 Bus voltage control using gated fixed energy pulses |
| OF THE INVENTION Referring to FIG. 1A, a functional block diagram is illustrated of a power bus ... |
|
| Single wire radio to charger communications method |
| This invention is a method by which the charging status of a battery can be transmitted from a ... |
|
| Line-powered, phase-control circuit |
| We claim: 1. A line-powered power supply circuit, comprising: a source of an AC, mains supply ... |
|
| Self-compensating switching power converter |
| . The invention provides self-compensating resonant switching high voltage power converters which ... |
|
| Uninterruptible power supply with AC and DC power inputs |
| It is an object of the present invention to overcome or at least mitigate the disadvantages of ... |
|
| Position control using variable exciter feed through |
| We claim: 1. A motor generator system comprising: a prime mover for driving an output shaft; a main ... |
|
| Switch drive controller, method of operation thereof and power converter employing the same |
| To overcome the deficiencies of the prior art, the present invention provides, for use with a power ... |
|
| Power factor corrector |
| The present invention is directed to a device that reduces harmonics at low cost and high ... |
|
| Circuit and device for protecting secondary battery |
| I claim: 1. A battery protective circuit incorporated in a rechargeable battery, comprising: a ... |
|
|
Multi-mode renewable power converter system
| Details |
Inventors: Sung, Chang-Che;
Assignee: Phoenixtec Power Co., Ltd. (Taipei, TW)
Primary Examiner: Tso; Edward H.
Assistant Examiner:
Attorney, Agent or Firm: Pelton, Esq.; William E.
A multi-mode renewable power converter system is disclosed. The system includes a control unit, a boost converter, an inverter and optional bi-directional charger, wherein the boost converter converts DC output of a solar cell or a renewable source to high DC bus voltage, and the inverter converts this DC bus voltage to an AC output. This power converter can be used to support standalone load or grid-connected system with a dynamic maximum power point tracking (MPPT) circuit. The MPPT circuit detects the current and voltage from the solar cell and indicates to the inverter to provide power to the load connected. When the optional bi-directional charger is installed, the MPPT signal is also fed to this charger to make the power efficiency maximized for the system. |
|
DETAILED DESCRIPTION The main object of the present invention is to provide a multi-mode renewable power converter system that is able to convert DC power from PV array to AC to suit the different power requirements for both standalone load and grid-connected systems.
The architecture of the renewable power converter system in accordance with the present invention includes a control unit, a boost converter, an inverter and an optional bi-directional charger.
The control unit has incorporated a MPPT circuit used for continuously tracking the power output from the system and provides necessary control so as to make the optimal usage of the renewable power source.
The MPPT circuit detects the current and/or voltage from the PV array and orders the inverter to provide the necessary power to supply the standalone load and grid-connected system.
The boost converter is to convert the DC output to high DC bus voltage.
The inverter is to convert the DC bus voltage to AC voltage output for the standalone load or AC current for grid-connected applications.
If an optional bi-directional charger is installed, it can be operated in bi-directionally for charging the storage battery or delivering high voltage output to the DC bus.
The use of an optional bi-directional charger depends on the type of load connected and whether the inverter is installed with a storage battery.
The above mentioned renewable power converter first analyses the power requirement for the connected loads, and then monitors the distribution of power output from the renewable power source to the bi-directional charger and the inverter through the DC bus in accordance with an appropriate ratio.
If the inverter is installed with a storage battery, the control unit monitors the power distribution to the bi-directional charger and the inverter.
The control unit continuously checks the power output from the renewable source, and if it is insufficient, it orders the bi-directional charger to make connection with the storage battery to provide the necessary power to the inverter, which then in turn converts it to AC voltage for the load
|
| Related patents |
|
|
Integrated conductance and load test based electronic battery tester
An electronic battery tester for testing a storage battery includes first and second Kelvin connections configured to couple to the battery. A forcing function applies a ...
|
|
|
Data acquisition instrument architecture with flexible data acquisition, processing and display
In accordance with the preferred embodiment of the present invention an electronic instrument includes instrument hardware. A data acquisition engine schedules time ...
|
|
|
Motor control using third harmonic stator voltage signal
A number of inventions are described herein. The invention of this application provides a system for controlling a BPM motor utilizing the third harmonic component of ...
|
|
|
Method and system for controlling an alternator to optimize direct current output
What is claimed is: 1. For use with an alternator having a stator winding including a plurality of coils and a first output and a second output, the alternator further ...
|
|
|
Power supply system
The present invention is made in light of the foregoing problems, and it is an object of the present invention to provide a power supply system including a semiconductor ...
|
|
|
Generating apparatus for providing different rated output voltages to a plurality of electric loads
The present invention is made in view of the above problems, and has a main object of providing a generating apparatus which is able to supply high-voltage loads and low-...
|
|
|
Sensorless power angle control for a vehicle alternator
An alternator of present invention comprises a field winding, stator windings, a controlled full wave rectifier bridge (i.e., an "active" bridge), and a dc output. The ...
|
|
|
Regulation system for a permanent magnet generator
What is claimed is: 1. A regulation system for a permanent magnet generator for generating electrical power and for supplying the electrical power to a load, the ...
|
|
|
Battery charging apparatus and method with charging mode convertible function
It is therefore an object of the present invention to provide an improved mode convertible battery charging process and battery charger. It is another object to provide ...
|
|
|
Power supply control circuit that adjusts output power based on variable input power
First, in accordance with the present invention, a power supply can attain a maximum output while preventing damage to an external power supply even when the external ...
|
|
|
Electrical and Wave 
