SU840845A2 - Two-position regulator - Google Patents

Description

I

This invention relates to a control and measurement technique.

According to the main author. St. No. 479095 from the message is a two-position controller containing a pulse generator, an emitter follower connected to an actuator, temperature sensors and medium speeds, included in the main circuit of the first and collector circuit of the second cascade of the pulse generator 0, respectively.

The disadvantage of the regulator is. the absence of a programmable triggering device and the presence of a pulse transformer in the control circuit of the operation of the auxiliary, secondary relay, which reduces the speed of the limiting possibility of miniaturization of the controller.

The purpose of the invention is to improve the accuracy of the controller, reduce the power of the consumption center, increase the speed and reduce the size of the controller.

The goal is achieved by the fact that in the two-way controller,

holding a pulse generator, an emitter follower connected to the actuator, a temperature sensor, a medium speed sensor that is included in the collector circuit of the second cascade of a pulse generator, the temperature sensor and temperature sensors are made in the base circuit of the first cascade thermistors, the output of the second stage of the pulse generator and the emitter follower input are connected via a nonlinear integrating element.

In addition, the non-linear integrating element is designed as a series-connected transistor and a capacitor, with the base and collector of the transistor being the input and output of the element, respectively.

Fig. 1 shows a block diagram of a two-position controller; Fig. 2 is a circuit diagram of a two-position controller. The regulator consists of a frequency-frequency converter 1 for the velocity of the medium and temperature, a nonlinear integrating element 2, a relay actuator 3 The frequency-pulse converter 1 for the velocity of the medium and the temperature converts the velocity of the air and the temperature during the pulse frequency, amplitude and the frequency of which is functionally related to the parameters of the sensors speed and temperature. The output frequency of a certain amplitude is fed to the input of the nonlinear integrating element 2., averaging the pulse voltage and providing the base bias on the relay actuator 3. Element The relay actuator, made on a composite emitter with a torus, controls the electromagnetic relay. The basic electrical diagrams of the on-off regulator (Fig, 2) contain a pulse generator on the transistors 4 and 5, the emitter follower on Tpai HCTOpe 6, the actuating element 7, the sensors 8 and 9, the temperature of the velocity of the medium, divide 10 - 13 voltage, nonlinear integrating element on the transistor 14 and the capacitor 15, and also contains the time setting and decoupling capacitors 16 and 7, the stabilizer 18. The device operates in the following way. When the power is turned on and the effect of the predetermined values of the velocity of the medium on the temperature sensor 9, the transistors 14 and 6 are in the junction of the cutoff, and the transistors 4 and 5 are in the active state. The pulse generator transistors 4 and 5 operates in a decelerated mode. The minimum displacement due to the collector current of the transistor 5 is insufficient for charging the capacitor 15 to the opening value of the transistor. Actuator 7 is off. When the velocity of the medium, for example, air, decreases, the temperature increases and the resistance of thermistor 9 decreases. Capacitor 16 is recharged to the offset value at the base of input transistor 4, which causes it to cut off, and transistor 5 to saturation state. From this moment begins the discharge of the capacitor 16 through the collector-base circuit of the saturated transistor 5, the temperature sensor 8 and the parallel speed sensor circuit 9, the setpoint resistance 11. When a positive bias is reached at the base of the transistor, 4, i.e. U8 U6 to U9 - U11 0, transistor 4 goes into saturation state, and transistor 5 goes to cut-off state. The circuit is overturned, and the pulse is intensified at the output, the frequency of which is determined by the formula o-gyav- g: / iTV D o the initial frequency of relaxation of the pulse generator; Ey - the sensitivity of the velocity conversion of the medium, Hz / m / s; -. t is the sensitivity of the temperature propellant, Hz degree AVj. D - deviation of the velocity of the medium and temperature, respectively. The pulse voltage through the separation circuit 17 opens the transistor 14 of the nonlinear integrating element with a positive pulse difference and recharges the capacitor 15. At the moment when the voltage on the capacitor 15 reaches (1 opening magnitude of the transistor 6, the emitter follower actuates the actuator 7, closing (opening) contacts in the circuit regulating the speed of the air supply, for example, in the motor power supply circuit. As the velocity of the medium, for example air, increases, the resistance of thermistor 9 increases, and the pulse generator goes into a decelerated state, the circuit returns to its original state, opens the contacts of the actuating element 7. Testing the layout of the two-position controller shows that the power consumption is reduced by more than half a time, and the accuracy of the controller is increased by more than an order of magnitude. In the known two-position controller, the power consumption and control reaches 1-2 W, in the proposed controller the power consumption and control

, does not exceed 0.25 W, and the accuracy of the attack reaches 0.1% of the nominal setpoint of operation. t.

The invention can be used to control the speed of the dowjet of a medium, such as air, in air conditioning systems and life support in the system control of autonomous means of cooling the means of computing and electronic equipment.

Claims (2)

1. A two-position controller, on Tues.St., No. 479095, characterized in that, in order to increase the accuracy and reduce the size of the controller, it has the output of the second cascade of the pulse generator and the emitter input of the closest 11th integrating element. 2. The regulator according to p. I, that is, that the nonlinear integrating element1 {t is made in the form of a series-connected transistor and a capacitor, wherein the base and collector of the transistor are an input and an output of the element, respectively. Sources of information taken into account in the examination 1. USSR author's certificate No. 479095, cl. G 05 O 27/02, 1972 (prototype).