High speed CNC contactless voltage regulator

The Requirements for Voltage Stabilizers in the Digital Construction of Sohu Network Broadcasting and Television

1、 The New Generation of Intelligent Voltage Regulators - SWDT Series High Speed CNC Contactless Voltage Regulators

1. In principle, it completely abandons the previous method of relying on electric motors to drive carbon brushes for voltage regulation, and solves the disadvantages of mechanical chain type voltage regulators such as slow response speed, multiple contacts, severe wear of carbon brushes, poor contact, and inability to achieve maintenance free and unmanned requirements.

2. It adopts DSP operation measurement chip, fast AC sampling technology, effective value correction technology, current zero crossing switching technology, and fast compensation voltage regulation technology, combining intelligent instruments, fast voltage regulation, and fault diagnosis, making the product highly reliable, intelligent, efficient, precise, and energy-saving. It is an ideal replacement for ordinary voltage regulators.

3. The application of more technological elements has made the overall design of the product simple and smooth, with small size and light weight, achieving product intelligence and strong functionality fully reflected in the product. Whether it's Chinese LCD display, intelligent management system, abnormal event recording, arbitrary setting of voltage stabilizing parameters, temperature controlled fan cooling, or intelligent automatic bypass, high and low voltage phase loss, and comprehensive communication methods, we strive for excellence in every aspect.

2、 Product performance characteristics

■ Operational reliability

1. No mechanical transmission, no carbon brush wear, long service life and maintenance free, with a fault free working time of more than 100000 hours.

2. The main core device, the thyristor module, is selected from internationally renowned European and American brands, imported with original equipment, ensuring operational stability and reliability.

3. The microcomputer (DSP) is imported from the United States and is a controlled product.

4. The power supply of the control system adopts ultra isolation and wide range stable voltage supply. Even in extremely harsh power grid environments with extremely high and low voltage, the voltage regulator can work freely.

5. Each voltage regulator is equipped with a set of high flow rate voltage limiting surge protection modules, which can effectively absorb transient overvoltage caused by internal power grid surges and external induced lightning strikes, ensuring the safe operation of electrical equipment.

■ progressiveness technology

1. Single compensation with self coupling circuit structure, no waveform distortion, no phase distortion, and strong load adaptability.

2. Exclusive selection of a 16 bit microcomputer as the control core of the voltage regulator, with fast calculation speed and high accuracy, achieving intelligent control.

3. Exclusive selection of sensors for analog sampling, direct calculation of AC true effective value, elimination of traditional multi group potentiometer adjustment circuit, improved control accuracy and response time.

4. Three control boards control the three-phase circuit and adjust the three single-phase circuits separately, resulting in a simple and highly integrated circuit.

■Intelligent control function

1. Full Chinese LCD display, real-time reflection of the operating parameters of the voltage regulator. According to the on-site usage environment, different operating parameters can be flexibly set through buttons, and the electrical equipment can work in the optimal operating state.

2. Black box function: It can record abnormal historical events, accurately record the occurrence time, type, and detailed parameters, and provide detailed data for quick troubleshooting.

3. Intelligent automatic bypass function: When a certain phase of the voltage regulator malfunctions, the input voltage is within the allowable range, and the faulty phase automatically switches to bypass power supply. The non faulty phase continues to stabilize the output to ensure power supply continuity.

■ Comprehensive protection functions

1. Overvoltage and undervoltage protection function: When the power supply voltage seriously deviates from the stable voltage range, the output is cut off and an alarm signal is issued. After the power grid voltage is normal, it has the function of automatically restoring stable voltage output.

2. Overcurrent and short circuit protection function: When the electrical equipment experiences severe overload, the output is cut off after a delay, and an alarm signal is issued. When a short circuit occurs, the output is quickly cut off.

3. Phase loss protection function: When the power supply is in phase loss, it cuts off the three-phase output and sends an alarm signal. After the power supply is normal, it automatically restores the stable output

4. Wrong phase protection function: When the phase sequence of the power supply is incorrect, immediately cut off the voltage stabilizing output and issue an alarm signal.

5. Delay output function: When the voltage regulator is initially connected to the power supply or restored to normal due to a power outage in the power grid, the voltage regulator will delay for 5-10 seconds before executing the voltage regulator output to protect the electrical equipment from impact damage

6. Manual through function: When the voltage regulator needs maintenance, it can be manually switched to the "through" operating state to ensure uninterrupted power supply to the electrical equipment.

■Efficient and energy-saving performance

1. The unique patented technology of infinite current devices eliminates additional losses, reduces temperature rise, reduces load effects, and improves efficiency.

2. The transformer core is made of high-quality silicon steel sheets, which have been specially optimized for low loss and high efficiency. The no-load current of the three-phase voltage regulator reaches milliampere level, leading the industry.

3. Temperature controlled fan, energy-saving and noise reducing, extending service life

3、 Electrical Principles

This system uses a 16 bit microcontroller to form the control core. Through precise sampling of input voltage Ui, output voltage Uo, and load current IF signals, A/D conversion, the microcontroller makes intelligent judgments and sends control instructions. The combination of bidirectional thyristor conduction is used to change the Δ The polarity and size of U are used to compensate for the input voltage Ui and maintain stable output voltage Uo.

The Requirements for Voltage Stabilizers in the Digital Construction of Sohu Network Broadcasting and Television

Models: SWDT-3350, SWDT-3380... SWDT-33200, SWDT-33250... SWDT-3350

Rated capacity: 50KVA, 80KVA... 200KVA, 250KVA... 800KVA

Production method: DSP calculation and measurement chip+SCR module+CPU control center+isolation transformer

Input voltage: AC3P4W 380V ± 15% (or 20% or specified in advance)

Output voltage: AC3P4W 380V

Output accuracy: ± 1%

Frequency: 50/60Hz

Reaction time: 4ms/step

Output waveform: No distortion or harmonic increment in the output waveform

Efficiency: ≥ 99% (at full load)/No load power consumption ≤ 1%

Adjustment method: three-phase split adjustment, output imbalance less than 1%

Overvoltage protection: Cut off the output when the output phase voltage exceeds 10% (245V)

Undervoltage protection: Cut off the output when the output phase voltage is below 10% (195V)

Overload protection: Electronic detection, overload for 5 minutes, AC circuit breaker cuts off output. Dual protection

Short circuit protection: Electronic detection, AC circuit breaker momentarily cuts off output. Dual protection

Overcurrent protection: The output can be cut off when the maximum current value of the three phases reaches or exceeds this value

Bypass protection: Zero second automatic switching of bypass, manual bypass both have

Delayed output: Delayed output for 3 to 5 seconds after startup

Noise elimination: equipped with a surge absorber and LC filter

Phase loss protection: equipped with phase loss protection (optional)

Phase sequence protection: equipment cannot be turned on during reverse phase and phase mismatch (optional)

Overheat protection: Cut off input when the temperature exceeds 115 ℃ (optional)

Lightning protection: Install surge protection switch, C-level lightning protection (optional)

Digital display: LCD screen displays three-phase input/output voltage and current (English display available)

Status display: stabilized state/mains state/overvoltage state/undervoltage state

Recording function: Exclusive technology "black box" function, which can record abnormal historical events, accurately record the occurrence time, type, and detailed parameters, providing detailed data for quick troubleshooting (standard configuration)

Instantaneous overload capacity: 200% can maintain for 10 seconds, 500% can maintain for 50ms

Remote control: optional remote control through computer (optional)

Communication interface: RS485, can be connected to the computer to monitor the operation status of the voltage regulator (optional)

Cooling method: air cooling/or temperature control, automatic start above 55 ℃

The above data is for reference only, and I will make adjustments according to the actual situation.

1. Environmental temperature: -5 ℃~40 ℃

2. Humidity: 0-95%

3. Altitude: not exceeding 2000m

4. Installation site: Gas, steam, dust, dirt, and other explosive and corrosive media without severe insulation

5. Installation site: There should be no severe vibration or bumps

6. Other instructions: Any special usage conditions that do not meet the above regulations should be determined through consultation between the user unit and our factory