CN204681284U - A kind of two-phase motor frequency-changing control system based on DSP - Google Patents
A kind of two-phase motor frequency-changing control system based on DSP Download PDFInfo
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- CN204681284U CN204681284U CN201520370198.2U CN201520370198U CN204681284U CN 204681284 U CN204681284 U CN 204681284U CN 201520370198 U CN201520370198 U CN 201520370198U CN 204681284 U CN204681284 U CN 204681284U
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Abstract
The utility model discloses a kind of two-phase motor frequency-changing control system based on DSP, belong to Motor Control Field, the utility model is that the current component (torque current) stator current vector of alternating current machine under rest frame being decomposed into current component (exciting current) and the generation torque producing magnetic field is controlled respectively, and the amplitude simultaneously controlled between two components and phase place, namely stator current vector is controlled, and obtain the dynamic and static characteristic similar to Direct Current Governor System, so just achieve uneoupled control, accelerate the response speed of system.Testing circuit aspect we adopt be electric resistance partial pressure method measuring voltage, such method is simple, economical, efficient, Hall element detection method is utilized to measure electric current, such method applicability is wide, precision is higher, and the linearity is also better, and selective light photoelectric coder detects motor speed, the tach signal precision obtained like this is high, and reliability is high, antijamming capability is strong.
Description
Technical field
The utility model belongs to Motor Control Field, particularly a kind of two-phase motor frequency-changing control system based on DSP.
Background technology
Individual event asynchronous AC motor only needs single phase alternating current power supply to power, and that thus applies very is extensive, and as various fields such as electric tool, household electrical appliance, junior machine, instruments, it has, and structure is simple, with low cost, application and the feature such as easy to maintenance.Alternating current machine also can adopt two windings, these two windings are separated according to an angle of 90 degrees, phase difference is formed by an Xiangli serial capacitors wherein, produce starting torque, Here it is two-phase motor, two-phase motor compares load motor, is that torque efficiency or the speed adjusting performance of motor all will improve.
Although phase asynchronous alternating current machine has above numerous advantage, also clearly, degraded performance, energy utilization rate be low, the speed governing that can not carry out high accuracy and can not meet high-precision driving demand for shortcoming.
Utility model content
Goal of the invention of the present utility model is exactly the problems referred to above being to solve two-phase motor.A kind of two-phase motor frequency-changing control system based on DSP is proposed.
Goal of the invention of the present utility model is achieved through the following technical solutions: a kind of two-phase motor frequency-changing control system based on DSP, and it comprises power circuit, control circuit and testing circuit three parts; Power circuit comprises current rectifying and wave filtering circuit and inverter circuit, and current rectifying and wave filtering circuit is connected to inverter circuit, last incoming transport motor; Control circuit comprises microprocessor DSP and Key and display circuit, and Key and display circuit is coupled together by RS232 interface and microprocessor DSP; The PWM output of microprocessor DSP is connected to the PWM input of inverter circuit; Testing circuit comprises voltage sampling circuit, current sampling circuit and motor speed sample circuit, voltage sampling circuit one end connects the input of described inverter circuit, one end is connected to the data terminal of microprocessor DSP, after current sampling circuit is then connected with the power input of motor, access the data terminal of described microprocessor DSP, after rotating speed sample circuit is then connected with motor, the data terminal of access microprocessor DSP.
Current rectifying and wave filtering circuit comprises uncontrollable rectifier bridge, resistance R and electric capacity C1, forms low-pass filter circuit and uncontrollable rectifier bridge is connected to form described current rectifying and wave filtering circuit after resistance R is connected with electric capacity C1.
That inverter circuit adopts is the IPM Intelligent Power Module PS21563-P of high integration.
We adopt microprocessor DSP is TMS320LF2407A, and it is a kind of is specially the Digital Implementation of Electric Machine Control and 16 fixed DSPs designing.
Key and display circuit we adopt be that the shift register that SN74HC595D exports as serial input-parallel directly connects numeral method, keyboard circuit is directly connected with the I/O mouth of DSP.
Voltage detecting circuit we utilize be electric resistance partial pressure ratio juris design.
We utilize current detection circuit is the principle design of Hall element detection method.
Speed detect circuit we adopt be that incremental optical-electricity encoder is to monitor the rotating speed of motor.
The utility model is that the current component (torque current) stator current vector of alternating current machine under rest frame being decomposed into current component (exciting current) and the generation torque producing magnetic field is controlled respectively, and the amplitude simultaneously controlled between two components and phase place, namely stator current vector is controlled, and obtain the dynamic and static characteristic similar to Direct Current Governor System, so just achieve uneoupled control, accelerate the response speed of system.
Testing circuit aspect we adopt be electric resistance partial pressure method measuring voltage, such method is simple, economical, efficient, Hall element detection method is utilized to measure electric current, such method applicability is wide, precision is higher, and the linearity is also better, and selective light photoelectric coder detects motor speed, the tach signal precision obtained like this is high, and reliability is high, antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is control system entire block diagram.
Fig. 2 is power circuit schematic diagram.
Fig. 3 is Key and display circuit figure.
Fig. 4 is voltage sampling circuit figure.
Fig. 5 is current sampling circuit figure.
Fig. 6 is rotating speed sample circuit figure.
Embodiment
Here is described further embodiment of the present utility model by reference to the accompanying drawings.
As shown in Figure 1: a kind of two-phase motor frequency-changing control system based on DSP, it comprises power circuit 1, control circuit 2 and testing circuit 3 three parts; Power circuit 1 comprises current rectifying and wave filtering circuit 101 and inverter circuit 102, and current rectifying and wave filtering circuit 101 is connected to inverter circuit 102, last incoming transport motor; Control circuit 2 comprises microprocessor DSP 201 and Key and display circuit 202, and Key and display circuit 202 is coupled together by RS232 interface and microprocessor DSP 201; The PWM output of microprocessor DSP 201 is connected to the PWM input of inverter circuit 102; Testing circuit 3 comprises voltage sampling circuit 301, current sampling circuit 302 and motor speed sample circuit 303, voltage sampling circuit 301 one end connects the input of described inverter circuit 102, one end is connected to the data terminal of microprocessor DSP 201, after current sampling circuit 302 is connected with the power input of motor, access the data terminal of described microprocessor DSP 201, after rotating speed sample circuit 303 is connected with motor, the data terminal of access microprocessor DSP 201.
Current rectifying and wave filtering circuit 101 comprises uncontrollable rectifier bridge, resistance R and electric capacity C1 as shown in Figure 2, forms low-pass filter circuit and uncontrollable rectifier bridge is connected to form described current rectifying and wave filtering circuit after resistance R is connected with electric capacity C1.
That inverter circuit 102 adopts is the IPM Intelligent Power Module PS21563-P of high integration.
We adopt microprocessor DSP 201 is TMS320LF2407A, and it is a kind of is specially the Digital Implementation of Electric Machine Control and 16 fixed DSPs designing.
As shown in Figure 3: Key and display circuit 202 we adopt be that the shift register that SN74HC595D exports as serial input-parallel directly connects numeral method, keyboard circuit is directly connected with the I/O mouth of DSP.
The method detecting electric moter voltage has 3 kinds at present: electric resistance partial pressure method, voltage transformer method and Hall voltage sensor method, electric resistance partial pressure method utilizes a certain amount of resistant series to get up high pressure carried out dividing potential drop exactly, obtain scaled low-voltage, this method is the simplest, but precision is also minimum; Voltage transformer method utilizes voltage transformer to detect voltage, is generally used for the situation of large voltage, and can only detects AC signal; Hall voltage sensor method utilizes Hall effect to detect voltage, because be based on Hall closed loop Zero flux principle, so can direct voltage be measured, the voltage of alternating voltage and hybrid waveform, and precision is higher, the linearity is better, but Hall voltage transducer cost is higher, considers Cost Problems, what we adopted is electric resistance partial pressure method, as shown in Figure 4, what we adopted is electric resistance partial pressure method sampling DC bus-bar voltage to physical circuit, the DC bus-bar voltage signal after sampling
compared with LM393 comparator; produce overvoltage and under-voltage signal respectively; amplify and light-coupled isolation through triode; the fault FO signal phase exported again and by IPM with after deliver to TMS320LF2407A PDPINTA hold; when PDPINTA pin is low level signal; DSP blocks the output of PWM immediately, thus protects system.
The detection method of electric current has 3 kinds: resistance detection method, current transformer method and Hall element detection method, and resistance detection method is generally applicable in low-voltage small area analysis circuit, and precision is lower; Current transformer method utilizes current transformer to detect electric current, is generally used for large voltage high-current, and can only detects AC signal; Hall element detection method utilizes Hall effect to detect electric current, interchange can be detected and also can detect direct current signal, and precision is higher, the linearity is better, so we adopt be Hall element detection method, physical circuit figure as shown in Figure 5, what we adopted is ACS704ELC-05 current sensor, sample rate current is from 1, the 2 pin inputs of ACS704ELC-05, sampled voltage is exported from 7 pin, after integrated operational amplifier and amplitude limiter circuit, reach the AD interface of DSP, the current detection circuit of another phase is identical with it.
The quality of rotating speed sample circuit is directly connected to the precision of whole governing system, in order to detect the rotating speed of motor more accurately, we select incremental optical-electricity encoder to monitor the rotating speed of motor, owing to being integrated with quadrature coding pulse circuit QEP in TMS320LF2407A, can with incremental optical-electricity encoder with the use of, receive the quadrature coding pulse signal that incremental optical-electricity encoder sends, the rotating speed that motor is current and rotation direction just can be detected by detecting quadrature coding pulse signal, physical circuit figure as shown in Figure 6, we are by A, B signal is sent into light-coupled isolation chip HCPL4504 again and is isolated after telling cmos device MC74HC14AD to carry out shaping, prevent the electromagnetic interference of circuit, finally be sent to QEP3 and the QEP4 port of orthogonal encoder.
The above; it is only preferred embodiment of the present utility model; not do any type of restriction to the utility model, those skilled in the art utilizes the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drops in protection range of the present utility model.
Claims (8)
1. based on a two-phase motor frequency-changing control system of DSP, it comprises power circuit, control circuit and testing circuit three parts; It is characterized in that: described power circuit comprises current rectifying and wave filtering circuit and inverter circuit, described current rectifying and wave filtering circuit is connected to described inverter circuit, last incoming transport motor; Described control circuit comprises microprocessor DSP and Key and display circuit, and described Key and display circuit is coupled together by RS232 interface and described microprocessor DSP; The PWM output of described microprocessor DSP is connected to the PWM input of described inverter circuit; Described testing circuit comprises voltage sampling circuit, current sampling circuit and motor speed sample circuit, described voltage sampling circuit one end connects the input of described power circuit, one end is connected to the data terminal of described microprocessor DSP, after described current sampling circuit is then connected with the power input of motor, access the data terminal of described microprocessor DSP, after described rotating speed sample circuit is then connected with motor, access the data terminal of described microprocessor DSP.
2. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, it is characterized in that: described current rectifying and wave filtering circuit comprises uncontrollable rectifier bridge, resistance R and electric capacity C1, after described resistance R is connected with described electric capacity C1, form low-pass filter circuit and described uncontrollable rectifier bridge is connected to form described current rectifying and wave filtering circuit.
3. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, is characterized in that: described inverter circuit adopts the IPM Intelligent Power Module PS21563-P of high integration.
4. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, is characterized in that: described microprocessor DSP adopts TMS320LF2407A, and it is a kind of is the Digital Implementation of Electric Machine Control and 16 fixed DSPs designing specially.
5. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, it is characterized in that: the shift register that described Key and display circuit adopts SN74HC595D to export as serial input-parallel directly connects numeral method, and keyboard circuit is directly connected with the I/O mouth of DSP.
6. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, is characterized in that: described voltage detecting circuit utilizes electric resistance partial pressure ratio juris to design.
7. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, is characterized in that: described current detection circuit is the principle design utilizing Hall element detection method.
8. a kind of two-phase motor frequency-changing control system based on DSP according to claim 1, is characterized in that: described speed detect circuit adopts incremental optical-electricity encoder to monitor the rotating speed of motor.
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| CN201520370198.2U CN204681284U (en) | 2015-06-02 | 2015-06-02 | A kind of two-phase motor frequency-changing control system based on DSP |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954576A (en) * | 2016-06-20 | 2016-09-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Input power calculation circuit of motor |
| CN106941334A (en) * | 2016-01-04 | 2017-07-11 | 江苏煌明能源科技有限公司 | A kind of treadmill ac three-phase asynchronous motor speed-adjusting and control system |
-
2015
- 2015-06-02 CN CN201520370198.2U patent/CN204681284U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941334A (en) * | 2016-01-04 | 2017-07-11 | 江苏煌明能源科技有限公司 | A kind of treadmill ac three-phase asynchronous motor speed-adjusting and control system |
| CN105954576A (en) * | 2016-06-20 | 2016-09-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Input power calculation circuit of motor |
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