CN209823668U - Hall-free sampling device for DC brushless motor of underwater propeller - Google Patents
Hall-free sampling device for DC brushless motor of underwater propeller Download PDFInfo
- Publication number
- CN209823668U CN209823668U CN201920915182.3U CN201920915182U CN209823668U CN 209823668 U CN209823668 U CN 209823668U CN 201920915182 U CN201920915182 U CN 201920915182U CN 209823668 U CN209823668 U CN 209823668U
- Authority
- CN
- China
- Prior art keywords
- acquisition circuit
- resistor
- brushless motor
- operational amplifier
- circuit unit
- 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.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model discloses a no hall sampling device for underwater propulsor DC brushless motor, including three-phase voltage acquisition circuit, three-phase current acquisition circuit, three-phase voltage acquisition circuit, including A looks voltage acquisition circuit unit, B looks voltage acquisition circuit unit, C looks voltage acquisition circuit unit, each looks voltage acquisition circuit unit all includes resistance R1, the external DC brushless motor of one end of resistance R1 corresponds looks supply terminal, resistance R1's the other end is connected with ground through resistance R2, resistance R2's both ends are parallelly connected there is electric capacity C1, resistance R1, resistance R2's contact department is the signal output part of this looks voltage acquisition circuit unit. The utility model discloses electric current is simple, realizes easily, and the low power dissipation, and this no hall sampling device passes through controller and realizes underwater propulsor brushless DC motor's closed-loop control, has good application prospect.
Description
Technical Field
The utility model relates to an electronic circuit technical field, concretely relates to no hall sampling device for underwater propulsor DC brushless motor.
Background
At present, the underwater propeller in the market has small power and more wire harnesses, and the underwater propeller is driven by a direct-current brushless motor. The operation condition of the direct current brushless motor is subjected to data acquisition through the Hall sensor. However, the underwater environment is severe, and the wiring harness is easy to influence the sealing degree in the multi-wiring process, so that the hall sensor is easy to damage, the wiring harness is reduced, the assembly is convenient, the operation condition data acquisition of the direct current brushless motor is carried out by adopting a hall-sensor-free mode, and how to realize the operation condition data acquisition is the problem which needs to be solved currently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming current operating conditions to DC brushless motor and carrying out data acquisition through hall sensor, the pencil is walked the line in-process more and is influenced sealed degree easily, leads to the easy problem of damaging of hall sensor. The utility model discloses a no hall sampling device for underwater propulsor DC brushless motor need not hall sensor, and the wiring is few, convenient equipment, this no three-phase voltage acquisition circuit, three-phase current acquisition circuit of hall mode, and electric current is simple, realizes easily, and low power dissipation, and this no hall sampling device passes through the controller and realizes underwater propulsor DC brushless motor's closed-loop control, has good application prospect.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a Hall-free sampling device for a DC brushless motor of an underwater propeller comprises a three-phase voltage acquisition circuit and a three-phase current acquisition circuit,
the three-phase voltage acquisition circuit comprises an A-phase voltage acquisition circuit unit, a B-phase voltage acquisition circuit unit and a C-phase voltage acquisition circuit unit, wherein each phase voltage acquisition circuit unit comprises a resistor R1, one end of a resistor R1 is externally connected with a power supply terminal of a corresponding phase of the DC brushless motor, the other end of the resistor R1 is connected with the ground through a resistor R2, two ends of the resistor R2 are connected with a capacitor C1 in parallel, and the contact position of the resistor R1 and the resistor R2 is a signal output end of the phase voltage acquisition circuit unit;
the three-phase current acquisition circuit comprises an A-phase current acquisition circuit unit, a B-phase current acquisition circuit unit and a C-phase current acquisition circuit unit, wherein each phase current acquisition circuit unit comprises an operational amplifier U1, the positive input end of the operational amplifier U1 is connected with the power supply terminal of the corresponding phase of the DC brushless motor through a resistor R3 and a resistor R4 in sequence, the reverse input end of the operational amplifier U1 is connected with the driving MOS tube of the DC brushless motor through a resistor R5,
the positive input end of the operational amplifier U1 is further connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the reverse input end of the operational amplifier U1, the positive electrode of the diode D1 is further connected with the ground through a resistor R6, the positive input end of the operational amplifier U1 is connected with a VCC voltage terminal through a resistor R7, the output end of the operational amplifier U1 is further connected with the reverse input end of the operational amplifier U1 through a resistor R8, and the output end of the operational amplifier U1 is the signal output end of the phase current acquisition circuit unit.
In the hall-free sampling device for the underwater propeller brushless direct current motor, the VCC voltage terminal is further connected with the positive electrode of the polar capacitor C2, the negative electrode of the polar capacitor C2 is connected with the ground, and the two ends of the polar capacitor C2 are connected in parallel to form the capacitor C3.
In the hall-free sampling device for the underwater propeller brushless dc motor, the operational amplifier U1 is a single operational amplifier, and the model is an OPA254 single operational amplifier chip.
In the hall-free sampling device for the brushless dc motor of the underwater propeller, the resistance value of the resistor R1 is 30K Ω; the resistance value of the resistor R2 is 2K omega.
According to the Hall-free sampling device for the underwater propeller brushless direct current motor, the VCC voltage terminal provides 5V voltage.
In the hall-free sampling device for the underwater propeller direct current brushless motor, the phase signal output ends of the three-phase voltage acquisition circuit and the three-phase current acquisition circuit are respectively connected with the signal input end of the underwater propeller direct current brushless motor controller.
The utility model has the advantages that: the utility model discloses a no hall sampling device for underwater propulsor DC brushless motor need not hall sensor, and the wiring is few, convenient equipment, this no three-phase voltage acquisition circuit, three-phase current acquisition circuit of hall mode, and electric current is simple, realizes easily, and low power dissipation, and this no hall sampling device passes through the controller and realizes underwater propulsor DC brushless motor's closed-loop control, has good application prospect.
Drawings
Fig. 1 is a circuit diagram of the single-phase voltage acquisition circuit unit and the single-phase current acquisition circuit unit of the hall-free sampling device for the underwater propeller brushless dc motor of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The Hall-free sampling device for the DC brushless motor of the underwater propeller comprises a three-phase voltage acquisition circuit and a three-phase current acquisition circuit,
the three-phase voltage acquisition circuit comprises an A-phase voltage acquisition circuit unit, a B-phase voltage acquisition circuit unit and a C-phase voltage acquisition circuit unit, and can be expanded into a three-phase voltage acquisition circuit and a three-phase current acquisition circuit as shown in fig. 1, wherein each phase voltage acquisition circuit unit comprises a resistor R1, one end of the resistor R1 is externally connected with a power supply terminal of a corresponding phase of the direct current brushless motor, the other end of the resistor R1 is connected with the ground through a resistor R2, two ends of the resistor R2 are connected with a capacitor C1 in parallel, and the contact position of the resistor R1 and the resistor R2 is a signal output end of the phase voltage acquisition circuit unit;
the three-phase current acquisition circuit comprises an A-phase current acquisition circuit unit, a B-phase current acquisition circuit unit and a C-phase current acquisition circuit unit, wherein each phase current acquisition circuit unit comprises an operational amplifier U1, the positive input end of the operational amplifier U1 is connected with the power supply terminal of the corresponding phase of the DC brushless motor through a resistor R3 and a resistor R4 in sequence, the reverse input end of the operational amplifier U1 is connected with the driving MOS tube of the DC brushless motor through a resistor R5,
the positive input end of the operational amplifier U1 is further connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the reverse input end of the operational amplifier U1, the positive electrode of the diode D1 is further connected with the ground through a resistor R6, the positive input end of the operational amplifier U1 is connected with a VCC voltage terminal through a resistor R7, the output end of the operational amplifier U1 is further connected with the reverse input end of the operational amplifier U1 through a resistor R8, and the output end of the operational amplifier U1 is the signal output end of the phase current acquisition circuit unit.
Preferably, the VCC voltage terminal is further connected to the positive electrode of a polar capacitor C2, the negative electrode of the polar capacitor C2 is connected to ground, two ends of the polar capacitor C2 are connected in parallel to form a capacitor C3, the VCC voltage terminal provides 5V voltage, and the power supply quality of the 5V voltage can be improved through filtering of the capacitors C2 and C3.
Preferably, the operational amplifier U1 is a single operational amplifier, and the model is an OPA254 single operational amplifier chip, and the OPA254 chip has low power consumption and low cost, and can input a differential signal to improve the accuracy of the test current.
Preferably, the resistance value of the resistor R1 is 30K Ω; the resistance value of the resistor R2 is 2K omega, and the resistor R1 and the resistor R2 in the proportion are convenient for converting a high-voltage signal of a phase line of the direct-current brushless motor into a low-voltage signal which can be sampled by a direct-current brushless motor controller of the water-supply push-down device in a resistor voltage division mode, so that the voltage value of each phase can be obtained conveniently.
And the signal output ends of the three-phase voltage acquisition circuit and the three-phase current acquisition circuit are respectively connected with the signal input end of the underwater propeller direct current brushless motor controller.
The utility model discloses a no hall sampling device for underwater propulsor DC brushless motor, the theory of operation as follows: when the direct current brushless motor drives the MOS tube to be conducted, the voltage drop between the positive input end and the negative input end of the operational amplifier U1 is the conduction voltage drop of the MOS tube, and current flows through the MOS tube, and after the differential signal is amplified by the operational amplifier U1 through a differential amplification circuit formed by a resistor R3, a resistor R4, a diode D1 and a resistor R5, the current signal is converted into a voltage signal to be measured; through the mode of resistance R1, resistance R2 partial pressure, convert the high voltage signal of DC brushless motor phase line into the low pressure signal that can supply the sampling of lower propeller DC brushless motor controller, be convenient for obtain the voltage value of each phase to need not hall sensor, can measure the brushless motor behavior of flow, this no hall sampling device passes through the closed-loop control that the controller realized underwater propeller DC brushless motor.
To sum up, the utility model discloses a no hall sampling device for underwater propulsor DC brushless motor need not hall sensor, and the wiring is few, convenient equipment, this no hall mode's three-phase voltage acquisition circuit, three-phase current acquisition circuit, and the electric current is simple, realizes easily, and low power dissipation, and this no hall sampling device passes through the closed-loop control that the controller realized underwater propulsor DC brushless motor, has good application prospect.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a no hall sampling device for underwater propulsor DC brushless motor which characterized in that: comprises a three-phase voltage acquisition circuit and a three-phase current acquisition circuit,
the three-phase voltage acquisition circuit comprises an A-phase voltage acquisition circuit unit, a B-phase voltage acquisition circuit unit and a C-phase voltage acquisition circuit unit, wherein each phase voltage acquisition circuit unit comprises a resistor R1, one end of a resistor R1 is externally connected with a power supply terminal of a corresponding phase of the DC brushless motor, the other end of the resistor R1 is connected with the ground through a resistor R2, two ends of the resistor R2 are connected with a capacitor C1 in parallel, and the contact position of the resistor R1 and the resistor R2 is a signal output end of the phase voltage acquisition circuit unit;
the three-phase current acquisition circuit comprises an A-phase current acquisition circuit unit, a B-phase current acquisition circuit unit and a C-phase current acquisition circuit unit, wherein each phase current acquisition circuit unit comprises an operational amplifier U1, the positive input end of the operational amplifier U1 is connected with the power supply terminal of the corresponding phase of the DC brushless motor through a resistor R3 and a resistor R4 in sequence, the reverse input end of the operational amplifier U1 is connected with the driving MOS tube of the DC brushless motor through a resistor R5,
the positive input end of the operational amplifier U1 is further connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the reverse input end of the operational amplifier U1, the positive electrode of the diode D1 is further connected with the ground through a resistor R6, the positive input end of the operational amplifier U1 is connected with a VCC voltage terminal through a resistor R7, the output end of the operational amplifier U1 is further connected with the reverse input end of the operational amplifier U1 through a resistor R8, and the output end of the operational amplifier U1 is the signal output end of the phase current acquisition circuit unit.
2. The Hall-free sampling device for the DC brushless motor of the underwater propeller of claim 1, wherein: the VCC voltage terminal is also connected with the anode of a polar capacitor C2, the cathode of the polar capacitor C2 is connected with the ground, and two ends of the polar capacitor C2 are connected in parallel to form a capacitor C3.
3. The Hall-free sampling device for the DC brushless motor of the underwater propeller of claim 1, wherein: the operational amplifier U1 is a single operational amplifier and is an OPA254 single operational amplifier chip.
4. The Hall-free sampling device for the DC brushless motor of the underwater propeller of claim 1, wherein: the resistance value of the resistor R1 is 30K omega; the resistance value of the resistor R2 is 2K omega.
5. The Hall-free sampling device for the DC brushless motor of the underwater propeller of claim 1, wherein: the VCC voltage terminal provides a 5V voltage.
6. The Hall-free sampling device for the DC brushless motor of the underwater propeller of claim 1, wherein: and the signal output ends of the three-phase voltage acquisition circuit and the three-phase current acquisition circuit are respectively connected with the signal input end of the underwater propeller direct current brushless motor controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915182.3U CN209823668U (en) | 2019-06-18 | 2019-06-18 | Hall-free sampling device for DC brushless motor of underwater propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915182.3U CN209823668U (en) | 2019-06-18 | 2019-06-18 | Hall-free sampling device for DC brushless motor of underwater propeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209823668U true CN209823668U (en) | 2019-12-20 |
Family
ID=68884568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920915182.3U Active CN209823668U (en) | 2019-06-18 | 2019-06-18 | Hall-free sampling device for DC brushless motor of underwater propeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209823668U (en) |
-
2019
- 2019-06-18 CN CN201920915182.3U patent/CN209823668U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212220367U (en) | Controller circuit of electric power steering system | |
| CN201234142Y (en) | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter | |
| CN209823668U (en) | Hall-free sampling device for DC brushless motor of underwater propeller | |
| CN212008876U (en) | Circuit for monitoring working state of switching power supply | |
| CN208723823U (en) | The protection circuit of driving circuit | |
| CN207150418U (en) | Current foldback circuit and motor driver | |
| CN208272880U (en) | Electric machine controller circuit | |
| CN111175564A (en) | Three-phase current detection circuit of brushless direct current motor driver | |
| CN210578322U (en) | Three-phase current driving circuit and three-phase current acquisition circuit of direct-current brushless motor | |
| CN203522150U (en) | Protection circuit used for brushless DC motor and brushless DC motor | |
| CN207195262U (en) | A kind of cell management system of electric automobile fan drive circuit | |
| CN105337534A (en) | Power consumption and temperature monitoring circuit for brushless direct current motor of anaesthesia machine | |
| CN110346015A (en) | Electric pole type water logging detection circuit and water sensor | |
| CN217085090U (en) | Positive and negative voltage sampling circuit | |
| CN216209736U (en) | Current monitor for storage battery of photovoltaic system | |
| CN216524231U (en) | Liquid level detection circuit | |
| CN216387274U (en) | Voltage and current sampling circuit in alternating current-direct current voltage withstand test | |
| CN214045483U (en) | Constant speed control circuit of direct current brush motor | |
| CN219122294U (en) | Conversion circuit | |
| CN209676207U (en) | A kind of magnetic induction electronic bistable switch | |
| CN106129959A (en) | A kind of power circuit and power circuit protection circuit thereof | |
| CN219204368U (en) | Power supply circuit for fan | |
| CN209250229U (en) | 380VAC protects circuit and charger | |
| CN219513983U (en) | Control circuit, motor driving plate and driving device of sensorless brushless three-phase motor | |
| CN102858065B (en) | Universal direct-current LED driving power source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210330 Address after: 213000 No.9, Xinyong Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: CHANGZHOU TAOCHEN ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 213000 Business Center B-601, Changzhou Science and Education City, No. 18 Changwu Middle Road, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU TAOTAO INTELLIGENT TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |