SU401923A1 - FREQUENCY-DEPENDABLE CONVERTER - Google Patents

Description

one

The invention relates to the field of measurement of physical quantities, for example, to control the angular velocity.

Basically auth. St. No. 185594 describes a frequency-dependent converter containing a frequency sensor, a power source, an inverter with controllable keys, rectifiers and a load.

However, when controlling the operation of several converters from a single sensor, it is necessary to increase the power and size of the sensor.

In order to increase the number of converters operating from a single sensor, the proposed converter contains an additional multiwinding transformer, two primary windings of which are connected in series with resistors in the collector circuits of the inverter transistors, and the secondary windings are connected to the converter inputs.

The drawing shows a diagram of the Converter.

The signal from sensor 1 is supplied to control the inverter 2, which converts the DC (rectified) voltage of the power supply 3 to the alternating voltage pulses induced in the winding 4 of the saturable transformer 5. Each primary

the clock circuit of the inverter 2 includes the primary windings 6 of the transformer 5, the transistors 7, the resistors 8 and the primary windings 9 and 10 of the additional transformer 11.

The windings 9 and 10 of the transformer 11 are connected in such a way that when current flows through the primary circuits of the inverter 2, the core of the transformer 11 re-magnetizes with the frequency of magnetization reversal of the core of the transformer 5, i.e. the frequency of the sensor 1. The voltage of the secondary winding 4 of the transformer 5 of the inverter 2 through the ballast resistor 12 and the rectifier 13 are applied to the load 14. The average value of this voltage

proportional to frequency. The ballast resistor 8 together with the transformer 11 provides a predetermined mode of operation of the inverter 2 connected to the power source 3. In some cases, the resistors 8 may be absent.

To provide the key mode of the transistors 7, windings of non-critical positive feedback 15 are provided. Instead of transistor inverters,

Any known circuits are used with other controllable elements, for example, thyristors, etc. The windings 16 of the transformer 11 perform the role of master oscillators for other converters.

Turning on the transformer 11 allows some of the energy, which was wasted in the ballast resistors 8 of the primary inverter circuit, to be used to control the inverters of other converters. In this case, the power taken by transformer II can exceed the power taken by the inverter from sensor 1 by several orders of magnitude.

In this connection, a signal appears on the secondary windings 16 of the transformer 11, the power of which is sufficient to control the inverters of other converters. Number

Winding 16 is selected based on these converters.

Subject invention

Frequency-dependent converter auth. Sat No. 185594, characterized in that, in order to reduce power consumption, it contains an additional multiwinding transformer, the two primary windings of which are connected in series with resistors to the collector circuits of the inverter transistors, and the secondary windings are connected to the converter outputs.