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Air Conditioner Motor Protection Is Very Important

Zhejiang Kening Motor Co.,Ltd | Updated: Aug 16, 2017

After a hundred years of development, the application of the Air Conditioner Motor has been very extensive. Air Conditioner Motor-driven products covered by the automotive and industrial applications, it is the main trend of the Air Conditioner Motor market a microcosm. The first is the trend of automotive electrification, that is, car manufacturers with integrated energy-efficient Air Conditioner Motor to replace the traditional internal combustion engine power, usually with a brushless DC (BLDC) Air Conditioner Motor instead of belt and gear drive for the hood under the auxiliary components, such as pumps, Valves, heating and air conditioning, fans and so on. As the BLDC Air Conditioner Motor has a very good performance, but also began to enter the traditional brushless DC (BDC) Air Conditioner Motor program of other applications.

     Another trend is that the increase in the application rate increases the number of Air Conditioner Motor installations, such as Air Conditioner Motorized HVAC valves (mainly for brushless DC and monopole stepper Air Conditioner Motors) that are also used in lower-end vehicles Of the HVAC system.

In many electrical appliances, will use one thing, that is, Air Conditioner Motor, it can be said that the Air Conditioner Motor is the core of many electrical appliances. The use of the Air Conditioner Motor and the process will inevitably be damaged, so the Air Conditioner Motor protection is very important, then the actual application of Air Conditioner Motor protection is mainly used to achieve the way?

1 Use the thermal relay to measure whether the current exceeds the rated current of the Air Conditioner Motor and adjust the set current value. When the Air Conditioner Motor is running, the auxiliary head of the thermal relay, the normally closed point is broken, and the normally closed point is closed. In the relay control, the normally closed point and stop button in series, overload the Air Conditioner Motor to stop, and give the alarm signal. If there is a PLC in the control system, the normally open or normally closed action signal into the PLC signal input, through the program to control the Air Conditioner Motor start and stop. Such as the introduction of normally open as a stop signal X input with a normally closed point, and vice versa.

2 use of temperature protection Air Conditioner Motor, the use of implanted thermal devices for protection. When the temperature is too high, the signal is given through the external control loop protection. Or the use of thermal resistance, thermocouple measuring the temperature of the Air Conditioner Motor through the temperature controller gives the overheating signal, thus protecting the Air Conditioner Motor.

3 using the current transformer to measure the Air Conditioner Motor into the line three-phase zero sequence is zero, generally used for larger power Air Conditioner Motor. The specific method is: according to the size of the Air Conditioner Motor power to choose the appropriate current transformer, installed in the Air Conditioner Motor control box into the line side. A phase B phase C phase are connected, the A B C current transformer L1 terminal connected to a thermal relay on the line side, the A B C current transformer L2 end star, star point into the zero line. When the three-phase imbalance, or when the current is too high thermal relay action, normally open, normally closed action. The action signal into the control circuit to cut off the current to protect the Air Conditioner Motor to achieve the purpose.

The Air Conditioner Motor is a rotary machine that converts electrical energy into mechanical energy, which mainly includes an electromagnet winding or a distributed stator winding and a rotating armature or rotor for generating a magnetic field with current and a magnetic field The role of the rotation, some of these machines can be used for Air Conditioner Motor, but also for the generator. It is a machine that converts electrical energy into mechanical energy. Usually the Air Conditioner Motor part of the work for the rotary motion, this Air Conditioner Motor is called the rotor Air Conditioner Motor; also for linear motion, known as the linear Air Conditioner Motor. The Air Conditioner Motor can provide a wide range of power from milliwatts to kilowatts. Air Conditioner Motor use and control is very convenient, with self-starting, acceleration, braking, reversing, handling and other capacity to meet a variety of operating requirements; Air Conditioner Motor work efficiency is high, and no smoke, smell, do not pollute the environment, noise Also smaller. Because of its series of advantages, it is widely used in industrial and agricultural production, transportation, defense, commercial and household appliances, medical equipment and other aspects.