CN200941596Y - Governing signal inputting circuit of d.c. brush-less dynamo - Google Patents
Governing signal inputting circuit of d.c. brush-less dynamo Download PDFInfo
- Publication number
- CN200941596Y CN200941596Y CNU2006200573324U CN200620057332U CN200941596Y CN 200941596 Y CN200941596 Y CN 200941596Y CN U2006200573324 U CNU2006200573324 U CN U2006200573324U CN 200620057332 U CN200620057332 U CN 200620057332U CN 200941596 Y CN200941596 Y CN 200941596Y
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- China
- Prior art keywords
- motor
- controller
- speed
- optical coupler
- linear amplification
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Abstract
The utility model relates to a DC brushless motor speed adjusting signal input circuit which prolongs life time of the motor, comprising a controller, a linear amplification optical coupler and two partial voltage resistors. Characterized in that two end of one partial voltage resistor are connected in parallel to a capacitor, two ends of another partial voltage resistor are connected in parallel to the blocking alarming signal of the controller, the output of two partial voltage resistors and the linear amplification optical coupler are connected in series.
Description
Technical field
The utility model relates to a kind of dc brushless motor speed-regulating signal input circuit.
Background technology
Existing dc brushless motor speed-regulating signal input circuit as shown in Figure 1; controller (integrated circuit---do not draw among the figure) add a constant voltage at the A point; speed-regulating signal is a d. c. voltage signal; it is sent into through input in; after two resistance R, enter linear amplification optical coupler U again; the current potential height that controller is ordered according to B carries out speed governing to motor; general design is; the current potential that reference point A is ordered is 3V; when test point B point current potential is higher than 2.8V; controller control motor is shut down, when B point current potential is lower than 1V controller control motor at full speed, and when B point current potential greater than 1V during less than 2.8V controller control motor and be in lower-speed state and move.The shortcoming of this dc brushless motor speed-regulating signal input circuit is: if motor when starting as the d. c. voltage signal of speed-regulating signal too high (wishing the motor high speed operation), then in moment of electric motor starting, voltage major part through the input of A point is added on the sample resistance R0, the hypopotenia that B is ordered, controller control this moment motor is status triggering at full speed, thereby make the starting current of motor too high, time one length must shorten the useful life of motor.As at the stall state, the temperature rise of motor, CMOS pipe will be very high, and the CMOS pipe is easy to damage.
Summary of the invention
The purpose of this utility model be for solve exist in the existing dc brushless motor speed-regulating signal input circuit may shorten the motor problem in useful life, and provide a kind of and can not shorten motor useful life, dc brushless motor speed-regulating signal input circuit simple in structure.
Technical scheme:
The purpose of this utility model is achieved in that a kind of dc brushless motor speed-regulating signal input circuit, comprise controller, linear amplification optical coupler and two divider resistances, it is characterized in that electric capacity in parallel at divider resistance two ends, the stall alarm signal pin of another divider resistance two ends parallel controller, two divider resistances and the series connection of linear amplification optical coupler output.The divider resistance parallel connection behind the electric capacity, because the voltage at electric capacity two ends can not raise suddenly, another divider resistance of having connected between optical coupler and the ground, this resistance again with the stall alarm signal pin parallel connection of controller, so in electric motor starting moment, motor does not change, alarm signal is output as high level, the current potential that the current potential of sampling point B is ordered near A, so, motor will treat that the alarm signal output low level is with following divider resistance R13 short circuit after the motor rotation with low rate start, the current potential that B is ordered is owing to the effect of shunt capacitance begins progressively to raise, treat to enter normal operating condition again after electric capacity in parallel is full of electricity, the starting process of motor is approximately soft start-up process, has prevented that the starting current of motor is excessive.Another benefit that has increased this electric capacity is that even the voltage of speed-regulating signal raises suddenly, and the current potential of test point can not suddenly change because of the effect of electric capacity yet.
Described dc brushless motor speed-regulating signal input circuit, it is characterized in that the power supply of described linear amplification optocoupler and divider resistance by one independently stabilized voltage power supply provide but not the reference voltage of controller.
Beneficial effect:
Owing to adopted technical scheme described in the utility model; motor is when starting; the detected speed-regulating signal of controller is by electric capacity and the of short duration inhibition of divider resistance; and enter the impact of motor when the voltage of speed-regulating signal raises suddenly after the user mode; the electric capacity that also is connected in parallel on the sample resistance two ends absorbs; the current potential of test point is smoothly risen, protected motor effectively, can prolong the useful life of motor.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of existing dc brushless motor speed-regulating signal input circuit.
Fig. 2 is the schematic diagram of the embodiment of dc brushless motor speed-regulating signal input circuit described in the utility model when being applied on the dc brushless motor.
Among the figure R represent the numeral of resistance, back be the numbering, it is numbering that C represents the numeral of electric capacity, back, it is numbering that D represents the numeral of diode, back, ZD is a voltage stabilizing didoe, U1, U2, be integrated package, U3 is the linear amplification optical coupler, and it is numbering that Q represents the numeral of power tube, back, L is a motor coil, and Vin, FG are the speed-regulating signal inputs.
Embodiment:
See Fig. 2, dc brushless motor speed-regulating signal input circuit described in the utility model comprises the divider resistance R12 of controller (integrated package U1), linear amplification optical coupler U3 and sampling usefulness etc., at divider resistance R12 two ends shunt capacitance C4; Meet another divider resistance R13 between linear amplification optocoupler U3 and the ground, the contact between linear amplification optical coupler and the divider resistance R13 connects the stall alarm signal pin 12 of controller U1.When electric motor starting or stall, the pin 12 of controller U1 is high level (output pin 12 that is controller is unsettled), the 3V of controller U1 pin 5 outputs compares current potential through divider resistance R12 and R13 dividing potential drop, current potential on the pin 6 drops to the partial pressure potential of resistance R 12 and resistance R 13 gradually from 3V (identical with the current potential of pin 5 outputs), motor is started by low speed, controller detects electric motor starting after to a certain degree, export a low level at pin 12 places again, the detection current potential of pin 6 is further descended, motor speed is further improved and enter user mode.Equally, when the speed-regulating signal voltage of sending into through Vin and FG increases suddenly, the current potential on the pin 6 on the controller U1 can not suddenlyd change, can only gradual change.
Wherein the model of U1 is HW300B, and the model of U2 is ZXBM1015.
Claims (1)
1, a kind of dc brushless motor speed-regulating signal input circuit, comprise controller, linear amplification optical coupler and two divider resistances, it is characterized in that electric capacity in parallel at divider resistance two ends, the stall alarm signal pin of another divider resistance two ends parallel controller, two divider resistances and the series connection of linear amplification optical coupler output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200573324U CN200941596Y (en) | 2006-04-03 | 2006-04-03 | Governing signal inputting circuit of d.c. brush-less dynamo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200573324U CN200941596Y (en) | 2006-04-03 | 2006-04-03 | Governing signal inputting circuit of d.c. brush-less dynamo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200941596Y true CN200941596Y (en) | 2007-08-29 |
Family
ID=38747770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200573324U Expired - Fee Related CN200941596Y (en) | 2006-04-03 | 2006-04-03 | Governing signal inputting circuit of d.c. brush-less dynamo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200941596Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281032A (en) * | 2010-06-10 | 2011-12-14 | 高玉琴 | Speed regulator for single-phase motor |
-
2006
- 2006-04-03 CN CNU2006200573324U patent/CN200941596Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281032A (en) * | 2010-06-10 | 2011-12-14 | 高玉琴 | Speed regulator for single-phase motor |
| CN102281032B (en) * | 2010-06-10 | 2014-08-06 | 高玉琴 | Speed regulator for single-phase motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20120403 |