CN208754211U - The stepless speed regulation circuit of power spraye - Google Patents
The stepless speed regulation circuit of power spraye Download PDFInfo
- Publication number
- CN208754211U CN208754211U CN201821644828.0U CN201821644828U CN208754211U CN 208754211 U CN208754211 U CN 208754211U CN 201821644828 U CN201821644828 U CN 201821644828U CN 208754211 U CN208754211 U CN 208754211U
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- CN
- China
- Prior art keywords
- mcu
- electric motor
- speed regulation
- regulation circuit
- power spraye
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Direct Current Motors (AREA)
- Nozzles (AREA)
Abstract
The utility model discloses a kind of stepless speed regulation circuit of power spraye, the electric motor of the power spraye connects power supply by the positive and negative electrode of battery pack, and the stepless speed regulation circuit includes stepless time adjustment switch, LDO, MCU and metal-oxide-semiconductor；The stepless time adjustment switch adjusts the operating voltage of electric motor by swept resistance, the swept resistance of stepless time adjustment switch is also connected with MCU, swept resistance acquires the voltage of electric motor, and the metal-oxide-semiconductor is connected on the cathode supply lines of battery pack, and MCU connection controls the duty ratio of metal-oxide-semiconductor.The stepless speed regulation circuit of power spraye provided by the utility model, by controlling the switch duty of MOS, when real-time detection motor both ends limited voltages value adjusts duty ratio to reach the motor constant pressure purpose for having feedback to MCU, can be realized the step-less adjustment of power spraye；It determines whether motor occurs stall by judging motor operation current value, if it happens, then tunes up MOS switch duty ratio, so that cut-out pressure switchs, realize the auxiliary protection of motor lock-rotor.
Description
Technical field
The utility model relates to power spraye, in particular to a kind of stepless speed regulation circuit of power spraye.
Background technique
Existing power spraye currently on the market is adjusted the speed when general by gear, prevent sprinkling dosage is from more free
It adjusts.When motor constant pressure value is lower, fountain head is closed, and motor lock-rotor and revolving speed are not enough to cut-out pressure switch, to can burn
Bad motor.
Utility model content
The utility model aim is: providing a kind of stepless speed regulation circuit of power spraye, realizes the nothing of power spraye
Grade adjusts and the auxiliary protection of motor lock-rotor.
The technical solution of the utility model is:
A kind of stepless speed regulation circuit of power spraye, the electric motor of the power spraye is by the positive and negative of battery pack
Pole connection power supply, the stepless speed regulation circuit includes stepless time adjustment switch, LDO, MCU and metal-oxide-semiconductor；The stepless time adjustment switch is logical
The operating voltage that swept resistance adjusts electric motor is crossed, stepless time adjustment switch ends are separately connected the anode and LDO of electric motor
Input terminal, LDO output end provide operating voltage to MCU；The swept resistance of stepless time adjustment switch is also connected with MCU, and swept resistance is adopted
Collect the voltage of electric motor, and be sent to MCU, the metal-oxide-semiconductor is connected on the cathode supply lines of battery pack, MCU connection control
The duty ratio of metal-oxide-semiconductor.
Preferably, the sampling resistor of acquisition electric current is also in series on the cathode supply lines of the battery pack, sampling resistor connects
Connected operational amplifier connection MCU.
Preferably, it is also in series with pressure switch on the positive supply lines of the electric motor, the pressure switch is by electronic
The water spray of sprayer controls cutting.
Preferably, the stepless time adjustment switch, the change in resistance by adjusting swept resistance change the output electricity of battery pack
Size is pressed, thus the revolving speed of control and adjusting electric motor.
Preferably, the stepless time adjustment closes the switch, and the anode of battery pack is powered by LDO to MCU, and MCU passes through control
When real-time detection motor voltage value adjusts duty ratio to reach the motor constant pressure purpose for having feedback to the switch duty of metal-oxide-semiconductor.
Preferably, when the constant pressure of electric motor value is lower, fountain head is closed, motor lock-rotor and revolving speed is not enough to cut off pressure
Power switch, so that motor can be burnt out；Electric motor running current value is acquired by sampling resistor, to determine whether electric motor is sent out
If it happens raw stall then tunes up MOS switch duty ratio, so that cut-out pressure switchs.
Preferably, the judgment threshold of the locked rotor current of the electric motor, the perseverance according to battery voltage and electric motor
The section of pressure value is respectively set, and when the running current of electric motor is greater than threshold value, is judged as stall.
The utility model has the advantages that:
The stepless speed regulation circuit of power spraye provided by the utility model, MCU is by controlling the switch duty of MOS when
Real-time detection motor both ends limited voltages value adjusts duty ratio to reach the motor constant pressure purpose for having feedback, can be realized electronic
The step-less adjustment of sprayer；It determines whether motor occurs stall by judging motor operation current value, if it happens, then tunes up
MOS switch duty ratio realizes the auxiliary protection of motor lock-rotor so that cut-out pressure switchs.
Detailed description of the invention
The utility model is further described with reference to the accompanying drawings and embodiments:
Fig. 1 is the schematic diagram of the stepless speed regulation circuit of power spraye described in the utility model.
Specific embodiment
As shown in Figure 1, the schematic diagram of the stepless speed regulation circuit for power spraye described in the utility model, the electronic spray
The electric motor M1 of day with fog connects power supply by the positive and negative electrode of battery pack, and the stepless speed regulation circuit includes stepless time adjustment switch
The control panel that Ssp and LDO, MCU, metal-oxide-semiconductor, operational amplifier and sampling resistor RES are formed.
The stepless time adjustment switch Ssp adjusts the operating voltage of electric motor, stepless time adjustment switch two by swept resistance
End is separately connected the anode and LDO input terminal of electric motor, and LDO output end provides 3.3V-5V operating voltage to MCU；Electrodeless tune
The swept resistance of speed switch is also connected with MCU, and swept resistance acquires the voltage of electric motor, and is sent to MCU, the metal-oxide-semiconductor string
It is associated on the cathode supply lines of battery pack.
The stepless time adjustment closes the switch, and the anode of battery pack is powered by LDO to MCU, and control panel enters working condition.
Stepless time adjustment switch, the change in resistance by adjusting swept resistance changes the output voltage size of battery pack, thus control and tune
Swept resistance resistance value 40K~90K of the revolving speed of section electric motor, stepless time adjustment switch corresponds to constant pressure value 6.5V~present battery packet
Voltage.Swept resistance acquires the voltage of electric motor, and is sent to MCU, and MCU is when real by the switch duty of control metal-oxide-semiconductor
When detect motor voltage value and adjust duty ratio to reach the motor constant pressure purpose for having feedback.
The sampling resistor RES of acquisition electric current is also in series on the cathode supply lines of the battery pack, sampling resistor connection is logical
Cross operational amplifier connection MCU.Pressure switch Spr is also in series on the positive supply lines of the electric motor, the pressure is opened
It closes Spr and cutting is controlled by the water spray of power spraye.
When the constant pressure of electric motor value is lower, fountain head is closed, and motor lock-rotor and revolving speed are not enough to cut-out pressure switch,
To which motor can be burnt out.Therefore, electric motor running current value is acquired by sampling resistor, to determine whether electric motor occurs
If it happens stall then tunes up MOS switch duty ratio, so that cut-out pressure switchs.
Since the locked rotor current of motor is related with battery voltage and motor constant pressure value, so the locked rotor current of electric motor
Judgment threshold, the section of the constant pressure value according to battery voltage and electric motor is respectively set, when the operation electricity of electric motor
When stream is greater than threshold value, it is judged as stall.Table 1 is locked rotor current threshold value table.
1 locked rotor current threshold value table of table
Due to motor constant pressure value 12V or more can normal cutoff pressure switch, do not need stall auxiliary protection.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
People can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.It is all
According to the modification that the Spirit Essence of the utility model main technical schemes is done, should all cover in the protection scope of the utility model
Within.
Claims (3)
1. the electric motor of the stepless speed regulation circuit of power spraye, the power spraye is connected by the positive and negative electrode of battery pack
Power supply, it is characterised in that: the stepless speed regulation circuit includes stepless time adjustment switch, LDO, MCU and metal-oxide-semiconductor；The stepless time adjustment
Switch adjusts the operating voltage of electric motor by swept resistance, and stepless time adjustment switch ends are separately connected the anode of electric motor
With LDO input terminal, LDO output end provides operating voltage to MCU；The swept resistance of stepless time adjustment switch is also connected with MCU, sliding electricity
The voltage of resistance acquisition electric motor, and it is sent to MCU, the metal-oxide-semiconductor is connected on the cathode supply lines of battery pack, MCU connection
Control the duty ratio of metal-oxide-semiconductor.
2. the stepless speed regulation circuit of power spraye according to claim 1, it is characterised in that: the cathode of the battery pack
The sampling resistor of acquisition electric current is also in series on supply lines, sampling resistor connection connects MCU by operational amplifier.
3. the stepless speed regulation circuit of power spraye according to claim 2, it is characterised in that: the electric motor is just
Pressure switch is also in series on the supply lines of pole, the pressure switch controls cutting by the water spray of power spraye.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821644828.0U CN208754211U (en) | 2018-10-11 | 2018-10-11 | The stepless speed regulation circuit of power spraye |
| US16/421,438 US20200119671A1 (en) | 2018-10-11 | 2019-05-23 | Stepless speed control circuit of electric sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821644828.0U CN208754211U (en) | 2018-10-11 | 2018-10-11 | The stepless speed regulation circuit of power spraye |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208754211U true CN208754211U (en) | 2019-04-16 |
Family
ID=66085648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821644828.0U Expired - Fee Related CN208754211U (en) | 2018-10-11 | 2018-10-11 | The stepless speed regulation circuit of power spraye |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208754211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088568A (en) * | 2018-10-11 | 2018-12-25 | 苏州萨得尔电动工具有限公司 | The stepless speed regulation circuit of power spraye |
-
2018
- 2018-10-11 CN CN201821644828.0U patent/CN208754211U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088568A (en) * | 2018-10-11 | 2018-12-25 | 苏州萨得尔电动工具有限公司 | The stepless speed regulation circuit of power spraye |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190416 Termination date: 20211011 |