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>
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>
Symbol of Single Pole Double Throw Switch in Circuit
The symbol of the single-pole double-throw switch in the circuit is a circle with a slot. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Discussion and conclusion of single-tube AC amplifier circuit
The related conclusions and discussion of the single-tube AC amplifier circuit are as follows: * * 1. In terms of static work points ** 1. * * Important ** - The setting and adjustment of the static working point was crucial. A reasonable setting can make the amplifier work stably and reliable. To obtain the maximum undistorted voltage, the static operating point should be located at the middle of the AC load line. In order to stabilize the operating point, certain conditions must be met, such as <BQ>> II <I21>. 2. * * Calculation Method ** - The static operating point can be calculated by a specific formula, such as <R = U21UU> II>, or <<CBBBQE + RR1EBEQBQEQCQR-CQCCQR>-UE= I <EcCQCreERCCEQ + RR-I = E-U-U = EUbeI = ICQBQ>. The calculation involved the parameters of various components in the circuit, such as the base power supply, bias resistance, collector power supply, collector resistance, etc. These components interacted to determine the state of the static operating point. - The static working point can be measured with the Model MT-47 Multimeter. * * 2. Dynamic parameters ** 1. * * Calculation of voltage amplification and input and output resistance ** - The voltage amplification factor is related to the input and output resistance calculation, and the calculation result is usually affected by certain conditions (such as <26> 1>(IEQHR = 0>). - The input resistance, r_{i}, has the following values: r_{i}= R_times beLiouru = A '-_, and because of the two values, we have the following values: LcL//R = RR'_, beBBBi21BBbeR <<Rr_, so we have the following values: beirR =_, and mVMV +_beta += rr' bbbe_, where Omega = r'bb300c_. The input resistance can also be calculated by using [sisiR-uuu]. - The output resistance, r_{o}, can be calculated by the formula, where, u is the output voltage at no-load, and u0 is the output voltage at load. The calculation of the output resistance is related to factors such as the load resistance in the circuit. When all the excitations are assumed to be zero, the controlled source is cut off, and the output resistance can be calculated accordingly. 3. * * Impact on circuit performance ** - The variation of circuit parameters will affect the static operating point, voltage amplification and output wave. For example, when an AC signal was input, the circuit only had a static operating point when the direct current passed through it. The AC signal would interact with the static direct current, affecting the voltage and current at each point in the circuit, which in turn affected the amplification factor and output wave. For example, in a circuit consisting of a mos tube and a semiconductor, the positive and negative half cycles of the AC signal would change the working state of the mos tube and the semiconductor, thus affecting the amplification performance and output characteristics of the entire circuit. - In the experiment, you can change the component parameters in the circuit (such as R_{C}, R_{L}, etc.) to observe and measure the impact on the static operating point, voltage amplification, and output wave. This helps to understand the working principle and characteristics of the single-tube AC amplifier circuit. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The car circuit is a parallel single-wire system. Why?
The main reasons for using the parallel single-wire system in the car circuit were as follows: 1. ** Simple circuit structure **: The single-wire system is adopted, that is, only one wire is used to connect the power supply to the electrical equipment, and the metal parts (car body) are used as another public circuit line. This can greatly simplify the circuit layout, reduce the number of wires used, and make the circuit structure of the car more concise. 2. ** Easy to install **: After the circuit structure is simplified, it is more convenient and faster to install the circuit in the car manufacturing process, which can improve production efficiency and reduce installation difficulty and workload. 3. ** Easy for fault inspection and diagnosis **: When the car circuit fails, the simple circuit layout and single-wire system will help the maintenance personnel to find the fault point more quickly and accurately, reducing the difficulty of inspection. 4. ** Meet the working requirements of the electrical equipment **: The standard voltage of the electrical equipment on the car, such as the battery, the generator, and other electrical equipment, is the same. The parallel connection method is adopted, that is, the positive pole is connected to the positive pole, and the negative pole is connected to the negative pole between the two power sources and all the electrical equipment on the car, forming a direct current parallel circuit. This connection method could ensure that each electrical equipment was controlled by a special switch connected in series in the branch circuit. It could not only meet the working requirements of the battery, but also play the advantages of the two power sources (battery and generator). It could also easily start or stop any electrical equipment, thus ensuring that each electrical equipment worked normally and orderly without mutual interference. It could also limit the scope of circuit faults and facilitate the dismantling and maintenance of electrical equipment. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Single-phase electric meter current 10A
If the single-phase meter current is 10 amps, this 10 amps may be the nominal current. The rated current was used to calculate the base current value of the load. The smaller the rated current, the smaller the starting current of the electric meter, and the more sensitive the electric meter was. For example, if the starting current of the meter is 0.5% of the nominal current, then the meter will start counting as long as the current in the meter circuit is higher than 0.05A, and the meter will not count if it is lower than this value. Single-phase electric meters often have different specifications such as 10, 20, 40, 60, 80, 100A, etc. When using an electric meter with 10A current, you need to consider its matching with the power consumption. The current parameters are neither the bigger the better nor the smaller the better. It should correspond to the power consumption. The maximum current of all electrical appliances should be calculated. If the current parameters of the electric energy meter are small, the electric energy meter may burn. Therefore, it is usually recommended to choose an electric energy meter with a slightly larger current parameters. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How big is the single-phase meter for 60A?
If the current is 60A, you can choose A 5 (60A) single-phase meter, where 5A is the basic current and 60A is the maximum current. This single-phase meter could meet the measurement requirements of 60A current, but in actual use, factors such as wire loss had to be taken into account. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
stm32 single-chip computer USB download program circuit
There were two ways to download the STM32 program. One was based on JTAG (SWD). This method required an simulator (such as J-Link and U-Link) to efficiently and quickly debugged the STM32 single-chip system. The other was based on serial port. The entire STM32 series supported this method. This method could download the HEX file to the STM32 chip through a USB cable and the corresponding ISP download software. In order to download the circuit through the serial port, one must first understand the several boot modes of the STM32. If you want to download the code through the serial port, you need to set BOOT0 to 1 and BOOT1 to 0. If you want the STM32 to run the code as soon as it is reset, you need to set BOOT0 to 0 and BOOT1 to any value. A circuit could be designed to control the one-button download circuit through the serial port to USB chip CH340G's DTL #and RTS#pin signals, thereby indirectly controlling the STM32's RESET and BOOT0 pin signals, achieving the effect of one-button download and operation through the serial port. The serial port download software can choose MCUSP, which can automatically allocate the BOOT0 and RESET signals through the DTL and RTS signals of the serial port. The user does not need to manually switch the state. Open MCUIsp, click Search serial port, and it will automatically find the onboard serial port of the circuit board. Choose the baudrate of 460800 in the bit rate, select the low level reset of DTL in the lower left corner, and then load the burn file into BootLoader at RTS high level. Before the program was written, click to read the device information. If the relevant information appeared, it meant that the serial port connection of the circuit board was successful. Then click to start programming, and the program began to be written. After the program was successfully written, a message indicating that the program was successfully written would appear. The specific process was as follows: mcuisp controls the DTL output to be low, so DTL #output is high. Then RTS is set to high, so RTS#output is low, so Q3 is turned on and BOOT0 is pulled high. At the same time, Q2 will also be turned on, and the reset pin of STM32 will be pulled low to achieve a reset. Then, after a delay of 100ms, mcuisp controls DTL to be at high level, DTL #will output low level, RTS will remain at high level, RTS#will continue to be at low level. At this time, the reset pin of STM32 will become high level because Q2 is no longer connected. STM32 will end the reset, but BOOT0 will still remain at 1, thus entering the SP mode. Then mcuisp can start to connect to STM32 and download the code, thus realizing one-click download. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The theoretical value of the output resistance of the single-tube amplifier circuit
1. **共射放大电路** - 对于单管共射极放大电路，输出电阻\(R_{o}=R_{c}\)。 2. **共集放大电路（射极跟随器）** - 其输出电阻\(R_{o}=R_{e}//\frac{(R_{b} + r_{be})}{(1+\beta)}\)。 3. **共基放大电路** - 输出电阻\(R_{o}=R_{e}//\frac{(R_{b} + r_{be})}{(1+\beta)}\)。 <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>