How to start a 11KW8 motor?

In fact, if he wants to start this motor, it is very simple, turn on the power directly, and then it will start normally, and the speed of stopping may be a little slower.

This kind of motor must use a starting capacitor, otherwise it will not be able to rotate, or it will be operated mechanically.

How to start the M8G motor? It can be started with an electric air compensator and then run again.

An 11 kW eight-pole motor can lead to a three-phase power supply. The store is launched.

If this starts, is it started by electric or what? It's best to ask the manufacturer.

Started by a large capacitor, hopefully.

This power is generally done with a soft start.

How to start an 11 kW class 8 motor? You have to know how he starts, I personally suggest that you still have to consult a professional well, and the motor master will know.

Let's start the motor, I suggest you log on to the official ** of the motor.

Summary. If the starting DC multiple (i.e., ist in) of the motor is less than the value on the right side of the above formula, it can be started directly.

Hello, I have seen your question and am sorting out the answer, please wait for a while It is not recommended that motors above 10kw should be started in the star delta or step-down.

The starting method of the fifteen kilowatt eight-stage motor is:

1. Full pressure direct start.

2. The motor starting mode includes: full-voltage direct start, auto-decompression start, Y-δ start, soft starter, and frequency converter.

Full pressure direct start:

In cases where both the grid capacity and load allow for full-voltage direct starting, full-voltage direct starting can be considered. The advantages are convenient control and control, simple maintenance, and relatively economical. It is mainly used for the starting of low-power motors, and from the perspective of saving electric energy, motors greater than 11kw should not use this method.

Auto-decompression start:

The use of autotransformer multi-tap decompression, can not only adapt to the needs of different load starting, but also can get a larger starting torque, is a kind of decompression starting method often used to start a larger capacity motor. Its biggest advantage is that the starting torque is larger, when its winding tap is at 80%, the starting torque can reach 64% when starting directly. And the starting torque can be adjusted by tapping.

It is still widely used today.

Y-δ Start:

For the squirrel cage asynchronous motor with the normal operation of the stator winding triangle connection, if the stator winding is connected into a star shape at the time of starting, and then connected into a triangle after the start is completed, the starting current can be reduced and its impact on the power grid can be reduced. This type of starting is called star-delta decompression starting, or simply star-delta starting (Y-δ starting). When the star triangle is used for starting, the starting current is only 1 3 when the original triangle connection is directly started.

If the starting current at direct start is calculated as 6 7ie, then when starting in the star delta, the starting current is only 2 times. That is to say, when the star triangle is used to start, the starting torque is also reduced to 1 3 when the original triangular connection is directly started. It is suitable for no-load or light-load starting.

And compared with any other decompression starter, its structure is the simplest, and the cheapest. In addition, the star-delta starting method also has the advantage of allowing the motor to run under the star-shaped connection when the load is light. In this case, the rated torque can be matched to the load, which increases the efficiency of the motor and thus saves power consumption.

Soft starter: This is the use of the thyristor's phase shift voltage regulation principle to achieve the voltage regulation and start of the motor, mainly used for the starting control of the motor, the starting effect is good but the cost is high. Due to the use of thyristor components, the harmonic interference of the thyristor is large when working, which has a certain impact on the power grid. In addition, fluctuations in the power grid can also affect the conduction of thyristor components, especially when there are multiple thyristors in the same grid.

As a result, thyristor components have a high failure rate and therefore place high demands on maintenance technicians because of the power electronics involved.

Inverter: Inverter is the motor control device with the highest technical content, the most complete control function and the best control effect in the field of modern motor control, which adjusts the speed and torque of the motor by changing the frequency of the power grid. Because it involves power electronics technology and microcomputer technology, the cost is high and the requirements for maintenance technicians are also high, so it is mainly used in the field that requires speed regulation and high requirements for speed control.

Typically actuated using a rotor string resistor. Then switch the resistor to change the motor speed.

The 15kw motor direct contactor can be started, ( If you want to make a starting method, then the star angle is converted.

You can choose the starting mode according to the motor type, working mode and the actual situation of the power supply, the squirrel cage rotor motor can choose direct start (hard start) under the condition that the available power of the power supply is 3 times the motor power, and you can choose soft start (y start, auto-coupling step-down start, electronic soft starter, etc.) if the above conditions are not met.

The wound rotor motor is started by the rotor winding series resistance (solid resistance, liquid resistance, frequency sensitive varistor, etc.).

Both of the above types of motors can be started by means of variable frequency starting.

Note: The motor type, site environment, working mode, economy and practicality and other aspects consider the selection of starting method.

It is possible to start with half pressure.

This question should not be confused with electrical power. Kilowatt is a unit of electrical power, which refers to the amount of electricity consumed per second, and 11kW refers to the consumption of 11 kilojoules of electrical energy per second, not the energy consumption of one hour. The landlord's question is how many kilowatts of electricity will be used for start-up, or in terms of electrical power.

In general, the starting current of the motor is 5 7 times of the rated current, because the voltage is unchanged, therefore, the power at starting should also be 5 7 times the rated power, for the 11kw motor should be 55 77kw. Since it is a reference to power, it is only in terms of unit time, so it has nothing to do with the length of the start-up time.

It should be noted that the starting current is not constant, it will decrease as the speed rises, so if you want to calculate the energy consumption during the start-up process, it involves the length of the start-up time, and it is necessary to use integrals.

The normal starting current of the motor is 6 7 times of the rated current of the sign, and the rated current of 11kw is about 21 22A (380V, 2900R min), and the motor of this power is basically started directly. The start-up time is a few seconds (2-5 seconds).

The 11kw of the motor refers to the energy consumption of one hour during the normal operation of the motor. Therefore, the energy consumption of start-up should be around the estimate). It takes a lot of data to determine, and it is cumbersome.

The test method is very simple, that is, add a power meter on the main line of the control cabinet, and you can intuitively see the power consumption in kilowatts.