What can be done so that the two motors are running in sync at any one time

The inverter is a drag on the motor, and the two motors need to run synchronously, and the input control terminal function of the inverter can be used to realize the frequency setting of the two inverters. That is, the speed increase command end and the deceleration command end are used, and the on-off signal of the button is used to increase or decrease the set frequency. After turning on the forward rotation command of the inverter, when the speed increase button is closed, the speed increase command terminal gets a signal, and the output frequency of the frequency converter increases according to the acceleration time, and the output frequency of the frequency converter is maintained when the speed increase button is disconnected; When the deceleration button is closed, the deceleration command terminal gets a signal, the output frequency of the inverter decreases according to the deceleration time, and the output frequency of the inverter is maintained when the deceleration button is disconnected.

Using the above method and cooperating with the relay can carry out unified adjustment and fine-tuning, and the purpose of synchronous control of multiple motors can be achieved.

Unless you use a servo motor or a stepper motor, it will not meet the requirements you say. The speed of an ordinary motor changes with the change of load, and the load of the two motors cannot be the same. Even if the external load energy is the same, the motor performance cannot be the same.

uu top top

Install a software, what specific software, you can go to the professional ** to find.

Speed synchronization can be done in the following ways:

1. Delta is achieved by mutual feedback between servo controllers, and two sets of controllers accept the same set of pulses.

The group pulse controls these two sets of servos separately, using the linear interpolation command, as long as the linear interpolation is a straight line of 45 degrees, that is, the two sets of servos are regarded as the x-axis, and the y-axis is viewed, respectively, from the coordinates (0,0) to (100,100) such interpolation commands can complete the synchronous output at the same speed.

3. There is also a control mode is synchronous axis control, two or more motors are driven synchronously, one master and one slave work, and the driven shaft follows the driving shaft.

1. The synchronous speed of the asynchronous motor refers to the speed of the rotating magnetic field generated by the alternating current added to the input end of the motor, which is called the synchronous speed, and the calculation formula is n 60f p, f: the frequency of the alternating current, p: the number of pole pairs of the motor, taking the domestic power grid 50hz as an example, the synchronous speed of the 4-pole motor (2 pairs) is 60 50 2

1500rpm。

2. The rotor speed of the asynchronous motor is equal to the synchronous speed under the theoretical no-load, but it is impossible to do it in practice. The difference between the two is the slip velocity, which is divided by the synchronization velocity to get the slip rate. The larger the load, the smaller the rotor speed and the greater the slip rate.

In practice: The speed on the motor nameplate is the rotor speed.

The synchronous speed of the three-phase asynchronous motor is related to the number of poles of the motor

2. The synchronous speed of the motor is 3000 rpm.

4. The synchronous speed of the motor is 1500 rpm.

6. The synchronous speed of the motor is 1000 rpm.

8. The synchronous speed of the motor is 750 rpm.

The rated speed is related to the motor slip rate, and the slip rate varies from one manufacturer to another, generally around 4. For example, the rated speed of a 4-pole motor is generally around 1440 rpm.

Pro: I'm glad to answer for you, there are three ways to achieve complete synchronization of two motors:1

Encoder feedback control: The encoder is used to measure the angle and speed of the motor, and then the speed and direction of the motor are controlled according to the feedback signal. This method allows for a high degree of synchronization and can improve the accuracy of the control by adjusting the control parameters.

2.Use synchro gears: Another way is to synchronize the motor by installing synchronizing gears.

The synchronous gears are connected to each other to ensure that the speed and direction of rotation of the two motors are exactly the same. The use of synchronous gears needs to be considered in the design and manufacturing phases, so they are not suitable for the improvement of existing systems. 3.

Closed-loop control: Closed-loop control based on encoder feedback can ensure accuracy and stability, and smoothness is often used to control complex motion systems. By using the PID control algorithm, the rotation speed and direction of the motor can be automatically adjusted when the motor speed and position are not synchronized to achieve the effect of synchronization.

This method requires adjustment of the PID parameter stopper pin to achieve optimal control and system performance. Achieving full synchronization of the motor requires the right technology and control methods. The choice of the most suitable method depends on the specific application scenario, such as the need to ensure high accuracy, high interference immunity, or reasonable cost.

Synchronous speed** min) = 60 * frequency number of pole pairs, 4 pole motors, 2 pairs of magnetic poles.

So the synchronous speed of the 4-pole motor = 1500 rpm.

Synchronous speed: 60 times 50 divided by 2 equals 1500

The speed of the asynchronous motor must be less than its synchronous speed, the reason is that the conductor of the asynchronous motor cuts the magnetic field lines, and the stator and rotor can rotate in relative motion. Once the speed is synchronized, there is no relative movement between the magnetic field line and the conductor, there is no cutting, and the motor cannot rotate.

"Asynchronous" means that the motor winding is embedded with 3 sets of coils with an electric angle of 120 degrees from each other, and the load is a three-phase power supply; The rotor speed of the motor is slightly lower than the rotating magnetic field speed generated by the stator winding, and the two speeds are not synchronized and called asynchronous. Another point of asynchronous is the motor that can reverse and rotate forward, that is, the direction of rotation can be changed by replacing any two live wires during normal operation.

1) When starting, the rotor is stationary, the stator rotating magnetic field is synchronous speed, the rotor cuts the stator magnetic field and generates an induced potential, and generates an induced current in the short-circuit winding, and the rotor current is rotated by electromagnetic torque in the stator magnetic field.

2) During the rotation process, if the rotor reaches the synchronous speed, it is relatively stationary with the rotating magnetic field of the stator, and the rotor will not cut the stator magnetic field and generate induced potential and induced current, and the rotor will not be affected by the electromagnetic torque of the stator magnetic field, and the rotor will slow down.

The above is the reason why the actual speed of the asynchronous motor is slightly lower than the synchronous speed through the counter-proof method.

The rotation of the rotor of an asynchronous motor is due to the rotor conductor cutting the stator magnetic field, creating an EMF that generates an electric current within its conductor. This current acts on the stator magnetic field to generate rotor torque, causing it to rotate. If the rotor and stator rotate at the same speed as the magnetic field (synchronous speed), there is no cutting, no torque, and the speed decreases.

There is slip again, there is torque.

The rotor of the asynchronous motor depends on the magnetic field lines that cut the stator magnetic field to generate the excitation current of the rotor, if the rotor rotates at a synchronous speed, the magnetic field of the rotor and the stator has no relative motion, the magnetic field lines cannot be cut, the rotor can not be excited, and the rotating torque will be lost. Therefore, it is necessary to maintain a slip rate, which is around 5%.

There is a constant relationship between the rotational speed of the rotor and the frequency of the gridn=ns=60f p, and ns is called the synchronous speed. If the frequency of the grid is constant, the speed of the synchronous motor is constant at steady state, regardless of the size of the load.

Speed of synchronous motor = 60 * frequency Number of pole pairs.

Synchronous motor speed: 60F p

f is the frequency and p is the number of pole pairs.

For example, f=50Hz, the number of pole pairs p of a 4-pole motor is 2, then the speed = 60 * 50 2 = 1500 rpm min