CN208226830U - A kind of motor hall sensor signal detection circuit - Google Patents
A kind of motor hall sensor signal detection circuit Download PDFInfo
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- CN208226830U CN208226830U CN201820899497.9U CN201820899497U CN208226830U CN 208226830 U CN208226830 U CN 208226830U CN 201820899497 U CN201820899497 U CN 201820899497U CN 208226830 U CN208226830 U CN 208226830U
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Abstract
The utility model belongs to brshless DC motor technical field, and in particular to a kind of motor hall sensor signal detection circuit.Three road HALL signal detections are relied on to the demanding technical problem of microprocessor to solve existing brushless motor detection, the utility model provides a kind of motor hall sensor signal detection circuit, including for being filtered to the motor hall signal of input filter circuit, for No. three motor hall signals of input to be synthesized frequency tripling signal all the way with calculate the signal synthesis circuit of motor speed and be used to judge rotor-position and rotor direction of rotation signal bleeder circuit.The utility model circuit structure is simple, low in cost, high reliablity, high resolution, dynamic response are good, can be used for the detection of revolving speed and rotor-position to brshless DC motor, steering, to realize the stabilization to motor, be precisely controlled.
Description
Technical field
The utility model belongs to brshless DC motor technical field, and in particular to a kind of motor hall sensor signal detection electricity
Road.
Background technique
Brshless DC motor can regard the direct current generator for replacing mechanical commutation with electronic commutating device as, brushless straight
Galvanic electricity owner will be made of permanent magnet motor ontology, rotor-position sensor and electronic commutation circuit.
Universal, brshless DC motor uses three Hall (HALL) elements as rotor-position sensor, to detect
The position of rotor differs 120 degree on motor stator and is symmetrically installed, can be by rotor-position within the scope of 0~360 degree of the electric period
It is divided into 6 sectors, every 60 degree of sectors.
In rotor rotation process, three HALL elements are successively passed through in the magnetic field that the magnet on rotor is formed, due to
The effect of HALL effect generates the square wave hall signal of three 120 degree of tunnel phase mutual deviations, square wave signal reaction rotor
Location information.
When brshless DC motor uses sine wave drive mode, the accurate position signal of rotor and speed signal are needed.
Position signal is to realize that Field orientable control, speed signal are then used as the feedback signal of velocity close-loop control, and in sector
Estimate rotor-position.
Universal, in modern the control system for non-brush direct currunt electromotors, three road HALL signal of motor is sent after modulate circuit
Enter capture (CAP) pin of microprocessor (MCU or DSP), detection, can per the time between two hopping edges of HALL signal all the way
Calculate the revolving speed of motor.Meanwhile by the state of three road HALL signals, it can be determined that the location of rotor.This HALL letter
Number detection mode requires microprocessor tool, and there are three capturing units, more demanding to the peripheral resources of microprocessor.
In the not high occasion of control precision and dynamic response requirement, capture pin is entered using HALL signal all the way, to
Detect the revolving speed of motor.But the real-time that its speed calculates is not as good as the scheme of three road signals of detection.
The scheme for detecting three road HALL signals requires microprocessor to have three road capturing units and three capture pins, has
Microprocessor does not have these resources, and selects the microprocessor higher cost for having these resources.
Utility model content
The demanding technology of microprocessor is asked in order to solve existing brushless motor detection three road HALL signal detections of dependence
Topic, the utility model provide a kind of motor hall sensor signal detection circuit, can be used to realize accurate position judgement and speed
Degree calculates, and microprocessor is only needed to have a capturing unit, a capture pin and three common digital I/O pins
Complete above-mentioned purpose.
The basic principle of the utility model is:
The basic scheme of the utility model is three road HALL square-wave signals by signal synthesis circuit, forms frequency tripling all the way
Signal.The frequency tripling signal connects a capture pin, calculates spinner velocity by capturing unit.Meanwhile three road HALL signal into
Enter three common digital I/O pins, to judge the direction of rotation of rotor-position and rotor.
The frequency tripling signal of synthesis captures pin into microprocessor.The signal rising edge or failing edge all catch triggering
It obtains unit and capturing events occurs, the time between two neighboring hopping edge can be calculated according to the timing data captured, into
And find out the average speed of rotor during this period of time.Within an electric period, six capturing events occur, six can be calculated
Velocity amplitude, as shown in Figure 1.Moment occurs for capturing events, reads three railway digital I/O signals, judges sector locating for rotor with this
Position, as shown in fig. 1, U, V, the value of W three-phase HALL signal indicate that sector, six sectors indicate respectively 101 with UVW,
100,110,010,011,001, only 1 HALL signal changes the position signal of adjacent sectors.The hopping edge of composite signal
Mean that sector locating for rotor switches.According to the sequence of sector switch, it can be determined that the direction of rotation of rotor.
Based on discussed above, the technical solution of the utility model is:
A kind of motor hall sensor signal detection circuit is characterized in that including for the motor Hall to input
The filter circuit that signal is filtered, No. three motor hall signals for that will input synthesize frequency tripling signal all the way, with into
The signal synthesis circuit that one step calculates motor speed, and the letter of the direction of rotation for judging rotor-position and rotor
Number bleeder circuit；Motor hall signal accesses signal synthesis circuit, synthesizes through signal synthesis circuit after filter circuit filters
Output later changes frequency tripling signal for the hopping edge that synchronization all the way only has a signal；It will be filtered through filter circuit
Signal access signal bleeder circuit will access signal partial pressure electricity through the filtered signal of filter circuit after XOR gate is handled
Road；The motor hall signal of input is U phase hall signal, V phase hall signal and W phase hall signal.
Further, the signal synthesis circuit include XOR gate U1B, XOR gate U1C, XOR gate U1D, XOR gate U2B,
XOR gate U2C and XOR gate U2D；Mono- leading-in end 4 of the XOR gate U1B connects U phase hall signal, another leading-in end 5 ground connection,
Output end 6 connects a leading-in end 4 of XOR gate U2B；Mono- leading-in end 9 of the XOR gate U1C connects V phase hall signal, another
Leading-in end 10 is grounded, and output end 8 connects another leading-in end 5 of XOR gate U2B；Mono- leading-in end 12 of the XOR gate U1D meets W
Phase hall signal, another leading-in end 13 ground connection, output end 11 connect a leading-in end 10 of XOR gate U2C；The XOR gate U2B
Output end 6 connects a leading-in end 12 of XOR gate U2D；Another leading-in end 9 of XOR gate U2C ground connection, output end 8 connect exclusive or
Another leading-in end 13 of door U2D；The XOR gate U2D output end 11 connects microprocessor, after signal synthesis circuit, three
Phase HALL signal is synthesized into frequency tripling signal all the way, and microprocessor passes through the motor that calculates that you can get it of the processing to the signal
Revolving speed.
Further, the signal filter circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2 and capacitor
C3；A termination U phase hall signal of the resistance R1, another termination capacitor C3 connect XOR gate U1B leading-in end 4 simultaneously；The electricity
A termination V phase hall signal of R2 is hindered, another termination capacitor C2 connects XOR gate U1C leading-in end 9 simultaneously；One end of the resistance R3
W phase hall signal is connect, another termination capacitor C1 connects XOR gate U1D leading-in end 12 simultaneously；The capacitor C1, capacitor C2, capacitor C3
The other end be grounded.
Further, the signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance
R9；The connection of the one end the resistance R4 through the filtered U phase hall signal of filter circuit, the other end connect one end of resistance R7 and
Microprocessor is connected to be used to U phase hall signal being sent into microprocessor；The one end the resistance R5 connects after filter circuit filters
V phase hall signal, one end of other end connection resistance R8 and connect microprocessor for V phase hall signal to be sent into micro- place
Manage device；The connection of the one end the resistance R6 connects one end of resistance R9 through the filtered W phase hall signal of filter circuit, the other end
And microprocessor is connected for W phase hall signal to be sent into microprocessor；The resistance R7, resistance R8, resistance R9 it is another
End is grounded；Microprocessor can carry out the position of rotor and direction of rotation according to the U phase, V phase, W phase hall signal received
Judgement.
Further, the signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance
R9；The hall signal that the signal bleeder circuit is taken is handled by U1B, U1C, U1D；The one end the resistance R4 connects XOR gate
The output end 6 of U1B, the other end connect one end of resistance R7 and connect microprocessor for U phase hall signal to be sent into micro- place
Manage device；The one end the resistance R5 connects the output end 8 of XOR gate U1C, and the other end connects one end of resistance R8 and connects micro- place
Device is managed to be used to V phase hall signal being sent into microprocessor；The one end the resistance R6 connects the output end 11 of XOR gate U1D, another
End connects one end of resistance R9 and connects microprocessor for W phase hall signal to be sent into microprocessor；The resistance R7, electricity
Hinder R8, the other end of resistance R9 is grounded；The circuit output has and low-impedance characteristic, and the signal anti-interference ability of output is more
By force；Microprocessor can judge the position of rotor and direction of rotation according to the U phase, V phase, W phase hall signal received.
Further, the XOR gate in the signal synthesis circuit chooses SN74HC86D XOR gate.
Further, the signal synthesis circuit is also possible that including operational amplifier U1A, operational amplifier U1B, fortune
Calculate amplifier U1C, operational amplifier U1D, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15 and ratio
Compared with device U2；The homophase input of the operational amplifier U1A terminates U phase hall signal, the homophase input termination of operational amplifier U1B
The homophase input of V phase hall signal, operational amplifier U1C terminates W phase hall signal, operational amplifier U1A, operational amplifier
U1B, operational amplifier U1C output end connect with itself inverting input terminal composition voltage follower；The operational amplifier
The non-inverting input terminal of operational amplifier U1D is accessed after the output terminating resistor R10 of U1A, the output of operational amplifier U1B terminates electricity
The non-inverting input terminal of operational amplifier U1D is accessed after resistance R11, accesses operation after the output terminating resistor R12 of operational amplifier U1C
The non-inverting input terminal of amplifier U1D；Connect after the output terminating resistor R14 of the operational amplifier U1D with itself inverting input terminal
It connects, is grounded after the inverting input terminal while connecting resistance R13 of operational amplifier U1D；The output end of the operational amplifier U1D accesses
The inverting input terminal of comparator U2 is connected to power supply VCC, the same phase of comparator U2 after the output terminating resistor R15 of comparator U2
Input terminal accesses 5V voltage；The output of the comparator U2 terminates microprocessor, after signal synthesis circuit, three-phase HALL letter
Number it is synthesized into frequency tripling signal all the way, the revolving speed that microprocessor passes through the motor that calculates that you can get it of the processing to the signal.
Further, the signal filter circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2 and capacitor
C3；A termination U phase hall signal of the resistance R1, another termination capacitor C3 connect the homophase input of operational amplifier U1A simultaneously
End；A termination V phase hall signal of the resistance R2, another termination capacitor C2 connect the homophase input of operational amplifier U1B simultaneously
End；A termination W phase hall signal of the resistance R3, another termination capacitor C3 connect the homophase input of operational amplifier U1C simultaneously
End；The capacitor C1, capacitor C2, capacitor C3 the other end be grounded.
Further, the signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance
R9；The connection of the one end the resistance R4 through the filtered U phase hall signal of filter circuit, the other end connect one end of resistance R7 and
Microprocessor is connected to be used to U phase hall signal being sent into microprocessor；The one end the resistance R5 connects after filter circuit filters
V phase hall signal, one end of other end connection resistance R8 and connect microprocessor for V phase hall signal to be sent into micro- place
Manage device；The connection of the one end the resistance R6 connects one end of resistance R9 simultaneously through the filtered W phase hall signal of filter circuit, the other end
And connection microprocessor is used to W phase hall signal being sent into microprocessor；The other end of the resistance R7, resistance R8, resistance R9
It is grounded；Microprocessor can sentence the position of rotor and direction of rotation according to the U phase, V phase, W phase hall signal received
It is disconnected.
Further, the signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance
R9；The hall signal that the signal bleeder circuit is taken passes through operational amplifier U1A, operational amplifier U1B, operational amplifier
U1C processing；The one end the resistance R4 connects the output end of operational amplifier U1A, and the other end connects one end of resistance R7 and company
Microprocessor is connect for U phase hall signal to be sent into microprocessor；The output of the one end resistance R5 connection operational amplifier U1B
End, the other end connect one end of resistance R8 and connect microprocessor for V phase hall signal to be sent into microprocessor；The electricity
The output end of the one end R6 connection operational amplifier U1C is hindered, the other end connects one end of resistance R9 and connects microprocessor and is used for
W phase hall signal is sent into microprocessor；The resistance R7, resistance R8, resistance R9 the other end be grounded；Microprocessor meeting
The position of rotor and direction of rotation are judged according to the U phase, V phase, W phase hall signal that receive.
By the frequency tripling signal HALL-UVW of the available output of the circuit diagram and three-phase motor HALL signal U of input,
The true value relationship formula of V, W,In motor operation course, HALL signal
U, V, W synchronization only have a signal hopping edge variation, from true value relationship formula it can be concluded that, HALL-UVW level change one
It is secondary.Realize the purpose of signal synthesis.
XOR gate belongs to logic gate device, and device side rise and fall speed is very fast, is particularly suitable for motor high speed and transports
Turn, the high occasion of HALL signal frequency, and circuit structure is simple, cost is relatively low, can greatly improve circuit reliability.
Compared with prior art, the advantages of the utility model:
1. the utility model will test three road HALL signal of motor synthesis all the way three-phase HALL signal to calculate motor speed
And rotor-position, compared with three road HALL signal detection schemes of the prior art, the resource of the microprocessor needed is few；Compared to only
Using HALL signal detection scheme all the way, high resolution, dynamic response are good；
2. the utility model is simple, low in cost using the circuit structure of XOR gate synthesis three-phase HALL signal, it is suitable for
The high occasion of motor, the HALL signal frequency of running at high speed；And circuit structure is simple, and circuit reliability greatly improves.
Detailed description of the invention
Fig. 1 is three road HALL signal of the utility model and composite signal and calculating rotation speed relation figure；
Fig. 2 is the circuit diagram of the example of the utility model one；
Fig. 3 is the circuit diagram of the example of the utility model two.
Specific embodiment
It elaborates below in conjunction with attached drawing to the utility model.
Embodiment one:
As shown in Fig. 2, a kind of motor hall sensor signal detection circuit of the present embodiment, including filter circuit, signal close
At circuit and signal bleeder circuit.
Signal filter circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2 and capacitor C3；Signal synthesis
Circuit includes XOR gate U1B, XOR gate U1C, XOR gate U1D, XOR gate U2B, XOR gate U2C and XOR gate U2D；Signal partial pressure
Circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9.
Motor Hall input signal is U phase HALL signal, V phase HALL signal, W phase HALL signal.
Resistance R1 connection U phase HALL signal accesses the leading-in end 4 of XOR gate U1B by resistance R1 after capacitor C3 filtering；
Resistance R2 connection V phase HALL signal accesses the leading-in end 9 of XOR gate U1C by resistance R2 after capacitor C2 filtering；Resistance R3 connects
W phase HALL signal is connect, by resistance R3, the leading-in end 12 of XOR gate U1D is accessed after capacitor C1 filtering；Capacitor C1, capacitor C2, electricity
Hold C3 to be grounded；The output end 6 of XOR gate U1B and the output end 8 of XOR gate U1C are input to 4 He of leading-in end of XOR gate U2B
Leading-in end 5；The output end 11 of XOR gate U1D accesses the leading-in end 10 of XOR gate U2C, XOR gate U2C output end 8 and XOR gate
The output end 6 of U2B accesses the leading-in end 13 and leading-in end 12 of XOR gate U2D.In the present embodiment, choosing model is SN74HC86D
Exclusive or gate device, device tool needs using two panels SN74HC86D in the present embodiment there are four exclusive or gate cell；U1B,
U1C, U1D are with a piece of XOR gate device, U2B, U2C, and U2D is with a piece of XOR gate device.The 5 of device U1,10,13 pins connect
Ground, the 9 pins ground connection of device U2；11 pins of device U2 export frequency tripling signal HALL-UVW, as shown in Fig. 1；The signal connects
It is connected to the capture pin of microprocessor, is input to the capturing unit of microprocessor internal, for calculating the revolving speed of motor.
In the present embodiment, signal bleeder circuit signal is derived from by the processed hall signal of U1B, U1C, U1D, at it
The hall signal after filtering signal processing can also be directly taken in his embodiment, but U1B, U1C, U1D output have low-resistance
The impedance matching of circuit may be implemented in anti-characteristic, eliminates the impedance coupler between front stage circuit, so the present embodiment is excellent
First choose this mode；The signal of the output pin 6 of U1 obtains U phase signals HALL-U after resistance R4 and resistance R7 partial pressure；U1
Output pin 8 signal by resistance R5 and resistance R8 partial pressure after obtain V phase signals HALL-V；The signal of the output pin 11 of U1 passes through
W phase signals HALL-W is obtained after crossing resistance R6 and resistance R9 partial pressure；The connection of tri- road HALL signal of HALL-U, HALL-V, HALL-W
Three common digital I/O pins of microprocessor, for judging the direction of rotation of rotor-position and rotor.
By the frequency tripling signal HALL-UVW of the available output of the circuit diagram and three-phase motor HALL signal U of input,
The true value relationship formula of V, W,In motor operation course, HALL signal
U, V, W synchronization only have a signal hopping edge variation, from true value relationship formula it can be concluded that, HALL-UVW level change one
It is secondary；Realize the purpose of signal synthesis.
The present embodiment is particularly suitable for motor and is run at high speed using the circuit of XOR gate synthesis three-phase HALL signal, HALL
The high occasion of signal frequency, and circuit structure is simple, and cost is relatively low, can greatly improve circuit reliability.
Embodiment two:
As shown in figure 3, a kind of motor hall sensor signal detection circuit of the present embodiment, including filter circuit, signal point
Volt circuit and signal synthesis circuit, wherein filter circuit and signal bleeder circuit are identical with embodiment one；Signal synthesis circuit
Realize that three road signals synthesize the function of frequency tripling signal all the way using operational amplifier and comparator.
Operational amplifier in the present embodiment uses four high guaily unit device, including U1A, U1B, U1C, U1D tetra- individually to transport
Amplifier, U1A, U1B are calculated, the output end of U1C connect composition voltage follower with the inverting input terminal of its own, with mutually defeated
Enter end to be separately connected by filtered U, V, W three-phase hall signal, the i.e. same phase of homophase input the terminating resistor R1, U1B of U1A
Input terminating resistor R2, the homophase input terminating resistor 3 of U1C；Output end is separately connected signal bleeder circuit, the i.e. output of U1A
The output terminating resistor R6 of output the terminating resistor R5, U1C of terminating resistor R4, U1B, while output end distinguishes connecting resistance R10,
The non-inverting input terminal of operational amplifier U1D is connected to after R11, R12.The output end of U1D is connected to anti-phase input by resistance R14
End, while inverting input terminal is grounded by resistance R13, the output end of U1D is connected to the inverting input terminal of comparator U2, comparator
The output end of U2 is connected to power supply VCC by resistance R15, while exporting frequency tripling the signal HALL-UVW, comparator U2 of synthesis
Non-inverting input terminal access 5V voltage.
Composite signal circuit operation principle in the present embodiment is as follows:
The output end of operational amplifier U1A, U1B, U1C connect composition voltage follower, same phase with inverting input terminal
Input terminal is separately connected by filtered U, V, W three-phase hall signal, and output end has low-impedance characteristic, realizes circuit
Impedance matching, output end is separately connected the input terminal of signal bleeder circuit；The output end of U1A, U1B, U1C pass through resistance respectively
R10, R11, R12 are connected to the non-inverting input terminal of operational amplifier U1D, and it is defeated that the output end of U1D by resistance R14 is connected to reverse phase
Enter end, while inverting input terminal is grounded by resistance R13；Operational amplifier U1D is connected into in-phase adder, specifically, design electricity
R10 is hindered, R11, R12 resistance value is equal, and resistance R13, R14 resistance value is equal, and the high level of hall signal is 5V, low level 0V, can
To calculate, when the level state of UVW is 100,010,001 three kind of state, the voltage of operational amplifier U1D output is
3.33V, when the level state of UVW is 101,110,011 three kinds of states, the voltage of operational amplifier U1D output is 6.66V.
The inverting input terminal of the output end connection comparator U2 of U1D, the homophase input of U2 terminate 5V power supply, and the output end of U2 is open-drain pole
Output, connects pull-up resistor R15；When the voltage of operational amplifier U1D output is 3.33V, the output of U2 is high level, works as operation
When the voltage of amplifier U1D output is 6.66V, the output of U2 is low level, in motor operation course, six kinds of level states of UVW
Occur according to a certain order, then realizes the purpose of signal synthesis by the signal synthesis circuit.
Claims (10)
1. a kind of motor hall sensor signal detection circuit, it is characterised in that: including for the motor hall signal to input into
Filter circuit, No. three motor hall signals for that will input of row filtering synthesize the signal synthesis electricity of frequency tripling signal all the way
Road and signal bleeder circuit；
Motor hall signal accesses signal synthesis circuit after filter circuit filters, defeated after signal synthesis circuit synthesis
Only has the frequency tripling signal of the hopping edge variation an of signal for synchronization all the way out；
Signal bleeder circuit will be accessed through the filtered signal of filter circuit, or will be through the filtered signal of filter circuit through different
Or bleeder circuit is accessed after door or operational amplifier processing；
The motor hall signal of input is U phase hall signal, V phase hall signal and W phase hall signal.
2. a kind of motor hall sensor signal detection circuit according to claim 1, it is characterised in that:
The signal synthesis circuit includes XOR gate U1B, XOR gate U1C, XOR gate U1D, XOR gate U2B, XOR gate U2C and different
Or door U2D；
Mono- leading-in end 4 of the XOR gate U1B connects U phase hall signal, another leading-in end 5 ground connection, output end 6 connects XOR gate
A leading-in end 4 of U2B；
Mono- leading-in end 9 of the XOR gate U1C connects V phase hall signal, another leading-in end 10 ground connection, output end 8 connects XOR gate
Another leading-in end 5 of U2B；
Mono- leading-in end 12 of the XOR gate U1D connects W phase hall signal, another leading-in end 13 ground connection, output end 11 connects exclusive or
A leading-in end 10 of door U2C；
The XOR gate U2B output end 6 connects a leading-in end 12 of XOR gate U2D；
Another leading-in end 9 of XOR gate U2C is grounded, and output end 8 connects another leading-in end 13 of XOR gate U2D；
The XOR gate U2D output end 11 connects microprocessor.
3. a kind of motor hall sensor signal detection circuit according to claim 2, it is characterised in that:
The signal filter circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2 and capacitor C3；
A termination U phase hall signal of the resistance R1, another termination capacitor C3 connect XOR gate U1B leading-in end 4 simultaneously；
A termination V phase hall signal of the resistance R2, another termination capacitor C2 connect XOR gate U1C leading-in end 9 simultaneously；
A termination W phase hall signal of the resistance R3, another termination capacitor C1 connect XOR gate U1D leading-in end 12 simultaneously；
The capacitor C1, capacitor C2, capacitor C3 the other end be grounded.
4. a kind of motor hall sensor signal detection circuit according to claim 3, it is characterised in that:
The signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9；
The connection of the one end the resistance R4 connects one end of resistance R7 simultaneously through the filtered U phase hall signal of filter circuit, the other end
And connection microprocessor is used to U phase hall signal being sent into microprocessor；
The connection of the one end the resistance R5 connects one end of resistance R8 simultaneously through the filtered V phase hall signal of filter circuit, the other end
And connection microprocessor is used to V phase hall signal being sent into microprocessor；
The connection of the one end the resistance R6 connects one end of resistance R9 simultaneously through the filtered W phase hall signal of filter circuit, the other end
And connection microprocessor is used to W phase hall signal being sent into microprocessor；
The resistance R7, resistance R8, resistance R9 the other end be grounded.
5. a kind of motor hall sensor signal detection circuit according to claim 3, it is characterised in that:
The signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9；
The hall signal that the signal bleeder circuit is taken is handled by U1B, U1C, U1D；
The one end the resistance R4 connects the output end 6 of XOR gate U1B, and the other end connects one end of resistance R7 and connects micro process
Device is used to U phase hall signal being sent into microprocessor；
The one end the resistance R5 connects the output end 8 of XOR gate U1C, and the other end connects one end of resistance R8 and connects micro process
Device is used to V phase hall signal being sent into microprocessor；
The one end the resistance R6 connects the output end 11 of XOR gate U1D, and the other end connects one end of resistance R9 and connects micro- place
Device is managed to be used to W phase hall signal being sent into microprocessor；
The resistance R7, resistance R8, resistance R9 the other end be grounded.
6. a kind of motor hall sensor signal detection circuit, feature according to claim 2 to 5 any claim exist
In:
XOR gate in the signal synthesis circuit chooses SN74HC86D XOR gate.
7. a kind of motor hall sensor signal detection circuit according to claim 1, it is characterised in that:
The signal synthesis circuit includes operational amplifier U1A, operational amplifier U1B, operational amplifier U1C, operational amplifier
U1D, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15 and comparator U2；
The homophase input of the operational amplifier U1A terminates U phase hall signal, and the homophase input of operational amplifier U1B terminates V phase
Hall signal, the homophase input of operational amplifier U1C terminate W phase hall signal, operational amplifier U1A, operational amplifier U1B,
The output end of operational amplifier U1C connect composition voltage follower with itself inverting input terminal；
The non-inverting input terminal of operational amplifier U1D is accessed after the output terminating resistor R10 of the operational amplifier U1A, operation is put
The non-inverting input terminal of operational amplifier U1D, the output end of operational amplifier U1C are accessed after the output terminating resistor R11 of big device U1B
The non-inverting input terminal of operational amplifier U1D is accessed after connecting resistance R12；
It is connect after the output terminating resistor R14 of the operational amplifier U1D with itself inverting input terminal, operational amplifier U1D's
It is grounded after inverting input terminal while connecting resistance R13；
The inverting input terminal of the output end access comparator U2 of the operational amplifier U1D, the output terminating resistor of comparator U2
Power supply VCC is connected to after R15, the non-inverting input terminal of comparator U2 accesses 5V voltage；
The output of the comparator U2 terminates microprocessor.
8. a kind of motor hall sensor signal detection circuit according to claim 7, it is characterised in that:
The signal filter circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2 and capacitor C3；
A termination U phase hall signal of the resistance R1, another termination capacitor C3 connect the homophase input of operational amplifier U1A simultaneously
End；
A termination V phase hall signal of the resistance R2, another termination capacitor C2 connect the homophase input of operational amplifier U1B simultaneously
End；
A termination W phase hall signal of the resistance R3, another termination capacitor C1 connect the homophase input of operational amplifier U1C simultaneously
End；
The capacitor C1, capacitor C2, capacitor C3 the other end be grounded.
9. a kind of motor hall sensor signal detection circuit according to claim 8, it is characterised in that:
The signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9；
The connection of the one end the resistance R4 connects one end of resistance R7 simultaneously through the filtered U phase hall signal of filter circuit, the other end
And connection microprocessor is used to U phase hall signal being sent into microprocessor；
The connection of the one end the resistance R5 connects one end of resistance R8 simultaneously through the filtered V phase hall signal of filter circuit, the other end
And connection microprocessor is used to V phase hall signal being sent into microprocessor；
The connection of the one end the resistance R6 connects one end of resistance R9 simultaneously through the filtered W phase hall signal of filter circuit, the other end
And connection microprocessor is used to W phase hall signal being sent into microprocessor；
The resistance R7, resistance R8, resistance R9 the other end be grounded.
10. a kind of motor hall sensor signal detection circuit according to claim 8, it is characterised in that:
The signal bleeder circuit includes resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9；
The hall signal that the signal bleeder circuit is taken passes through operational amplifier U1A, operational amplifier U1B, operational amplifier
U1C processing；
The one end the resistance R4 connects the output end of operational amplifier U1A, and the other end connects one end of resistance R7 and connects micro-
Processor is used to U phase hall signal being sent into microprocessor；
The one end the resistance R5 connects the output end of operational amplifier U1B, and the other end connects one end of resistance R8 and connects micro-
Processor is used to V phase hall signal being sent into microprocessor；
The one end the resistance R6 connects the output end of operational amplifier U1C, and the other end connects one end of resistance R9 and connects micro-
Processor is used to W phase hall signal being sent into microprocessor；
The resistance R7, resistance R8, resistance R9 the other end be grounded.
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| CN201820899497.9U CN208226830U (en) | 2018-06-11 | 2018-06-11 | A kind of motor hall sensor signal detection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014160A (en) * | 2019-12-18 | 2021-06-22 | 珠海格力电器股份有限公司 | Phase current correction circuit for brushless DC motor and brushless DC motor |
| CN113325192A (en) * | 2021-05-28 | 2021-08-31 | 湖南湘依铁路机车电器股份有限公司 | Frequency doubling method for shaft end Hall speed sensor |
-
2018
- 2018-06-11 CN CN201820899497.9U patent/CN208226830U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014160A (en) * | 2019-12-18 | 2021-06-22 | 珠海格力电器股份有限公司 | Phase current correction circuit for brushless DC motor and brushless DC motor |
| CN113325192A (en) * | 2021-05-28 | 2021-08-31 | 湖南湘依铁路机车电器股份有限公司 | Frequency doubling method for shaft end Hall speed sensor |
| CN113325192B (en) * | 2021-05-28 | 2024-01-16 | 湖南湘依铁路机车电器股份有限公司 | Frequency multiplication method for shaft end Hall speed sensor |
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Effective date of registration: 20191016 Address after: 710000 3 / F, auxiliary building, Oukai entrepreneurial Town, No. 25, development avenue, Xiliu Street office, Xi'an high tech Zone, Shaanxi Province Patentee after: Xi'an Haige Electrical Technology Co., Ltd. Address before: 710077 Xionghua Science Park Complex Building, 72 Jinye Road, Yanta District, Xi'an City, Shaanxi Province, 3rd Floor Patentee before: Xie Hong Pu |