SU1367125A1 - Apparatus for multimode control of stepping motor - Google Patents

Abstract

This invention relates to electrical engineering for multi-mode control of a discrete electric drive. The goal is to simplify and extend the functionality. The device contains a source of control signals 1f pulse distributor 2, connected by input buses 3 to the corresponding outputs of the source of control signals 1, having output buses 4 containing a setting device of the switching mode code 5 and a reversible ring shift register 6 connected by control buses 7 to the corresponding input buses 3, installation tires 8 - with the corresponding outputs of the setting unit code 4 o Output tires 9, having numbers equal to the product of the phase numbers of the stepper motor and the ratio of the number of cycles switching to the total number of phases, connected through the corresponding output bus 4 and amplifiers 10 with the phases of the Engine I I. The number of bits of the shift register is 6 times the number of switching cycles. The device is simplified by using only one reverse ring shift register. The flexible setting of the initial state of the motor phases expands the functional capabilities of the device. 1 il. 3 tab. § (L

Description

l

g /

with a

to

SP

7 /

one

The invention relates to the control of electrical machines and can be used for multi-mode control of a discrete drive.

The purpose of the invention is to simplify and extend the functionality,

The drawing shows the functional diagram of the device for multi-clamp control of a stepper motor "

The device contains sources 1 of control signals, a distributor of 2 pulses, connected by input buses 3 to the corresponding outputs of source 1 of control signals, its output bus 4, contains a sensor of switching modes 5 and a reversible ring shift register 6 connected by control buses 7 with appropriate front-end tires 3, installation tires 8 - with the corresponding outputs of the setting device 5, output tires 9 according to a certain law - with output tires 4, to which, via amplifiers 10, are connected the phases of the engine 11.

The device works as follows

Preliminary signal Recording, which is transmitted along the control circuit to the reversing ring shift register 6 via installation tires 8, the switching mode code is entered from the master 5 switching modes and passes to the output buses 9 o. for those output buses 9, on which there were units For each pulse from the source 1 control signals, arriving at the output

tires 3 respectively

-, with control buses 7, the code of the switching mode, not changing its structure, is shifted by one bit along the output buses 9 in the forward or reverse directions,

For a p-phase motor operating on t-cycle switching, the number of bits of the reversing ring shift register 6 (and therefore the number of bit output buses 9) must be a multiple of tons, and the numbers of the output tires 9 to which the output buses 4 are connected distributor 2 going to amplifiers 10 and

252

the phases of the stepper motor 11 are determined for each phase by the formula

t.

ha - one

- for the first phase

m „

m, - 2 - n

- for the second phase

m

m

X n

- for the fifth phase

The installation buses 8 of register 6 from setpoint controller 5 must be supplied with a code containing m bits, of which some of the bits (by the number of cycles during which each phase of the engine 11 is turned on) are units, and the remaining bits (by the number of cycles during which each motor phase is turned off) are zero, and the load code is repeated according to the number of multiples of the number of switching cycles and the number of bits of the shift register

For example, for a six-phase motor operating according to the algorithm of 2–3 t, e, with 12-cycle commutation, the minimum number of bits of the register 6 is, and the output bus numbers 9 to which the output tires 4 of the distributor 2 are attached are

 2.0 ha, -gx 1 2

ha, px2 4

 2 A, 0

t-x 12

and on the installation buses 8 of register 6 from the setting device of the 5 switching modes, a code containing 12 bits, consisting of 5 ones and 7 zeros, must be supplied, since when operating according to the algorithm 2-3, t, e, with 12-cycle switching for a six-phase motor, each phase is turned on for 5 cycles and turned off for the remaining 7 cycles. The beginning of a sequence of units is determined by the treh-initial state of the inclusion of phases

t, g x1

3

Table 1 shows the change in the state of the signals on the output tires 9 of the shift register 6 and the corresponding phase switching on for each of the 12 cycles of the switching mode of a six-phase motor operating according to algorithm 2-3, with the initial switching on of the first and second phases.

For a six-phase motor,

2-2, i.e. with 6-cycle switching, the number of bits of register 6 must be a multiple of, for example 12 Output bus numbers 9 to which output buses 4 of distributor 2 are connected, are 6

m

m, 6 b

and on the installation buses 8 of register 6, from the unit 5 of the code of the switching mode, a code must be filed containing 6 bits, consisting of 2 ones and 4 zeros, i.e. with 6-cycle commutation, for a six-phase motor, each phase of it is turned on for 2 cycles and turned off for the remaining 4 cycles. The beginning of a sequence of units is determined by the required initial state of switching on the phases. Moreover, a six-digit code. is repeated according to the number of multiplicities of the number of switching cycles and the number of bits of the shift register, i.e., two bits.

TabLo2 shows the change in the state of the signals on the output buses of the shift register and the corresponding alternation of switching on the phases for each of the 6 cycles of the switching mode of a six-phase motor operating according to algorithm 2-2, with the initial

the inclusion of the second and third phases.

For a four-phase motor operating according to algorithm 1-1, i.e. with 4-cycle switching, the number of bits of the shift register 6 must be a multiple of 4, for example 12. The output bus numbers 9 to which the output buses 4 of the distributor 2 are connected are

25

t.

one;

t.

 o 9.

-X 2 - 2;

m

G 3 3

Q

five

0

five

0

0

five

t is X 4 4,;

and the installation buses 8 of the register 6 from the setting unit 5 of the switching mode code must be given a code containing 4 bits, consisting of 1 unit and 4 zeros, since during operation according to algorithm 1-1, i.e. with 4-cycle commutation, for a four-phase motor, each phase of it is turned on during the first cycle and turned off during the remaining 3 cycles. The input to which the unit is supplied is determined by the required initial state of switching on the phase. Moreover, the four-bit code is repeated according to the number of multiples of the number of switching cycles and the number of bits of the shift register, i.e., three times.

Table 3 shows the change in the state of the signals on the output tires of the shift register and the corresponding phase switching on for each of the 4 steps of the four-phase switching mode of the engine operating according to algorithm 1-1, with the initial switching on of the fourth phase.

The application of the invention allows to simplify the device by using a single reverse ring shift register and extends the functionality by flexible installation of the initial state and the shift register switching mode and, therefore, the initial phase state of the engine.

Claims (1)

Invention Formula A device for multi-mode control of a stepper motor containing a power amplifier according to the number of motor phases, a source of control signals, a switching mode setter and a pulse distributor connected by inputs to a control signal source and a switching mode setpoint, and the outputs of power amplifiers are distinguished by 13671 Also, in order to simplify and extend the functionality, the pulse distributor consists of a reversible ring shift register with a number of bits multiple of the switching cycles, the inputs of the power amplifiers are connected to the output register mentioned 25.6 the numbers equal to the product of the phase number by the ratio of the number of switching cycles to the number of phases, the clock input, the direction inputs and the register recording resolution are connected to the control signal source, and the setup inputs are connected to the outputs of the switching mode setter. Table 3