CN204707064U - X in brushless DC motor control device - Google Patents
X in brushless DC motor control device Download PDFInfo
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- CN204707064U CN204707064U CN201520423019.7U CN201520423019U CN204707064U CN 204707064 U CN204707064 U CN 204707064U CN 201520423019 U CN201520423019 U CN 201520423019U CN 204707064 U CN204707064 U CN 204707064U
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Abstract
The utility model relates to a kind of X in brushless DC motor control device.The main circuit of conventional brushless DC control device of electric motor generally adopts friendship-straight-friendship type frequency changer circuit, series filtering inductance between rectifier bridge and power supply, over the ground and connect the mode of filter capacitor, to eliminate common mode disturbances.A kind of X in brushless DC motor control device; its composition comprises: switch power module (9), described switch power module respectively with master controller DSP(8), keyboard-display circuit (7), EMI be connected with constant current chopper circuit (5), Hall testing circuit (4) with precise rectification circuit (2), overheating protection circuit (6), current acquisition with current foldback circuit (1), current acquisition with converter main circuit (11), power driving circuit (10), current acquisition.The utility model is applied to X in brushless DC motor control device.
Description
technical field:
the utility model relates to a kind of X in brushless DC motor control device.
background technology:
the generation of X in brushless DC motor control device: since 19th century, DC motor appearred in the forties, by means of the direct torque characteristic that it is excellent, in a very long time, accounts for consequence in Electric Drive field.But the brush-commutator of direct current machine has Mechanical Contact, this is the weakness that one is fatal, not only reduces reliability and the life-span of whole system, and limits it and much having the application in dust, the occasion such as inflammable and explosive.In order to this shortcoming of customer service, from the nineties in 20th century, the brushless DC motor eliminating commutator and brush is widely used.Present stage, along with power electronic technology, the development of automatic technology and computer technology, brushless DC motor is widely used in the fields such as Aero-Space, industrial automation, robot driving, electric automobile and household electrical appliance.Various application proposes very high requirement to X in brushless DC motor control device, is no longer only to rely on Analogical Electronics to complete controlling of closed loop.Existing X in brushless DC motor control matching requirements motor rapidity will be got well, and signals collecting precision wants high, and some protection facilities are perfect, have capacity of self-regulation etc.The progress of power electronic technology and computer technology is depended in the development of brushless electric machine to a great extent.The deficiency of conventional brushless DC control device of electric motor: the main circuit of conventional brushless DC control device of electric motor generally adopts friendship-straight-friendship type frequency changer circuit, series filtering inductance between rectifier bridge and power supply, over the ground and connect the mode of filter capacitor, to eliminate common mode disturbances.Brachium pontis two ends adopt electrochemical capacitor, ceramic disc capacitor in parallel with a resistor, then and connect the mode of safety electric capacity, with eliminate when power tube turns off with voltage spine.Drive circuit generally adopts with the TLP250 power drive type optocoupler circuit that is core or directly adopts IPM module, and the pwm signal generated by DSP is directly added in the power tube drive end of this circuit.Control device is provided with current foldback circuit, detects the overcurrent because certain fault causes, and usually utilizes operational amplifier LM358 to form comparative voltage and detects whether produce overcurrent condition.A/D converter is utilized to carry out the collection of electric current, it is the Hall element collection three-phase current by being added in brushless electric machine three-phase alternating current input, master controller DSP is fed back to, as the feedback signal of current inner loop electric current by the precise rectification circuit utilizing single amplifier to form.There is a lot of deficiencies in conventional control device, in restraint speckle, conventional control device is generally only considered to eliminate common mode disturbances, and ignores differential mode noise.In the design of major loop, only consider to eliminate voltage spine by safety electric capacity in parallel, do not consider the instability that the concussion produced in power tube turn off process causes.In overcurrent protection, conventional control device additional over-current protective circuit is applicable to the overcurrent caused by certain fault, and does not consider to cause the too high power tube that causes of electric current frequently to cut-off due to overload, reduction working life.
summary of the invention:
the purpose of this utility model is to provide a kind of X in brushless DC motor control device.
above-mentioned object is realized by following technical scheme:
a kind of X in brushless DC motor control device; its composition comprises: switch power module, and described switch power module is connected with constant current chopper circuit, Hall testing circuit with precise rectification circuit, overheating protection circuit, current acquisition with current foldback circuit, current acquisition with converter main circuit, power driving circuit, current acquisition with master controller DSP, keyboard-display circuit, EMI respectively.
described X in brushless DC motor control device, described master controller DSP respectively with current acquisition and current foldback circuit, current acquisition and precise rectification circuit, power driving circuit, keyboard-display circuit, overheating protection circuit, Hall testing circuit connects, described power driving circuit respectively with EMI and converter main circuit, current acquisition is connected with constant current chopper circuit, described overheating protection circuit is connected with converter main circuit with EMI, described EMI and converter main circuit respectively with current acquisition and current foldback circuit, current acquisition and constant current chopper circuital current gather and precise rectification circuit, brushless electric machine connects, described Hall testing circuit is connected with brushless electric machine.
the beneficial effects of the utility model:
1. the utility model is located at restraint speckle aspect and is improved.In restraint speckle, due to common mode disturbances, in full range field, particularly high frequency field proportion is comparatively large, and therefore, conventional control device adopts common mode choke to add the mode of common mode capacitance over the ground to eliminate common mode interference signal.But, in noise except common mode disturbances, also there is differential mode interference, particularly in low frequency region, the large percentage that differential mode interference accounts for, in the design except suppressing common mode disturbances, be connected in series the mode of shunt-wound capacitance between differential mode inductance and lead-in wire on the line, eliminate differential mode noise.
improve the stability that power tube cut-offs.Owing to there is lead-in inductance in circuit, when IGBT is by when being conducting to shutoff, be added in the voltage jump on IGBT, make IGBT1 shutdown moment with voltage spine, easily cause pipe voltage breakdown.For this reason, conventional control device is to eliminate voltage spine by safety electric capacity in parallel for upper and lower bridge arm two ends.But in IGBT turn off process, although spine is eliminated, there is the concussion of a period of time.For making power tube have high stability in conducting and turn off process, the design is improved between upper and lower bridge arm and is connected in series two groups of Resistor-Capacitor Units, and often overlapping Resistor-Capacitor Unit is a resistance, four electrochemical capacitors.Thus the unsteadiness eliminated in turn off process.
eliminate rush of current during electric motor starting, in main circuit, on relay normally open contact, parallel resistance realizes main circuit and charges soft.Because storage capacitor is equivalent to short circuit when initially powering on, charging current is very large, if add a resistance before filter capacitor, by this resistance and energy storage capacitor in series during startup, DC bus-bar voltage is progressively increased, and when the voltage of storage capacitor rises to 80% of rated value, relay normally open contact closes, achieve charging soft start, thus avoid heavy current impact when starting.
reduce the power tube caused due to overload and cut-off frequency.The electric current caused due to reasons such as load down is excessive, if adopt merely voltage comparator, then the frequency that power device conducting turns off will raise, and switching loss is by excessive.The design limits its electric current by constant current chopper circuit, and it is a steady state value that electric current is exported.Constant current chopper circuit adopts hysteresis comparator.Like this, the switching loss of pipe is effectively reduced.
improve the fail safe that motor runs.The design not only considers the overcurrent protection due to certain fault output, but also the power tube caused due to overload considered cut-offs the frequency too high reduction life-span caused.In addition, owing to working long hours, power tube is overheated unavoidably, and the design adds overheating protection circuit, to eliminate a series of accidents that motor causes device heating to bring due to long-play.Improve the fail safe that motor runs.
save the cost of control device.In power driving circuit, compare IPM module, the design's employing take IR2110 as the bootstrap type drive circuit of core.The collection of output current is the mode utilizing two current Hall transducers to gather three-phase current.In power supply, comparing with UC3845 is the power supply of core, and it is the TOP type Switching Power Supply of core that the design adopts with KA5M02659RN.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present utility model.
accompanying drawing 2 is the utility model main circuit of converter figure.
accompanying drawing 3 is the utility model GAL and bootstrap type power driving circuit figure.
accompanying drawing 4 is the utility model constant current chopper circuit diagrams with stagnant ring.
accompanying drawing 5 is the utility model current acquisition and precise rectification circuit figure.
accompanying drawing 6 is the utility model current acquisition and current foldback circuit figure.
accompanying drawing 7 is the utility model overheating protection circuit figure.
embodiment:
embodiment 1:
a kind of X in brushless DC motor control device; its composition comprises: switch power module 9, and described switch power module is connected with constant current chopper circuit 5, Hall testing circuit 4 with precise rectification circuit 2, overheating protection circuit 6, current acquisition with current foldback circuit 1, current acquisition with converter main circuit 11, power driving circuit 10, current acquisition with master controller DSP8, keyboard-display circuit 7, EMI respectively.
embodiment 2:
x in brushless DC motor control device according to embodiment 1, described master controller DSP respectively with current acquisition and current foldback circuit, current acquisition and precise rectification circuit, power driving circuit, keyboard-display circuit, overheating protection circuit, Hall testing circuit connects, described power driving circuit respectively with EMI and converter main circuit, current acquisition is connected with constant current chopper circuit, described overheating protection circuit is connected with converter main circuit with EMI, described EMI and converter main circuit respectively with current acquisition and current foldback circuit, current acquisition and constant current chopper circuital current gather and precise rectification circuit, brushless electric machine 3 connects, described Hall testing circuit is connected with brushless electric machine.
embodiment 3:
x in brushless DC motor control device according to embodiment 1 or 2.AC power is accessed EMI filter circuit, and the output of EMI connects converter circuit, and the inverter circuit in frequency converter exports the threephase stator coil connecing brshless DC motor.The three-phase Hall element of brushless electric machine connects Hall testing circuit, and the output of testing circuit meets three pin CAP1, CAP2 and CAP3 of DSP master controller.DSP master controller exports six road pwm signals and meets programmable logic chip GAL, and its six tunnel exports accesses three cover power driving circuits respectively, and the output correspondence of power driving circuit connects the trigger end of inverter six power tubes, in order to drive motors rotating operation.Under frequency converter, brachium pontis connects Hall element and gathers current signal, and the output of this current signal is divided into two-way, and a road connects current foldback circuit, and the output of current foldback circuit meets a pin PDPINTA of DSP; Another road signal connects constant current chopper circuit, and it exports the pin meeting programmable logic chip GAL.A, C two of frequency converter three-phase output end connects current Hall transducer, and its output connects precise rectification circuit, and the current signal collected connects three A/D input pins of main control chip DSP, as the given value of current amount of current inner loop.Inverter heat sink takes over heat sensor, and the output of heat sensor meets an optocoupler TLP521 through diode, and it exports the I/O pin meeting main control chip DSP, plays superheat protecting function.Brachium pontis contact relay normally opened contact on frequency converter, an I/O pin of the control termination DSP of relay.On frequency converter, brachium pontis accesses the input that a resistance coating-forming voltage connects Switching Power Supply, in order to provide its operating voltage.The circuit that the output of Switching Power Supply is correlated with for each road provides power supply.Keyboard connects 4 I/O pins of master controller DSP by a TLP521-4 type optocoupler, and display circuit connects SPISTE, SPICLK and SPISISO three pins of master controller DSP, utilizes SPI to carry out data display.
second step scheme: main circuit of converter is specifically implemented as shown in Figure 2.AC power connects the input of EMI filter circuit, two inputs respectively series inductance, side of the same name, parallel resistance R3 and safety electric capacity C5, meets ceramic disc capacitor C2, C1 over the ground respectively., non-same polarity side joint inductance, an electric capacity C6 in parallel, meets ceramic disc capacitor C4, C3 over the ground respectively.Inductance, output connect the input of rectification circuit, shunt capacitance C7 between two outputs.Rectification circuit forms bridge rectifier by D1 ~ D4, and the upper brachium pontis of rectifier bridge is connected in series one by the resistance R1 branch road in parallel with relay contact J1, and the output of R1 connects the input of Switching Power Supply through resistance R2.Grading resistor in parallel and filter capacitor group and inverter circuit between upper and lower bridge arm.Wherein, grading resistor with connect, in filter capacitor group with, with, with, with connect respectively, the resistance of series connection and the mid point of electric capacity link together.Lower brachium pontis between filter capacitor with inverter is connected in series current Hall transducer.Inverter is made up of power tube VT1 ~ VT6, a resistance in parallel between the grid of each power tube, drain electrode.The three-phase of inverter exports the threephase stator winding connecing brushless DC motor.Wherein, A, C two-phase is connected in series respectively current Hall transducer H1, a H3.
3rd step scheme: GAL and bootstrap type power driving circuit are specifically implemented as shown in Figure 3.Output from hysteresis comparator connects No. 1 pin of GAL, and the signal carrying out PWM1 ~ PWM6 pin of autonomous controller DSP connects No. 2 of GAL ~ No. 7 pins.No. 18 of GAL export as C_PWM1 and C_PWM2 with No. 19 pins, connect No. 3 pins of two optocoupler 6N137 respectively.No. 2 pins of two optocoupler 6N137 connect+5V power supply through resistance R11 and R12 respectively.Output No. 5 pins ground connection respectively of two optocoupler 6N137, No. 6 pins connect the input of not gate respectively, and connect+5V power supply through R13, R14 respectively.The output of two not gates connects HIN and the LIN pin of IR2110 respectively, and connects+15V power supply through R15, R16 respectively.IR2110 connects+15V power supply, SD and ground connection.HO and the LO of IR2110 connects the grid of inverter power pipe VT1 and VT2 respectively through resistance R10, R17, pin is powered for+15V, connects pin through diode D5.Pin exports a point two-way, and a road connects pin through electrochemical capacitor E9, and another road directly connects the drain electrode of power tube VT1 and the source electrode of VT2.The connected mode of C_PWM3 and C_PWM4, C_PWM5 and C_PWM6 is with C_PWM1 and C_PWM2.
4th step scheme: the constant current chopper circuit with stagnant ring is specifically implemented as shown in Figure 4.From the current Hall signal of brachium pontis under converter main circuit after the capacitance-resistance filter of R18 and C8, connect the 2 pin in-phase ends of operational amplifier LF353, the 3 pin anti-phase input termination one adjustable resistance R19 of operational amplifier LF353, this resistance connects+5V power supply.Anti-phase input termination one filter capacitor E10 simultaneously, electric capacity minus earth.1 pin of LF353 exports No. 1 pin of termination GAL, and the power supply+12V of output and in-phase input end direct parallel feedback resistance Rf, LF353 connects output 1 pin through resistance R20.
5th step scheme: precise rectification circuit is specifically implemented as shown in Figure 5.Gather the rectification circuit of A, C two-phase, the signal of the A phase current Hall element H1 in exporting from inverter three-phase is divided into two paths of signals after the capacitance-resistance filter that R21 and C9 is formed, one tunnel connects No. 3 in-phase end pins of LF353 through resistance R23, and another road connects No. 5 in-phase end pins of LF353 through resistance R26.No. 2 pins are inverting input, through resistance R22 ground connection.No. 1 output end signal of LF353 is divided into two-way, one tunnel connects inverting input No. 2 pins through diode D6, another road connects the negative electrode of diode D7, the anode output signal of D7 is divided into two-way, one tunnel connects inverting input No. 2 pins through feedback resistance R24, and another road connects inverting input No. 6 end of oppisite phase pins through resistance R25, and No. 1 output end signal of LF353 is divided into two-way, one tunnel connects inverting input No. 6 pins through feedback resistance R27, and another road directly connects the ADCIN01 pin of master controller DSP.Gather the signal circuit of C phase with A phase.
the circuit gathering B phase is similar with the circuit gathering A, C two-phase, difference is that the signal gathering B phase comes from A, C two-phase, A, C two phase signals enter inverting input No. 6 pins of LF353 through resistance R28, R29 superposition respectively, in-phase end No. 5 pins are through resistance R30 ground connection, output No. 7 pins are except connecing inverting input No. 6 pins through feedback resistance R31, its output is just as the input signal of B phase, and other connected mode same A, C phase precise rectification circuit is identical.
6th step scheme: current foldback circuit is specifically implemented as shown in Figure 6.From the current signal of the current Hall transducer of brachium pontis under converter main circuit first through R41 resistance coating-forming voltage signal, this signal connects 8 pin of 555 timers again after R40 and C10 capacitance-resistance filter, be connected in series a small resistor R39 to be connected with 4 pin of 555 timers with power supply simultaneously, an adjustable resistance RP is connected between power supply with ground, the adjustable end of RP connects high-triggering end 6 pin of 555 timers, and resistance R38 is attempted by between power supply and ground after connecting with hand switch SB.The ungrounded end of SB connects low triggering end 2 pin of 555 timers.The direct ground connection of 1 pin of 555 timers, output 3 pin connects the PDPINTA pin of main control chip DSP after the capacitance-resistance filter that R42 and C11 is formed.
7th step scheme: overheating protection circuit is specifically implemented as shown in Figure 7.Temperature switch is pasted onto on power tube fin; one termination+5V power supply; the anode of another terminating diode D10; the negative electrode of D10 is after R43 and C12 capacitance-resistance filter; 1 pin of serial connection photoelectrical coupler TLP521; shunt-wound capacitance C13 between 3 pin of TLP521 and ground, 3 pin, as output, connect the IOPF5 pin of master controller DSP as temperature protection signal after pull-up resistor R44.
Claims (2)
1. an X in brushless DC motor control device; its composition comprises: switch power module, is characterized in that: described switch power module is connected with constant current chopper circuit, Hall testing circuit with precise rectification circuit, overheating protection circuit, current acquisition with current foldback circuit, current acquisition with converter main circuit, power driving circuit, current acquisition with master controller DSP, keyboard-display circuit, EMI respectively.
2. X in brushless DC motor control device according to claim 1, it is characterized in that: described master controller DSP respectively with current acquisition and current foldback circuit, current acquisition and precise rectification circuit, power driving circuit, keyboard-display circuit, overheating protection circuit, Hall testing circuit connects, described power driving circuit respectively with EMI and converter main circuit, current acquisition is connected with constant current chopper circuit, described overheating protection circuit is connected with converter main circuit with EMI, described EMI and converter main circuit respectively with current acquisition and current foldback circuit, current acquisition and constant current chopper circuital current gather and precise rectification circuit, brushless electric machine connects, described Hall testing circuit is connected with brushless electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520423019.7U CN204707064U (en) | 2015-06-18 | 2015-06-18 | X in brushless DC motor control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520423019.7U CN204707064U (en) | 2015-06-18 | 2015-06-18 | X in brushless DC motor control device |
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| CN204707064U true CN204707064U (en) | 2015-10-14 |
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| CN201520423019.7U Expired - Fee Related CN204707064U (en) | 2015-06-18 | 2015-06-18 | X in brushless DC motor control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065621A (en) * | 2017-05-23 | 2017-08-18 | 天津通卓机器人有限公司 | A kind of supporting power supply for motor of being polished for high frequency |
| CN108036517A (en) * | 2018-01-02 | 2018-05-15 | 成都前锋电子有限责任公司 | Gas instantaneous water heater wind turbine invariable power automatic control system and method |
| TWI699961B (en) * | 2019-08-30 | 2020-07-21 | 茂達電子股份有限公司 | Motor driving circuit and method thereof |
-
2015
- 2015-06-18 CN CN201520423019.7U patent/CN204707064U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065621A (en) * | 2017-05-23 | 2017-08-18 | 天津通卓机器人有限公司 | A kind of supporting power supply for motor of being polished for high frequency |
| CN108036517A (en) * | 2018-01-02 | 2018-05-15 | 成都前锋电子有限责任公司 | Gas instantaneous water heater wind turbine invariable power automatic control system and method |
| CN108036517B (en) * | 2018-01-02 | 2023-10-03 | 成都前锋电子有限责任公司 | Constant-power automatic control system and method for fan of gas rapid water heater |
| TWI699961B (en) * | 2019-08-30 | 2020-07-21 | 茂達電子股份有限公司 | Motor driving circuit and method thereof |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 Termination date: 20160618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |