CN206237343U - A kind of resistance decompression protection circuit of capacitor of motor speed governing - Google Patents
A kind of resistance decompression protection circuit of capacitor of motor speed governing Download PDFInfo
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- CN206237343U CN206237343U CN201621319470.5U CN201621319470U CN206237343U CN 206237343 U CN206237343 U CN 206237343U CN 201621319470 U CN201621319470 U CN 201621319470U CN 206237343 U CN206237343 U CN 206237343U
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- circuit
- speed governing
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- capacitor
- decompression protection
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Abstract
The utility model is related to a kind of resistance decompression protection circuit of capacitor of motor speed governing.The circuit that purpose is to provide should be able to effectively prevent silicon controlled rectifier voltage from puncturing, and have the advantages that small volume, low cost.Technical scheme is：A kind of resistance decompression protection circuit of capacitor of motor speed governing, is serially connected in the loop that alternating current generator and external power source are formed；It is characterized in that：The circuit includes the MCU control module for being connected in parallel and being respectively provided with some branch circuits of silicon controlled module and be controlled to the silicon controlled module in each branch circuit；Some branch circuits include：Main split's circuit that one silicon controlled module is constituted and at least one by decompression protection resistance and speed governing electric capacity it is in parallel after the secondary branch circuit for constituting is concatenated with a silicon controlled module again.
Description
Technical field
The utility model is related to a kind of circuit, specifically a kind of speed regualtion of AC motor control circuit.
Background technology
Small household appliances speed regualtion of AC motor is mainly using tap electric machine speed regulation, common alternating current generator PWM speed governing, electric capacity governing etc.
Scheme.Tap motor needs customization, and gear speed to be fixed from changing, and defect is more obvious.Although PWM speed governing can make
With common electric machine, but AC noise is than larger, it is difficult to be useful on the relatively low product of noise requirements.
Electric capacity governing can use common alternating current generator, but also different capacitances may be selected to change gear regulation
Motor speed, while will not produce AC noise during operation, noise is significantly lower than thyristor speed control, and the program is widely used in
On the low product of noise requirements, such as air purifier, high-grade electric fan, ventilation fan.But it is easy that electric capacity governing there is also controllable silicon
The defect for puncturing is, it is necessary to further improve.
Utility model content
The purpose of this utility model is in overcoming the shortcomings of above-mentioned background technology, there is provided a kind of resistance of capacitor of motor speed governing
Decompression protection circuit, the circuit should be able to effectively prevent silicon controlled rectifier voltage from puncturing, and have the advantages that small volume, low cost.
The technical solution of the utility model is：
A kind of resistance decompression protection circuit of capacitor of motor speed governing, be serially connected in that alternating current generator and external power source formed returns
Lu Zhong；It is characterized in that：The circuit includes being connected in parallel and being respectively provided with some branch circuits of silicon controlled module and to every
The MCU control module that silicon controlled module in individual branch circuit is controlled；Some branch circuits include：One controllable silicon
Main split's circuit of module composition and at least one by decompression protection resistance it is in parallel with speed governing electric capacity after again with a controllable silicon mould
The secondary branch circuit that block concatenation is constituted.
The signal output part of the MCU control module connects the control in the silicon controlled main rectifier module in each branch circuit respectively
End processed.
The quantity of the secondary branch circuit is 1-5 bars.
The silicon controlled module includes a controllable silicon and passes through photoelectric coupling again after the signal of MCU control module is amplified
Device connects the transistor at SCR control end.
The beneficial effects of the utility model are：
The utility model increases a decompression protection resistance on each branch circuit, can effectively prevent silicon controlled rectifier voltage
Puncture；Meanwhile, circuit structure is simple, and (common metal film resistance or fixed carbon resister can be used as decompression protections for the general easy purchase of device
Resistance), and price is very cheap.Can be widely applied to the electric machine speed regulation of civilian small household appliances.
Brief description of the drawings
Fig. 1 is circuit structure diagram of the present utility model.
Fig. 2 is the circuit structure diagram of silicon controlled module in the utility model.
Specific embodiment
Below in conjunction with the embodiment shown in Figure of description, the utility model is described in further detail, but the utility model
It is not limited to following examples.
A kind of resistance decompression protection circuit of capacitor of motor speed governing as shown in Figure 1, the circuit be serially connected in alternating current generator with
And in the major loop of external power source formation, including MCU control module and some branch circuits.As illustrated, the present embodiment sets altogether
Four branch circuits.
One silicon controlled module is only set in the first branch circuit (main split's circuit), alternating current generator and external electrical is serially connected in
Between source.
In second branch circuit (secondary branch circuit), after the first decompression protection resistance R1 is in parallel with the first speed governing electric capacity C1,
It is connected in series with the first silicon controlled module again.
In second branch circuit (secondary branch circuit), after the second decompression protection resistance R2 is in parallel with the second speed governing electric capacity C2,
It is connected in series with the second silicon controlled module again.
In 3rd branch circuit (secondary branch circuit), after the 3rd decompression protection resistance R3 is in parallel with the 3rd speed governing electric capacity C3,
It is connected in series with the 3rd silicon controlled module again.
The control end of the silicon controlled module in four branch circuits connects an I/O port of MCU control module respectively
(signal output part), a certain bar branch circuit is enabled with according to the instruction of MCU control module.
Four silicon controlled modules are powered (omitted in the power module figure) with MCU control module by power module.
In four silicon controlled modules, power input (+5V_OUT1) connection power module, GND ends ground connection.
The silicon controlled module (buyable acquisition) includes a controllable silicon (TR1) and puts the signal of MCU control module
Access the transistor Q1 at SCR control end after big by isolation element (OPT01) again.
Also have in figure：Resistance R4, R5, R6；Piezo-resistance RT1.
The utility model sends control signal by operating MCU control module to silicon controlled module, can carry out opening shelves
The operations such as position (1 grade, 2 grades, 3 grades, 4 grades), different gear switches and closing gear, realize to alternating current generator open and close and gear
The control of speed regulation.Turn off the shutdown moment of operation or handover operation (such as in the second silicon controlled module), alternating current
The counter electromotive force of machine causes the energy supposition that the second speed governing electric capacity C2 is stored, and because the second decompression protection resistance R2 and second is adjusted
Loop is formed between fast electric capacity C2, the high-energy of generation just discharges transient energy by the loop, so as to avoid in controllable silicon mould
Block is punctured by instantaneous pressure, plays a very good protection.
MCU control module, silicon controlled module, speed governing electric capacity, the equal buyable of decompression protection resistance in the utility model are obtained
, silicon controlled module, speed governing electric capacity, decompression protection resistance can according to the power of alternating current generator and require gear speed choosing
Select corresponding parameter buying.
Claims (4)
1. a kind of resistance decompression protection circuit of capacitor of motor speed governing, is serially connected in the master time that alternating current generator and external power source are formed
Lu Zhong；It is characterized in that：The circuit includes being connected in parallel and being respectively provided with some branch circuits of silicon controlled module and to every
The MCU control module that silicon controlled module in individual branch circuit is controlled；Some branch circuits include：One controllable silicon
Main split's circuit of module composition and at least one by decompression protection resistance it is in parallel with speed governing electric capacity after again with a controllable silicon mould
The secondary branch circuit that block concatenation is constituted.
2. the resistance decompression protection circuit of capacitor of motor speed governing according to claim 1, it is characterised in that：The MCU controls
The signal output part of molding block connects the control end in the silicon controlled main rectifier module in each branch circuit respectively.
3. the resistance decompression protection circuit of capacitor of motor speed governing according to claim 2, it is characterised in that：The secondary branch
The quantity of circuit is 1-5 bars.
4. the resistance decompression protection circuit of capacitor of motor speed governing according to claim 3, it is characterised in that：The controllable silicon
Module is connected by photoelectrical coupler (OPT01) again after including a controllable silicon (TR1) and amplifying the signal of MCU control module
The transistor (Q1) at SCR control end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621319470.5U CN206237343U (en) | 2016-12-02 | 2016-12-02 | A kind of resistance decompression protection circuit of capacitor of motor speed governing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621319470.5U CN206237343U (en) | 2016-12-02 | 2016-12-02 | A kind of resistance decompression protection circuit of capacitor of motor speed governing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206237343U true CN206237343U (en) | 2017-06-09 |
Family
ID=58978709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621319470.5U Active CN206237343U (en) | 2016-12-02 | 2016-12-02 | A kind of resistance decompression protection circuit of capacitor of motor speed governing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206237343U (en) |
-
2016
- 2016-12-02 CN CN201621319470.5U patent/CN206237343U/en active Active
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