SU601794A1 - Power diode electric drive - Google Patents

Description

one

The invention relates to electric drives with two-fold speed regulation by reverse through the engine drive circuit.

The electric drive is known, in which the reverse and braking of the engine with an irreversible root converter is carried out by measuring the 10–1 sign of anti-emf. the motor by changing the direction of flow of the air deNL 1. In this case, the root converter is locked for the time of commanding the braking until the sign of the current in the field winding changes. Thereafter, permission is again given for the operation of the cory transducer. This leads to an initial increase in speed, since the flow of excitations / g due to the presence of eddy currents and residual magnetism does not have time to change the expansion once the excitation current flows. In addition, the structure of the circuit with a reverse floor used in this device is rather complicated, since it provides for a special logic block that differs from that used in separate control in that it includes a reverse engine excitation reference device, as well as reverse pro / motor Intermediate amplifiers.

Closest to the invention is an electric drive comprising an irreversible converter with an irreversible input amplifier, a reversible converter with a logic unit and an irreversible input amplifier in the supply circuit of the excitation winding, the setpoint and the speed sensor connected to the comparison unit, and switching elements 2.

This electric drive excludes the emission in the mode of the beginning of braking, however it is more complicated than the one offered and is inferior in its functionality, for example, it does not provide automatic reverse from the analog setting signal, provides mg -: -: s11; 1n speed control range.

The aim of the invention is to simplify the drive and expand its functionality.

The goal is achieved by the fact that the output of the inverting converter is shunted by the first switching element, the control circuit of which is connected to the output of the amplifier of the nonreversive converter, the output of the amplifier of the nonreversive converter is shunted from the resistor.

the second switching element, the control circuit of which is connected via the threshold exposure element, is mixed with the current sensor, and the control target of the logic unit is connected to the output of the comparison unit and

Claims (2)

output sensor output gok. The drawing shows a structural drive. The motor-driven actuator contains an irreversible converter 1, a thyristor unit 2, a measles 5 DC motor, an impulse-phase control system 4, an irreversible amplifier 5, a switching unit 6 of the logic unit, a winding 7 in: excited and electric motor, setting 8 speed, reversible converter 9, reversible thyristor unit 10, switching element 11 of the logic unit, system 12 and a phase-wise stage: phenomena, non-reversible amplifier 13, threshold element 14, logic unit 15, setpoint 16 of the excitation current, communication unit; /, yes speed sensor (tachogenerator) 18, switching element (key) 19, time delay element 20, voltage sensor 21, resistor 22, switching element 23. The output of amplifier 13 is shunted by the first switching element 19, the output of amplifier 5 is shunted by a wire from resistor 22 and a switching element 23, the control circuit of which is connected via the time delay element 20 to the excitation current sensor, and the control circuit of the logic unit 15 is connected to the output of the comparison unit and to the output of the current sensor B03: buzz. The drive works as follows. In the initial position, the output of the amplifier 13 is triggered by the key 19, therefore there is no excitation current. The command to turn on the engine is the driver setting taken from the setpoint 8 speeds. This voltage is applied to the / 5 block and, depending on the polarity, includes defined contacts. The contacts (//, 6) turn on the required co / mplect of the valves of the reversing converter 9 and connect an irreversible amplifier 5 to the input device. When the voltage appears at the output of the amplifier 5, the switching element 19 opens, allowing the converter 9 to work, the exciting current rises, the motor accelerates to a predetermined speed. The signal to reverse the engine is the polarity of the driving signal. At the same time, the voltage at the output of the amplifier 5 and the current of the core drops to zero, the switching element 19 shunts the output of the amplifier 13, forcibly decreases to zero the excitation current. When the excitation current is zero, the logic unit 15 switches, the switching elements //, 6 of the logic unit turn on another set of valves in the converter 9, and the polarity of the input signal of the amplifier 5 changes. The output voltage of the amplifier 5 begins to increase again. However, its value is limited by the resistor 22 at a level that eliminates the appearance of the short-circuit current, but is sufficient to open the switch 19, allowing the amplifier 13 to work. When the output current of the bump after the polarity change rises to a predetermined level, the time delay element 20, which is holding the switch sufficient for dropping the current to zero, opens the key, and enables the core converter to operate. But there is a current in the engine bark, the drive brakes and accelerates in the opposite direction. The invention includes a valve electric drive containing a non-power converter with a non-reversible input amplifier, a reversing driver with a logic unit and a non-reversing input amplifier in the excitation winding power supply circuit, a setpoint sensor and a speed sensor connected to the comparison unit, and switching elements characterized by In order to simplify and extend the functionality, the output of the reversing converter amplifier is shunted by the first switching element, the control circuit of which is connected the output of the irreversible converter amplifier, the output of the irreversible converter amplifier is bridged by a circuit of a resistor and the second commutator element, the control circuit of which is connected via the threshold time delay element to the excitation current sensor, and the control circuit of the logic block of the ne ne to the output of the comparison unit and output of the excitation current sensor . Sources of information taken into account in the examination: 1.Catalogue company AEU 15602-69-7. AC and DC electric drives, power sources and control devices. Program 1968-69, p. nineteen. 2. The automated electric drive in the national household, vol. 2, M., “Energie, 71, p. 7-11.