Three phase fully automatic CNC machine tool dedicated voltage regulator:
Compared with other types of voltage regulators, the three-phase fully automatic CNC machine tool dedicated voltage regulator has large capacity, high efficiency, no waveform distortion, and stable voltage regulation. It can overcome the extremely unstable voltage caused by the impact of high-power inductive loads on the power grid, adapt to a wide range of loads, withstand instantaneous overload, can work continuously for a long time, can switch manually and automatically, is equipped with automatic protection devices for overvoltage, undervoltage, phase sequence, and phase loss, and has other functions such as automatic power on, delayed output, output return, etc. It is easy to install and has strong operational reliability

current function

Automatically power on.

Delay output.

Output back to the center.

Undervoltage, overvoltage, phase sequence, phase failure, and mechanical fault protection.

Sound and light alarm.

Switching between voltage regulation and mains power at will.

Standard configuration
1. Air switch
2. AC contactor
3. Phase sequence protector
4. Compensation transformer
5. Adjust the transformer
6. Transformer
7. LCD digital comprehensive display instrument
8. Transmission chain
9. True RMS sampling purification computer control assembly
10. Permanent magnet low-speed motor
11. Auxiliary transformer cable
12. Imported wear-resistant electric brushes
13. Cabinet
14. Maintenance free guide rail for aluminum alloy transmission
15. T2 oxygen free copper bar
16. Isolation switch

Technical indicators and characteristics
·Input voltage range: 380V ± 20% (304V-456V)
·Output voltage stabilization accuracy: 380V ± 1-5% adjustable (able to withstand 5 times instantaneous current)
·Frequency: 50Hz-60Hz
·Voltage resistance: 2000V, no breakdown for 1 minute
·Efficiency:>98%
·Waveform distortion: none
·Response speed: ≤ 1.2s
·Insulation level: F-class 155 ℃
·Insulation resistance: ≥ 2M Ω

·Features: Equipped with a purification true effective value sampling electronic board (for the magnetic field, electromagnetic waves, and harmonic interference generated during the operation of frequency converters and capacitor compensators, as well as the suppression of output voltage fluctuations).

working principle
The SBW series voltage regulator consists of a three-phase compensation transformer TB, a three-phase voltage regulating transformer TUV voltage detection unit, servo motor control and transmission mechanism, contactor operation circuit, protection circuit, etc. The schematic diagram of its gas generation principle is shown in Figure 1.
The primary winding of the voltage regulating transformer TUV is connected in a Y-shape to the output terminal of the voltage regulator, and the secondary winding is connected to the primary winding of the compensating transformer TB, which is connected in series in the main circuit. Now, taking phase A as the column, explain its voltage stabilization working principle, as shown in Figure 2. If the impedance drop of the compensating transformer is not taken into account, as shown in Figure 2:

UA0=UAI+UAC
In the formula: UAI -- Input voltage of phase A of the voltage regulator;
UA0-- Voltage regulator A-phase output voltage;
UPC - phase compensation voltage of voltage regulator A;

The principle is that when the input voltage UAI of phase A increases by Δ UAI, the compensation voltage UAC also changes accordingly by Δ UAC, and UAC=- UAI, so that the output voltage UA0 of phase A remains unchanged. Similarly, the same applies to phases B and C.

The voltage stabilization process is as follows: based on the change of output voltage, the voltage detection unit samples, detects and outputs a signal to control the servo motor SM to rotate. The secondary voltage of the voltage regulating transformer TUV is adjusted by sliding (or rolling) the brush group on the voltage regulating transformer TUV through the deceleration mechanism and driven by the chain to change the polarity and magnitude of the compensation voltage, achieving automatic stabilization of the output voltage within the allowable range of voltage stabilization setting accuracy, thus achieving the purpose of automatic voltage stabilization.