SU1270846A1 - Rectifier electric motor - Google Patents

Description

The invention relates to electrical machines with contactless switching of the core winding section, in particular, low-speed valve electric motors (HP) with increased uniformity of shaft rotation (torque PD), and can be used, for example, in sound recording and sound reproduction equipment. The purpose of the invention is to increase the weight and dimensions of the VD and the uniform rotation of its rotor. Figure 1 shows the electrical schema of the DB; Figs. 2 and 3 show the active part of the VD, examples of execution; Figures 4 and 5 show the logic circuit of the functions. the transducer (OP), examples of version 5 in Fig. 6, are cyclograms of the signals of sensitive elements (SE) of the rotor position sensor (DPR) and the output signals of the OP. The VD (Fig. 1) contains key elements, for example, transistors, 1-8, forming inverter 9, measles with asymmetric four-section radial winding, inductor 10, DPR with signal elements 11 and SE 12 and OP 13. Inverter 9 is connected to DC source 14, which may have a midpoint. A switch 15 is provided for connecting the midpoint of the source with the common point of the winding sections. The inductor (Figures 2 and 3) is made of two bipolar circuits consisting of a magnetically soft sleeve 16 and poles 17 - permanent magnets. The angular size of the pole arc is not less than 135 PLN. hail. 462 The anchor in FIG. 2 has a magnetic core 18 with eight straight or beveled grooves and a centered concentrated winding 19 arranged in them. The anchor in FIG. 3 contains a non-skid (smooth) magnetic conductor 18 and a diametrical winding 19 laid on its inner surface 19. The beginning of the winding sections marked A, B, C, D, the ends of the sections - X, Y, Z, W. Their common point is denoted by the letter O. All winding pins are located opposite the corresponding sections. Sections B, C and D are shifted relative to section A by 90, 135 and 225 respectively. hail. In DPR, four SEs 12 are displaced relative to each other in the same way as the winding sections, and the signal element 11 is made with an angular size of 180 el. Degrees (FIG). The position of the sigil element with respect to the sensitive element in figure 1 corresponds to the position of the inductor relative to the core in figs 2 and 3. The differential element is connected to the inputs of an eight-channel FP 13. The outputs of the FP channels are connected to control electrodes of the same key elements 1-8 of the inverter 9. Reverse current inverter conventionally not shown. Four outputs of the inverter are connected to the corresponding beginnings of the winding sections. OP 13 consists of logical elements BAN, AND, OR-NOT (see figure 4 and 5). The structure and functions of the AF channels are shown in the table.

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Claims (5)

and aA-D 31 BD works as follows. As a result of the interaction of the rotor with the bark, the rotor rotates counterclockwise and logical signals a, a, a, and a are received at the OP (C is the angular position of the rotor). According to the signals from the PE, the OP produces an inverter control signal b, bg, ..., bj (see table and FIG. 6). The inverter commutes sections of the core winding, and currents flow in them (in Figures 2 and 3, the signs + and. Signify the direction of the current, and the absence of these signs - the absence of currents in the sections) As a result, the rotor, interacting with the crust, continues to rotate. In this case, for each position of the rotor, the described conditions for maintaining the constancy of the electromagnetic moment and, consequently, the frequency of the rotor rotation, are observed. These conditions are not strictly observed only in the case when the measles are made without spigot or with sloping grooves and the work of the three sections is ensured at the same time. However, even for such a construction, the pulsation of the electromagnetic moment of the proposed VD is less. Claims 1. Valve motor comprising a rotor, a stator with a four-sectional winding core, first. the second, third and fourth sections of which are connected in a star and connected to the power supply through a bridge inverter consisting of the first, second, third and fourth branches formed by the first and fifth, second and sixth, third and seventh, fourth and eighth key elements, and an inverter control device in the form of a rotor position sensor with signal and sensitive elements and a multichannel functional converter connected in input-output, with the aim of increasing and mages-dimensional display-50 rotor rotor parts, uniformity of rotation, the second, third and fourth winding sections are offset relative to the first section by 90, 135 and 225 e. hail. 55 2. An electric motor according to claim 1, in which the inverter control device is made for the group consisting of the eighth, third, fourth and seventh, in the form of a similar sequence of pulses shifted relative to the first sequence of pulses by 45 e. hail. 6. Electric motor according to claims 2 and 4, characterized in that 46 with the possibility of generating opening signals in the intervals of the rotor rotation angle for the first key element 0-135, the second 90-225, the third 135-270, the fourth 225-360, fifth 180-315, sixth 270-45, seventh 315-90, eighth 45-180el. hail. 3. An electric motor according to claim 1, characterized in that the inverter control device is configured to generate opening signals at intervals of the rotation angle of the rotor for a group consisting of the first, second, fifth and sixth key elements, in the form of a sequence of pulses of duration 90 el . hail, shifted relative to each other also by 90 el. hail, and for the group consisting of the eighth, third, fourth and seventh, in the form of a similar sequence of pulses, shifted by 45 e. hail, relative to the first pulse train. 4. An electric motor according to claim 1, characterized in that the power supply circuit is made with a midpoint, the midpoint of the power supply circuit is connected to a common point of the sections, a. the inverter control device is configured to form opening signals in the rotor angle for the first key element 0-135, second 90-225, third 135270, fourth 225-360, fifth 180315, sixth 270-45, seventh 315-90, eighth 45-180 e. hail. 5. The motor according to claim 1, characterized in that the power supply circuit is made with a midpoint, the midpoint of the power supply circuit is connected to a common point of the sections, and the inverter control unit is configured to generate opening signals for the group consisting of the first, second , the fifth and sixth key elements in the form of a sequence of pulses with a duration of 90 e. hail, shifted relative to each other also by 90 el. hail, and the second, third and fourth sensitive elements of the sensor are offset from the first by 90, 135 and 225 e. hail, signal. sensor elements are made with an angular size of 180 e. hail, first, second, fourth, fifth, sixth and eighth channels of the functional converter are made in the form of a logical element BANGE, the third channel is in the form of an element AND, and the seventh is in the form of an element OR NOT, and the direct inputs of each of these elements connected to the output of one sensitive element, respectively, of the specified sequence of channel conversion with the first, second, fourth, third, fourth and first sensitive elements of the sensor; the inverse inputs of the BAN elements are connected respectively Kazan: a sequence of enumeration of channels with the third, fourth, first, second and fourth .; sensor elements, the first input of each of the AND elements, the IPI-FIE is connected to the second sensitive element, and the second input of the AND, OR-NOT element to the third sensitive element of the sensor. 7. An electric motor according to Clause 3 and 5, characterized in that the second, third and fourth feelings. FIG. Fig.Zelnye elements of the sensor are offset from the first, respectively, 90, 135 and 225 e. hail, the sensor signal elements are made with an angular size of 180 el. hail, first, third, fifth and seventh channels of the functional converter are made in the form of a logical element BANNER, the second and fourth channels as an AND element, and the sixth and eighth channels as an OR-NOT element, and the direct inputs of each of the specified BAN elements connected, respectively, to the specified sequence of enumeration of channels with the first, third, second, and fourth sensitive elements of the sensor; element, respectively, with the second, fourth, first and third sensitive elements, the first input of the second and sixth channels is connected to the output of the first sensitive element, the second input of each of these channels is connected to the output of the second sensitive element, the first input of the fourth and eighth channels is connected to the output the third sensitive element, the second input of these channels is connected to the fourth sensitive element of the sensor. bj b. j | b bv | l | b at one in with and Fi.TSB, By b b. one b1 bz -about- B eleven FIG. five