a main power switch in the AC-to-DC converter; and performing an amplitude-limiting process on the sampling signal or the product signal.
摘要:
A non-isolated inverter including a DC input-side, a capacitor connected in parallel with the DC input-side, an AC output-side connected in parallel with a load, and first and second bridge-arm units is provided. The first and second bridge-arm units are connected in parallel with the capacitor. The first bridge-arm unit includes a series forward-connection of upper and lower switch-elements, where a common-node of upper and lower switch-elements and a supplying terminal of the second bridge-arm unit are respectively connected to two terminals of the AC output-side. The upper and lower switch-elements are respectively turned on in positive and negative half cycles of an output current of the non-isolated inverter, and the generation of common-mode currents in the non-isolated inverter is suppressed under a clamping action between the upper and lower switch-elements due to there are no high-frequency voltages on the parasitic-capacitors from the non-isolated inverter to the ground.
摘要:
A power supplying apparatus includes a rectifier and a first electromagnetic interference (EMI) filter. The rectifier receives and rectifies an alternating current (AC) input power for generating a direct current (DC) power. The first EMI filter receives the DC power through a first power input terminal and a first reference input terminal thereof. The first EMI filter filters the DC power for generating a DC output power between a first power output terminal and a first reference output terminal thereof. The first EMI filter includes an inductor module, a first X capacitor, and a first Y capacitor.
摘要:
A non-isolated inverter including a DC input-side, a capacitor connected in parallel with the DC input-side, an AC output-side connected in parallel with a load, and first and second bridge-arm units is provided. The first and second bridge-arm units are connected in parallel with the capacitor. The first bridge-arm unit includes a series forward-connection of upper and lower switch-elements, where a common-node of upper and lower switch-elements and a supplying terminal of the second bridge-arm unit are respectively connected to two terminals of the AC output-side. The upper and lower switch-elements are respectively turned on in positive and negative half cycles of an output current of the non-isolated inverter, and the generation of common-mode currents in the non-isolated inverter is suppressed under a clamping action between the upper and lower switch-elements due to there are no high-frequency voltages on the parasitic-capacitors from the non-isolated inverter to the ground.
摘要:
The disclosure provides a Femtocell network system coexistent with a universal mobile telecommunication system (UMTS) network and the deadzone effect alleviating method thereof. For each femto access point (FAP) in the Femtocell network system, a minimum transmission power is pre-configured. When an inadmissible user equipment (UE) performs a location update or a handoff process to obtain the access right to a closed FAP, at least a FAP gateway may estimate the probable existence of deadzone via the UE location update or handoff procedure. Before the inadmissible UE reaches the deadzone of the closed FAP, the transmission power of the closed FAP is decreased repeatedly to allow the inadmissible UE to receive the signals and messages from the UMTS network, until the closed FAP reaches a threshold of its minimum transmission power.
摘要:
The disclosure provides a Femtocell network system coexistent with a universal mobile telecommunication system (UMTS) network and the deadzone effect alleviating method thereof. For each femto access point (FAP) in the Femtocell network system, a minimum transmission power is pre-configured. When an inadmissible user equipment (UE) performs a location update or a handoff process to obtain the access right to a closed FAP, at least a FAP gateway may estimate the probable existence of deadzone via the UE location update or handoff procedure. Before the inadmissible UE reaches the deadzone of the closed FAP, the transmission power of the closed FAP is decreased repeatedly to allow the inadmissible UE to receive the signals and messages from the UMTS network, until the closed FAP reaches a threshold of its minimum transmission power.