SU826549A1

SU826549A1 - Device for pulse-width control of stabilized voltage converter

Info

Publication number: SU826549A1
Application number: SU792806527A
Authority: SU
Inventors: Александр Алексеевич Головко; Игорь Тимофеевич Шпанько
Original assignee: Предприятие П/Я Х-5737
Priority date: 1979-08-02
Filing date: 1979-08-02
Publication date: 1981-04-30

Description

1one

Изобретение относитс к преобразовательной технике и может быть использовано в системах управлени источниками питани электроустройств и электропривода.The invention relates to converter technology and can be used in power supply control systems for electrical appliances and electric drives.

Известно устройство дл управлени источником посто нного напр жени , обеспечивающее фильтраи ию переменной составл ющей входного напр жени , содержащее задающий генератор, последовательно соединенные резистор и ковденсатор дл вьщелени переменной составл ющей, усилитель посто нного тока, модул тор ширины импульсов 1 .A device for controlling a DC voltage source is known that provides a filtering of a variable component of the input voltage, comprising a master oscillator, a series-connected resistor and a capacitor for selecting the variable component, a DC amplifier, a pulse width modulator 1.

Недостатком указанного устройства вл етс отсутствие реакции на изменение среднего значени входного напр жени , в результате чего вькодное напр жение получаетс модулированным низкочастотной составл юшей входного напр жени при изменении входного напр жени в больщих пределах.The disadvantage of this device is the lack of response to a change in the average value of the input voltage, as a result of which the output voltage is obtained by modulating the low-frequency component of the input voltage when the input voltage changes within large limits.

Наиболее близким к предлагаемому вл етс устройство дл управлени широтно-импульсным преобразователем, содержащее источник питани , блок выделени основной гармоники, задающий генератор, блок фазового сдвига, дваClosest to the present invention is a device for controlling a pulse-width converter containing a power source, a fundamental harmonic separation unit, a master oscillator, a phase shift unit, two

формировател импульсов, уси}1итель, сумматор, широтно-импульсный преобразователь, причем выход усилител подключен ко входу сумматора , выход последнего - ко входу регул тора фазового сдвига, а вход усилители к выходу блока вьщелени основной гармоники из пульсирующего посто нного напр жени , вторые входы усилител и сумматора подключены к выходу дл подключени источника управл ющего напр жени 2.pulse driver, usi} 1, adder, pulse-width converter, the amplifier output being connected to the input of the adder, the latter output - to the input of the phase shift regulator, and the input amplifiers to the output of the main harmonic section from the pulsating constant voltage, the second inputs the amplifier and the adder are connected to an output for connecting a source of control voltage 2.

Известное устройство также не реагирует на изменение среднего значени входного напр жени , в результате чего при значительных колебани х входного напр жени выходное напр жение получаетс модулированным низкочастотной составл ющей входного напр жени .The known device also does not respond to a change in the average value of the input voltage, as a result of which, with significant fluctuations in the input voltage, the output voltage is obtained modulated by the low-frequency component of the input voltage.

Цель изобретени - повьпиение точности регулировани .The purpose of the invention is the control accuracy.

Claims

This goal is achieved by the fact that the known device O is provided with a voltage divider containing serially connected voltage multiplier and DC amplifier covered by feedback, the output of which is connected to the second input of the comparator. 38a, the input is connected to the output of the power source, the input of the feedback amplifier of the splitter being connected to the output of the reference amplifier. In the drawing, a device is shown, the func- tion scheme. The device contains a source of 1 power supply, a TOCH1ShK 2 reference voltage, a divider 3 and an alternator, a series of master oscillator 4, a generator 5 of a triangular pair, a KOMiapaTop 6, a drive 7 of the control pulses, a converter of 8 paired, and the output divider is fed by the converter 7, the converter 8, a converter, and the output of the divider is fed to the driver of the control pulse 7, the converter is 8 paired, and the output divider is fed by the driver of the 7 control pulses, the converter is 8 paired, and the output divider is fed by the converter 7, the output pulse of the control pulse, the converter 8, and the output divider is connected. connected to the second input of the comparator, and the output of the source of the reference voltage is connected to the input of the feedback amplifier of the voltage divider. The device works as follows. The input voltage source source 1 is fed to the first input of the multiplier 9, the output of which sends a signal to the inverting input of the amplifier 10, the same input is supplied reference voltage from the source 2 of the reference voltage. From the output of the amplifier, the feedback 11 supplies the second input of the multiplier and simultaneously the resulting signal, proportional to the ratio of the reference voltage to the input, goes to one of the inputs of the comparator 6, to the second input of which is supplied from the generator 5 given amplitude and frequency determined by the generator 4. From the output of the comparator, the pulses go to the shaper 7 of the converter 8. Thus, the output of the converter forms the total pulses, the duration of which is inversely proportional to therefore, the volt-second area of these pulses will be constant when the input voltage is changed within large limits and will retain its specified value. The device allows you to increase the ratio of the low-frequency component in the stabilization mode to the output voltage of the converter when the rectified input voltage is varied within large limits. The invention is a device for a pulse-pulsed control of a stabilized voltage converter containing a master oscillator, with outputs connected to a triangular voltage generator and the first input of a control pulse driver, a comparator, the first input connected to the output of a triangular voltage generator, output to the second input control pulse driver, power source, reference voltage source, characterized in that, in order to increase the control accuracy, it is equipped with a voltage amplifier containing a series-connected voltage multiplier and a dc amplifier covered by feedback, the output of the dc amplifier of the voltage divider is connected to the second input of the comparator, the input of the voltage divider voltage multiplier is connected to the output of the power source, and The input of the DC amplifier of the voltage divider is connected to the output of the reference source. tension Sources of information received in the audience during the examination 1. Author's certificate of the USSR No. 609115, G 05 F 1/04, 1976. 2, USSR Author's Certificate No. 585585, H 02 R 13/16, 1976.