CN104254170B - Dimmer - Google Patents
Dimmer Download PDFInfo
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- CN104254170B CN104254170B CN201310287453.2A CN201310287453A CN104254170B CN 104254170 B CN104254170 B CN 104254170B CN 201310287453 A CN201310287453 A CN 201310287453A CN 104254170 B CN104254170 B CN 104254170B
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- circuit module
- dimmer
- module
- electrically connected
- signal input
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
A dimmer comprises a power source module and a switch circuit module electrically connected with the power source module. The switch circuit module comprises at least one MOS (metal oxide semiconductor) tube and an intelligent driving circuit module electrically connected between the power source module and the switch circuit module, and the intelligent driving circuit module comprises a negative temperature coefficient thermosensitive resistor, a first resistor and a second resistor. The negative temperature coefficient thermosensitive resistor is arranged, and output resistance of the intelligent driving circuit module is decreased when temperature of the MOS tubes is increased or increased when temperature of the MOS tubes is decreased, so that input driving power is improved when switch converting speed of the MOS tubes is too slow, input driving power is lowered when switch converting speed of the MOS tubes is too high, the input driving power reaches a balance value finally, and the switch converting speed of the MOS tubes also reaches a balance value which enables the dimmer to pass EMC tests and reach temperature requirements.
Description
Technical field
The present invention relates to a kind of power-supply device, particularly a kind of dimmer being applied to high-power small size.
Background technology
In general daily life, all visible various luminaires everywhere, for example, daylight lamp, street lamp, desk lamp, skill
Art lamp etc..In above-mentioned luminaire, traditionally major part is as illuminating source with osram lamp.In recent years, due to section
Skill is maked rapid progress, by the use of light emitting diode (led) as light sources.Notably, in addition to luminaire, for general traffic number
Will, billboard, car light etc., are also changed to light emitting diode be used as illuminating source.As it was previously stated, being made using light emitting diode
For illuminating source, it is advantageous in that power saving, and brightness is bigger, therefore in using upper gradually generalization.
With the popularization of LED lamp, increasing occasion begins to use LED lamp, and for LED lamp, due to it
DC low-voltage feature is it is necessary to be equipped with, for it, the DC source being adapted.Meanwhile, with the raising of people's living standard and requirement,
People no longer meet the LED lamp of single brightness or color, and therefore, dimmer arises at the historic moment.However, in order to adapt to LED lamp
Power increases, and the output of dimmer is also increasing, but for attractive in appearance and assembling, volume but requires less and less.But
That, it may appear that two problems after the power of dimmer becomes greatly, one is that heating can increase considerably, i.e. the heating of mos pipe switch
Can increase considerably, two is that electromagnetic interference also can increase substantially, and these factors constrain setting of high-power small size dimmer
Meter and making.
Content of the invention
In view of this it is necessary to provide a kind of dimmer being applied to high-power small size, to meet the demand.
A kind of dimmer includes a power module, an on-off circuit module being electrically connected with this power supply, an electricity
Property be connected to intelligent drive circuit module between described power module and on-off circuit module, one with described on-off circuit mould
Block be electrically connected with overload protection sample circuit module, and one with described on-off circuit module electric connection anti-parasitism shake
Swing circuit module.Described on-off circuit module includes two mos field effect transistor.Described two metals
Oxide semiconductor field effect transistor is respectively used to the input of switching signal and the output of described dimmer.This intelligent drives electricity
Road module includes a negative tempperature coefficient thermistor, and a first resistor in parallel with this negative temperature coefficient heat-sensitive.Institute
State overload protection sample circuit module and the electric connection of one of described two mos field effect transistor,
Described antiparasitic circuit module is electrically connected with another mos field effect transistor, and described overload is protected
Shield sample circuit module includes two resistance, and this two resistant series are between described on-off circuit module and ground.
Compared with prior art, due to the presence of described negative tempperature coefficient thermistor, described intelligent drive circuit module
Output resistance with described mos field effect transistor temperature raise and reduce or temperature reduce and rise
Height, such that it is able to change the input driving power of described mos field effect transistor, and then makes when described
When the switch conversion speed of mos field effect transistor is too fast, reduces input driving power, and switch conversion
When speed is too slow, improve input driving power, finally this input driving power reaches an equilibrium valve, described metal-oxide half
The switch conversion speed of conductor field-effect transistor also reaches an equilibrium valve, and this equilibrium valve makes described dimmer can pass through
Emc test can reach the requirement of temperature again.
Brief description
Below in conjunction with Description of Drawings embodiments of the invention, wherein:
A kind of circuit block diagram of dimmer that Fig. 1 provides for the present invention.
Fig. 2 is the circuit theory diagrams of the dimmer of Fig. 1.
Specific embodiment
Below based on accompanying drawing, the specific embodiment of the present invention is further elaborated.It should be appreciated that this place is retouched
The specific embodiment stated is only used as embodiment, the protection domain being not intended to limit the present invention.
Refer to Fig. 1 and Fig. 2, it is a kind of circuit block diagram of dimmer 100 provided by the present invention and circuit theory diagrams.
Described dimmer 100 includes a power module 10, a shaping circuit module 11 being electrically connected with this power module 10, and one
The individual intelligent drive circuit module 12 being electrically connected with this shaping circuit module 11, one electric with this intelligent drive circuit module 12
Property the on-off circuit module 13 that connects, a load 14 being electrically connected with this on-off circuit module 13, one and described shaping
Circuit module 11 is electrically connected with and provides the signal input module 15 of control signal for this shaping circuit module 11.
Described load 14 can be LED lamp, or other light fixtures of being adapted, in the present embodiment, described loads as led
Light fixture.
Described power module 10 provides constant voltage source.It is understood, however, that providing electric power for this power module 10
Power supply can be the alternating current such as civil power, generating set, unidirectional current such as accumulator etc., and it to set as needed.Circuit from Fig. 2
Schematic diagram can be seen that this power module 10 utilizes two diodes d1, d2, and an electric capacity c1 its input power is entered
Peak is gone in row filtering, to export the constant voltage source that suitable described dimmer 100 uses.
Described shaping circuit module 11 includes three audions q1, q2, q3, and two resistance r3, r4, as shown in Figure 2
Circuit diagram.When the drive signal of the output of described signal input module 15 is low level, described audion q1, q2 will cut
Only, this shaping circuit module 11 is in cut-off state, and load 14 is that LED lamp no current does not work.When described signal input mould
When the output drive signal of block 15 is high level, described audion q1, q2 will turn on, and this shaping circuit module 11 is on shape
State, load 14 is started working.Described audion q1, q2, q3 except the switch as signal input also control signal input when
Between length.The conducting of described audion q1, q2 and cut-off need the Phase synchronization with the input current of power module 10, thus can
Control the size of the output of this dimmer 100 with the length by controlling the ON time of q1, q2, and then can achieve
Light modulation.
Described signal input module 15 can have the unit of data processing function for single-chip microcomputer or cpu etc., its according to
The requirement at family is programmed, sampling, data processing or being manually entered according to user, such as changes the means such as the size of resistance and comes
The output of the load 14 required for output user.The signal of described signal input module 15 output is control signal, that is, control
Make the size of the output of this dimmer 100.But the control signal due to the output of this signal input module 15 and power module
Pressure reduction is there is it is therefore desirable to isolating device is isolating, that is, signal as described below is defeated between the power supply signals of 10 outputs
Enter isolation circuit module 16.
Described dimmer 100 includes one and is electrically connected between described signal input module 15 and shaping circuit module 11
Signal input isolation circuit module 16, for isolating the control signal of described signal input module 15 and the electricity of power module 10
Source signal, that is, isolate the ground connection of the earth terminal of control signal of described signal input module 15 and the power supply signal of power module 10
End.Because there is voltage difference between the earth terminal of described control signal and the earth terminal of power supply signal, if this two earth terminals
Conducting, or will damage described signal input module 15 or damage power module 10.This signal input isolation circuit module 16
Including an optocoupler n1 in order to realize requirements above, optocoupler n1 is the electronics unit device known by those skilled in the art
Part, then this repeats no more.
Described intelligent drive circuit module 12 includes a negative tempperature coefficient thermistor ntc1, one and this negative temperature system
Number critesistor ntc1 first resistor r6 in parallel, and one and described negative tempperature coefficient thermistor ntc1 and first resistor
Second resistance r7 of r6 series connection.Described negative tempperature coefficient thermistor ntc1 (ntc:negative temperature
Coefficient it is) with metal-oxides such as manganese, cobalt, nickel and copper as main material, be fabricated by using ceramic process.This
A little metal oxide materials all have semiconductor property, because the semi-conducting material such as all fours germanium, silicon on electrically conducting manner.Should
Negative tempperature coefficient thermistor ntc is exactly when its temperature is low, carrier (the electronics and hole) number of these oxide materials
Few, so its resistance value is higher, but the rising with temperature, carrier number increases, so a kind of electricity that resistance value can reduce
Resistance.Described first, second resistance r6, r7 is a constant resistance, that is, have a constant resistance.Described intelligent drive circuit module
12 output resistance will be determined by the instant resistance of first resistor r6 and negative tempperature coefficient thermistor ntc1.Due to first resistor
R6 is arranged in parallel with negative tempperature coefficient thermistor ntc1, and the output resistance of therefore described intelligent drive circuit module 12 will be
Change between the resistance of one resistance r6 and the minimum resistance of negative tempperature coefficient thermistor ntc1.
Described on-off circuit module 13 includes two mos field effect transistor (metal-oxide-
Semiconductor field-effect transistor, abbreviation mos manage) q4, q5.This two mos pipe q4, q5 use respectively
In the input of Switching Power Supply signal and the output of dimmer 100.Described mos pipe q4, q5 are the main pyrotoxins of dimmer 100,
It is also the main occurring source that electromagnetic interference produces.The caloric value of mos pipe q4, q5 is mainly caused by switching loss, if mos pipe
Q4, q5 switch conversion speed is too fast, and it will produce very big electromagnetic wave, and the Conduction Interference therefore leading to dimmer 100 can be very big,
Emc testing emc (electro magnetic compatibility) cannot be passed through, therefore cannot do described greatly tune
The power of light device 100.And if mos pipe q4, q5 switch conversion speed is too slowly although very big electromagnetic wave will not be produced, electromagnetism
Compatibility test emc can be well solved, but the caloric value being caused by the switching loss of this mos pipe q4, q5 will very
Greatly, therefore in order to radiate it is necessary to the volume increasing dimmer 100 is beneficial to radiating, this is unfavorable for reducing the volume of dimmer again,
The reason therefore these reasons become dimmer of the prior art and cannot realize high-power small size.Also therefore when mos pipe q4,
It is desirable to can be slow by adjustment when q5 switch conversion speed is too fast, to be tested by emc, and works as mos pipe q4, q5 and switch
It is desirable to can be quicker by adjustment when conversion speed is too slow, to reduce its caloric value.And described intelligent drive circuit module 16
Effect be that this, described negative tempperature coefficient thermistor ntc1 is sticked on mos pipe q4 or q5, when mos pipe q4 or q5 temperature
During degree change, the instant resistance of this negative tempperature coefficient thermistor ntc also will change, and that is, when temperature raises, resistance reduces, and warm
Degree reduces, then resistance raises.When the switch conversion speed of mos pipe q4, q5 is too fast, the temperature of mos pipe q4, q5 reduces, subzero temperature
The instant resistance of degree coefficient resistance ntc1 will increase, and the output resistance of described intelligent drive circuit module 16 will be close to first
Resistance r6 and total resistance of second resistance r7, thus reducing the output driving power of shaping circuit module 11, and then will reduce mos
The switch conversion speed of pipe q4, q5, thus reduce electromagnetic interference.And when the switch conversion speed of mos pipe q4, q5 is too slow, mos
The temperature of pipe q4, q5 raises, and the instant resistance of negative tempperature coefficient thermistor ntc1 will reduce, described intelligent drive circuit module
16 output resistance by total resistance of instant resistance and second resistance r7 close to negative tempperature coefficient thermistor ntc1, thus carrying
The output driving power of high described shaping circuit module 11, and then improve the switch conversion speed of mos pipe q4, q5 so that mos manages
The caloric value of q4, q5 reduces.Therefore pass through to design described first resistor r6, negative tempperature coefficient thermistor ntc1 and second
The parameter of resistance r7, the switch conversion speed of described mos pipe q4, q5 can be made to reach one can be able to be reached by emc test again
To the equilibrium valve of temperature requirement, and the parameter of signal input module 15 need not be considered.Described in reaching as described mos pipe q4, q5
During equilibrium valve, the input driving power of described shaping circuit module also reaches an equilibrium valve, and this equilibrium valve makes described light modulation
Device 100 can reach the requirement of temperature by emc test again.It is understood, however, that the standard of described emc test and temperature
The requirement of degree is as needed as use occasion, the size of the output of dimmer 100, and the volume of this dimmer 100
Come to set, that is, it can be varied as desired the factors such as size.
Described dimmer 100 also includes an overload protection sample circuit module 17, this overload protection sample circuit module
17 are arranged between described on-off circuit module 13 and signal input module 15, for when loading 14 electric currents more than certain value, closing
Close this dimmer 100 protecting this dimmer 100 to be not damaged by, or output feedback signal give described signal input module 15 with
Allow signal input module 15 immediately to become more suitably to export.Described overload protection sample circuit module 17 include two resistance r9,
R10 and optocoupler n2.Described two resistance r9, r10 are used for overcurrent protection sampling and use, that is, big when loading 14 electric currents
When certain value default, then the voltage on two resistance r9, r10 exceedes this preset value, after this voltage is arrived by electric circuit inspection
Carry out subsequent action, such as close drive signal or change drive signal, to realize overload protection or short-circuit protection, make this dimmer
100 are not damaged by.Equally, the effect of described optocoupler n2 is also buffer action, that is, be used for isolating described signal input module
15 earth terminal and the earth terminal of this overload protection sample circuit module 17, burn each electronic component to avoid it to turn on.
Described dimmer 100 also include one be electrically connected between described on-off circuit module 13 and load 14 anti-post
Raw oscillating circuit 18.Unwanted oscillation refers to the vibration of non-operating frequency.Common unwanted oscillation has two kinds, that is, be less than operating frequency
Motorboating and higher than operating frequency high-frequency parasiticoscillation.The generation of unwanted oscillation, is due to mos pipe interpolar electricity
The distributed constant of appearance, lead-in inductance and the element such as lead, choke coil, capacitor constitutes oscillating circuit and produces.Parasitic
Vibration, as excluded not in time, can lead to burn oscillating tube.It is thus desirable to loading this antiparasitic circuit 18.In the present embodiment
In, described antiparasitic circuit 18 is electrically connected at the input of described on-off circuit module 13, and includes an inductance l1,
For the unwanted oscillation caused by on-off circuit module 13 described in choke suppress to reduce temperature and the shielding of this on-off circuit module 13
Electromagnetic interference, it is on the one hand to absorb unwanted oscillation energy using the electromagnetic induction principle of inductance, on the other hand destroys parasitism and shakes
Swing the phase relation of feedback, thus suppressing unwanted oscillation to occur.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Interior made any modification of god and principle, equivalent and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of dimmer, it includes a power module, and an on-off circuit mould being electrically connected with this power module
Block, described on-off circuit module include two mos field effect transistor it is characterised in that: described two gold
Belong to oxide semiconductor field effect transistor and be respectively used to the input of switching signal and the output of described dimmer, described dimmer
Also include an intelligent drive circuit module being electrically connected between described power module and on-off circuit module, one and institute
State the overload protection sample circuit module of on-off circuit module electric connection, and one is electrically connected with described on-off circuit module
The antiparasitic circuit module connecing, this intelligent drive circuit module includes a negative tempperature coefficient thermistor, one with should
Negative temperature coefficient heat-sensitive first resistor in parallel, described overload protection sample circuit module is partly led with described two metal-oxides
The electric connection of one of body field-effect transistor, described antiparasitic circuit module and another metal-oxide semiconductor (MOS)
Field-effect transistor is electrically connected with, and described overload protection sample circuit module includes two resistance, and this two resistant series are in institute
State between on-off circuit module and ground.
2. dimmer as claimed in claim 1 it is characterised in that: described power module provides constant voltage source.
3. dimmer as claimed in claim 1 it is characterised in that: described dimmer also includes a shaping circuit module, should
Shaping circuit module is electrically connected between described power module and intelligent drive circuit module with defeated to described power module
Go out power supply signal and be filtered shaping.
4. dimmer as claimed in claim 3 it is characterised in that: described shaping circuit module includes at least one audion,
This audion is used as the switch of signal input the time length of control signal input.
5. dimmer as claimed in claim 1 it is characterised in that: described dimmer also includes a signal input isolation circuit
Module, and the signal input module of an input being electrically connected at described signal input isolation circuit module, described letter
Number input module is used for the output to control this dimmer for described dimmer input drive signal, described signal input isolation electricity
Road module is used for isolating the control signal of described signal input module and the power supply signal of power module.
6. dimmer as claimed in claim 1 it is characterised in that: described intelligent drive circuit module also include one second electricity
Resistance, this second resistance is arranged in series with described negative tempperature coefficient thermistor and first resistor.
7. dimmer as claimed in claim 1 it is characterised in that: described first resistor has a constant resistance.
8. dimmer as claimed in claim 1 it is characterised in that: this overload protection sample circuit module be used for work as load current
During more than certain value, close this dimmer to protect this dimmer to be not damaged by.
9. dimmer as claimed in claim 1 it is characterised in that: described antiparasitic circuit module be used for choke suppress described in open
Unwanted oscillation caused by the circuit module of pass is to reduce temperature and the shielding electromagnetic interference of this on-off circuit module.
10. dimmer as claimed in claim 9 it is characterised in that: described antiparasitic circuit module includes an inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310287453.2A CN104254170B (en) | 2013-06-29 | 2013-06-29 | Dimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310287453.2A CN104254170B (en) | 2013-06-29 | 2013-06-29 | Dimmer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104254170A CN104254170A (en) | 2014-12-31 |
| CN104254170B true CN104254170B (en) | 2017-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310287453.2A Active CN104254170B (en) | 2013-06-29 | 2013-06-29 | Dimmer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104254170B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803729A (en) * | 2015-11-26 | 2017-06-06 | 国家电网公司 | Self-shield direct current motor drive circuit and direct current drive twist grinding machine |
| CN106982492B (en) * | 2017-04-19 | 2023-10-31 | 赛尔富电子有限公司 | Dimmer with overload protection circuit |
| CN111465141A (en) * | 2020-04-09 | 2020-07-28 | 深圳市时誉高精科技有限公司 | Alternating-current multi-path mutual-control dimmer |
| CN112332648B (en) | 2020-11-13 | 2022-09-27 | 山特电子（深圳）有限公司 | Device and method for actively balancing thermal performance of parallel power devices |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101427611A (en) * | 2006-04-10 | 2009-05-06 | 路创电子公司 | Load control device having a variable drive circuit |
| CN103052213A (en) * | 2012-11-30 | 2013-04-17 | 无锡中铂电子有限公司 | Circuit structure for controlling temperature rise of LED (Light-Emitting Diode) |
-
2013
- 2013-06-29 CN CN201310287453.2A patent/CN104254170B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101427611A (en) * | 2006-04-10 | 2009-05-06 | 路创电子公司 | Load control device having a variable drive circuit |
| CN103052213A (en) * | 2012-11-30 | 2013-04-17 | 无锡中铂电子有限公司 | Circuit structure for controlling temperature rise of LED (Light-Emitting Diode) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104254170A (en) | 2014-12-31 |
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Effective date of registration: 20161123 Address after: 315103 Ningbo national high tech Zone, Zhejiang, No. 1345 Applicant after: SELF ELECTRONICS CO., LTD. Address before: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Ningbo Purcell Electronics Ltd. Applicant before: Lin Wanjiong |
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