CN107257218A - The drive system of direct current generator - Google Patents
The drive system of direct current generator Download PDFInfo
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- CN107257218A CN107257218A CN201710565029.8A CN201710565029A CN107257218A CN 107257218 A CN107257218 A CN 107257218A CN 201710565029 A CN201710565029 A CN 201710565029A CN 107257218 A CN107257218 A CN 107257218A
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- photoelectric coupling
- direct current
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- 238000001514 detection method Methods 0.000 claims abstract description 8
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- 238000005859 coupling reaction Methods 0.000 claims description 107
- 230000005622 photoelectricity Effects 0.000 claims description 2
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- 239000003990 capacitor Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 235000008434 ginseng Nutrition 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- 101000717877 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 40S ribosomal protein S11-A Proteins 0.000 description 2
- 101000717881 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 40S ribosomal protein S11-B Proteins 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a kind of drive system of direct current generator, including：Direct current generator；Rotating speed measring circuit, obtains the tach signal of the direct current generator；Current detection circuit obtains the current electrical signal of the direct current generator；Position detecting circuit, obtains position signalling；Processor, according to the control information of the direct current generator, the tach signal, the current electrical signal and the position signalling, is generated and output pulse width modulated signal；Drive circuit, according to the break-make of the pulse width modulating signal controlling switch device, to control the running status of the direct current generator.The present invention by lower-cost direct current generator by being applied to servo-control system, discard tradition the semiclosed loop type of drive of direct current generator, using the more preferable closed-loop type of drive of control accuracy, direct current generator is used in servo-drive system to realize, reduce servo-drive system cost, increase the power output of servo-drive system, and the accurate purpose reliably controlled is carried out to direct current generator.
Description
Technical field
The present embodiments relate to motor-drive technique, more particularly to a kind of drive system of direct current generator.
Background technology
In Mechanical course field, such as precision machine tool, manufactruing equipment of automobile and robot, using servo-drive system accurately
Follow or reappear Machine Movement Process, for example, the mechanical displacement of output is accurately tracked by the displacement of input.
Using the motion of driving servomotor controller tool element more than existing servo-drive system.Servomotor belongs to accurate electricity
Machine, with the characteristic such as electromechanical time constant is small, the linearity is high, rotation is smooth and torque is stable.Thus servomotor is in servo system
, being capable of the speed of control machinery element and position exactly as executive component in system.However, because servomotor belongs to essence
Cipher telegram machine, the requirement to its material, structure and processing technology will be significantly larger than common electric machine.And servomotor is limited by technique
System, it is difficult to accomplish high-power output.
Therefore, at present using servomotor servo-drive system is costly, power is relatively low, it is impossible to realize in control cost
Under the premise of increase servo-drive system power output.
The content of the invention
The present invention provides a kind of drive system of direct current generator, and lower-cost direct current generator is applied into SERVO CONTROL system
System, the semiclosed loop type of drive for the direct current generator that discards tradition, using the more preferable closed-loop type of drive of control accuracy, to realize
Direct current generator is used in servo-drive system, servo-drive system cost is reduced, increases the power output of servo-drive system, and to direct current generator
Carry out the accurate purpose reliably controlled.
The embodiments of the invention provide a kind of drive system of direct current generator, including：
Direct current generator；
Rotating speed measring circuit, is connected by encoder with the direct current generator, the reality for detecting the direct current generator
Rotating speed, obtains the tach signal of the direct current generator；
Current detection circuit, is electrically connected with the direct current generator, the actual current for detecting the direct current generator, is obtained
The current electrical signal of the direct current generator；
Position detecting circuit, the position of the position limitation protection part for detecting the direct current generator, obtains position signalling, institute
The motor shaft for stating position limitation protection part and the direct current generator is mechanically connected；
Processor, is electrically connected with the Rotating speed measring circuit, current detection circuit and position detecting circuit, according to institute respectively
Control information, the tach signal, the current electrical signal and the position signalling of direct current generator are stated, generates and exports pulse
Bandwidth modulation signals；
Drive circuit, is electrically connected with the processor, receives the pulse width modulating signal of the processor output,
According to the break-make of the pulse width modulating signal controlling switch device, to control the running status of the direct current generator.
Preferably, the control information includes：The angle that the setting speed of the direct current generator and/or setting are rotated.
Preferably, the running status of the direct current generator includes：Start, stop or invert.
Preferably, the drive circuit also includes：Overcurrent protection module, for being set when the current electrical signal more than electric current
During definite value, the drive circuit controls the direct current generator out of service, and exports the first error signal to the processor.
Preferably, the drive circuit also includes：Temperature protection module, for when the temperature for detecting the drive circuit
During higher than desired temperature, the drive circuit controls the direct current generator out of service, and to processor output the
Two error signals.
Preferably, the drive system of the direct current generator also includes photoelectric isolating circuit；
The processor by the photoelectric isolating circuit and the Rotating speed measring circuit, the position detecting circuit and/
Or the drive circuit connection.
Preferably, the tach signal includes the signal of rotating speed first and rotating speed secondary signal, the photoelectric isolating circuit bag
Include the first photoelectric coupling chip and the second photoelectric coupling chip；
The signal input tube pin of the first photoelectric coupling chip is electrically connected with the signal of rotating speed first；
The signal output pin of the first photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the first photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the first photoelectric coupling chip is electrically connected with the second power supply signal line；It is described
3rd reference voltage input pin of the first photoelectric coupling chip is electrically connected with the second ground signal line；
The signal input tube pin of the second photoelectric coupling chip is electrically connected with the rotating speed secondary signal；
The signal output pin of the second photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the second photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the second photoelectric coupling chip is electrically connected with the second power supply signal line；It is described
3rd reference voltage input pin of the first photoelectric coupling chip is electrically connected with the second ground signal line.
Preferably, the position signalling includes the signal of position first and position secondary signal, the photoelectric isolating circuit bag
Include the 3rd photoelectric coupling chip and the 4th photoelectric coupling chip；
The signal input tube pin of the 3rd photoelectric coupling chip is electrically connected with the signal of position first；
The signal output pin of the 3rd photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the 3rd photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the 3rd photoelectric coupling chip is electrically connected with the 3rd power supply signal line；
3rd reference voltage input pin of the 3rd photoelectric coupling chip is electrically connected with second ground signal line；
The signal input tube pin of the 4th photoelectric coupling chip is electrically connected with the position secondary signal；
The signal output pin of the 4th photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the 4th photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the 4th photoelectric coupling chip is electrically connected with the 3rd power supply signal line；
3rd reference voltage input pin of the 4th photoelectric coupling chip is electrically connected with second ground signal line.
Preferably, the pulse width modulating signal includes the signal of pulse width modulation first and pulse width modulation second
Signal, the photoelectric isolating circuit includes the 5th photoelectric coupling chip and the 6th photoelectric coupling chip；
The signal input tube pin of the 5th photoelectric coupling chip is electrically connected with the signal of pulse width modulation first；
The signal output pin of the 5th photoelectric coupling chip is electrically connected with the drive circuit；
First reference voltage input pin of the 5th photoelectric coupling chip is electrically connected with second ground signal line；
Second reference voltage input pin of the 5th photoelectric coupling chip is electrically connected with the 4th power supply signal line；
3rd reference voltage input pin of the 5th photoelectric coupling chip is electrically connected with first ground signal line；
The signal input tube pin of the 6th photoelectric coupling chip is electrically connected with the pulse width modulation secondary signal；
The signal output pin of the 6th photoelectric coupling chip is electrically connected with the drive circuit；
First reference voltage input pin of the 6th photoelectric coupling chip is electrically connected with second ground signal line；
Second reference voltage input pin of the 6th photoelectric coupling chip is electrically connected with the 4th power supply signal line；
3rd reference voltage input pin of the 6th photoelectric coupling chip is electrically connected with first ground signal line.
The present invention has abandoned Traditional DC motor by the way that lower-cost direct current generator is applied into servo-control system
Semiclosed loop type of drive, using the more preferable closed-loop type of drive of control accuracy, solves the servo at present using servomotor
System cost is expensive, power is relatively low, it is impossible to which realize increases the power output problem of servo-drive system on the premise of cost is controlled, real
Show the purpose that direct current generator is used in servo-drive system, reached reduction servo-drive system cost, increase the output of servo-drive system
Power, and the accurate effect reliably controlled is carried out to direct current generator.
Brief description of the drawings
Fig. 1 is the driving system structure schematic diagram for the direct current generator that the embodiment of the present invention one is provided；
Fig. 2 is the drive circuit figure of the drive system of direct current generator in the embodiment of the present invention two；
Fig. 3 A and Fig. 3 B are the fault-signal display circuit figures of the drive system of direct current generator in the embodiment of the present invention two；
Fig. 4 A~Fig. 4 C are the photoelectric isolating circuit figures of the drive system of direct current generator in the embodiment of the present invention three.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is the driving system structure schematic diagram for the direct current generator that the embodiment of the present invention one is provided, and the present embodiment is applied to
Electric cylinders system is driven, following part is specifically included：
Direct current generator 10；
Rotating speed measring circuit 50, is connected by encoder 20 with the direct current generator 10, for detecting the direct current generator
10 actual speed, obtains the tach signal of the direct current generator 10；
Current detection circuit 60, is electrically connected with the direct current generator 10, the actual electricity for detecting the direct current generator 10
Stream, obtains the current electrical signal of the direct current generator 10；
Position detecting circuit 40, the position of the position limitation protection part 30 for detecting the direct current generator 10, obtains position
Signal, the motor shaft of the position limitation protection part 30 and the direct current generator 10 is mechanically connected；
Wherein, position detecting circuit 40 includes limit switch, the screw mandrel that the motor shaft of direct current generator 10 is mechanically connected,
Guard block 30 is arranged on one end of screw mandrel.Direct current generator 10 operationally, drive screw mandrel linear motion, guard block 30 with
Screw mandrel is moved together.When screw lead reaches ultimate range, the triggering limit switch of guard block 30, position detecting circuit 40 is defeated
Go out limit position signal.
Processor 80, is electrically connected with the Rotating speed measring circuit 50, current detection circuit 60 and position detecting circuit 40 respectively
Connect, it is raw according to the control information of the direct current generator 10, the tach signal, the current electrical signal and the position signalling
Into simultaneously output pulse width modulated signal；
Drive circuit 70, is electrically connected with the processor 80, receives the pulse width tune that the processor 80 is exported
Signal processed, according to the break-make of the pulse width modulating signal controlling switch device, to control the operation of the direct current generator 10
State.
Specifically, the control information includes：The angle that the setting speed of the direct current generator and/or setting are rotated.
Specifically, the running status of the direct current generator includes：Start, stop or invert.
The operation principle of the drive system of the direct current generator is：Current electrical signal, the rotating speed of direct current generator 10 are detected in real time
Signal and position signalling, when guard block 30 does not reach the limit of position, processor 80 is according to current electrical signal, tach signal
With control information running control algolithm, generation pulse width modulating signal makes direct current generator 10 with stable operation.Work as guard block
30 when moving to extreme position, triggers limit switch.Position detecting circuit 40 sends limit position signal to processor 80.Processing
Device receives limit position signal, and the pulse width modulation that being sent to drive circuit 70 makes direct current generator 10 stall or invert is believed
Number, direct current generator 10 is stalled or is inverted, so as to realize the protection to mechanism.Pulse width modulation is to the real-time control of speed
System, forms a closed-loop control, so as to form the effective speed control accurate in real time of a stabilization.
The technical scheme of the present embodiment, by the way that lower-cost direct current generator is applied into servo-control system, is abandoned
The semiclosed loop type of drive of Traditional DC motor, using the more preferable closed-loop type of drive of control accuracy, solves current use
The servo-drive system of servomotor is costly, power is relatively low, it is impossible to which realize increases servo-drive system on the premise of cost is controlled
Power output problem, realizes the purpose that direct current generator is used in servo-drive system, has reached reduction servo-drive system cost, increase
The power output of servo-drive system, and the accurate effect reliably controlled is carried out to direct current generator.
Embodiment two
On the basis of the various embodiments described above, the drive system of direct current generator also includes：
Overcurrent protection module, for when the current electrical signal is more than current setting value, the drive circuit to control institute
State direct current generator out of service, and the first error signal is exported to the processor.
Temperature protection module, for when detect the drive circuit temperature be higher than desired temperature when, the driving
Circuit controls the direct current generator out of service, and exports the second error signal to the processor.
On the basis of above-mentioned each technical scheme, drive circuit includes H-bridge circuit, it is allowed to large driven current density direct current generator,
And internal resistance is smaller, the heating of drive circuit board can be effectively reduced, realizes that direct current generator is stable and effectively works.
Specifically, by taking Fig. 2 as an example, chip U1 is numeral for H bridges motor drive ic DRV8432, chip U1 pin 10
Regulation power supply filters end (VREG), electrical connection electric capacity C107 first end, electric capacity C107 the second end electric connection resistance R102's
First end, resistance R102 the second end electrically connects the first ground signal line, i.e. chip U1 pin 10, electric capacity C107, resistance
R102 and the first ground signal line are connected in series.Chip U1 pin 11, pin 12 and pin 13 is mode selection terminal, chip U1
Pin 11 and pin 13 electrically connect electric capacity C107 the second end, the chip U1 electrical connection chip of pin 12 U1 pin 10,
It is H bridges current limliting mode of operation arranged side by side to configure chip U1.
Chip U1 pin 22 is half-bridge D output ends (OUT_D), electrical connection inductance L114 first end, inductance L114 the
Two ends are electrically connected with binding post J1 chip U1 pin 2, i.e. inductance L114 is series at chip U1 pin 22 and terminals
Between sub- J1 chip U1 pin 2, wherein inductance L114 parameter is 4.7uH/8.7A；Chip U1 pin 20 (BST_D)
Electric capacity C124 first end is electrically connected, electric capacity C124 the second end is electrically connected with inductance L114 first end, electric capacity C124 ginseng
Number is 0.1uF/100V, and the pin 22 for being chip U1 provides external capacitor.
Chip U1 pin 25 is half-bridge C output ends (OUT_C), electrical connection inductance L113 first end, inductance L113 the
Two ends are electrically connected with binding post J1 chip U1 pin 2, i.e. inductance L113 is series at chip U1 pin 25 and terminals
Between sub- J1 chip U1 pin 2, wherein inductance L113 parameter is 4.7uH/8.7A；Chip U1 pin 27 (BST_C)
Electric capacity C123 first end is electrically connected, electric capacity C123 the second end is electrically connected with inductance L113 first end, electric capacity C123 ginseng
Number is 0.1uF/100V, and the pin 25 for being chip U1 provides external capacitor.
Chip U1 pin 30 is half-bridge B output ends (OUT_B), electrical connection inductance L112 first end, inductance L112 the
Two ends are electrically connected with binding post J1 chip U1 pin 1, i.e. inductance L112 is series at chip U1 pin 30 and terminals
Between sub- J1 chip U1 pin 1, wherein inductance L112 parameter is 4.7uH/8.7A；Chip U1 pin 28 (BST_B)
Electric capacity C122 first end is electrically connected, electric capacity C122 the second end is electrically connected with inductance L112 first end, electric capacity C122 ginseng
Number is that the pin 30 that 0.1uF/100V is chip U1 provides external capacitor.
Chip U1 pin 33 is half-bridge A output ends (OUT_A), electrical connection inductance L111 first end, inductance L111 the
Two ends are electrically connected with binding post J1 chip U1 pin 1, i.e. inductance L111 is series at chip U1 pin 33 and terminals
Between sub- J1 chip U1 pin 1, wherein inductance L111 parameter is 4.7uH/8.7A；Chip U1 pin 35 (BST_A)
Electric capacity C121 first end is electrically connected, electric capacity C121 the second end is electrically connected with inductance L111 first end, electric capacity C121 ginseng
Number is that the pin 33 that 0.1uF/100V is chip U1 provides external capacitor.
Chip U1 pin 2 is overheat caution signal endWhen drive circuit is overheated, chip U1 shut-offs, and
The chip U1 output low level of pin 2；Chip U1 pin 3 is error signal end When chip U1 excessively streams
Or when under-voltage, chip U1 shut-offs, and the chip U1 output low level of pin 3；Chip U1 pin 4 is half-bridge a-signal input
(PWM_A)；Chip U1 pin 6 is half-bridge B signal input (PWM_B).
Chip P4 is current sensor, and its model can be ACS758 or ACS781, as shown in Fig. 2 with current sensor
Exemplified by chip ACS758 chips, chip P4 pin 1 is power end (VCC), the chip P4 power supply signal line of pin 1 and first
V3_3 is electrically connected, meanwhile, chip P4 pin 1 is electrically connected with electric capacity CP41 first end, electric capacity CP41 the second end electrical connection
Second ground signal line.Electric capacity CP41 parameter is 0.1uF.Chip P4 pin 2 is earth terminal (GND), and electrical connection second connects
Earth signal line.Chip P4 pin 3 is current signal output end (VIOUT), electric connection resistance RP41 first end, resistance RP41
The second end output current analog signal ADC7, current analog signal ADC7 electrically connects with processor.Chip P4 pin 4 is electricity
Flow signal input part (IP+), electrical connection inductance L112 the second end.Chip P4 pin 5 is current signal input (IP-),
The sub- J1 of electrical connection terminals chip P4 pin 1.
Further, fault-signal display circuit is configured with drive circuit, the circuit uses transistor amplifier.Figure
3A show heat alarm display circuit, the 4th power supply signal line VCC_5V electric connection resistances R105 first end, resistance R105
The second end electrical connection light emitting diode DOTW anode tap, i.e. resistance R105 and light emitting diode DOTW are connected in series.It is luminous
Diode DOTW cathode terminal electrical connection triode Q1 pin 2.The first of the triode Q1 electric connection resistance R106 of pin 1
End.Resistance R106 the second end is electrically connected with chip U1 pin 2.When drive circuit is overheated, chip U1 pin 2 exports low
Level, triode Q1 conducting ground connection, light emitting diode DOTW sends light.Wherein, triode Q1 model can be S9015_
PNP。
Fig. 3 B show over-current signal display circuit, and circuit connection is used and Fig. 3 A identical connected modes.
The technical scheme of the present embodiment, has reached reduction servo-drive system cost, increases the power output of servo-drive system, and
The accurate effect reliably controlled is carried out to direct current generator., can be in direct current by overcurrent protection module and temperature protection module
When motor is stalled, recognize that the reason for motor is stalled, i.e. processor receive the first error signal and be then shown as electric current mistake in time
Greatly, processor receives the second error signal and is then shown as that temperature is too high or other reasonses.The technical scheme of the present embodiment is solved
Need to carry out whole system malfunction elimination when failure occurs, the problem of workload is big, system can be accurately judged to therefore
The reason for barrier and position, have reached the effect for efficiently solving the system failure.
Embodiment three
Fig. 4 A~Fig. 4 C are the photoelectric isolating circuit figures of the drive system of direct current generator in the embodiment of the present invention three, above-mentioned
On the basis of each embodiment, the drive system of direct current generator also includes：Photoelectric isolating circuit.The processor passes through the photoelectricity
Isolation circuit is connected with the Rotating speed measring circuit, the position detecting circuit and/or the drive circuit.
As shown in Figure 4 A, the photoelectric isolating circuit includes the first photoelectric coupling chip U2；
The signal input tube pin 3 of the first photoelectric coupling chip U2 is electrically connected with the first signal of rotating speed HEDS_A；
The signal output pin 5 of the first photoelectric coupling chip U2 is electrically connected with the processor；
The first reference voltage input pin 1 of the first photoelectric coupling chip U2 and the first power supply signal line MOTOR_5V
Electrical connection；
The second reference voltage input pin 6 of the first photoelectric coupling chip U2 and the second power supply signal line VCC_5V_
CPU is electrically connected；The 3rd reference voltage input pin of the first photoelectric coupling chip U2 is electrically connected with the second ground signal line.
Specifically, chip U2 model high speed photo coupling PS9713, chip U2 pin 1 are supplied by resistance R201 and first
Electrical signal line MOTOR_5V is electrically connected.Chip U2 pin 6 also electrically connects electric capacity C201 and resistance R202 first end, electric capacity
C201 the second end electrically connects the second ground signal line.The chip U2 electric connection resistance R202 of pin 5 the second end, electric capacity C202
First end and resistance R203 first end.Electric capacity C202 the second end and resistance R203 the second end electrical connection the second ground connection letter
Number line.
Second photoelectric coupling chip U3 circuit connecting mode is identical with the first photoelectric coupling chip U2；Second photoelectric coupling
Chip U3 signal input tube pin 3 is electrically connected with rotating speed secondary signal HEDS_B.Tach signal includes the orthogonal rotating speed of two-way the
One signal and rotating speed secondary signal, they can not only determine the rotating speed of direct current generator, can also judge that direct current generator rotates
Direction.
Preferably, as shown in Figure 4 B, the photoelectric isolating circuit includes the 3rd photoelectric coupling chip U4；
The signal input tube pin 2 of the 3rd photoelectric coupling chip U4 is electrically connected with the position signalling XW_A；
The signal output pin 4 of the 3rd photoelectric coupling chip U4 is electrically connected with the processor；
The first reference voltage input pin 1 of the 3rd photoelectric coupling chip U4 and the first power supply signal line
MOTOR_5V is electrically connected；
The second reference voltage input pin 4 of the 3rd photoelectric coupling chip U4 is electrically connected with the 3rd power supply signal line V3_3
Connect；
The 3rd reference voltage input pin 3 of the 3rd photoelectric coupling chip U4 is electrically connected with second ground signal line
Connect.
Specifically, chip U4 model low speed optocoupler TLP291, chip U4 pin 1 are supplied by resistance R401 and first
Electrical signal line MOTOR_5V is electrically connected.Chip U4 pin 4 is electrically connected by resistance R402 with the 3rd power supply signal line V3_3.Core
Piece U4 pin 4 also electrically connects electric capacity C402 first end, and electric capacity C402 the second end electrically connects the second ground signal line.3rd
Power supply signal line V3_3 is electrically connected by electric capacity C401 with the second ground signal line.
4th photoelectric coupling chip U5 signal input tube pin 2 is electrically connected with position secondary signal XW_B.Position signalling bag
Include the signal of position first and position secondary signal.Wherein the signal of position first is generated by the first limit switch, for limiting protection
First extreme position of part motion；Position secondary signal is generated by the second limit switch, for limiting guard block motion
Second extreme position.
Preferably, photoelectric isolating circuit can also include the 7th photoelectric coupling chip, the circuit of the 7th photoelectric coupling chip
Connected mode is identical with the 4th photoelectric coupling chip U5, the signal input tube pin of the 7th photoelectric coupling chip and first mistake
Signal OTW is electrically connected.Realize the Phototube Coupling between the first error signal OTW and processor.
Preferably, photoelectric isolating circuit can also include the 8th photoelectric coupling chip, the circuit of the 8th photoelectric coupling chip
Connected mode is identical with the 4th photoelectric coupling chip U5, the signal input tube pin of the 8th photoelectric coupling chip and second mistake
Signal FAULT is electrically connected.Realize the Phototube Coupling between the second error signal FAULT and processor.
Preferably, as shown in Figure 4 C, the photoelectric isolating circuit includes the 5th photoelectric coupling chip U8；
The signal input tube pin 1 of the 5th photoelectric coupling chip U8 and the first signal of pulse width modulation PWM_A_
CTR is electrically connected；
The signal output pin 5 of the 5th photoelectric coupling chip U8 is electrically connected with the drive circuit；
The first reference voltage input pin 1 of the 5th photoelectric coupling chip U8 is electrically connected with second ground signal line
Connect；
The second reference voltage input pin 6 of the 5th photoelectric coupling chip U8 and the 4th power supply signal line VCC_5V electricity
Connection；
The 3rd reference voltage input pin 4 of the 5th photoelectric coupling chip U8 is electrically connected with first ground signal line
Connect.
Specifically, chip U8 model high speed photo coupling PS9713, chip U8 pin 1 are supplied by resistance R801 and the 4th
Electrical signal line VCC_5V is electrically connected.Chip U8 pin 6 also electrically connects electric capacity C801 and resistance R802 first end, electric capacity C801
The second end electrically connect the first ground signal line.The chip U8 electric connection resistance R802 of pin 5 the second end, the of electric capacity C802
One end and resistance R803 first end.Electric capacity C802 the second end and resistance R803 the second end electrically connect the first ground signalling
Line.
6th photoelectric coupling chip U9 signal input tube pin 1 is electrically connected with pulse width modulation secondary signal PWM_A_CTR
Connect.
The technical scheme of the present embodiment, has reached reduction servo-drive system cost, increases the power output of servo-drive system, and
The accurate effect reliably controlled is carried out to direct current generator.By in processor and drive circuit, Rotating speed measring circuit and position
Detection circuit between photoelectric isolating circuit is set, solve direct current pusher side forceful electric power signal and processor weak electric signal it is direct
Connection, the problem of causing measurement inaccurate or even damage system has reached effective suppression system noise, has eliminated earth-return circuit interference
With the normal working effect of stabilization for ensureing system.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art it is various it is obvious change,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention is carried out by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (9)
1. a kind of drive system of direct current generator, it is characterised in that including：
Direct current generator；
Rotating speed measring circuit, is connected by encoder with the direct current generator, the actual speed for detecting the direct current generator,
Obtain the tach signal of the direct current generator；
Current detection circuit, is electrically connected with the direct current generator, the actual current for detecting the direct current generator, obtains described
The current electrical signal of direct current generator；
Position detecting circuit, the position of the position limitation protection part for detecting the direct current generator, obtains position signalling, the limit
The motor shaft of position guard block and the direct current generator is mechanically connected；
Processor, is electrically connected with the Rotating speed measring circuit, current detection circuit and position detecting circuit respectively, according to described straight
Control information, the tach signal, the current electrical signal and the position signalling of motor are flowed, is generated and output pulse width
Modulated signal；
Drive circuit, is electrically connected with the processor, receives the pulse width modulating signal of the processor output, according to
The break-make of the pulse width modulating signal controlling switch device, to control the running status of the direct current generator.
2. system according to claim 1, it is characterised in that the control information includes：The setting of the direct current generator
The angle that rotating speed and/or setting are rotated.
3. system according to claim 1 or 2, it is characterised in that the running status of the direct current generator includes：Start,
Stop or invert.
4. system according to claim 1, it is characterised in that the drive circuit also includes：Overcurrent protection module, is used for
When the current electrical signal is more than current setting value, the drive circuit controls the direct current generator out of service, Yi Jixiang
The processor exports the first error signal.
5. system according to claim 4, it is characterised in that the drive circuit also includes：Temperature protection module, is used for
When the temperature for detecting the drive circuit is higher than desired temperature, the drive circuit controls the direct current generator to stop fortune
OK, and to the processor the second error signal is exported.
6. system according to claim 1, it is characterised in that also including photoelectric isolating circuit；
The processor passes through the photoelectric isolating circuit and the Rotating speed measring circuit, the position detecting circuit and/or institute
State drive circuit connection.
7. system according to claim 6, it is characterised in that the tach signal includes the signal of rotating speed first and rotating speed the
Binary signal, the photoelectric isolating circuit includes the first photoelectric coupling chip and the second photoelectric coupling chip；
The signal input tube pin of the first photoelectric coupling chip is electrically connected with the signal of rotating speed first；
The signal output pin of the first photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the first photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the first photoelectric coupling chip is electrically connected with the second power supply signal line；Described first
3rd reference voltage input pin of photoelectric coupling chip is electrically connected with the second ground signal line；
The signal input tube pin of the second photoelectric coupling chip is electrically connected with the rotating speed secondary signal；
The signal output pin of the second photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the second photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the second photoelectric coupling chip is electrically connected with the second power supply signal line；Described first
3rd reference voltage input pin of photoelectric coupling chip is electrically connected with the second ground signal line.
8. system according to claim 6, it is characterised in that the position signalling includes the signal of position first and position the
Binary signal, the photoelectric isolating circuit includes the 3rd photoelectric coupling chip and the 4th photoelectric coupling chip；
The signal input tube pin of the 3rd photoelectric coupling chip is electrically connected with the signal of position first；
The signal output pin of the 3rd photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the 3rd photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the 3rd photoelectric coupling chip is electrically connected with the 3rd power supply signal line；
3rd reference voltage input pin of the 3rd photoelectric coupling chip is electrically connected with second ground signal line；
The signal input tube pin of the 4th photoelectric coupling chip is electrically connected with the position secondary signal；
The signal output pin of the 4th photoelectric coupling chip is electrically connected with the processor；
First reference voltage input pin of the 4th photoelectric coupling chip is electrically connected with the first power supply signal line；
Second reference voltage input pin of the 4th photoelectric coupling chip is electrically connected with the 3rd power supply signal line；
3rd reference voltage input pin of the 4th photoelectric coupling chip is electrically connected with second ground signal line.
9. system according to claim 6, it is characterised in that the pulse width modulating signal includes pulse width modulation
First signal and pulse width modulation secondary signal, the photoelectric isolating circuit include the 5th photoelectric coupling chip and the 6th photoelectricity
Coupling chip；
The signal input tube pin of the 5th photoelectric coupling chip is electrically connected with the signal of pulse width modulation first；
The signal output pin of the 5th photoelectric coupling chip is electrically connected with the drive circuit；
First reference voltage input pin of the 5th photoelectric coupling chip is electrically connected with second ground signal line；
Second reference voltage input pin of the 5th photoelectric coupling chip is electrically connected with the 4th power supply signal line；
3rd reference voltage input pin of the 5th photoelectric coupling chip is electrically connected with first ground signal line；
The signal input tube pin of the 6th photoelectric coupling chip is electrically connected with the pulse width modulation secondary signal；
The signal output pin of the 6th photoelectric coupling chip is electrically connected with the drive circuit；
First reference voltage input pin of the 6th photoelectric coupling chip is electrically connected with second ground signal line；
Second reference voltage input pin of the 6th photoelectric coupling chip is electrically connected with the 4th power supply signal line；
3rd reference voltage input pin of the 6th photoelectric coupling chip is electrically connected with first ground signal line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710565029.8A CN107257218A (en) | 2017-07-12 | 2017-07-12 | The drive system of direct current generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565029.8A CN107257218A (en) | 2017-07-12 | 2017-07-12 | The drive system of direct current generator |
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| CN107257218A true CN107257218A (en) | 2017-10-17 |
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| CN201710565029.8A Pending CN107257218A (en) | 2017-07-12 | 2017-07-12 | The drive system of direct current generator |
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Application publication date: 20171017 |