SU470042A1 - Stabilized contactless motor - Google Patents

Description

one

This invention relates to controllable electric drives.

There are known stabilized contactless DC motors containing a synchronous machine, the three-sectional root winding of which is connected to the output of a full-wave switch, the control circuits of which are connected through a logic device with a rotor position sensor, and a master generator connected to a trigger with two steady states .

A disadvantage of the known device lies in the narrow range of stable operation of the electric motor.

The purpose of the invention is to eliminate this drawback.

The goal is achieved by the fact that the automatic device is designed as a trigger with three stable states with six cells "And and six cells" OR at the output, and to the second inputs of the cells "And with two stable states .

FIG. 1 shows a circuit diagram of the proposed electric motor; in fig. 2 - stress diagrams in circuit nodes.

The stabilized contactless motor contains a synchronous machine 1,

the three-section root winding 2 of which is connected to the output of the two-half-period switch 3 on transistors 4-9, the control circuits of which are connected to the rotor position sensor 10 via a trigger with three stable positions 11, the outputs 12, 13 and 14 of which are connected to six cells " And 15-20 and six cells “OR 21-26. The motor is equipped with a master generator

27 connected to trigger 28 with two stable states, two outputs of which 29 and 30 are connected to the second inputs of the cells “I.

The stress plot positions in FIG. 2 correspond to the positions of the drawing in FIG. 1. Indicated

engine sections

2A, 2P, l ZC The electric motor works as follows.

In the absence of a phase shift of the signals of the rotor position sensor 10 and the master oscillator 27, the electric motor operates on a natural mechanical characteristic (the voltage plots in Fig. 1 are represented by solid lines). When the supply voltage changes, the load moments and the frequency of the master oscillator 27 change the phase shift of the signals of the rotor position sensor 10

relative to the signals of the master oscillator 27 (in Fig. 2, this change is shown by dotted lines). This causes not only a change in the duration of the pulses taken from the AND cells, but also the appearance of additional pulses from these cells (C / is-t / 2o plots). pulse-width modulation of both the main signal and the additional signal (epure) occurs - the main signal opens transistors, for example, 4 and 8, which connect the motor windings to a power supply source, creating a positive electromagnetic moment, and an additional signal opens the transis Orae (e.g., 5 and 7) to ensure the creation of a negative electromagnetic torque.

Iredmet invention

Stabilized contactless d.c. motor comprising a synchronous machine, Triplex Korn winding which is connected to the output of the full wave switch controlling guides Exalt which are linked via a logic device with a sensor of the rotor position, and zadayuschny generator nodklyuchenny to trigger a bistable state E, wherein By the fact that, in order to extend the range of work stability, the mentioned logging device is designed as a trigger

with three steady states with six cells "AND and six cells" OR at the output, and the second inputs of the cells "AND are connected to the trigger outputs with two stable states.

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