The control circuit of the two speed motor, how to connect the two speed motor controlled by the inv

If the servo motor is an AC motor, it is frequency conversion speed regulation; If the servo motor is a DC motor, it is DC voltage and speed regulation; All servos can be regarded as "PLC + motor speed regulation circuit + encoder".The start, acceleration, constant speed, deceleration and stop commands on the servo speed ladder diagram are all completed and output by the PLC counter; These running instructions arrive at the speed regulating circuit, and the speed regulating circuit implements the starting, acceleration, constant speed, deceleration and parking of the servo motor; The position ring is a counter of the PLC, the number of command pulses given by the user is used as the subtracted number, the pulse fed back by the encoder is used as the subtracted counting pulse, and the output number of the counter is compared with the given comparison circuit to output various running instructions.

Line 1, energized wiring: connect the positive pole and negative pole of the power supply to the input end of the inverter; 2. Motor Xunhe wiring: connect the U, V and W three phases of the output end of the inverter to the U1, V1 and W1 three phases of the motor; 3. Control wiring:

Connect the control line of the inverter to the input end of the two-speed motor controller; 4. Two-speed controller wiring: connect the U2, V2 and W2 three-phase of the output of the two-speed controller to the U2, V2 and W2 three-phase of the motor; 5. Alarm wiring: connect the alarm line of the inverter to the alarm end of the two-speed controller; 6. Control line wiring:

Connect the control line of the inverter to the control end of the two-speed controller; 7. Ground wire: connect the ground wire of the inverter to the ground wire of the two-speed controller.

Two-speed motor refers to a motor with two running speeds, and the two-speed motor belongs to the pole-changing speed regulation of asynchronous motor, which is to change the number of pole pairs of the stator rotating magnetic field by changing the link method of the stator winding, so as to change the speed of the motor.

The speed of the motor is changed by changing the connection of the windings, that is, changing the speed of the motor by changing the number of pole pairs of the motor's rotating magnetic field.

Two-speed motor (fan), usually low speed, sometimes the fan at high speed, mainly through the following external control line switching to change the winding connection of the motor coil to achieve:

1. Two common windings with different pole pairs are embedded in the stator slot, and the number of pole pairs is changed by changing the connection method of the stator winding of the motor through the switching of the external control circuit;

2. Two independent windings with different pole pairs are embedded in the stator slot;

3. There are two independent windings with different pole pairs embedded in the stator slot, and each winding can have different connections.

2. Two-speed motor wiring:

There are often two ways to connect the stator windings of two-speed motors: one is to change the winding from a triangle to a double star, and the other is to change the winding from a single star to a double star. Both of these connections reduce the number of pole pairs produced by the motor by half, i.e. double the speed of the motor.

3. There are two most common wiring methods for two-speed motors:

1.The windings were changed from a single star to a double star.

When this wiring method is used, the motor is changed from Y connection to Y connection, and the winding of each phase is changed from series connection to parallel connection, so that the number of pole pairs is less general. Using this switching method, the rated torque of the motor remains basically unchanged after the pole change speed regulation, so it is suitable for loads with the nature of constant torque of dragging, such as cranes and belt conveyors.

2.The winding is changed from a triangle to a double star (Y-shaped), and the triangle is changed to a double star, which also reduces the number of pole pairs by half, and obtains the speed regulation effect. After this pole-changing speed regulation, the rated power of the motor is basically unchanged, but the rated torque is almost reduced by half, so this connection method is suitable for dragging loads with constant power properties, such as various metal cutting machine tools.

When the speed of the three-phase asynchronous motor is regulated by the transformation of the number of pole pairs, the phase sequence of the power supply connected to the inlet terminal of the motor should be changed because the rotation direction of the rotating magnetic field of the winding will not change after the change.

Electrician knowledge: the working principle of the two-speed motor, the 15-minute wiring steps are explained one by one, and the operation is demonstrated.

Your diagram is a star angle start circuit, not a two-speed motor wiring. That's it, look at the picture.

This is the physical wiring diagram of the two-speed motor, and the schematic diagram, you can wire according to the diagram, I hope it will help you.

Summary. The working principle of the two-speed motor: The two-speed motor belongs to the asynchronous motor pole-changing speed regulation, which is to change the number of pole pairs of the stator rotating magnetic field by changing the connection method of the stator winding, so as to change the speed of the motor. The variable speed principle of a two-speed motor is:

The speed of the motor is changed by changing the way the windings are connected, that is.

Well. The speed of the motor is changed by changing the connection of the windings, that is, changing the number of pole pairs of the motor's rotating magnetic field cavity to change its speed. Two-speed Yuanxian motor (fan), usually low speed, sometimes the fan at high speed, mainly through the following external control line switching to change the winding connection of the motor coil to achieve the way of shooting.

The working principle of the two-speed motor is that the two-speed motor belongs to the asynchronous Zen potato motor pole-changing speed regulation, which is to change the number of pole pairs of the stator rotating magnetic field by changing the connection method of the stator stator winding, so as to change the speed of the motor. The speed change principle of the double attack speed motor is: the speed of the motor is changed by changing the connection mode of the winding, that is.

Two-speed fan control principle: The stator winding of the two-speed motor equipped with the two-speed fan is YY (or YY) and the basic principle of speed regulation is to change the connection between the stator windings of the simple motor to change the number of poles to achieve the purpose of the trouser speed of the mixing hall, and the low-speed work is (or Y) mode.

Schematic diagram of two-speed motor wiring diagram:

The variable speed principle of the two-speed motor is that the variable speed of the motor is selected to change the connection method of the winding, that is, the number of pole pairs of the rotating magnetic field of the modified land motor is used to change its speed. Two-speed motor (fan), usually low speed, sometimes the fan will rotate at high speed, the first thing is to change the winding of the motor coil through the switching of the external control line.

There are many ways to complete the speed regulation of the three-phase asynchronous motor, such as the selection of frequency conversion speed regulation (YVP frequency conversion speed regulation motor cooperation inverter use), change the excitation current speed regulation (use the YCT electromagnetic speed regulation motor cooperation controller to use the disturbance, can complete the stepless speed regulation), or change the motor Pole change speed regulation, that is, after changing the connection method of the stator winding, the number of poles of the rotating magnetic field of the stator is changed, and then the speed of the motor is changed.

According to the formula; n1=60f p can know that the synchronous speed of the asynchronous motor is inversely proportional to the number of pole pairs, the number of pole pairs is doubled, the synchronous speed n1 is reduced to half of the original speed, and the additional speed n of the motor will also be reduced by about half, so the change of the pole pair can reach the intention of changing the speed of the motor, this speed regulation method is staged, can not slip the speed regulation, and is only suitable for squirrel cage motor, which is the speed regulation principle of the two-speed motor.

Schematic diagram of two-speed motor wiring diagram:

The variable speed principle of the two-speed motor is that the variable speed of the motor is selected to change the connection method of the winding, that is, the speed of the motor is changed by changing the number of pole pairs of the rotating magnetic field of the motor. Two-speed motor (fan), usually low speed, sometimes the fan will rotate at high speed, the first thing is to change the winding connection method of the motor coil through the switching of external control circuits.

There are many ways to complete the speed regulation of the three-phase asynchronous motor, such as the selection of frequency conversion speed regulation (the use of YVP frequency conversion speed regulation motor with frequency converter), the change of excitation current speed regulation (the use of YCT electromagnetic speed regulation motor with the controller, which can complete the stepless speed regulation), and the motor can also be changed by changing the pole speed regulation, that is, by changing the connection method of the stator winding to reach the number of pole pairs of the rotating magnetic field of the stator and then changing the speed of the motor.

According to the formula; n1=60f p can know that the synchronous speed of the asynchronous motor is inversely proportional to the number of pole pairs, the number of pole pairs is doubled, the synchronous speed n1 is reduced to half of the original speed, and the additional speed n of the motor will also be reduced by about half, so the change of the pole pair can reach the intention of changing the speed of the motor, this speed regulation method is staged, can not slip the speed regulation, and is only suitable for squirrel cage motor, which is the speed regulation principle of the two-speed motor.

The working principle of the two-speed motor is that the speed of the motor is changed by changing the connection of the winding, that is, the speed of the motor is changed by changing the number of pole pairs of the rotating magnetic field of the vertical limb motor. It is mainly achieved by switching the following external control circuits to change the winding connection method of the motor coil.

1. Two common windings with different pole pairs are embedded in the stator slot, and the number of pole pairs is changed by changing the connection method of the stator winding of the motor through the switching of the external control circuit;

2. There are two independent windings with different pole pairs embedded in the stator slot, and each winding can have different connections;

3. The two-speed motor belongs to the pole-changing speed regulation of the asynchronous motor, which is to change the number of pole pairs of the stator rotating magnetic field by changing the connection method of the stator winding, so as to change the speed of the motor.