CN203057054U - Motor, controller of motor and speed regulating circuit of same - Google Patents
Motor, controller of motor and speed regulating circuit of same Download PDFInfo
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- CN203057054U CN203057054U CN2012206847304U CN201220684730U CN203057054U CN 203057054 U CN203057054 U CN 203057054U CN 2012206847304 U CN2012206847304 U CN 2012206847304U CN 201220684730 U CN201220684730 U CN 201220684730U CN 203057054 U CN203057054 U CN 203057054U
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Abstract
The utility model provides a motor, a controller of the motor and a speed regulating circuit of the same. The speed regulating circuit includes an input terminal, an output terminal and a switch type photoelectric coupler, wherein a switch device is connected between an input end of a light-emitting diode of the switch type photoelectric coupler and the input terminal, and an output end of a photoelectric triode of the switch type photoelectric coupler is connected with the output terminal. The controller comprises a control module, a power driving circuit which receives output signals of the control module, and a signal feedback circuit which outputs rotating-speed feedback signals to the control module, wherein the control module includes the speed regulating circuit and a control chip. The motor includes a stator, a rotor and said controller. According to the utility model, high synchronization of output signals and input signals of the speed regulating circuit can be ensured, which is helpful for controlling the motor.
Description
Technical field
The utility model relates to machine field, especially relates to the controller of a kind of dc brushless motor and this motor, the alignment circuit of controller.
Background technology
Brshless DC motor possesses the advantage of continuous speed adjustment because of it, more and more is subjected to people's favor, has been widely used in the various electric equipments.Brshless DC motor has stator and can be with respect to the stator rotor rotated, and stator and rotor have constituted the motor body of motor.Motor also is provided with the controller and the position detecting circuit that are used for the work of control motor body, and the structured flowchart of motor as shown in Figure 1.
Controller 10 has control module 11, control module 11 comprises alignment circuit 13 and control chip 12, control chip 12 normally single-chip microcomputer, DSP, Electric Machine Control special chip etc. can externally be exported the device of control signal, it receives the signal of alignment circuit 13 inputs, and according to the signal production burst modulation signal that receives, be pwm signal, and export the pwm signal that generates to power driving circuit 16.
Alignment circuit 13 receives the control signal of outside input, and a kind of common structure of alignment circuit 13 as shown in Figure 2.Alignment circuit 13 has swept resistance R1, resistance R 2 and capacitor C 1, the end of swept resistance R1 is connected with input terminal IN, receive the signal that is used for the control motor speed of peripheral control unit input, centre tap is connected with lead-out terminal OUT by resistance R 2, and the centre tap of swept resistance R1 is also by capacitor C 1 ground connection, and capacitor C 1 is used for the signal of swept resistance R1 output is carried out filtering.
The signal of peripheral control unit input is generally continuously adjustable analog voltage signal, export the AD conversion port of control chip 12 after the signal process swept resistance R1 of input and the resistance R 2 to, be converted to corresponding digital signal by control chip 12, and generate corresponding pwm signal according to this digital signal, export power driving circuit 16 to.
The another kind of common structure of alignment circuit 13 as shown in Figure 3.Alignment circuit 13 has resistance R 3, resistance R 4, resistance R 5, switching device Q1 and precision photoelectric coupler TLP.One end of resistance R 4 is connected with input terminal VCC, 5V d. c. voltage signal normally, the input of the light-emitting diode D1 of the other end wiring photoelectrical coupler TLP of resistance R 4.Be connected with triode Q1 between another input of the light-emitting diode D1 of precision photoelectric coupler TLP and the input terminal, the base stage of triode Q1 receives the pwm signal that is used for the control motor speed of peripheral control unit input.One of the phototriode Q2 of precision photoelectric coupler TLP input termination DC power supply VCC, 5V d. c. voltage signal normally, another output of phototriode Q2 links to each other with lead-out terminal.The signal of precision photoelectric coupler TLP input is the digital PWM signal, and output is the analog voltage signal of a continuous variable.
Power driving circuit 16 has a plurality of controlled field effect transistor, each field effect transistor can be under the control of pwm signal break-make, and to motor body M output drive signal, drive motors work, and drive armature spindle rotation, outwards outputting power by rotor.Certainly, power driving circuit 16 is also to the signal of control chip 12 output feedback, and control chip 12 is judged the operating state of each field effect transistor in the power driving circuit 16 according to the signal of feedback, comprises that field effect transistor is whether overheated etc.
Position detecting circuit 15 has Hall element and magnetism encoder, photoelectric encoder etc. usually, position for detection of rotor, and form corresponding signal and export speed feedback signal circuit 14 to, signal feedback circuit 14 exports the speed feedback signal of rotor to control chip 12, control chip 12 is judged the current position of rotor according to speed feedback signal, and regulates to the signal of power driving circuit 16 outputs according to the current position of rotor.
But, the control of brshless DC motor need cooperate the load of motor to regulate, when the alignment circuit that adopts Fig. 2 carries out speed governing, input signal is analog voltage signal, need to convert corresponding digital quantity to through AD converter, because analog signal accuracy is lower, the digital quantity difference that is converted to is bigger, can't realize the accurate control to motor.If adopt the circuit speed governing of Fig. 3 precision photoelectric coupler TLP, input is pwm signal, but through the voltage signal that remains simulation that obtains after the precision photoelectric coupler TLP processing, and because the performance limitations of precision photoelectric coupler TLP, in some zone, the analog voltage signal of output can not be linear change thereupon when input PWM signal changes, the input and output signal synchronism is relatively poor, the signal of its output often can not change with the linear change of input signal, also influences the control to motor.
Summary of the invention
Main purpose of the present utility model provides a kind of input signal linearity of following and changes the alignment circuit of electric machine controller preferably.
Another purpose of the present utility model provides a kind ofly controls electric machine controller preferably to motor body.
A destination more of the present utility model provides a kind of motor that is easy to control.
For realizing main purpose of the present utility model, the alignment circuit of the electric machine controller that the utility model provides comprises input terminal and lead-out terminal, also comprise the switching mode photoelectrical coupler, be connected with switching device between input of the light-emitting diode of switching mode photoelectrical coupler and the input terminal, an output of the phototriode of switching mode photoelectrical coupler is connected with lead-out terminal.
By such scheme as seen, alignment circuit is coupled to lead-out terminal by the switching mode photoelectrical coupler with the pwm signal of importing, the signal of lead-out terminal output also is pwm signal, and output signal and input signal keep the synchronism of height, be that output signal can be followed input signal and changed linearly, be conducive to control chip to the control of motor.
A preferred scheme is that switching device is triode or field effect transistor, and the control end of triode or field effect transistor is connected with input terminal.
This shows, the pwm signal control triode of peripheral control unit input or the break-make of field effect transistor, thereby the break-make of the light-emitting diode of control switch type photoelectrical coupler, thereby guarantee that the light-emitting diode of switching mode photoelectrical coupler and input signal keep the synchronous of height.
For realizing another purpose of the present utility model, the electric machine controller that the utility model provides comprises control module and the power driving circuit that receives the control module output signal, controller also has to the signal feedback circuit of control module output speed feedback signal, control module has alignment circuit and control chip, alignment circuit has input terminal and lead-out terminal, also comprise the switching mode photoelectrical coupler, be connected with switching device between input of the light-emitting diode of switching mode photoelectrical coupler and the input terminal, an output of the phototriode of switching mode photoelectrical coupler is connected with lead-out terminal.
By such scheme as seen, alignment circuit adopts the switching mode photoelectrical coupler that input signal is coupled to output, guarantees that the signal of output is synchronous with the signal of input, and the signal of exporting is pwm signal also, is conducive to controller to the control of motor body.
A preferred scheme is, the lead-out terminal of alignment circuit is connected with a pin of control chip, and signal feedback circuit is connected to the same pin of control chip, and the pin of control chip is to the internal counter output signal of control chip.
This shows, the signal of alignment circuit and signal feedback circuit exports the same pin of control chip simultaneously to, and simultaneously to counter output signal, by same counter speed feedback signal and rotary speed regulating signal are counted, guarantee the accuracy counted, also be conducive to realize the control to motor body.
For realizing an above-mentioned purpose again, the motor that the utility model provides comprises stator and rotor, and be provided with controller, the power driving circuit that controller has control module and receives the control module output signal, controller also has to the signal feedback circuit of control module output speed feedback signal, control module has alignment circuit and control chip, alignment circuit has input terminal and lead-out terminal, also comprise the switching mode photoelectrical coupler, be connected with switching device between input of the light-emitting diode of switching mode photoelectrical coupler and the input terminal, an output of the phototriode of switching mode photoelectrical coupler is connected with lead-out terminal.
By such scheme as seen, the alignment circuit of controller arranges the switching mode photoelectrical coupler input signal is coupled, and can guarantee the signal of alignment circuit output and the synchronism of input signal, is conducive to the control to motor body.
Description of drawings
Fig. 1 is the electric theory diagram of existing motor.
Fig. 2 is the electrical schematic diagram of alignment circuit in the existing electric machine controller.
Fig. 3 is the electrical schematic diagram of another kind of alignment circuit in the existing electric machine controller.
Fig. 4 is the electrical schematic diagram of the utility model alignment circuit.
Fig. 5 is the oscillogram of the utility model electric machine controller embodiment medium speed feedback signal and rotary speed regulating signal.
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
The motor of present embodiment has a housing, and stator and rotor are installed in housing, but rotor relative stator rotation, and the middle part of rotor is equipped with armature spindle, armature spindle rotates under the rotation of rotor, and outside outputting power.Stator and rotor constitute motor body.
Also be provided with controller and position detecting circuit for the control machine operation on motor, controller has control module, power driving circuit and signal feedback circuit.Wherein control module comprises alignment circuit and control chip, control chip is devices such as single-chip microcomputer, DSP or Electric Machine Control special chip, power driving circuit has a plurality of field effect transistor, the conducting or end under the signal controlling of control module output of each field effect transistor.
Position detecting circuit comprises Hall element and photoelectric encoder or the magnetism encoder etc. that are arranged on the motor body, position signalling for detection of rotor, and the position signalling that detects is sent to signal feedback circuit, signal feedback circuit exports the speed feedback signal that position signalling converts rotor to control chip.
Referring to Fig. 4, the alignment circuit of present embodiment has input terminal IN and lead-out terminal OUT, and switching mode photoelectrical coupler TLP1 is set, switching mode photoelectrical coupler TLP1 comprises light-emitting diode D11 and phototriode Q12, the anode of light-emitting diode D11 is connected with DC power supply VCC by resistance R 14, receive low-voltage DC, as 5 volts of DC power supply, the negative electrode of light-emitting diode D11 is connected with input terminal IN by the triode Q11 as switching device.The base stage of triode Q11, just its control end is connected with input terminal IN, and collector electrode is connected to the negative electrode of light-emitting diode D11, grounded emitter.
The end of phototriode Q12 is connected to DC power supply VCC, receives low-voltage DC, and as 5 volts of DC power supply, the other end is connected to lead-out terminal OUT as output.And lead-out terminal OUT is by resistance R 15 ground connection, to guarantee the voltage of lead-out terminal OUT output.
Lead-out terminal OUT is connected on the pin of control chip, to this pin output speed conditioning signal.And the output of signal feedback circuit also is connected on the same pin of control chip, and to control chip output speed feedback signal, namely rotor conditioning signal and speed feedback signal all export on the same pin of control chip.And the pin of control chip also is connected to its internal counter, to inner counter output signal.
Because what the input terminal IN of alignment circuit received is pwm signal, when signal is high level, triode Q11 conducting, light-emitting diode D11 is luminous, phototriode Q12 conducting is immediately also exported high level signal, and the signal of lead-out terminal OUT output is high level signal.When the pwm signal of input terminal IN was low level signal, triode Q11 ended, and light-emitting diode D11 is not luminous, and phototriode Q12 ends, lead-out terminal OUT output low level signal.As seen, the signal of the signal of lead-out terminal OUT output and input terminal IN input keeps synchronously, and the signal of alignment circuit output also is pwm signal.
Therefore, control chip can be regulated motor according to the pwm signal of alignment circuit output, specifically is by calculating the width of high level in the pwm signal, realizing the adjusting to motor speed.
Referring to Fig. 5, the oscillogram of the top is the speed feedback signal that signal feedback circuit outputs to control chip, signal is rising edge at a1 constantly, namely become high level from low transition, be trailing edge constantly at a2, namely convert low level to from high level, a3 is rising edge constantly, becomes high level from low transition.The control chip internal counter will be preserved count value at speed feedback signal each rising edge or falling edge, and the zero clearing counter, begin simultaneously to count next time, and the count cycle is determined by the counter setpoint frequency.
If alignment circuit is rising edge to the signal of control chip output at b1 constantly, be trailing edge constantly at b2, because b1 is positioned at the low level count cycle of speed feedback signal constantly, and b2 is positioned at the high level count cycle of speed feedback signal constantly, and b1 count value constantly is greater than b2 count value constantly, therefore b2 moment count value deducts b1 moment count value less than zero, and control chip judges that result of calculation is invalid, gives up this data.
If alignment circuit is rising edge to the signal of control chip output at c1 constantly, be trailing edge constantly at c2, because c1 all is positioned at the high level count cycle of speed feedback signal constantly constantly with c2, and c2 count value constantly is greater than c1 count value constantly, therefore c2 moment count value deducts c1 moment count value greater than zero, control chip judges that result of calculation is effective, preserves this result of calculation.
If alignment circuit is rising edge to the signal of control chip output at d1 constantly, be trailing edge constantly at d2, because d1 is positioned at the high level count cycle of speed feedback signal constantly, and d2 is positioned at the low level count cycle of speed feedback signal constantly, and d1 count value constantly is greater than d2 count value constantly, therefore d2 moment count value deducts d1 moment count value less than zero, and control chip 12 judges that result of calculations are invalid, gives up this data.
If alignment circuit is rising edge to the signal of control chip output at e1 constantly, be trailing edge constantly at e2, because e1 all is positioned at the low level count cycle of speed feedback signal constantly constantly with e2, and c2 count value constantly is greater than c1 count value constantly, therefore c2 moment count value deducts c1 moment count value greater than zero, control chip judges that result of calculation is effective, preserves this result of calculation.
Like this, as long as know the high level count value of speed-regulating signal and the count cycle of control chip internal counter, can calculate the high impulse length of rotary speed regulating signal easily, thereby easily motor be controlled.
As seen, alignment circuit outputs to control chip by switching mode photoelectrical coupler TLP1 with the pwm signal coupling of importing, and makes the signal of output and the signal of input keep synchronism highly, and the linearity is better, is conducive to the control of motor.
It is emphasized that at last; the utility model is not limited to above-mentioned execution mode, also should be included in the protection range of the utility model claim as switching device, the variations such as switching mode photoelectrical coupler type change of selecting for use as using field effect transistor to substitute triode.
Claims (10)
1. the alignment circuit of electric machine controller comprises
Input terminal and lead-out terminal;
It is characterized in that:
The switching mode photoelectrical coupler is connected with switching device between an input of the light-emitting diode of described switching mode photoelectrical coupler and the described input terminal, and an output of the phototriode of described switching mode photoelectrical coupler is connected with described lead-out terminal.
2. the alignment circuit of electric machine controller according to claim 1 is characterized in that:
Described switching device is triode or field effect transistor, and the control end of described triode or described field effect transistor is connected with described input terminal.
3. electric machine controller comprises
Control module and the power driving circuit that receives described control module output signal, described controller also has to the signal feedback circuit of described control module output speed feedback signal, described control module has alignment circuit and control chip, the lead-out terminal that described alignment circuit has input terminal and is connected with described control chip;
It is characterized in that:
Described alignment circuit also has the switching mode photoelectrical coupler, be connected with switching device between an input of the light-emitting diode of described switching mode photoelectrical coupler and the described input terminal, an output of the phototriode of described switching mode photoelectrical coupler is connected with described lead-out terminal.
4. electric machine controller according to claim 3 is characterized in that:
Described switching device is triode or field effect transistor, and the control end of described triode or described field effect transistor is connected with described input terminal.
5. according to claim 3 or 4 described electric machine controllers, it is characterized in that:
Described lead-out terminal is connected with a pin of described control chip, and described signal feedback circuit is connected to the same pin of described control chip.
6. electric machine controller according to claim 5 is characterized in that:
The described pin of described control chip is to the internal counter output signal of described control chip.
7. motor comprises
Stator and rotor, and be provided with controller, described controller has
Control module and the power driving circuit that receives described control module output signal, described controller also has to the signal feedback circuit of described control module output speed feedback signal, described control module has alignment circuit and control chip, the lead-out terminal that described alignment circuit has input terminal and is connected with described control chip;
It is characterized in that:
Described alignment circuit also has the switching mode photoelectrical coupler, be connected with switching device between an input of the light-emitting diode of described switching mode photoelectrical coupler and the described input terminal, an output of the phototriode of described switching mode photoelectrical coupler is connected with described lead-out terminal.
8. motor according to claim 7 is characterized in that:
Described switching device is triode or field effect transistor, and the control end of described triode or described field effect transistor is connected with described input terminal.
9. according to claim 7 or 8 described motors, it is characterized in that:
Described lead-out terminal is connected with a pin of described control chip, and described signal feedback circuit is connected to the same pin of described control chip.
10. motor according to claim 9 is characterized in that:
The described pin of described control chip is to the internal counter output signal of described control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206847304U CN203057054U (en) | 2012-12-12 | 2012-12-12 | Motor, controller of motor and speed regulating circuit of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206847304U CN203057054U (en) | 2012-12-12 | 2012-12-12 | Motor, controller of motor and speed regulating circuit of same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057054U true CN203057054U (en) | 2013-07-10 |
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ID=48739970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206847304U Expired - Fee Related CN203057054U (en) | 2012-12-12 | 2012-12-12 | Motor, controller of motor and speed regulating circuit of same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057054U (en) |
-
2012
- 2012-12-12 CN CN2012206847304U patent/CN203057054U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20211212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |