CN105048893B - Method for long-distance speed regulation of DC brushless motor - Google Patents
Method for long-distance speed regulation of DC brushless motor Download PDFInfo
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- CN105048893B CN105048893B CN201510386930.XA CN201510386930A CN105048893B CN 105048893 B CN105048893 B CN 105048893B CN 201510386930 A CN201510386930 A CN 201510386930A CN 105048893 B CN105048893 B CN 105048893B
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Abstract
A method for long-distance speed regulation of a DC brushless motor is disclosed. The method is realized by an apparatus formed by a rectification control unit and a speed regulation unit. The rectification control unit inputs single-phase 220V AC power, outputs controllable rectified voltage after pressure reduction by a transformer, and speed control signals containing motor operation direction and operation speed level are sent in the controllable rectified voltage. The speed control signals comprise guiding waves including multiple power frequency period rectified waves and one power frequency period AC wave and data waves formed by multiple power frequency periods. The speed regulation unit inputs controllable rectified voltage containing speed control signals, and controls the speed of the DC brushless motor. No remote controller is not needed, and no control lines have to laid individually. Speed control signals can be directly transmitted through a single-phase power line, long-distance controlling and adjusting the speed of the DC brushless motor can be realized.
Description
Technical field
The present invention relates to a kind of electric machine speed regulation technology, the especially a kind of method of the remote speed governing of DC brushless motor.
Background technology
When needing the speed to DC brushless motor to carry out remotely control with adjusting, usual way has：
One is to adopt remote control control.The drive control circuit of DC brushless motor is equipped with remote control device, can be with
Step speed regulation or stepless speed regulation are carried out to DC brushless motor by remote control, it has the disadvantage to need to be equipped with remote control, pipe
Reason trouble, remote control is also easy to lose.
Two is to adopt digital control technology.For example, the speed of DC brushless motor is controlled using RS-485 buses
System.Program advanced technology, but high cost, system is in addition to needing to lay electric lines of force, in addition it is also necessary to lay digital control bus.
Three is using analogue signal control technology.For example, speed controlling is carried out using long-range potentiometer, cost is relatively low.But
The method needs also exist for increasing control line, and capacity of resisting disturbance is poor.
The content of the invention
The purpose of the present invention aims to provide one kind in the case where not increasing control signal wire and not using remote control, utilizes
The method that single phase poaer supply line realizes the remote speed governing of DC brushless motor.
To reach above-mentioned purpose, the present invention is adopted the technical scheme that：
A kind of method of the remote speed governing of DC brushless motor, the dress being made up of Commutation control unit and speed regulation unit
Put realization.
The Commutation control unit be provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal,
Two controlled rectification lead-out terminals；The phase line input terminal, zero line input terminal input single-phase 220V alternating current power supplys；Described first
Controlled rectification lead-out terminal, the second controlled rectification lead-out terminal output controlled rectification voltage.
The speed regulation unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described
The first controlled rectification that one controlled rectification input terminal, the second controlled rectification input terminal are respectively connecting to Commutation control unit is defeated
Go out terminal, the second controlled rectification lead-out terminal.
The Commutation control unit is by transformator, control power module, controllable rectifier module, zero passage detection module, monolithic
Machine control module, trigger control module, speed preset module composition.
Two input terminals of the transformator are respectively phase line input terminal, zero line input terminal, two lead-out terminals
Respectively the first ac terminal, the second ac terminal；First ac terminal, the second ac terminal export the second alternating current
Source.
The control power module is by power supply single-phase rectification bridge is controlled and the first filter regulator circuit is constituted, and output first is straight
Stream working power；It is described control power supply single-phase rectification bridge two ac input ends be respectively connecting to the first ac terminal, second
Ac terminal；The rectification negative polarity end for controlling power supply single-phase rectification bridge is for publicly.The first of control power module output
DC supply to single chip control module is powered.
The controllable rectifier module is by rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, double
To IGCT V4 compositions；2 ac input ends of the rectifier bridge UR1 are respectively connecting to the first ac terminal and the second exchange end
Son, rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification output negative terminal is connected to bidirectional thyristor V4's
Second plate；It is controllable whole first to be connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3
Stream lead-out terminal；The second plate of bidirectional thyristor V1 is connected to the first ac terminal；The first anode of bidirectional thyristor V2 with
The second controlled rectification lead-out terminal is connected to after the first anode parallel connection of bidirectional thyristor V4；The second plate of bidirectional thyristor V2
It is connected to the second ac terminal.
The trigger control module is provided with exchange control signal, rectification control signal；The exchange control signal
When the AC controling signal of input is effective, trigger when trigger control module control bidirectional thyristor V1 and bidirectional thyristor V2 zero passages
Conducting；When the AC controling signal of the exchange control signal input is invalid, trigger control module control bidirectional thyristor V1
End with after bidirectional thyristor V2 zero passages；When the rectification control signal of the rectification control signal input is effective, triggering control
Module controls triggering and conducting when bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；The rectification of the rectification control signal input
When control signal is invalid, end after trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passages.
The zero passage detection module is provided with zero passage voltage input, zero-crossing pulse outfan；The zero passage voltage input
It is connected to the first ac terminal；The zero-crossing pulse of the zero-crossing pulse outfan output is positive pulse；The zero-crossing pulse and
Two alternating current power supply positive half-waves correspondence；The width of the zero-crossing pulse is less than the second alternating current power supply positive half-wave width；Described second hands over
Stream power supply positive half-wave is second alternating current power supply half-wave of the first ac terminal current potential higher than the second ac terminal current potential.
The speed preset module is provided with speed preset signal output part and direction Setting signal outfan.
The single chip control module includes speed preset signal input part, direction Setting signal input, catches letter
Number input and two-way level signal outfan；The speed preset signal input part be connected to the speed of speed preset module to
Determine signal output part；The direction Setting signal input is connected to the direction Setting signal outfan of speed preset module；Institute
State the zero-crossing pulse outfan that signal acquisition input is connected to zero passage detection module；The two-way level signal outfan difference
To exchange control output end, rectification control output end；The exchange control output end, rectification control output end are respectively connecting to touch
Send out exchange control signal, the rectification control signal of control module.
The speed regulation unit is by regulation power supply module, waveform sampling module, single-chip microcomputer adjustment module, Motor drive mould
Block is constituted.
The regulation power supply module input controlled rectification voltage, the second DC supply of output, it is single-phase by regulation power supply
Rectifier bridge and the second filter regulator circuit are constituted；The rectification negative polarity end of the regulation power supply single-phase rectification bridge is reference ground.Adjust
Second DC supply of economize on electricity source module output is powered to single-chip microcomputer adjustment module.
The waveform sampling module is provided with sampling Waveform Input end and sampling pulse outfan；The sampling Waveform Input end
It is connected to the second controlled rectification input terminal；Second controlled rectification input terminal current potential is higher than first by the waveform sampling module
Simultaneously amplitude limit obtains sampling pulse for the waveform detection of controlled rectification input terminal current potential；The positive pulse of the sampling pulse and second can
Control rectification input terminal current potential is corresponding higher than the waveform of the first controlled rectification input terminal current potential.
There is the single-chip microcomputer adjustment module seizure input and speed to adjust outfan, direction controlling outfan, braking
Control output end；The seizure input of single-chip microcomputer adjustment module is connected to the sampling pulse outfan of waveform sampling module.
The motor drive module is used to drive DC brushless motor, is provided with speed and adjusts input, direction controlling input
End, control for brake input；The speed adjusts the speed regulation outfan that input is connected to single-chip microcomputer adjustment module, direction
Control signal is connected to the direction controlling outfan of single-chip microcomputer adjustment module, and control for brake input is connected to single-chip microcomputer regulation
The control for brake outfan of module.
The Commutation control unit by controlling controlled rectification voltage come transmission speed control signal, speed control signal by
Guide wave and data wave component.
The guide wave exchanges wave component by rectified wave and 1 power frequency period of y-1 power frequency period, and rectified wave exists
Before, waves AC is rear；Y is the integer more than or equal to 2.
The data wave is the controlled rectification voltage wave of x power frequency period, and x is the integer more than or equal to 2.
The speed control signal has speed 1-n, common n speed class；The speed class of the speed preset signal
There is speed 1-n；N is the integer more than or equal to 2.
In the controlled rectification voltage wave of the x power frequency period, 1 power frequency period 1 numeric data code of correspondence；X power frequency week
The controlled rectification voltage wave correspondence x-bit data code of phase.
The x-bit data code includes x-1 bit rates code and 1 direction code；Relation between the n and x is：N is less than
Equal to 2X-1。
The numeric data code, speed code and direction code are binary code.
The single chip control module sends the method for a speed control signal,
Step 1, when waiting until the rising edge for receiving zero-crossing pulse step 2 is entered；
Step 2, stops exchange output, starts rectification output；
Step 3, the zero-crossing pulse rising edge to receiving is counted, and count value enters step 4 when reaching y-1；
Step 4, stops rectification output, starts exchange output；
Step 5, when waiting until the rising edge for receiving zero-crossing pulse step 6 is entered；
Step 6, sends the controlled rectification voltage wave of 1 power frequency period；
Step 7, when waiting until the rising edge for receiving zero-crossing pulse step 8 is entered；
Step 8, has been sent from going to step 9, otherwise return to step 6 during the controlled rectification voltage wave of x power frequency period；
Step 9, stops rectification output, starts exchange output.
The method of the Commutation control unit transmission speed control signal is,
Step A, reads Setting signal；
Step B, sends a speed control signal；
Step C, judges whether speed changes, and speed changes, return to step B；Speed does not change, and returns
Return step C.
The speed regulation unit receives speed control signal and adjusts the method for DC brushless motor speed,
Step one, motor control initialization, sets DC brushless motor as on-position；
Step 2, determines whether speed control signal；Without speed control signal, return to step two；There is speed controlling
Signal, goes to step 3；
Step 3, receives speed control signal；
Step 4, adjusts DC brushless motor speed；Return to step two.
Described to determine whether speed control signal, method is to judge whether there is guide wave in controlled rectification voltage.It is described
The method for judging whether to have in controlled rectification voltage guide wave is to judge to exceed work in sampling pulse after power frequency period square wave
The low level interval power frequency period number of frequency periodic width；If there is the low level that power frequency period number is y-1 interval in sampling pulse,
Then there is guide wave in controlled rectification voltage；It is controllable if interval for the low level of y-1 without power frequency period number in sampling pulse
Without guide wave in commutating voltage.
Low level interval power frequency in the judgement sampling pulse after power frequency period square wave more than power frequency period width
The method of periodicity is that the low level pulse after power frequency period square wave in sampling pulse more than power frequency period width is measured
Width, if the low level pulse width more than power frequency period width that obtains of measurement is W, then the interval power frequency period of the low level
Number is INT (W/20)；The function of INT functions is that fractions omitted part rounds.
The method for receiving speed control signal is that the controlled rectification voltage wave for receiving x power frequency period is converted to x positions
Numeric data code, by x-bit data code speed code and direction code are converted to, and speed code is converted to into the speed class of speed control signal.
The controlled rectification voltage wave for receiving x power frequency period is converted to x-bit data code, and its method is：In guide wave
In x power frequency period interval afterwards, when the interval sampling pulse of 1 power frequency period is low level, the corresponding data
Code is 1, when the interval sampling pulse of 1 power frequency period is square wave of 1 dutycycle less than 50%, the corresponding data
Code is 0；
Its method or：In x power frequency period interval after guide wave, when the sampling that 1 power frequency period is interval
When pulse is low level, the corresponding numeric data code is 0, when the interval sampling pulse of 1 power frequency period is less than for 1 dutycycle
During 50% square wave, the corresponding numeric data code is 1.
It is described to stop exchange output, refer to control exchange control output end output invalid signals；The beginning rectification output,
Refer to control rectification control output end output useful signal；It is described to start exchange output, refer to that control exchange control output end is defeated
Go out useful signal；The stopping rectification output, refers to control rectification control output end output invalid signals.
The method for judging whether speed changes is that the speed class of speed preset signal changes, or
Direction Setting signal changes, then speed changes.
When the speed class of the speed control signal is grade 1, control DC brushless motor braking.
The invention has the beneficial effects as follows, using power line distant control DC brushless motor speed, without the need for remote control, nothing
Need control line；DC brushless motor speed can as needed be divided into multiple grades；Using rectified wave transfer rate control signal,
Its virtual value is identical with waves AC, and power supply is unstable when not resulting in DC brushless motor speed regulation.
Description of the drawings
Fig. 1 is system architecture 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 embodiment circuit diagram in control section in Commutation control unit.
Waveform diagram when Fig. 6 is the speed control signal that embodiment transmission speed grade is speed 15.
Fig. 7 is speed control signal sending method.
Fig. 8 is speed regulation unit structure chart.
Fig. 9 is that speed regulation unit adjusts section Example circuit diagram.
Figure 10 is the circuit diagram of motor drive module embodiment 1.
Figure 11 is the circuit diagram of motor drive module embodiment 2.
Figure 12 is that speed is received and control method.
Specific embodiment
Below by accompanying drawing and in conjunction with the embodiments the present invention is described in further detail, but embodiments of the present invention
Not limited to this.
The system structure of device block diagram of the inventive method is realized as shown in figure 1, adjusting single by Commutation control unit and speed
Unit's composition.Commutation control unit, can by first by phase line input terminal L, zero line input terminal N input single-phase 220V alternating current power supplys
The sub- AC1 of control rectification output end, the second controlled rectification lead-out terminal AC2 output controlled rectification voltages.Speed regulation unit is by first
Controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 are input into controlled rectification voltage and control DC brushless motor
Speed.
The structure of Commutation control unit is as shown in Fig. 2 by transformator, control power module, controllable rectifier module, zero passage inspection
Survey module, single chip control module, trigger control module, speed preset module composition.
Two input terminals of transformator are respectively phase line input terminal L, zero line input terminal N, two lead-out terminals point
Wei not the first ac terminal L1, the second ac terminal N1.First ac terminal L1, the second ac terminal N1 export the second alternating current
Source.The voltage effective value of the second alternating current power supply is effective less than the voltage of the single-phase 220V alternating current power supplys of Commutation control unit input
Value.
The embodiment of controllable rectifier module as shown in figure 3, by rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2,
Bidirectional thyristor V3, bidirectional thyristor V4 are constituted.2 ac input ends of rectifier bridge UR1 are respectively connecting to the first ac terminal
L1 and the second ac terminal N1, rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, rectification output negative terminal connection
To the second plate of bidirectional thyristor V4；After the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3
It is connected to the first controlled rectification lead-out terminal AC1；The second plate of bidirectional thyristor V1 is connected to the first ac terminal L1；It is two-way
The second controlled rectification lead-out terminal is connected to after the first anode of IGCT V2 is in parallel with the first anode of bidirectional thyristor V4
AC2；The second plate of bidirectional thyristor V2 is connected to the second ac terminal N1.
The trigger pulse of bidirectional thyristor V1 is input into from its control pole K11 and first anode K12, and bidirectional thyristor V2's touches
Send out pulse to be input into from its control pole K21 and first anode K22, the trigger pulse of bidirectional thyristor V3 is from its control pole K31 and the
One anode K32 is input into, and the trigger pulse of bidirectional thyristor V4 is input into from its control pole K41 and first anode K42.
Rectifier bridge UR1 adopts single-phase rectification bridge stack, or constitutes single-phase rectification bridge replacement using 4 diodes.
Trigger control module is the circuit for meeting following functions：It is provided with exchange control signal, rectification control signal；Hand over
When the AC controling signal of flow control input input is effective, trigger control module controls bidirectional thyristor V1 and bidirectional thyristor
Triggering and conducting during V2 zero passages；When the AC controling signal of exchange control signal input is invalid, trigger control module control is two-way
End after IGCT V1 and bidirectional thyristor V2 zero passages；When the rectification control signal of rectification control signal input is effective, triggering
Control module controls triggering and conducting when bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；The rectification of rectification control signal input
When control signal is invalid, end after trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passages.
The embodiment of trigger control module is as shown in figure 4, by zero cross fired optocoupler U1-U4 and input current-limiting resistance R1-
R4, output current limiting resistance R5-R8 are constituted, and are provided with exchange control signal KJ, rectification control signal KZ.Zero cross fired optocoupler
The inside of U1-U4 includes input light emitting diode, output optical controlled bidirectional thyrister, and zero-cross triggering circuit.Zero cross fired
The model of 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 again the
One DC supply VDD1 with exchange control signal KJ.Input current-limiting resistance R1 is connected on the input of zero cross fired optocoupler U1
Light-emitting diodes tube anode, as shown in Figure 4；Input current-limiting resistance R1 can also be connected on the input luminous two of zero cross fired optocoupler U1
The negative electrode of pole pipe.
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 again the
One DC supply VDD1 with exchange control signal KJ.The input of input current-limiting resistance R3 and zero cross fired optocoupler U3 lights
Diode series, series circuit is connected in parallel to again the first DC supply VDD1 and rectification control signal KZ.Input current limliting electricity
Resistance R4 connects with the input light emitting diode of zero cross fired optocoupler U4, and series circuit is connected in parallel to again the first DC supply VDD1
With rectification control signal KZ.Input current-limiting resistance R2-R4 can be connected on the input light-emitting diodes of corresponding zero cross fired optocoupler
Tube anode, as shown in Figure 4；The input light-emitting diodes tube cathode of corresponding zero cross fired optocoupler can also be connected on.
Output current limiting resistance R5 is connected in parallel to again double after connecting with zero cross fired optocoupler U1 inside output optical controlled bidirectional thyrister
To control pole K11 and first anode K12 of IGCT V1；The output of output current limiting resistance R6 and zero cross fired optocoupler U2 inside is light-operated
It is connected in parallel to control pole K21 and first anode K22 of bidirectional thyristor V2 after bidirectional thyristor series connection again；Output current limiting resistance R7 with
It is connected in parallel to control pole K31 and the of bidirectional thyristor V3 after zero cross fired optocoupler U3 inside output optical controlled bidirectional thyrister series connection again
One anode K32；Output current limiting resistance R8 is connected in parallel to again after connecting with zero cross fired optocoupler U4 inside output optical controlled bidirectional thyrister
Control pole K41 and first anode K42 of bidirectional thyristor V4.
Control section includes control power module, zero passage detection module, single chip control module, speed in Commutation control unit
The given module of degree, embodiment circuit is as shown in Figure 5.
It is the second alternating current power supply to control power module input, is output as the first DC operation provided to Commutation control unit
Power vd D1.In Fig. 5 embodiments, control power module is by diode D01, diode D02, diode D03, diode D04, electricity
Hold C1, three terminal regulator U5 composition.Diode D01, diode D02, diode D03, diode D04 composition control power supplys are single-phase
Rectifier bridge；Electric capacity C1 is connected in parallel on the DC voltage output end of control power supply single-phase rectification bridge, strobes；Three terminal regulator U5
Input VIN is connected to the rectification positive ends of control power supply single-phase rectification bridge；First DC supply VDD1 is steady from three ends
Depressor U5 outfans VOUT is exported.The rectification negative polarity end of power supply single-phase rectification bridge is controlled for publicly.Three terminal regulator U5 is selected
Select H7133.
Control power module can also adopt other implementations.Diode D01, diode D02, diode D03, two poles
The control power supply single-phase rectification bridge of pipe D04 compositions can be replaced with single-phase rectification bridge stack, and three terminal regulator U5 can adopt voltage stabilizing
Pipe mu balanced circuit or DC/DC manostat.
Zero passage detection module is the circuit with following functions：It is provided with zero passage voltage input, zero-crossing pulse outfan；Cross
No-voltage input is connected to the first ac terminal；The zero-crossing pulse of zero-crossing pulse outfan output is positive pulse；Zero-crossing pulse
It is corresponding with the second alternating current power supply positive half-wave；The width of zero-crossing pulse is less than the second alternating current power supply positive half-wave width；Second alternating current
Source positive half-wave is second alternating current power supply half-wave of the first ac terminal current potential higher than the second ac terminal current potential.
In Fig. 5 embodiments, zero passage detection module is detection shaping circuit, by diode D1, resistance R9, stabilivolt DW1 groups
Into.The two ends of resistance R9 are respectively connecting to diode D1 negative electrodes and stabilivolt DW1 negative electrodes, and diode D1 anodes are connected to the first friendship
Stream terminal L1, stabilivolt DW1 anodes are connected to publicly.Stabilivolt DW1 negative electrodes are the zero-crossing pulse output for exporting zero-crossing pulse
End.
Speed preset module is provided with speed preset signal output part and direction Setting signal outfan, and speed preset signal is defeated
Go out to hold output speed Setting signal, direction Setting signal outfan outbound course Setting signal.In Fig. 5 embodiments, speed preset
Module carries out partial pressure using potentiometer RW1 to the first DC supply VDD1, and the speed preset signal for obtaining is speed preset
Voltage.By potentiometer RW1 export speed preset average voltage be divided into n it is interval, minimum voltage overall travel speed Setting signal
Speed class is speed 1, and the speed class of ceiling voltage overall travel speed Setting signal is speed n；N area of speed preset voltage
Between it is corresponding with speed 1-n of speed class respectively；N is the integer more than or equal to 2.Speed preset module can also be using rotation
Other devices such as encoder, toggle switch, pulse potential device are realized.In Fig. 5 embodiments, speed preset module adopts direction switch
SWD outbound course Setting signals, publicly, other end is direction Setting signal outfan to a termination of direction switch SWD.
Single chip control module includes 1 road speed preset signal input part, 1 tunnel direction Setting signal input, and 1 tunnel is caught
Catch signal input part, 2 tunnel level signal outfans.1 road speed preset signal input part is connected to the speed of speed preset module
Setting signal outfan；1 tunnel direction Setting signal input is connected to the direction Setting signal outfan of speed preset module；1
Road signal acquisition input is connected to the zero-crossing pulse outfan of zero passage detection module, is input into zero-crossing pulse；2 tunnel level signals are defeated
Go out end to exchange control output end KJ, rectification control output end KZ, be respectively connecting to the exchange control input of trigger control module
End KJ, rectification control signal KZ.
In Fig. 5 embodiments, single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1, single-chip microprocessor MCU 1
Model is MSP430G2553.The analog voltage input A0 (P1.0) of single-chip microprocessor MCU 1 be speed preset signal input part, current potential
The output voltage of device RW1 is connected to the analog voltage input A0 (P1.0) of single-chip microprocessor MCU 1.If sent using other devices
The speed preset signal of switching value, digital quantity form, can be input into from the I/O mouths of single-chip microprocessor MCU 1.Single-chip microprocessor MCU 1 is by right
The speed preset voltage of analog voltage input A0 inputs carries out A/D conversions, or the input signal of reading I/O mouths, obtains
The speed class of speed preset signal.The P2.0 of single-chip microprocessor MCU 1 is signal acquisition input, is connected to zero passage detection module
Zero-crossing pulse outfan.The P1.3 of single-chip microprocessor MCU 1 is direction Setting signal input, is connected to the direction of speed preset module
Setting signal outfan.P1.1, P1.2 of single-chip microprocessor MCU 1 is level signal outfan, and wherein P1.1 is exchange control output end
KJ, P1.2 are rectification control output end KZ；Exchange control output end KJ, rectification control output end KZ are respectively connecting to trigger control
Exchange control signal KJ of module, rectification control signal KZ.
First controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 output of Commutation control unit is controllable
Commutating voltage, by controlling controlled rectification voltage come transmission speed control signal, speed control signal is by drawing for Commutation control unit
Guided wave and data wave component.The virtual value of controlled rectification voltage is identical with the voltage effective value of the second alternating current power supply.
The speed control signal has speed 1-n, common n speed class.
The guide wave by y-1 power frequency period rectified wave and 1 power frequency period the wave component that exchanges, rectified wave front,
Waves AC is rear；Y is the integer more than or equal to 2.
The data wave is the controlled rectification voltage wave of x power frequency period, and x is the integer more than or equal to 2.The speed control
Signal processed has speed 1-n, common n speed class；Speed 1-n of speed control signal speed class and speed preset signal
Correspond between speed 1-n of speed class.The corresponding DC brushless motor state of speed 1 of speed class is braking shape
State.
In the controlled rectification voltage wave of x power frequency period, 1 power frequency period, 1 numeric data code of correspondence, x power frequency period
Controlled rectification voltage wave correspondence x-bit data code；In each power frequency period, when its controlled rectification voltage wave is waves AC, corresponding 1
Position numeric data code is 0；In each power frequency period, when its controlled rectification voltage wave is rectified wave, corresponding 1 numeric data code is 1.Or
Be x power frequency period controlled rectification voltage wave in, 1 power frequency period, 1 numeric data code of correspondence；In each power frequency period, it can
When control commutating voltage ripple is waves AC, corresponding 1 numeric data code is 1；In each power frequency period, its controlled rectification voltage wave is whole
During stream ripple, corresponding 1 numeric data code is 0.
The x-bit data code includes x-1 bit rates code and 1 direction code, and now the relation between n and x is：N is less than
Equal to 2X-1.During composition data code, front, 1 direction code is rear for x-1 bit rates code.Speed code determines by speed preset signal,
Direction code is determined by direction Setting signal.
The numeric data code, speed code and direction code are binary code.
Waveform embodiment is as shown in Figure 6 during Commutation control unit transmission speed control signal.Y etc. in embodiment illustrated in fig. 6
6 are equal in 3, x, speed control signal has speed 1-32, totally 32 speed class.
What Fig. 6 sent is the speed control signal that speed class is speed 15.Fig. 6 (a) is the waveform of controlled rectification voltage,
It is guide wave that T1 therein is interval, and by rectified wave and 1 power frequency period of 2 power frequency periods wave component is exchanged.T2 intervals are
The controlled rectification voltage wave of the power frequency period of data wave, i.e., 6.In the controlled rectification voltage wave of 6 power frequency periods of embodiment, 1
1 numeric data code of individual power frequency period correspondence；In each power frequency period, when its controlled rectification voltage wave is waves AC, corresponding 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 according to
It is secondary for waves AC, rectified wave, rectified wave, rectified wave, waves AC, waves AC, corresponding 6 numeric data codes are 011100.6 data
First 5 of code are speed codes, and the scope of speed code is 00000-11111, and the speed class scope of representative is speed 1-32.Figure
In the data wave of 6 illustrated embodiments, 5 numeric data codes of correspondence are 01110, and the speed class of the speed control signal is speed 15.6
Last 1 of position numeric data code is direction code, and direction code is interval with T3 corresponding, is the waves AC of 1 power frequency period in embodiment, side
It is 0 to code.
X-1 bit rates code and 1 direction code composition data code, can also be using 1 direction code in front, x-1 bit rates
The posterior mode of code, now, still sends the controlled rectification voltage waveform shown in Fig. 6, then the 1st of 6 numeric data codes is direction
Code, direction code is 0；5 numeric data codes are 11100, and the speed class of the speed control signal for representing is speed 29.
When DC brushless motor is without the need for control direction, the x-bit data code constitutes x bit rate codes, directionless in numeric data code
Code, now the relation between n and x is：N is less than or equal to 2x。
The step of single chip control module sends a speed control signal is as follows：
Step 1, when waiting until the rising edge for receiving zero-crossing pulse step 2 is entered；
Step 2, stops exchange output, starts rectification output；
Step 3, the zero-crossing pulse rising edge to receiving is counted, and count value enters step 4 when reaching y-1；
Step 4, stops rectification output, starts exchange output；
Step 5, when waiting until the rising edge for receiving zero-crossing pulse step 6 is entered；
Step 6, sends the controlled rectification voltage wave of 1 power frequency period；
Step 7, when waiting until the rising edge for receiving zero-crossing pulse step 8 is entered；
Step 8, has been sent from going to step 9, otherwise return to step 6 during the controlled rectification voltage wave of x power frequency period；
Step 9, stops rectification output, starts exchange output.
Commutation control unit when normal maintenance does not send speed control signal state, hand over by single chip control module control
Flow control outfan KJ exports useful signal, and rectification control output end KZ exports invalid signals, zero cross fired optocoupler U1's and U2
Input LEDs ON, the input light emitting diode cut-off of zero cross fired optocoupler U3 and U4, bidirectional thyristor V1, two-way crystalline substance
Brake tube V2 is turned on, bidirectional thyristor V3, bidirectional thyristor V4 cut-off, the first controlled rectification lead-out terminal AC1, the second controlled rectification
The controlled rectification voltage of lead-out terminal AC2 outputs is alternating voltage.In the embodiment shown in fig. 4, single chip control module is defeated
The exchange control output end KJ that goes out, the signal of rectification control output end KZ are Low level effective.
The zero-crossing pulse of the output of zero passage detection module shown in Fig. 5 is corresponding with the positive half-wave of the second alternating current power supply, and zero passage arteries and veins
The width of punching is less than the second alternating current power supply positive half-wave width.The second alternating current power supply positive half-wave is that the first ac terminal current potential is high
In the second alternating current power supply half-wave of the second ac terminal current potential.
Single chip control module is detected after the zero-crossing pulse rising edge corresponding with half-wave in Fig. 61, into step 2.Institute
Stopping exchange output is stated, control exchange control output end KJ output invalid signals is referred to, from the next mistake of the second alternating current power supply
Zero point starts, bidirectional thyristor V1, bidirectional thyristor V2 cut-off；The beginning rectification output, refers to control rectification controlled output
End KZ output useful signals, from the beginning of the next zero crossing of the second alternating current power supply, bidirectional thyristor V3, bidirectional thyristor V4 lead
Logical, the controlled rectification voltage of the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 output is rectified current
Pressure.
The stopping rectification output, refers to control rectification control output end KZ output invalid signals, from the second alternating current power supply
Next zero crossing start, bidirectional thyristor V3, bidirectional thyristor V4 cut-off；It is described to start exchange output, refer to that control is handed over
Flow control outfan KJ exports useful signal, bidirectional thyristor V1, two-way from the beginning of the next zero crossing of the second alternating current power supply
IGCT V2 is turned on, the controlled rectification electricity of the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 output
Press as alternating voltage.
The controlled rectification voltage wave for sending 1 power frequency period, its method is the power frequency period for judging to need to send
Controlled rectification voltage wave be waves AC or rectified wave, if waves AC, then stop rectification output, start exchange output；
If rectified wave, then stop exchange output, start rectification output.
Each single power frequency period in the controlled rectification voltage wave is waves AC, or rectified wave；Single power frequency period
Waves AC by 1 single phase alternating current power supply positive half-wave and minus half wave component of 1 single phase alternating current power supply, positive half-wave bears half-wave front
Rear；The rectified wave of single power frequency period is made up of 2 rectified half-waves, first rectified half-waves and the second alternating current power supply positive half-wave pair
Should, second rectified half-waves is corresponding with the negative half-wave of the second alternating current power supply.The time of the power frequency period is 20ms.The either simplex frequency
Cycle is 1 power frequency period.
The method of Commutation control unit transmission speed control signal as shown in fig. 7, comprises：
Step A, reads Setting signal；
Step B, sends a speed control signal；
Step C, judges whether speed changes, and speed changes, return to step B；Speed does not change, and returns
Return 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 by regulation power supply module, waveform sampling module, single-chip microcomputer as shown in figure 8, adjust mould
Block, motor drive module composition.
The adjustment portion of speed regulation unit point includes regulation power supply module, waveform sampling module, single-chip microcomputer adjustment module, its
Embodiment is as shown in Figure 9.
Regulation power supply module provides the second DC supply VDD2 for speed regulation unit.In Fig. 9 embodiments, electricity is adjusted
Source module is made up of diode D05, diode D06, diode D07, diode D08, electric capacity C2, three terminal regulator U6.Two poles
Pipe D05, diode D06, diode D07, diode D08 composition regulation power supply single-phase rectification bridges；Electric capacity C2 is connected in parallel on regulation electricity
The DC voltage output end of source single-phase rectification bridge, strobes；Three terminal regulator U6 input VIN are connected to regulation power supply list
The rectification positive ends of commutating phase bridge；Second DC supply VDD2 is exported from three terminal regulator U6 outfans VOUT.Adjust
The rectification negative polarity end of power supply single-phase rectification bridge is reference ground.Three terminal regulator U6 selects H7133.
Regulation power supply module can also adopt other implementations.Diode D05, diode D06, diode D07, two poles
The regulation power supply single-phase rectification bridge of pipe D08 compositions can be replaced with single-phase rectification bridge stack, and three terminal regulator U6 can adopt voltage stabilizing
Pipe mu balanced circuit or DC/DC manostat.
Waveform sampling module is the circuit with following functions：It is provided with sampling Waveform Input end and sampling pulse outfan；
Sampling Waveform Input end is connected to the second controlled rectification input terminal；Waveform sampling module is electric by the second controlled rectification input terminal
Position detects higher than the waveform of the first controlled rectification input terminal current potential and amplitude limit obtains sampling pulse；The positive pulse of sampling pulse with
Second controlled rectification input terminal current potential is corresponding higher than the waveform of the first controlled rectification input terminal current potential.
In Fig. 9 embodiments, waveform sampling module is detection shaping circuit, by diode D2, resistance R12, stabilivolt DW2 groups
Into.The two ends of resistance R12 are respectively connecting to diode D2 negative electrodes and stabilivolt DW2 negative electrodes；Diode D2 anodes are sampling waveform
Input, is connected to the second controlled rectification input terminal AC2；Stabilivolt DW2 anodes are connected to reference ground；Stabilivolt DW2 negative electrodes
For sampling pulse outfan.
There is single-chip microcomputer adjustment module seizure input and speed to adjust output terminals A DJ, direction controlling outfan DIR, system
Dynamic control output end BRAK, catches the sampling pulse outfan that input is connected to waveform sampling module.Direction controlling outfan
DIR, the output type of control for brake outfan BRAK are switching values；It is pwm pulse that speed adjusts the output type of output terminals A DJ
Or analog voltage.
In Fig. 9 embodiments, single-chip microcomputer adjustment module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2, single-chip microprocessor MCU 2
Model is MSP430G2553, and the seizure input of single-chip microprocessor MCU 2 is P2.0, and speed adjusts output terminals A DJ for P1.2, output class
Type is pwm pulse；Direction controlling outfan DIR is P1.4, and control for brake outfan BRAK is P1.5, and P1.4, P1.5 output is electric
Flat control signal.
Motor drive module is used to drive DC brushless motor, is provided with pwm pulse speed governing input or analog voltage is adjusted
The driver for brushless DC motor of fast input, driven by Brush-Less DC motor chip may be suitable for the present invention.Shown in Figure 10
It is the circuit using the embodiment 1 of driven by Brush-Less DC motor chip, Figure 11 is shown using driver for brushless DC motor
The circuit of embodiment 2.
In embodiment illustrated in fig. 10, motor drive module drives core by motor drive ic F310, three phase full bridge MOSFET
Piece U7 and diode D31-D34, electric capacity C31-C32, resistance R31-R48, audion V31, potentiometer RW31, temperature-sensitive electricity
Resistance NTC compositions.
In Figure 10 embodiments, diode D31-D34 constitutes single phase bridge type rectifier circu to the first controlled rectification input terminal
The controlled rectification voltage of AC1, the second controlled rectification input terminal AC2 input carries out rectification, then obtains electricity Jing after electric capacity C31 filtering
Machine driving power supply U+, powers to motor drive ic F310, three phase full bridge MOSFET driving chip U7.Single phase bridge type rectifier circu
Negative polarity end be connected to reference ground.
In Figure 10 embodiments, resistance R31, resistance R32, audion V31, electric capacity C32 composition pwm pulse/analog voltages turn
Circuit is changed, the pwm pulse that speed adjusts input ADJ is converted to into analog voltage speed Regulate signal, analog voltage speed is adjusted
Section signal is connected to the speed electric input SREF of motor drive ic F310.DC source VDD6 is by motor drive ic
+ 6V the power output ends of F310 are provided.If it is simulation electricity that single-chip microcomputer adjustment module speed adjusts the output type of output terminals A DJ
Press, then the speed electric input SREF of motor drive ic F310 is connected directly to speed and adjusts output terminals A DJ, without the need for PWM
Pulse/analog voltage change-over circuit.
In Figure 10 embodiments, driving input HU, LU, HV, LV, HW, LW point of three phase full bridge MOSFET driving chip U7
It is not connected to drive output PWM_HU, PWM_LU, PWM_HV, PWM_LV, PWM_HW, PWM_ of motor drive ic F310
LW；Three-phase output end U, V, W of three phase full bridge MOSFET driving chip U7 is connected to the three-phase input of DC brushless motor M31
End；The negative supply input V- Jing resistance R39 of three phase full bridge MOSFET driving chip U7 are connected to reference ground.On resistance R39
Sampling voltage is connected to the sampling current input ITRIP of motor drive ic F310；Current limliting threshold voltage ILIMIT is by current potential
Device RW31 determines.
In Figure 10 embodiments, RPI voltages are determined by resistance R33, resistance R34, and RPI voltage swings determine electric motor starting electric current
Size；RSF voltages are determined that RSF voltage swings determine the size of commutating frequency during electric motor starting by resistance R35, resistance R36；
RSD voltages are determined that the time restarted automatically after excessively stream is arranged by RSD by resistance R37, resistance R38.
In Figure 10 embodiments, VLIMIT refers to threshold voltage for overtemperature protection, is determined by resistance R41, resistance R42；VTH is
Input judgement voltage, is determined by resistance R40, critesistor NTC.
In Figure 10 embodiments, resistance R43-R48 composition bleeder circuit collections mutually hold feedback voltage to detect counter electromotive force,
Three-phase feedback voltage is respectively connecting to feedback input end EMF_U, EMF_V, EMF_W of motor drive ic F310.
In Figure 10 embodiments, direction controlling outfan DIR, the control for brake outfan BRAK difference of single-chip microcomputer adjustment module
It is connected to direction controlling input F/R, the braking input RESET of motor drive ic F310.Motor drive ic F310's
Input RESET is also known as reseting controling end RESET for braking.
In Figure 10 embodiments, the power end VCC of motor drive ic F310 is connected to motor drive power supply U+, ground terminal GND
It is connected to reference ground.
In Figure 10 embodiments, DC brushless motor M31 is the DC brushless motor without Hall element.
In embodiment illustrated in fig. 11, motor drive module is by brushless motor driver U61 and diode D61-D64, electricity
Hold C61-C62, resistance R61-R62, audion V61 compositions.The model of brushless motor driver U61 is BLD-70.
In Figure 11 embodiments, diode D61-D64 constitutes single phase bridge type rectifier circu to the first controlled rectification input terminal
The controlled rectification voltage of AC1, the second controlled rectification input terminal AC2 input carries out rectification, then obtains electricity Jing after electric capacity C61 filtering
Machine driving power supply V+, powers to brushless motor driver U61.The negative polarity end of single phase bridge type rectifier circu is connected to reference ground.
In Figure 11 embodiments, resistance R61, resistance R62, audion V61, electric capacity C62 composition pwm pulse/analog voltages turn
Circuit is changed, the pwm pulse that speed adjusts input ADJ is converted to into analog voltage speed Regulate signal, analog voltage speed is adjusted
Section signal is connected to the speed electric input SV of brushless motor driver U61.DC source VDD62 is by brushless motor driver
Power output end VCC (+6.25V) of U61 is provided.
In Figure 11 embodiments, three-phase phase terminal U, V of brshless DC motor M61, W are connected to brushless motor driver
Three-phase output end U, V, W of U61；Hall signal outfan HU, HV, HW of brshless DC motor M61 is connected to brushless electric machine drive
Hall signal input HU, HV, HW of dynamic device U61；The Hall power supply of brshless DC motor M61 is by brushless motor driver U61
Power output end VCC (+6.25V) provide, H+ be connected to brushless motor driver U61 power output end VCC, H- connection
To reference ground.
In Figure 11 embodiments, direction controlling outfan DIR, the control for brake outfan BRAK difference of single-chip microcomputer adjustment module
It is connected to direction controlling input F/R, the braking input BRK of brushless motor driver U61.
In Figure 11 embodiments, the power positive end DC+ of brushless motor driver U61 is connected to motor drive power supply V+, power supply
Negative terminal DC- is connected to reference ground.
Speed regulation unit receives speed control signal and adjusts the speed of DC brushless motor, its method such as Figure 12 institutes
Show, including：
Step one, motor control initialization, sets DC brushless motor as on-position；
Step 2, determines whether speed control signal；Without speed control signal, return to step two；There is speed controlling
Signal, goes to step 3；
Step 3, receives speed control signal；
Step 4, adjusts DC brushless motor speed；Return to step two.
When rotating switches, needing to first pass through control for brake outfan BRAK output brake signals makes motor braking, makes
After dynamic end, then from direction controlling outfan DIR outbound course control signals, realize motor reversal.Directly switch without braking
Realize that rotating may result in load current and be increased dramatically and damage drive circuit.
Adjusting the method for DC brushless motor speed is, in the speed control signal that single-chip microcomputer adjustment module is received, side
When not changing to code, the speed of DC brushless motor is controlled according to the corresponding speed class of speed code；Single-chip microcomputer adjustment module
In the speed control signal for receiving, when direction code changes, DC brushless motor braking is first controlled, it is right further according to speed code
The speed class answered controls the speed of DC brushless motor.
When adjusting the method for DC brushless motor speed, when the speed control signal correspondence that single-chip microcomputer adjustment module is received
Speed class be grade 1 when, control DC brushless motor braking.
Determine whether speed control signal, method is to judge from the first controlled rectification input terminal AC1, second controllable whole
Whether the controlled rectification voltage of stream input terminal AC2 inputs has guide wave.
Speed control signal is received, method is the controlled rectification voltage wave for receiving x power frequency period, by x power frequency period
Controlled rectification voltage wave be converted to x-bit data code.
The function of waveform sampling module is to carry out detection shaping to controlled rectification voltage.In Fig. 9 embodiments, waveform sampling mould
Waveform detection and amplitude limit of the block by the first controlled rectification input terminal AC1 current potentials less than the second controlled rectification input terminal AC2 is obtained
To sampling pulse, export to the seizure input of single-chip microcomputer adjustment module；The positive pulse of sampling pulse is defeated with the first controlled rectification
Enter terminal current potential corresponding less than the half-wave of the second controlled rectification input terminal current potential, sampling pulse positive pulse width is less than should be partly
Wave width.Speed control signal medium velocity grade is shown in sampling pulse example such as Fig. 6 (b) of speed 15；When controlled rectification electricity
Press for alternating voltage when, sampling pulse be dutycycle less than 50% and second alternating current power supply same frequency square wave；When controllable whole
When stream voltage is commutating voltage, sampling pulse is low level.
In embodiment illustrated in fig. 6, guide wave exchanges wave component by rectified wave and 1 power frequency period of 2 power frequency periods,
Sampling pulse before guide wave is the square wave that the cycle is power frequency period.The rectified wave of 2 power frequency periods should make sampling arteries and veins
It is the interval low level of 40ms, i.e. 2 power frequency period to occur width in punching, but actually guide wave makes occur width in sampling pulse
Spend the low level interval to be close to 50ms, i.e. 2.5 power frequency period, low level interval T4 as shown in Figure 6；0.5 for having more
The interval low level of power frequency period is produced by the positive half-wave of 1 power frequency period waves AC after immediately；1 work of guide wave
The negative half-wave of the waves AC in frequency cycle makes occur the high level that width is 0.5 power frequency period interval in sampling pulse, such as Fig. 6 institutes
The high level interval T5 for showing.
Judge whether controlled rectification voltage has guide wave, method is to judge in sampling pulse after power frequency period square wave
More than the low level interval power frequency period number of power frequency period width；If there is the low level that power frequency period number is y-1 in sampling pulse
, then there is guide wave in interval in controlled rectification voltage；If interval for the low level of y-1 without power frequency period number in sampling pulse,
Without guide wave in controlled rectification voltage.
Judge the low level interval power frequency period after power frequency period square wave more than power frequency period width in sampling pulse
Several methods are, wide to the low level pulse measurement after power frequency period square wave in sampling pulse more than power frequency period width
Degree, if the low level pulse width more than power frequency period width that obtains of measurement is W, then the interval power frequency period number of the low level
For INT (W/20)；The function of INT functions is that fractions omitted part rounds.
In the controlled rectification voltage wave of x power frequency period of data wave, 1 power frequency period 1 numeric data code of correspondence, each work
The voltage wave in frequency cycle can be waves AC, or rectified wave.When the voltage wave of 1 power frequency period is rectified wave, with
Its corresponding sampling pulse is the interval low level of 1 power frequency period；When the voltage wave of 1 power frequency period is waves AC, with
Its corresponding sampling pulse is square wave of 1 dutycycle less than 50%.In embodiment illustrated in fig. 6, data wave is continuous 6 works
The controlled rectification voltage wave in frequency cycle, i.e. the interval corresponding waves ACs of T6, the interval corresponding rectified waves of T7, T8 is corresponding whole in interval
Stream ripple, the interval corresponding rectified waves of T9, the corresponding waves ACs of interval T10 and the interval corresponding waves ACs of T11；5 bit rate codes are
01110,1 direction code is 0.Speed class is speed 15.
It is by the method that the controlled rectification voltage wave of x power frequency period is converted to x-bit data code, the x after guide wave
In individual power frequency period interval, when the interval sampling pulse of 1 power frequency period is low level, the corresponding numeric data code is 1, when
When 1 interval sampling pulse of power frequency period is square wave of 1 dutycycle less than 50%, the corresponding numeric data code is 0.Or
Person is, in the x power frequency period interval after guide wave, when the interval sampling pulse of 1 power frequency period is low level, and phase
The numeric data code answered is 0, when the interval sampling pulse of 1 power frequency period is square wave of 1 dutycycle less than 50%, phase
The numeric data code answered is 1.
Speed code is converted to speed class can be using the method such as calculating, table look-up.In embodiment, the scope of 5 bit rate codes
It is 00000-11111, 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, speed
When code is 11111, speed class is speed 32.
When DC brushless motor does not need control direction, speed preset module is without the need for direction Setting signal outfan, monolithic
, without the need for direction Setting signal input, single-chip microcomputer adjustment module is without the need for direction controlling outfan, Motor drive mould for machine control module
Block is without the need for direction controlling input.
Controlled rectification voltage is straight to the regulation power supply module of speed regulation unit, motor drive module and waveform sampling module
Power supply is connect, regulation power supply module therein, motor drive module carry out first rectification, then Jing capacitor filterings to controlled rectification voltage
Afterwards, power supply is provided to interlock circuit；When controlled rectification voltage is zero, regulation power supply module, the source current of motor drive module
Also it is zero；Waveform sampling module is non-linear resistive load, when controlled rectification voltage is zero, the power supply electricity of waveform sampling module
Stream is zero.Therefore, when controlled rectification voltage is zero, it is zero to the source current that speed regulation unit is provided.So, rectification control
Unit processed the zero crossing of the second alternating current power supply carry out stop exchange output, start rectification output, or be off rectification output,
When starting to exchange the switching of output, between bidirectional thyristor V1, bidirectional thyristor V2 and bidirectional thyristor V3, bidirectional thyristor V4
Can the successful change of current, power supply short circuit will not be caused.
The present invention has following features：
1. power line distant control DC brushless motor speed is adopted, without the need for remote control, without the need for control line；
2. DC brushless motor speed can as needed be divided into multiple grades；
3. rectified wave transfer rate control signal is adopted, its virtual value is identical with waves AC, does not result in brush DC electricity
Power supply is unstable when motor speed is adjusted.
Claims (10)
1. the method for the remote speed governing of a kind of DC brushless motor, it is characterised in that：
The device being made up of Commutation control unit and speed regulation unit is realized；
The Commutation control unit be provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal, second can
Control rectification output end；The phase line input terminal, zero line input terminal input single-phase 220V alternating current power supplys；Described first is controllable
Rectification output end, the second controlled rectification lead-out terminal output controlled rectification voltage；
The speed regulation unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described first can
Control rectification input terminal, the second controlled rectification input terminal are respectively connecting to the first controlled rectification outfan of Commutation control unit
Son, the second controlled rectification lead-out terminal；
The Commutation control unit is by transformator, control power module, controllable rectifier module, zero passage detection module, single-chip microcomputer control
Molding block, trigger control module, speed preset module composition；
Two input terminals of the transformator are respectively phase line input terminal, zero line input terminal, two lead-out terminal difference
For the first ac terminal, the second ac terminal；First ac terminal, the second ac terminal export the second alternating current power supply；
The control power module exports the first direct current work by power supply single-phase rectification bridge is controlled and the first filter regulator circuit is constituted
Make power supply；Two ac input ends of the control power supply single-phase rectification bridge are respectively connecting to the first ac terminal, the second exchange
Terminal；
The rectification negative polarity end for controlling power supply single-phase rectification bridge is for publicly；First direct current work of control power module output
Make power supply to power to single chip control module；
The controllable rectifier module is by rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, two-way crystalline substance
Brake tube V4 is constituted；2 ac input ends of the rectifier bridge UR1 are respectively connecting to the first ac terminal and the second ac terminal,
Rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification output negative terminal is connected to the second of bidirectional thyristor V4
Anode；It is defeated the first controlled rectification to be connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3
Go out terminal；The second plate of bidirectional thyristor V1 is connected to the first ac terminal；The first anode of bidirectional thyristor V2 with it is two-way
The second controlled rectification lead-out terminal is connected to after the first anode parallel connection of IGCT V4；The second plate connection of bidirectional thyristor V2
To the second ac terminal；
The trigger control module is provided with exchange control signal, rectification control signal；The exchange control signal input
AC controling signal it is effective when, trigger control module control bidirectional thyristor V1 and during bidirectional thyristor V2 zero passages triggering lead
It is logical；It is described exchange control signal input AC controling signal it is invalid when, trigger control module control bidirectional thyristor V1 and
End after bidirectional thyristor V2 zero passages；When the rectification control signal of the rectification control signal input is effective, triggering control mould
Block controls triggering and conducting when bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；The rectification control of the rectification control signal input
During invalidating signal processed, end after trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；
The zero passage detection module is provided with zero passage voltage input, zero-crossing pulse outfan；The zero passage voltage input connection
To the first ac terminal；The zero-crossing pulse of the zero-crossing pulse outfan output is positive pulse；The zero-crossing pulse and second is handed over
Stream power supply positive half-wave correspondence；The width of the zero-crossing pulse is less than the second alternating current power supply positive half-wave width；Second alternating current
Source positive half-wave is second alternating current power supply half-wave of the first ac terminal current potential higher than the second ac terminal current potential；
The speed preset module is provided with speed preset signal output part and direction Setting signal outfan；
It is defeated that the single chip control module includes speed preset signal input part, direction Setting signal input, signal acquisition
Enter end and two-way level signal outfan；The speed preset signal input part is connected to the speed preset letter of speed preset module
Number outfan；The direction Setting signal input is connected to the direction Setting signal outfan of speed preset module；It is described to catch
Catch the zero-crossing pulse outfan that signal input part is connected to zero passage detection module；The two-way level signal outfan is respectively handed over
Flow control outfan, rectification control output end；The exchange control output end, rectification control output end are respectively connecting to triggering control
The exchange control signal of molding block, rectification control signal；
The speed regulation unit is by regulation power supply module, waveform sampling module, single-chip microcomputer adjustment module, motor drive module group
Into；The regulation power supply module input controlled rectification voltage, the second DC supply of output, by regulation power supply single-phase rectification bridge
With the second filter regulator circuit composition；The rectification negative polarity end of the regulation power supply single-phase rectification bridge is reference ground；Regulation power supply
Second DC supply of module output is powered to single-chip microcomputer adjustment module；
The waveform sampling module is provided with sampling Waveform Input end and sampling pulse outfan；Sampling Waveform Input end connection
To the second controlled rectification input terminal；The waveform sampling module is controllable higher than first by the second controlled rectification input terminal current potential
Simultaneously amplitude limit obtains sampling pulse for the waveform detection of rectification input terminal current potential；The positive pulse of the sampling pulse is controllable with second whole
Stream input terminal current potential is corresponding higher than the waveform of the first controlled rectification input terminal current potential；
There is the single-chip microcomputer adjustment module seizure input and speed to adjust outfan, direction controlling outfan, control for brake
Outfan；The seizure input of single-chip microcomputer adjustment module is connected to the sampling pulse outfan of waveform sampling module；
The motor drive module is used to drive DC brushless motor, is provided with speed and adjusts input, direction controlling input, system
Dynamic control signal；The speed adjusts the speed regulation outfan that input is connected to single-chip microcomputer adjustment module, direction controlling
Input is connected to the direction controlling outfan of single-chip microcomputer adjustment module, and control for brake input is connected to single-chip microcomputer adjustment module
Control for brake outfan；
, by controlling controlled rectification voltage come transmission speed control signal, speed control signal is by guiding for the Commutation control unit
Ripple and data wave component；
The guide wave by the rectified wave of y-1 power frequency period and the wave component that exchanges of 1 power frequency period, hand over front by rectified wave
Stream ripple is rear；Y is the integer more than or equal to 2；
The data wave is the controlled rectification voltage wave of x power frequency period, and x is the integer more than or equal to 2；
The speed control signal has speed 1-n, common n speed class；The speed class of the speed preset signal has speed
Degree 1-n；N is the integer more than or equal to 2；
In the controlled rectification voltage wave of the x power frequency period, 1 power frequency period 1 numeric data code of correspondence；X power frequency period
Controlled rectification voltage wave correspondence x-bit data code；
The x-bit data code includes x-1 bit rates code and 1 direction code；Relation between the n and x is：N is less than or equal to
2X-1；
The numeric data code, speed code and direction code are binary code；
The single chip control module sends the method for a speed control signal,
Step 1, when waiting until the rising edge for receiving zero-crossing pulse step 2 is entered；
Step 2, stops exchange output, starts rectification output；
Step 3, the zero-crossing pulse rising edge to receiving is counted, and count value enters step 4 when reaching y-1；
Step 4, stops rectification output, starts exchange output；
Step 5, when waiting until the rising edge for receiving zero-crossing pulse step 6 is entered；
Step 6, sends the controlled rectification voltage wave of 1 power frequency period；
Step 7, when waiting until the rising edge for receiving zero-crossing pulse step 8 is entered；
Step 8, has been sent from going to step 9, otherwise return to step 6 during the controlled rectification voltage wave of x power frequency period；
Step 9, stops rectification output, starts exchange output；
The method of the Commutation control unit transmission speed control signal is,
Step A, reads Setting signal；
Step B, sends a speed control signal；
Step C, judges whether speed changes, and speed changes, return to step B；Speed does not change, and returns step
Rapid C；
The speed regulation unit receives speed control signal and adjusts the method for DC brushless motor speed,
Step one, motor control initialization, sets DC brushless motor as on-position；
Step 2, determines whether speed control signal；Without speed control signal, return to step two；There is speed control signal,
Go to step 3；
Step 3, receives speed control signal；
Step 4, adjusts DC brushless motor speed；Return to step two.
2. the method for the remote speed governing of DC brushless motor according to claim 1, it is characterised in that：It is described to judge whether
There is speed control signal, method is to judge whether there is guide wave in controlled rectification voltage.
3. the method for the remote speed governing of DC brushless motor according to claim 2, it is characterised in that：It is described to judge controllable
The method for whether having guide wave in commutating voltage is to judge to exceed power frequency period width in sampling pulse after power frequency period square wave
The low level interval power frequency period number of degree；There is power frequency period number in sampling pulse after power frequency period square wave for y-1's
Low level is interval, then have guide wave in controlled rectification voltage；Without power frequency in sampling pulse after power frequency period square wave
Periodicity is interval for the low level of y-1, then without guide wave in controlled rectification voltage.
4. the method for the remote speed governing of DC brushless motor according to claim 3, it is characterised in that：It is described to judge sampling
The method of the low level interval power frequency period number in pulse after power frequency period square wave more than power frequency period width is, to sampling
In pulse after power frequency period square wave more than power frequency period width low level pulse measurement width, if measurement obtain exceed
The low level pulse width of power frequency period width is W, then the interval power frequency period number of the low level is INT (W/20)；INT functions
Function be that fractions omitted part rounds.
5. the method for the remote speed governing of DC brushless motor according to claim 1, it is characterised in that：The reception speed
The method of control signal is that the controlled rectification voltage wave for receiving x power frequency period is converted to x-bit data code, and x-bit data code is turned
Speed code and direction code are changed to, speed code is converted to into the speed class of speed control signal.
6. the method for the remote speed governing of DC brushless motor according to claim 5, it is characterised in that：The reception x
The controlled rectification voltage wave of power frequency period is converted to x-bit data code, and its method is：
In x power frequency period interval after guide wave, when the interval sampling pulse of 1 power frequency period is low level, phase
The numeric data code answered is 1, when the interval sampling pulse of 1 power frequency period is square wave of 1 dutycycle less than 50%, phase
The numeric data code answered is 0；
Its method or：
In x power frequency period interval after guide wave, when the interval sampling pulse of 1 power frequency period is low level, phase
The numeric data code answered is 0, when the interval sampling pulse of 1 power frequency period is square wave of 1 dutycycle less than 50%, phase
The numeric data code answered is 1.
7. the method for the remote speed governing of DC brushless motor according to claim 1, it is characterised in that：It is described to stop exchange
Output, refers to control exchange control output end output invalid signals；The beginning rectification output, refers to control rectification controlled output
End output useful signal；It is described to start exchange output, refer to control exchange control output end output useful signal；The stopping is whole
Stream output, refers to control rectification control output end output invalid signals.
8. the method for the remote speed governing of DC brushless motor according to claim 1, it is characterised in that：The judgement speed
The method for whether changing is that the speed class of speed preset signal changes, or direction Setting signal changes,
Then speed changes.
9. the method for the remote speed governing of DC brushless motor according to claim 1, it is characterised in that：The speed controlling
When the speed class of signal is grade 1, control DC brushless motor braking.
10. the method for the remote speed governing of DC brushless motor according to claim 1, it is characterised in that：The power frequency week
Phase is 20ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510386930.XA CN105048893B (en) | 2015-07-06 | 2015-07-06 | Method for long-distance speed regulation of DC brushless motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510386930.XA CN105048893B (en) | 2015-07-06 | 2015-07-06 | Method for long-distance speed regulation of DC brushless motor |
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| Publication Number | Publication Date |
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| CN105048893A CN105048893A (en) | 2015-11-11 |
| CN105048893B true CN105048893B (en) | 2017-05-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6617818B2 (en) * | 2000-08-10 | 2003-09-09 | Prolific Technology Inc. | Voltage independent PWM base frequency generating method |
| CN101010865A (en) * | 2004-09-08 | 2007-08-01 | 大金工业株式会社 | Polyphase current supplying circuit and driver apparatus |
| CN101316070A (en) * | 2007-06-01 | 2008-12-03 | 电力集成公司 | Method and apparatus to control two regulated outputs of a flyback power supply |
| CN204156768U (en) * | 2014-10-29 | 2015-02-11 | 哈尔滨理工大学 | The Switched Reluctance Motor that a kind of portable wireless controls |
| CN204357679U (en) * | 2014-12-05 | 2015-05-27 | 天邦膜技术国家工程研究中心有限责任公司 | Remote Variable Frequency Control System for Water Circulating Pump |
-
2015
- 2015-07-06 CN CN201510386930.XA patent/CN105048893B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6617818B2 (en) * | 2000-08-10 | 2003-09-09 | Prolific Technology Inc. | Voltage independent PWM base frequency generating method |
| CN101010865A (en) * | 2004-09-08 | 2007-08-01 | 大金工业株式会社 | Polyphase current supplying circuit and driver apparatus |
| CN101316070A (en) * | 2007-06-01 | 2008-12-03 | 电力集成公司 | Method and apparatus to control two regulated outputs of a flyback power supply |
| CN204156768U (en) * | 2014-10-29 | 2015-02-11 | 哈尔滨理工大学 | The Switched Reluctance Motor that a kind of portable wireless controls |
| CN204357679U (en) * | 2014-12-05 | 2015-05-27 | 天邦膜技术国家工程研究中心有限责任公司 | Remote Variable Frequency Control System for Water Circulating Pump |
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| CN105048893A (en) | 2015-11-11 |
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