Single-phase half-controlled rectify circuit-
In a single-phase half-controlled rectify circuit, the electrical angle at which the crystallizer is in the on-state during a power cycle is called the conducting angle. The electrical angle from the moment the thyratron starts to bear the positive voltage until the trigger pulse is applied is called the trigger delay angle (trigger angle or control angle). By changing the trigger time, the voltage and current waves of the rectified voltage can be changed accordingly, and the output voltage of the direct current is a pulsating direct current with the same pole but the instantaneous value changes. Read more exciting novels for free
The composition of the basic components of the single-phase half-wave controllable rectify circuit
The single-phase half-wave controllable rectify circuit was composed of a controllable silicon (SCR), a LED, an ac power supply, and a load (rt). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the principle of the single-phase half-wave controllable rectify circuit simulation experiment?
The single-phase half-wave controllable rectify circuit was mainly composed of a transformer, a crystal-controlled reactor, and a load resistance. When conducting simulation experiments, the principle was as follows: 1. * * Analysis of the switching state of the thyratron ** - In the positive half-wave of the power supply voltage (0-Pi interval), the thyratron bears the forward voltage, but before the pulse u_G triggers the thyratron at the control angle, the thyratron is turned off. At this time, there is no current flowing in the load r, the output voltage u_d is 0, and the voltage the thyratron bears is the power supply voltage u_{ZT}= u2. - When the thyratron is triggered at <<Omega>=<Alpha>>, the thyratron will start to conduct, forming a load current <i_d>>. There is an output voltage and current on the load. At this time, if the tube voltage drop is ignored, the voltage across the load is the secondary voltage of the transformer <u_2>>, and the wave form of the load current <i_L>> is similar to the wave form of <u_L>>. - At the moment of <<Omega>>, the power supply voltage naturally crosses zero, and the cascaded current is turned off when it is less than the sustaining current. The load current is zero. - In the negative half-wave of the power supply voltage (in the range of <Pi>-2<Pi>), the thyristors are in the off-state due to the reverse voltage. There is no output voltage on the load, and the load current is zero. 2. * * Effect of control angle and conducting angle on output ** - The electrical angle from the moment the controllable silicon begins to withstand the forward voltage to the time when the trigger is turned on is called the control angle. The electrical angle of the controllable silicon in a cycle is called the conducting angle. In a single-phase half-wave rectify circuit, the smaller the control angle, the larger the conducting angle, and the larger the average value of the load voltage and current. By changing the size of the control angle, the output voltage can be changed to achieve the purpose of voltage regulation. 3. * * Piecewise-linear Circuit Analysis ** - Using the switching characteristic of the thyratron, the non-linear circuit was transformed into a piecewise-linear circuit. In different intervals (such as the turn-off and turn-on stages of the thyratron), the circuit presented different linear characteristics, so the existing circuit theory could be used to analyze each stage separately. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the maximum forward voltage of a single-phase controllable rectify circuit?
In the single-phase bridge half-controlled rectify circuit, the maximum positive and reverse voltage that the controllable silicon and the LED bear is "2U2"(U2 is the peak power supply voltage). The maximum forward voltage that a crystallizer can withstand is determined by the characteristics of the device itself, which is generally between several hundred volts and several thousand volts. In a single-phase full-wave controllable rectify circuit, as a current tube, the forward voltage that a crystallizer can withstand should be equal to the load voltage, which is generally between several tens of volts and several hundred volts. If the load voltage exceeds the endurance range of the cascaded cascaded Among them, the crystallizer can usually withstand a maximum forward voltage of 1000 volts, so the maximum forward voltage of the single-phase controllable rectify circuit needs to be determined according to the specific circuit conditions, generally between tens of volts and 1000 volts. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Single-phase AC electric meter circuit diagram
When the single-phase AC electric meter works, when the electric meter is connected to the circuit to be tested, the voltage of the circuit to be tested is added to the voltage coil. After the current of the circuit to be tested passes through the current coil, it will produce two alternating magnetic flux passing through the aluminum disk. These two magnetic flux are the same in time, and they will produce vortex currents on the aluminum disk. Due to the interaction between the magnetic flux and the vortex, a rotating moment was generated, causing the aluminum disk to rotate. The magnetic flux of the brake magnet also passes through the aluminum disk. When the aluminum disk is rotated, the magnetic flux is cut, and a current is induced on the aluminum disk. The interaction between the current and the magnetic flux of the brake magnet produces a brake moment opposite to the rotation direction of the aluminum disk, so that the rotation speed of the aluminum disk is uniform. Its main structure included a voltage coil, a current coil, a rotating disc (aluminum disc), a rotating shaft, a brake magnet, a gear, a meter, etc. These components worked together to achieve the power measurement function, but there was no detailed illustration of the single-phase AC electric meter circuit diagram. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The difference between one-way circuit and three-phase circuit
A one-way circuit had only one line and one neutral line. The current flowed from the line to the neutral line. For example, many electrical appliances in our home use a one-way circuit, such as lights and televisions. It is relatively simple, and the voltage is usually 220V. In a three-phase circuit, there were three live wires and sometimes a neutral wire. The voltage between the three wires was 380V. This kind of circuit was commonly used in the industry. For example, some large-scale electric machines used three-phase circuits. The three-phase circuit could provide more power than the one-way circuit, and it was more efficient. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which is better, a one-way circuit or a three-phase circuit
One-way circuits and three-phase circuits had their own characteristics and were suitable for different scenarios. It was not easy to determine which one was better. From the perspective of transmission cost and non-metallic consumption, under the same transmission power, distance, voltage, and line loss, three-phase transmission lines can save a lot of transmission costs and non-metallic metals. The amount of copper used is about 3/4 of that of single-phase transmission lines. In terms of generators, three-phase alternators were smaller, lighter, and cheaper than single-phase alternators of the same capacity. A three-phase transformer was not only more economical than a single-phase transformer, but it also had two types of output voltage. It could be connected to either a three-phase load or a single-phase load. For the motor, the three-phase motor was simpler in structure than the single-phase motor of the same capacity. It was reliable, cheap, had good performance, stable operation, and high efficiency. Three-phase power sources were easier to generate rotating magnetic fields and were suitable for powering three-phase electric machines, while single-phase circuits were relatively inferior in this regard. However, in daily life scenarios, such as household electricity, a single-phase circuit could meet the electricity needs of electric appliances such as lights, computers, electric kettles, fridges, and 1P air conditioning. Because the power of these appliances was relatively small, 220V single-phase alternating current could be used. In the industry, due to the large power of the equipment, the need for a stable rotating magnetic field, and for economic considerations, most of them used three-phase electricity. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the symbol of the phase shifter in the digital circuit?
In digital circuits, the phase shifter is usually represented by a small circle (or a wavy line). The standard symbol shape is a triangle pointing to the right with a circle at the end.(This circle is called the "Reverse Bubble"), which represents the function of reversing the input signal, and is used to represent the NOT function in its output. This representation is also used in the NAC and Nor symbols to represent the logical operation NOT function, and this bubble representing signal reversal (complementation) can appear on one or both of the output and/or input ends. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is the current in the transmission line single-phase or three-phase?
k21 three-phase induction motor forward and reverse circuit connection
This isn't related to the novel, but I can briefly tell you the key points of the positive and negative circuit connection of the three-phase induction motor. Three-phase induction motor to achieve positive and negative transfer line, mainly by changing the phase sequence of the motor three-phase power supply to achieve. Generally, two contactors would be used. The three-phase power supply of one of the contactors would be connected in the normal order, such as A-B- C. The three-phase power supply of the other contactors would be changed to C-B- A. In terms of the control circuit, it should be interlocked to prevent the two contactors from short-circuiting at the same time. However, this was just a simple introduction. The actual connection must be strictly in accordance with the electrical safety regulations. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Single-phase 6-wire single-capacity motor
Single-phase 6-wire single-capacity motor, in which 6 wires contain 3 coil, can connect one end of the 3 coil together, the remaining 3 wires, one is connected to the live wire, one is connected to the capacity, and one is connected to the neutral wire. Of the six leads, two were for the main coil, two were for the auxiliary coil, and two were for the centrifugal switch. The three parts, namely, the transformer, the centrifugal switch, and the starting coil, had to be connected in series to form a circuit, which was connected in parallel with the main coil to supply power. If the direction was wrong, the two ends of the main coil could be reversed. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>