The invention relates to a voltage self-adapting solar charger with an MPPT (Maximum Power Point Tracking) function and an application method of the voltage self-adapting solar charger. The voltage self-adapting solar charger comprises a solar cell panel, a DC-DC (Direct Current-Direct Current) conversion module and an MPPT control module, wherein a control end of the DC-DC conversion module is connected with the MPPT control module; an input end of the DC-DC conversion module is connected with an anode-cathode end of the solar cell panel; an output end of the DC-DC module is connected with an anode-cathode end of portable charging equipment; the MPPT control module comprises an MCU (Micro Controller Unit), a first voltage detection unit, a second voltage detection unit, a temperature measurement unit, an auxiliary power supply and a liquid crystal display unit that are connected with the MCU; the auxiliary power supply and the first voltage detection unit are connected with the anode-cathode end of the solar cell panel; and the second voltage detection unit is connected with the anode-cathode end of the portable charging equipment. The charger has a voltage self-adapting function, a high solar energy utilization rate and high charging speed, and can charge various portable equipment cells.

Voltage self-adapting solar charger with MPPT (Maximum Power Point Tracking) function and application method of voltage self-adapting solar charger

The invention provides a lighting control method, a lighting device and a lighting system. The lighting control method comprises the steps of detecting a connection state of a wireless network component of the lighting device; and controlling the operating state of a lighting component of the lighting device according to the connection state. According to the scheme provided by the invention, the lighting component is controlled according to the connection state of the wireless network component through the lighting device provided with the wireless network component, the lighting component is turned on automatically when a terminal is connected to the wireless network component, that is, when a user is located within a coverage range of the lighting device, and the user does not need to adopt any control measures, thereby being capable of realizing lighting control timely, reliably and conveniently, and also being capable of providing wireless network signals for the user.

Lighting control method, lighting device and lighting system

A rectifying circuit including: between a first terminal of application of an AC voltage and a first rectified voltage delivery terminal, at least one first diode; and between a second terminal of application of the AC voltage and a second rectified voltage delivery terminal, at least one first anode-gate thyristor, the anode of the first thyristor being connected to the second rectified voltage delivery terminal; and at least one first stage for controlling the first thyristor, including: a first transistor coupling the thyristor gate to a terminal of delivery of a potential which is negative with respect to the potential of the second rectified voltage delivery terminal; and a second transistor connecting a control terminal of the first transistor to a terminal for delivering a potential which is positive with respect to the potential of the second rectified voltage delivery terminal, the anode of the first thyristor being connected to the common potential of voltages defined by said positive and negative potentials.

Rectifier circuit with thyristors

The invention provides a photovoltaic independent intelligent power supply system and power supply method. The system comprises a photovoltaic module, a maximum power point tracking (MPPT), a storage battery group, an inverter, a multi-stage chopper, a DC bridge circuit, a control driving circuit, a self power up maintenance module and an alarm. A photovoltaic array provides stable voltage input for a DC bridge through MPPT output via a boost chopping circuit; the storage battery group is connected to the DC bridge via a bidirectional chopping circuit; DC bridge output comprises AC and DC output respectively via the inverter and the chopper; work of the whole main circuit is controlled via the control driving circuit, and charge and discharge of the storage battery is controlled via a battery management system; and the self power up maintenance module can ensure system reliability under bad weather situation. The photovoltaic independent intelligent power supply system and power supply method, through reasonable configuration of the modules, are advantageous in that, a modularized structure is used for a circuit, energy utilization rate is high, reliability is high, service lifetime of the storage battery is prolonged, capacity increase or decrease of the system is facilitated, and power supply for AC/DC loads can be performed uninterruptedly.

Photovoltaic independent intelligent power supply system and power supply method

The invention discloses an ARM control-based solar mobile phone charging power supply system. A Buck topological structure of a transposition switch tube is adopted by a main circuit; an optimal gradient hysteresis comparison improvement method is adopted by software design to achieve control on MPPT, so that the mobile phone charging function is achieved, rapid and efficient utilization of solar energy is achieved and the requirement of charging a mobile phone by people in the absence of an AC power supply outside is met. The circuit structure is simple; the control method is flexible; the power supply system is convenient to carry and low in cost; effective maximum power tracking for a solar cell can be achieved; and the mobile phone is efficiently and reliably charged around the clock.

ARM control-based solar mobile phone charging power supply system

The invention discloses an LCL filtering-based circuit topology structure of a high-power PWM (pulse-width modulation) rectifier. The circuit topology structure of the PWM rectifier comprises a single-phase PWM rectifier and a PWM rectifier adopting a three-phase and four-wire system; a better filtering effect is achieved by replacing the traditional L filter with an LCL filter; a PWM rectifier control method is based on the pulse width modulation technology of an SPWM (sinusoidal pulse width modulation) mode, and a control mode for a voltage outer loop and a current inner loop is adopted; a PI control mode is adopted by the common voltage outer loop and the independent current inner loop, and P and I parameters are respectively set for the common voltage outer loop and the independent current inner loop. According to the LCL filtering-based circuit topology structure disclosed by the invention, current and voltage cophasing at the grid side can be realized, so that the harmonic content of the grid side is reduced, and the harmonic pollution is reduced.

LCL filtering-based circuit topology structure of large-power PWM (pulse-width modulation) rectifier

The utility model relates to a voltage adaptive solar energy charger with a MPPT function; the voltage adaptive solar energy charger comprises a solar cell panel, a DC-DC conversion module and a MPPT control module; a control end of the DC-DC conversion module is connected with the MPPT control module; an input end of the DC-DC conversion module is connected with positive and negative polarity ends of the solar cell panel; an output end of the DC-DC module is connected with positive and negative polarity ends of portable charging equipment; the MPPT control module comprises a MCU control unit, and a first voltage detection unit, a second voltage detection unit, a temperature detection unit, an auxiliary power supply and a liquid crystal display unit all connected with the MCU control unit; the auxiliary power supply and the first voltage detection unit are connected with the positive and negative polarity ends of the solar cell panel; the second voltage detection unit is connected with the positive and negative polarity ends of the portable charging equipment. The voltage adaptive solar energy charger has voltage adaptive function, is high in solar utilization rate, fast in charging speed, and can charge a plurality of portable instrument cells.

Voltage adaptive solar energy charger with MPPT function

The utility model discloses a circuit topology structure of a pulse width modulation (PWM) rectifier The circuit topology structure of the PWM rectifier comprises a single-phase PWM rectifier and a three-phase four-wire PWM rectifier, wherein only one inductor is needed in the main topology of the single-phase PWM rectifier, and only three inductors are needed in the main topology of the three-phase four-wire PWM rectifier The control method of the PWM rectifier is based on the sinusoidal pulse width modulation (SPWM) technology, and a voltage outer loop and current inner loop control method is employed The public voltage outer loop and the independent current inner loop both employ a PI control method, and the P and I parameters are set respectively for the public voltage outer loop and the independent current inner loop With the circuit topology structure, in-phase of the current and voltage at a power grid side is achieved, the harmonic wave content at the power grid side is reduced, and harmonic wave pollution is reduced

Circuit topology structure of PWM rectifier

The utility model relates to a topology structure with a peak voltage inhibition function of a solar energy charging device; the topology structure comprises a solar cell, an access protection unit, a synchronization rectification Buck unit, a Buck circuit protection unit, a storage battery anti-over charge unit, a storage battery, a load over-current protection unit and a load; the solar cell, the access protection unit, the synchronization rectification Buck unit, the Buck circuit protection unit, the storage battery anti-over charge unit and the storage battery are connected to form a charge main loop; the storage battery, the load over-current protection unit and the load are connected in series to from a discharge loop; the synchronization rectification Buck unit, the Buck circuit protection unit, the storage battery anti-over charge unit and the storage battery are connected to form a discharge loop; the topology structure with the peak voltage inhibition function of the solar energy charging device can effectively reduce circuit loss, improves electric energy transition efficiency, simultaneously and effectively improves reliability of the Buck circuit, can effectively protect the solar energy cell panel, the storage battery and the topology circuit itself, and can effectively prevent peak pulse.

Teng Chunyang

Papers

Voltage self-adapting solar charger with MPPT (Maximum Power Point Tracking) function and application method of voltage self-adapting solar charger

LCL filtering-based circuit topology structure of large-power PWM (pulse-width modulation) rectifier

Voltage adaptive solar energy charger with MPPT function

Circuit topology structure of PWM rectifier

Topology structure with peak voltage inhibition function of solar energy charging device