CN201636414U - Device for microstep adjustment of valve by using permanent magnet synchronous motor - Google Patents
Device for microstep adjustment of valve by using permanent magnet synchronous motor Download PDFInfo
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- CN201636414U CN201636414U CN2009203512383U CN200920351238U CN201636414U CN 201636414 U CN201636414 U CN 201636414U CN 2009203512383 U CN2009203512383 U CN 2009203512383U CN 200920351238 U CN200920351238 U CN 200920351238U CN 201636414 U CN201636414 U CN 201636414U
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Abstract
The utility model relates to a device for microstep adjustment of a valve by using a permanent magnet synchronous motor. The device mainly comprises the permanent magnet synchronous motor, an electric valve controller, a speed reducer and the valve, wherein the shaft of the permanent magnet synchronous motor is connected with the speed reducer through a flange; the speed reducer is connected with the valve through another flange; and the electric valve controller comprises a DSP(digital signal processor) control part and a driving power amplification part of the controller, and is connected with the speed reducer and the permanent magnet synchronous motor at the same time. Compared with the prior art, the device adopts the permanent magnet synchronous motor as a power source motor, takes the stator current of the permanent magnet synchronous motor as a direct controlled object, and utilizes the all-digital controller to realize the accurate positioning of a valve electric device and to guarantee the response rapidity; in virtue of the micro-step operation characteristic of the permanent magnet synchronous motor, complicated mechanical transmission devices are left out; and via the output of the motor shaft, the device directly replaces the multi-stage complicated system in the prior art with simple decelerated transmission to realize the microstep adjustment and the positioning of the valve; and besides, the device has the advantages of simple structure, rapid response, strong pollution-resistance capability and high reliability.
Description
Technical field:
The utility model relates to a kind of permagnetic synchronous motor that utilizes and carries out the device that valve micro-step is regulated.
Technical background:
Electric valve is a modern industry automation part and parcel, at fluid control industry electric valve important effect is arranged, and because of its power source is obtained easily, uses more general compared with the equipment of different driving mode such as pneumatic, as to surge.Nowadays along with the development of industrial automation, under the valve energy guaranteed performance and the situation in life-span, the Security of electric valve and reliability depend on the actuator of electric valve, so the performance of actuator, controlling level are the general performances of electric valve its technical level.The more important thing is: in the process of the design of electric valve, type selecting if only pay attention to the parameter of valve, ignore or do not have the related request of clear and definite actuator, not only make electric valve can not bring into play best performance, and in installation, debugging, using process, also can bring unnecessary trouble, even cause serious consequence to production.
China's electric valve is started late, a little less than the basic relative thin, the product that domestic research and development are produced require highi degree of accuracy, reliability high aspect need wait to improve.The driving mechanism part of the actuator of most electric valves is complicated, is not easy to install, debugging, and easy-maintaining not.
Summary of the invention:
The utility model provides a kind of permagnetic synchronous motor that utilizes to carry out the device that valve micro-step is regulated, adopt the power source motor of permagnetic synchronous motor as electric valve, stator current with permagnetic synchronous motor is direct controlling object, the motion control pattern of analog stepping motor, obtain small motor Location accuracy, replace the multistage complex transmission of prior art to realize the fine setting of valve with easy gear transmission.The utility model is electric valve motor, electric valve controller, valve three-in-one device, can not only stablize the accurate micro-stepping control of realization to valve, also has advantage simple in structure, that response is fast, contamination resistance is strong, reliability is high.
The device that utilizes permagnetic synchronous motor to carry out the valve micro-step adjusting that the utility model provides mainly comprises: permagnetic synchronous motor, electric valve controller, retarder, valve; The permagnetic synchronous motor axle is by the flange connection reducer, and retarder connects valve by flange; Electric valve controller is made up of DSP control section and driving power enlarged portion; The electric valve controller connection reducer, electric valve controller connects permagnetic synchronous motor simultaneously.
Described driving power enlarged portion comprises drive circuit, signal isolation drive power supply, voltage sampling circuit, current sample, protective circuit.Protective circuit comprises braking protective circuit, overvoltage crowbar, under-voltage protecting circuit.
Described signal isolated drive circuit connects dsp chip; The signal isolated drive circuit connects drive circuit (IPM).
Described voltage sampling circuit connects drive circuit, and voltage sampling circuit connects DSP simultaneously.
Described current sample uses Hall current sensor, and motor windings is passed Hall current sensor.
Described protective circuit comprises braking circuit, overvoltage circuit, under-voltage circuit.Braking circuit, overvoltage circuit, under-voltage circuit are connected to form protective circuit successively.
Described DSP control section comprises dsp chip, the DSP peripheral circuit, and the testing circuit of current signal, position detecting circuit shows and the button drive circuit.
Described DSP peripheral circuit is the chip external memory that connects user's expansion by the external memory interface module EMIF of dsp chip; And the jtag interface that passes through dsp chip connects external emulator.
The testing circuit of described current signal is that Hall current sensor connects resistance, is connected to the A/D ALT-CH alternate channel of DSP again with motor windings process Hall current sensor.
Described position detecting circuit comprises rotary transformer, function generator, high frequency power amplification chip, quantizer.
Described permagnetic synchronous motor connects rotary transformer as position transducer; Function generator is connected to high frequency power and amplifies chip; High frequency power is amplified chip connection rotary transformer provides excitation for it; It is the digital type angle value with the signal conversion that rotary transformer produces that quantizer connects rotary transformer.
Described dsp chip connects control LED nixie tube display unit by the SPI interface.
Described dsp chip detects pin by the I/O port as button and connects the keyboard input unit.
The step that a kind of implementation method of utilizing permagnetic synchronous motor to carry out the valve micro-step adjusting provided by the invention comprises:
Stator current with permagnetic synchronous motor is direct controlling object, motor adopts current phasor incremental motion pattern, and the motion control pattern of analog stepping motor is discrete with current phasor, advancing in the position of rotor follow current vector, obtains small motor Location accuracy with this; According to the requirement of user to the valve fine setting, the step number and the step pitch of electric current discretization is set, connect single reduction gear for motor on this basis; Single reduction gear connects valve, forms the electric valve device that highi degree of accuracy simple in structure, superior performance is finely tuned.
It is staircase waveform that the step pitches such as sine-wave current that feed the permagnetic synchronous motor winding are dispersed;
The stray currents vector that motor windings feeds is the staircase waveform that the one-period of electric current is divided into b part, and b is 6 multiple.
The concrete value of b is according to the number of poles of used permagnetic synchronous motor and user the fine motion required precision of valve to be chosen, and the accessible precision of the per step fine motion of permagnetic synchronous motor is: 360 °/(the motor number of pole-pairs * b).With the four-pole permanent magnet synchronous machine is example, and getting b is 12 o'clock, and the precision that per step of motor fine motion reaches is 15 °; B is 24 o'clock, and the precision that per step of motor fine motion reaches is 7.5 °.
Stator current is:
X represents the step number in the micro-step movement, is the arbitrary integer between 0 to b-1; When x gets zero, be that motor begins the initial stator current value of micro-step movement.The every micro-step movement of motor once, the electric current in the formula just changes once.By moving the given of step number x, realize the micro-stepping operation of motor.
Add the control of Current Vector Control device realization in the controller of electric device for valve, make rotor always follow the position of stator current vector, form the motion control of micro-stepping stator current.The control system structured flowchart as shown in Figure 1.
The motor shaft connection reducer of permagnetic synchronous motor, the retarder output terminal connects valve, realizes electric valve device micro-stepping regulatory function.
The permagnetic synchronous motor that utilizes provided by the invention carries out device that valve micro-step regulates and its implementation compared with prior art, adopt permagnetic synchronous motor as power source motor, stator current with motor is direct controlling object, make per step operation of motor can realize the fine adjustments action, and utilize total digital controller to realize the accurate Location accuracy of electric device for valve, guaranteed the rapidity that responds; The micro-stepping acting characteristic of this motor has been saved the complicated mechanical transmission device, directly just can replace the fine setting and the location of the multistage complex transmission realization valve of prior art with easy gearing down via motor shaft output.Actual motion shows, but micro-stepping provided by the invention adjusting electric valve device has advantage simple in structure, that response is fast, contamination resistance is strong, reliability is high.
Description of drawings
Fig. 1 is a permanent-magnetic synchronous motor stator current oriention control system structural drawing.
Fig. 2 is based on the micro-stepping of permagnetic synchronous motor and regulates electric valve device.
Fig. 3 is an electric valve device control system structured flowchart.
Specific embodiments
As shown in Figure 2, the utility model provides regulates electric valve device based on the micro-stepping of permagnetic synchronous motor and mainly comprises: permagnetic synchronous motor 1, controller 2, retarder 3, valve 4, flange 5.
Permagnetic synchronous motor 1 is by flange 5 connection reducers 2, and retarder 2 connects valve 4 by flange 5; Electric valve controller 2 is made up of DSP control section and driving power enlarged portion; Electric valve controller 2 connection reducers 3, electric valve controller 2 connects permagnetic synchronous motor 1 simultaneously.
Controller is made up of DSP control section and driving power enlarged portion.The control system structure as shown in Figure 3.
The driving power enlarged portion comprises drive circuit, signal isolated drive circuit, voltage sampling circuit, current sample, protective circuit.
DSP connects the signal isolated drive circuit; The signal isolated drive circuit connects drive circuit (IPM), and the on state of switching signal decision motor windings is provided for drive circuit.
Voltage sampling circuit connects drive circuit, and voltage sampling circuit connects DSP simultaneously.
Current sample uses Hall current sensor, and motor windings is passed Hall current sensor.
Protective circuit comprises braking circuit, overvoltage circuit, under-voltage circuit.Braking circuit, overvoltage circuit, under-voltage circuit are connected to form protective circuit successively.
The DSP control section comprises DSP (TMS320F240, TI company), the DSP peripheral circuit, and the testing circuit of current signal, position detecting circuit shows and the button drive circuit.
The DSP peripheral circuit is the chip external memory that connects user's expansion by the external memory interface module EMIF of DSP; Jtag interface by DSP connects external emulator.
The testing circuit of current signal is that Hall current sensor connects resistance, is connected to the A/D ALT-CH alternate channel of DSP again with motor windings process Hall current sensor.
Position detecting circuit comprise rotary transformer, function generator (ICL8083, Intersil), high frequency power amplifies chip (OPA547), quantizer (AD2S90).
Permagnetic synchronous motor adopts rotary transformer as position transducer; Function generator produces sinusoidal signal and is connected to high frequency power amplification chip; High frequency power is amplified chip output sinusoidal signal connection rotary transformer provides excitation for it; It is the digital type angle value with the signal conversion that rotary transformer produces that quantizer connects rotary transformer, and quantizer connects DSP again.DSP obtains rotor-position according to detection, by the Current Vector Control device trigger signal of drive circuit is controlled, and regulates each phase winding electric current.
DSP connects control LED nixie tube (MAX7219, MAXIM) display unit by the SPI interface.
DSP detects pin by the I/O port as button and connects the keyboard input unit.
The step that the implementation method of utilizing permagnetic synchronous motor to carry out the valve micro-step adjusting comprises:
Stator current with permagnetic synchronous motor is direct controlling object, motor adopts current phasor incremental motion pattern, and the motion control pattern of analog stepping motor is discrete with current phasor, advancing in the position of rotor follow current vector, obtains small motor Location accuracy with this; According to the requirement of user to the valve fine setting, the step number and the step pitch of electric current discretization is set, connect single reduction gear for motor on this basis; Single reduction gear connects valve, realizes electric valve device micro-stepping regulatory function.
It is staircase waveform that the step pitches such as sine-wave current that feed the permagnetic synchronous motor winding are dispersed; The stray currents vector that motor windings feeds is the staircase waveform that the one-period of electric current is divided into b part, and b is 6 multiple.
The concrete value of b is according to the number of poles of used permagnetic synchronous motor and user the fine motion required precision of valve to be chosen, and the accessible precision of the per step fine motion of permagnetic synchronous motor is: 360 °/(the motor number of pole-pairs * b).With the four-pole permanent magnet synchronous machine is example, and getting b is 12 o'clock, and the precision that per step of motor fine motion reaches is 15 °; B is 24 o'clock, and the precision that per step of motor fine motion reaches is 7.5 °.
Stator current is:
X represents the step number in the micro-step movement, is the arbitrary integer between 0 to b-1; When x gets zero, be that motor begins the initial stator current value of micro-step movement.The every micro-step movement of motor once, the electric current in the formula just changes once.By moving the given of step number x, realize the micro-stepping operation of motor.
Add the control of Current Vector Control device realization in the controller of electric device for valve, make rotor always follow the position of stator current vector, form the motion control of micro-stepping stator current.
The motor shaft connection reducer of permagnetic synchronous motor, the retarder output terminal connects valve, realizes electric valve device micro-stepping regulatory function; Permagnetic synchronous motor is controlled by electric valve controller; Electric valve controller is made up of DSP control section and driving power enlarged portion.The driving power enlarged portion comprises drive circuit, signal isolated drive circuit, voltage sampling circuit, current sample, protective circuit.The DSP control section comprises DSP (TMS320F240, TI company), the DSP peripheral circuit, and the testing circuit of current signal, position detecting circuit shows and the button drive circuit.
DSP sends pwm pulse signal, with pwm signal input signal isolated drive circuit; The signal isolated drive circuit connects drive circuit (IPM), and the on state of switching signal decision motor windings is provided for drive circuit.Simultaneously, break down as drive circuit, trouble signal will be sent to DSP by the signal isolation drive, and DSP detects trouble signal and in time interrupts the motor windings electric current.
Protective circuit comprises braking circuit, overvoltage circuit, under-voltage circuit.Braking circuit, overvoltage circuit, under-voltage circuit are connected to form protective circuit successively.Braking circuit consumes the energy of motor feedback on braking resistor; Overvoltage circuit is to stop inverter output when the VDC of direct-flow intermediate circuit surpasses the overvoltage specified value, avoids burning of components and parts; Under-voltage circuit quits work system when brownout phenomenon more than the stipulated time appears in the VDC that detects direct-flow intermediate circuit, avoids occurring the misoperation that causes because of the control circuit undertension.
Voltage sampling circuit connects drive circuit, and voltage sampling circuit connects DSP simultaneously.Its effect is that the drive circuit neutral voltage is sampled, and with overvoltage or under-voltage signal input DSP, as detects overvoltage or under-voltage signal sends brake signal, and the input signal isolated drive circuit in time turn-offs the motor windings electric current.Current sample uses Hall current sensor, and motor windings is passed Hall current sensor.
The DSP peripheral circuit connects the chip external memory of user's expansion by the external memory interface module EMIF of DSP; Jtag interface by DSP connects external emulator.
The testing circuit of current signal is with motor windings electric current process Hall current sensor, connects resistance and is converted to voltage signal, inputs to the A/D ALT-CH alternate channel of DSP, the maintenance of sampling.
Position detecting circuit comprise rotary transformer, function generator (ICL8083, Intersil), high frequency power amplifies chip (OPA547), quantizer (AD2S90).
Permagnetic synchronous motor adopts rotary transformer as position transducer; Function generator produces sinusoidal signal and is connected to high frequency power amplification chip; High frequency power is amplified chip output sinusoidal signal connection rotary transformer provides excitation for it; It is the digital type angle value with the signal conversion that rotary transformer produces that quantizer connects rotary transformer, and quantizer connects DSP again.DSP obtains rotor-position according to detection, by the Current Vector Control device trigger signal of drive circuit is controlled, and regulates each phase winding electric current.
DSP connects control LED nixie tube (MAX7219, MAXIM) display unit by the SPI interface.
DSP detects pin by the I/O port as button and connects the keyboard input unit.
Claims (6)
1. one kind is utilized permagnetic synchronous motor to carry out the device that valve micro-step is regulated, and it is characterized in that it mainly comprises: permagnetic synchronous motor, electric valve controller, retarder, valve; The permagnetic synchronous motor axle is by the flange connection reducer, and retarder connects valve by flange; Electric valve controller is made up of controller DSP control section and driving power enlarged portion, the electric valve controller connection reducer, and electric valve controller connects permagnetic synchronous motor simultaneously.
2. device according to claim 1, it is characterized in that described driving power enlarged portion comprises drive circuit, signal isolation drive power supply, voltage sampling circuit, current sampling circuit, protective circuit, protective circuit comprise braking protective circuit, overvoltage crowbar, under-voltage protecting circuit; DSP connects the signal isolated drive circuit; The signal isolated drive circuit connects drive circuit (IPM), and the on state of switching signal decision motor windings is provided for drive circuit; Voltage sampling circuit connects drive circuit, and voltage sampling circuit connects DSP simultaneously; Braking circuit, overvoltage circuit, under-voltage circuit are connected to form protective circuit successively.
3. device according to claim 1 is characterized in that described DSP control section comprises dsp chip, the DSP peripheral circuit, and the testing circuit of current signal, position detecting circuit shows and the button drive circuit; Described DSP peripheral circuit is the chip external memory that connects user's expansion by the external memory interface module EMIF of DSP; And the jtag interface that passes through DSP connects external emulator;
The testing circuit of described current signal is a motor windings process Hall current sensor, and Hall current sensor connects the A/D ALT-CH alternate channel that resistance is connected to DSP again;
Described position detecting circuit comprises rotary transformer, function generator, high frequency power amplification chip, quantizer.
4. device according to claim 1 is characterized in that described permagnetic synchronous motor adopts rotary transformer as position transducer; Function generator produces sinusoidal signal and is connected to high frequency power amplification chip; High frequency power is amplified chip output sinusoidal signal connection rotary transformer provides excitation for it; It is the digital type angle value with the signal conversion that rotary transformer produces that quantizer connects rotary transformer.
5. device according to claim 1 is characterized in that described DSP connects control LED nixie tube display unit by the SPI interface.
6. device according to claim 1 is characterized in that described DSP detects pin by the I/O port as button and connects the keyboard input unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203512383U CN201636414U (en) | 2009-12-29 | 2009-12-29 | Device for microstep adjustment of valve by using permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203512383U CN201636414U (en) | 2009-12-29 | 2009-12-29 | Device for microstep adjustment of valve by using permanent magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN201636414U true CN201636414U (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203512383U Expired - Lifetime CN201636414U (en) | 2009-12-29 | 2009-12-29 | Device for microstep adjustment of valve by using permanent magnet synchronous motor |
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| CN (1) | CN201636414U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734531A (en) * | 2011-03-30 | 2012-10-17 | 阿自倍尔株式会社 | Positioner |
| CN110112983A (en) * | 2019-01-30 | 2019-08-09 | 安徽普云信息科技有限公司 | A kind of control system and its control method of motor Grey Prediction Fuzzy PID controller |
-
2009
- 2009-12-29 CN CN2009203512383U patent/CN201636414U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734531A (en) * | 2011-03-30 | 2012-10-17 | 阿自倍尔株式会社 | Positioner |
| CN102734531B (en) * | 2011-03-30 | 2014-11-05 | 阿自倍尔株式会社 | Positioner |
| CN110112983A (en) * | 2019-01-30 | 2019-08-09 | 安徽普云信息科技有限公司 | A kind of control system and its control method of motor Grey Prediction Fuzzy PID controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101117 Effective date of abandoning: 20091229 |