CN102843081A - Driver of stepper motor - Google Patents
Driver of stepper motor Download PDFInfo
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- CN102843081A CN102843081A CN2012103690423A CN201210369042A CN102843081A CN 102843081 A CN102843081 A CN 102843081A CN 2012103690423 A CN2012103690423 A CN 2012103690423A CN 201210369042 A CN201210369042 A CN 201210369042A CN 102843081 A CN102843081 A CN 102843081A
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Abstract
The invention discloses a driver of a stepper motor, which comprises a power supply module, a driver chip and a control module, wherein the power supply module comprises a direct-current voltage input end and a power supply output end; a circuit is formed by the direct-current voltage input end with the power supply output end through a three-end voltage stabilizer; the driver chip comprises a reference voltage pin, a first reference voltage pin and a second reference voltage pin; the reference voltage pin is connected with the power supply input end; the reference voltage pin is connected with the first reference voltage pin and the second reference voltage pin through a voltage splitting potentiometer; an output end of the driver chip is connected with the stepper motor; a power supply input end of the control module is connected with voltage externally; and output end of the control module is connected with a singlechip module through a plurality of optical coupling circuits respectively. The invention aims at providing the driver of the stepper motor; and with the adoption of the driver of the stepper motor, the requirements on the use of the stepper motor are met, at the same time, the power is reduced, the energy consumption is small, moreover, the manufacturing cost is reduced, and the size is small.
Description
Technical field
The present invention relates to the stepping motor field, especially relate to a kind of stepper motor driver.
Background technology
Stepping motor is the actuator of electric impulse signal being changed into angular displacement or displacement of the lines, and stepping motor can directly carry out open loop control with digital signal, realizes accurate control effect through simple structure.
But stepping motor can not directly be received on industrial frequency AC or the DC power supply and work, and must use special-purpose stepper motor driver; When stepper motor driver receives a pulse signal; Just can drive stepping motor rotate a fixing angle by the direction of setting, i.e. " step angle ", and come the pilot angle displacement through the number of control impuls; Thereby reach the purpose of accurate location, and can be through the speed and the acceleration of control impuls FREQUENCY CONTROL motor rotation.Thereby reach the purpose of speed governing.
Yet the power of present stepper motor driver all is bigger, so the cost consumption of driver is high, and volume is big and have problems such as low load with strong power, energy consumption are big.
Summary of the invention
To the problem of above-mentioned existence, the purpose of this invention is to provide a kind of stepper motor driver, this stepper motor driver has reduced power when satisfying the stepping motor user demand, and it is little to consume energy, and has reduced manufacturing cost, and volume is less.
The objective of the invention is to realize through following technical proposals:
A kind of stepper motor driver wherein, comprising:
Power module, said power module comprises defeated dc voltage input end, power output end, said dc voltage input end is formed a circuit through three terminal regulator and power output end;
Driver chip; The B of A phase drive circuit that said driver chip comprises the A phase coil that is used for drive stepping motor and the B phase coil that is used to drive said stepping motor is drive circuit mutually; Said driver chip comprises a reference voltage pin; The first reference voltage pin and the second reference voltage pin, the said first reference voltage pin are used for confirming the reference voltage of A phase drive circuit, and the said second reference voltage pin is used for confirming the reference voltage of B phase drive circuit; Said reference voltage pin is connected with said power input, and said reference voltage is connected with the said first reference voltage pin, said second voltage pin through the partial pressure potential device; The output of said driver chip is connected with said stepping motor;
Control module, the external voltage of the power input of said control module, the output of said control module is connected with said driver chip respectively through a plurality of photoelectric coupled circuit.
Above-mentioned stepper motor driver; Wherein, Said photoelectric coupled circuit comprises first photoelectric coupled circuit; Said control module comprises the CP signal pins that is used to discharge the clock sequence signal, and said CP signal pins is connected with the pin STEP of definite drive pattern of said driver chip through said first photoelectric coupled circuit.
Above-mentioned stepper motor driver, wherein, the input of said first photoelectric coupled circuit comprises first resistance, second resistance, the output of said first photoelectric coupled circuit is provided with first electric capacity and the 3rd resistance.
Above-mentioned stepper motor driver; Wherein, Said photoelectric coupled circuit comprises one second photoelectric coupled circuit; Said control module comprises a SP/ST pin, is used to control the startup of motor or close, and said SP/ST pin is formed a circuit through the first reference voltage pin (AVREF) and the second reference voltage pin (BVREF) of second photoelectric coupled circuit and said driver chip; Said control module comprises a DIR pin to said chip for driving outbound course signal; Said driver chip comprises the direction signal DIR pin of controlling motor steering; The direction signal DIR pin of said control module is connected with the DIR pin of said driver chip through said second photoelectric coupled circuit; Said driver chip also comprises the FREE pin, is used to control the rotary state of motor, and said FREE pin is connected with said control module RST pin through said second photoelectric coupled circuit.
Above-mentioned stepper motor driver; Wherein, Said photoelectric coupled circuit comprises the 3rd photoelectric coupled circuit; Said driver chip also comprises the signal HOME pin that is used to characterize its state, and the HOME pin of said driver chip is connected with the HOME pin of said control module through said the 3rd photoelectric coupled circuit.
Above-mentioned stepper motor driver; Wherein, Said driver chip output comprises A positive output end, A reversed-phase output; Said A positive output end, A reversed-phase output are by the circuit that is used for drive motors A phase coil in the said driver chip, and said driver chip output also comprises B positive output end, B reversed-phase output, and said B positive output end, B reversed-phase output are by the circuit that is used for drive motors B phase coil in the said driver chip; Said A phase input, first coil of said A phase output terminal and said motor is formed a loop circuit; Second coil of said B phase input, B phase output terminal and said motor is formed a loop circuit.
Above-mentioned stepper motor driver, wherein, said driver comprises A circuitry phase current detecting pin ISENA and B circuitry phase current detecting pin ISENB, said ISENA pin is connected with the 4th resistance and forms first sample circuit; Said pin ISENB and the 5th resistance are formed second sample circuit.
Above-mentioned stepper motor driver, wherein, three kinds of segmentations of said driver chip configuration pattern M0, M1, M2.
Above-mentioned stepper motor driver is characterized in that, said driver chip is the DRV8825 chip.
The present invention adopts a kind of stepper motor driver, comprises driver chip DRV8825 particularly, and it forms the work of two H-bridge driving circuit drives stepping motors; This stepper motor driver utilizes the work of pwm signal drive motors; When satisfying the stepping motor user demand, reduced power, it is little to consume energy; And having reduced manufacturing cost, volume is less.
Description of drawings
Fig. 1 is the circuit connecting relation sketch map of a kind of stepper motor driver of the present invention.
Embodiment
Below in conjunction with schematic diagram and concrete operations embodiment the present invention is described further.
A kind of stepper motor driver wherein, comprising:
Power module 1, this power module comprise three terminal regulator LM317 (U1), capacitor C 1, and capacitor C 2, capacitor C 3, capacitor C 4, resistance R 1, R24 and R25, light-emitting diode D2, the common power circuit of forming of above-mentioned electronic devices and components, specifically as shown in fig. 1.In this power module 1, its dc voltage input end (VM) 11 inserts the 24V direct voltage, through capacitor C 1; C2 filtering; Be adjusted to the output of 5V voltage through three terminal regulator LM317, resistance R 24, R25, through capacitor C 3, C4 carries out being exported by power output end (VCC) after the filtering again; As the power supply of driver chip 2, and can be used to indicate power module 1 whether to switch on through branch road R1 and light-emitting diode D2.
Further; As shown in fig. 1, driver chip 2, this driver chip 2 is the DRV8825 chip for driving; Wherein, One reference voltage pin of this driver chip 2, i.e. V3P3OUT pin (15), this reference voltage pin is connected with said power input VM; This voltage VM is converted to the voltage of 3.3V; The voltage that to change through a current-limiting resistance R28 and a partial pressure potential device RW1 exports first reference voltage pin (12) AVREF to and the second reference voltage pin is BVREF pin (13), and this first reference voltage pin AVREF pin (12) is through A positive output end, i.e. AOUT1 pin (5) and A reversed-phase output; Be that AOUT2 is connected with the A phase coil of stepping motor 3; The positive output end BOUT1 pin of this second reference voltage pin BVREF pin (13) through the B phase is connected with the B phase coil of stepping motor 3 with B reversed-phase output BOUT2 pin, through adjusting the voltage swing that this partial pressure potential device RW1 can change the first reference voltage pin and the second reference voltage pin, wherein and then can realize the control to the size of current of the A phase of stepping motor 3 and B phase coil.
Control module 4, this control module 4 can be sent control signal to driver chip 2 through sending the CP signal (clock signal) that PWM (pwm pulses width) regularly sends certain sequence; Wherein, The external voltage V of the power input of this hole control module 4, and the output of control module 4 is connected with driver chip 2 respectively through a plurality of photoelectric coupled circuit, particularly; The CP pin (6) of this control module 4 is a CP signal end; The CP pin (6) of this control module is connected with the STEP signal pins (22) of driver chip 2 through resistance R 6, the first photoelectric coupled circuit U3, through the output of CP signal, and the rotation of control step motor 3.
In control module 4; Its SP/ST pin (4) is for stopping/commencing signal; This SP/ST pin (4) is through the first reference voltage pin of one second photoelectric coupled circuit (U5) with driver chip 2; Be that the AVREF pin (12) and the second reference voltage pin (13) are formed a circuit through a resistance R 4 with triode Q1, and this triode Q1 is connected with voltage potential divider RW1.In the enforcement; When the SP/ST pin is exported a low level, after this electric current is isolated through second photoelectric coupled circuit (U5), make triode Q1 conducting; At this moment; Partial pressure potential device RW1 can't work, thereby the voltage of the AVREF pin (12) of driver chip 2 and BVREF pin (13) is about 0V, and stepping motor 3 quits work; Otherwise, when the SP/ST pin is exported a high level, not conducting of triode Q1; Voltage potential divider RW1 operate as normal; At this moment, the voltage of AVREF pin (12) and BVREF pin (13) is the voltage of voltage potential divider RW1, and can regulate the A phase coil of stepping motor 3 and the electric current of B phase coil through regulating this voltage potential divider RW1; And, come the rotating speed of control step motor 3 through the electric current of regulating A phase coil and B phase coil through the work of STEP pin (22).Further; DIR signal pins (3) series resistance R16 and second photoelectric coupled circuit (U5) are formed with control circuit with the DIR pin (20) of driver chip 2 in the control module 4; Utilize turning to of control step motor 3; Wherein, when the DIR of control module 4 signal pins (3) output high level, then stepping motor 3 carries out forward rotation; Otherwise when the DIR of control module 4 signal pins (3) output low level, then stepping motor 3 reverses.
In addition, the FREE pin (5) of control module 4 also is connected with the RST pin (16) of driver chip 2 through the first photoelectric coupled circuit U5, and the rotor of stepping motor 3 is in locking state or freely rotates when utilizing this FREE signal to control static state.
In addition, in driver chip 2, also comprise HOME pin (27) and the FAULT pin (18) of showing its state, wherein, HOME pin (27) is through the HOME pin (2) of the 3rd photoelectric coupled circuit U3 output origin pulse signal to control module 4.When being output as low level, expression driver chip 2 homings can accurately be confirmed initial point through the HOME pin (27) of this driver chip 2; And the signal that FAULT pin (18) will be made mistakes through the first photoelectric coupled circuit U5 outputs on the FAULT pin (1) of control module, and the subcircuits of forming through resistance R 21 and Light-Emitting Diode D4 is as cue circuit.Bag
Further; The output of driver chip 2 through pin ISENA (6) with the 4th resistance R 21, be connected form first sample circuit, pin ISENB (9) forms second sample circuit with the 5th resistance R 15, respectively can to the B of the A phase output circuit electric current of drive stepping motor A phase coil and B phase coil mutually the output circuit electric current detect.
In the present invention; This driver chip (DRV8825) 2 comprises that toggle switch---pin M0 (24), pin M1 (25), pin M2 (26) confirm the working method of stepping motor 3 in the segmentation selection; Particularly; Through the setting of this segmentation selector switch, can confirm that stepping motor carries out work with full step, 1/2,1/4,1/8,1/16 or 1/32 step.
More than specific embodiment of the present invention is described in detail, but the present invention is not restricted to the specific embodiment of above description, it is just as example.To those skilled in the art, any equivalent modifications and alternative also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (9)
1. a stepper motor driver is characterized in that, comprising:
Power module, said power module comprises defeated dc voltage input end, power output end, said dc voltage input end is formed a circuit through three terminal regulator and power output end;
Driver chip; The B of A phase drive circuit that said driver chip comprises the A phase coil that is used for drive stepping motor and the B phase coil that is used to drive said stepping motor is drive circuit mutually; Said driver chip comprises a reference voltage pin; The first reference voltage pin and the second reference voltage pin, the said first reference voltage pin are used for confirming the reference voltage of A phase drive circuit, and the said second reference voltage pin is used for confirming the reference voltage of B phase drive circuit; Said reference voltage pin is connected with said power input, and said reference voltage is connected with the said first reference voltage pin, said second voltage pin through the partial pressure potential device; The output of said driver chip is connected with said stepping motor;
Control module, the external voltage of the power input of said control module, the output of said control module is connected with said driver chip respectively through a plurality of photoelectric coupled circuit.
2. stepper motor driver according to claim 1; It is characterized in that; Said photoelectric coupled circuit comprises first photoelectric coupled circuit; Said control module comprises the CP signal pins that is used to discharge the clock sequence signal, and said CP signal pins is connected with the pin STEP of definite drive pattern of said driver chip through said first photoelectric coupled circuit.
3. stepper motor driver according to claim 2 is characterized in that, the input of said first photoelectric coupled circuit comprises first resistance, second resistance, and the output of said first photoelectric coupled circuit is provided with first electric capacity and the 3rd resistance.
4. stepper motor driver according to claim 1; It is characterized in that; Said photoelectric coupled circuit comprises one second photoelectric coupled circuit; Said control module comprises a SP/ST pin, is used to control the startup of motor or close, and said SP/ST pin is formed a circuit through the first reference voltage pin (AVREF) and the second reference voltage pin (BVREF) of second photoelectric coupled circuit and said driver chip; Said control module comprises a DIR pin to said chip for driving outbound course signal; Said driver chip comprises the direction signal DIR pin of controlling motor steering; The direction signal DIR pin of said control module is connected with the DIR pin of said driver chip through said second photoelectric coupled circuit; Said driver chip also comprises the FREE pin, is used to control the rotary state of motor, and said FREE pin is connected with said control module RST pin through said second photoelectric coupled circuit.
5. stepper motor driver according to claim 1; It is characterized in that; Said photoelectric coupled circuit comprises the 3rd photoelectric coupled circuit; Said driver chip also comprises the signal HOME pin that is used to characterize its state, and the HOME pin of said driver chip is connected with the HOME pin of said control module through said the 3rd photoelectric coupled circuit.
6. stepper motor driver according to claim 1; It is characterized in that, above-mentioned stepper motor driver, wherein; Said driver chip output comprises A positive output end, A reversed-phase output; Said A positive output end, A reversed-phase output are by the circuit that is used for drive motors A phase coil in the said driver chip, and said driver chip output also comprises B positive output end, B reversed-phase output, and said B positive output end, B reversed-phase output are by the circuit that is used for drive motors B phase coil in the said driver chip; Said A phase input, first coil of said A phase output terminal and said motor is formed a loop circuit; Second coil of said B phase input, B phase output terminal and said motor is formed a loop circuit.
7. stepper motor driver according to claim 1; It is characterized in that; Said driver comprises A circuitry phase current detecting pin ISENA and B circuitry phase current detecting pin ISENB, and said ISENA pin is connected with the 4th resistance and forms first sample circuit; Said pin ISENB and the 5th resistance are formed second sample circuit.
8. stepper motor driver according to claim 1 is characterized in that, three kinds of segmentations of said driver chip configuration pattern M0, M1, M2.
9. stepper motor driver according to claim 1 is characterized in that, said driver chip is the DRV8825 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103690423A CN102843081A (en) | 2012-09-27 | 2012-09-27 | Driver of stepper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103690423A CN102843081A (en) | 2012-09-27 | 2012-09-27 | Driver of stepper motor |
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| Publication Number | Publication Date |
|---|---|
| CN102843081A true CN102843081A (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103690423A Pending CN102843081A (en) | 2012-09-27 | 2012-09-27 | Driver of stepper motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360613A (en) * | 2014-10-15 | 2015-02-18 | 诸暨中澳自动化设备有限公司 | Control circuit of intelligent electric tool |
Citations (4)
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|---|---|---|---|---|
| US5748327A (en) * | 1992-11-12 | 1998-05-05 | Canon Kabushiki Kaisha | Image communicating apparatus with direct supply of power from a battery to various units |
| CN201690406U (en) * | 2010-04-15 | 2010-12-29 | 山东欧锴空调科技有限公司 | Permanent magnetic brushless direct-current motor driver |
| CN101969291A (en) * | 2010-10-28 | 2011-02-09 | 哈尔滨工业大学 | System-on-chip driver of high-subdivision multi-path stepping motor |
| CN202856676U (en) * | 2012-09-27 | 2013-04-03 | 上海古鳌电子科技股份有限公司 | Stepper motor driver |
-
2012
- 2012-09-27 CN CN2012103690423A patent/CN102843081A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5748327A (en) * | 1992-11-12 | 1998-05-05 | Canon Kabushiki Kaisha | Image communicating apparatus with direct supply of power from a battery to various units |
| CN201690406U (en) * | 2010-04-15 | 2010-12-29 | 山东欧锴空调科技有限公司 | Permanent magnetic brushless direct-current motor driver |
| CN101969291A (en) * | 2010-10-28 | 2011-02-09 | 哈尔滨工业大学 | System-on-chip driver of high-subdivision multi-path stepping motor |
| CN202856676U (en) * | 2012-09-27 | 2013-04-03 | 上海古鳌电子科技股份有限公司 | Stepper motor driver |
Non-Patent Citations (1)
| Title |
|---|
| TEXAS INSTRUMENTS: "STEPPER MOTOR CONTROLLER IC check for samples:DRV8825", 《TEXAS INSTRUMENTS》, 30 September 2011 (2011-09-30) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360613A (en) * | 2014-10-15 | 2015-02-18 | 诸暨中澳自动化设备有限公司 | Control circuit of intelligent electric tool |
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Application publication date: 20121226 |