How to Choose the Best Servo Drive Manufacturer
- High-quality servo drives are meticulously designed, manufactured, and manufactured to ensure stability and reliability. Compare the technical specifications, application examples, and test data of products from different manufacturers. You can also request samples from the servo drive manufacturer for testing or visit the production floor to gain a first-hand understanding of their production processes and quality control systems.
- Manufacturers with strong technical expertise and R&D capabilities can promptly launch innovative products that meet market demand. Investigate the size of their R&D team, the number of patents they have obtained, and their technical certifications. Attending industry exhibitions and seminars to meet with technical staff is also a way to understand their technical capabilities.
- For high-tech products, excellent technical support and after-sales service are crucial. Focus on the manufacturer's after-sales service system, including technical support response time, maintenance service availability, and timely spare parts supply. Inquire about their training services and provision of technical documentation.
- Untimely delivery can delay production plans and impact company operations. It's important to understand the manufacturer's supply chain management and production process optimization, as well as their production capacity and spare resources to handle large orders, to ensure on-time delivery.
- If your business has specialized needs, choosing a manufacturer that can provide customized solutions will greatly satisfy them. Ask about the manufacturer's experience and capabilities in customization, as well as their proven track record of successful customization.
- Don't just focus on price; consider the overall cost-performance ratio. Review product quotes from multiple manufacturers and evaluate their performance based on their technical specifications and actual usage.
- Review the manufacturer's case studies and learn about their application performance in various industries to better assess their capabilities and capabilities. If a manufacturer has extensive experience and successful applications in fields similar to yours, their products and services are more likely to meet your needs.
- Choosing a manufacturer committed to technological innovation and continuous development can ensure continued competitiveness in future production processes. Learn about the manufacturer's R&D investment, technological innovation directions, and ability to grasp industry trends.
Zhejiang Tonghang E-Drive Technology Co., Ltd. can meet all the requirements of buyers, welcome to visit our factory and exchange solutions,
15 Best Servo Drive Brands in the World
The following are 15 well-known and powerful servo drive/motion control brands, with a brief introduction to their advantages and markets.
Zhejiang Tonghang E-Drive Technology Co., Ltd.(Country：China)
The company specializes in industrial automation products such as servo drives and servo motors. Our product line includes low-, medium-, and high-voltage servo drives and servo motors. We also offer servo systems for tapping machines and servo control systems for industrial high-speed doors. We can develop customized servo products tailored to the needs of our customers" industries.
Main products:
High Speed Door Servo Motor & Controller;
High Speed Door Servo System
Siemens AG (Country：Germany)
Very strong in modular, high-precision industrial automation; broad range; strong support and ecosystem (e.g. SINAMICS drives).
WEB:https://www.simtachmotor.com/
Yaskawa Electric(Country：Japan)
Excellent in high-speed and precision; widely used in robotics and motion control.
WEB:https://www.yaskawa.co.jp/
Mitsubishi Electric(Country：Japan)
Good reliability; broad product line; strong in Asia; strong in complex motion systems.
WEB:https://www.mitsubishielectric.co.jp/ja/
Rockwell Automation (Allen-Bradley)(Country：USA)
Strong in integration with automation systems; popular in US & NA markets; robust drive hardware.
WEB:https://www.rockwellautomation.com/en-us.html
ABB Ltd.(Country：Switzerland / Sweden)
Good in heavy and high-power applications; strong global presence.
WEB:https://global.abb/group/en
Schneider Electric(Country：France)
Strong in energy efficiency, modularity; good in packaging, logistic, general automation.
WEB:https://www.se.com/ww/en/
Bosch Rexroth(Country：Germany)
Excellent for high performance, rugged environments; well-known in machine tools, industrial automation.
WEB:https://www.boschrexroth.com/ja/jp/
Omron Corporation(Country：Japan)
Often used where precision plus compactness matter; good motion control spectrum.
WEB:https://www.omron.com/jp/ja/
FANUC Corporation(Country：Japan)
Very strong in robotics and CNC; proven reliability.
WEB:https://www.fanuc.co.jp/eindex.html
Delta Electronics(Country：Taiwan China)
Good mid-range price/performance; well suited for general automation requirements.
WEB:https://www.deltaww.com/en-US/index
Lenze Group(Country：Germany)
Classical European provider; good for all-round drive & motion systems; strong in cabinets and larger systems.
WEB:https://www.lenze.com/en-de
Beckhoff Automation(Country：Germany)
Strong in digital, PC-based control; often good in applications where integration with software & communication protocols is important.
WEB:https://www.beckhoff.com/en-en/
Moog Inc(Country：USA)
High performance, often for specialized / high precision / dynamic response; aerospace, simulation, etc.
WEB:https://www.moog.com/
Inovance(Country：China)
Competitive pricing; good range; increasing global presence; good for projects balancing cost and functionality.
WEB:https://www.inovance.eu/home
What Is a Servo Drive?
A servo drive, also known as a servo amplifier, is a core power electronic device used to control the operation of servo motors in industrial automation. It serves as the servo motor's "brain" and "power source." By receiving command signals from a higher-level controller (such as a PLC, motion controller, or microcontroller), it precisely adjusts the current, voltage, and frequency output to the servo motor, achieving high-precision closed-loop control of the motor's speed, position, and torque.
Receiving commands: Obtaining target signals (e.g., "motor rotates to 3000 rpm," "move to the X-axis position 50mm") from a higher-level controller (e.g., a PLC).
- Feedback detection: Using the motor's built-in feedback elements (e.g., encoders and resolvers), the servo drive collects the motor's actual operating status (current speed, actual position, and output torque) in real time.
- Comparison and correction: Comparing the "target command" with the "actual feedback" in real time, calculating the deviation (e.g., target 3000 rpm, actual 2800 rpm, deviation 200 rpm).
- Output regulation: Automatically adjusting the power parameters supplied to the motor based on the deviation (e.g., increasing voltage, adjusting current phase), driving the motor to correct the deviation until the actual state matches the target command.
- Through this closed-loop process, the servo drive allows the motor to operate independently of interference such as load changes and voltage fluctuations, maintaining high-precision operation (e.g., position accuracy up to 0.001mm and speed fluctuation less than 0.1%).
Servo Drive Key components
The function of the servo drive depends on the coordinated work of multiple core modules inside, mainly including:
| Module Name | Core Features |
|---|---|
| Power module | It rectifies and filters external AC power (such as 220V/380V) into stable DC power, providing power for subsequent modules. |
| Control module | The core "decision-making unit," comprised of a CPU and DSP (digital signal processor), executes closed-loop control algorithms (such as PID) and processes commands and feedback signals. |
| Power drive module | It amplifies weak (low-voltage) signals from the control module into strong (high-voltage, high-current) signals, directly driving the servo motor (the core component is an IGBT power transistor). |
| Feedback processing module | It receives signals from motor feedback elements (such as encoders) and converts them into digital signals that the control module can recognize, enabling "real-time detection." |
| Protection module | To ensure equipment safety, it features protection against overcurrent, overvoltage, overload, overheating, undervoltage, and motor stall, instantly shutting off output when an abnormality occurs. |
The core difference from ordinary motor drivers
Many people confuse servo drives with drives for ordinary motors (such as stepper motors and asynchronous motors). The core difference between the two lies in "control accuracy" and "response speed". The specific comparison is as follows:
| Comparison Dimensions | Servo drive (with servo motor) | Common drives (such as stepper drives and asynchronous motor inverters) |
|---|---|---|
| Control Method | Closed-loop control (with feedback, real-time deviation correction) | Open-loop control (outputs commands only, does not monitor actual status) |
| Control Accuracy | Extremely high (position accuracy up to 0.001mm, speed fluctuation < 0.1%) | Low performance (stepper motors are prone to lost steps, asynchronous motor speed fluctuations > 1%) |
| Response Speed | Fast (millisecond-level response to load changes and command adjustments) | Slow performance (speed/torque deviations are common when the load changes) |
| Applicable Scenarios | High-precision, high-dynamic response requirements (such as robotics, precision machine tools, and semiconductor equipment) | Low precision, low dynamic requirements (such as conveyors, fans, and general assembly lines) |
Main Classification (by Control Mode)
Depending on the control objective, servo drives are generally classified into three core control modes, which can be switched according to the scenario:
- Position Control Mode: This mode focuses on maintaining the precise position of the motor shaft, for example, moving the end-of-arm to a specified coordinate or positioning the nozzle of a placement machine to the center of a component. It is commonly used in CNC machine tools, automated assembly lines, and robotic joints.
- Speed Control Mode: This mode focuses on maintaining a constant motor speed, for example, maintaining a constant 500 rpm rotation of a printing press drum or maintaining a steady speed of a packaging machine conveyor belt. It is commonly used in production line conveyors, fans, and pumps (where a constant speed is required).
- Torque Control Mode: This mode focuses on maintaining a constant motor torque, regardless of speed or position. For example, maintaining a 5N force on a robot gripper to clamp a fragile item or maintaining a constant tension on a film through a tension control system. It is commonly used in winding machines, tension control equipment, and presses.
Tonghang Servo Drives – Accuracy, High Precision & Efficiency
In the field of industrial automation, servo drives are like the "nerve center" of equipment-they determine whether robotic arms can accurately grasp parts, whether CNC machine tools can produce workpieces with micron-level precision, and whether production lines can operate stably 24/7. As a servo drive manufacturer, we're often asked by customers, "Servo drives on the market all look the same. What's the difference between yours?"
Today, we'll skip the esoteric technical jargon and focus on practical production needs to discuss how our servo drives address the most pressing issues facing factories: accuracy, reliability, and cost. This will help you intuitively determine whether this product is truly suitable for your production line.
Precision is the most important factor.
For precision manufacturing companies, even the smallest deviation often means a mountain of scrap. For example, in semiconductor packaging, a chip pin soldering deviation exceeding 0.01mm will result in scrap. The operating accuracy of medical surgical robots is directly related to surgical safety. Our servo drives are designed for ultimate precision:
- Micron-level positioning: Equipped with a 23-bit/25-bit high-resolution encoder, position control accuracy can reach ±0.001mm, speed control accuracy ≤±0.01%, and torque control accuracy ≤±1%. What does this mean? This translates to positioning error less than 1/50th the thickness of a human hair on a 1-meter-long guide rail, fully meeting the submicron requirements of applications such as semiconductor packaging, precision machine tools, and surgical robots.
- Fully closed-loop control: Often, insufficient equipment accuracy stems not from the motor, but from the backlash of gears and guide rails. Some of our models support optional external optical/magnetic scales, enabling "motor + mechanical" fully closed-loop control. This not only corrects for motor errors but also compensates for backlash in real time, elevating overall equipment accuracy to a new level.
- Fast dynamic response: Production lines inevitably encounter unexpected situations, such as a robotic arm suddenly grabbing an overweight workpiece or a sudden load change caused by material switching. Our driver boasts a current loop response bandwidth of ≥1kHz, a velocity loop of ≥200Hz, and a torque loop response time of ≤1ms. This provides instantaneous response, enabling immediate output adjustments to prevent equipment overshoot and jitter. Even more conveniently, it automatically identifies load inertia (for example, workpieces of varying weights) and optimizes parameters in real time, eliminating the need for engineers to repeatedly adjust parameters. This makes it ideal for flexible factories with high-variety, small-batch production.
- Wide speed range: With a speed ratio of up to 1:5000, low speeds can remain stable at 0.1rpm (suitable for delicate operations on engraving and assembly machines) and high speeds of up to 5000rpm (enabling continuous operation for printing and packaging machines).
High Quality
What do factories fear most? A sudden production line shutdown. A servo drive failure can halt the entire line for hours or even days, resulting in losses of hundreds of thousands of yuan.
- Unafraid of Harsh Environments: The core power transistors (IGBTs) are from leading international brands such as Infineon and Mitsubishi, with a withstand voltage rating of ≥1200V and a current-carrying capacity 30% higher than the industry average. They can withstand grid voltage fluctuations of ±15% and transient surges. The entire device also features an IP65 protection rating, and the circuit boards are triple-coated (moisture-resistant, corrosion-resistant, and dust-resistant). Even in high-temperature (-10°C to 60°C) and oil-rich heavy industrial workshops, the annual failure rate is kept below 0.1%.
- 16-Level Protection: Built-in 16 safety protection features, including overcurrent, overvoltage, undervoltage, overload, overheating, and motor stall, cut output and issue an alarm within 0.05ms if an anomaly is detected. This protects both the driver itself and downstream equipment (such as machine tool guide rails) from damage due to overload. Even more convenient, it automatically records nearly 100 fault codes, including parameters such as current, voltage, and speed at the time of the fault. This allows engineers to identify the problem at a glance and complete repairs in an average of 30 minutes, significantly reducing downtime.
- Long-life design: Many drives require replacement of capacitors and fans after just a few years, which is both troublesome and costly. We utilize electroless capacitors (or long-life solid-state capacitors with a lifespan of ≥50,000 hours) to address the root cause of capacitor aging. The fan utilizes a temperature-controlled design that activates only at high temperatures, extending its lifespan to over 30,000 hours. The entire unit has a designed lifespan of ≥8 years, two years longer than the industry average of 6 years, meaning reduced replacement costs and a longer stable operation cycle.
- Simple commissioning and easy integration
- High compatibility: Supports permanent magnet synchronous servo motors and asynchronous servo motors (select models) with power ranges from 0.1kW to 150kW, providing a suitable model for applications ranging from laboratory instruments to metallurgical equipment. Communications are a breeze, too. Built-in support for mainstream industrial buses like EtherCAT, Profinet, Modbus-TCP, and CANopen (optional) allows for seamless integration with PLCs and motion controllers from brands like Siemens, Mitsubishi, and Delta, eliminating the need for additional communication modules and reducing integration costs.
- The accompanying visual debugging software (available for Windows and tablets) features a "one-click auto-tuning" function. With one click, the driver automatically identifies motor parameters like inertia, resistance, and inductance, and optimizes control parameters, reducing debugging time from the traditional 1-2 hours to under 5 minutes. The graphical interface includes Chinese definitions and recommended values for key parameters (such as position gain and speed limit). The included manual and video tutorials ensure even novice engineers can quickly get started.
- Modular Design: Utilizing DIN-rail mounting compliant with the IEC 60715 standard, the unit is 20% smaller than similar-power products, saving space in the control cabinet. The terminal blocks are designed for error-proofing, with terminals for different signals distinguished by color and shape, making it difficult for even novice users to make misconnections. The core modules (power module and driver module) can be individually disassembled. In the event of a partial failure, customers can replace the entire drive on-site without having to return it to the factory, reducing back-and-forth processing time.
Cost Control
When selecting a servo drive, consider not only the purchase price but also the "full lifecycle cost" (purchase + energy consumption + maintenance + replacement). Our products are designed to help customers save real money over the long term:
- High Energy Efficiency = Low Electricity Bills: Utilizing a vector control algorithm and a highly efficient power topology, the unit achieves an overall efficiency of 97%-98.5% (compared to 95%-96% for traditional drives). For example, a 15kW drive running 8 hours per day, 300 days per year, at an industrial electricity price of 1 yuan per kWh, can save 1,200 to 1,800 yuan per year compared to traditional products. If a workshop has 10 such drives, the annual savings could reach 12,000 to 18,000 yuan, with the equipment price difference recouped in about two years. Furthermore, it features a sleep mode, reducing energy consumption to less than 5% of rated power when the device is in standby mode, thus saving inefficient energy.
- Low Maintenance: The brushless design (select models) and long-life components mean that under normal use, core components (capacitors, fans, etc.) do not need replacement for five years, while traditional drives require replacement of consumable parts every two to three years. Assuming annual maintenance, our product can reduce annual maintenance costs by 30% to 50%. Some high-end models also support remote diagnostics, enabling operational status monitoring via an industrial bus or IoT module to provide early warning of potential failures. This reduces the labor costs of on-site inspections and avoids production losses caused by unexpected downtime.
- Dual Product Lines: We offer two product lines: a "standard series" and a "customized series." Standardized products cover 80% of common scenarios (such as standard automated production lines) and are priced close to the mid-range market, offering excellent value for money. Customized products can be developed to meet specific customer requirements (such as explosion-proof ratings, low-temperature compatibility, and specialized communication protocols). Whether you're working with a small or medium-sized factory with a limited budget or a large enterprise with high-end needs, you can find the right product without spending extra for features you don't need.
Customized Solutions
- Intelligent Anti-interference: Many factory workshops contain a large number of high-power devices (such as punching machines and welding machines). These devices can interfere with the power grid during startup, causing unstable servo drive operation. Our drives feature built-in active harmonic suppression (THD ≤ 5%), eliminating the need for additional filters. This reduces grid pollution and resists external interference, ensuring stable operation even in densely populated heavy industrial workshops.
- Safety and Compliance: Exports to the EU and North America, or clients producing medical and aviation equipment, have stringent safety certification requirements. Our products have obtained international safety certifications such as CE, UL, and TÜV, complying with ISO 13849-1 Safety Category 3. They also support safety features such as STO (Safe Torque Off) and SS1 (Safe Stop 1). This allows us to directly enter these high-end markets without requiring additional certification, saving customers time and costs.
- Open Ecosystem: Large equipment manufacturers and research institutions sometimes require customized control logic for specialized processes (such as the nonlinear motion trajectories of specialized machine tools or flexible gripping algorithms for robots). We provide API development interfaces and a custom control algorithm platform, allowing customers to independently develop control programs without relying on our customization cycles. This significantly increases R&D flexibility and allows them to establish their own technological barriers.
- Choosing a servo drive is like choosing a solution.
- In reality, there's no such thing as the "best" servo drive, only the "most suitable" one. We never simply compete on specifications. Instead, we aim to help customers solve practical problems like "insufficient machining accuracy," "frequent production line downtime," "difficult debugging," and "high long-term costs" through our products' precision, reliability, and ease of use.
- If you're struggling to choose a production line, please share your scenario: precision machine tools or industrial robots? High-temperature workshops or overseas exports? We can tailor our solutions to your needs, from product design to commissioning. After all, ensuring your equipment operates efficiently, stably, and cost-effectively is our core goal.