The speed controller int is what and how to adjust

The system control part consists of three parts: S7200PLC, Pro-Face touch screen, and KGLF-2 microcomputer excitation controller. The PLC mainly completes the relay loop logic control working mode switching, PI adjustment during operation and external communication, etc., the Pro-Face touch screen mainly completes the system parameter setting and the information query of the fault, working time and setting operating parameters during operation, and the Pro-Face touch screen has the information of excitation current and excitation voltage recording curve.

The KGLF-2 excitation controller is composed of the main MC87C51 and the auxiliary AT89C51 single-chip microcomputer. The excitation controller mainly completes frequency measurement and excitation, pulse formation, fault detection and processing.

1. Measurement of the frequency of the induced voltage of the rotor.

When the synchronous motor starts, the frequency of the rotor induced voltage gradually decreases with the rise of the speed, once the synchronous motor starts, the single-chip microcomputer immediately detects the time of the rotor inducing half a cycle, starting from 20ms, the digital tube records "9", every 20ms increase in the middle, the digital subtracts 1, and the digital tube shows "0" when it reaches 200ms. In the process of synchronous motor asynchronous starting, when the rotor speed reaches 90 of the synchronous speed, the frequency of the rotor induced voltage is 5Hz, the cycle, and the half-cycle time is 100ms. After the full voltage, the speed of the motor will continue to rise, when the speed increases to 95 of the synchronous speed, the frequency of the rotor induced voltage is, the period is, the half-cycle time is 200ms, the computer detects this value, quickly enters the rectification program, outputs the pulse, the device is put into excitation, and at the same time turns on the excitation work instructions, turns off the low-voltage demagnetization and opens the demagnetization protection and out-of-step protection, etc.

Rotational speed set point, rotational speed fixed point.

Meaning; Here (by means of a regulating circuit) the speed of the motor (or other electric mechanism) can be set.

The meaning of the speed or speed given value is generally the speed or speed set in the control system.

ACT (stability), LIM (power limiting), droop (speed drop), droop adjustment sag characteristics.

The speed regulation of the oil supply system of the mechanical high-pressure oil pump is to rely on the centrifugal governor on the high-pressure pump to regulate the speed, the principle is that given a throttle position, the oil supply of the oil pump will maintain a corresponding amount, if the speed increases, the centrifugal force of the flying hammer of the speed regulating system increases, the oil volume will be reduced, and the speed will be kept constant.

In the case of electronically controlled high-pressure common rail, the electronic control unit (ECU) controls the amount of fuel injected by the injector's electronic control valve according to the signals from the throttle position sensor and the speed sensor.

You're talking about idling! Are you EFI or big pump?

Estimated rotational speed is determined by detecting or calculating with a counter.

The working principle of the circuit: the circuit uses the magnetic sensitive element as the sensor, when there is no external magnetic field, the output end of the magnetic sensor OUT output + level), when the motor rotates a circle, the potential will drive the small magnet N to pass over the magnetic sensor once, due to the action of the sensor under the action of the applied magnetic field, the output + level), int0 is set as the edge trigger in the program, this instantaneous change will be sent to AT89C51 through int0, resulting in an interrupt, so that the accumulator A automatically adds 1 and counts once. Every time the motor rotates, an interruption is generated, the accumulator adds 1, when the software counter T0 is timed for 1s, the counting value of the buffer is adjusted by BCD and sent to the LED display, and the value displayed by the LED is the current motor speed per second.

Calculation: Ideal speed = frequency * 60 number of pole pairs Motor speed counter actual speed = ideal speed * (1 - slip rate).

For example, the alternating current frequency is 50hz, the number of pole pairs is 2, and the slip rate is ideal, and the speed = 50 * 60 2 = 1500 rpm.

Actual speed = 1500 * (

1440 rpm.

Isn't there a nameplate, do you want a formula?

Use a pagoda-shaped pulley on the motor shaft and drill pipe shaft.

Take the metal cover at the upper end of the drill, and there is a pagoda-shaped pulley on the motor shaft and the drill pipe shaft. The V-belt is embedded in two different pulley grooves, which will have different speeds.

Before use, check whether the parts of the drilling machine are normal. The drill bit and the workpiece must be clamped and fastened, and the workpiece cannot be held by hand, so as to avoid injury accidents and equipment damage accidents caused by the rotation of the drill bit.

There is a pagoda-shaped pulley on the motor shaft and the drill pipe shaft, which is used for speed regulation.

Bench drilling machine is referred to as bench drill, which refers to a small drilling machine that can be placed on the operating table and the spindle is arranged vertically. The drilling diameter of the bench drilling machine is generally less than 13 mm, and generally not more than 25 mm. The spindle speed change is generally realized by changing the position of the V-belt on the tower pulley, and the spindle feed is manually operated.

1. Manually change the belt speed regulation (stepwise speed regulation): this mode is the most primitive, the tower wheelset of different diameters is installed on the motor output shaft and the drill bit spindle, and different transmission ratios can be obtained by changing the belt, so as to achieve the purpose of speed regulation. When changing the speed, the machine must be stopped first, the belt cover must be opened, the belt must be manually turned to the corresponding tower wheelset of the required speed, the belt guard must be installed, and then the machine will be started.

This speed regulation method is not suitable for semi-automatic drilling machines.

2. Use electromagnetic speed regulation motor speed regulation (stepless speed regulation): This speed regulation can be achieved by rotating the speed regulation button on the electromagnetic speed regulation controller.

3. Frequency conversion speed regulation (stepless speed regulation): use the frequency converter to adjust the feeding frequency to adjust the speed of the motor, and this speed regulation can generally be directly adjusted on the frequency converter operation panel to realize the speed regulation of the motor.

4. Use pole-changing speed regulation motor speed regulation (step-by-step speed regulation): step-by-step speed regulation is realized by changing the number of poles of the motor, such as changing the number of poles of the motor from 2 poles to 4 poles, then its synchronous speed can be changed from 3000r min to 1500r min, this speed regulation mode is generally controlled by the contactor, and there will be a speed conversion button on the control panel of the drilling machine, and you can press the button once.

It seems to be a unit of time revolutions. Hehe, I guess, because in mathematics int is to take the nearest integer down. Since the speed of the motor may not be an integer per unit of time, it is better to count it in this way.

It is the number of vibrations per unit of time.

The speed of the stepper motor can be changed by changing the pulse frequency output to the stepper motor driver. The control of the stepper motor can be easily realized by using the table-controlled TPC4-4TD, and the required functions can be set by the method of setting the display of Chinese characters. The settings are shown in the following figure:

Click ** to enlarge it.

In this way, the simplest action can be achieved by setting one line, and the setting principle is as follows: input 1 sets the x1 switch to start, the working mode selects pulse, the output terminal selects Y1 output pulse, the output frequency is set to 500 Hz, and the number of output pulses is 3000. When x1 is active, 3000 500 Hz pulse signals are output from the output Y1.

Yes, it can be set. The stepper motor does not have a speed setting, and the speed of the stepper motor is adjusted by adjusting the pulse frequency of the input driver and the subdivision parameters of the driver. The speed of the stepper motor can also be adjusted in the following ways:

Change the pole logarithmic variable.

Frequency conversion speed regulation. Commutator motor speed regulation.

Skewers regulate speed. Stator pressure and speed regulation.

Electromagnetic clutch speed regulation.

Rotor string resistance speed regulation.

By adjusting the pulse frequency of the input driver and the subdivision parameters of the driver to achieve the function of adjusting the speed of the stepper motor, in fact, it is to control the number of steps of the stepper motor per unit time.

Control the speed of the stepper motor, mainly by changing the frequency of the control pulse to control, but pay attention to the size of the subdivision value of the drive, for example, if it is a whole step, the motor needs 200 pulses per operation, if it is a half step, the motor needs 400 pulses to run, such as EZM552 digital drive, the maximum subdivision value can reach 512, and the motor needs 512 * 200 = 102400 pulses per operation. That is to say: when subdivided into 512, the motor speed is 1rps, and the frequency of the control pulse is 102400Hz; The motor speed is 2rps, and the control pulse frequency is 204800Hz

The so-called stepper motor is based on the control signal movement, a pulse signal to take a step, the stepping angle is calculated according to the inherent parameters, such as taking the 5-phase stepper motor as an example, the basic stepping angle is used that is, there is no subdivision, then every time a pulse signal is given, the stepper motor operates, and 500 pulses are a circle.

Therefore, when the frequency of the pulse is higher, the faster the running speed of the stepper motor, for example, if the pulse frequency is 500 Hz, then it can be calculated in turn.

If subdivision is involved, it can be calculated according to the step angle after subdivision.

1. Functions related to date and time in MySQL.

2. Create a table and insert data into the table.

3. The range of year is 1901 2155, if you insert 2166 into the table, an error will be reported.

4. Insert data into the time field in the table.

5. Insert the current time.

6. Insert date data, and only display the year, month and day are displayed in the screenshot.

Review the software settings, and if you can, what should be in the settings.