Abstract: A power conversion system is coupled between a power grid and a load. The power conversion system includes a battery, a first converter, a second converter and a DC/DC converter. The first converter is configured to selectively convert an input power from the power grid into a first charging power when the power grid is operated normally. The second converter is configured to convert the input power from the power grid into an output power when the power grid is operated normally. The DC/DC converter is electrically connected between the battery and the second converter. The DC/DC converter is configured to convert a storage power in the battery into a backup power when the power grid is not operated normally.

Abstract: A power conversion system is coupled between a power grid and a load. The power conversion system includes a battery, a first converter, a second converter and a DC/DC converter. The first converter is configured to selectively convert an input power from the power grid into a first charging power when the power grid is operated normally. The second converter is configured to convert the input power from the power grid into an output power when the power grid is operated normally. The DC/DC converter is electrically connected between the battery and the second converter. The DC/DC converter is configured to convert a storage power in the battery into a backup power when the power grid is not operated normally.

Abstract: A battery cell balance circuit includes an AC/DC converter, a plurality of battery cells, a plurality of switches, an isolated DC/DC converter, a circuit switch, and a control unit. The AC/DC converter receives an AC power. The battery cells are connected in series to form a battery link. Each switch is correspondingly connected to one battery cell. The isolated DC/DC converter is coupled to the switches and coupled to the battery link in series. The circuit switch is coupled between the AC/DC converter, the isolated DC/DC converter, and the plurality of switches. The control unit provides a plurality of control signals to correspondingly control the plurality of switches and the circuit switch.

Abstract: An energy regulation method for a fuel cell energy supply system including a plurality of fuel cell power generation modules, a plurality of power conversion modules, and a communication control module connected to the plurality of power conversion modules includes: calculating a parameter average value based on an energy state parameter of the fuel cell power generation module; calculating a compensation factor depending on the energy state parameter and the parameter average value; calculating a control parameter reference value of each of the power conversion modules based on a droop algorithm, and multiplying the control parameter reference value by the corresponding compensation factor to obtain a control parameter set value of the power conversion module; and regulating the corresponding fuel cell power generation modules depending on the control parameter set value.

Abstract: A light emitting element driving device includes a first energy storage element, a power source, and a converter circuit. The power source is electrically connected to the first energy storage element via the light emitting element in order to provide current to the light emitting element and to charge the first energy storage element. The converter circuit is electrically connected to the power source and the first energy storage element, and includes an inductance. When the converter circuit is in the first operational status, the first energy storage element charges the inductance. When the converter circuit is in the second operational status, the inductance is fed back to the power source.

Abstract: A sporting apparatus comprises a structure body, an endless belt, an electricity generating unit, a position sensing unit and a modulation unit for continuously outputting electricity as the sporting apparatus is continuously operated. The electricity generating unit transforms kinetic energy, which is transmitted from the endless belt, into electric power. The position sensing unit senses a position of a user on the endless belt so as to generate a sensing signal. The modulation unit includes a DC/AC inverter, a current sensing element, an inductor and a semiconductor switch with a controller. The current sensing element senses an armature current outputted from the electricity generating unit and outputs a signal to the controller. The controller controls the duty ratio of the semiconductor switch to control the armature current, so that the armature current is adjusted according to the sensing signal for controlling the rotation speed of the endless belt.

Abstract: A power drawing device using a single live wire includes a first and second mechanical switches, and a power drawing circuit, wherein the first mechanical switch includes a first contact connected to a live wire, a third contact connected to a first light adjusting circuit, and a fifth contact connected to the first light adjusting circuit; the second mechanical switch includes a first contact connected to the live wire, a third contact connected to a second light adjusting circuit, a fifth contact connected to the second light adjusting circuit, and a sixth contact connected to the first mechanical switch; and the power drawing circuit includes a first terminal connected to the live wire, a second terminal connected to the second mechanical switch, a third terminal connected to the first light adjusting circuit, and a fourth terminal connected to the second light adjusting circuit.

Abstract: A power drawing device using a single live wire includes a first and second mechanical switches, and a power drawing circuit, wherein the first mechanical switch includes a first contact connected to a live wire, a third contact connected to a first light adjusting circuit, and a fifth contact connected to the first light adjusting circuit; the second mechanical switch includes a first contact connected to the live wire, a third contact connected to a second light adjusting circuit, a fifth contact connected to the second light adjusting circuit, and a sixth contact connected to the first mechanical switch; and the power drawing circuit includes a first terminal connected to the live wire, a second terminal connected to the second mechanical switch, a third terminal connected to the first light adjusting circuit, and a fourth terminal connected to the second light adjusting circuit.

Abstract: A sporting apparatus comprises a structure body, an endless belt, an electricity generating unit, a position sensing unit and a modulation unit for continuously outputting electricity as the sporting apparatus is continuously operated. The electricity generating unit transforms kinetic energy, which is transmitted from the endless belt, into electric power. The position sensing unit senses a position of a user on the endless belt so as to generate a sensing signal. The modulation unit includes a DC/AC inverter, a current sensing element, an inductor and a semiconductor switch with a controller. The current sensing element senses an armature current outputted from the electricity generating unit and outputs a signal to the controller. The controller controls the duty ratio of the semiconductor switch to control the armature current, so that the armature current is adjusted according to the sensing signal for controlling the rotation speed of the endless belt.

Abstract: A permanent magnetic coupling device includes an conductor rotor, an permanent magnet rotor and permanent magnets. The permanent magnet rotor includes a magnetic ring. The magnetic ring includes protrusions and recesses arranged alternately, in which first airflow channels are formed between the protrusions and the conductor rotor respectively, and second airflow channels are formed between the recesses and the conductor rotor respectively. A cross-sectional area of each of the second airflow channels is greater than a cross-sectional area of each of the first airflow channels. The permanent magnet rotor further includes cavities disposed at the recesses, and the permanent magnets are engaged into the cavities respectively.

Abstract: A cylindrical permanent magnetic coupling device includes a conductor rotor and a permanent magnet rotor. The conductor rotor includes a bottom and a sidewall surrounding the bottom for defining a cavity, in which the cavity includes at least two different inner diameters. The permanent magnet rotor is arranged in the cavity for providing at least two different air gaps between the conductor rotor and the permanent magnet rotor.

Abstract: A sporting apparatus comprises a structure body, an endless belt, an electricity generating unit and a position sensing unit. The endless belt is disposed on the structure body. The electricity generating unit is disposed in the structure body and transforms kinetic energy, which is transmitted from the endless belt, into electric power. The position sensing unit is disposed in the structure body and senses a position of a user on the endless belt so as to generate a sensing signal. An armature current of the electricity generating unit is adjusted according to the sensing signal for controlling a rotation speed of the endless belt. A control method of the sporting apparatus is also disclosed.

Abstract: A side-edge type backlight module includes a first light-emitting unit, a second light-emitting unit, a first high-voltage connector unit and a second high-voltage connector unit. The first light-emitting unit has a first electrode and a second electrode. The second light-emitting unit has a third electrode and a fourth electrode. The fourth electrode is electrically connected to the second electrode of the first light-emitting unit. The first high-voltage terminal is electrically connected to the first electrode of the first light-emitting. The second high-voltage terminal is electrically connected to the third electrode of the second light-emitting unit.