SU1539742A1 - Discrete ac voltage regulator - Google Patents

Abstract

The invention relates to electrical engineering and can be used to power various radio equipment. The purpose of the invention is to reduce the distortion of the output voltage form and reduce the level of radio interference. When the stabilizer operates in the same zone, when the codes at the input and output of register 5 are equal, the key of unit 2 is permanently connected to the corresponding tap of the autotransformer 3, regardless of the current zero crossing. The output voltage is not distorted and radio interference is absent. The distortion of the output voltage form and the appearance of radio interference occurs only at the moment of the transition of the stabilizer from one zone to another, which is relatively rare and non-periodic. Thus, the goal is achieved due to the continuous supply of control pulses to the key elements of block 2 from the driver 6 pulses in any zone of operation of the stabilizer. 1 il.

Description

The invention relates to electrical engineering and can be used to power various radio equipment.

The purpose of the invention is to reduce the distortion of the output voltage form and reduce the level of radio interference.

The drawing shows a block diagram of a voltage regulator of discrete action.

The stabilizer consists of series-connected between the input and output terminals of current sensor 1, a block of 2 key elements and an autotransformer 3 with taps. At the output of current sensor 1, a zero-body 4 is included, which fixes a decrease in current from zero, the output of which is connected to the resolution input of register 5. The output of the latter is connected to the information input of the pulse former 6, the output of which is connected to the control input of the block of 2 key elements. A voltage measuring unit, made in the form of an analog-digital converter, is connected to the input pins of the stabilizer, which converts the input voltage into a digital code, which is fed to the information input of register 5. A two-input element EXCLUDING OR 8, the output of which is connected to the control input of the pulse shaper 6.

The stabilizer works as follows.

When the stabilizer is turned on, all the keys of block 2 are closed and at the output of the autotransformer 3 the voltage is zero.

The current flowing through the sensor I current is equal to zero and the zero-body 4 generates a signal that allows writing to the register 5.

DAL 7 converts the input voltage of the stabilizer into a digital code that is written to register 5 of the record. The code at the information input of register 5 and its output compares element 8, which implements the function EXCLUSIVE OR, gives permission to turn on the driver 6 pulses, which, in accordance with the code received from register 5, switches on the corresponding key of unit 2. A current flows through the current sensor, thanks what is the recording of information in the register 5 is blocked. The stabilizer starts working

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In static mode, when a certain input voltage zone corresponds to the on state of a specific key of block 2 to the corresponding tap of the autotransformer 3. As a result, the required output voltage appears at the output of the stabilizer.

Thus, when the stabilizer is operating in the same zone, when the codes at the input and output of register 5 are equal, the key of unit 2 is constantly turned on regardless of the current zero crossing and the output voltage is not distorted.

Switching the keys of block 2 when the stabilizer transitions from one chona to another occurs as follows. As soon as the code at the output of the DAC 7 changes, which corresponds to the transition of the input voltage to another zone, the information on the input and output of register 5 becomes unequal, therefore the element EXCLUSIVE OR 8 blocks the pulse shaper 6, which stops the supply of control pulses to the key elements of block 2.

At the moment when the current through the key elements of block 2 drops below a certain level, almost to zero, the zero-body 4 permits writing a new code to register 5, the code at its input and output becomes the same and even. ment 8 permits the switching on of the pulse former 6, which, in accordance with the register code 5, includes the required key of the block 2. The stabilizer starts operating in another zone.

The distortion of the output voltage form and the appearance of radio interference occurs only at the moment of the transition of the stabilizer from one zone to another, which is relatively rare and non-periodic.

Thus, when operating in any zone, control over key elements of unit 2 is continuously applied, which virtually eliminates distortion of the output voltage form and reduces the level of radio interference.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION Claims of a voltage regulator of discrete action, comprising a current sensor, a block of key elements and an autotransformer connected in series between an input and an output terminals, an analog-to-digital converter whose input is connected to 51 input pins, and the output to the information input of the register, a zero-body whose input is connected to the output of the current sensor, a pulse shaper, the output of which is connected to the control input of the block of key elements, characterized in that, in order to reduce the distortion of the output stress and decrease 97426 radio interference, an EXCLUSIVE OR element is entered in it, one input of which is connected to the register output, the second input - to the output of the analog-digital converter, and the output - to the control input of the pulse former, the information input of which is connected to the output of the resolution, IQ of the zero-connected output.