CN105099287A - Remote speed regulation device of direct current brushless motor - Google Patents
Remote speed regulation device of direct current brushless motor Download PDFInfo
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- CN105099287A CN105099287A CN201510386993.5A CN201510386993A CN105099287A CN 105099287 A CN105099287 A CN 105099287A CN 201510386993 A CN201510386993 A CN 201510386993A CN 105099287 A CN105099287 A CN 105099287A
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Abstract
A remote speed regulation device of a direct current brushless motor comprises a rectification control unit and a speed regulation unit, wherein the rectification control unit comprises a transformer, a control power supply module, a controlled rectification module, a zero-cross detection module, a singlechip control module, a trigger control module and a speed given module and is used for inputting a single-phase 220V alternating current power supply, outputting a controlled rectification voltage with an output voltage valid value less than 220V, and sending a speed control signal composed of a guide wave and a data wave in the controlled rectification voltage; and the speed regulation unit comprises a regulation power supply module, a waveform sampling module, a singlechip regulation module and a motor driving module and is used for controlling the speed of the direct current brushless motor according to the speed control signal in the controlled rectification voltage. In the device, a remote controller is not needed, a control line is unnecessarily and independently laid, a single-phase power line is directly used for transmitting the speed control signal, and remote control and regulation on the speed of the direct current brushless motor can be achieved.
Description
Technical field
The present invention relates to a kind of electric machine speed regulation technology, the remote speed regulating device of especially a kind of DC brushless motor.
Background technology
Need to carry out Long-distance Control with when regulating to the speed of DC brushless motor, usual way has:
One is adopt remote controller to control.The Drive and Control Circuit of DC brushless motor is equipped with remote-receiver, can carry out step speed regulation or stepless speed regulation by remote controller to DC brushless motor, and its shortcoming needs to be equipped with remote controller, and management trouble, remote controller is also easily lost.
Two is adopt digital control technology.Such as, the speed of RS-485 bus to DC brushless motor is adopted to control.Program advanced technology, but cost is high, and system, except power line laid by needs, also needs to lay digital control bus.
Three is adopt analog signal control technology.Such as, adopt long-range potentiometer to carry out speeds control, cost is lower.But the method needs to increase control line equally, and antijamming capability is poor.
Summary of the invention
Object of the present invention aims to provide a kind of when not increasing control signal wire and not using a teleswitch, and utilizes single phase poaer supply line to realize the remote speed regulating device of DC brushless motor.
For achieving the above object, the technical scheme that the present invention takes is:
The remote speed regulating device of a kind of DC brushless motor, are made up of Commutation control unit and speed regulation unit.
Described Commutation control unit is provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal; Described phase line input terminal, zero line input terminal input single-phase 220V AC power; Described first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal export controlled rectification voltage.
Described speed regulation unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described first controlled rectification input terminal, the second controlled rectification input terminal are connected to the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal of Commutation control unit respectively.
Described Commutation control unit is made up of transformer, control power module, controllable rectifier module, zero passage detection module, single chip control module, trigger control module, speed preset module.
Two input terminals of described transformer are respectively phase line input terminal, zero line input terminal, and two lead-out terminals are respectively the first ac terminal, the second ac terminal; Described first ac terminal, the second ac terminal export the second AC power.
Described control power module, by controlling power supply single-phase rectification bridge and the first filter regulator circuit forms, exports the first DC supply; Two ac input ends of described control power supply single-phase rectification bridge are connected to the first ac terminal, the second ac terminal respectively; The rectification negative polarity end of described control power supply single-phase rectification bridge is publicly.
Described controllable rectifier module is made up of rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, bidirectional thyristor V4; 2 ac input ends of described rectifier bridge UR1 are connected to the first ac terminal and the second ac terminal respectively, and rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification exports the second plate that negative terminal is connected to bidirectional thyristor V4; The first controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3; The second plate of bidirectional thyristor V1 is connected to the first ac terminal; The second controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V2 is in parallel with the first anode of bidirectional thyristor V4; The second plate of bidirectional thyristor V2 is connected to the second ac terminal.
Described trigger control module is provided with and exchanges control input end, rectify control input; When the AC controling signal of described interchange control input end input is effective, triggering and conducting when trigger control module control bidirectional thyristor V1 and bidirectional thyristor V2 zero passage; When the AC controling signal of described interchange control input end input is invalid, trigger control module is ended after controlling bidirectional thyristor V1 and bidirectional thyristor V2 zero passage; When the rectify control signal of described rectify control input input is effective, triggering and conducting when trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passage; During the rectify control invalidating signal that described rectify control input inputs, trigger control module is ended after controlling bidirectional thyristor V3 and bidirectional thyristor V4 zero passage.
Described zero passage detection module is provided with zero passage voltage input, zero-crossing pulse output; Described zero passage voltage input is connected to the first ac terminal; The zero-crossing pulse that described zero-crossing pulse output exports is positive pulse; Described zero-crossing pulse is corresponding with the second AC power positive half wave; The width of described zero-crossing pulse is less than the second AC power positive half wave width; Described second AC power positive half wave is the second AC power half-wave of the first ac terminal current potential higher than the second ac terminal current potential.
Described speed preset module is provided with speed preset signal output part.
Described single chip control module includes speed preset signal input part, signal acquisition input and two-way level signal output; Described speed preset signal input part is connected to the speed preset signal output part of speed preset module; Described signal acquisition input is connected to the zero-crossing pulse output of zero passage detection module; Described two-way level signal output is respectively and exchanges control output end, rectify control output; Described interchange control output end, rectify control output are connected to interchange control input end, the rectify control input of trigger control module respectively.
Described speed regulation unit forms by regulating power module, waveform sampling module, single-chip microcomputer adjustment module, motor drive module.
Described adjustment power module inputs controlled rectification voltage, exports the second DC supply, is made up of adjustment power supply single-phase rectification bridge and the second filter regulator circuit; The rectification negative polarity end of described adjustment power supply single-phase rectification bridge is with reference to ground.
Described waveform sampling module is provided with sampling Waveform Input end and sampling pulse output; Described sampling Waveform Input end is connected to the second controlled rectification input terminal; Described waveform sampling module is detected higher than the waveform of the first controlled rectification input terminal current potential by the second controlled rectification input terminal current potential and amplitude limit obtains sampling pulse; The positive pulse of described sampling pulse is corresponding higher than the waveform of the first controlled rectification input terminal current potential with the second controlled rectification input terminal current potential.
Described single-chip microcomputer adjustment module has seizure input and speed regulation output end, control for brake output; The seizure input of single-chip microcomputer adjustment module is connected to the sampling pulse output of waveform sampling module.
Described motor drive module is for driving DC brushless motor, and the speed that is provided with regulates input, control for brake input; Described speed regulates input to be connected to the speed regulation output end of single-chip microcomputer adjustment module, and control for brake input is connected to the control for brake output of single-chip microcomputer adjustment module.
Described Commutation control unit carrys out transmission speed control signal by controlling controlled rectification voltage, and speed control signal is made up of guide wave and data wave.
Described speed regulation unit inbound pacing control signal also regulates DC brushless motor speed.
Described zero passage detection module is made up of diode D1, resistance R9, voltage-stabiliser tube DW1, is provided with zero passage voltage input, zero-crossing pulse output; The two ends of resistance R9 are connected to diode D1 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively; Diode D1 anode is zero passage voltage input, is connected to the first ac terminal; Voltage-stabiliser tube DW1 anode is connected to publicly; Voltage-stabiliser tube DW1 negative electrode is zero-crossing pulse output.
Described waveform sampling module is provided with sampling Waveform Input end and sampling pulse output, is made up of diode D2, resistance R12, voltage-stabiliser tube DW2; The two ends of resistance R12 are connected to diode D2 negative electrode and voltage-stabiliser tube DW2 negative electrode respectively; Diode D2 anode is sampling Waveform Input end, is connected to the second controlled rectification input terminal; Voltage-stabiliser tube DW2 anode is connected to reference to ground; Voltage-stabiliser tube DW2 negative electrode is sampling pulse output.
Described speed preset module includes potentiometer.Described speed preset module also includes direction switch.
Described speed preset module is also provided with direction Setting signal output; Described single chip control module also includes direction Setting signal input; Described direction Setting signal output is connected to direction Setting signal input.Described single-chip microcomputer adjustment module also has direction controlling output; Described motor drive module is also provided with direction controlling input; Described direction controlling input is connected to direction controlling output.
The speed of described motor drive module regulates the input signal of input to be pwm pulse or analog voltage.
The invention has the beneficial effects as follows, adopt power line far distance controlled DC brushless motor speed, without the need to remote controller, without the need to control line; DC brushless motor speed can be divided into multiple grade as required; Adopt rectified wave transfer rate control signal, its effective value is identical with waves AC, the instability of power supply when DC brushless motor speed can not be caused to regulate.
Accompanying drawing explanation
Fig. 1 is circuit system structure block diagram;
Fig. 2 is Commutation control unit structure chart.
Fig. 3 is controllable rectifier module embodiment circuit diagram.
Fig. 4 is trigger control module embodiment circuit diagram.
Fig. 5 is control section embodiment circuit diagram in Commutation control unit.
Fig. 6 is embodiment transmission speed grade waveform schematic diagram when being the speed control signal of speed 15.
Fig. 7 is speed control signal sending method.
Fig. 8 is speed regulation unit structure chart.
Fig. 9 is speed regulation unit adjustment portion embodiment circuit diagram.
Figure 10 is motor drive module embodiment 1 circuit diagram.
Figure 11 is motor drive module embodiment 2 circuit diagram.
Figure 12 is that speed receives and control method.
Embodiment
Below by accompanying drawing, also the present invention is described in further detail in conjunction with the embodiments, but embodiments of the present invention are not limited thereto.
The circuit system structure block diagram realizing the inventive method as shown in Figure 1, is made up of Commutation control unit and speed regulation unit.Commutation control unit, by phase line input terminal L, zero line input terminal N input single-phase 220V AC power, exports controlled rectification voltage by the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2.Speed regulation unit is inputted controlled rectification voltage by the first controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 and is controlled DC brushless motor speed.
The structure of Commutation control unit as shown in Figure 2, is made up of transformer, control power module, controllable rectifier module, zero passage detection module, single chip control module, trigger control module, speed preset module.
Two input terminals of transformer are respectively phase line input terminal L, zero line input terminal N, and two lead-out terminals are respectively the first ac terminal L1, the second ac terminal N1.First ac terminal L1, the second ac terminal N1 export the second AC power.The voltage effective value of the single-phase 220V AC power that the voltage effective value of the second AC power inputs lower than Commutation control unit.
The embodiment of controllable rectifier module as shown in Figure 3, is made up of rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, bidirectional thyristor V4.2 ac input ends of rectifier bridge UR1 are connected to the first ac terminal L1 and the second ac terminal N1 respectively, and rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification exports the second plate that negative terminal is connected to bidirectional thyristor V4; The first controlled rectification lead-out terminal AC1 is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3; The second plate of bidirectional thyristor V1 is connected to the first ac terminal L1; The second controlled rectification lead-out terminal AC2 is connected to after the first anode of bidirectional thyristor V2 is in parallel with the first anode of bidirectional thyristor V4; The second plate of bidirectional thyristor V2 is connected to the second ac terminal N1.
The trigger impulse of bidirectional thyristor V1 controls pole K11 and first anode K12 from it and inputs, the trigger impulse of bidirectional thyristor V2 controls pole K21 and first anode K22 from it and inputs, the trigger impulse of bidirectional thyristor V3 controls pole K31 and first anode K32 from it and inputs, and the trigger impulse of bidirectional thyristor V4 controls pole K41 and first anode K42 from it and inputs.
Rectifier bridge UR1 adopts single-phase rectification bridge stack, or adopts 4 diode composition single-phase rectification bridges to replace.
Trigger control module is the circuit meeting following functions: be provided with and exchange control input end, rectify control input; When the AC controling signal of interchange control input end input is effective, triggering and conducting when trigger control module control bidirectional thyristor V1 and bidirectional thyristor V2 zero passage; When the AC controling signal of interchange control input end input is invalid, trigger control module is ended after controlling bidirectional thyristor V1 and bidirectional thyristor V2 zero passage; When the rectify control signal of rectify control input input is effective, triggering and conducting when trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passage; During the rectify control invalidating signal that rectify control input inputs, trigger control module is ended after controlling bidirectional thyristor V3 and bidirectional thyristor V4 zero passage.
The embodiment of trigger control module as shown in Figure 4, is made up of zero cross fired optocoupler U1-U4 and input current-limiting resistance R1-R4, output current limiting resistance R5-R8, is provided with and exchanges control input end KJ, rectify control input KZ.The inside of zero cross fired optocoupler U1-U4 includes input light-emitting diode, exports optical controlled bidirectional thyrister, and zero-cross triggering circuit.The model of zero cross fired optocoupler U1-U4 is selected in MOC3041, MOC3042, MOC3043, MOC3061, MOC3062, MOC3063.
Input current-limiting resistance R1 connects with the input light-emitting diode of zero cross fired optocoupler U1, and series circuit is connected in parallel to the first DC supply VDD1 again and exchanges control input end KJ.Input current-limiting resistance R1 is connected on the input light-emitting diodes tube anode of zero cross fired optocoupler U1, as shown in Figure 4; Input current-limiting resistance R1 also can be connected on the negative electrode of the input light-emitting diode of zero cross fired optocoupler U1.
Input current-limiting resistance R2 connects with the input light-emitting diode of zero cross fired optocoupler U2, and series circuit is connected in parallel to the first DC supply VDD1 again and exchanges control input end KJ.Input current-limiting resistance R3 connects with the input light-emitting diode of zero cross fired optocoupler U3, and series circuit is connected in parallel to the first DC supply VDD1 and rectify control input KZ again.Input current-limiting resistance R4 connects with the input light-emitting diode of zero cross fired optocoupler U4, and series circuit is connected in parallel to the first DC supply VDD1 and rectify control input KZ again.Input current-limiting resistance R2-R4 can be connected on the input light-emitting diodes tube anode of corresponding zero cross fired optocoupler, as shown in Figure 4; Also the input light-emitting diodes tube cathode of corresponding zero cross fired optocoupler can be connected on.
Output current limiting resistance R5 exports with zero cross fired optocoupler U1 inside the control pole K11 and the first anode K12 that are connected in parallel to bidirectional thyristor V1 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R6 exports with zero cross fired optocoupler U2 inside the control pole K21 and the first anode K22 that are connected in parallel to bidirectional thyristor V2 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R7 exports with zero cross fired optocoupler U3 inside the control pole K31 and the first anode K32 that are connected in parallel to bidirectional thyristor V3 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R8 exports with zero cross fired optocoupler U4 inside the control pole K41 and the first anode K42 that are connected in parallel to bidirectional thyristor V4 after optical controlled bidirectional thyrister is connected again.
In Commutation control unit, control section comprises control power module, zero passage detection module, single chip control module, speed preset module, and embodiment circuit as shown in Figure 5.
Controlling power module and be input as the second AC power, exporting the first DC supply VDD1 for providing to Commutation control unit.In Fig. 5 embodiment, control power module and be made up of diode D01, diode D02, diode D03, diode D04, electric capacity C1, three terminal regulator U5.Diode D01, diode D02, diode D03, diode D04 composition control power supply single-phase rectification bridge; Electric capacity C1 is connected in parallel on the DC voltage output end controlling power supply single-phase rectification bridge, strobes; Three terminal regulator U5 input VIN is connected to the rectification positive ends controlling power supply single-phase rectification bridge; First DC supply VDD1 exports from three terminal regulator U5 output VOUT.The rectification negative polarity end controlling power supply single-phase rectification bridge is publicly.Three terminal regulator U5 selects H7133.
Control power module and can also adopt other implementations.The control power supply single-phase rectification bridge of diode D01, diode D02, diode D03, diode D04 composition can replace with single-phase rectification bridge stack, and three terminal regulator U5 can adopt voltage-stabiliser tube voltage stabilizing circuit or DC/DC pressurizer.
Zero passage detection module is the circuit with following functions: be provided with zero passage voltage input, zero-crossing pulse output; Zero passage voltage input is connected to the first ac terminal; The zero-crossing pulse that zero-crossing pulse output exports is positive pulse; Zero-crossing pulse is corresponding with the second AC power positive half wave; The width of zero-crossing pulse is less than the second AC power positive half wave width; Second AC power positive half wave is the second AC power half-wave of the first ac terminal current potential higher than the second ac terminal current potential.
In Fig. 5 embodiment, zero passage detection module is detection shaping circuit, is made up of diode D1, resistance R9, voltage-stabiliser tube DW1.The two ends of resistance R9 are connected to diode D1 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively, and diode D1 anode is connected to the first ac terminal L1, and voltage-stabiliser tube DW1 anode is connected to publicly.Voltage-stabiliser tube DW1 negative electrode is the zero-crossing pulse output exporting zero-crossing pulse.
Speed preset module is provided with speed preset signal output part and direction Setting signal output, speed preset signal output part output speed Setting signal, direction Setting signal output outbound course Setting signal.In Fig. 5 embodiment, speed preset module adopts potentiometer RW1 to carry out dividing potential drop to the first DC supply VDD1, and the speed preset signal obtained is speed preset voltage.The speed preset average voltage that potentiometer RW1 exports is divided into
nindividual interval, the speed class of minimum voltage overall travel speed Setting signal is speed 1, and the speed class of ceiling voltage overall travel speed Setting signal is speed
n; Speed preset voltage
nindividual interval respectively with the speed 1-of speed class
ncorresponding;
nfor being more than or equal to the integer of 2.Speed preset module also can adopt other devices such as rotary encoder, toggle switch, pulse potential device to realize.In Fig. 5 embodiment, speed preset module adopts direction switch SWD outbound course Setting signal, and publicly, one end is direction Setting signal output to a termination of direction switch SWD in addition.
Single chip control module includes 1 road speed preset signal input part, 1 direction, tunnel Setting signal input, 1 road signal acquisition input, 2 tunnel level signal outputs.1 road speed preset signal input part is connected to the speed preset signal output part of speed preset module; 1 direction, tunnel Setting signal input is connected to the direction Setting signal output of speed preset module; 1 road signal acquisition input is connected to the zero-crossing pulse output of zero passage detection module, input zero-crossing pulse; 2 tunnel level signal outputs, for exchanging control output end KJ, rectify control output KZ, are connected to the interchange control input end KJ of trigger control module, rectify control input KZ respectively.
In Fig. 5 embodiment, single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1, and the model of single-chip microprocessor MCU 1 is MSP430G2553.The analog voltage input A0(P1.0 of single-chip microprocessor MCU 1) be speed preset signal input part, the output voltage of potentiometer RW1 is connected to the analog voltage input A0(P1.0 of single-chip microprocessor MCU 1).If adopt other devices to send the speed preset signal of switching value, digital quantity form, can input from the I/O mouth of single-chip microprocessor MCU 1.Single-chip microprocessor MCU 1 carries out A/D conversion by the speed preset voltage inputted analog voltage input A0, or reads the input signal of I/O mouth, obtains the speed class of speed preset signal.The P2.0 of single-chip microprocessor MCU 1 is signal acquisition input, is connected to the zero-crossing pulse output of zero passage detection module.The P1.3 of single-chip microprocessor MCU 1 is direction Setting signal input, is connected to the direction Setting signal output of speed preset module.P1.1, P1.2 of single-chip microprocessor MCU 1 are level signal outputs, and wherein P1.1 is interchange control output end KJ, P1.2 is rectify control output KZ; Exchange interchange control input end KJ, rectify control input KZ that control output end KJ, rectify control output KZ are connected to trigger control module respectively.
First controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 of Commutation control unit export controlled rectification voltage, Commutation control unit carrys out transmission speed control signal by controlling controlled rectification voltage, and speed control signal is made up of guide wave and data wave.The effective value of controlled rectification voltage is identical with the voltage effective value of the second AC power.
Described speed control signal has speed 1-
n, altogether
nindividual speed class.
Described guide wave by
ythe waves AC composition of-2 power frequency period rectified wave and 2 power frequency periods, rectified wave is front, and waves AC is rear;
yfor being more than or equal to the integer of 3.
Described data wave is
xthe controlled rectification voltage wave of individual power frequency period,
xfor being more than or equal to the integer of 2.Described speed control signal has speed 1-
n, altogether
nindividual speed class; The speed 1-of speed control signal speed class
nwith the speed 1-of speed preset signal speed grade
nbetween one_to_one corresponding.The DC brushless motor state of speed 1 correspondence of speed class is on-position.
xin the controlled rectification voltage wave of individual power frequency period, 1 corresponding 1 bit data code of power frequency period,
xthe controlled rectification voltage wave of individual power frequency period is corresponding
xbit data code; In each power frequency period, when its controlled rectification voltage wave is waves AC, 1 corresponding bit data code is 0; In each power frequency period, when its controlled rectification voltage wave is rectified wave, 1 corresponding bit data code is 1.Or
xin the controlled rectification voltage wave of individual power frequency period, 1 corresponding 1 bit data code of power frequency period; In each power frequency period, when its controlled rectification voltage wave is waves AC, 1 corresponding bit data code is 1; In each power frequency period, when its controlled rectification voltage wave is rectified wave, 1 corresponding bit data code is 0.
Described
xbit data code comprises
x-1 bit rate code and 1 direction code, now
nwith
xbetween pass be:
nbe less than or equal to 2
x-1
.During composition numeric data code,
x-1 bit rate code is front, and 1 direction code is rear.Speed code is determined by speed preset signal, and direction code is determined by direction Setting signal.
Described numeric data code, speed code and direction code are binary code.
During Commutation control unit transmission speed control signal, waveform embodiment as shown in Figure 6.In embodiment illustrated in fig. 6
yequal 3,
xequal 6, speed control signal has speed 1-32, totally 32 speed class.
The speed control signal of to be speed class the be speed 15 that Fig. 6 sends.Fig. 6 (a) is the waveform of controlled rectification voltage, and T1 interval is wherein guide wave, is made up of the rectified wave of 1 power frequency period and the waves AC of 2 power frequency periods.T2 interval is data wave, i.e. the controlled rectification voltage wave of 6 power frequency periods.In the controlled rectification voltage wave of 6 power frequency periods of embodiment, 1 corresponding 1 bit data code of power frequency period; In each power frequency period, when its controlled rectification voltage wave is waves AC, corresponding numeric data code is 0; In each power frequency period, when its controlled rectification voltage wave is rectified wave, corresponding numeric data code is 1; 6 power frequency periods are followed successively by waves AC, rectified wave, rectified wave, rectified wave, waves AC, waves AC, and corresponding 6 bit data codes are 011100.First 5 of 6 bit data codes is speed code, and the scope of speed code is 00000-11111, and the speed class scope of representative is speed 1-32.In data wave embodiment illustrated in fig. 6, corresponding 5 bit data codes are 01110, and the speed class of this speed control signal is speed 15.Last 1 of 6 bit data codes is direction code, and direction code is interval corresponding with T3, and be the waves AC of 1 power frequency period in embodiment, direction code is 0.
x-1 bit rate code and 1 direction code composition numeric data code, can also adopt 1 direction code front,
xthe posterior mode of-1 bit rate code, now, still send the controlled rectification voltage waveform shown in Fig. 6, then the 1st of 6 bit data codes is direction code, and direction code is 0; 5 bit data codes are 11100, and the speed class of the speed control signal of representative is speed 29.
DC brushless motor without the need to controlling party to time, described in
xbit data code forms
xbit rate code, directionless code in numeric data code, now
nwith
xbetween pass be:
nbe less than or equal to 2
x .
The step that single chip control module sends a speed control signal is as follows:
Step 1, waits for, until enter step 2 when receiving the rising edge of zero-crossing pulse;
Step 2, stops exchanging output, starts rectification and exports;
Step 3, to the zero-crossing pulse rising edge counting received, count value reaches
ystep 4 is entered when-2;
Step 4, stops rectification exporting, and starts to exchange to export;
Step 5, to the zero-crossing pulse rising edge counting received, enters step 6 when count value reaches 2;
Step 6, sends the controlled rectification voltage wave of 1 power frequency period;
Step 7, waits for, until enter step 8 when receiving the rising edge of zero-crossing pulse;
Step 8, sends
xforward step 9 to during the controlled rectification voltage wave of individual power frequency period, otherwise return step 6;
Step 9, stops rectification exporting, and starts to exchange to export.
Commutation control unit is not when normal maintenance sends speed control signal state, single chip control module controls to exchange control output end KJ and exports useful signal, rectify control output KZ exports invalid signals, the input LEDs ON of zero cross fired optocoupler U1 and U2, the input light-emitting diode cut-off of zero cross fired optocoupler U3 and U4, bidirectional thyristor V1, bidirectional thyristor V2 conducting, bidirectional thyristor V3, bidirectional thyristor V4 ends, first controlled rectification lead-out terminal AC1, the controlled rectification voltage that second controlled rectification lead-out terminal AC2 exports is alternating voltage.In the embodiment shown in fig. 4, the interchange control output end KJ of single chip control module output, the signal of rectify control output KZ are Low level effective.
The zero-crossing pulse that the module of zero passage detection shown in Fig. 5 exports is corresponding with the positive half wave of the second AC power, and the width of zero-crossing pulse is less than the second AC power positive half wave width.Described second AC power positive half wave is the second AC power half-wave of the first ac terminal current potential higher than the second ac terminal current potential.
Single chip control module enters step 2 after the zero-crossing pulse rising edge corresponding with half-wave in Fig. 61 being detected.Described stopping exchanges and exports, and refer to that controlling to exchange control output end KJ exports invalid signals, from the next zero crossing of the second AC power, bidirectional thyristor V1, bidirectional thyristor V2 end; Described beginning rectification exports, refer to that controlling rectify control output KZ exports useful signal, from the next zero crossing of the second AC power, bidirectional thyristor V3, bidirectional thyristor V4 conducting, the controlled rectification voltage that the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 export is commutating voltage.
Described stopping rectification exporting, and refer to that controlling rectify control output KZ exports invalid signals, from the next zero crossing of the second AC power, bidirectional thyristor V3, bidirectional thyristor V4 end; Described beginning exchanges output, refer to that controlling to exchange control output end KJ exports useful signal, from the next zero crossing of the second AC power, bidirectional thyristor V1, bidirectional thyristor V2 conducting, the controlled rectification voltage that the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 export is alternating voltage.
The described controlled rectification voltage wave sending 1 power frequency period, its method is, judges that the controlled rectification voltage wave needing this power frequency period sent is waves AC or rectified wave, if waves AC, then stops rectification exporting, and starts to exchange to export; If rectified wave, then stop exchanging exporting, start rectification and export.
Each single power frequency period in described controlled rectification voltage wave is waves AC, or rectified wave; The waves AC of single power frequency period is by 1 single phase alternating current power supply positive half wave and 1 negative half wave component of single phase alternating current power supply, and positive half wave is front, and negative half-wave is rear; The rectified wave of single power frequency period is made up of 2 rectified half-waves, and first rectified half-waves is corresponding with the second AC power positive half wave, and it is corresponding that second rectified half-waves and the second AC power bear half-wave.The time of described power frequency period is 20ms.Described single power frequency period is 1 power frequency period.
The method of Commutation control unit transmission speed control signal as shown in Figure 7, comprising:
Steps A, reads Setting signal;
Step B, sends a speed control signal;
Step C, judges whether speed changes, and speed changes, and returns step B; Speed does not change, and returns step C.
Judge that the method whether speed changes is, the speed class of speed preset signal changes, or direction Setting signal changes, then speed changes.
The structure of speed regulation unit as shown in Figure 8, is made up of adjustment power module, waveform sampling module, single-chip microcomputer adjustment module, motor drive module.
The adjustment portion of speed regulation unit comprises adjustment power module, waveform sampling module, single-chip microcomputer adjustment module, and embodiment as shown in Figure 9.
Power module is regulated to provide the second DC supply VDD2 for speed regulation unit.In Fig. 9 embodiment, power module is regulated to be made up of diode D05, diode D06, diode D07, diode D08, electric capacity C2, three terminal regulator U6.Diode D05, diode D06, diode D07, diode D08 composition regulates power supply single-phase rectification bridge; Electric capacity C2 is connected in parallel on the DC voltage output end regulating power supply single-phase rectification bridge, strobes; Three terminal regulator U6 input VIN is connected to the rectification positive ends regulating power supply single-phase rectification bridge; Second DC supply VDD2 exports from three terminal regulator U6 output VOUT.The rectification negative polarity end of power supply single-phase rectification bridge is regulated to be with reference to ground.Three terminal regulator U6 selects H7133.
Regulate power module can also adopt other implementations.The adjustment power supply single-phase rectification bridge of diode D05, diode D06, diode D07, diode D08 composition can replace with single-phase rectification bridge stack, and three terminal regulator U6 can adopt voltage-stabiliser tube voltage stabilizing circuit or DC/DC pressurizer.
Waveform sampling module is the circuit with following functions: be provided with sampling Waveform Input end and sampling pulse output; Sampling Waveform Input end is connected to the second controlled rectification input terminal; Waveform sampling module is detected higher than the waveform of the first controlled rectification input terminal current potential by the second controlled rectification input terminal current potential and amplitude limit obtains sampling pulse; The positive pulse of sampling pulse is corresponding higher than the waveform of the first controlled rectification input terminal current potential with the second controlled rectification input terminal current potential.
In Fig. 9 embodiment, waveform sampling module is detection shaping circuit, is made up of diode D2, resistance R12, voltage-stabiliser tube DW2.The two ends of resistance R12 are connected to diode D2 negative electrode and voltage-stabiliser tube DW2 negative electrode respectively; Diode D2 anode is sampling Waveform Input end, is connected to the second controlled rectification input terminal AC2; Voltage-stabiliser tube DW2 anode is connected to reference to ground; Voltage-stabiliser tube DW2 negative electrode is sampling pulse output.
Single-chip microcomputer adjustment module has seizure input and speed regulation output end ADJ, direction controlling output DIR, control for brake output BRAK, catches the sampling pulse output that input is connected to waveform sampling module.The output type of direction controlling output DIR, control for brake output BRAK is switching value; The output type of speed regulation output end ADJ is pwm pulse or analog voltage.
In Fig. 9 embodiment, single-chip microcomputer adjustment module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2, and the model of single-chip microprocessor MCU 2 is MSP430G2553, and the seizure input of single-chip microprocessor MCU 2 is P2.0, speed regulation output end ADJ is P1.2, and output type is pwm pulse; Direction controlling output DIR is P1.4, and control for brake output BRAK is P1.5, P1.4, P1.5 output level control signal.
Motor drive module is for driving DC brushless motor, and the driver for brushless DC motor, the driven by Brush-Less DC motor chip that are provided with pwm pulse speed governing input or analog voltage speed governing input can be applicable to the present invention.Figure 10 shows that the circuit of the embodiment 1 adopting driven by Brush-Less DC motor chip, Figure 11 shows that the circuit of the embodiment 2 adopting driver for brushless DC motor.
In embodiment illustrated in fig. 10, motor drive module is made up of motor drive ic F310, three phase full bridge MOSFET driving chip U7 and diode D31-D34, electric capacity C31-C32, resistance R31-R48, triode V31, potentiometer RW31, thermistor NTC.
In Figure 10 embodiment, diode D31-D34 forms single phase bridge type rectifier circu and carries out rectification to the controlled rectification voltage that the first controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 input, after electric capacity C31 filtering, obtain motor drive power supply U+ again, power to motor drive ic F310, three phase full bridge MOSFET driving chip U7.The negative polarity end of single phase bridge type rectifier circu is connected to reference to ground.
In Figure 10 embodiment, resistance R31, resistance R32, triode V31, electric capacity C32 form pwm pulse/analog voltage change-over circuit, speed regulated the pwm pulse of input ADJ to be converted to analog voltage speed conditioning signal, analog voltage speed conditioning signal is connected to the speed electric input SREF of motor drive ic F310.DC power supply VDD6 is provided by+6V the power output end of motor drive ic F310.If the output type of single-chip microcomputer adjustment module speed regulation output end ADJ is analog voltage, then the speed electric input SREF of motor drive ic F310 is connected directly to speed regulation output end ADJ, without the need to pwm pulse/analog voltage change-over circuit.
In Figure 10 embodiment, driving input HU, LU, HV, LV, HW, LW of three phase full bridge MOSFET driving chip U7 are connected to drive output PWM_HU, PWM_LU, PWM_HV, PWM_LV, PWM_HW, PWM_LW of motor drive ic F310 respectively; Three-phase output end U, V, W of three phase full bridge MOSFET driving chip U7 are connected to the three-phase input end of DC brushless motor M31; The negative supply input V-of three phase full bridge MOSFET driving chip U7 is connected to reference to ground through resistance R39.Sampling voltage on resistance R39 is connected to the sampling current input ITRIP of motor drive ic F310; Current limliting threshold voltage ILIMIT is determined by potentiometer RW31.
In Figure 10 embodiment, RPI voltage is determined by resistance R33, resistance R34, and RPI voltage swing determines the size of electric motor starting electric current; RSF voltage is determined by resistance R35, resistance R36, the size of commutating frequency during RSF voltage swing decision electric motor starting; RSD voltage is determined by resistance R37, resistance R38, and after overcurrent, the time of autoboot is arranged by RSD.
In Figure 10 embodiment, VLIMIT is overtemperature protection reference gate voltage limit, is determined by resistance R41, resistance R42; VTH is input judgement voltage, is determined by resistance R40, thermistor NTC.
In Figure 10 embodiment, resistance R43-R48 forms bleeder circuit collection and holds feedback voltage to detect back electromotive force mutually, and three-phase feedback voltage is connected to feedback input end EMF_U, EMF_V, EMF_W of motor drive ic F310 respectively.
In Figure 10 embodiment, the direction controlling output DIR of single-chip microcomputer adjustment module, control for brake output BRAK are connected to direction controlling input F/R, the braking input RESET of motor drive ic F310 respectively.The braking input RESET of motor drive ic F310 is also known as reseting controling end RESET.
In Figure 10 embodiment, the power end VCC of motor drive ic F310 is connected to motor drive power supply U+, and ground end GND is connected to reference to ground.
In Figure 10 embodiment, DC brushless motor M31 is the DC brushless motor without Hall element.
In embodiment illustrated in fig. 11, motor drive module is made up of brushless motor driver U61 and diode D61-D64, electric capacity C61-C62, resistance R61-R62, triode V61.The model of brushless motor driver U61 is BLD-70.
In Figure 11 embodiment, diode D61-D64 forms single phase bridge type rectifier circu and carries out rectification to the controlled rectification voltage that the first controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 input, after electric capacity C61 filtering, obtain motor drive power supply V+ again, power to brushless motor driver U61.The negative polarity end of single phase bridge type rectifier circu is connected to reference to ground.
In Figure 11 embodiment, resistance R61, resistance R62, triode V61, electric capacity C62 form pwm pulse/analog voltage change-over circuit, speed regulated the pwm pulse of input ADJ to be converted to analog voltage speed conditioning signal, analog voltage speed conditioning signal is connected to the speed electric input SV of brushless motor driver U61.DC power supply VDD62 is by the power output end VCC(+6.25V of brushless motor driver U61) provide.
In Figure 11 embodiment, the three-phase phase terminal U of brshless DC motor M61, V, W are connected to three-phase output end U, V, W of brushless motor driver U61; Hall signal output HU, HV, HW of brshless DC motor M61 are connected to hall signal input HU, HV, HW of brushless motor driver U61; The Hall power supply of brshless DC motor M61 is by the power output end VCC(+6.25V of brushless motor driver U61) provide, power output end VCC, H-that H+ is connected to brushless motor driver U61 are connected to reference to ground.
In Figure 11 embodiment, the direction controlling output DIR of single-chip microcomputer adjustment module, control for brake output BRAK are connected to direction controlling input F/R, the braking input BRK of brushless motor driver U61 respectively.
In Figure 11 embodiment, the power positive end DC+ of brushless motor driver U61 is connected to motor drive power supply V+, and power supply negative terminal DC-is connected to reference to ground.
Speed regulation unit inbound pacing control signal also regulates the speed of DC brushless motor, and its method as shown in figure 12, comprising:
Step one, Electric Machine Control initialization, setting DC brushless motor is on-position;
Step 2, has judged whether speed control signal; There is no speed control signal, return step 2; There is speed control signal, forward step 3 to;
Step 3, inbound pacing control signal;
Step 4, regulates DC brushless motor speed; Return step 2.
When rotating switches, need first to export brake signal by control for brake output BRAK and make motor braking, after end of braking, then from direction controlling output DIR outbound course control signal, realize motor reversal.Directly switch without braking and realize rotating and load current may be caused sharply to increase and damage drive circuit.
The method of DC brushless motor speed is regulated to be, in the speed control signal that single-chip microcomputer adjustment module receives, when direction code does not change, control the speed of DC brushless motor according to the speed class of speed code correspondence; In the speed control signal that single-chip microcomputer adjustment module receives, when direction code changes, first control DC brushless motor braking, then control the speed of DC brushless motor according to the speed class of speed code correspondence.
When regulating the method for DC brushless motor speed, when the speed class that the speed control signal that single-chip microcomputer adjustment module receives is corresponding is grade 1, control DC brushless motor braking.
Judged whether speed control signal, method is judge whether the controlled rectification voltage inputted from the first controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 has guide wave.
Inbound pacing control signal, method receives
xthe controlled rectification voltage wave of individual power frequency period, will
xthe controlled rectification voltage wave of individual power frequency period is converted to
xbit data code.
The function of waveform sampling module carries out detection shaping to controlled rectification voltage.In Fig. 9 embodiment, waveform sampling module is detected lower than the waveform of the second controlled rectification input terminal AC2 by the first controlled rectification input terminal AC1 current potential and amplitude limit obtains sampling pulse, exports the seizure input of single-chip microcomputer adjustment module to; The positive pulse of sampling pulse is corresponding lower than the half-wave of the second controlled rectification input terminal current potential with the first controlled rectification input terminal current potential, and sampling pulse positive pulse width is less than this half band-width.Speed control signal medium velocity grade be the sampling pulse example of speed 15 as shown in Figure 6 (b); When controlled rectification voltage is alternating voltage, sampling pulse be duty ratio be less than 50%, with the square wave of the second AC power same frequency; When controlled rectification voltage is commutating voltage, sampling pulse is low level.
In embodiment illustrated in fig. 6, guide wave is made up of the rectified wave of 1 power frequency period and the waves AC of 2 power frequency periods, the square wave of to be the cycle the be power frequency period of the sampling pulse before guide wave.The rectified wave of 1 power frequency period should make to occur in sampling pulse that width is the low level in 20ms, i.e. 1 power frequency period interval, but in fact guide wave makes to occur in sampling pulse that width is the low level close to 20ms, namely 1.5 power frequency period interval, the interval T4 of low level as shown in Figure 6; The low level in 0.5 the power frequency period interval had more is produced by the positive half wave of the waves AC after immediately; In guide wave, the negative half-wave of the waves AC of the 1st power frequency period makes to occur in sampling pulse that width is the high level in 0.5 power frequency period interval, the interval T5 of high level as shown in Figure 6.
Judge whether controlled rectification voltage has guide wave, method is, judges to exceed after power frequency period square wave in sampling pulse the interval power frequency period number of low level of power frequency period width; If there is power frequency period number to be in sampling pulse
ythe low level of-2 is interval, then have guide wave in controlled rectification voltage; If do not have power frequency period number to be in sampling pulse
ythe low level of-2 is interval, then do not have guide wave in controlled rectification voltage.
The method judging to exceed after power frequency period square wave in sampling pulse the interval power frequency period number of low level of power frequency period width is, width is measured to the low level pulse exceeding power frequency period width after power frequency period square wave in sampling pulse, if measure the low level pulse width exceeding power frequency period width obtained is
w, then the power frequency period number in this low level interval is INT(
w/20); The function of INT function is that fractions omitted part rounds.
Data wave
xin the controlled rectification voltage wave of individual power frequency period, 1 corresponding 1 bit data code of power frequency period, the voltage wave of each power frequency period can be waves AC, also can be rectified wave.When the voltage wave of 1 power frequency period is rectified wave, the sampling pulse corresponding with it is the low level in 1 power frequency period interval; When the voltage wave of 1 power frequency period is waves AC, the sampling pulse corresponding with it is the square wave that 1 duty ratio is less than 50%.In embodiment illustrated in fig. 6, data wave is the controlled rectification voltage wave of continuous 6 power frequency periods, the waves AC that the waves AC that namely interval T6 is corresponding, the rectified wave that interval T7 is corresponding, the rectified wave that interval T8 is corresponding, the rectified wave that interval T9 is corresponding, interval T10 are corresponding and waves AC corresponding to interval T11; 5 bit rate codes are 01110,1 direction code is 0.Speed class is speed 15.
Will
xthe controlled rectification voltage wave of individual power frequency period is converted to
xthe method of bit data code is, after guide wave
xin individual power frequency period interval, when the sampling pulse in 1 power frequency period interval is low level, this bit data code is 1 accordingly, when the sampling pulse in 1 power frequency period interval be 1 duty ratio be less than the square wave of 50% time, this bit data code is 0 accordingly.Or, after guide wave
xin individual power frequency period interval, when the sampling pulse in 1 power frequency period interval is low level, this bit data code is 0 accordingly, when the sampling pulse in 1 power frequency period interval be 1 duty ratio be less than the square wave of 50% time, this bit data code is 1 accordingly.
Speed code is converted to that speed class can use calculating, the method such as to table look-up.In embodiment, the scope of 5 bit rate codes is 00000-11111, and the speed class scope of representative is speed 1-32; When speed code is 00000, speed class is speed 1; When speed code is 00001, speed class is speed 2; When speed code is 00010, speed class is speed 3; By that analogy, when speed code is 11111, speed class is speed 32.
DC brushless motor do not need controlling party to time, speed preset module is without the need to direction Setting signal output, single chip control module is without the need to direction Setting signal input, and single-chip microcomputer adjustment module is without the need to direction controlling output, and motor drive module is without the need to direction controlling input.
Controlled rectification voltage is directly powered to the adjustment power module of speed regulation unit, motor drive module and waveform sampling module, first adjustment power module wherein, motor drive module carry out rectification to controlled rectification voltage, again after capacitor filtering, provide power supply to interlock circuit; When controlled rectification voltage is zero, the source current of adjustment power module, motor drive module is also zero; Waveform sampling module is non-linear resistive load, and when controlled rectification voltage is zero, the source current of waveform sampling module is zero.Therefore, when controlled rectification voltage is zero, it is zero to the source current that speed regulation unit provides.So, Commutation control unit carries out stopping at the zero crossing of the second AC power to exchange output, starts rectification output, or stop rectification export, start exchange export switching time, can the successful change of current between bidirectional thyristor V1, bidirectional thyristor V2 and bidirectional thyristor V3, bidirectional thyristor V4, unlikelyly cause power supply short circuit.
The present invention has following features:
1. power line far distance controlled DC brushless motor speed is adopted, without the need to remote controller, without the need to control line;
2. DC brushless motor speed can be divided into multiple grade as required;
3. adopt rectified wave transfer rate control signal, its effective value is identical with waves AC, the instability of power supply when DC brushless motor speed can not be caused to regulate.
Claims (9)
1. the remote speed regulating device of DC brushless motor, is characterized in that:
Be made up of Commutation control unit and speed regulation unit;
Described Commutation control unit is provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal; Described phase line input terminal, zero line input terminal input single-phase 220V AC power; Described first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal export controlled rectification voltage;
Described speed regulation unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described first controlled rectification input terminal, the second controlled rectification input terminal are connected to the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal of Commutation control unit respectively;
Described Commutation control unit is made up of transformer, control power module, controllable rectifier module, zero passage detection module, single chip control module, trigger control module, speed preset module;
Two input terminals of described transformer are respectively phase line input terminal, zero line input terminal, and two lead-out terminals are respectively the first ac terminal, the second ac terminal; Described first ac terminal, the second ac terminal export the second AC power;
Described control power module, by controlling power supply single-phase rectification bridge and the first filter regulator circuit forms, exports the first DC supply; Two ac input ends of described control power supply single-phase rectification bridge are connected to the first ac terminal, the second ac terminal respectively; The rectification negative polarity end of described control power supply single-phase rectification bridge is publicly;
Described controllable rectifier module is made up of rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, bidirectional thyristor V4; 2 ac input ends of described rectifier bridge UR1 are connected to the first ac terminal and the second ac terminal respectively, and rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification exports the second plate that negative terminal is connected to bidirectional thyristor V4; The first controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3; The second plate of bidirectional thyristor V1 is connected to the first ac terminal; The second controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V2 is in parallel with the first anode of bidirectional thyristor V4; The second plate of bidirectional thyristor V2 is connected to the second ac terminal;
Described trigger control module is provided with and exchanges control input end, rectify control input; When the AC controling signal of described interchange control input end input is effective, triggering and conducting when trigger control module control bidirectional thyristor V1 and bidirectional thyristor V2 zero passage; When the AC controling signal of described interchange control input end input is invalid, trigger control module is ended after controlling bidirectional thyristor V1 and bidirectional thyristor V2 zero passage; When the rectify control signal of described rectify control input input is effective, triggering and conducting when trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passage; During the rectify control invalidating signal that described rectify control input inputs, trigger control module is ended after controlling bidirectional thyristor V3 and bidirectional thyristor V4 zero passage;
Described zero passage detection module is provided with zero passage voltage input, zero-crossing pulse output; Described zero passage voltage input is connected to the first ac terminal; The zero-crossing pulse that described zero-crossing pulse output exports is positive pulse; Described zero-crossing pulse is corresponding with the second AC power positive half wave; The width of described zero-crossing pulse is less than the second AC power positive half wave width; Described second AC power positive half wave is the second AC power half-wave of the first ac terminal current potential higher than the second ac terminal current potential;
Described speed preset module is provided with speed preset signal output part;
Described single chip control module includes speed preset signal input part, signal acquisition input and two-way level signal output; Described speed preset signal input part is connected to the speed preset signal output part of speed preset module; Described signal acquisition input is connected to the zero-crossing pulse output of zero passage detection module; Described two-way level signal output is respectively and exchanges control output end, rectify control output; Described interchange control output end, rectify control output are connected to interchange control input end, the rectify control input of trigger control module respectively;
Described speed regulation unit forms by regulating power module, waveform sampling module, single-chip microcomputer adjustment module, motor drive module;
Described adjustment power module inputs controlled rectification voltage, exports the second DC supply, is made up of adjustment power supply single-phase rectification bridge and the second filter regulator circuit; The rectification negative polarity end of described adjustment power supply single-phase rectification bridge is with reference to ground;
Described waveform sampling module is provided with sampling Waveform Input end and sampling pulse output; Described sampling Waveform Input end is connected to the second controlled rectification input terminal; Described waveform sampling module is detected higher than the waveform of the first controlled rectification input terminal current potential by the second controlled rectification input terminal current potential and amplitude limit obtains sampling pulse; The positive pulse of described sampling pulse is corresponding higher than the waveform of the first controlled rectification input terminal current potential with the second controlled rectification input terminal current potential;
Described single-chip microcomputer adjustment module has seizure input and speed regulation output end, control for brake output; The seizure input of single-chip microcomputer adjustment module is connected to the sampling pulse output of waveform sampling module;
Described motor drive module is for driving DC brushless motor, and the speed that is provided with regulates input, control for brake input; Described speed regulates input to be connected to the speed regulation output end of single-chip microcomputer adjustment module, and control for brake input is connected to the control for brake output of single-chip microcomputer adjustment module;
Described Commutation control unit carrys out transmission speed control signal by controlling controlled rectification voltage, and speed control signal is made up of guide wave and data wave;
Described speed regulation unit inbound pacing control signal also regulates DC brushless motor speed.
2. the remote speed regulating device of DC brushless motor according to claim 1, is characterized in that: described zero passage detection module is made up of diode D1, resistance R9, voltage-stabiliser tube DW1, are provided with zero passage voltage input, zero-crossing pulse output; The two ends of resistance R9 are connected to diode D1 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively; Diode D1 anode is zero passage voltage input, is connected to the first ac terminal; Voltage-stabiliser tube DW1 anode is connected to publicly; Voltage-stabiliser tube DW1 negative electrode is zero-crossing pulse output.
3. the remote speed regulating device of DC brushless motor according to claim 1, is characterized in that: described waveform sampling module is provided with sampling Waveform Input end and sampling pulse output, is made up of diode D2, resistance R12, voltage-stabiliser tube DW2; The two ends of resistance R12 are connected to diode D2 negative electrode and voltage-stabiliser tube DW2 negative electrode respectively; Diode D2 anode is sampling Waveform Input end, is connected to the second controlled rectification input terminal; Voltage-stabiliser tube DW2 anode is connected to reference to ground; Voltage-stabiliser tube DW2 negative electrode is sampling pulse output.
4. the remote speed regulating device of DC brushless motor according to claim 1, is characterized in that: described speed preset module includes potentiometer.
5. the remote speed regulating device of DC brushless motor according to claim 1, is characterized in that: described speed preset module also includes direction switch.
6. the remote speed regulating device of DC brushless motor according to claim 5, is characterized in that: described speed preset module is also provided with direction Setting signal output; Described single chip control module also includes direction Setting signal input; Described direction Setting signal output is connected to direction Setting signal input.
7. the remote speed regulating device of DC brushless motor according to claim 5, is characterized in that: described single-chip microcomputer adjustment module also has direction controlling output; Described motor drive module is also provided with direction controlling input; Described direction controlling input is connected to direction controlling output.
8. the remote speed regulating device of DC brushless motor according to claim 1, is characterized in that: the speed of described motor drive module regulates the input signal of input to be pwm pulse or analog voltage.
9. the remote speed regulating device of DC brushless motor according to claim 1, is characterized in that: described single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1; The model of described single-chip microprocessor MCU 1 is MSP430G2553; Described single-chip microcomputer adjustment module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2; The model of described single-chip microprocessor MCU 2 is MSP430G2553.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107804921A (en) * | 2017-11-24 | 2018-03-16 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy directly drives aerating system |
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| WO2000007289A1 (en) * | 1998-07-31 | 2000-02-10 | S/L Montevideo Technology, Inc. | Brushless dc motor controller with speed control from zero to above base speed |
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| CN107804921B (en) * | 2017-11-24 | 2024-01-26 | 安徽黄河水处理科技股份有限公司 | Solar direct-drive aeration system |
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