CN100379144C - Inverter controller and oil extraction machine having the same - Google Patents
Inverter controller and oil extraction machine having the same Download PDFInfo
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- CN100379144C CN100379144C CNB2005100721928A CN200510072192A CN100379144C CN 100379144 C CN100379144 C CN 100379144C CN B2005100721928 A CNB2005100721928 A CN B2005100721928A CN 200510072192 A CN200510072192 A CN 200510072192A CN 100379144 C CN100379144 C CN 100379144C
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Abstract
A forward/backward indicator 10 outputs a direction signal for indicating a downward or upward movement in response to sensor signals from sensors 109a, 111a. A switching signal is reversed and outputted when an output frequency instruction value from an acceleration/deceleration adjuster 11 becomes 0Hz after the direction signal is reversed. The acceleration/deceleration adjuster 11 increases the output frequency instruction value from 0 Hz at every timing of the reversed direction signal in response to a frequency pattern after the output frequency instruction value is decreased to 0Hz. A voltage instruction value generator 15 generates a voltage instruction value in response to the frequency pattern. An electric angle creator 22 temporally integrates the output frequency instruction value and creates an electric angle based on the switching signal. A three-phase sinusoidal wave generator 23 generates a reference sinusoidal wave corresponding to the electric angle. Comparators 28, 29, create pulse width modulation signals from the reference sinusoidal wave and a triangular wave signal.
Description
Technical field
The present invention relates to a kind of oil production machine of exploiting oil field oil, especially a kind of control device for inverter of the action that can smoothly realize allowing the moving direction counter-rotating that is vertically set on motor on the ground and oil production machine with this control device for inverter.
Background technology
Oil production machine is to be drawn onto ground device with buried at underground oil, as the one example, is known that to be delivered to and to be arranged on underground pumping cylinder and to recover the oil by pump work being arranged on moving up and down of on the ground motor.
Here, with reference to Fig. 1, the basic comprising and the action thereof of former linearly operating formula oil production machine 100 described.
As shown in Figure 1, oil production machine 100, constitute as electrical system, have: motor 1, control device for inverter (INV) 103, regeneration unit (DBR) 105, impedance discharge (R) 107, upper end position transducer 109a, lower end position transducer 111a, and adopt pumping cylinder 113, weight equalizer 115, cable 117, roller 119a, 119b, 119c etc. are arranged on structure on the iron prop 121.
Be vertically set on the inside of the iron prop 121 of central authorities, be provided with the guide rail (not shown) on above-below direction, this guide rail is provided with the motor 1 that can freely move up and down, and motor 1 drives up and down at guide rail, its power passes to pumping cylinder 113 and weight equalizer 115 from cable 117, and it is moved up and down.
Control device for inverter 103 by from the position transducer 109a of upper end that is arranged on iron prop 121 and bottom, the sensor signal of 111a, allows the rotation direction counter-rotating of rise and fall of motor 1, carries out perseveration.Owing to during the rise and fall of motor 1, produce regenerated energy in the motor 1, therefore,, in control device for inverter 103,, be connected with impedance discharge 107 through regeneration unit 105 in order to absorb this energy.
And,, under the situation of having used three-phase motor, for the counter-rotating of its rotation direction,, just become in the direction opposite and turn round as motor 1 with present rotation direction as long as will be supplied to the two-phase in the three-phase electricity of three-phase motor to exchange.For example, under the situation of the order distribution of three-phase motor being pressed U, V, W, distribution is switched to the order of V, U, W, just allow the rotation direction of three-phase motor reverse.
In addition, as the reverse control method of three-phase motor, the spy opens and has announced " alternating current motor drives the control method with inverter " in the flat 9-93997 communique.Especially, in the document, recorded and narrated to use and resolved into the VVVF inverter that d axle value and q axle value are carried out vector control, three-phase motor turns round.
Yet in the control of the motor of the linearly operating formula oil production machine 100 shown in Fig. 1, existence can't be carried out smoothly from rising to decline, or from the direction that drops to rising this problem of reversing.
Control device for inverter 103 in order to allow the rotation direction counter-rotating of motor 1, carries out operation with the two-phase in three-phase (U phase, V phase, the W phase) output (for example U with V mutually) exchange by software (program that microcomputer is performed).
Therefore, when exchanging two-phase output, also, when rotation direction was reversed, because phase voltage changes, inverter output voltage had changed.The variation of this output voltage is the reason that can not allow the counter-rotating of the direction of the motor of oil production machine 100 smoothly carry out.
Summary of the invention
The present invention is for addressing the above problem, purpose is to provide a kind of and can smoothly realizes in order to drive the oil production machine of linearly operating formula, and descends or the control device for inverter of action when dropping to the direction counter-rotating of rising and the oil production machine with this control device for inverter from rising to.
For addressing the above problem, the 1st side of the present invention is: in the control device for inverter of the inverter of giving the vertical motor power supply that is provided with and moves up and down on straight line being controlled by frequency and voltage, have: the upper end position transducer, its detection said motor is positioned at the upper end position place on the straight line; The lower end position transducer, its detection said motor is positioned at the lower end position place on the straight line; Operating unit comes the incoming frequency instruction according to operation; The frequency mode memory cell is preserved frequency mode according to the frequency instruction of being imported by the aforesaid operations unit; Just change/reverse indicating member, it is according to the sensor signal from above-mentioned upper end position transducer or lower end position transducer, the direction signal of output expression descent direction or ascent direction, simultaneously, after this direction signal counter-rotating, when the output frequency command value from aftermentioned acceleration and deceleration adjustment unit becomes 0Hz, with the switching signal counter-rotating and the output of positive veer of expression or reverse directions; The acceleration and deceleration adjustment unit, it, is reduced to the output frequency command value after the 0Hz according to the said frequencies pattern from direction signal when counter-rotating of just changeing/reversing indicating mechanism whenever above-mentioned, and its continuation is risen from 0Hz; The voltage instruction value generating unit, it is according to said frequencies mode producing voltage instruction value; The electric angle generation unit, it carries out time integral according to from above-mentioned switching signal of just changeing/reversing indicating member to the output frequency command value from above-mentioned acceleration and deceleration adjustment unit, generates electric angle; Sinusoidal wave generating unit, it produces corresponding to the baseline sinusoidal wave from the electric angle of above-mentioned electric angle generating unit; The triangular wave generating unit, it produces triangular signal; And pwm unit, it is according to from the baseline sinusoidal wave of above-mentioned sinusoidal wave generating unit and triangular signal from above-mentioned triangular wave generating unit, production burst bandwidth modulation signals; When above-mentioned inverter is controlled, can carry out descending or action when dropping to the direction conversion of rising of said motor smoothly from rising to.
Like this, in the present invention, can realize smoothly prolonging the life-span of motor from rising to decline or, consequently, can reducing mechanical loss from dropping to the direction counter-rotating action of rising.
The 2nd side of the present invention is: have underground with being arranged on, move up and down the pump that pumping cylinder recovers the oil; Couple together by cable being arranged on said motor and above-mentioned pumping cylinder on the ground, control said motor, moving up and down of said motor passed to pumping cylinder drive said pump recover the oil by above-mentioned control device for inverter.
Description of drawings
Fig. 1 is the schematic diagram of the formation of the oil production machine 100 before the expression;
Fig. 2 is the schematic diagram of the formation of the oil production machine 50 of expression one embodiment of the present invention;
Fig. 3 is the schematic diagram of the formation of the control device for inverter 2 of expression the 1st execution mode of the present invention;
Fig. 4 is the schematic diagram of expression rectification circuit 5 with the detailed formation of inverter circuit 7;
Fig. 5 is the schematic diagram of the detailed formation of expression guidance panel 8 and instruction circuit 9;
The schematic diagram of the voltage/frequency characteristic of the voltage instruction value V1 that Fig. 6 A, 6B, 6C be respectively the accelerating performance, deceleration characteristic of the output frequency instruction f1 that exported by acceleration and deceleration adjuster 11 of expression, exported by voltage instruction value generator 12;
Fig. 7 is the schematic diagram of the detailed formation of expression inverter control circuit 21;
Fig. 8 A, Fig. 8 B are the schematic diagram of the control action of explanation control device for inverter 2;
Fig. 9 A, Fig. 9 B are the sequential chart of the action of explanation electrical angle maker 22;
Figure 10 is the sequential chart of the action of explanation three phase sine wave producer 23.
Embodiment
With reference to the accompanying drawings embodiments of the present invention are described.
Fig. 2 is the schematic diagram of the formation of the oil production machine 50 of expression 1 execution mode of the present invention.Fig. 3 is the schematic diagram of the formation of the control device for inverter 2 of expression 1 execution mode of the present invention.In addition, control device for inverter 2 shown in Figure 3 replaces the control device for inverter 103 shown in Fig. 1, supposes to be set in the oil production machine 50.
With reference to Fig. 3, the formation of this control device for inverter 2 is described.
Control device for inverter 2 is made of the rectification circuit 5, capacitor C1, inverter circuit 7, guidance panel 8, instruction circuit 9, inverter control circuit 21, upper end position transducer 109a and the lower end position transducer 111a that import three-phase alternating current 3.
Upper end position transducer 109a and lower end position transducer 111a are made of the photoelectric sensor that for example becomes ON under the sensitive switch that becomes ON under the situation that the jut of the end that is installed in motor 1 touches, the jut that is being installed in the end of motor 1 have interdicted the situation of light.Upper end position transducer 109a is detecting motor 1 when being positioned at upper end position on the straight line, the sensor signal of output high level.Lower end position transducer 109a is detecting motor 1 when being positioned at lower end position on the straight line, the sensor signal of output high level.
Next, with reference to Fig. 4, the detailed formation of this rectification circuit 5 with inverter circuit 7 described.
As source power supply with three-phase alternating current R, S, T is input in the rectification circuit 5, be arranged on diode D1, the D2 input R phase in the rectification circuit 5, D3, D24 input S phase, D5, D6 input T phase is after each diode and capacitor C 1 rectification smoothly, direct current is outputed to dc terminal P, N (P: positive side terminal, N: the minus side terminal).
Be connected with inverter circuit 7 at this dc terminal P, N, detailed says, switch element Q1, Q3, Q5 and diode D7, D9, D11 set in inverter circuit 7 are connected with positive side terminal P, are connected with minus side terminal N at switch element Q2, Q4, Q6 and diode D8, D10, D12.In addition, in the base stage of switch element Q1, Q2, Q3, Q4, Q5, Q6, import the 3 groups of ON/OFF signal Up, Un, Vp, Vn, Wp, the Wn that are exported from inverter control circuit 21 respectively.
Pumping cylinder 113 shown in Figure 2 is set in the underground pump, for example has about 10 tons weight, is positioned at underground 1800m place by cable 117.
Next, with reference to Fig. 5, the detailed formation of guidance panel 8 and instruction circuit 9 is described.
In addition, as the display part, have segmentation monitor and 8 lamps (subsidiary each lamp and operation mode display lamp that shows that Ctrl, MPa, V, %, rpm, A, Hz are arranged).These all are made of LED, and the segmentation monitor demonstrates state of mode of operation and parameter numbering and set point thereof, inverter control circuit 21 etc.
In addition, in the guidance panel 8, also use numerical key and ENTER key, come the incoming frequency value, so should value export to instruction circuit 9 as frequency instruction.
Next, instruction circuit 9 is connected with upper end position transducer 109a and lower end position transducer 111a, and upper end position signal and lower end position signal are alternatively inputed to repetition just changes/reverse indicating device 10.In addition, from guidance panel 8 input running instruction and frequency instructions, and generated frequency instructs and voltage instruction in view of the above, exports to inverter control circuit 21.
In detail, instruction circuit 9 constitutes by just changeing/reverse instruction device 10, acceleration and deceleration adjuster 11, frequency mode memory 12, voltage instruction value generator 15 these functional modules.
Just change/reverse instruction device 10, imported after the running instruction by guidance panel 8, according to upper end position signal and lower end position signal from upper end position transducer 109a, lower end position transducer 111a, the dir signal is just changeed the sign of (decline) direction or counter-rotating (rising) direction as expression, export to acceleration and deceleration adjuster 11.In addition, just change/reverse instruction device 10,,, export to inverter control circuit 21 sign of FR signal as the rotation direction of switching motor 1 according to output frequency instruction f1 and dir signal from acceleration and deceleration adjuster 11.
Acceleration and deceleration adjuster 11, under situation about being transfused to from the frequency instruction of guidance panel 18, the frequency mode that this frequency instruction constituted is kept in the frequency mode memory 12, under the situation of having imported the running instruction by guidance panel 8, the output frequency instruction f1 that is preserved in the read frequency mode memory 12, and just export to and change/reverse indicating device 10, voltage instruction value generator 15 and inverter control circuit 21.
In addition, the accelerating performance of the frequency f 1 that will be exported by acceleration and deceleration adjuster 11 is illustrated in Fig. 6 A, and deceleration characteristic is illustrated in Fig. 6 B.
Voltage instruction value generator 15 generates the voltage instruction value V1 of the size of the frequency instruction f1 that is exported corresponding to acceleration and deceleration adjuster 11, exports to inverter control circuit 21.In addition, the voltage/frequency property list of the voltage instruction value V1 that voltage instruction value generator 15 is exported is shown in Fig. 6 C.
Next, with reference to Fig. 7, the detailed formation of this inverter control circuit 21 is described.
Three phase sine wave producer 23, the electric angle θ according to electric angle maker 22 is exported produces three-phase sine-wave Va, Vb, Vc with this electric angle θ, exports to multiplier 24,25,26 respectively.
The voltage instruction value V1 that in multiplier 24,25,26, is exported by common input instruction circuit 9, simultaneously, three-phase sine-wave Va, Vb, Vc that three phase sine wave producer 23 is exported have been transfused to respectively, with three-phase sine-wave Va, Vb, Vc respectively and instruction magnitude of voltage V1 multiply each other, three-phase sine-wave Vu, Vv, the Vw that will have voltage instruction value V1 amplitude doubly, input to comparator 28,29,30 separately+input.
Triangular-wave generator 27 produces triangular wave carrier Vt, input to comparator 28,29,30 separately-input.
In idle time adjunct circuit 34, the ON/OFF signal Vg1, Vg2, Vg3, Vg4, Vg5, the Vg6 that are exported for comparator 28,29,30 and inverter 31,32,33, additional idle time, so that the signal of each group of Vg1 and Vg2, Vg3 and Vg4, Vg5 and Vg6 is not ON simultaneously, generate 3 groups of ON/OFF signal Up, Un, Vp, Vn, Wp, Wn that level is reciprocal, these 3 groups of ON/OFF signals are exported to inverter circuit 7.
Next, with reference to Fig. 8 A, Fig. 8 B～Figure 10, the detailed action of this control device for inverter 2 is described.
(guidance panel)
At first, according to operator's operation, the frequency instruction that will be exported from guidance panel 8 inputs to acceleration and deceleration adjuster 11, and the frequency mode that this frequency instruction constituted is saved in the frequency mode memory 12.
If press the DRIVE key that is arranged in the guidance panel 8, then the running instruction is transfused to this just changes/reverses instruction device 10 and acceleration and deceleration adjuster 11, and instruction circuit 9 becomes the state that can turn round.
In addition, after pressing the DRIVE key,, then remove the running instruction of being exported from guidance panel 8 if press the STOP key.
(the basic controlling action when just changeing)
Here, with reference to the sequential chart shown in Fig. 8 A, Fig. 8 B, action describes to the basic controlling of control device for inverter 2.
Now, motor 1 stops between the upper end position transducer 109a and lower end position transducer 111a of iron prop 121, in time t1, one presses the DRIVE key that is arranged in the guidance panel 8, just will turn round to instruct just to input to and change/reverse instruction device 10 from guidance panel 8, and will make motor 1 at the FR signal of the high level that just changes (decline) direction running, export to inverter control circuit 21.
Simultaneously, imported under the situation of running instruction being operated panel 8, read the output frequency instruction f1 that is stored in the frequency mode memory 12, just exporting to changes/indicating device 10 that reverses, voltage instruction value generator 15 and inverter control circuit 21.
Voltage instruction value generator 15 generates the voltage instruction value V1 of the size of the output frequency instruction f1 that is exported corresponding to acceleration and deceleration adjuster 11, exports to inverter control circuit 21.
Consequently, at time t1, shown in Fig. 8 A, voltage instruction value V1=35V, output frequency f1=0Hz, FR signal=1 are inputed to inverter control circuit 21 from instruction circuit 9.
Next, at time t1～t2, from instruction circuit 9 to inverter control circuit 21 input voltage command value V1=35V～180V, output frequency f1=0～5Hz, FR signal=1.
In the electric angle maker 22, the FR signal and the output frequency f1 of the high level of being exported according to instruction circuit 9, output frequency instruction f1 carried out time integral after, generate electric angle θ, and export to three phase sine wave producer 23.In three phase sine wave producer 23, the electric angle θ according to electric angle maker 22 is exported produces three-phase sine-wave Va, Vb, Vc with this electric angle θ, exports to multiplier 24,25,26 respectively.
In multiplier 24,25,26, the voltage instruction value V1 that common input is exported by instruction circuit 9, simultaneously, import three-phase sine-wave Va, the Vb, the Vc that are exported by three phase sine wave producer 23 respectively, with three-phase sine-wave Va, Vb, Vc respectively and instruction magnitude of voltage V1 multiply each other, three-phase sine-wave Vu, Vv, the Vw that will have voltage instruction value V1 amplitude doubly, input to comparator 28,29,30 separately+input.Simultaneously, in triangular-wave generator 27, produce triangular wave carrier Vt, and input to comparator 28,29,30 separately-input.
In comparator 28,29,30, three-phase sine-wave Vu, Vv, Vw that multiplier 24,25,26 is exported, the triangular carrier Vt that is exported with triangular-wave generator 27 compares, generate 3 groups of ON/OFF signal Vg1, Vg3, Vg5, in addition, by inverter 31,32,33 will be separately signal inversion, generate ON/OFF signal Vg2, Vg4, Vg6, export to adjunct circuit 34 idle time.
In dead time adjunct circuit 34, the additional idle time of ON/OFF signal Vg1, Vg2, Vg3, Vg4, Vg5, Vg6 of being exported for comparator 28,29,30 and inverter 31,32,33, so that the signal of respectively organizing of Vg1 and Vg2, Vg3 and Vg4, Vg5 and Vg6 is not ON simultaneously, generate 3 groups of ON/OFF signal Up, Un, Vp, Vn, Wp, Wn that level is reciprocal, these 3 groups of ON/OFF signals are exported to inverter circuit 7.
In addition, with the source power supply 3 of three-phase alternating current R, S T input to rectification circuit 5,, by diode D1, D2, D3, D4, D5, D6 and capacitor C 1 to its carry out rectification level and smooth after, direct current is exported to dc terminal P, N.
With inverter circuit 7 that this dc terminal P, N are connected in, by these 3 groups of ON/OFF signal Up, Un, Vp, Vn, Wp, the Wn that is exported by inverter control circuit 21, switch element Q1～Q6 is carried out ON/OFF control, respectively from the tie point of switch element Q1, Q2 with the U phase, from the tie point of switch element Q3, Q4 with the V phase,, be input in the input terminal of motor 1 the W phase from the tie point of switch element Q5, Q6.Consequently, acceleration decline (just changeing) gradually in the track of motor 1 on being arranged on iron prop 121.
Next, in time t2～t3, from instruction circuit 9 to inverter control circuit 21 input voltage command value V1=180V, output frequency f1=5Hz, FR signal=1, constant speed descends in the track of motor 1 on being arranged on iron prop 121.
Next,, change/reverse in the indicating device 10, just change/reverse indicating device 10,, and export to acceleration and deceleration adjuster 11 the dir signal inversion if will just be input to from the lower end position signal of lower end position transducer 111a at time t3.Acceleration and deceleration adjuster 11 after with the dir signal inversion, according to deceleration characteristic, instructs f1 to drop to 0Hz output frequency.
Next, in time t3～t4, from instruction circuit 9 to inverter control circuit 21 input voltage command value V1=180V～35V, output frequency f1=5Hz～0Hz, slow down gradually in the track of motor 1 on being arranged on iron prop 121, and drop near the lowest positions in FR signal=1.
(just changeing/reverse the switching of action)
Next, in moment t4, just change/reverse indicating device 10, the dir signal is inverted to high level from low level, and export to acceleration and deceleration adjuster 11, thus, according to deceleration characteristic, drop to 0Hz from the output frequency of acceleration and deceleration adjuster 11 instruction f1.Just change/reverse indicating device 10, when frequency instruction f1 becomes 0Hz, the FR signal is inverted to low level from high level, export to the electric angle maker 22 of inverter control circuit 21.
In electric angle maker 22, in case the FR signal that instruction circuit 9 is exported switches to low level from high level, the frequency instruction f1 that instruction circuit 9 is exported carries out time integral, with the electric angle θ of generation in order to advance to 360 degree (positive veer) from 0 degree, be generated as to be inverted to and advance, output it to three phase sine wave producer 23 to 0 degree (reverse directions) from 360 degree.
At three phase sine wave producer 23, the electric angle θ according to electric angle maker 22 is exported produces three-phase sine-wave Va, Vb, Vc with this electric angle θ, exports to multiplier 24,25,26 respectively.
(action during counter-rotating)
Next, in time t4～t5, the output frequency instruction f1 from acceleration and deceleration adjuster 11 according to accelerating performance, begins to rise from 0Hz.
Consequently, in the track of motor 1 on being arranged on iron prop 121, acceleration rising (counter-rotating) gradually.
Next, in time t5～t6, from instruction circuit 9 to inverter control circuit 21 input voltage command value V1=190V, output frequency f1=5.5Hz, FR signal=0, constant speed rises in the track of motor 1 on being arranged on iron prop 121.
Next,, change/reverse in the indicating device 10, just change/reverse indicating device 10, the dir signal is reversed to low level from high level, export to acceleration and deceleration adjuster 11 in case just be imported into from the upper end position signal of upper end position transducer 109a at time t6.Acceleration and deceleration adjuster 11 after the dir signal is inverted, according to deceleration characteristic, instructs f1 to drop to 0Hz output frequency.
Next, in time t6～t7, from instruction circuit 9 to inverter control circuit 21 input voltage command value V1=190V～35V, output frequency f1=5.5Hz～0Hz, slow down in the track of motor 1 on being arranged on iron prop 121 gradually in FR signal=0, rise near the position, the top always.
(switching that counter-rotating/turn is done)
Next, in moment t7, just change/reverse indicating device 10, the dir signal is inverted to low level from high level, and export to acceleration and deceleration adjuster 11, thus, the output frequency instruction f1 from acceleration and deceleration adjuster 11 according to deceleration characteristic, drops to 0Hz always.Just change/reverse indicating device 10, when frequency instruction f1 has become 0Hz, the FR signal is inverted to high level from low level, export to the electric angle maker 22 of inverter control circuit 21.
In electric angle maker 22, in case the FR signal that instruction circuit 9 is exported switches to high level from low level, the frequency instruction f1 that instruction circuit 9 is exported carries out time integral, with the electric angle θ of generation in order to advance to 0 degree (reverse directions) from 360 degree, be generated as to be inverted to and advance, output it to three phase sine wave producer 23 to 360 degree (positive veer) from 0 degree.
In three phase sine wave producer 23, the electric angle θ according to electric angle maker 22 is exported produces three-phase sine-wave Va, Vb, Vc with this electric angle θ, exports to multiplier 24,25,26 respectively.
(action of electric angle maker)
Below with reference to the sequential chart shown in Fig. 9 A, the 9B, the action of electric angle maker 22 is described.
Shown in Fig. 9 A, export to the output frequency instruction f1 of electric angle maker 22 from instruction circuit 9, switch to low level and switch to moment of high level from high level at the FR signal from low level, become 0Hz.
In detail, switch under the situation of high level from low level at the dir signal, shown in the time t3～t4 among Fig. 8 A, the output frequency instruction f1 that instruction circuit 9 is exported descends to 0Hz gradually from 5Hz, and as the electric angle θ of the time integral of output frequency instruction f1, shown in Fig. 9 B, electric angle θ becomes big from 0 degree slowly to 360 degree.
Next, in electric angle maker 22, input FR signal, at time t4, the FR signal switches to low level from high level, shown in time t4～t5, output frequency that instruction circuit 9 is exported instruction f1 rises to 5.5Hz gradually from 0Hz, and as the electric angle θ of the time integral of output frequency instruction f1, shown in Fig. 9 B, electric angle θ diminishes to 0 degree gradually from 360 degree.
(action of three phase sine wave producer)
Below with reference to sequential chart shown in Figure 10, the action of three-phase sine-wave 23 is described.
Three phase sine wave producer 23, according to the electric angle θ that electric angle maker 22 is exported, generation has this electric angle θ, and θ+0 is spent, different three-phase sine-wave Va, Vb, the Vc of electric angle difference of θ+120 degree, θ+240 degree.
In detail, switch to from high level under the low level situation at the FR signal, shown in the time t3～t4 as shown in Fig. 8 A, output frequency instruction f1 descends to 0Hz gradually from 5Hz, and the electric angle θ that electric angle maker 22 is exported becomes big from 0 degree gradually to 360 degree.
Switch to from high level the low level time t4 at the FR signal, given this electric angle θ=θ 1 in three phase sine wave producer 23, therefore, three-phase sine-wave Va, Vb, Vc become θ+0 degree, θ+120 degree, θ+240 degree respectively, also promptly, electric angle becomes θ+0 degree, θ+120 degree, θ+240 degree.
In addition,, after switching to low level, high level advances after the electric angle θ of sinusoidal wave Va, Vb, Vc is anti-phase from the FR signal.Also promptly, shown in the time t4～t5 among Fig. 8 A, output frequency instruction f1 rises to 5.5Hz gradually from 0Hz, and the electric angle θ that electric angle maker 22 is exported diminishes to 0 degree gradually from 360 degree.
Switch to from high level the low level time t4 at the FR signal, given this electric angle θ=θ 1 in three phase sine wave producer 23, in time t4～t5, advance after the electric angle θ of sinusoidal wave Va, Vb, Vc is anti-phase, therefore, three-phase sine-wave Va, Vb, Vc are respectively by θ+0 degree, advance after θ+120 degree, θ+240 degree are anti-phase.
Consequently, in the multiplier 24,25,26, three-phase sine-wave Va, the Vb that three phase sine wave producer 23 is exported, Vc multiply by three-phase sine-wave Va, Vb, Vc respectively to voltage instruction value V1 after switching according to the FR signal, as shown in figure 10, output three-phase sine-wave Vu, Vv, Vw.Finally, motor 1 quickens to rise on the track that is arranged on the iron prop 121 gradually.
Like this, according to the control device for inverter described in the present embodiment 2, detect motor 1 by upper end position transducer 109a and be positioned at upper end position on the straight line, detect motor 1 by lower end position transducer 111a and be positioned at lower end position on the straight line,, will be saved in the frequency mode memory 12 from guidance panel 8 input instructions or numerical value according to operation by the frequency mode that guidance panel 8 is imported.Further, by just changeing/reverse indicating device 10, according to sensor signal from upper end position transducer 109a or lower end position transducer 111a, the direction signal of output expression descent direction or ascent direction, simultaneously, after this direction signal counter-rotating, when the output frequency command value from acceleration and deceleration adjuster 11 becomes 0Hz, with switching signal counter-rotating and output.By acceleration and deceleration adjuster 11, whenever from direction signal when counter-rotating of just changeing/reversing indicating device 10, the output frequency command value is reduced to after the 0Hz according to frequency mode, its continuation is risen from 0Hz.Produce voltage instruction value by voltage instruction value generator 15 according to frequency mode.According to from the switching signal of just changeing/reversing indicating device 10, the output frequency command value from acceleration and deceleration adjuster 11 is carried out time integral by electric angle maker 22, generate electric angle.By three phase sine wave producer 23, produce corresponding to baseline sinusoidal wave from the electric angle of electric angle generator 22.Further, produce triangular signal by triangular-wave generator 27, by comparator 28,29,30 (pwm unit), according to from the baseline sinusoidal wave of three phase sine wave producer 23 and triangular signal from triangular-wave generator 27, the production burst bandwidth modulation signals, thus, when inverter circuit 7 is controlled, can carry out descending or action when dropping to the direction conversion of rising of motor 1 smoothly from rising to, consequently, can reduce mechanical damage, prolong the life-span of motor 1.
In addition, make and to be arranged on underground pumping cylinder and to move up and down by pump and recover the oil, couple together by cable 117 with pumping cylinder 113 being arranged on motor on the ground 1, control motor 1 by control device for inverter 2, moving up and down of motor 1 passed to pumping cylinder 113, allow the pump knee-action recover the oil, thus, can pass through control device for inverter 2, realize smoothly from the action that rises to decline or reverse from the direction that drops to rising, consequently, can reduce mechanical damage, prolong the life-span of motor 1 and oil production machine 50.
Claims (2)
1. a control device for inverter is controlled the inverter of giving the vertical motor power supply that is provided with and moves up and down on straight line by frequency and voltage, it is characterized in that:
Have:
The upper end position transducer, its detection said motor is positioned at the upper end position on the straight line;
The lower end position transducer, its detection said motor is positioned at the lower end position on the straight line;
Operating unit, it comes the incoming frequency instruction according to operation;
The frequency mode memory cell is preserved frequency mode according to the frequency instruction of being imported by the aforesaid operations unit; And
Just change/reverse indicating member, it is according to the sensor signal from above-mentioned upper end position transducer or lower end position transducer, the direction signal of output expression descent direction or ascent direction, simultaneously, after this direction signal counter-rotating, when the output frequency command value from acceleration and deceleration adjustment unit described later becomes 0Hz, with the switching signal counter-rotating and the output of positive veer of expression or reverse directions;
The acceleration and deceleration adjustment unit, it is reduced to the output frequency command value after the 0Hz according to the said frequencies pattern whenever from the above-mentioned direction signal counter-rotating of just changeing/reverse indicating member the time, and its continuation is risen from 0Hz;
The voltage instruction value generating unit, it is according to said frequencies mode producing voltage instruction value;
The electric angle generation unit, it carries out time integral according to from above-mentioned switching signal of just changeing/reversing indicating member to the output frequency command value from above-mentioned acceleration and deceleration adjustment unit, generates electric angle;
Sinusoidal wave generating unit, it produces corresponding to the baseline sinusoidal wave from the electric angle of above-mentioned electric angle generating unit;
The triangular wave generating unit, it produces triangular signal; And
Pwm unit, it is according to from the baseline sinusoidal wave of above-mentioned sinusoidal wave generating unit and triangular signal from above-mentioned triangular wave generating unit, production burst bandwidth modulation signals;
When above-mentioned inverter is controlled, can carry out descending or action when dropping to the direction conversion of rising of said motor smoothly from rising to.
2. oil production machine, the control device for inverter that it has described in claim 1 is characterized in that,
Have and be arranged on underground and move up and down the pump that pumping cylinder recovers the oil;
Said motor and above-mentioned pumping cylinder with being arranged on the ground couple together by cable, control said motor by above-mentioned control device for inverter, moving up and down of said motor passed to pumping cylinder move said pump and recover the oil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004153502A JP4063251B2 (en) | 2004-05-24 | 2004-05-24 | Inverter control device and oil collecting machine equipped with this inverter control device |
| JP2004153502 | 2004-05-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1702957A CN1702957A (en) | 2005-11-30 |
| CN100379144C true CN100379144C (en) | 2008-04-02 |
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ID=35494604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100721928A Expired - Fee Related CN100379144C (en) | 2004-05-24 | 2005-05-23 | Inverter controller and oil extraction machine having the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4063251B2 (en) |
| CN (1) | CN100379144C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359797C (en) * | 2005-12-13 | 2008-01-02 | 盘锦北申智能控制有限公司 | Method for operating flexible powering frequency changing regulating speed control apparatus of direct control oil pumping unit |
| JPWO2008075532A1 (en) * | 2006-12-18 | 2010-04-08 | 株式会社安川電機 | Inverter device and control method thereof |
| CN104009700A (en) * | 2014-06-07 | 2014-08-27 | 际华三五四二纺织有限公司 | Yarn detection and control circuit of strength tester |
| CN111277176B (en) * | 2020-02-20 | 2022-07-29 | 西北工业大学 | Double-motor group cooperative control system and control method based on double current sensors |
| CN115199170B (en) * | 2022-07-19 | 2024-03-12 | 安徽海尚变频技术有限公司 | Control method for high-precision hovering band-type brake of door machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH117712A (en) * | 1997-06-17 | 1999-01-12 | Funai Electric Co Ltd | Disc device |
| JPH11149318A (en) * | 1997-11-18 | 1999-06-02 | Seiko Precision Inc | Motor control method, motor controller and time recorder provided with the motor controller |
| CN1347193A (en) * | 2000-10-10 | 2002-05-01 | 三垦电气株式会社 | Inverter device |
| JP2003224988A (en) * | 2002-01-25 | 2003-08-08 | Sharp Corp | Spindle motor stop controller for disc apparatus |
-
2004
- 2004-05-24 JP JP2004153502A patent/JP4063251B2/en not_active Expired - Fee Related
-
2005
- 2005-05-23 CN CNB2005100721928A patent/CN100379144C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH117712A (en) * | 1997-06-17 | 1999-01-12 | Funai Electric Co Ltd | Disc device |
| JPH11149318A (en) * | 1997-11-18 | 1999-06-02 | Seiko Precision Inc | Motor control method, motor controller and time recorder provided with the motor controller |
| CN1347193A (en) * | 2000-10-10 | 2002-05-01 | 三垦电气株式会社 | Inverter device |
| JP2003224988A (en) * | 2002-01-25 | 2003-08-08 | Sharp Corp | Spindle motor stop controller for disc apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005341651A (en) | 2005-12-08 |
| JP4063251B2 (en) | 2008-03-19 |
| CN1702957A (en) | 2005-11-30 |
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