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Fuji Electric Thailand Co.,Ltd.

ข้อมูลติดต่อ แผนที่และเส้นทาง แบบฟอร์มติดต่อ เวลาทำการ บริการ คะแนนรีวิว รูปภาพ วิดีโอ และข่าวสารจาก Fuji Electric Thailand Co.,Ltd., 43 Thai CC Tower 11th Floor, Room # 114/9, South Sathorn Road, Yannawa, Sathorn, Bangkok

Fuji Electric (Thailand) is focusing on Power Supply with Energy Saving and Green Solution in Greater Mekong Sub-region for
1) Transmission and distribution product
2) Process and Factory Automation
3) Distribution and Control Product
4) Vending Machine

21/09/2026

Regenerative Loads: When Do You Need a Dynamic Braking Resistor? (Ep. 5 of 5)

Fuji Electric AC Drive Solutions
Fuji Electric offers advanced AC drive solutions designed to handle demanding industrial applications, including regenerative load conditions. Our drive technologies provide reliable motor control, flexible braking integration, and high-performance operation across a wide range of industries.

Fuji Electric drives support:
• Dynamic braking configurations
• High-performance motor control
• Fast response applications
• High-inertia load management
• Industrial automation systems
• Energy-efficient operation

Whether your application involves conveyors, cranes, fans, hoists, or heavy industrial machinery, Fuji Electric can help identify the right drive and braking solution to improve performance and reliability.

Regenerative energy is a common challenge in many AC drive applications, particularly those involving rapid deceleration, high inertia, or overhauling loads. Without proper energy management, regenerative conditions can lead to overvoltage faults, downtime, and reduced system reliability.

Dynamic braking resistors provide a practical and effective method for dissipating excess energy and maintaining stable drive operation. By understanding when regenerative braking occurs and selecting the appropriate braking solution, facilities can improve uptime, protect equipment, and optimize motion control performance.

As industrial systems continue demanding faster speeds, greater precision, and higher efficiency, effective regenerative energy management will remain an essential part of modern AC drive system design.

14/09/2026

Regenerative Loads: When Do You Need a Dynamic Braking Resistor? (Ep. 4 of 5)

Regenerative Drives
Advantages:
• Returns energy to the electrical system
• Improved overall efficiency
• Better for continuous regeneration
• Reduced heat generation

Considerations:
• Higher initial cost
• More complex system integration
• May require harmonic mitigation considerations

For many industrial applications with occasional deceleration events, dynamic braking remains the preferred solution due to its simplicity and cost effectiveness.

Proper Braking Resistor Sizing Matters
Selecting the correct resistor is critical for reliable operation.

Important sizing factors include:
• Motor horsepower
• DC bus voltage
• Braking torque requirements
• Duty cycle
• Deceleration time
• Load inertia
• Ambient temperature

Undersized resistors can overheat or fail prematurely, while oversized systems may increase unnecessary cost.
Thermal management is also important because braking resistors can generate substantial heat during operation.

Improving Reliability in Regenerative Applications
Proper system design can help minimize braking-related issues and improve long-term reliability.

Best practices include:
• Verify load inertia during system design
• Avoid unnecessarily aggressive deceleration ramps
• Ensure proper resistor ventilation
• Follow manufacturer sizing guidelines
• Monitor braking duty cycle
• Consider regenerative drives for continuous energy feedback applications

Understanding the behavior of regenerative loads early in the
design process helps prevent nuisance trips and improves overall system performance.

06/09/2026

Regenerative Loads: When Do You Need a Dynamic Braking Resistor? (Ep. 3 of 5)

High Inertia Loads

Loads with large rotating masses store more kinetic energy. Even moderate deceleration rates can generate substantial regenerative power.

Examples include:
• Large fans
• Crushers
• Centrifuges
• Heavy conveyors

Vertical or Overhauling Loads

Whenever gravity assists motion, the motor can easily become regenerative. Hoists, elevators, cranes, and winches frequently require braking solutions.

Frequent Cycling

Applications with constant start-stop operation can repeatedly generate regenerative energy. Over time, this can create recurring overvoltage faults without proper braking.

Overvoltage Faults During Deceleration

One of the clearest signs that braking may be required is repeated DC bus overvoltage trips during stopping.
If extending deceleration time is not practical, a braking resistor may be the best solution.

When a Braking Resistor May Not Be Necessary

Some applications naturally dissipate energy through system losses and may not require external braking.

Examples include:
• Low inertia loads
• Long deceleration times
• Constant-speed applications
• Systems with infrequent stopping

Many modern AC drives can also use techniques such as flux braking or controlled deceleration to help manage smaller regenerative conditions.

Dynamic Braking vs. Regenerative Drives

While braking resistors dissipate energy as heat, regenerative drive systems return excess energy back to the power grid.
Each approach has advantages depending on the application.

Dynamic Braking Resistors
Advantages:
• Lower initial cost
• Simpler installation
• Effective for intermittent braking
• Compact solution

Considerations:
• Energy is wasted as heat
• Additional heat management may be required
• Limited continuous braking capability

31/08/2026

Regenerative Loads: When Do You Need a Dynamic Braking Resistor? (Ep. 2 of 5)

What Happens Without Proper Braking?
When regenerative energy cannot be dissipated or redirected, several issues may occur:
• DC bus overvoltage trips
• Unexpected downtime
• Loss of process control
• Excessive stopping times
• Reduced system reliability
• Potential stress on drive components

In some cases, operators attempt to solve the issue by increasing deceleration times. While this can reduce regenerative energy, it may not meet process requirements where rapid stopping is necessary.

What Is a Dynamic Braking Resistor?
A dynamic braking resistor dissipates excess regenerative energy as heat.
When the DC bus voltage rises above a predefined threshold, the drive activates a braking transistor (sometimes called a chopper transistor). The transistor directs excess energy into the resistor, where it is converted into thermal energy and safely dissipated.

This allows the drive to:
• Decelerate loads faster
• Prevent overvoltage faults
• Improve stopping performance
• Maintain process control
• Protect drive electronics

Dynamic braking is one of the simplest and most cost-effective solutions for handling intermittent regenerative energy.

How Dynamic Braking Works
The process can be summarized in four basic steps:
1. The motor begins decelerating.
2. The motor generates regenerative energy.
3. DC bus voltage inside the drive increases.
4. The braking transistor switches energy into the resistor.

The resistor absorbs and dissipates the energy as heat until the DC bus voltage returns to a safe range.

Because the resistor converts energy into heat, proper sizing and ventilation are important considerations.

When Do You Need a Dynamic Braking Resistor?
Not every AC drive application requires a braking resistor. Several factors determine whether one is necessary.

Fast Deceleration Requirements
If the application requires rapid stopping times, regenerative energy increases significantly. The shorter the deceleration ramp, the greater the braking demand.

Applications that need aggressive acceleration and deceleration cycles often benefit from braking resistors.

24/08/2026

Regenerative Loads: When Do You Need a Dynamic Braking Resistor? (Ep. 1 of 5)

Modern AC drive systems are designed to deliver precise motor control, energy efficiency, and reliable operation across a wide range of industrial applications. However, some applications create a unique challenge for variable frequency drives (VFDs): regenerative energy.

When a motor slows down or is driven by the5load itself, it can act like a generator and send energy back into the drive. If that energy is not properly managed, it can cause nuisance trips, overvoltage faults, or even equipment damage. One of the most common solutions is a dynamic braking resistor.

Understanding when regenerative energy occurs , and when a braking resistor is required , is essential for designing reliable motion control systems.

> What Is a Regenerative Load?

A regenerative load occurs when the mechanical system drives the motor faster than the commanded speed or when the motor rapidly decelerates. Instead of consuming power, the motor generates power and sends it back into the DC bus of the AC drive.

As regenerative energy builds inside the drive, the DC bus voltage rises. If the voltage exceeds safe operating limits, the drive will typically trip on a DC bus overvoltage fault.

Regenerative conditions commonly occur in applications with:
• Rapid deceleration
• High inertia loads
• Overhauling loads
• Vertical motion systems
• Frequent stopping and starting
• Continuous energy feedback from the process

> Common Applications That Create Regenerative Energy

Several industrial applications are naturally regenerative due to the physics of the load.

> Conveyors with High Inertia

Long conveyors transporting heavy products often store large amounts of kinetic energy. During deceleration, that energy must go somewhere. Without a braking method, the drive may experience overvoltage conditions.

> Centrifuges and Flywheel Loads

High-speed rotating equipment stores significant rotational energy. Fast stopping times can generate large regenerative currents as the motor attempts to slow the system.

> Cranes, Hoists, and Elevators

Vertical loads are among the most common regenerative applications. Gravity can drive the motor during lowering operations, continuously feeding energy back into the drive.

> Fans and Blowers

Large fans may continue spinning due to airflow or momentum after a stop command. Applications with aggressive deceleration ramps can become regenerative.

> Unwind Systems

In web handling and converting operations, tension-controlled unwind systems often operate in regenerative mode because the material roll drives the motor.

17/08/2026

[Announcement] World’s First! Launching the "Ejector Cooling Unit" to reduce server cooling power consumption in liquid-cooled data centers by up to 85% (*1)

▼ Read the full press release here
https://www.fujielectric.com/about/news/detail/1206048_5357.html?utm_source=Facebook&utm_medium=social&utm_campaign=260807&fbclid=IwY2xjawTrr5FwZG9mAWV4dG4DYWVtAjEwAGJyaWQRMWxWZVhPT1ZzTGFKZllOMk5zcnRjBmFwcF9pZBAyMjIwMzkxNzg4MjAwODkyAAEeurvu-Oq_5qzBqJaBJqPRFpbxz8qVkRYtJaZio6gHxMDIU42J_idMezQcY8w_aem_BYNV5dUopwTQCHmZjtQJrg

Fuji Electric has developed a revolutionary new cooling unit to address power challenges in , where power consumption is rapidly increasing due to the growth of generative AI (available for sale in June 2026). By replacing traditional chillers in water-cooling systems—the rapidly growing mainstream cooling method—with this product, remarkable energy savings can be achieved.

▼ Features and benefits of the Ejector Cooling Unit
✓ Achieving remarkable energy savings: Using our proprietary "fluid compressor (ejector)" reduces server cooling power consumption by up to 85% (*1).
✓ Recycling waste heat from servers: Reuses server waste heat as an energy source by recovering heat from warm water (inlet temp: 40–80°C) to generate chilled water.
✓ Adopting eco-friendly low-GWP refrigerant: Uses a low-GWP refrigerant with minimal global warming impact, contributing to sustainable data center operations.

(*1: When used over a three-month summer period)

We will continue to help data center operators solve their power challenges by drastically reducing energy used for server cooling.

10/08/2026

Should I select a UPS with lead-acid or lithium batteries for critical power applications?(Ep. 3 of 3)

 Comparison Table
Feature Lead-Acid Batteries Lithium-Ion Batteries
Initial Cost Low High
Lifespan 3–5 years 8–15 years
Energy Density Low High
Weight and Size Heavy and bulky Lightweight and compact
Temperature Tolerance Narrow (25°C ideal) Wide (0–45°C typical)
Maintenance High Low
Replacement Frequency Frequent Rare
Cycling Capability Moderate High
Compatibility Universally supported May require specific UPS systems
Safety Stable but less efficient Advanced safety mechanisms
TCO Higher due to frequent Lower over time
replacement

 Recommendation by Use Case
Short-Term Budget-Friendly Solutions:
• Lead-acid batteries are a practical choice if cost constraints are critical and the system operates in a controlled environment with infrequent power outages.

High-Performance, Long-Term Critical Systems:
• Lithium-ion batteries are ideal for applications where reliability, longevity, and efficiency are paramount, such as:
• Data centers
• Hospitals
• Telecommunication hubs
• Industrial automation

 Future-Proofing and Scalability:
• Lithium-ion batteries offer better scalability and adaptability for modern smart grid or renewable energy integration.

If initial cost is your main concern and the application involves light cycling with a controlled environment, lead-acid batteries are a practical choice. However, for critical power applications requiring higher reliability, longer lifespan, compact design, and better overall performance, lithium-ion batteries are the better option despite the higher upfront cost.

03/08/2026

Should I select a UPS with lead-acid or lithium batteries for critical power applications?(Ep. 2 of 3)

 Lithium-Ion Batteries

Advantages:
1. Longer Lifespan:
• Typically lasts 8–15 years, significantly reducing replacement frequency.
2. Compact and Lightweight:
• Higher energy density means smaller, lighter battery banks for the same capacity.
3. Better Performance:
• Handles frequent cycling and high discharge rates more effectively.
• Operates efficiently across a broader temperature range.
4. Lower Maintenance:
• Requires minimal maintenance, especially compared to lead-acid.
5. Advanced Monitoring:
• Often comes with built-in Battery Management Systems (BMS) for better health monitoring and safety.
6. TCO Benefits:
• Higher upfront cost is offset by longer lifespan, reduced maintenance, and higher efficiency.

Disadvantages:
1. Higher Initial Cost:
• Significant upfront investment compared to lead-acid batteries.
2. Special Handling:
• Requires advanced safety mechanisms to manage thermal runaway and prevent overheating.
3. Technology Compatibility:
• Some older UPS systems may not support lithium-ion batteries, requiring upgrades.

Best Applications:
• High-reliability critical power systems with frequent cycling or long-duration backup needs.
• Environments with space and weight constraints, such as data centers or telecom installations.
• Applications requiring reduced TCO over a long operational life.

27/07/2026

Should I select a UPS with lead-acid or lithium batteries for critical power applications?(Ep. 1 of 3)

Choosing between lead-acid and lithium-ion batteries for a Uninterruptible Power Supply (UPS) in critical power applications depends on several factors, including system requirements, budget, and the specific characteristics of each battery type. Here’s a detailed comparison to help you decide :

 Key Factors to Consider

Application Requirements
• Critical Load Duration: How long the UPS needs to sustain the load during a power outage.
• Space and Weight Constraints: Availability of physical space and weight tolerance for battery installation.
• Environmental Conditions: Ambient temperature and maintenance capabilities.

Long-Term Cost
• Total Cost of Ownership (TCO), which includes initial cost, maintenance, replacement, and energy efficiency.
Reliability
• Battery lifespan and performance under frequent or extended discharges.

 Lead-Acid Batteries

Advantages:
1. Lower Initial Cost:
• Lead-acid batteries are significantly cheaper upfront compared to lithium-ion.
2. Proven Technology:
• Widely used and well-understood, making them reliable in many critical applications.
3. Availability:
• Readily available and supported by most UPS systems.
4. Performance in Steady Environments:
• Performs well in controlled environments with low ambient temperatures.

Disadvantages:
1. Shorter Lifespan:
• Typical lifespan is 3–5 years, depending on usage and environmental conditions.
• More frequent replacements increase long-term costs.
2. Heavy and Bulky:
• Requires more space and structural support due to higher weight and size.
3. Maintenance Requirements:
• Valve-Regulated Lead-Acid (VRLA) batteries need regular inspections to ensure proper operation.
4. Poor High-Temperature Performance:
• High temperatures can drastically reduce lifespan and efficiency.
5. Lower Energy Density:
• Delivers less energy per unit of weight compared to lithium-ion.

Best Applications:
• Low-budget, static environments with infrequent power outages.
• Systems with limited cycling requirements (infrequent charge/discharge cycles).

20/07/2026

HOW TO SELECT SUITABLE PROTECTION SYSTEM FOR YOUR MOTOR??(Ep. 6 of 6)

- Selecting the Right Motor Protection Solution
Choosing the proper protection method depends on several application factors.

- Application Complexity
Simple standalone equipment may only require manual protection, while highly automated production lines benefit from electronic systems.

- Motor Criticality
Critical motors with high downtime costs often justify advanced electronic protection.

- Environmental Conditions
Harsh industrial environments may require robust protection features and monitoring capabilities.

- Maintenance Strategy
Facilities implementing predictive maintenance programs often prefer electronic protection with communication and diagnostic features.

- Budget Considerations
Initial equipment cost is important, but total lifecycle cost should also be considered, including:
• Downtime reduction
• Maintenance savings
• Energy efficiency
• Equipment longevity

- Fuji Electric Motor Protection Solutions
Fuji Electric offers a broad range of motor control and protection technologies designed to support industrial reliability, efficiency, and safety.

- Our solutions include:
• Manual motor starters
• Magnetic contactors
• Thermal overload relays
• Intelligent motor protection systems
• AC drives with integrated protection features
• Advanced automation technologies

Fuji Electric products are engineered to help facilities improve motor performance, reduce downtime, and support modern industrial automation requirements.

Motor protection is a critical part of maintaining reliable and efficient industrial operations. Manual, magnetic, and electronic motor protection systems each offer unique advantages depending on the application requirements, operational complexity, and protection goals.

Manual protection provides a simple and economical solution for basic applications. Magnetic protection enables automated motor control and supports larger industrial systems. Electronic protection delivers advanced diagnostics, monitoring, and intelligent protection for modern connected facilities.

As industrial operations continue evolving toward smarter, more automated systems, advanced motor protection technologies will play an increasingly important role in improving uptime, extending equipment life, and optimizing overall system performance.

ที่อยู่

43 Thai CC Tower 11th Floor, Room # 114/9, South Sathorn Road, Yannawa, Sathorn
Bangkok
10120

เวลาทำการ

จันทร์	08:00 - 17:00
อังคาร	08:00 - 17:00
พุธ	08:00 - 17:00
พฤหัสบดี	08:00 - 17:00
ศุกร์	08:00 - 17:00

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http://www.th.fujielectric.com/

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