A kind of compatible multicircuit intelligent electric power unit
Technical field
The present invention relates to power technique fields, relate to a kind of compatible multicircuit intelligent electric power unit in particular.
Technical background
Ballast is equipment fluorescent lamp playing metering function and produce instantaneous pressure, it on the iron core of silicon steel making, twines enamelled wire be made, and the coil of such ribbon core, when moment, ON/OFF powered on, self-induction will produce high pressure, be added on the electrode (filament) at the two ends of fluorescent tube.This action hockets, and when starter (jump bubble) is closed, the filament of fluorescent tube is by ballast current limliting conducting heating; When starter is opened a way, ballast self-induction will produce high pressure and be added on the two ends filament of fluorescent tube, and the phosphor powder of filament emission electronics bombardment tube wall is luminous, starter break-make several times repeatedly, action that will be repeatedly so several times, thus gets through fluorescent tube.When fluorescent tube normal luminous, internal resistance diminishes, and starter just remains open-circuit condition, and such electric current is just stable by fluorescent tube, ballast work, makes fluorescent tube normal luminous.Because ballast is when fluorescent lamp works, have electric current to pass through all the time, so easily produce vibration, and can generate heat, so there is the fluorescent lamp of ballast, particularly during ballast poor quality, very large sound can be produced, time grown, also easily burn.Ballast divides electric ballast and Inductive ballast.
Electric ballast and Inductive ballast carry out work for fluorescent tube, if because load characteristic is different when to be connected LED lamp with Inductive ballast by electric ballast, protection may appear in ballast, and power changes, and the phenomenon such as do not work.Different ballast output voltage difference is large, high reached at 400V, and low thirty or forty of only having lie prostrate, and LED power operating voltage does not on the market reach so wide, likely can burn out power supply or under-voltage protection; Because LED's is energy-conservation, long-lived, the advantage that environmental protection etc. are, traditional fluorescent lamp gradually replace by LED lamp, but when replacing conventional lamp by LED lamp, electric ballast and Inductive ballast must be taken off or disconnect electric ballast and Inductive ballast could work city's electrical connection LED lamp input, due to can not compatible ballast, bring many inconvenience, and add use cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of compatible multicircuit intelligent electric power unit.
For solving the problems of the technologies described above, the invention provides a kind of compatible multicircuit intelligent electric power unit, comprise power-supply system, described power-supply system comprises rectification circuit, change-over circuit, control circuit and voltage stabilizing circuit, change-over circuit is provided with between described rectification circuit and filter circuit, described change-over circuit comprises transformer, resistance sense element, electric capacity, polar capacitor, the node P1 of diode and circuit, P2, P3, P4 and P5, described transformer connects P1 and P2 respectively, resistance sense element is provided with between P1 and P3 be connected with transformer, described resistance sense element is made up of the resistance (2a) of parallel connection and inductance (2b), electric capacity is provided with between P2 and the P3 be connected with transformer, diode (5a) is provided with between described P2 and P4, polar capacitor (4a) is provided with between P3 and P4, polar capacitor (4b) is provided with between P2 and P5, diode (5c) is provided with between P3 and P5, diode (5b) is provided with between P4 and P5.
Further, described rectification circuit is made up of rectification main circuit, filter and inductance transformer, and described rectification main circuit is half-wave rectifying circuit, full-wave rectifying circuit and bridge rectifier one wherein.
Further, described transformer is low-frequency transformer, and the iron core of transformer adopts the silicon steel sheet of high permeability, and coiling group adopts Nylon, PBT or PET material to make.
Further, the built-in control chip of described control circuit, control circuit and drive circuit, described drive circuit adopts non-isolated constant current drive mode circuit.
Further, described voltage stabilizing circuit is linear voltage-stabilizing circuit or non-linear voltage stabilizing circuit.
Beneficial effect of the present invention is:
The present invention can compatible input voltage be electric ballast and the Inductive ballast of 5-400VAC by adding change-over circuit to the improvement of circuit; The angle of flow of input current is increased after adding change-over circuit, correct the input of power circuit, make power supply LED lamp when connecting or do not connect electric ballast, Inductive ballast all can stablize use, there is very strong versatility and compatibility, adopt non-isolated scheme simultaneously, power supply architecture simplicity of design, efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of multicircuit intelligent DC power supply of the preferred embodiment of the present invention.
Fig. 2 is the circuit theory diagrams of the change-over circuit of a kind of multicircuit intelligent DC power supply of the preferred embodiment of the present invention.
Wherein, 1, transformer, 2, resistance sense element, 3, electric capacity, 4, polar capacitor, 5, diode.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment also with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
As depicted in figs. 1 and 2, a kind of multicircuit intelligent DC power supply, comprise power-supply system, described power-supply system comprises rectification circuit, change-over circuit, control circuit and voltage stabilizing circuit, change-over circuit is provided with between described rectification circuit and filter circuit, described rectification circuit is made up of rectification main circuit, filter and inductance transformer, and described rectification main circuit is half-wave rectifying circuit, full-wave rectifying circuit and bridge rectifier one wherein; Described transformer (1) is low-frequency transformer, and the iron core of transformer (1) adopts the silicon steel sheet of high permeability, and coiling group adopts Nylon, PBT or PET material to make;
Described change-over circuit comprises transformer (1), resistance sense element (2), electric capacity (3), polar capacitor (4), the node P1 of diode (5) and circuit, P2, P3, P4 and P5, described transformer connects P1 and P2 respectively, resistance sense element (2) is provided with between P1 and P3 be connected with transformer, described resistance sense element (2) is made up of the resistance (2a) of parallel connection and inductance (2b), electric capacity (3) is provided with between P2 and the P3 be connected with transformer, diode (5a) is provided with between described P2 and P4, polar capacitor (4a) is provided with between P3 and P4, polar capacitor (4b) is provided with between P2 and P5, diode (5c) is provided with between P3 and P5, diode (5b) is provided with between P4 and P5.
The built-in control chip of described control circuit, control circuit and drive circuit, the control circuit of described control chip, control circuit and drive circuit composition intelligence, be used for regulating whole power circuit, described drive circuit adopts non-isolated constant current drive mode circuit, adopt non-isolated scheme, power supply architecture simplicity of design, efficiency is high.
Described voltage stabilizing circuit is linear voltage-stabilizing circuit or non-linear voltage stabilizing circuit, gets final product linear convergent rate, also can nonlinear object.
Adopt diode, inductance and electric capacity to coordinate composition in change-over circuit, control capacittance or inductance can improve EMI and PF value to power supply, adjust this part and have impact if power supply front end connects ballast to electric current and power; This correcting power factors circuit, need to use diode and electrochemical capacitor has coordinated, by changing the circuit efficiency in storage capacitance each charging and discharging stage, the distortion of input current can be improved widely, improve the power factor of power supply, the type of diode and the EMI of the capacitance of electrochemical capacitor on power supply have larger impact simultaneously.
Described rectification circuit is provided with two-way rectification circuit totally four inputs, and described every road rectification circuit is provided with holds the piezo-resistance of connecting with AC; Electric ballast is different with Inductive ballast kind, and output can be divided into two wires and four lines, and in order to make its two kinds all compatibilities, power supply adopts two-way rectification circuit to meet the demands at rectifier circuit portion; L-1, N-1, L-2, N-2 tetra-ports are used for the ballast that connection four line exports, if connect two lines to export ballast or civil power (L-1, N-1) (L-2, N-2) can optional one group as input, be provided with piezo-resistance simultaneously and can limit instantaneous pressure.
The impact of described power circuit on different ballast is different, needs the capacitance adjusting each element can compatible Most electronic ballast and Inductive ballast.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.