CN210958871U - Comprehensive performance tester for electronic ballast - Google Patents

Abstract

The utility model relates to the field of test instruments, and discloses an electronic ballast comprehensive performance tester, which comprises a singlechip, an adjustable and controllable alternating current power supply, an electronic ballast, an output voltage detection circuit, a keyboard, a display module, a power supply module, a switching circuit, a normal lamp tube, a rectification effect analog circuit, a lamp holder leakage analog circuit and a high-power low-impedance resistor; the power supply module comprises a direct current power supply, a first diode, a first switch, a first unidirectional thyristor, a first triode, a second resistor, a second unidirectional thyristor, a first resistor, a first capacitor, a second triode, a third potentiometer, a fourth resistor and a voltage output end, wherein the direct current power supply is respectively connected with the anode of the first diode, the anode of the first unidirectional thyristor, the collector of the first triode and the anode of the second unidirectional thyristor. Implement the utility model discloses, following beneficial effect has: the circuit has high safety and reliability and meets the requirement of safe power supply.

Description

Comprehensive performance tester for electronic ballast

Technical Field

The utility model relates to a test instrument field, in particular to electronic ballast comprehensive properties tester.

Background

Along with the promotion of green lighting engineering, the wide use of electronic ballast, electricity-saving lamp, the producer more and more pays attention to the quality of product, this has just put forward higher requirement to detecting instrument, and electronic ballast, electricity-saving lamp are started late in china, and its corresponding check-out test set's research development is also late, though at present there are several enterprises in production efficiency instrument, but most price is expensive, and many producers can't bear, and the operation is complicated, and it is inconvenient to use, and many occasions receive the limitation. In the prior art, some electronic ballast comprehensive performance testers can support reliability tests on electronic ballasts with different powers and rated voltages, adapt to different requirements of various occasions, and can well simulate various different bulb fault conditions, so that the response of the electronic ballasts to different states of bulb faults and the change of various parameters are tested, and the reliability tests of the electronic ballasts are guaranteed. However, the power supply part of the power supply circuit is not suitable for safe power supply due to the lack of corresponding circuit protection functions, such as the lack of current limiting protection function, which causes the safety and reliability of the circuit to be low.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide the electronic ballast comprehensive properties tester that the security and the reliability of a circuit are higher, accord with the requirement of safe power supply.

The utility model provides a technical scheme that its technical problem adopted is: a comprehensive performance tester of an electronic ballast is constructed, which comprises a single chip microcomputer, an adjustable and controllable alternating current power supply, the electronic ballast, an output voltage detection circuit, a keyboard, a display module, a power supply module, a switching circuit, a normal lamp tube, a rectification effect analog circuit, a lamp holder leakage analog circuit and a high-power low-impedance resistor, wherein the input end of the adjustable and controllable alternating current power supply is connected with the output end of the single chip microcomputer, the output end of the adjustable and controllable alternating current power supply is connected with the input end of the electronic ballast, the output end of the electronic ballast is respectively connected with the input end of the output voltage detection circuit and the input end of the switching circuit, the output end of the output voltage detection circuit is connected with the input end of the single chip microcomputer, the output end of the keyboard is connected with the input end of the single chip microcomputer, and the, the output end of the power supply module is connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the input end of the switching circuit, and the output end of the switching circuit is respectively connected with the normal lamp tube, the rectification effect analog circuit, the lamp holder leakage analog circuit and the high-power low-impedance resistor;

the power supply module comprises a direct current power supply, a first diode, a first switch, a first unidirectional thyristor, a first triode, a second resistor, a second unidirectional thyristor, a first resistor, a first capacitor, a second triode, a third potentiometer, a fourth resistor and a voltage output end, the direct current power supply is respectively connected with the anode of the first diode, the anode of the first unidirectional thyristor, the collector of the first triode and the anode of the second unidirectional thyristor, the cathode of the first diode is connected with the control electrode of the first unidirectional thyristor through the first switch, the cathode of the first unidirectional thyristor is respectively connected with the base of the first triode and one end of the second resistor, and the other end of the second resistor is respectively connected with the emitter of the first triode and one end of the second capacitor, The collecting electrode of second triode, a stiff end of third potentiometre with the voltage output end is connected, the negative pole of second unidirectional thyristor respectively with the one end of first resistance with the other end of second electric capacity is connected, the control pole of second unidirectional thyristor respectively with the one end of first electric capacity with the projecting pole of second triode is connected, the base of second triode with the slip end of third potentiometre is connected, another stiff end of third potentiometre with the one end of fourth resistance is connected, the other end of first resistance respectively with the other end of first electric capacity with the other end of fourth resistance is connected.

In the electronic ballast comprehensive performance tester of the present invention, the model of the first diode is S-202T.

In the electronic ballast comprehensive performance tester of the present invention, the power supply module further includes a second diode, an anode of the second diode is connected to an emitter of the second triode, and a cathode of the second diode is connected to one end of the first capacitor.

In the electronic ballast comprehensive performance tester of the present invention, the model of the second diode is E-123.

In the electronic ballast comprehensive performance tester of the present invention, the first transistor is an NPN transistor.

In the electronic ballast comprehensive performance tester of the present invention, the second triode is an NPN-type triode.

In the electronic ballast comprehensive performance tester of the present invention, the model of the first unidirectional thyristor and the model of the second unidirectional thyristor are 2N 6565.

Implement the utility model discloses an electronic ballast comprehensive properties tester has following beneficial effect: owing to be equipped with the singlechip, adjustable controllable alternating current power supply, electronic ballast, output voltage detection circuitry, the keyboard, display module, power module, switching circuit, normal fluorescent tube, rectification effect analog circuit, lamp stand electric leakage analog circuit and high-power low impedance resistance, the source module includes DC power supply, first diode, first switch, first unidirectional thyristor, first triode, the second resistance, second unidirectional thyristor, first resistance, first electric capacity, the second triode, the third potentiometre, fourth resistance and voltage output end, first diode is used for carrying out the current-limiting protection, consequently the utility model discloses the security and the reliability of circuit are higher, accord with the requirement of safe power supply.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the electronic ballast comprehensive performance tester of the present invention;

fig. 2 is a schematic circuit diagram of the power supply module in the embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the embodiment of the electronic ballast comprehensive performance tester of the present invention, a schematic structural diagram of the electronic ballast comprehensive performance tester is shown in fig. 1. In fig. 1, the electronic ballast comprehensive performance tester comprises a single chip microcomputer 1, an adjustable controllable alternating current power supply 2, an electronic ballast 3, an output voltage detection circuit 4, a keyboard 5, a display module 6, a power supply module 7, a switching circuit 8, a normal lamp tube 9, a rectification effect analog circuit 10, a lamp holder leakage analog circuit 11 and a high-power low-impedance resistor 12, wherein the input end of the adjustable controllable alternating current power supply 2 is connected with the output end of the single chip microcomputer 1, the output end of the adjustable controllable alternating current power supply 2 is connected with the input end of the electronic ballast 3, the output end of the electronic ballast 3 is respectively connected with the input end of the output voltage detection circuit 4 and the input end of the switching circuit 8, the output end of the output voltage detection circuit 4 is connected with the input end of the single chip microcomputer 1, the output end of the keyboard 5 is connected with the input end of the single chip microcomputer, the output end of the power module 7 is connected with the input end of the single chip microcomputer 1, the output end of the single chip microcomputer 1 is connected with the input end of the switching circuit 8, and the output end of the switching circuit 8 is respectively connected with the normal lamp tube 9, the rectification effect analog circuit 10, the lamp holder leakage analog circuit 11 and the high-power low-impedance resistor 12.

The adjustable and controllable alternating current power supply 2 provides a working power supply for the electronic ballast 3, and the adjustable and controllable alternating current power supply 2 is adopted to control the output voltage and is used for testing the electronic ballasts with different powers and rated voltages. The output voltage detection circuit 4 converts the output voltage of the electronic ballast 3 into a low voltage. The output voltage detection circuit 4 is used for replacing different working states of the bulb and simulating the influence of aging or damage of the lamp tube on the electronic ballast 3.

The switching circuit 8 is of the type FZ200R65KF 1. The commutation effect simulation circuit 10 is used to simulate the effect of arc currents caused by lamp aging, which are often inconsistent in successive half cycles. The lamp socket leakage simulation circuit 11 is used for simulating abnormal working states of the lamp socket, such as leakage, short circuit and open circuit.

When different signals are input by an external keyboard 5, the single chip microcomputer 1 controls the adjustable controllable alternating current power supply 2 and the switching circuit 8, then the output voltage detection circuit 4 transmits the reaction of the electronic ballast 3 in different states of the HID lamp failure to the single chip microcomputer 1, and finally the specific operation state of the electronic ballast 3 is displayed on the display module 6 under the control of the single chip microcomputer 1. Due to the adoption of the external display equipment, the working state of the electronic ballast 3 under different fault states of the bulb can be monitored in real time, so that the electronic ballast 3 can be comprehensively known in performance, and certain help is provided for the electrical maintenance of the electronic ballast 3.

In this embodiment, the single chip microcomputer 1, the adjustable and controllable ac power supply 2, the electronic ballast 3, the output voltage detection circuit 4, the keyboard 5, the display module 6, the switching circuit 8, the normal lamp 9, the rectification effect analog circuit 10, the lamp socket leakage analog circuit 11, and the high-power low-impedance resistor 12 are all implemented by using the structure in the prior art, and the working principle thereof is also the working principle in the prior art, which is not described herein.

Fig. 2 is a schematic circuit diagram of the power supply module in this embodiment, in fig. 2, the power supply module 7 includes a dc power source VCC, a first diode D1, a first switch S1, a first unidirectional thyristor U1, a first triode Q1, a second resistor R2, a second unidirectional thyristor U2, a first resistor R1, a first capacitor C1, a second capacitor C2, a second triode Q2, a third potentiometer RP3, a fourth resistor R4 and a voltage output Vo, wherein the dc power source VCC is respectively connected to an anode of the first diode D1, an anode of the first unidirectional thyristor U1, a collector of the first triode Q1 and an anode of the second unidirectional thyristor U2, a cathode of the first diode D1 is connected to a control electrode of the first unidirectional thyristor U1 through the first switch S1, a cathode of the first unidirectional thyristor U1 is respectively connected to a base of the first triode Q1 and a terminal of the second resistor R69556, and an emitter of the first resistor R828653 of the first thyristor Q8427 is respectively connected to a cathode of the second triode Q8427, One end of a second capacitor C2, a collector of a second triode Q2, one fixed end of a third potentiometer RP3 and a voltage output end Vo are connected, a cathode of a second unidirectional thyristor U2 is respectively connected with one end of a first resistor R1 and the other end of a second capacitor C2, a control electrode of the second unidirectional thyristor U2 is respectively connected with one end of a first capacitor C1 and an emitter of the second triode Q2, a base of a second triode Q2 is connected with a sliding end of the third potentiometer RP3, the other fixed end of the third potentiometer RP3 is connected with one end of a fourth resistor R4, and the other end of the first resistor R1 is respectively connected with the other end of the first capacitor C1 and the other end of the fourth resistor R4.

In this embodiment, the first diode D1 is a current limiting diode for current limiting protection. The current limiting protection principle is as follows: when the electric current of the branch road that first diode D1 belongs to is great, can reduce the size of the electric current of the branch road that first diode D1 belongs to through this first diode D1, make it keep at normal operating condition, and be unlikely to because of the electric current too big component in leading to burning out the circuit, consequently the utility model discloses the security and the reliability of circuit are higher, accord with the requirement of safe power supply. It should be noted that in the present embodiment, the first diode D1 has a model number S-202T. Of course, in practical applications, the first diode D1 may also be another type of diode with similar functions.

The working principle of the power module 7 is as follows: the first unidirectional thyristor U1, the first triode Q1 and the second resistor R2 form an overcurrent detection protection circuit, the second unidirectional thyristor U2, the second triode Q2, the first resistor R1, the second capacitor C2 and other components form an overvoltage detection protection circuit, the first diode D1 and the first switch S1 form a starting control circuit, when the load (the single chip microcomputer 1) is normal, the first switch S1 is pressed, the control electrode of the first unidirectional thyristor U1 is triggered and conducted, the output voltage of the voltage output end Vo supplies power to the load, because the voltage at two ends of the second resistor R2 is not enough to conduct the first triode Q1, the load works normally, when the load is heavy due to short circuit or other faults, the voltage drop at two ends of the second resistor R2 is increased, when the voltage of a gate line of the first triode Q1 is exceeded, the first triode Q1 is conducted, the first unidirectional U1 is cut off because the current is smaller than the on-maintaining current, when the first triode Q1 is turned on, the current flowing through the first unidirectional thyristor U1 and the second resistor R2 bypasses, so that the first unidirectional thyristor U1 is cut off, the first triode Q1 is also cut off, and the power supply is cut off, thereby achieving the purpose of overcurrent protection.

When the voltage of the direct current power supply VCC rises and exceeds an overvoltage critical value, the output voltage of the corresponding voltage output end Vo also rises, the voltage divided by the fourth resistor R4 and the third potentiometer RP3 rises, the second triode Q2 is turned on, the second unidirectional thyristor U2 is turned on accordingly, the voltage at the two ends of the second capacitor C2 is added to the two ends of the first unidirectional thyristor U1 through the second unidirectional thyristor U2, so that the first unidirectional thyristor U1 is turned off due to the reverse voltage, the power supply load is cut off, after the second unidirectional thyristor U2 is turned on, the current flowing through the first resistor R1 is small due to the large resistance, the conduction of the second unidirectional thyristor U2 cannot be maintained, and therefore the second unidirectional thyristor U2 is turned off accordingly, and the circuit recovers the initial state.

In this embodiment, the first unidirectional thyristor U1 and the second unidirectional thyristor U2 are both 2N6565 in type.

In this embodiment, the first transistor Q1 is an NPN transistor, and the second transistor Q2 is an NPN transistor. Certainly, in practical applications, the first transistor Q1 and the second transistor Q2 may both adopt PNP transistors, but the circuit structure is also changed accordingly.

In this embodiment, the power module 7 further includes a second diode D2, an anode of the second diode D2 is connected to an emitter of the second transistor Q2, and a cathode of the second diode D2 is connected to one end of the first capacitor C1. The second diode D2 is a current limiting diode for current limiting protection of the emitter current of the second transistor Q2. The current limiting protection principle is as follows: when the emitter current of the second triode Q2 is large, the second diode D2 can reduce the emitter current of the second triode Q2 to keep the second triode Q2 in a normal working state, so that the elements in the circuit are not burnt out due to too large current, and the safety and reliability of the circuit are further enhanced. It should be noted that in the present embodiment, the second diode D2 has a model number E-123. Of course, in practical applications, the second diode D2 may also be another type of diode with similar functions.

In a word, in this embodiment, because the current-limiting diode is arranged in the power module 7, the circuit of the present invention has high safety and reliability, and meets the requirement of safe power supply.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An electronic ballast comprehensive performance tester is characterized by comprising a single chip microcomputer, an adjustable and controllable alternating current power supply, an electronic ballast, an output voltage detection circuit, a keyboard, a display module, a power supply module, a switching circuit, a normal lamp tube, a rectification effect simulation circuit, a lamp holder leakage simulation circuit and a high-power low-impedance resistor, wherein the input end of the adjustable and controllable alternating current power supply is connected with the output end of the single chip microcomputer, the output end of the adjustable and controllable alternating current power supply is connected with the input end of the electronic ballast, the output end of the electronic ballast is respectively connected with the input end of the output voltage detection circuit and the input end of the switching circuit, the output end of the output voltage detection circuit is connected with the input end of the single chip microcomputer, the output end of the keyboard is connected with the input end of the single chip microcomputer, and the input end of the display module, the output end of the power supply module is connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the input end of the switching circuit, and the output end of the switching circuit is respectively connected with the normal lamp tube, the rectification effect analog circuit, the lamp holder leakage analog circuit and the high-power low-impedance resistor;

the power supply module comprises a direct current power supply, a first diode, a first switch, a first unidirectional thyristor, a first triode, a second resistor, a second unidirectional thyristor, a first resistor, a first capacitor, a second triode, a third potentiometer, a fourth resistor and a voltage output end, the direct current power supply is respectively connected with the anode of the first diode, the anode of the first unidirectional thyristor, the collector of the first triode and the anode of the second unidirectional thyristor, the cathode of the first diode is connected with the control electrode of the first unidirectional thyristor through the first switch, the cathode of the first unidirectional thyristor is respectively connected with the base of the first triode and one end of the second resistor, and the other end of the second resistor is respectively connected with the emitter of the first triode and one end of the second capacitor, The collecting electrode of second triode, a stiff end of third potentiometre with the voltage output end is connected, the negative pole of second unidirectional thyristor respectively with the one end of first resistance with the other end of second electric capacity is connected, the control pole of second unidirectional thyristor respectively with the one end of first electric capacity with the projecting pole of second triode is connected, the base of second triode with the slip end of third potentiometre is connected, another stiff end of third potentiometre with the one end of fourth resistance is connected, the other end of first resistance respectively with the other end of first electric capacity with the other end of fourth resistance is connected.

2. The electronic ballast combination property tester as claimed in claim 1, wherein the first diode has a model number of S-202T.

3. The electronic ballast comprehensive performance tester as claimed in claim 1, wherein the power module further comprises a second diode, an anode of the second diode is connected to an emitter of the second triode, and a cathode of the second diode is connected to one end of the first capacitor.

4. The electronic ballast comprehensive performance tester as claimed in claim 3, wherein the second diode is of type E-123.

5. The electronic ballast comprehensive performance tester of any one of claims 1 to 4, wherein the first triode is an NPN-type triode.

6. The electronic ballast combination property tester of any one of claims 1 to 4, wherein the second triode is an NPN type triode.

7. The electronic ballast comprehensive performance tester as claimed in any one of claims 1 to 4, characterized in that the first unidirectional thyristor and the second unidirectional thyristor are both 2N6565 in model.

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