SU604091A1 - Controllable power-diode electric motor - Google Patents

Description

The invention relates to electric machines and can be used in high-speed contactless electric drives.

Known control valve motors are known, the winding sections of the core of which 5 are connected to a power source via a bridge semiconductor switch, and the switch key inputs are connected to the outputs of the position sensor p through a logic device 1, S, and S

The engine described in 3J, according to the problem being solved and the technical essence, is closest to the invention. It contains a bridge semiconductor switch, 15 control circuits of the keys of which are connected to the sensitive elements of the rotor position sensor with a width of the signal sector 180 e. hail, through; logical elements

A common drawback of the known engines is the low level of dynamic performance, due to the fact that in the pause between the control pulses the motor is only slowed down by the load torque, which is 25

may be small, especially in the area close to idle.

The aim of the invention is to increase the dynamic performance of the engine.

This is achieved by the fact that the engine is additionally equipped with OR-NOT elements, with one of the inputs of each element OR NOT being connected to the outputs of the corresponding element of the first blocking ban, the other input to the control signal circuit, and the outputs are connected to the inputs of the corresponding power switch of the second group.

FIG. 1 shows the scheme of the proposed engine; FIG. 2 - diagrams of operation of individual elements of the engine circuit

FIG. 1 the following notation is adopted: 1 - signal core of the rotor position sensor; 2-4 - sensitive elements; 5-1О - Prohibition logical elements, 11-13 - conjunctors; 14-16pogic elements OR NOT; 17-19 disjunctors; 20-25 - power switches switches; 26-31 - reverse current diodes; 32 - engine power winding. In the diagram, -ISaiU, AND are signals from the sensitive elements of the position sensor poToppiTi tf ... the output voltages of the corresponding logical alterations; Uv is the pulse speed control signal. Sensitive elements of 2, 3, 4 rotor position sensor are connected in pairs to the inputs of logic (1X elements of the ban 5-10. The outputs of the element of the ban 5, 7, 9 are connected to the inputs of conjunctors 11, 12, 13 and to the inputs of logical elements IL1-1 -NE 14, 15, 16. The second inputs of elements 11-1 are connected to a circuit of a pulse signal controlling the iFy speed. The outputs of conjunctors 11-13 are connected to the control circuits of the upper group of synoBbLX switches 2O, 21, 22. The outputs of elements 6 and 14, 8 and 15, 10 and 16 are connected to the inputs of the disjointrs 17, 18, 19. The outputs of the disjunctors 17-19 are connected to the control circuits of the lower group of power switches 23, 24, 25. The power switches of the switch are bridged by reverse current diodes 26-31. The outputs of the arms 32 of the arms, the bridge formed by the power switches of the switch, are turned on. In addition, Prohibition 5-10, will be equal to the conjugation of the repetition of one and the negative of the other input signals.So, the voltage Ifg (see, Fig. 2) will be equal to the conjunction of repetition of the voltage tr2 and the negation of the voltage Ts and the voltage voltage C denial voltage TL-. Similarly, for voltage pairs TJ g Ug and Up,, Since the voltage at the inputs of the Inhibit elements has a duration of 180 e. hail, and shifted relative to each other by 120 al. hail., at the outputs of each pair of elements 5-10, a sequence of pulses of duration 12 o el. grad., shifted relative to each other on ISO email. hail, by which the power keys of one of the shoulders of the bridge are controlled in a certain way. The conjunctions of the signals TGU and U U and IT-, tl y and 11 o from the outputs of elements 11, 12, 13 are fed to the control circuits of the upper switch power switch keys. The key 20 controls the signal and j, and the key 21 according to the signal 11,, 2, and the signal 22. At the outputs of the logic elements ORINE 14, 15, 16, conjunctions of the voltage pulse egon of the voltage Uy 115 9 respectively are obtained, respectively, according to to the well-known rule of logic - from the disruption of the disjunction by equal to the negative conjunction, Thus, in the pause between control pulses n and if zero equal, zero 1 Ut 9, corresponding voltages 11, ili51 U i, will be equal to one. These voltages are applied to the inputs of the respective disjointrs 17 | 18, 19 to the other inputs of which signals 11, Vi jQ are received From the outputs of the Prohibition 6, 8, 10. The disjunctions of the signals If, U |, Ug, 1G, and THzs tlif) from the outputs of elements 17, 18, 19 respectively control the keys, the lower groups 23, 24, 25, Thanks to this, each key of the lower group is fully open in the switching angle interval of 120 ap. hail., as well as in the pause between controllable speech pulses in the interval + 60 el, grad., both sides of the switching interval. Thus, at any position of the rotor and the presence of a control impulse, two power keys are open, not belonging to the same shoulder of the bridge, one of which belongs to the upper and the other to the lower group. So at time t, (see FIG. 2), a pulse of speed control If y is given to the input of the schema. At the output of the logical c & we have 1 Hz and IT voltages (opening the power switches 20 and 25 respectively. The supply voltage is applied to the power winding. In the pause between the control pulses (time t), the output voltage of the logic circuit U l disappears and the voltage appears tl | g, which leads to locking power key 20 and unlocking key 24. In this case, the winding is disconnected from the power source and closed nakfotko through the keys 24, 25 and diodes 30,31. what provides the dynamic braking of the engine. when locking the cell 20, which eliminates the possibility of the flow of through currents at the moment of switching; Thus, the controlled valve motor has higher dynamic characteristics due to the introduction of dynamic braking in the pause between control pulses and higher energy performance and reliability due to the exclusion of through currents, at the same time, the design of the power switch was simplified, since there are no additional power elements.

Claims (3)

1. US patent number 3.783.359, cl. 3181254, 1973. 2. Japanese Patent No. 46-31692, cl. cl. 55 A 42, 1971. 3. US patent number 3581.702, cl. 318138, 1970.