CN203071854U - Brushless direct current motor control system - Google Patents
Brushless direct current motor control system Download PDFInfo
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- CN203071854U CN203071854U CN2013200996386U CN201320099638U CN203071854U CN 203071854 U CN203071854 U CN 203071854U CN 2013200996386 U CN2013200996386 U CN 2013200996386U CN 201320099638 U CN201320099638 U CN 201320099638U CN 203071854 U CN203071854 U CN 203071854U
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Abstract
A brushless direct current motor control system belongs to the field of motor control, and aims at solving the problem that a traditional brushless direct current motor control system which has a single-chip microcomputer additionally provided with many kinds of interface equipments is complex, thus the traditional brushless direct current motor control system is difficult to realize all-digital control from a speed loop to an electric current loop. The brushless direct current motor control system comprises a DSP (Digital Signal Processor), a power drive circuit, a three-phase inverter, a phase current detection circuit and a position sensor; wherein a PWM (Pulse Width Modulation) demand output end of the DSP is connected with an input end of the power drive circuit, an output end of the power drive circuit is connected with an input end of the three-phase inverter, an output end of the three-phase inverter is connected with a control end of a brushless direct current motor; the phase current detection circuit is used for detecting three-phase phase currents of the brushless direct current motor, a phase current signal output end of the phase current detection circuit is connected with a phase current signal input end of the DSP; the position sensor is used for detecting a rotor position signal of the brushless direct current motor, and a rotor position signal output end of the position sensor is connected with a rotor position signal input end of the DSP.
Description
Technical field
The utility model relates to brushless DC motor control system, belongs to Motor Control Field.
Background technology
Brushless DC motor is as a kind of novel stepless variable-speed motor, the volume that not only has alternating current machine is little, in light weight, characteristics such as inertia is little, and have a good speed adjusting performance of DC motor, but there is not the shortcoming of mechanical commutator, therefore obtained using widely, no matter at Digit Control Machine Tool, robots etc. make manufacture field, or household electrical appliance are (as washing machine, computer hard discs etc.) occasion all comes into one's own day by day, and the control system of brshless DC motor in the past is many to be made of the additional many kinds of interface equipments of single-chip microcomputer, not only complicated, and speed also is restricted, and is difficult to realize the digital control from the speed ring to the electric current loop, also is inconvenient to expand.
Summary of the invention
The utility model purpose is in order to solve by the additional many kinds of traditional brushless DC motor control system complexity that interface equipment constitutes of single-chip microcomputer, and speed also is restricted, be difficult to realize the digital control from the speed ring to the electric current loop, also be inconvenient to the problem expanded, a kind of brushless DC motor control system is provided.
Brushless DC motor control system described in the utility model, it comprises DSP, power driving circuit, three-phase inverter, phase current testing circuit and position transducer,
The PWM instruction output end of DSP links to each other with the input of power driving circuit, and the output of power driving circuit links to each other with the input of three-phase inverter, and the output of three-phase inverter links to each other with the control end of brshless DC motor;
The phase current testing circuit detects the three-phase phase current of brshless DC motor, and the phase current signal output of phase current testing circuit links to each other with the phase current signal input of DSP;
Position transducer detects the rotor-position signal of brshless DC motor, and the rotor-position signal output of position transducer links to each other with the rotor-position signal input of DSP.
Advantage of the present utility model:
The utility model adopts digital signal processor (DSP) to realize the control procedure of motor servo system, only single-chip microcomputer and various interface have just been substituted with a slice DSP, realize the full-digital control of position and speed and electric current loop, with compare based on the brushless DC motor control system of general single-chip microcomputer, processing speed of the present utility model and precision all surmount traditional control system far away, the quick operational capability of DSP can make numerical control system carry out computing in real time, its internal structure makes control system can realize more complicated control algolithm, speed ring and electric current loop can be realized with digital form, be formed the brushless DC motor control system of realizing in digital mode.
The utility model response speed is faster, overshoot is littler, good stability, and tracing property is fast.
Description of drawings
Fig. 1 is the theory diagram of brushless DC motor control system described in the utility model;
Fig. 2 is the structural representation of power-switching circuit.
Embodiment
Embodiment one: below in conjunction with Fig. 1 present embodiment is described, the described brushless DC motor control system of present embodiment, it comprises DSP1, power driving circuit 2, three-phase inverter 3, phase current testing circuit 4 and position transducer 5,
The PWM instruction output end of DSP1 links to each other with the input of power driving circuit 2, and the output of power driving circuit 2 links to each other with the input of three-phase inverter 3, and the output of three-phase inverter 3 links to each other with the control end of brshless DC motor;
Phase current testing circuit 4 detects the three-phase phase current of brshless DC motor, and the phase current signal output of phase current testing circuit 4 links to each other with the phase current signal input of DSP1; The output of phase current testing circuit 4 connects the input of A/D unit among the DSP1;
Position transducer 5 detects the rotor-position signal of brshless DC motor, and the rotor-position signal output of position transducer 5 links to each other with the rotor-position signal input of DSP1.Position transducer 5 connects quadrature coding pulse circuit among the DSP1;
DSP1 employing model is that the digital signal processor of TMS320LF2407A is realized.
The Hall element that position transducer 5 adopts brshless DC motor to carry is realized.
The PWM mode that adopts native system realizes the control to brshless DC motor.Exchange input and provide DC power supply through over commutation, voltage stabilizing and for three inverters 3.Drive part adopts the driver module IR2132S of Int Rectifier Corp, and control is made up of der Geschwindigkeitkreis and the two closed loops of electric current loop, thereby has improved the control precision of brshless DC motor effectively.The position is provided by the Hall element that brshless DC motor carries, and catches the location by the CAP end of LF2407A.According to rate signal, DSP1 produces certain PWM ripple.By adjusting the switching time of six power tubes in the PWM wave width control three-phase inverter 3, the R2132S chip can be controlled the turn-on and turn-off order of six high power valves simultaneously, thereby reach the purpose of control motor speed and rotating, realize the control to brshless DC motor.Electric current is passed on three-phase current signal by single current Hall transducer and is sampled by the A/D that LF2407A carries under the control of LF2407A, adjust the duty ratio of PWM ripple by LF2407A according to current sampling data, thereby changes phase current magnitude.
System selects for use the PDPINTA pin of TMS320LF2407A as the input of system protection signal, in case when system breaks down, PDPINTA pin level step-down, all PWM output pins all are set to high-impedance state, and interruption this moment will be generated.
Embodiment two: present embodiment is described further execution mode one, it also comprises keyboard 6 and display 7, the external command output of keyboard 6 links to each other with the external command input of DSP1, and the demonstration signal output part of DSP1 links to each other with the demonstration signal input part of display 7.Keyboard 6 connects the I/O port of DSP1.
User-machine interface adopts keyboard 6 and LCD liquid crystal display.
Embodiment three: present embodiment is described further execution mode one, and it comprises also and extend out memory cell 8 that the storage input/output terminal of DSP1 links to each other with the storage input/output terminal that extends out memory cell 8.
Embodiment four: present embodiment is described further execution mode one, and it also comprises main power source 9, and main power source 9 is three-phase inverter 3 power supplies.
Embodiment five: below in conjunction with Fig. 2 present embodiment is described, present embodiment is described further execution mode one, and it also comprises power-switching circuit 10, and the power supply signal output of power-switching circuit 10 links to each other with the power supply signal input of DSP1.
Embodiment six: present embodiment is described further execution mode one, and it also comprises jtag interface circuit 11, and the jtag test signal output part of jtag interface circuit 11 links to each other with the jtag test signal input part of DSP1.
Embodiment seven: present embodiment is described further execution mode one, and it also comprises communication interface circuit 12, and the input/output terminal of communication interface circuit 12 links to each other with the serial ports of DSP1.
Claims (9)
1. brushless DC motor control system is characterized in that, it comprises DSP (1), power driving circuit (2), three-phase inverter (3), phase current testing circuit (4) and position transducer (5),
The PWM instruction output end of DSP (1) links to each other with the input of power driving circuit (2), and the output of power driving circuit (2) links to each other with the input of three-phase inverter (3), and the output of three-phase inverter (3) links to each other with the control end of brshless DC motor;
Phase current testing circuit (4) detects the three-phase phase current of brshless DC motor, and the phase current signal output of phase current testing circuit (4) links to each other with the phase current signal input of DSP (1);
Position transducer (5) detects the rotor-position signal of brshless DC motor, and the rotor-position signal output of position transducer (5) links to each other with the rotor-position signal input of DSP (1).
2. according to the described brushless DC motor control system of claim 1, it is characterized in that, it also comprises keyboard (6) and display (7), the external command output of keyboard (6) links to each other with the external command input of DSP (1), and the demonstration signal output part of DSP (1) links to each other with the demonstration signal input part of display (7).
3. according to the described brushless DC motor control system of claim 2, it is characterized in that display (7) adopts the LCD LCD to realize.
4. according to the described brushless DC motor control system of claim 1, it is characterized in that it comprises also and extend out memory cell (8) that the storage input/output terminal of DSP (1) links to each other with the storage input/output terminal that extends out memory cell (8).
5. according to the described brushless DC motor control system of claim 1, it is characterized in that it also comprises main power source (9), main power source (9) is three-phase inverter (3) power supply.
6. according to the described brushless DC motor control system of claim 1, it is characterized in that it also comprises power-switching circuit (10), the power supply signal output of power-switching circuit (10) links to each other with the power supply signal input of DSP (1).
7. according to the described brushless DC motor control system of claim 1, it is characterized in that it also comprises jtag interface circuit (11), the jtag test signal output part of jtag interface circuit (11) links to each other with the jtag test signal input part of DSP (1).
8. according to the described brushless DC motor control system of claim 1, it is characterized in that it also comprises communication interface circuit (12), the input/output terminal of communication interface circuit (12) links to each other with the serial ports of DSP (1).
9. according to claim 1,2,4,5,6,7 or 8 described brushless DC motor control systems, it is characterized in that DSP (1) employing model is that the digital signal processor of TMS320LF2407A is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200996386U CN203071854U (en) | 2013-03-05 | 2013-03-05 | Brushless direct current motor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200996386U CN203071854U (en) | 2013-03-05 | 2013-03-05 | Brushless direct current motor control system |
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| Publication Number | Publication Date |
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| CN203071854U true CN203071854U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013200996386U Expired - Fee Related CN203071854U (en) | 2013-03-05 | 2013-03-05 | Brushless direct current motor control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300845A (en) * | 2014-10-17 | 2015-01-21 | 中国石油天然气股份有限公司 | Automobile brushless DC motor driver |
| CN106026796A (en) * | 2016-07-13 | 2016-10-12 | 河海大学 | Brushless DC motor speed regulation system |
| CN107659226A (en) * | 2017-11-07 | 2018-02-02 | 南京理工大学 | A kind of phase change control method of electric steering engine drive device |
-
2013
- 2013-03-05 CN CN2013200996386U patent/CN203071854U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300845A (en) * | 2014-10-17 | 2015-01-21 | 中国石油天然气股份有限公司 | Automobile brushless DC motor driver |
| CN106026796A (en) * | 2016-07-13 | 2016-10-12 | 河海大学 | Brushless DC motor speed regulation system |
| CN107659226A (en) * | 2017-11-07 | 2018-02-02 | 南京理工大学 | A kind of phase change control method of electric steering engine drive device |
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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: 20130717 Termination date: 20140305 |