CN208872851U - Brush direct current motor commutation detection circuit - Google Patents
Brush direct current motor commutation detection circuit Download PDFInfo
- Publication number
- CN208872851U CN208872851U CN201821143912.4U CN201821143912U CN208872851U CN 208872851 U CN208872851 U CN 208872851U CN 201821143912 U CN201821143912 U CN 201821143912U CN 208872851 U CN208872851 U CN 208872851U
- Authority
- CN
- China
- Prior art keywords
- unit
- signal
- resistance
- filter
- comparator
- 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 Direct Current Motors (AREA)
Abstract
The utility model relates to a kind of brush direct current motor commutation detection circuits, including signal acquisition unit, signal separation unit, signal amplification unit, filter unit, comparator unit and MCU unit；The signal acquisition unit is connected with signal separation unit；Signal separation unit is connected with signal amplification unit；Signal amplification unit is connected with filter unit；Filter unit is connected with comparator unit；Comparator unit is connected with MCU unit.The utility model has the advantages that structure is simple, overall cost is lower, detection is more accurate compared to the product using Hall；Compared to the application that reverse electromotive force calculates, the utility model is not influenced by the parameter of electric machine and payload size, is had more preferably reliability and precision, is particularly suitable for application of the linear motor in positioning.
Description
Technical field
The utility model relates to motor control technology field, especially a kind of brush direct current motor commutation detection circuit.
Background technique
Starting is fast, brakes the performance characteristics such as timely, control circuit is relatively easy since its own has for brush direct current motor,
Therefore it is widely used in all trades and professions；The brush control that has on the market is all using opened loop control at present, and speed can not
It is detected；And for some product requirement constant speed controls, must be requested that detect revolving speed, all use and pacify inside motor
The mode of dress Hall is detected, but the higher cost of this detection mode, complex process, and its reliability is not high, is unfavorable for
It is promoted in the market.
Utility model content
Technical problem to be solved by the utility model is: providing a kind of brush direct current motor commutation detection circuit, have at
The features such as this is low, precision is high, highly reliable.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of brush direct current motor commutation detection electricity
Road, including signal acquisition unit, signal separation unit, signal amplification unit, filter unit, comparator unit and MCU unit；
The signal acquisition unit is connected with signal separation unit；Signal separation unit is connected with signal amplification unit；Signal
Amplifying unit is connected with filter unit；Filter unit is connected with comparator unit；Comparator unit is connected with MCU unit
It connects.
Further, the utility model include current acquisition resistance, capacitance, bleeder resistance, operation amplifier unit,
Amplification configuration resistance, RC filter resistance, RC filter capacitor, comparator unit and bias pressure resistance；The current acquisition
Resistance connects operation amplifier unit with bleeder resistance by capacitance；Operation amplifier unit connection amplification configuration resistance simultaneously will letter
Comparator unit is connected by RC filter resistance and RC filter capacitor after number amplification；The comparator unit connection partial pressure is inclined
Set resistance and by input signal compared with bias voltage after export square-wave pulse signal.
It further says, the electric motor loop electric current that the utility model flows through current acquisition resistance terminal is formed at resistance both ends
Pressure drop.
It further says, the utility model inputs to the signal of operation amplifier unit after capacitance as motor fortune
The AC compounent of row electric current.
The utility model has the beneficial effects that solving defect present in background technique, compared to the production using Hall
Product, the utility model have the advantages that structure is simple, overall cost is lower, detection is more accurate；Compared to reverse electromotive force meter
The application of calculation, the utility model are not influenced by the parameter of electric machine and payload size, have more preferably reliability and precision, especially
Suitable for application of the linear motor in positioning.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model；
Fig. 3 (a)-(e) is the waveform diagram of each test point in Fig. 2.
Specific embodiment
The utility model is described in further detail presently in connection with attached drawing and preferred embodiment.These attached drawings are letter
The schematic diagram of change, only illustrates the basic structure of the utility model in a schematic way, thus its only show it is related with the utility model
Composition.
A kind of brush direct current motor commutation detection circuit as shown in Figure 1, utilizes brushed DC motor commutation Shi Qi electricity
Stream can mutate this feature and to realize the phase-detection of motor, including signal acquisition unit, signal separation unit, signal
Amplifying unit, filter unit, comparator unit and MCU unit；Signal acquisition unit is connected with signal separation unit；Signal
Separative unit is connected with signal amplification unit；Signal amplification unit is connected with filter unit；Filter unit and comparator list
Member is connected；Comparator unit is connected with MCU unit, and signal acquisition unit is used to acquire the running current of motor, mainly adopts
Collect the voltage analog at the inspection leakage resistance both ends of electric motor loop；Signal separation unit is by the direct current in collected voltage analog
Its AC compounent is extracted in component isolation, and signal amplification unit amplifies above-mentioned AC compounent, and filter unit is by the high frequency in signal
Filtered AC compounent is organized into square-wave pulse signal by noise filtering, comparator unit, and MCU is tired out in real time by input port
Product square-wave pulse signal carries out count operation to pulse signal, and the umber of pulse of generation per second is electricity divided by commutator segment quantity
The current rotating speed of machine, while by the operation of MCU, the row of driver is obtained by conversion in fixed direct current Linear actuator
The positioning of linear motor elaborate position may be implemented in journey distance.
Particular circuit configurations are as shown in Fig. 2, include current acquisition resistance R1, capacitance C1, bleeder resistance R2, amplifier list
Member, amplification configuration resistance R3, amplification configuration resistance R4, RC filter resistance R5, RC filter capacitor C2, comparator unit, partial pressure are inclined
Set resistance R6, bias pressure resistance R7；
Wherein, one end ground connection of current acquisition resistance R1, the other end connect capacitance C1；Capacitance C1 and vent discharge
Resistance R2 is connected to the noninverting input of operation amplifier unit；The reverse input end connection of operation amplifier unit is separately connected amplification and matches
Set one end of resistance R3 and one end of amplification configuration resistance R4；The other end connection operation amplifier unit of amplification configuration resistance R3
Output end, the other end ground connection of amplification configuration resistance R4；The output end of one end connection operation amplifier unit of RC filter resistance R5,
The one end filter capacitor C2 RC ground connection, the other end connect RC filter resistance R5；The other end of RC filter resistance R5 connects comparator list
The noninverting input of member；The reverse input end of comparator unit connects bias pressure resistance R6 and bias pressure resistance R7；Compare
The output end of device unit connects MCU.
The working principle of circuit is as follows: the electric motor loop electric current for flowing through the end current acquisition resistance R1 is formed at resistance both ends presses
Drop, the signal that DC component is filtered out after capacitance C1 input to operation amplifier unit, and operation amplifier unit puts signal
Comparator unit is inputed to after RC filters out high frequency noise after big, comparator unit is by signal compared with bias voltage
Compared with waveform being organized into square-wave pulse signal, which inputs to MCU, and MCU is acquired counting fortune to the pulse signal
It can be concluded that the revolving speed of motor, then may determine that linear motor the travel position of motor after calculation.
TP1-TP5 is respectively 5 test points in Fig. 2, shown in corresponding waveform such as Fig. 3 (a)-(e) of each test point；Its
In, Fig. 3 (a) is the waveform diagram for acquiring signal；Fig. 3 (b) is the waveform diagram of signal after separation；Fig. 3 (c) is after filtering
The waveform diagram of signal；Fig. 3 (d) is the waveform diagram of amplified signal；Fig. 3 (e) is the waveform for comparing afterpulse signal
Schematic diagram.
It is specific embodiment of the present utility model described in above instructions, various illustrations are not practical to this
Novel substantive content is construed as limiting, and person of an ordinary skill in the technical field can be to former institute after having read specification
The specific embodiment stated is made an amendment or is deformed, without departing from the spirit and scope of utility model.
Claims (4)
- The detection circuit 1. a kind of brush direct current motor commutates, it is characterised in that: including signal acquisition unit, signal separation unit, Signal amplification unit, filter unit, comparator unit and MCU unit；The signal acquisition unit and signal separation unit It is connected；Signal separation unit is connected with signal amplification unit；Signal amplification unit is connected with filter unit；Filter unit It is connected with comparator unit；Comparator unit is connected with MCU unit.
- The detection circuit 2. brush direct current motor as described in claim 1 commutates, it is characterised in that: including current acquisition resistance, Capacitance, bleeder resistance, operation amplifier unit, amplification configuration resistance, RC filter resistance, RC filter capacitor, comparator unit And bias pressure resistance；The current acquisition resistance connects operation amplifier unit with bleeder resistance by capacitance；Fortune It calculates amplifying unit connection amplification configuration resistance and is compared after amplifying signal by RC filter resistance and the connection of RC filter capacitor Device unit；The described comparator unit connection bias pressure resistance and by input signal compared with bias voltage after export square wave Pulse signal.
- The detection circuit 3. brush direct current motor as claimed in claim 2 commutates, it is characterised in that: flow through current acquisition resistance terminal Electric motor loop electric current resistance both ends formed pressure drop.
- The detection circuit 4. brush direct current motor as claimed in claim 2 commutates, it is characterised in that: inputted after capacitance Signal to operation amplifier unit is the AC compounent of motor operating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821143912.4U CN208872851U (en) | 2018-07-19 | 2018-07-19 | Brush direct current motor commutation detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821143912.4U CN208872851U (en) | 2018-07-19 | 2018-07-19 | Brush direct current motor commutation detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208872851U true CN208872851U (en) | 2019-05-17 |
Family
ID=66463056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821143912.4U Active CN208872851U (en) | 2018-07-19 | 2018-07-19 | Brush direct current motor commutation detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208872851U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964560A (en) * | 2018-07-19 | 2018-12-07 | 常州市凯迪电器股份有限公司 | Brush direct current motor rotational speed extraction method and its circuit |
-
2018
- 2018-07-19 CN CN201821143912.4U patent/CN208872851U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964560A (en) * | 2018-07-19 | 2018-12-07 | 常州市凯迪电器股份有限公司 | Brush direct current motor rotational speed extraction method and its circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108964560A (en) | Brush direct current motor rotational speed extraction method and its circuit | |
| CN105675906A (en) | Direct current brushed motor speed measurement device and speed measurement method | |
| AU2010364174B2 (en) | Electromagnetic flow meter | |
| CN103142225A (en) | Electroencephalograph for determining contact status between electrode and scalp and method for determining same | |
| CN107218984B (en) | Online diagnosis system and method for natural gas turbine flowmeter | |
| CN208872851U (en) | Brush direct current motor commutation detection circuit | |
| CN204882460U (en) | Impulse eddy current testing system based on multilayer combination formula exciting coil | |
| CN105974256B (en) | Sine and cosine encoder wire break detection method | |
| CN103134943B (en) | High-voltage Hall type rotating speed sensor | |
| CN106877757A (en) | DC motor speed-regulating control system and its speed detection method | |
| CN107449932A (en) | A kind of measuring method of aeroengine rotor rotating speed | |
| US20240159730A1 (en) | A signal processing system and method for inductive oil abrasive particle sensor | |
| CN205506857U (en) | DC BRUSH MOTOR speed sensor | |
| CN109581043A (en) | A kind of high direct voltage signal acquisition circuit | |
| CN203275432U (en) | Automobile engine speed measurement device | |
| CN203772944U (en) | True effective value AC/DC voltage measuring device capable of automatically identifying type of signal | |
| CN208383293U (en) | A kind of noise high precision measuring device of high rotation speed servo motor | |
| CN203933599U (en) | A kind of electric machine controller pulses switch device | |
| CN108955865A (en) | A kind of novel vibrating frequency sensor system based on switched capacitor technique | |
| CN206725726U (en) | A kind of voltage check device of large-size machine | |
| CN203084002U (en) | High-voltage hall type rotation speed sensor | |
| CN209590112U (en) | A kind of small signal deteching circuit removing dead zone voltage | |
| CN207601102U (en) | A kind of DC motor speed measuring device | |
| CN206081921U (en) | Permanent wind volume clearing machine | |
| CN103344811B (en) | A kind of DC motor current detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |