What is a control transformer?
On CNC lathes or other electrical equipment that must have a high safety factor, the power supply of the control circuit must be low-voltage, some 127V and some 36V. Therefore, it is necessary to change 380V or 220 voltage from 100-150w transformer to this kind of voltage. This kind of transformer is called control transformer or line lamp transformer. Bk50 control transformer wiring method.
How is the control transformer correctly connected?
One type 380V, capable of connecting all two stages to 380 and 0 positions. The key of the control transformer is applicable to the communication AC 50Hz (or 60Hz), voltage 1000V and the following power circuits. It is generally used for CNC lathes and industrial equipment as the power supply for lighting lamps and display lamps of the electrical control system.
The control transformer is small and medium-sized dry-type transformer. It is often used as the power supply system for some lighting lamps, signal indicator lamps or display lamps, and as the control circuit power supply system in electrical equipment. The magnetic effect of working current. The transformer has two coils. Primary and secondary coils. The secondary coil is outside the primary coil. When the primary coil is connected with AC current, the transformer core causes alternating electromagnetic field, and the secondary coil causes induced current. The coil turn ratio of transformer coil in saturated state is equivalent to voltage ratio.
The basic parameters of transformer are voltage ratio, voltage regulation rate, copper resistor, high efficiency, temperature rise and resistor. Different types of transformers have some unique regulations. The transformer shall have sufficient long service life.
The key factor to determine the service life of low-voltage transformer is thermal aging. The evaporation of paint layer makes the insulating layer material brittle and cracked, resulting in electric shock. When the operating temperature increases by 8 ~ 10 ℃, the service life is reduced by half.
What is the effect of the control transformer?
Function of control transformer: conveniently obtain suitable voltage; Secondary grounding prohibited device; Anti interference.The key of the control transformer is applicable to the communication AC 50Hz (or 60Hz), voltage 1000V and the following power circuits, which can work continuously for a long time under the rated value. It is generally used for CNC lathes and industrial equipment as lighting lamps and marking power supply for electrical control system.
Working principle:The basic principle of magnetic effect of current selected for control transformer. The transformer has two coils. Primary and secondary coils. The secondary coil is outside the primary coil. When the primary coil is connected with AC current, the transformer core causes alternating electromagnetic field, and the secondary coil causes induced current. The coil turn ratio of transformer coil in saturated state is equivalent to voltage ratio.The control transformer is used to change the setting of communication AC voltage. It is composed of transformer core and coil transmission line.It can not only change the voltage of AC current, but also change the characteristic impedance, and can change the electric flow without exceeding the output power of the design scheme. In different natural environment, the application of transformer is also different.
1. In order to reduce the route loss, the power project from the power station must be first upgraded to hundreds of thousands of volts (for example. 11kv), followed by blood pressure reduction (e.g. 380V) upon arrival at the station.
2. In the electronic device operational amplifier, in order to complete the minimum energy consumption in the middle of multi line amplification, the matching resistance and transformer connection can have the effect of changing the characteristic impedance.
3. During electric welding, the electric flow required between the electrode and the weldment is very large (tens to hundreds of AMPS), but the voltage is small (a few volts). DC welding machine is a transformer that changes high voltage (such as 380V) into low voltage. Without changing the output power, large current flow is caused at the output. Control transformer applications.
4. In the natural environment, sometimes different voltages are required. The transformer can be made into multi winding resistance or positive middle tap type. Several voltages are then caused.
In the communication AC controller, the number of output coils changes immediately to achieve the purpose of adjusting the output voltage. BK series transformers can be divided into casing type according to structure and column type according to installation method. BK transformer is a new type of transformer power supply developed in China. It has the characteristics of small size, reliable connection, high waterproof grade and good characteristics.