CS243381B1 - Circuit for connection of a two-phase contactless converter across a minicomputer - Google Patents

Abstract

The essence of the solution lies in tas. the generator the excitation function is to output the outputs connect to another flowing exciter inputs of at least one two-phase block contactless accelerator. Outputs of this resp. These blocks are connected in series with inputs analog and multiplexer, its * analog the output is connected to an analog block input -dial converter. Group address the analog and multiplexer input is connected to the bus address wires of the computer. Group two-way output of analogue block converter is connected to data converter and bus control wires and a computer.

Description

(54) Circuit for connecting a two-phase contactless converter to a microcomputer

The essence of the solution lies in tas. the excitation generator is connected to other associated excitation inputs of at least one block of a two-phase contactless acceptor. Outputs of this resp. These blocks are connected in series with and inputs of the analogue aultiplexer, its * analog output is connected to the inputs of the analog-to-digital converter block. The group address input of the analog aultiplexer is connected to the address wires of the bus and the computer. Analog-to-analog converter block bi-bi-directional output It is connected to the data and control wires of the bus and microcomputer.

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The invention relates to a circuit for connecting a two-phase contactless converter to a microcomputer.

*

In the development of control and measurement systems, there is a need to convert the angle of rotation information of a two-phase contactless converter into digital form and to make this data available to a microcomputer for further processing.

In the prior art, the evaluation of the data of a two-phase contactless converter was performed using a zero-crossing comparator and metering counters that contained position data.

Depending on the excitation function, they may have been preceded by a first harmonic filter. This solution led to the circuit's demandingness as well as the necessity to precisely set more tuned circuits, filter, comparator of zero crossing etc.

These disadvantages are eliminated by the circuit for connecting a two-phase contactless converter to a microcomputer according to the invention, which consists in that the excitation function generator is connected by its excitation outputs to its respective excitation inputs of at least one block of a two-phase contactless converter.

Outputs of this resp. These blocks are connected in series to the inputs of the analog multiplexer, whose analog output is coupled to the input of the analog-to-digital converter block.

The group address input of the analog multiplexer is connected to the address wires of the microcomputer bus.

The group bi-directional output of the analog-to-digital converter block is connected to the data and control wires of the microcomputer bus.

The advantage of a circuit for connecting a two-phase contactless converter to a microcomputer also according to the invention over the known wiring lies in the soda water management of the circuit solution, ie increasing the number of components, increasing reliability, reducing adjustment costs, reducing power consumption and increasing reproducibility. nor the zero-crossing comparator.

In the attached drawing there are two examples of a circuit for connecting a two-phase contactless converter to a microcomputer according to the invention. - '

Fig. 1 is a first example of a complete circuit diagram in a block diagram for connecting two two-phase contactless converters; Fig. 2 shows a block diagram of a generally x-th, two-phase contactless converter; Fig. 4 shows an alternative solution of the generally x-th two-phase contactless converter.

The generator 100 actuates the functions of FIG. 1) is coupled to its respective drive inputs 16 by its excitation outputs 101, 102, 103, 104. The block 2 of the first two-phased contactless converter is coupled to them and the actuating inputs g1, gg, gg, 24 of the block 2 of the second two-phased contactless converter are connected to them.

Sample output 105 and resp. The excitation function generator 100 is connected to the samping inputs 24, 21 ' £ g, gg, blocks £, g of a two-phase contactless converter. Two outputs £ X> 1 &> respectively. 21 »2S of block £ resp. g of a two-phase contactless converter are also connected in series to the inputs 201. 202. 203. the analogue multiplexer g £ g, whose analog output>

311 It is applied to the input 301 of the analog-to-digital converter block 300.

The group bi-directional output 302 of the analog-to-digital converter block 222 is connected to the data and control wires 402 of the microcomputer bus 400. The address wires 401 of this microcomputer bus 400 are coupled to the group address input 210 of the analog multiplexer 200. Blocks X, X of the first and second two-phase contactless converters / FIG. 2) are connected with their excitation inputs XX, JX, XX, XI and iX, ϋ, XX, 2 £ / generally in the x-th two-phase contactless converter XI SX. Si, χχ / There are also inputs 310.} 20. 330. 340 of a two-phase contactless converter 30 and their sampling input X1 and B5 respectively. X £ and X £, respectively.

/ generally Kj5 resp. X6 /. is also the sampling input 430. resp. 530. first, respectively. second sampling amplifier respectively. £ 0 ,.

The phase outputs 350, 360 of the two-phase contactless converter are coupled to their respective inputs 410, 420 of the first sampling amplifier 60 and at the same time are coupled to the corresponding inputs 510, 520 of the second sampling amplifier 60.

The outputs 440 and 540 of the first and second sampling amplifiers XX and £ X are simultaneously two outputs | 7. XX, respectively. Sl, S & X7. X of block X, 1 s of two-phase contactless converter.

In a second example of a circuit for connecting a two-phase contactless converter to a microcomputer according to the invention / FIG. 3), the excitation function generator 100 by its excitation outputs 17, 102, 103, 104 is coupled to their respective excitation inputs IX, XX, XX, XX of the first block χ of a two-phase contactless converter and is coupled to their respective excitation inputs 21, 22 23, 24 of the second block X of a two-phase contactless converter.

The sampling output 105 of the excitation function generator 100 is coupled to the sampling input 303 of the analog-to-digital converter block 300, which is also the sampling input 730 of the sampling amplifier 70.

Two outputs IX, 18.raso. 27 of the first block X, respectively. of the second block X, the two-phase contactless converter are connected in series with the inputs 201. 202. 203. an analog multiplexer 200 whose analog output 211 is coupled to an input 301 of an analog-to-digital converter block 300 that is also an input 710 of a sampling amplifier JX;

The output 740 of the sampling amplifier 70 is coupled to the input 610 of the A / D converter whose group bidirectional output 620 is also the group bidirectional output X2X of the A / D converter block 300.

The group bi-directional output 302 of this analog-to-digital converter block 300 is connected to the data and control wires 402 of the microcomputer bus 400. The address wires 401 of the microcomputer bus 400 lead to the group address input 210 of the analog multiplexer 222 *.

The χ, X blocks of the first and second two-phase contactless converters are connected so that their drive inputs χχ, χχ, 1X, X £, XX, 2X, XX, 2X / generally for the x-th two-phase contactless inverter JJX. £ 2, Ni, SS / 3 ^SOU simultaneously inputs XX XX XX XX XX biphasic contactless converter whose phase output 350. 360 are also two outputs XZ IX. Sl, XX resp. SI. SX blocks χ, X, resp. X two-phase contactless inverter.

The function of the circuit for connecting a two-phase contactless converter to a microcomputer is similar in both wiring examples.

The generator 100 generates an excitation function u, at its excitation outputs X2X, XXX.

· ^{F / t /} aax and at its excitation outputs 103, 104 the excitation function u _2. · ^u 2 ^{3 U} max f / t- -5- /.

At the phase outputs of 350 · 360 of each two-phase brushless inverter 30 is generated by the voltage ^at OUT ^{3 u} * ^s * ^{and "+} Uj · 00a and wherein a rotation angle of the shaft two-phase brushless transducers> · can be deduced that the sampling of the output voltage u _y y _gt using sampling amplifiers 40. resp. 50 at a suitable time t, a sample of this voltage at _yzl or t is _shown . u _yz2 equals:

at,". ³ U '· · sin o vzl max

U ^and U * '· COS and vz2 max

Said voltage samples at _yz , _yz2 are available for further processing by the microcomputer in the wiring example of FIGS. 1 and 2 via the analog multiplexer 200, the analog-to-digital converter block 300, and the microcomputer bus 400, respectively. 3 and 4 through an analog-to-digital converter block 300 and a microcomputer bus 400.

To avoid the influence of the transformation ratio of the contactless two-phase converters 30 determine the rotation angle from the ratio of voltage samples: VZ1 ^u / u _yz2 = tan a, i.e. CTG ^^ _{u? Z]} / _{u? I2.}

The solution of the invention is suitable for use in computing, measuring and control technology wherever the angle of rotation of the shaft of a two-phase contactless converter needs to be measured and processed in digital form.

Claims (3)

SUBJECT OF THE INVENTION A circuit for connecting a two-phase contactless converter to a microcomputer comprising an excitation function generator, at least one two-phase contactless converter block, an analog multiplexer and an analog-to-digital converter block, characterized in that the excitation function generator (100) is its excitation outputs (101, 102). , 103, 104 / connected to their respective excitation inputs (11, 12, 13, 14 ....... XI, X2, X3, X4) of at least one block (1, ..... X) of two-phase contactless converter, whose two outputs (17, 18 ...... X7, X8) are connected in series with the inputs (201, 202 ...... Y1, Y2) of the analog multiplexer (200), whose analog output (211) is connected to the input (301) of the block (300) of the analog-to-digital converter whose group bi-directional output (302) is connected to the data and control wires (402) of the microcomputer whose address wires (401) are connected to the group address input (210) of analog multiplexer (200). 2. A circuit for connecting a two-phase contactless converter to a microcomputer according to claim 1, characterized in that the sampling outputs (105, 106) of the generator (100) are connected to their respective sampling inputs (15, 16, ... X5). X6 / of at least one block / 1, ...., X / of a two-phase contactless converter, wherein the drive inputs / 11, 12, 13, 14, ...., XI, X2, X3, X4 / of each block / 1, ...., X / of a two-phase contactless converter are also inputs (310, 320, 330, 340) of a two-phase contactless converter (30) whose phase outputs (350, 360) are connected to their respective inputs (410, 420) of the first and (510, 520) of the second sampling amplifier (40 and 50), and the outputs (440, 540) of the first and second sampling amplifier (40, 50) there are also two outputs / 17, 18, ··., 17, X8 / block / 1, ..., X (a two-phase contactless converter, whose sampling inputs (15, 16 ..... X5, X6) are respectively the sampling inputs (430, 530) of the first and second sampling amplifiers (40, 50). 3. The circuit for connecting a two-phase contactless converter to a microcomputer according to claim 1, wherein the sampling output (105) of the generator (100) excitation function is coupled to the sampling input (303) of the block (300) of the analogue / digital converter. the input (730) of the sampling amplifier (70), whose input (710) is also the input (301) of the block (300) of the analog-to-digital converter, whose group bi-directional output (302) is simultaneously the group bi-directional output (620) of the analog-digital converter (60), whose input (610) is coupled to the output (740) of the sampling amplifier (70), the longer drive inputs (11, 12, 13, 14, ...., X1, X2, X3, X4) of each block. 1, ..., X / of a two-phase contactless converter Jaou simultaneously inputs (310, 320, 330, 340) of a two-phase contactless converter (30), whose phase outputs (350, 360) are simultaneously two outputs (17, 18, ... ..X7, X8 / block / 1, ..., X / two-phase contactless converter.