CN2234522Y - Passive numerically-controlled proportional valve amplifier - Google Patents
Passive numerically-controlled proportional valve amplifier Download PDFInfo
- Publication number
- CN2234522Y CN2234522Y CN 94248326 CN94248326U CN2234522Y CN 2234522 Y CN2234522 Y CN 2234522Y CN 94248326 CN94248326 CN 94248326 CN 94248326 U CN94248326 U CN 94248326U CN 2234522 Y CN2234522 Y CN 2234522Y
- Authority
- CN
- China
- Prior art keywords
- passive
- numerical control
- proportional valve
- pin
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a passive numerical control proportional valve amplifier. The end b of a passive numerical control network NN is connected with one end of power supply u, and the end a is connected with the end a' of the coil curl of the proportional valve; the other end of the coil curl is connected with the power supply u to form the driving loop of the proportional valve. Both ends of an oscillator OSC are respectively connected with both of the two ends of the power supply u, and the output end is connected with the end c of the passive numerical control network N/N. The passive numerical control proportional valve amplifier combines digital-to-analog conversion and power amplification into one. An equivalent two-port network composed of a high-power passive device simultaneously realizes the digital-analog conversion and the power amplification and realizes that pulse current and a generator for greatly oscillating currents provide oscillating signals for the proportional valve to normally operate and the greatly oscillating current for eliminating fastening faults.
Description
The utility model relates to a kind of digital control type power amplifier that is used for driving all kinds of electro-hydraulic proportional valves.
In background technique, electro-hydraulic proportional valve is widely used aspect industrial control, for driving electro-hydraulic proportional valve, needs the light current control signal is zoomed into the curtage signal with certain power in proportion, and this function is finished by proportional amplifier usually.Occasion adopting microcomputer, programmable controller and other digital controllers to control also needs links such as D/A digital-to-analog conversion or PWM pulsewidth modulation between controller and the amplifier.Digital-to-analog conversion and power amplification are finished respectively, and are mainly realized by active electronic device such as operational amplifier.The component number that this class Active Digital amplifier adopts is many, and reliability is not ideal enough, and price is higher.In many industrial applications, also need adopt chopping mode, Proportional valve divides the retaining operation, only be operated on the different operation point of several amplitudes, the requirement of pair amplifier is reliable, inexpensive, and can manually operate with mechanical, electrical easily, existing amplifier can not satisfy the requirement of this respect well.When electro-hydraulic proportional valve generation bite fault, available one significantly oscillating current get rid of, but existing proportional amplifier does not all directly possess this function.
The technical solution of the utility model is: a of passive numerical control network NN end links to each other with the coil a ' end of Proportional valve PV, and the coil a ' end of Proportional valve PV is through oscillation switch K significantly
1Link to each other with the d end of passive numerical control network NN, the other end of Proportional valve PV coil is through diverter switch K
2Link to each other with the end of power supply u, the b end of passive numerical control network NN links to each other with the other end of power supply u, forms the driving loop of Proportional valve; The two ends of oscillator OSC link to each other with the two ends of power supply u, and the output terminal of oscillator OSC links to each other with the c end of passive numerical control network NN.It is the two-port network NN that forms an equivalence with high-power passive electronic components and parts, outside light current digital signal can be passed through high input impedance or electrical isolation mode, change the on off operating mode that has each branch road of different resistance values (weights) in the network, thus the C-V characteristic of control two-port network (ab port); When a end links to each other with the coil of Proportional valve (or proportion electro-magnet), the other end of Proportional valve PV links to each other with the end of power supply u through diverter switch, the other end of power supply u directly links to each other with the b end, when forming the driving loop of Proportional valve, can disposablely finish two functions of power amplification of digital-to-analogue conversion and signal; Simultaneously, be attempted by the oscillator OSC at power supply u two ends, its output terminal c end links to each other with the HR high resistance input end of passive numerical control network NN, export a square signal, the Dither component that requires when producing a proper functioning in driving the loop then can provide the oscillating current significantly of fixing a breakdown when the bite fault.
The utility model is compared the useful effect that has with background technique:
1. uniting two into one owing to adopt passive component, and with digital-to-analog conversion and power amplification link significantly reduces the components and parts sum, and not only reliability improves, and simple in structure, the cost reduction;
2. digital signal can be directly accepted in method of operation variation, and also available mechanical, electrical manually-operable can also can design or operate in branch retaining working method with continuous incremental system work; Hardware need be do not added, control of proportion directional valve and multichannel control can be realized;
3. external control signal can trigger significantly oscillating current, and amplifier has the ability of certain online eliminating Proportional valve bite fault;
4. owing to adopt diverse network topological structure and impedor,, can realize the variable-gain function by optimal design with different C-V characteristics.
The utility model volume is little, easily realizes the electromechanical integration of Proportional valve and amplifier.
Below in conjunction with accompanying drawing,, provide details of the present utility model by description to embodiment.
Fig. 1. structured flowchart of the present utility model;
Fig. 2. the circuit theory diagrams of the present utility model of parallel-connection structure;
Fig. 3. the passive numerical control network circuit theory diagrams of cascaded structure;
Fig. 4. the passive numerical control network of series and parallel mixed construction connects block diagram.
As shown in Figure 1, V
1, V
2... V
N-2Be n-2 bit digital control signal, V
N-1Be oscillation control signal significantly, V
nBe direction or channel switch control signal, V
1～V
nCan form a n position control word (byte), send by microcomputer or other controllers.NN is the digital control type power amplifier network of being made up of high-power passive impedance element, and OSC is an oscillator, K
1Be oscillation switch significantly, K
2Be direction or passage diverter switch, u is for exchanging or DC electrical source, and PV is proportion electro-magnet or electro-hydraulic proportional valve, and NNA is a passive numerical control Proportional valve amplifier of the present utility model.
External signal V
1～V
nCan directly add to NNA, each input port all has high input impedance character or process electrical isolation.The waveform signal of oscillator OSC output adds to the NN network through the c end, and the c end has high input impedance character, so a of NN network, b two ends are two-terminal networks of an equivalence.The a end of this two-terminal network is in series with the coil of Proportional valve PV, through K
2The back is connected with power supply u, and the b end then links to each other with the other end of power supply u, forms the driving loop of Proportional valve.Oscillator OSC is a relation in parallel with driving the loop, promptly is connected the two ends of power supply u.
As shown in Figure 2, provide the circuit theory diagrams of the present utility model of parallel-connection structure.It comprises by high-power resistance R
1～R
7Respectively with high-power switch tube T
1～T
7The passive numerical control equivalent two port NN2 that again 7 friendly roads of series connection is composed in parallel after the series connection, two ports of NN2 are R
1～R
7The a end and the T that link to each other
1～T
7The b end that links to each other, high-power resistance R
7Two ends and be connected to significantly oscillation switch K
1Oscillator OSC is by chip 555, capacitor C
1, C
2, diode D
1, D
2, potentiometer W forms, 555 1 pin ground connection, and 5 pin are through C
1Ground connection, 2 pin link to each other with 6 pin afterwards and C
2One end and D
1Negative end, D
2Forward end link to each other C
2Hold ground connection, D in addition
1Forward end link to each other D with 555 7 pin and the movable end of potentiometer W
2The fixed end of negative sense termination W, another fixed end of W connects 555 8 pin and 4 pin simultaneously; The resistance R of forming mu balanced circuit
8, R
9With reference diode D
3Be connected to 555 8 pin, voltage-stabiliser tube and R after linking to each other
9Hold ground connection, R in addition
8In addition termination diverter switch K
2And be connected to the ABAP Adapter anode; The b end of passive numerical control equivalent two port NN2, the ground end of oscillator OSC all are connected to the negative terminal of ABAP Adapter, and a end of NN2 then links to each other with the coil of Proportional valve PV, and the end in addition of PV coil all meets diverter switch K
2, output terminal 3 pin of chip 555 are resistance and the T of R by resistance
7Link to each other T
1～T
6Then be the external digital controlled signal V of resistance of R by resistance
1～V
6
Digital quantity or switching value control signal V
1～V
5, dead band current controling signal V
6, can directly control T through resistance R
1～T
6Conducting or end, make a, b two-port network have corresponding C-V characteristic, power supply is by this network during with branch road that the Proportional valve coil connect, generation and digital control amount V
1～V
5The driving current of proportion relation, thus digital-to-analog conversion and two functions of power amplification finished once.The square wave that oscillator OSC produces, its output signal is at c end control high-power switch tube T
7Break-make, through R
7In the Proportional valve coil, produce a vibrating signal, make Proportional valve energy proper functioning.When Proportional valve generation bite, can be by controller or manually send a control level V
7, with K switch
1Close, then T
7Break-make alternately under the effect of c end square signal produces the oscillating current of a maximum amplitude in coil, try hard to online fixing a breakdown.K
2Be the direction selector switch of proportion directional valve, V
1～V
8Can be 8 position digital signals that microcomputer or other digital controllers send, also can be the mechanical, electrical switching signal of manually sending.
As shown in Figure 3, provide the passive numerical control network circuit schematic diagram of cascaded structure.It is by high-power resistance R
10～R
13Series connection, each high-power resistance two ends is paralleling switch (K respectively
3～K
6) the passive numerical control equivalent two port NN1 of the cascaded structure formed.K
3～K
6V can be realized by switching elements such as relays
9～V
12Be the external digital control signal, remaining part is identical with Fig. 2 with working procedure in the circuit, no longer repeats to draw.
As shown in Figure 4, provide the passive numerical control network NN of passive numerical control network NN1 of series connection and passive numerical control network NN2 mixed construction in parallel.
Claims (4)
1. passive numerical control Proportional valve amplifier NNA is characterized in that: a end of passive numerical control network NN links to each other with the coil a ' end of Proportional valve PV, and the coil a ' end of Proportional valve PV is through oscillation switch K significantly
1Link to each other with the d end of passive numerical control network NN, the other end of Proportional valve PV coil is through diverter switch K
2Link to each other with the end of power supply u, the b end of passive numerical control network NN links to each other with the other end of power supply u, forms the driving loop of Proportional valve, and the two ends of oscillator OSC link to each other with the two ends of power supply u, and the output terminal of oscillator OSC links to each other with the C end of passive numerical control network NN.
2. passive numerical control Proportional valve amplifier NNA according to claim 1, it is characterized in that: it comprises by high-power resistance R
1～R
7Respectively with high-power switch tube T
1～T
7The passive numerical control equivalent two port NN2 that again 7 series arms is composed in parallel after the series connection, two ports of NN2 are R
1～R
7The a end and the T that link to each other
1～T
7The b end that links to each other, high-power resistance R
7Two ends and be connected to significantly oscillation switch K
1Oscillator OSC is by chip 555, capacitor C
1, C
2, diode D
1, D
2, potentiometer W forms, 555 1 pin ground connection, and 5 pin are through C
1Ground connection, 2 pin link to each other with 6 pin afterwards and C
2One end and D
1Negative end, D
2Forward end link to each other C
2Hold ground connection, D in addition
1Forward end link to each other D with 555 7 pin and the movable end of potentiometer W
2The fixed end of negative sense termination W, another fixed end of W connects 555 8 pin and 4 pin simultaneously; The resistance R of forming mu balanced circuit
8, R
9With reference diode D
3Be connected to 555 8 pin, voltage-stabiliser tube and R after linking to each other
9Hold ground connection, R in addition
8In addition termination diverter switch K
2And be connected to the ABAP Adapter anode; The b end of passive numerical control equivalent two port NN2, the ground end of oscillator OSC all are connected to the negative terminal of ABAP Adapter, and a end of NN2 then links to each other with the coil of Proportional valve PV, and the end in addition of PV coil all meets diverter switch K
2, output terminal 3 pin of chip 555 are resistance and the T of R by resistance
7Link to each other T
1～T
6Then be the external digital controlled signal V of resistance of R by resistance
1～V
6
3. passive numerical control Proportional valve amplifier NNA according to claim 1, it is characterized in that: it comprises by high-power resistance R
10～R
13Series connection, each high-power resistance two ends is paralleling switch (K respectively
3～K
6) the passive numerical control equivalent two port NN1 of the cascaded structure formed.
4. passive numerical control Proportional valve amplifier NNA according to claim 1, it is characterized in that: passive numerical control network NN is the mixed construction of series network NN1 and parallel network NN2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94248326 CN2234522Y (en) | 1994-12-21 | 1994-12-21 | Passive numerically-controlled proportional valve amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94248326 CN2234522Y (en) | 1994-12-21 | 1994-12-21 | Passive numerically-controlled proportional valve amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2234522Y true CN2234522Y (en) | 1996-09-04 |
Family
ID=33853288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94248326 Expired - Fee Related CN2234522Y (en) | 1994-12-21 | 1994-12-21 | Passive numerically-controlled proportional valve amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2234522Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013868A (en) * | 2010-11-30 | 2011-04-13 | 中山大学 | Numerical control variable inductance |
| CN102900880A (en) * | 2012-10-17 | 2013-01-30 | 北京机械设备研究所 | Multi-channel proportional valve controller |
-
1994
- 1994-12-21 CN CN 94248326 patent/CN2234522Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013868A (en) * | 2010-11-30 | 2011-04-13 | 中山大学 | Numerical control variable inductance |
| CN102013868B (en) * | 2010-11-30 | 2013-11-20 | 中山大学 | Numerical control variable inductance |
| CN102900880A (en) * | 2012-10-17 | 2013-01-30 | 北京机械设备研究所 | Multi-channel proportional valve controller |
| CN102900880B (en) * | 2012-10-17 | 2013-11-27 | 北京机械设备研究所 | Multi-channel proportional valve controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107769573B (en) | The WPT system constant current constant voltage of bilateral LCC network exports adjustable parameter setting method | |
| CN100586008C (en) | Switch amplifier and its modulation method | |
| CN101303396B (en) | System for monitoring fuel battery performance | |
| CN107634655A (en) | A kind of Novel DC electric power electric transformer topology that removing solid capacity is autotomyed with failure | |
| CN104393758A (en) | Hysteretic controlled buck-boost converter | |
| CN101621202B (en) | Controller of high-voltage chain type static and synchronous compensator | |
| CN109687717A (en) | A kind of power adjustable LC input series and output parallel commutator transformer and control method | |
| CN110289765A (en) | A kind of the DAB type commutator transformer submodule topology and its control method of high power density | |
| CN204538966U (en) | A kind of high power DC I/O reversible transducer | |
| CN1728551B (en) | Controller capable of adjusting and controlling width of pulse | |
| CN102545633B (en) | Multipath high-voltage output circuit sharing reference high-voltage source | |
| CN2234522Y (en) | Passive numerically-controlled proportional valve amplifier | |
| CN104283587B (en) | A kind of energy and information time-division composite transmission system with common mode current inhibition ability | |
| CN101291106B (en) | Sampling method for adjusting duty ratio | |
| CN100486154C (en) | Fourth-order network multi ring surface chaos circuit and its use method | |
| CN1262551A (en) | Dual-output power supply with high voltage stability and high precision | |
| CN102566642B (en) | High-voltage voltage-regulating circuit | |
| CN109831189B (en) | Single-channel output circuit with selectable voltage or current | |
| CN2423642Y (en) | Adjusting reactor | |
| CN1710790B (en) | Control system capable of regualting pulse width of multiple switch changer | |
| CN102164030A (en) | Single-port communication circuit and communication method thereof | |
| CN208479477U (en) | A kind of bidirectional current transformer | |
| CN2289345Y (en) | Constant power supply | |
| CN107124106B (en) | A kind of mixing control method and device suitable for bidirectional DC-DC converter | |
| CN109067391A (en) | A kind of high-power current-control type negative resistance for resonance circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |