CN2468258Y

CN2468258Y - Electronic stabilizing device

Info

Publication number: CN2468258Y
Application number: CN 01200547
Authority: CN
Inventors: 李庆忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-01
Filing date: 2001-02-01
Publication date: 2001-12-26
Anticipated expiration: 2011-02-01

Abstract

The utility model relates to an electronic stabilizing device for providing exciting bias currents for sufficiently driving power tubes, comprising a high resistance element, a frequency conversion / power amplification hoop, and a low voltage frequency conversion rectifying hoop. The electronic stabilizing device can generate a low voltage and low current exciting bias current for starting the power tubes under the condition of dc low voltage or dc high voltage, and a low voltage bias current is supplied to continuously drive the power tubes; the effect of the lowest temperature rise can be obtained on an entire circuit.

Description

Electronic ballast

The relevant a kind of electronic ballast of the utility model is used for providing the low pressure bias current of enough driving power pipes under dc low-voltage or high direct voltage environment.

Please refer to Fig. 1, traditional electrical minor stabilizer is 30 formations of output transformer (T1) that had one first coil 31, one second coil 32 and a tertiary coil 33 by a frequency conversion loop 20 and, and wherein this frequency conversion/power amplification loop 20 comprises a biasing resistance (R1) 21, one first anti-sense coil (L1) 22, one the 4th anti-sense coil (L4) 24, a first transistor (IR1) 25, a transistor seconds (TR2) 26 and one second electric capacity (C2) 27; One power tube 40 series connection, one starting capacitance 41 is parallel to the tertiary coil 33 of this output transformer 30; It produces the mode of bias current, be that DC power supply 10 is obtained high pressure through this frequency conversion loop 20 earlier, obtain by this output transformer (T1) 30 direct step-downs then, because power tube 40 needs bigger low pressure bias current, so this biasing resistance 21 is because of the factor of voltage difference, can produce high temperature and big power consumption, so, above-mentioned electronic circuit can't be useful on the high-voltage power circuit.

The purpose of this utility model is to address the above problem and a kind of electronic ballast is provided, and is enough to the low pressure bias current of driving power pipe in order to produce one under dc low-voltage or high direct voltage environment.

The purpose of this utility model is achieved in that a kind of electronic ballast, and in order to starting and drive a power tube, it is characterized in that: include at least: an output transformer, its secondary side are to dispose a low-voltage coil and a loop that lights a lamp of boosting; One frequency conversion/power amplification loop is a primary side of being located at this output transformer; One low-voltage variable frequency commutating circuit is connected in this low pressure line chart, exports a low pressure bias current in order to drive this power tube; And a high value element, be connected in a first node and a Section Point place with this frequency conversion/power amplification loop and this low-voltage variable frequency commutating circuit respectively, excite bias current to start this power tube in order to produce one.

Wherein this high value element is a resistance.

Wherein more dispose a constant-current source between this high value element and this low-voltage variable frequency commutating circuit.

Wherein more dispose a constant pressure source between this high value element and this low-voltage variable frequency commutating circuit.

Electronic ballast of the present utility model, it comprises a high value element, one frequency conversion/power amplification loop and a low-voltage variable frequency commutating circuit at least, wherein the high value element is to be connected in first node with frequency conversion/power amplification loop, in order to the bias current that excites of low pressure and low stream to be provided at starting power Guan Shixian, the low-voltage variable frequency commutating circuit then is after the power tube starting, mode via the circuit feedback makes frequency conversion/power amplification loop continue supply one low pressure bias current driving power pipe, and reaches the effect of lowest temperature rise simultaneously.

Describe the purpose of this utility model, structure, feature and effect thereof in detail below in conjunction with accompanying drawing:

Fig. 1 is the circuit diagram of traditional electrical minor stabilizer.

Fig. 2 is the calcspar of the utility model first embodiment.

Fig. 3 is the circuit diagram of the utility model first embodiment.

Fig. 4 is the calcspar of the utility model second embodiment.

Fig. 5 is the circuit diagram of the utility model second embodiment.

As Fig. 2, shown in Figure 3, the electronic ballast that the utility model disclosed, a boost frequency conversion/power amplification loop 20a and the low-voltage variable frequency commutating circuit 90 that loop 80, has one first diode 28 of lighting a lamp of low-voltage coil 34, an EMI filtering/rectifier 50, of being located at these output transformer 30 secondary sides by a high value element 23, formed, wherein this loop 80 that lights a lamp of boosting is that the tertiary coil 33 that is parallel to this output transformer 30 again constitutes by this power tube 40 series connection one starting capacitance 41; 90 of this low-voltage variable frequency commutating circuits include: one second diode (D2) 92 and second filter capacitor 93 of connecting with this second diode 92; One end of this high value element 23 is to be connected in a first node 29 other ends with this frequency conversion/power amplification loop 20a then to be connected in a Section Point 94 with this low-voltage variable frequency commutating circuit 90; Power supply 10 is earlier via the bridge rectifier 51 in this EMI filtering/rectifier 50, and one first filter capacitor, 52 rectifications, send into this frequency conversion/power amplification loop 20a again, this moment is by this high value element 23, this frequency conversion/power amplification loop 20a will start this power tube 40 by the bias current that excites of these output transformer 30 supply one low pressure and low stream, simultaneously will produce an induced current at this low-voltage coil 34, and this induced current is through this second diode 92, after the rectification of this second filter capacitor 93, just can obtain a low pressure and the bias current of enough driving powers is arranged, push away power tube 40, so the biasing resistance 21 in this frequency conversion/power amplification loop 20 just can not be because of the factor of voltage difference, produce high temperature and big power consumption, just can reach the effect of lowest temperature rise thus.

Please refer to Fig. 4, second embodiment of the electronic ballast of the present utility model that Fig. 5 institute chamber shows, be by a high value element 23, one is located at the low-voltage coil 34 of these output transformer 30 secondary sides, one EMI filtering/rectifier 50, one power factor correction loop 60, one constant-current source 70, one the boosts loop 80 that lights a lamp, one frequency conversion/power amplification loop 20a, and one low-voltage variable frequency commutating circuit 90 form, wherein this power factor correction loop 60 includes one the 4th diode (D4) 61, one the 5th diode (D5) 62, one the 6th diode (D6) 63, and one the 3rd filter capacitor 64; This constant-current source 70 is to be connected in one the 3rd node 65 and this Section Point 94 with this high value element 23, this low-voltage variable frequency commutating circuit 90 respectively, by one the 3rd transistor (TR3) 71, one the 3rd resistance (R3) 72, receive diode (ZD1) 73, one the 3rd 74 of diodes (D3) season and form; When power supply 10 after via these EMI filtering/rectifier 50 rectifications, send into this power factor correction loop 60 earlier, carry out the adjustment of input power factor, to produce required current source, and then send into this frequency conversion/power amplification loop 20a, this moment is by this high value element 23, this frequency conversion/power amplification loop 20a will start this power tube 40 by the bias current that excites of these output transformer 30 supply one low pressure and low stream, simultaneously, to produce an induced current at this low-voltage coil 34, and this induced current just passes through this Section Point 94, enters constant-current source 70, and then produces a low pressure and the bias current of enough driving powers is arranged, push away power tube 40, so the biasing resistance 21 in this frequency conversion/power amplification loop 20 just can not produce high temperature and big power consumption because of the factor of voltage difference, and can reach the effect of lowest temperature rise; And by the setting of this constant-current source 70, more can make to power supply, voltage, and the variation of load all can make automatic adaptation, this constant-current source 70 in above-mentioned also can be a constant pressure source.

Claims

1, a kind of electronic ballast, in order to starting and drive a power tube, it is characterized in that: include at least: an output transformer, its secondary side are to dispose a low-voltage coil and a loop that lights a lamp of boosting; One frequency conversion/power amplification loop is a primary side of being located at this output transformer; One low-voltage variable frequency commutating circuit is connected in this low pressure line chart, exports a low pressure bias current in order to drive this power tube; And a high value element, be connected in a first node and a Section Point place with this frequency conversion/power amplification loop and this low-voltage variable frequency commutating circuit respectively, excite bias current to start this power tube in order to produce one.

2, electronic ballast as claimed in claim 1 is characterized in that: wherein this high value element is a resistance.

3, electronic ballast as claimed in claim 1 is characterized in that: wherein more dispose a constant-current source between this high value element and this low-voltage variable frequency commutating circuit.

4, electronic ballast as claimed in claim 1 is characterized in that: wherein more dispose a constant pressure source between this high value element and this low-voltage variable frequency commutating circuit.