CN202406076U - 180-degree frequency-variable controller of brushless direct current motor - Google Patents
180-degree frequency-variable controller of brushless direct current motor Download PDFInfo
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- CN202406076U CN202406076U CN201120529849XU CN201120529849U CN202406076U CN 202406076 U CN202406076 U CN 202406076U CN 201120529849X U CN201120529849X U CN 201120529849XU CN 201120529849 U CN201120529849 U CN 201120529849U CN 202406076 U CN202406076 U CN 202406076U
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Abstract
The utility model discloses a sine wave frequency-variable controller of a brushless direct current motor, that is to say, a 180-degree frequency-variable controller, which is mainly applied for motor control of an electric vehicle. The controller comprises a single-chip microcomputer control module, a current sampling module and a power drive module. The brushless direct current motor is a controlled object of a system. An STM (Scanning Tunneling Microscope) single-chip microcomputer is taken as a core control device and is respectively connected with the drive module, the current sampling module and a position detection module. A working process of the controller is that by a position signal detected by a Hall sensor on a rotor, a corresponding power switch device, which is connected with an armature winding, is driven by the controller through an electron commutation circuit, so that the armature winding feeds in sequence, thus a round rotating magnetic field is formed on a stator winding to drive a permanent magnet rotor to rotate. Along with the rotation of the rotor, the positions are detected and the signals are sent continuously through the position sensor, so that a power-up state of the armature winding is changed, the process is repeated again and again, and an electromagnetic torque direction of the stator winding acted on a rotor permanent magnet is kept invariably, thus the motor is rotated continuously.
Description
Technical field
The utility model is a brushless DC motor drive variable frequency controller, belongs to variable-frequency motor and drives the field, is used for the electric motor car Motor Control.
Background technology
The prior electric vehicle controller all is 120 degree frequency-variable controllers, and its phase current waveform is the stairstepping square wave.Have only two to be conducted in any time three-phase, one ends mutually, shows on the drive waveforms to be exactly in any electric cycle, and every phase is a conducting 120 degree all.This mode is modal to be to adopt six to clap the switching-over controlling Design, and algorithm is very simple, realizes easily.Shortcoming is torque and rotation speed change big the time, and efficient is just low, and torque characteristics is poor, even loses speed, shakes easily at low speed segment.
Angle from CPU; Existing 180 degree direct current sine wave drive adopt dsp chip to drive usually; Because resource is abundant inadequately on the 51 traditional single-chip microcomputer sheets; Make traditional single-chip microcomputer can not be competent at signal and Mathematical Modeling processing that sinusoidal wave direct current machine drives, and the resource of dsp chip can not maximize the use, and has waste to a certain degree concerning brushless DC motor.
The utility model content
The technical problem that the utility model will solve is: overcome the deficiency in prior art and the practical application thereof, a kind of low-power consumption is provided, motor brushless DC motor 180 degree frequency-variable controllers substitute 120 original degree frequency-variable controllers cheaply.
The utility model solves the technical scheme that its technical problem adopted: electric vehicle brushless DC motor 180 degree frequency-variable controllers is characterized in that: comprise power circuit, single chip machine controlling circuit, PWM change-over circuit, current sampling circuit and power of motor drive circuit.Power circuit is respectively motor and with other circuit 48V and 5V power supply is provided.Power circuit one end links to each other with power model; One end links to each other with single chip machine controlling circuit through level conversion; The single-chip microcomputer CPU links to each other with power model through the PWM change-over circuit; The output of power model three-phase links to each other with brushless DC motor, and brushless DC motor links to each other with Hall element, and single-chip microcomputer links to each other with sample circuit.
High-performance, low price control chip STM8S207 that said acp chip adopts ST Microelectronics to produce.Under the 24MHz frequency, highest point reason usefulness is up to 20MIPS.Stack pointer and 16 position index registers can improve the list processing performance, and in addition, characteristics such as the improvement of stack pointer, newly-increased addressing mode and new instruction have strengthened the support to C programming and real-time performance, and have improved code density and processor efficiency.This chip has been equipped with and has enriched peripheral hardware, can support accurately control and function for monitoring, comprises 10 analog to digital converters, and 16 passages are arranged at most, and the conversion time spent is less than 3 microseconds; 16 advanced control timers can be used for motor control, catch/comparison and PWM function.This processor has the powerful disposal ability and the speed of service, and power consumption is ultralow, advantages such as convenient in application.
Said power circuit is characterized in that: the ripple during for the filtering machine operation on the bus, stablize busbar voltage, between 48V the parallel connection the big electric capacity of a 330uF/80V.Power supply and three 5V power supplys that a 15V is arranged on the control circuit board.Wherein three 5V power supplys are from the 15V power source conversion, wherein have only one with it altogether, two is to adopt the switching power source chip design in addition, is two 5V that isolate.The 15V power supply is by the 24V power source conversion, and the 24V interface is from the series voltage of two batteries.
Said power circuit is characterized in that: sample circuit is realized the difference sampling by operational amplifier, adopts CHMC D393 chip, and this chip is that two voltage ratios are than integrated operational amplifier circuit.
Said power circuit is characterized in that: its drive circuit comprises brachium pontis drive circuit and following brachium pontis drive circuit, and the upper and lower bridge arm circuit links to each other, a circuitry phase of driven in common motor.
Description of drawings
Fig. 1 is the utility model controlling schemes block diagram;
Fig. 2 is STM single chip machine controlling circuit figure;
Fig. 3 is power driving circuit figure.
Specific embodiments
Below in conjunction with accompanying drawing and through embodiment the utility model is further specified.
Shown in accompanying drawing 1, this frequency-variable controller comprises: power circuit, STM single chip machine controlling circuit, current detection circuit, power driving circuit and position detecting circuit.
Power circuit provides 48V and 5V power supply for each circuit, and single chip circuit is electrically connected with power driving circuit, current detection circuit, location parameter testing circuit, and power driving circuit drives brushless DC motor.
High-performance, low price control chip STM8S207 that single-chip microcomputer adopts ST Microelectronics to produce; This chip has been equipped with and has enriched peripheral hardware, can support accurately control and function for monitoring, comprises 10 analog to digital converters; 16 passages are arranged at most, and the conversion time spent is less than 3 microseconds; 16 advanced control timers can be used for motor control, catch/comparison and PWM function.This processor has the powerful disposal ability and the speed of service, and power consumption is ultralow, advantages such as convenient in application.
Current sampling circuit adopts Hall current sensor, gathers the three-phase current of motor, and is as shown in Figure 2.Circuit is realized the difference sampling by operational amplifier; Adopt CHMC D393 chip; This chip be two voltage ratios than integrated operational amplifier circuit, the previous people's of putting device be used as reverser can with the input waveform amplitude be controlled at ± 1.65V between, a back amplifier is an adder; One of them addend is-the 15V level that another is previous amplifier output U1.
The brushless DC motor drive current is the three phase sine electric current; Be to produce through the inversion bridge circuit that MOSFET or IGBT form; Inverter bridge is a three-phase brachium pontis of being made up of six switching tubes, adopts suitable switching strategy can make the electric current in motor three phase windings become the three phase sine electric current.This system adopts three pairs of youngster K80E08K3 pipes to form inverter circuit.Fig. 3 is a phase inversion bridge circuit figure.
Claims (4)
1. brushless DC motor 180 is spent frequency-variable controllers; It is characterized in that: comprise power circuit, single chip machine controlling circuit, PWM change-over circuit, current sampling circuit and power of motor drive circuit; Power circuit is respectively motor and with other circuit 48V and 5V power supply is provided, and power circuit one end links to each other with power model, and an end links to each other with single chip machine controlling circuit through level conversion; The single-chip microcomputer CPU links to each other with power model through the PWM change-over circuit; The output of power model three-phase links to each other with brushless DC motor, and brushless DC motor links to each other with Hall element, and single-chip microcomputer links to each other with sample circuit.
2. require described brushless DC motor 180 degree frequency-variable controllers according to right 1; It is characterized in that: the ripple during for the filtering machine operation on the bus; Stablize busbar voltage; Between 48V parallel connection the big electric capacity of a 330uF/80V, power supply and three 5V power supplys of a 15V are arranged on the control circuit board.Wherein three 5V power supplys are from the 15V power source conversion, wherein have only one with it altogether, two is to adopt the switching power source chip design in addition, is two 5V that isolate, the 15V power supply is by the 24V power source conversion, the 24V interface is from the series voltage of two batteries.
3. require described brushless DC motor 180 degree frequency-variable controllers according to right 1, it is characterized in that: sample circuit is realized the difference sampling by operational amplifier, adopts CHMC D393 chip, and this chip is that two voltage ratios are than integrated operational amplifier circuit.
4. require described brushless DC motor 180 degree frequency-variable controllers according to right 1, it is characterized in that: drive circuit comprises brachium pontis drive circuit and following brachium pontis drive circuit, and the upper and lower bridge arm circuit links to each other, a circuitry phase of driven in common motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120529849XU CN202406076U (en) | 2011-12-16 | 2011-12-16 | 180-degree frequency-variable controller of brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120529849XU CN202406076U (en) | 2011-12-16 | 2011-12-16 | 180-degree frequency-variable controller of brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202406076U true CN202406076U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120529849XU Expired - Fee Related CN202406076U (en) | 2011-12-16 | 2011-12-16 | 180-degree frequency-variable controller of brushless direct current motor |
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| CN (1) | CN202406076U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967370A (en) * | 2015-07-23 | 2015-10-07 | 苏州思奥半导体科技有限公司 | Sine-wave brushless DC motor driver |
-
2011
- 2011-12-16 CN CN201120529849XU patent/CN202406076U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967370A (en) * | 2015-07-23 | 2015-10-07 | 苏州思奥半导体科技有限公司 | Sine-wave brushless DC motor driver |
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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: 20120829 Termination date: 20141216 |
|
| EXPY | Termination of patent right or utility model |